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AAON Outdoor Airflow Measurement System Operation & Maintenance Manual Engineered for accuracy, applicability, Durability and simplicity

AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

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Page 1: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual Engineered for accuracy applicability Durability and simplicity

TABLE OF CONTENTS

1 INTRODUCTION 5

11 DESCRIPTION 5

12 BASIC OPERATION 6

2 AIRFLOW STATION 7

21 SPECIFICATIONS 7

Material 7 211

Temperature 7 212

Humidity 7 213

Instrument Connections 7 214

22 MAINTENANCE 7

3 TEMPERATURE TRANSMITTER 8

31 SPECIFICATIONS 8

Supply Voltage 8 311

Combined Accuracy (Linearity Hysteresis and Repeatability) 8 312

Temperature Range 8 313

Output 8 314

32 DIMENSIONS 8

33 ELECTRICAL CONNECTION 8

4 AIRFLOW SIGNAL PROCESSOR 11

41 SPECIFICATIONS 11

Power Supply 11 411

Power Consumption 11 412

Accuracy 11 413

Temperature Input 11 414

Process Output Options 11 415

HighLow Alarm Relay Outputs 11 416

42 SAFETY 11

Electrical Connections 11 421

Static Electricity 11 422

43 DIMENSIONS 12

44 ELECTRICAL amp PNEUMATIC CONNECTIONS 12

45 INPUTOUTPUT SET-UP 15

Process Output 15 451

Temperature Input 15 452

46 ACTIVE DISPLAYS amp KEY FUNCTIONS 16

Power-up Initiation Display 16 461

Process Display Descriptions 16 462

Key Functions 17 463

47 DISPLAY MENUS 18

48 FIELD SETUP MENUS 18

Operating Range 19 481

Zero Pressure Calibration 19 482

Engineering Units 19 483

Lockdown 20 484

Flow Correction 21 485

AutoZero 21 486

Temperature Compensation 22 487

Display Filter 25 488

Process Output Filter 25 489

HighLow Alarm Option 26 4810

Factory Defaults 27 4811

49 TECH CONFIGURATION MENUS 28

Area Factor 28 491

Minimum Calibration 30 492

Span Calibration 30 493

Altitude 30 494

Process Output Calibration 32 495

Probe Coefficient 32 496

Four Point Flow Correction 33 497

MAC Address (BACnet Communication Option) 33 498

Instance Number (BACnet Communication Option) 34 499

Modbus ID (Modbus Communication Option) 34 4910

Baud Rate (BACnet amp Modbus Communication Options) 34 4911

410 WARNING MESSAGES 35

Input Pressure Overrange Message 35 4101

Transducer Calibration Message 35 4102

Operating Range Message 35 4103

New Operating Range Message 35 4104

411 NETWORK COMMUNICATION 36

Electrical Connection 36 4111

Parameter Configuration 40 4112

BACnet Protocol Implementation Conformance Statements 42 4113

Modbus Software Configuration Parameters 46 4114

LonWorks Network Variables 48 4115

412 TROUBLESHOOTING 51

Base Unit 51 4121

BACnet Communication Option 53 4122

Modbus Communication Option 55 4123

LonWorks Communication Option 56 4124

INDEX OF TABLES AND FIGURES

Table 1 - Process Output Switch Configuration 15

Table 2 - Temperature Input Switch Configuration 15

Table 3 - Process Display Descriptions 16

Table 4 - Key Functions 17

Table 5 - Display Menus 18

Table 6 - Engineering Units 20

Table 7 - Factory Defaults 27

Table 8 - BACNET Protocol Implementation Conformance Statements 43

Table 9 - Standard Object Types Supported 44

Table 10 - Multistate Value 5 Engineering Units State_Textlist 45

Table 11 -MODBUS Software Configuration Parameters 46

Table 12 - MODBUS Device Objects 47

Table 13 -Engineering Unit Data Value Descriptions 48

Table 14 -MODBUS Exception Codes 48

Table 15 -Identification Of LONWORKS Module 48

Table 16 -LONWORKS Network Variables 49

Table 17 - Network Variable Types 50

Table 18 - Configuration Property 50

Table 19 -Base Unit Troubleshooting Table 51

Table 20 -BACNET Communication Troubleshooting Table 53

Table 21 -MODBUS Communication Troubleshooting Table 55

Table 22 - LONWORKS Communication Troubleshooting Table 56

Figure 1 - Electrical Connections 9

Figure 2 - Temperature Transmitter Positive amp Negative Connectors 10

Figure 3 - Electrical Connections 13

Figure 4 - Electrical Connection with Wattmaster Controls 14

Figure 5 - Pneumatic Connections 15

Figure 6 - Key Functions 17

Figure 7 - Network Communication Electrical Connection 37

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not Requiring

Common Signal Grounds 38

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds 38

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location 39

5

1 INTRODUCTION

11 DESCRIPTION

The AAON Outdoor Airflow Measurement System includes an airflow station airflow signal

processor and temperature transmitter and is capable of producing an overall plusmn05 accuracy

through the velocity range of 200 to 1200 fpm and plusmn5 accuracy at 100 fpm

The airflow station consists of multiple airflow elements factory mounted in the air handling

unit and pre-piped to the airflow signal processor Optional inlet bells are used for high turn

down or low velocity applications Standard materials consist of a G90 galvanized casing and

6063-T5 anodized aluminum flow sensors suitable for most HVAC applications The airflow

averaging elements are head type devices which generate a differential (velocity) pressure signal

similar to the orifice venturi and other head producing primary elements The airflow station is

constructed so as to comply with ASHRAE Standard 111 for equal area traversing of an airflow

measurement plane Multiple elements are manifolded together for connection to the airflow

signal processor

The airflow signal processor utilizes current state-of-the-art digital microprocessor technology

capable of producing unequaled 24-bit (16777216 steps) AD and 12 bit (4096 steps) DA

signal conversion resolution The ultra-low operating range and auto zeroing function of the

airflow signal processor provides accurate airflow measurement down to 100 fpm The signal

processor accepts a temperature input signal for air temperature indication temperature signal

transmission for remote readout and air density compensation for standard or actual airflow

calculations A password protected configuration menu provides quick and simple field

configuration by authorized personnel Field configuration of engineering units process noise

filtering operating range alarm set points etc are performed via user friendly menus and a six

button touch pad Device monitoring and configuration can also be performed by a building

management system through an optional LonWorksreg BACnetreg-MSTP Master or Modbusreg

Slave communication network Optional features also include HighLow Remote Alarms

A temperature transmitter with 4-20mA output and temperature range of -30 to 130degF is included

in the installation to provide a temperature input signal to the airflow signal processor for air

density calculations

6

12 BASIC OPERATION

The airflow station produces pneumatic output signals referred to as total (high) and static (low)

pressure These two pressures are piped to the airflow signal processor where the static pressure

is subtracted from the total and the result indicated as velocity pressure (differential pressure)

This measured differential pressure is equal to the average velocity of the air stream moving

through the plane that the airflow station is located in This signal can be converted to air

velocity and flow using the following equations

a

aT

460

921293251

a

VPV

71096

AVQ

Where

a Actual density of air in lbft3 (0075 lbft

3 at sea level and 68degF)

aT = Actual temperature in degF (default value is 68degF)

PV = Velocity pressure in inches H2O

V = Velocity in fpm

Q = Flow in cfm

A = Area in ft2

This signal is scaled and linearized before being displayed and transmitted out as a 4-20mA 0-

5VDC or 0-10VDC signal

The AutoZero feature corrects any zero offset caused by large ambient temperature changes

The Temperature Compensation feature compensates the flow signal for density changes caused

by variations in the air temperature

7

2 AIRFLOW STATION

21 SPECIFICATIONS

Material 211

Elements - 6063-T5 anodized aluminum

Casings - 16 ga G90 galvanized steel

Temperature 212

350F continuous operation (in air)

400F intermittent operation (in air)

Humidity 213

0 to 100 non-condensing

Instrument Connections 214

frac14rdquo compression suitable for use with thermoplastic or copper tubing thermoplastic tubing

requires the use of tubing inserts

22 MAINTENANCE

Since the sensing elements have no moving parts only periodic cleaning may be required The

sensing elements should be inspected for fouling of the sensing holes as part of an annual

preventative maintenance program Installations having viscous airborne particles may require

more frequent inspection If the sensing holes on the elements have become fouled or plugged

the following procedure is recommended Although the sensing elements are not fragile by

design care must be taken not to damage or disfigure the cylinder surface when handling

Particular attention must be given to the surface areas in which sensing ports are located

Caution prior to performing the following cleaning procedure the AAON Airflow Signal

Processor must be isolated by disconnect the Total (High) and Static (Low) Pressure

connections on the AAON Airflow Station

- Backpurging Connect cleandry compressed air set at a maximum pressure of 25

psi to the output pressure ports (total andor static) of the sensing element being

cleaned While purging the sensing element wipe the surface of the cylinder with a

cloth or brush to loosen and remove all contaminant buildup

- Cleaning In applications where the sensing elements are subject to viscous

contaminants it is recommended that the surface be washed with a cleaning agent

The cleaning agent used must be suitable for use on aluminum

8

3 TEMPERATURE TRANSMITTER

31 SPECIFICATIONS

Supply Voltage 311

85 to 32VDC

Combined Accuracy (Linearity Hysteresis and Repeatability) 312

plusmn020 of full scale

Temperature Range 313

-30degF to 130degF

Output 314

4-20mA

32 DIMENSIONS

TEMPERATURETRANSMITTER

Model ATT-1

AAON PN V28580

255

370

222

PG1116KNOCKOUT(TYP OF 6)

325

725(STANDARD)

reg

33 ELECTRICAL CONNECTION

All electrical connections from the AAON Temperature Transmitter to the AAON Airflow

Signal Processor have been made at the factory as shown in Figure 1 below Figure 2 shows the

AAON Temperature Transmitter positive and negative connector locations The following

procedure outlines the steps for checking the interface wiring if required

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

9

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor and

the AAON Temperature Transmitter cover by turning each screw counter

clockwise

Step 2 Remove the covers

Step 3 Verify that the Power Switch (S3) on the AAON Airflow Signal Processor is in

the OFF position

Step 4 Confirm the installation of the interface wiring for Pins 4 and 5 on the AAON

Airflow Signal Processor are connected to the positive and negative connectors on

the AAON Temperature Transmitter as shown in Figures 1 and 2 The three

electrical connectors (J1 J2 and optional J3) on the AAON Airflow Signal

Processor have removable terminal blocks for ease of installing the interface

wiring

Step 5 Verify that the Temp Input Switch (S1) on the AAON Airflow Signal Processor is

set to the mA position

Step 6 Turn the Power Switch (S3) on the AAON Airflow Signal Processor to the ON

position see Section 461 and 462 for display descriptions

Step 7 Replace the covers by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

(4-20mA LOOP

POWERED)+

- TRANSMITTER

S1S2 S4

+ 24VDC OUTPUT POWER

- TEMPERATURE INPUT(GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATIONS

- NETWORK COMMUNICATIONS

- PROCESS OUTPUT(GND)

+ PROCESS OUTPUT

8

10

9

4

6

7

5

J2

TEMPERATURE

S1 SET TO

mA POSITION

Figure 1 - Electrical Connections

10

+-

4-2

0m

A C

urre

nt L

oop

BACK SIDE OF COVER

RTD CONNECTION

Figure 2 - Temperature Transmitter Positive amp Negative Connectors

11

4 AIRFLOW SIGNAL PROCESSOR

41 SPECIFICATIONS

Power Supply 411

20 to 28 VACDC

Power Consumption 412

250mA at 24VAC

175mA at 24VDC

Accuracy 413

plusmn025 full scale

Temperature Input 414

4-20mA

Process Output Options 415

0-5VDC

0-10VDC

4-20mA (700Ω maximum load)

HighLow Alarm Relay Outputs 416

Two single (1 form C) dry contacts rated for

5 amps at 30VACDC

10 amps at 120VAC

42 SAFETY

Electrical Connections 421

Before any electrical connections are made ensure the POWER SWITCH is in the OFF

position

Static Electricity 422

The circuit board contains components which are susceptible to damage caused by static

electrical discharge Should it be necessary to remove the circuit board from the enclosure

appropriate precautions must first be taken to ensure that the operator and the circuit board are at

the same electrical potential

12

43 DIMENSIONS

100000ACFM

75 F

J1 J2

TOTALCONNECTION

STATICCONNECTION

462

5785

2265

350

525

Air Fl o wS IGN AL PROCES S OR

AAON

44 ELECTRICAL amp PNEUMATIC CONNECTIONS

All electrical and pneumatic connections to the AAON Airflow Signal Processor have been

made at the factory as shown in Figures 3 through 5 below with the exception of the electrical

connection for the HighLow Alarm Option if ordered and for network communication options

other than with WattMaster Controls The following procedure outlines the steps for turning

ON the AAON Airflow Signal Processor if network communication is required see Section

411 prior to turning ON the AAON Airflow Signal Processor

Caution ndash If electrical connections need to be rewired all electrical connections must be made

with the AAON Airflow Signal Processor Power Switch in the OFF position The three

electrical connectors (J1 J2 and optional J3) have removable terminal blocks for ease of

installing the interface wiring

13

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 4 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

(24VACDC)

POWER SUPPLY

ANALOG RECEIVING DEVICE

PROCESS OUTPUT

S1S2 S4

+

-

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

SWITCH POSITIONS

SHOWN IN BLACK

S1 POSITION

INDICATING 4-20mA

TEMPERATURE INPUT

S2 AND S4 POSITIONS

INDICATING 0-10VDC

PROCESS OUTPUT

RP1

S3

AAON

TEMPERATURE

TRANSMITTER

(4-20mA LOOP POWERED)+

-

Figure 3 - Electrical Connections

14

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROCOUTPUT

mA

V

10V

5V

(24VACDC)

POWER SUPPLY

ANALOG RECEIVING DEVICE

PROCESS OUTPUT

S1S2 S4

+

-

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

SWITCH POSITIONS

SHOWN IN BLACK

S1 POSITION

INDICATING 4-20mA

TEMPERATURE INPUT

S2 AND S4 POSITIONS

INDICATING 0-10VDC

PROCESS OUTPUT

RP1

S3

E-BUS DISTRIBUTION MODULE

+-

AAON

TEMPERATURE

TRANSMITTER

(4-20mA LOOP POWERED)+

-

- COMM

+ COMM

GND

THE SHIELDING WIRE SHOULD BE USED TO

CONNECT WATTMASTER GROUND TO AIRFLOW

SIGNAL PROCESSOR GROUND

Figure 4 - Electrical Connection with Wattmaster Controls

15

J1 J2

TOTAL

CONNECTION

STATIC

CONNECTION

TOTAL PRESSURE CONECTION

AAON AIRFLOW STATION

STATIC PRESSURE CONNECTION

AAON AIRFLOW STATION

Figure 5 - Pneumatic Connections

45 INPUTOUTPUT SET-UP

If input or output configuration changes are required refer to the Tables 1 and 2 in the sections

below and Figure 3 in Section 44

Process Output 451

If controls are provided by AAON the process output has been set by the factory for input to the

specific controller otherwise the default is 0-10VDC To change the output configuration set

the S2 amp S4 switches as follows

Table 1 - Process Output Switch Configuration

Process Output Range S2 S4

Current 4-20mA NA mA

Voltage 0-10VDC 10V V

Voltage 0-5VDC 5V V

Temperature Input 452

Since the AAON Temperature Transmitter has been provided the temperature input has been set

by the factory for 4-20mA To change the input configuration set the S1 switch as follows

Table 2 - Temperature Input Switch

Configuration

Temperature Input S1 Switch Selection

4-20mA mA

0-10VDC V

16

46 ACTIVE DISPLAYS amp KEY FUNCTIONS

Power-up Initiation Display 461

Upon initial power-up Software Revision information will be displayed on the graphic display

for approximately 5 seconds

EQ-1

Software Rev XXXXX

Modbus Rev XXXXX

Process Display Descriptions 462

After power-up initialization the following information will appear on the graphic display

depending upon the options purchased

75˚F

75˚F

75˚F

000000

000000

000000

AutoZero

ACFM

High Alarm

ACFM

Low Alarm

ACFM

Flow Monitoring with an

Auto Zero Cycle

Flow Monitoring with a

High Alarm Condition

Flow Monitoring with a

Low Alarm Condition

Table 3 - Process Display Descriptions

Number Description

1 Process value

2 Air Flow temperature units in degree F or C

3 Flashing Asterisk indicates the CPU is functioning

4 Engineering units

5 Displayed during an AutoZero cycle

6 Indicating High Alarm Value has been exceeded (HighLow Alarm Option)

7 Indicating Low Alarm Value has been exceeded (HighLow Alarm Option)

12 3

4

6

7 5

17

Key Functions 463

The following figure and description identify the function of each Key

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

2

13

4

567

8

RP1 9

Figure 6 - Key Functions

Table 4 - Key Functions

Number Description

1 Enter Key - Allows a user to enter into the Field Menu enter into a selected menu item

or store into memory changes made to the program

2 Up Key - Allows the user to scroll up in the menu list to a selected item or increase digits

when making value changes

3 Right Key - When making changes to user values the Right Key allows the user to scroll

to the correct digit for changes

4 Down Key - Allows the user to scroll down in the menu list to a selected item or

decrease digits when making value changes

5 Left Key - When making changes to user values the Left Key allows the user to scroll to

the correct digit for changes

6

Escape Key - The Escape Key allows the user to back out of the menu to the Active

Display If a user starts to make a change and decides to cancel the change the Escape

Key will allow the user to return to the Active Display without making the change

7 Power Switch ndash Allows a user to turn power off to the AAON Signal Processor during

field wiring or modifications to the device

8 Lon Switch ndash Allows a user to send a unique Neuron device ID when connecting to a

LonWorks communication network

9 RP1 ndash Allows a user to adjust the display contrast

18

47 DISPLAY MENUS

Table 5 shows the Field Setup and Tech Configuration Menus The display will vary depending

upon the options purchased

Table 5 - Display Menus

Field Setup Menu

(Press ENTER Key)

Tech Configuration Menu

(Press UPDOWN Keys simultaneously)

(Enter Password number 1000)

(Press ENTER Key)

Operating Range Area Factor

Zero Calibration Min Calibration

Eng Units Span Calibration

Lockdown Temp Fixed Value

Flow Correction Altitude

AutoZero Output Calibration

Temp Comp Correction Coeff

Display Filter 4PT Flow Corr

Output Filter MAC Address (Optional)

Alarm Options (Optional) Instance Number (Optional)

Factory Defaults Modbus ID (Optional)

Baud Rate (Optional)

48 FIELD SETUP MENUS

To set parameters under the Field Setup Menus refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Field Setup Menu by depressing and holding the Enter Key for 5

seconds

Step 2 Once in the Field Setup Menu use the UpDown Keys to highlight the

required parameter for configuration as shown in Sections 481 through

4811 Press the Enter Key once to access the highlighted parameter

Menu

Step 3 Once in the parameter menu the parameter can be changed using

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Field

Setup Menu

Step 4 After all of the required parameters have been configured exit the Field

Setup Menu by pressing the ESC Key The Process Display (see Section

462) will then be displayed

19

Operating Range 481

The Operating Range allows the user to enter a value which will represent 100 of the process

output signal (5VDC 10VDC or 20mA) The Operating Range Value has been set by the

factory to equal 110 of the design supply flow rate unless this value is less than the Minimum

Full Scale Value allowed for the AAON Airflow Signal Processor The menu will display the

Minimum Full Scale Value allowed which is then entered as the Operating Range

Field Setup

Menu

Operating Range Operating Range

Zero Calibration ( ACFM )

Engineering Units (6000-12000)

Lockdown (010000)

Zero Pressure Calibration 482

The Zero Calibration Menu allows the user to perform a zero transducer calibration to eliminate

any transducer zero shift

(Caution Before performing a zero calibration disconnect the Total (High) and Static (Low)

pressure connections perform a zero calibration and then reconnect the Total and Static

pressure connections)

Field Setup

Menu

Operating Range Input Value CPU Taking

Zero Calibration (0000) Inch wc Samples

Engineering Units

Lockdown (Press Enter) (Please Wait)

Engineering Units 483

Table 6 lists the engineering units that are available for the user to select from for display

purposes Changing the engineering units will affect the process display and the alarm value

menus The default setting is ACFM

Field Setup

Menu

Operating Range Eng Units

Zero Calibration

Engineering Units (ACFM)

Lockdown

20

Table 6 - Engineering Units

Standard

Flow

Units

Actual

Flow

Units

SCFM ACFM

SCFH LS

SLS Am3S

Sm3S Am3M

Sm3M Am3HR

Sm3HR

Lockdown 484

Due to the high square root gain associated with very low delta p values the display and process

output are locked to a zero value until the input value reaches the specified Lockdown Value that

was entered Above the Lockdown Value the output is linear to air flow

4841 Lockdown Value

The Lockdown Value can be changed from 0 to 20 of Operating Range Value Lockdown

Values can be changed in 1 increments The recommended standard is 5

Field Setup

Menu

Operating Range Lockdown (0-20)

Zero Calibration (5)

Engineering Units Delay (0-20 sec)

Lockdown (2) Sec

4842 Lockdown Delay

The Lockdown Delay Menu allows the user to enter a lockdown time delay (0-20 seconds) that

will delay the display and output lockdown from occurring until the flow value or output value

has remained below the lockdown value for that duration

Field Setup

Menu

Operating Range Lockdown (0-20)

Zero Calibration (5)

Engineering Units Delay (0-20 sec)

Lockdown (2) Sec

21

Flow Correction 485

The Flow Correction Menu was incorporated into the AAON Airflow Signal Processor to give

the user an easy way to make corrections to the display and output without changing the

Operating Range Value entered by the factory or user The Flow Correction Menu would be

used to correct for a constant error from zero to the entered Operating Range Value

4851 Flow Correction (K-Factor)

If the user knows the change required to match the balancers reading select the K-Factor

Menu and enter this value for the K-Factor The minimum and maximum allowable K-Factor

Value is displayed in the K-Factor Menu

Field Setup

Menu

Flow Correction Flow Correction

AutoZero K-Factor K-Factor Range

Temp Comp (085 13)

Display Filter K-Factor Calc K=(01000)

4852 Flow Correction (K-Factor Calculator)

If the new K-factor Value needs to be calculated select the K-Factor Calc Menu Enter the

Displayed Value on the AAON Airflow Signal Processor and actual Measured Value press

Enter and the change will be calculated and stored as the new K-Factor Value

Field Setup

Menu

Flow Correction Displayed Value

AutoZero K-Factor (000000)

Temp Comp Measured Value

Display Filter K-Factor Calc (000000)

-FLOW CORRECTION EXAMPLE-

The balancer is consistently measuring a value of 9500 CFM which is 500 CFM less than the

10000 CFM value on the AAON Airflow Signal Processor display The user would then

perform the following math function Measured Value Displayed Value = K-Factor so 9500

CFM 10000 CFM = 0950 The user would enter 0950 for the K-Factor Flow Correction If

the K-Factor Calculator is used the K- Factor Flow Correction would automatically update the K

Factor

AutoZero 486

The AutoZero feature corrects any zero offset caused by large ambient temperature changes

22

4861 AutoZero Status

The AutoZero Status Menu allows the user to turn the AutoZero function ON or OFF

Field Setup

Menu

Flow Correction AZ Status AZ Status

AutoZero AZ Interval (ONOFF)

Temp Comp AZ Test Interval

Display Filter (ON)

4862 AutoZero Interval

The AutoZero Interval Menu allows the user to select the AutoZero Interval from once an hour

to once a day in 1 hour increments Use the UPDOWN keys to select the interval value Upon

device power up an AutoZero cycle will occur after 20 seconds

Field Setup

Menu

Flow Correction AZ Status AZ Interval

AutoZero AZ Interval (1 TO 24HR)

Temp Comp AZ Test Interval

Display Filter (01)HR

4863 AutoZero Test Interval

For troubleshooting or testing the AutoZero function the AutoZero Test Interval Menu allows

the user to select an Auto Zero test frequency of once a minute to once every 30 minutes in 1

minute increments Use the UPDOWN keys to select the interval value If AutoZero Test

Interval is turned ON for more than 60 minutes it will automatically default to OFF and the

AutoZero Interval (see Section 4862) will be reactivated

Field Setup

Menu

Flow Correction AZ Status AZ Test Interval

AutoZero AZ Interval (OFF)

Temp Comp AZ Test Interval Interval

Display Filter (1)Min

Temperature Compensation 487

The Temperature Compensation option compensates the flow and velocity signal for density

changes caused by variations in the process air temperature An input signal from AAON

Temperature Transmitter is required see Section 33 for proper temperature transmitter

connection and Section 452 for temperature input signal configuration

23

4871 Temperature Units

The Temperature Units Menu allows the user to select the appropriate temperature units for the

job The default setting is ordmF

Field Setup

Menu

Flow Correction Temperature Units Units

AutoZero Temperature Values (ordmF ordmC)

Temp Comp Temperature Input

Display Filter Fixed Value (ordmF)

4872 Temperature Values

The Temperature Values Menu allows the factory or user to set the minimum and maximum

temperature range values that represent the input signal from the external temperature transmitter

or the building automation system Since the AAON Temperature Transmitter has been supplied

the minimum and maximum temperature range values of -30degF to 130degF have been

preprogramed

Field Setup

Menu

Flow Correction Temperature Units Minimum Value

AutoZero Temperature Values (-030)

Temp Comp Temperature Input Maximum Value

Display Filter Fixed Value (130)

If the temperature values are changed from the factory settings and the new temperature values

cause the existing Operating Range Value to be outside the new calculated Minimum or

Maximum Full Scale Value the below Warning Message will appear and the Operating Range

will be reset to the new Maximum Full Scale Value by pressing Enter The display will

automatically jump to the Operating Range Menu allowing the user to enter a new Operating

Range Value This can be accomplished by performing the steps under Section 481 See

Temperature Range Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

24

Minimum Value

(-000)

Maximum Value

(000)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Min amp

Max Temperature

value and pressing the

Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Temperature Range Example-

Minimum Value

(-000)

Accepted

(100)

4873 Temperature Input

The Temperature Input Menu allows the user to select between three temperature input options

(Fixed Variable and Network) for the flow calculations Since the AAON Temperature

Transmitter has been supplied Variable has been selected If Fixed is selected the default

temperature value entered in the Fixed Value Menu (see Section 4874) is used If Net is

selected the temperature input signal is obtained through network communications The Net

option is only available if one of the communication options is ordered The temperature value

is only displayed on the LCD screen if the Temperature Input is set to Variable or Network

Field Setup

Menu

Flow Correction Temperature Units Temp Input

AutoZero Temperature Values (FixVarNet)

Temp Comp Temperature Input

Display Filter Fixed Value (Variable)

25

4874 Fixed Value

The Fixed Value Menu allows the user to enter a temperature value for the flow calculations

This value will not be displayed on the LCD screen

Field Setup

Menu

Flow Correction Temperature Units Fixed Value

AutoZero Temperature Values (˚F)

Temp Comp Temperature Input

Display Filter Fixed Value (+068)

Display Filter 488

The Display Filter Menu allows the user to adjust the Display Filter rolling average algorithm by

setting the Sample Interval Time value in seconds and the number of rolling average Sample

Counts The adjustment range of the Sample Interval Time is 010 to 655 seconds in 010

increments The Sample Count range is 0 to 150 Sample Counts The Display Filter is

independent of the Process Output Filter Value (See Section 489)

Field Setup

Menu

Flow Correction Sample Interval Time

AutoZero (005)sec

Temp Comp (0-150) Sample Count

Display Filter (010)

Process Output Filter 489

The Process Output Filter Menu allows the user to adjust the Process Output Filters rolling

average algorithm by setting the Sample Interval Time value in seconds and the number of

rolling average Sample Counts The adjustment range of the Sample Interval Time is 010 to

655 seconds in 010 increments The Sample Count range is 0 to 150 Sample Counts The

Process Output Filter is independent of the Display Filter Value (See Section 488)

Field Setup

Menu

Output Filter Sample Interval Time

Alarm Options (005)sec

Factory Defaults (0-150) Sample Count

(010)

26

HighLow Alarm Option 4810

The following menus for configuration of HighLow Alarms are only available if the HighLow

Alarm option is purchased

48101 Alarm Status

The Alarm Status allows the user to independently turn each alarm ON or OFF

Field Setup

Menu

Output Filter Alarm Status Low Alarm

Alarm Options Alarm Value (On)

Factory Defaults Alarm Delay High Alarm

(On)

48102 Alarm Values

The Alarm Value Menu allows the user to enter the Low or the High flow alarm value Alarm

values will be displayed in the same engineering units selected in the Eng Units Menu (see

Section 483)

- High Alarm Function The High Alarm activates if the flow exceeds the High Alarm

value and resets when the flow drops below the High Alarm Value

- Low Alarm Function The Low Alarm activates if the flow drops below the Low

Alarm Value and resets when the flow exceeds the Low Alarm Value

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Value

Alarm Options Alarm Value (000000)

Factory Defaults Alarm Delay Hi Alarm Value

(100000)

48103 Alarm Delay

The Alarm Delay Menu allows the user to enter an alarm delay of 0 to 999 seconds before an

alarm will be activated The alarm will be reset without a delay

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Delay

Alarm Options Alarm Value (000)Seconds

Factory Defaults Alarm Delay Hi Alarm Delay

(000)Seconds

27

Factory Defaults 4811

If parameter configuration changes have been made incorrectly to the AAON Airflow Signal

Processor all device settings can be restored to the original AAON factory settings by selecting

YES and pressing Enter in both the Set To Factory Defaults Menu and the Verify Set To Factory

Defaults Menu (see Table 7 below for a list of Saved Settings)

Field Setup

Menu

Output Filter Set To Verify Set To

Alarm Options Factory Defaults Factory Defaults

Factory Defaults

(No) (No)

Table 7 - Factory Defaults

Item Saved Setting Item Saved Setting

1 All Factory Calibration Points (12) 14 MAC Address

2 Area Factor 15 Instance Number

3 Operating Range 16 Engineering Units

4 4 Pt Flow Correction 17 Display Filter Values

5 Altitude 18 Output Filter

6 K-Factor 19 DP Display Format

7 Lockdown amp Delay Values 20 Output Calibration

8 Flow Correction 21 AutoZero Status

9 Flow Coefficient 22 AutoZero Interval

10 Min amp Max Temp Range Values 23 Temp Units

11 Alarm Status 24 Temp Input

12 Alarm Values 25 Temp Fixed Value

13 Alarm Delay 26 Baud Rate

28

49 TECH CONFIGURATION MENUS

To set parameters under the Tech Configuration Menu refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 491

through 4911 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

Area Factor 491

To convert the differential pressure signal from the AAON Airflow Station to a flow value the

Area Factor associated with the AAON Airflow Station has been preprogramed by the factory

If the Area Factor needs to be checked or reconfigured the correct Area Factor for the AAON

Airflow Station can be found on the AAON Airflow Station product label installed in the air

handling unit

Tech Config

Password 1000

Area Factor Area Factor

Min Calibration (FT2)

Span Calibration

Altitude (001000)

29

If the Area Factor is reconfigured and the new Area Factor causes the existing Operating Range

Value to be outside the new calculated Minimum or Maximum Full Scale Value the below

Warning Message will appear and the Operating Range will be reset to the new Maximum Full

Scale Value by pressing Enter The display will automatically jump to the Operating Range

Menu allowing the user to enter a new Operating Range Value This can be accomplished by

performing the steps under Section 481 See Area Factor Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Area Factor

(FT )

(001000)

Area Factor

(FT )

Accepted

(001200)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Area

Factor and pressing

the Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Area Factor Example-

2

2

30

Minimum Calibration 492

The Minimum Calibration Menu allows a user to perform a minimum transducer calibration

This value will be placed in a different memory location and used until a Return to Factory

Defaults is selected (see Section 4811)

(Caution Before performing a minimum calibration disconnect the Total (High) and Static

(Low) Pressure connections perform a minimum calibration and then reconnect the Total

and Static Pressure connections)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00000) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Span Calibration 493

The Span Calibration Menu allows the user to perform a span transducer calibration to eliminate

any possible transducer drift This value will be placed in a different memory location than the

Factory Span memory location and used until a Return to Factory Defaults is selected (see

Section 4811)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00570) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Altitude 494

The Altitude Menu allows the user to enter the specific altitude for the job for the density

calculations the job specific site Altitude has been preprogramed by the factory

Tech Config

Password 1000

Area Factor Altitude

Min Calibration

Span Calibration (0000)Ft

Altitude

31

If the Altitude is changed from the factory setting and the new Altitude causes the existing

Operating Range Value to be outside the new calculated Minimum or Maximum Full Scale

Value the below Warning Message will appear and the Operating Range will be reset to the new

Maximum Full Scale Value by pressing Enter The display will automatically jump to the

Operating Range Menu allowing the user to enter a new Operating Range Value This can be

accomplished by performing the steps under Section 481 See Altitude Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Altitude

(0000)Ft

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Altitude

and pressing the Enter

button will calculate

new Min amp Max Op

Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Altitude Example-

Altitude

Accepted

(0100)Ft

32

Process Output Calibration 495

4951 Minimum Calibration

The Minimum Calibration Menu allows the user to make output zero adjustments Monitor the

output and with each Up or Down key depression the output will increase or decrease by

001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

4952 Span Calibration

The Span Calibration Menu allows the user to make output span adjustments Span adjustments

require a low pressure air source adjusted to the Full Scale Value shown on the side label

Monitor the output and with each Up or Down button depression the output will increase or

decrease by 001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

Probe Coefficient 496

The Probe Correction Coefficient Menu allows the user to modify the formula constant of

109670 used for non-amplified Pitot-type flow sensors

Tech Config

Password 1000

Output Calibration Correction Coeff

Correction Coeff Probe

4PT Flow Corr (109670)

MAC Address (00109670)

33

Four Point Flow Correction 497

The Four Point Flow Correction Menu allows the user to make corrections to the display and

output signal at 20 increments between 20 and 80 of the Operating Range Value entered

The Displayed Value is a fixed value determined by the percentage of Operating Range The

Measured Value is the value determined by an independent balancerrsquos reading

Tech Config

Password 1000

Output Calibration 80000 CFM Displayed Value

Correction Coeff 60000 CFM 80000

4PT Flow Corr 40000 CFM Measured Value

MAC Address 20000 CFM 79500

80000 CFM Displayed Value

60000 CFM 60000

40000 CFM Measured Value

20000 CFM 60500

80000 CFM Displayed Value

60000 CFM 40000

40000 CFM Measured Value

20000 CFM 40100

80000 CFM Displayed Value

60000 CFM 20000

40000 CFM Measured Value

20000 CFM 19500

MAC Address (BACnet Communication Option) 498

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network The default is 002 For

additional information refer to Section 411

Tech Config

Password 1000

Output Calibration MAC Address

Correction Coeff (Range = 02 to 254)

4PT Flow Corr

MAC Address (002)

34

Instance Number (BACnet Communication Option) 499

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The default is 1002 For

additional information refer to Section 411

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (Default = 1002)

Instance Number

Modbus ID (01002)

Modbus ID (Modbus Communication Option) 4910

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network The default is 002 For

communication with WattMaster Controls the Modbus ID has been set by the factory to 009 for

outside airflow applications For additional information refer to the Section 411

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

Baud Rate (BACnet amp Modbus Communication Options) 4911

The Baud Rate Menu allows the user to set a unique network baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate Modbus communications supports

96 192 384 576 and 1152 Kbps baud rate The default is 384 Kbps For communication

with WattMaster Controls the Baud Rate has been set by the factory to 96 Kbps For additional

information refer to Section 411

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

35

410 WARNING MESSAGES

Input Pressure Overrange Message 4101

If the input pressure exceeds the entered Operating Range Value the following message will

appear on the display It will alternate between the process display and the error message until

the input falls below the Operating Range Value

- Caution -

Input Beyond

Operating Range

Selected

Transducer Calibration Message 4102

If during a transducer zero or span calibration process the transducer output pressure value

measured exceeds plusmn20 of the expected value the following message will appear on the display

Once the Enter button is pressed the display returns to the previous calibration menu

Value entered is

Outside Factory

set limits

(Press Enter)

Operating Range Message 4103

If the new values entered for Temperature Compensation Area Factor or Altitude (see Sections

487 491 and 494) causes the Operating Range Value to exceed the new calculated

Maximum Full Scale Value the following message will appear on the display

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

New Operating Range Message 4104

If a user enters a new Operating Range Value the following message will appear on the display

notifying the user that if any 4 PT Flow Correction Values (see Section 497) were previously

entered they will be reset The message allows the user to confirm that the Operating Range

change should be made To complete the Operating Range change the user must use the

UPDown buttons to change the NO to a YES and press the ENTER button

Value will

Reset 4PT

Flow Correction

Values

Make the Change

(NO)

(Press Enter)

36

411 NETWORK COMMUNICATION

The AAON Airflow Signal Processor can be ordered with BACnet Modbus or LonWorks

Communication For BACnet Communication the AAON Airflow Signal Processors utilize

MSTP (Master SlaveToken Passing) BACnet type protocol BACnet is implemented using

EIA-485 signaling standards through a shielded twisted pair wire operating at a baud rate of 96

Kbps to 768 Kbps Each device has a unique MAC Address ranging from 2 to 127 Refer to

Section 4113 for BACnet Protocol Implementation Conformance Statements (PICS) For

Modbus Communication the AAON Airflow Signal Processors utilize the Modbus ndash RTU Slave

protocol using EIA-485 signaling standards through a shielded twisted pair wire operating at a

baud rate of 96 Kbps to 1152 Kbps Each device has a unique Modbus ID ranging from 1 to

254 Refer to Section 4114 for Modbus software configuration parameters For LonWorks

Communication each AAON Airflow Signal Processor has a unique Neuron Chip ID which is

loaded on the network by pressing a service switch located on the main board (see Section

4111 Figure 7) The LonWorks network utilizes a shielded twisted pair wire operating at a

fixed baud rate of 78 Kbps Refer to Section 4115 for LonWorks network variables

Sections 4111 and 4112 contain procedures for electrical connection of the AAON Airflow

Signal Processor to the network and for configuring the required communication parameters

Electrical Connection 4111

The following procedure outlines the steps for installing the interface wiring for network

communication Network wire should be low capacitance shielded 22 or 24 AWG twisted pair

with PVC jacket such as Belden Part numbers 9841 3105A or equivalent

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Verify that the Power Switch (S3) is in the OFF position and install the interface

wiring for Pins 9 and 10 as shown in Figure 7 If multiple AAON Airflow Signal

Processors will be connected to the same network see Figure 8 for connecting

multiple devices For network systems that require all devices to have a common

signal ground refer to Figure 9 for electrical connection The J2 electrical

connector has a removable terminal block for ease of installing the interface

wiring

Step 4 For proper operation of BACnet and Modbus communication networks the

device that is electrically installed at the end of the network may require the

Terminator Switch be moved to the ON position to prevent line and data

reflection If Terminator is required it must be applied to both physical ends of

the network All other devices should have the Terminator Switch in the OFF

position The communication board is located on the back side of the main

AAON Airflow Signal Processor board See Figure 10 below for Terminator

Switch location on the communication board

Step 5 For LonWorks Communication refer to Figure 7 for the location of the Lon

Service Pin

37

Step 6 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 7 Configure the required parameters as outlined in Section 4112

Step 8 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

RP1

S3

NETWORK

COMMUNICATION+

-

LON

SERVICE PIN

Figure 7 - Network Communication Electrical Connection

38

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

AAON AIRFLOW

SIGNAL PROCESSOR

CONNECT ONLY ONE END OF SHIELD

WIRE TO EARTH GROUND AS SHOWN

SET TERMINATOR SWITCH

ON IF REQUIRED

NETWORK

COMMUNICATIONS

NETWORK

CONNECT SHIELD

WIRES TOGETHER

CONNECT SHIELD

WIRES TOGETHER

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not

Requiring Common Signal Grounds

Note If using two conductor communication wire use the shield wire to connect all device signal grounds together as shown in the figure below If using three conductor communication wire use the 3rd conductor to connect all device signal grounds together and connect one side of the shield to earth ground

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

SIGNAL

GROUND

8

J2

SIGNAL

GROUND

8

J28

J2

USE SHIELD WIRE OR 3RD CONDUCTOR TO

CONNECT DEVICE SIGNAL GROUND TO

NETWORK SIGNAL GROUND

SET TERMINATOR SWITCH

ON IF REQUIRED

AAON AIRFLOW

SIGNAL PROCESSOR

NETWORK

COMMUNICATIONS

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

SIGNAL

GROUND

SIGNAL

GROUND

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds

39

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location

COMMUNICATION BOARD ID

BOARD SERIAL NO

40

Parameter Configuration 4112

If BACnet or Modbus communication is ordered the associated settings will need to be

configured with the exception of Modbus communication with WattMaster Controls which has

been configured at the factory To set the parameters refer to the following procedure below

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 41121

through 41124 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

41121 MAC Address (BACnet Communication Option)

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network Each AAON Airflow Signal

Processor must have a unique MAC Address assigned ranging from 2 to 127

Tech Config

Password 1000

4PT Flow Corr MAC Address

MAC Address (Range = 02 to 254)

Instance Number

Modbus ID (002)

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 2: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

TABLE OF CONTENTS

1 INTRODUCTION 5

11 DESCRIPTION 5

12 BASIC OPERATION 6

2 AIRFLOW STATION 7

21 SPECIFICATIONS 7

Material 7 211

Temperature 7 212

Humidity 7 213

Instrument Connections 7 214

22 MAINTENANCE 7

3 TEMPERATURE TRANSMITTER 8

31 SPECIFICATIONS 8

Supply Voltage 8 311

Combined Accuracy (Linearity Hysteresis and Repeatability) 8 312

Temperature Range 8 313

Output 8 314

32 DIMENSIONS 8

33 ELECTRICAL CONNECTION 8

4 AIRFLOW SIGNAL PROCESSOR 11

41 SPECIFICATIONS 11

Power Supply 11 411

Power Consumption 11 412

Accuracy 11 413

Temperature Input 11 414

Process Output Options 11 415

HighLow Alarm Relay Outputs 11 416

42 SAFETY 11

Electrical Connections 11 421

Static Electricity 11 422

43 DIMENSIONS 12

44 ELECTRICAL amp PNEUMATIC CONNECTIONS 12

45 INPUTOUTPUT SET-UP 15

Process Output 15 451

Temperature Input 15 452

46 ACTIVE DISPLAYS amp KEY FUNCTIONS 16

Power-up Initiation Display 16 461

Process Display Descriptions 16 462

Key Functions 17 463

47 DISPLAY MENUS 18

48 FIELD SETUP MENUS 18

Operating Range 19 481

Zero Pressure Calibration 19 482

Engineering Units 19 483

Lockdown 20 484

Flow Correction 21 485

AutoZero 21 486

Temperature Compensation 22 487

Display Filter 25 488

Process Output Filter 25 489

HighLow Alarm Option 26 4810

Factory Defaults 27 4811

49 TECH CONFIGURATION MENUS 28

Area Factor 28 491

Minimum Calibration 30 492

Span Calibration 30 493

Altitude 30 494

Process Output Calibration 32 495

Probe Coefficient 32 496

Four Point Flow Correction 33 497

MAC Address (BACnet Communication Option) 33 498

Instance Number (BACnet Communication Option) 34 499

Modbus ID (Modbus Communication Option) 34 4910

Baud Rate (BACnet amp Modbus Communication Options) 34 4911

410 WARNING MESSAGES 35

Input Pressure Overrange Message 35 4101

Transducer Calibration Message 35 4102

Operating Range Message 35 4103

New Operating Range Message 35 4104

411 NETWORK COMMUNICATION 36

Electrical Connection 36 4111

Parameter Configuration 40 4112

BACnet Protocol Implementation Conformance Statements 42 4113

Modbus Software Configuration Parameters 46 4114

LonWorks Network Variables 48 4115

412 TROUBLESHOOTING 51

Base Unit 51 4121

BACnet Communication Option 53 4122

Modbus Communication Option 55 4123

LonWorks Communication Option 56 4124

INDEX OF TABLES AND FIGURES

Table 1 - Process Output Switch Configuration 15

Table 2 - Temperature Input Switch Configuration 15

Table 3 - Process Display Descriptions 16

Table 4 - Key Functions 17

Table 5 - Display Menus 18

Table 6 - Engineering Units 20

Table 7 - Factory Defaults 27

Table 8 - BACNET Protocol Implementation Conformance Statements 43

Table 9 - Standard Object Types Supported 44

Table 10 - Multistate Value 5 Engineering Units State_Textlist 45

Table 11 -MODBUS Software Configuration Parameters 46

Table 12 - MODBUS Device Objects 47

Table 13 -Engineering Unit Data Value Descriptions 48

Table 14 -MODBUS Exception Codes 48

Table 15 -Identification Of LONWORKS Module 48

Table 16 -LONWORKS Network Variables 49

Table 17 - Network Variable Types 50

Table 18 - Configuration Property 50

Table 19 -Base Unit Troubleshooting Table 51

Table 20 -BACNET Communication Troubleshooting Table 53

Table 21 -MODBUS Communication Troubleshooting Table 55

Table 22 - LONWORKS Communication Troubleshooting Table 56

Figure 1 - Electrical Connections 9

Figure 2 - Temperature Transmitter Positive amp Negative Connectors 10

Figure 3 - Electrical Connections 13

Figure 4 - Electrical Connection with Wattmaster Controls 14

Figure 5 - Pneumatic Connections 15

Figure 6 - Key Functions 17

Figure 7 - Network Communication Electrical Connection 37

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not Requiring

Common Signal Grounds 38

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds 38

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location 39

5

1 INTRODUCTION

11 DESCRIPTION

The AAON Outdoor Airflow Measurement System includes an airflow station airflow signal

processor and temperature transmitter and is capable of producing an overall plusmn05 accuracy

through the velocity range of 200 to 1200 fpm and plusmn5 accuracy at 100 fpm

The airflow station consists of multiple airflow elements factory mounted in the air handling

unit and pre-piped to the airflow signal processor Optional inlet bells are used for high turn

down or low velocity applications Standard materials consist of a G90 galvanized casing and

6063-T5 anodized aluminum flow sensors suitable for most HVAC applications The airflow

averaging elements are head type devices which generate a differential (velocity) pressure signal

similar to the orifice venturi and other head producing primary elements The airflow station is

constructed so as to comply with ASHRAE Standard 111 for equal area traversing of an airflow

measurement plane Multiple elements are manifolded together for connection to the airflow

signal processor

The airflow signal processor utilizes current state-of-the-art digital microprocessor technology

capable of producing unequaled 24-bit (16777216 steps) AD and 12 bit (4096 steps) DA

signal conversion resolution The ultra-low operating range and auto zeroing function of the

airflow signal processor provides accurate airflow measurement down to 100 fpm The signal

processor accepts a temperature input signal for air temperature indication temperature signal

transmission for remote readout and air density compensation for standard or actual airflow

calculations A password protected configuration menu provides quick and simple field

configuration by authorized personnel Field configuration of engineering units process noise

filtering operating range alarm set points etc are performed via user friendly menus and a six

button touch pad Device monitoring and configuration can also be performed by a building

management system through an optional LonWorksreg BACnetreg-MSTP Master or Modbusreg

Slave communication network Optional features also include HighLow Remote Alarms

A temperature transmitter with 4-20mA output and temperature range of -30 to 130degF is included

in the installation to provide a temperature input signal to the airflow signal processor for air

density calculations

6

12 BASIC OPERATION

The airflow station produces pneumatic output signals referred to as total (high) and static (low)

pressure These two pressures are piped to the airflow signal processor where the static pressure

is subtracted from the total and the result indicated as velocity pressure (differential pressure)

This measured differential pressure is equal to the average velocity of the air stream moving

through the plane that the airflow station is located in This signal can be converted to air

velocity and flow using the following equations

a

aT

460

921293251

a

VPV

71096

AVQ

Where

a Actual density of air in lbft3 (0075 lbft

3 at sea level and 68degF)

aT = Actual temperature in degF (default value is 68degF)

PV = Velocity pressure in inches H2O

V = Velocity in fpm

Q = Flow in cfm

A = Area in ft2

This signal is scaled and linearized before being displayed and transmitted out as a 4-20mA 0-

5VDC or 0-10VDC signal

The AutoZero feature corrects any zero offset caused by large ambient temperature changes

The Temperature Compensation feature compensates the flow signal for density changes caused

by variations in the air temperature

7

2 AIRFLOW STATION

21 SPECIFICATIONS

Material 211

Elements - 6063-T5 anodized aluminum

Casings - 16 ga G90 galvanized steel

Temperature 212

350F continuous operation (in air)

400F intermittent operation (in air)

Humidity 213

0 to 100 non-condensing

Instrument Connections 214

frac14rdquo compression suitable for use with thermoplastic or copper tubing thermoplastic tubing

requires the use of tubing inserts

22 MAINTENANCE

Since the sensing elements have no moving parts only periodic cleaning may be required The

sensing elements should be inspected for fouling of the sensing holes as part of an annual

preventative maintenance program Installations having viscous airborne particles may require

more frequent inspection If the sensing holes on the elements have become fouled or plugged

the following procedure is recommended Although the sensing elements are not fragile by

design care must be taken not to damage or disfigure the cylinder surface when handling

Particular attention must be given to the surface areas in which sensing ports are located

Caution prior to performing the following cleaning procedure the AAON Airflow Signal

Processor must be isolated by disconnect the Total (High) and Static (Low) Pressure

connections on the AAON Airflow Station

- Backpurging Connect cleandry compressed air set at a maximum pressure of 25

psi to the output pressure ports (total andor static) of the sensing element being

cleaned While purging the sensing element wipe the surface of the cylinder with a

cloth or brush to loosen and remove all contaminant buildup

- Cleaning In applications where the sensing elements are subject to viscous

contaminants it is recommended that the surface be washed with a cleaning agent

The cleaning agent used must be suitable for use on aluminum

8

3 TEMPERATURE TRANSMITTER

31 SPECIFICATIONS

Supply Voltage 311

85 to 32VDC

Combined Accuracy (Linearity Hysteresis and Repeatability) 312

plusmn020 of full scale

Temperature Range 313

-30degF to 130degF

Output 314

4-20mA

32 DIMENSIONS

TEMPERATURETRANSMITTER

Model ATT-1

AAON PN V28580

255

370

222

PG1116KNOCKOUT(TYP OF 6)

325

725(STANDARD)

reg

33 ELECTRICAL CONNECTION

All electrical connections from the AAON Temperature Transmitter to the AAON Airflow

Signal Processor have been made at the factory as shown in Figure 1 below Figure 2 shows the

AAON Temperature Transmitter positive and negative connector locations The following

procedure outlines the steps for checking the interface wiring if required

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

9

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor and

the AAON Temperature Transmitter cover by turning each screw counter

clockwise

Step 2 Remove the covers

Step 3 Verify that the Power Switch (S3) on the AAON Airflow Signal Processor is in

the OFF position

Step 4 Confirm the installation of the interface wiring for Pins 4 and 5 on the AAON

Airflow Signal Processor are connected to the positive and negative connectors on

the AAON Temperature Transmitter as shown in Figures 1 and 2 The three

electrical connectors (J1 J2 and optional J3) on the AAON Airflow Signal

Processor have removable terminal blocks for ease of installing the interface

wiring

Step 5 Verify that the Temp Input Switch (S1) on the AAON Airflow Signal Processor is

set to the mA position

Step 6 Turn the Power Switch (S3) on the AAON Airflow Signal Processor to the ON

position see Section 461 and 462 for display descriptions

Step 7 Replace the covers by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

(4-20mA LOOP

POWERED)+

- TRANSMITTER

S1S2 S4

+ 24VDC OUTPUT POWER

- TEMPERATURE INPUT(GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATIONS

- NETWORK COMMUNICATIONS

- PROCESS OUTPUT(GND)

+ PROCESS OUTPUT

8

10

9

4

6

7

5

J2

TEMPERATURE

S1 SET TO

mA POSITION

Figure 1 - Electrical Connections

10

+-

4-2

0m

A C

urre

nt L

oop

BACK SIDE OF COVER

RTD CONNECTION

Figure 2 - Temperature Transmitter Positive amp Negative Connectors

11

4 AIRFLOW SIGNAL PROCESSOR

41 SPECIFICATIONS

Power Supply 411

20 to 28 VACDC

Power Consumption 412

250mA at 24VAC

175mA at 24VDC

Accuracy 413

plusmn025 full scale

Temperature Input 414

4-20mA

Process Output Options 415

0-5VDC

0-10VDC

4-20mA (700Ω maximum load)

HighLow Alarm Relay Outputs 416

Two single (1 form C) dry contacts rated for

5 amps at 30VACDC

10 amps at 120VAC

42 SAFETY

Electrical Connections 421

Before any electrical connections are made ensure the POWER SWITCH is in the OFF

position

Static Electricity 422

The circuit board contains components which are susceptible to damage caused by static

electrical discharge Should it be necessary to remove the circuit board from the enclosure

appropriate precautions must first be taken to ensure that the operator and the circuit board are at

the same electrical potential

12

43 DIMENSIONS

100000ACFM

75 F

J1 J2

TOTALCONNECTION

STATICCONNECTION

462

5785

2265

350

525

Air Fl o wS IGN AL PROCES S OR

AAON

44 ELECTRICAL amp PNEUMATIC CONNECTIONS

All electrical and pneumatic connections to the AAON Airflow Signal Processor have been

made at the factory as shown in Figures 3 through 5 below with the exception of the electrical

connection for the HighLow Alarm Option if ordered and for network communication options

other than with WattMaster Controls The following procedure outlines the steps for turning

ON the AAON Airflow Signal Processor if network communication is required see Section

411 prior to turning ON the AAON Airflow Signal Processor

Caution ndash If electrical connections need to be rewired all electrical connections must be made

with the AAON Airflow Signal Processor Power Switch in the OFF position The three

electrical connectors (J1 J2 and optional J3) have removable terminal blocks for ease of

installing the interface wiring

13

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 4 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

(24VACDC)

POWER SUPPLY

ANALOG RECEIVING DEVICE

PROCESS OUTPUT

S1S2 S4

+

-

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

SWITCH POSITIONS

SHOWN IN BLACK

S1 POSITION

INDICATING 4-20mA

TEMPERATURE INPUT

S2 AND S4 POSITIONS

INDICATING 0-10VDC

PROCESS OUTPUT

RP1

S3

AAON

TEMPERATURE

TRANSMITTER

(4-20mA LOOP POWERED)+

-

Figure 3 - Electrical Connections

14

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROCOUTPUT

mA

V

10V

5V

(24VACDC)

POWER SUPPLY

ANALOG RECEIVING DEVICE

PROCESS OUTPUT

S1S2 S4

+

-

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

SWITCH POSITIONS

SHOWN IN BLACK

S1 POSITION

INDICATING 4-20mA

TEMPERATURE INPUT

S2 AND S4 POSITIONS

INDICATING 0-10VDC

PROCESS OUTPUT

RP1

S3

E-BUS DISTRIBUTION MODULE

+-

AAON

TEMPERATURE

TRANSMITTER

(4-20mA LOOP POWERED)+

-

- COMM

+ COMM

GND

THE SHIELDING WIRE SHOULD BE USED TO

CONNECT WATTMASTER GROUND TO AIRFLOW

SIGNAL PROCESSOR GROUND

Figure 4 - Electrical Connection with Wattmaster Controls

15

J1 J2

TOTAL

CONNECTION

STATIC

CONNECTION

TOTAL PRESSURE CONECTION

AAON AIRFLOW STATION

STATIC PRESSURE CONNECTION

AAON AIRFLOW STATION

Figure 5 - Pneumatic Connections

45 INPUTOUTPUT SET-UP

If input or output configuration changes are required refer to the Tables 1 and 2 in the sections

below and Figure 3 in Section 44

Process Output 451

If controls are provided by AAON the process output has been set by the factory for input to the

specific controller otherwise the default is 0-10VDC To change the output configuration set

the S2 amp S4 switches as follows

Table 1 - Process Output Switch Configuration

Process Output Range S2 S4

Current 4-20mA NA mA

Voltage 0-10VDC 10V V

Voltage 0-5VDC 5V V

Temperature Input 452

Since the AAON Temperature Transmitter has been provided the temperature input has been set

by the factory for 4-20mA To change the input configuration set the S1 switch as follows

Table 2 - Temperature Input Switch

Configuration

Temperature Input S1 Switch Selection

4-20mA mA

0-10VDC V

16

46 ACTIVE DISPLAYS amp KEY FUNCTIONS

Power-up Initiation Display 461

Upon initial power-up Software Revision information will be displayed on the graphic display

for approximately 5 seconds

EQ-1

Software Rev XXXXX

Modbus Rev XXXXX

Process Display Descriptions 462

After power-up initialization the following information will appear on the graphic display

depending upon the options purchased

75˚F

75˚F

75˚F

000000

000000

000000

AutoZero

ACFM

High Alarm

ACFM

Low Alarm

ACFM

Flow Monitoring with an

Auto Zero Cycle

Flow Monitoring with a

High Alarm Condition

Flow Monitoring with a

Low Alarm Condition

Table 3 - Process Display Descriptions

Number Description

1 Process value

2 Air Flow temperature units in degree F or C

3 Flashing Asterisk indicates the CPU is functioning

4 Engineering units

5 Displayed during an AutoZero cycle

6 Indicating High Alarm Value has been exceeded (HighLow Alarm Option)

7 Indicating Low Alarm Value has been exceeded (HighLow Alarm Option)

12 3

4

6

7 5

17

Key Functions 463

The following figure and description identify the function of each Key

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

2

13

4

567

8

RP1 9

Figure 6 - Key Functions

Table 4 - Key Functions

Number Description

1 Enter Key - Allows a user to enter into the Field Menu enter into a selected menu item

or store into memory changes made to the program

2 Up Key - Allows the user to scroll up in the menu list to a selected item or increase digits

when making value changes

3 Right Key - When making changes to user values the Right Key allows the user to scroll

to the correct digit for changes

4 Down Key - Allows the user to scroll down in the menu list to a selected item or

decrease digits when making value changes

5 Left Key - When making changes to user values the Left Key allows the user to scroll to

the correct digit for changes

6

Escape Key - The Escape Key allows the user to back out of the menu to the Active

Display If a user starts to make a change and decides to cancel the change the Escape

Key will allow the user to return to the Active Display without making the change

7 Power Switch ndash Allows a user to turn power off to the AAON Signal Processor during

field wiring or modifications to the device

8 Lon Switch ndash Allows a user to send a unique Neuron device ID when connecting to a

LonWorks communication network

9 RP1 ndash Allows a user to adjust the display contrast

18

47 DISPLAY MENUS

Table 5 shows the Field Setup and Tech Configuration Menus The display will vary depending

upon the options purchased

Table 5 - Display Menus

Field Setup Menu

(Press ENTER Key)

Tech Configuration Menu

(Press UPDOWN Keys simultaneously)

(Enter Password number 1000)

(Press ENTER Key)

Operating Range Area Factor

Zero Calibration Min Calibration

Eng Units Span Calibration

Lockdown Temp Fixed Value

Flow Correction Altitude

AutoZero Output Calibration

Temp Comp Correction Coeff

Display Filter 4PT Flow Corr

Output Filter MAC Address (Optional)

Alarm Options (Optional) Instance Number (Optional)

Factory Defaults Modbus ID (Optional)

Baud Rate (Optional)

48 FIELD SETUP MENUS

To set parameters under the Field Setup Menus refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Field Setup Menu by depressing and holding the Enter Key for 5

seconds

Step 2 Once in the Field Setup Menu use the UpDown Keys to highlight the

required parameter for configuration as shown in Sections 481 through

4811 Press the Enter Key once to access the highlighted parameter

Menu

Step 3 Once in the parameter menu the parameter can be changed using

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Field

Setup Menu

Step 4 After all of the required parameters have been configured exit the Field

Setup Menu by pressing the ESC Key The Process Display (see Section

462) will then be displayed

19

Operating Range 481

The Operating Range allows the user to enter a value which will represent 100 of the process

output signal (5VDC 10VDC or 20mA) The Operating Range Value has been set by the

factory to equal 110 of the design supply flow rate unless this value is less than the Minimum

Full Scale Value allowed for the AAON Airflow Signal Processor The menu will display the

Minimum Full Scale Value allowed which is then entered as the Operating Range

Field Setup

Menu

Operating Range Operating Range

Zero Calibration ( ACFM )

Engineering Units (6000-12000)

Lockdown (010000)

Zero Pressure Calibration 482

The Zero Calibration Menu allows the user to perform a zero transducer calibration to eliminate

any transducer zero shift

(Caution Before performing a zero calibration disconnect the Total (High) and Static (Low)

pressure connections perform a zero calibration and then reconnect the Total and Static

pressure connections)

Field Setup

Menu

Operating Range Input Value CPU Taking

Zero Calibration (0000) Inch wc Samples

Engineering Units

Lockdown (Press Enter) (Please Wait)

Engineering Units 483

Table 6 lists the engineering units that are available for the user to select from for display

purposes Changing the engineering units will affect the process display and the alarm value

menus The default setting is ACFM

Field Setup

Menu

Operating Range Eng Units

Zero Calibration

Engineering Units (ACFM)

Lockdown

20

Table 6 - Engineering Units

Standard

Flow

Units

Actual

Flow

Units

SCFM ACFM

SCFH LS

SLS Am3S

Sm3S Am3M

Sm3M Am3HR

Sm3HR

Lockdown 484

Due to the high square root gain associated with very low delta p values the display and process

output are locked to a zero value until the input value reaches the specified Lockdown Value that

was entered Above the Lockdown Value the output is linear to air flow

4841 Lockdown Value

The Lockdown Value can be changed from 0 to 20 of Operating Range Value Lockdown

Values can be changed in 1 increments The recommended standard is 5

Field Setup

Menu

Operating Range Lockdown (0-20)

Zero Calibration (5)

Engineering Units Delay (0-20 sec)

Lockdown (2) Sec

4842 Lockdown Delay

The Lockdown Delay Menu allows the user to enter a lockdown time delay (0-20 seconds) that

will delay the display and output lockdown from occurring until the flow value or output value

has remained below the lockdown value for that duration

Field Setup

Menu

Operating Range Lockdown (0-20)

Zero Calibration (5)

Engineering Units Delay (0-20 sec)

Lockdown (2) Sec

21

Flow Correction 485

The Flow Correction Menu was incorporated into the AAON Airflow Signal Processor to give

the user an easy way to make corrections to the display and output without changing the

Operating Range Value entered by the factory or user The Flow Correction Menu would be

used to correct for a constant error from zero to the entered Operating Range Value

4851 Flow Correction (K-Factor)

If the user knows the change required to match the balancers reading select the K-Factor

Menu and enter this value for the K-Factor The minimum and maximum allowable K-Factor

Value is displayed in the K-Factor Menu

Field Setup

Menu

Flow Correction Flow Correction

AutoZero K-Factor K-Factor Range

Temp Comp (085 13)

Display Filter K-Factor Calc K=(01000)

4852 Flow Correction (K-Factor Calculator)

If the new K-factor Value needs to be calculated select the K-Factor Calc Menu Enter the

Displayed Value on the AAON Airflow Signal Processor and actual Measured Value press

Enter and the change will be calculated and stored as the new K-Factor Value

Field Setup

Menu

Flow Correction Displayed Value

AutoZero K-Factor (000000)

Temp Comp Measured Value

Display Filter K-Factor Calc (000000)

-FLOW CORRECTION EXAMPLE-

The balancer is consistently measuring a value of 9500 CFM which is 500 CFM less than the

10000 CFM value on the AAON Airflow Signal Processor display The user would then

perform the following math function Measured Value Displayed Value = K-Factor so 9500

CFM 10000 CFM = 0950 The user would enter 0950 for the K-Factor Flow Correction If

the K-Factor Calculator is used the K- Factor Flow Correction would automatically update the K

Factor

AutoZero 486

The AutoZero feature corrects any zero offset caused by large ambient temperature changes

22

4861 AutoZero Status

The AutoZero Status Menu allows the user to turn the AutoZero function ON or OFF

Field Setup

Menu

Flow Correction AZ Status AZ Status

AutoZero AZ Interval (ONOFF)

Temp Comp AZ Test Interval

Display Filter (ON)

4862 AutoZero Interval

The AutoZero Interval Menu allows the user to select the AutoZero Interval from once an hour

to once a day in 1 hour increments Use the UPDOWN keys to select the interval value Upon

device power up an AutoZero cycle will occur after 20 seconds

Field Setup

Menu

Flow Correction AZ Status AZ Interval

AutoZero AZ Interval (1 TO 24HR)

Temp Comp AZ Test Interval

Display Filter (01)HR

4863 AutoZero Test Interval

For troubleshooting or testing the AutoZero function the AutoZero Test Interval Menu allows

the user to select an Auto Zero test frequency of once a minute to once every 30 minutes in 1

minute increments Use the UPDOWN keys to select the interval value If AutoZero Test

Interval is turned ON for more than 60 minutes it will automatically default to OFF and the

AutoZero Interval (see Section 4862) will be reactivated

Field Setup

Menu

Flow Correction AZ Status AZ Test Interval

AutoZero AZ Interval (OFF)

Temp Comp AZ Test Interval Interval

Display Filter (1)Min

Temperature Compensation 487

The Temperature Compensation option compensates the flow and velocity signal for density

changes caused by variations in the process air temperature An input signal from AAON

Temperature Transmitter is required see Section 33 for proper temperature transmitter

connection and Section 452 for temperature input signal configuration

23

4871 Temperature Units

The Temperature Units Menu allows the user to select the appropriate temperature units for the

job The default setting is ordmF

Field Setup

Menu

Flow Correction Temperature Units Units

AutoZero Temperature Values (ordmF ordmC)

Temp Comp Temperature Input

Display Filter Fixed Value (ordmF)

4872 Temperature Values

The Temperature Values Menu allows the factory or user to set the minimum and maximum

temperature range values that represent the input signal from the external temperature transmitter

or the building automation system Since the AAON Temperature Transmitter has been supplied

the minimum and maximum temperature range values of -30degF to 130degF have been

preprogramed

Field Setup

Menu

Flow Correction Temperature Units Minimum Value

AutoZero Temperature Values (-030)

Temp Comp Temperature Input Maximum Value

Display Filter Fixed Value (130)

If the temperature values are changed from the factory settings and the new temperature values

cause the existing Operating Range Value to be outside the new calculated Minimum or

Maximum Full Scale Value the below Warning Message will appear and the Operating Range

will be reset to the new Maximum Full Scale Value by pressing Enter The display will

automatically jump to the Operating Range Menu allowing the user to enter a new Operating

Range Value This can be accomplished by performing the steps under Section 481 See

Temperature Range Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

24

Minimum Value

(-000)

Maximum Value

(000)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Min amp

Max Temperature

value and pressing the

Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Temperature Range Example-

Minimum Value

(-000)

Accepted

(100)

4873 Temperature Input

The Temperature Input Menu allows the user to select between three temperature input options

(Fixed Variable and Network) for the flow calculations Since the AAON Temperature

Transmitter has been supplied Variable has been selected If Fixed is selected the default

temperature value entered in the Fixed Value Menu (see Section 4874) is used If Net is

selected the temperature input signal is obtained through network communications The Net

option is only available if one of the communication options is ordered The temperature value

is only displayed on the LCD screen if the Temperature Input is set to Variable or Network

Field Setup

Menu

Flow Correction Temperature Units Temp Input

AutoZero Temperature Values (FixVarNet)

Temp Comp Temperature Input

Display Filter Fixed Value (Variable)

25

4874 Fixed Value

The Fixed Value Menu allows the user to enter a temperature value for the flow calculations

This value will not be displayed on the LCD screen

Field Setup

Menu

Flow Correction Temperature Units Fixed Value

AutoZero Temperature Values (˚F)

Temp Comp Temperature Input

Display Filter Fixed Value (+068)

Display Filter 488

The Display Filter Menu allows the user to adjust the Display Filter rolling average algorithm by

setting the Sample Interval Time value in seconds and the number of rolling average Sample

Counts The adjustment range of the Sample Interval Time is 010 to 655 seconds in 010

increments The Sample Count range is 0 to 150 Sample Counts The Display Filter is

independent of the Process Output Filter Value (See Section 489)

Field Setup

Menu

Flow Correction Sample Interval Time

AutoZero (005)sec

Temp Comp (0-150) Sample Count

Display Filter (010)

Process Output Filter 489

The Process Output Filter Menu allows the user to adjust the Process Output Filters rolling

average algorithm by setting the Sample Interval Time value in seconds and the number of

rolling average Sample Counts The adjustment range of the Sample Interval Time is 010 to

655 seconds in 010 increments The Sample Count range is 0 to 150 Sample Counts The

Process Output Filter is independent of the Display Filter Value (See Section 488)

Field Setup

Menu

Output Filter Sample Interval Time

Alarm Options (005)sec

Factory Defaults (0-150) Sample Count

(010)

26

HighLow Alarm Option 4810

The following menus for configuration of HighLow Alarms are only available if the HighLow

Alarm option is purchased

48101 Alarm Status

The Alarm Status allows the user to independently turn each alarm ON or OFF

Field Setup

Menu

Output Filter Alarm Status Low Alarm

Alarm Options Alarm Value (On)

Factory Defaults Alarm Delay High Alarm

(On)

48102 Alarm Values

The Alarm Value Menu allows the user to enter the Low or the High flow alarm value Alarm

values will be displayed in the same engineering units selected in the Eng Units Menu (see

Section 483)

- High Alarm Function The High Alarm activates if the flow exceeds the High Alarm

value and resets when the flow drops below the High Alarm Value

- Low Alarm Function The Low Alarm activates if the flow drops below the Low

Alarm Value and resets when the flow exceeds the Low Alarm Value

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Value

Alarm Options Alarm Value (000000)

Factory Defaults Alarm Delay Hi Alarm Value

(100000)

48103 Alarm Delay

The Alarm Delay Menu allows the user to enter an alarm delay of 0 to 999 seconds before an

alarm will be activated The alarm will be reset without a delay

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Delay

Alarm Options Alarm Value (000)Seconds

Factory Defaults Alarm Delay Hi Alarm Delay

(000)Seconds

27

Factory Defaults 4811

If parameter configuration changes have been made incorrectly to the AAON Airflow Signal

Processor all device settings can be restored to the original AAON factory settings by selecting

YES and pressing Enter in both the Set To Factory Defaults Menu and the Verify Set To Factory

Defaults Menu (see Table 7 below for a list of Saved Settings)

Field Setup

Menu

Output Filter Set To Verify Set To

Alarm Options Factory Defaults Factory Defaults

Factory Defaults

(No) (No)

Table 7 - Factory Defaults

Item Saved Setting Item Saved Setting

1 All Factory Calibration Points (12) 14 MAC Address

2 Area Factor 15 Instance Number

3 Operating Range 16 Engineering Units

4 4 Pt Flow Correction 17 Display Filter Values

5 Altitude 18 Output Filter

6 K-Factor 19 DP Display Format

7 Lockdown amp Delay Values 20 Output Calibration

8 Flow Correction 21 AutoZero Status

9 Flow Coefficient 22 AutoZero Interval

10 Min amp Max Temp Range Values 23 Temp Units

11 Alarm Status 24 Temp Input

12 Alarm Values 25 Temp Fixed Value

13 Alarm Delay 26 Baud Rate

28

49 TECH CONFIGURATION MENUS

To set parameters under the Tech Configuration Menu refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 491

through 4911 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

Area Factor 491

To convert the differential pressure signal from the AAON Airflow Station to a flow value the

Area Factor associated with the AAON Airflow Station has been preprogramed by the factory

If the Area Factor needs to be checked or reconfigured the correct Area Factor for the AAON

Airflow Station can be found on the AAON Airflow Station product label installed in the air

handling unit

Tech Config

Password 1000

Area Factor Area Factor

Min Calibration (FT2)

Span Calibration

Altitude (001000)

29

If the Area Factor is reconfigured and the new Area Factor causes the existing Operating Range

Value to be outside the new calculated Minimum or Maximum Full Scale Value the below

Warning Message will appear and the Operating Range will be reset to the new Maximum Full

Scale Value by pressing Enter The display will automatically jump to the Operating Range

Menu allowing the user to enter a new Operating Range Value This can be accomplished by

performing the steps under Section 481 See Area Factor Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Area Factor

(FT )

(001000)

Area Factor

(FT )

Accepted

(001200)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Area

Factor and pressing

the Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Area Factor Example-

2

2

30

Minimum Calibration 492

The Minimum Calibration Menu allows a user to perform a minimum transducer calibration

This value will be placed in a different memory location and used until a Return to Factory

Defaults is selected (see Section 4811)

(Caution Before performing a minimum calibration disconnect the Total (High) and Static

(Low) Pressure connections perform a minimum calibration and then reconnect the Total

and Static Pressure connections)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00000) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Span Calibration 493

The Span Calibration Menu allows the user to perform a span transducer calibration to eliminate

any possible transducer drift This value will be placed in a different memory location than the

Factory Span memory location and used until a Return to Factory Defaults is selected (see

Section 4811)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00570) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Altitude 494

The Altitude Menu allows the user to enter the specific altitude for the job for the density

calculations the job specific site Altitude has been preprogramed by the factory

Tech Config

Password 1000

Area Factor Altitude

Min Calibration

Span Calibration (0000)Ft

Altitude

31

If the Altitude is changed from the factory setting and the new Altitude causes the existing

Operating Range Value to be outside the new calculated Minimum or Maximum Full Scale

Value the below Warning Message will appear and the Operating Range will be reset to the new

Maximum Full Scale Value by pressing Enter The display will automatically jump to the

Operating Range Menu allowing the user to enter a new Operating Range Value This can be

accomplished by performing the steps under Section 481 See Altitude Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Altitude

(0000)Ft

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Altitude

and pressing the Enter

button will calculate

new Min amp Max Op

Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Altitude Example-

Altitude

Accepted

(0100)Ft

32

Process Output Calibration 495

4951 Minimum Calibration

The Minimum Calibration Menu allows the user to make output zero adjustments Monitor the

output and with each Up or Down key depression the output will increase or decrease by

001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

4952 Span Calibration

The Span Calibration Menu allows the user to make output span adjustments Span adjustments

require a low pressure air source adjusted to the Full Scale Value shown on the side label

Monitor the output and with each Up or Down button depression the output will increase or

decrease by 001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

Probe Coefficient 496

The Probe Correction Coefficient Menu allows the user to modify the formula constant of

109670 used for non-amplified Pitot-type flow sensors

Tech Config

Password 1000

Output Calibration Correction Coeff

Correction Coeff Probe

4PT Flow Corr (109670)

MAC Address (00109670)

33

Four Point Flow Correction 497

The Four Point Flow Correction Menu allows the user to make corrections to the display and

output signal at 20 increments between 20 and 80 of the Operating Range Value entered

The Displayed Value is a fixed value determined by the percentage of Operating Range The

Measured Value is the value determined by an independent balancerrsquos reading

Tech Config

Password 1000

Output Calibration 80000 CFM Displayed Value

Correction Coeff 60000 CFM 80000

4PT Flow Corr 40000 CFM Measured Value

MAC Address 20000 CFM 79500

80000 CFM Displayed Value

60000 CFM 60000

40000 CFM Measured Value

20000 CFM 60500

80000 CFM Displayed Value

60000 CFM 40000

40000 CFM Measured Value

20000 CFM 40100

80000 CFM Displayed Value

60000 CFM 20000

40000 CFM Measured Value

20000 CFM 19500

MAC Address (BACnet Communication Option) 498

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network The default is 002 For

additional information refer to Section 411

Tech Config

Password 1000

Output Calibration MAC Address

Correction Coeff (Range = 02 to 254)

4PT Flow Corr

MAC Address (002)

34

Instance Number (BACnet Communication Option) 499

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The default is 1002 For

additional information refer to Section 411

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (Default = 1002)

Instance Number

Modbus ID (01002)

Modbus ID (Modbus Communication Option) 4910

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network The default is 002 For

communication with WattMaster Controls the Modbus ID has been set by the factory to 009 for

outside airflow applications For additional information refer to the Section 411

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

Baud Rate (BACnet amp Modbus Communication Options) 4911

The Baud Rate Menu allows the user to set a unique network baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate Modbus communications supports

96 192 384 576 and 1152 Kbps baud rate The default is 384 Kbps For communication

with WattMaster Controls the Baud Rate has been set by the factory to 96 Kbps For additional

information refer to Section 411

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

35

410 WARNING MESSAGES

Input Pressure Overrange Message 4101

If the input pressure exceeds the entered Operating Range Value the following message will

appear on the display It will alternate between the process display and the error message until

the input falls below the Operating Range Value

- Caution -

Input Beyond

Operating Range

Selected

Transducer Calibration Message 4102

If during a transducer zero or span calibration process the transducer output pressure value

measured exceeds plusmn20 of the expected value the following message will appear on the display

Once the Enter button is pressed the display returns to the previous calibration menu

Value entered is

Outside Factory

set limits

(Press Enter)

Operating Range Message 4103

If the new values entered for Temperature Compensation Area Factor or Altitude (see Sections

487 491 and 494) causes the Operating Range Value to exceed the new calculated

Maximum Full Scale Value the following message will appear on the display

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

New Operating Range Message 4104

If a user enters a new Operating Range Value the following message will appear on the display

notifying the user that if any 4 PT Flow Correction Values (see Section 497) were previously

entered they will be reset The message allows the user to confirm that the Operating Range

change should be made To complete the Operating Range change the user must use the

UPDown buttons to change the NO to a YES and press the ENTER button

Value will

Reset 4PT

Flow Correction

Values

Make the Change

(NO)

(Press Enter)

36

411 NETWORK COMMUNICATION

The AAON Airflow Signal Processor can be ordered with BACnet Modbus or LonWorks

Communication For BACnet Communication the AAON Airflow Signal Processors utilize

MSTP (Master SlaveToken Passing) BACnet type protocol BACnet is implemented using

EIA-485 signaling standards through a shielded twisted pair wire operating at a baud rate of 96

Kbps to 768 Kbps Each device has a unique MAC Address ranging from 2 to 127 Refer to

Section 4113 for BACnet Protocol Implementation Conformance Statements (PICS) For

Modbus Communication the AAON Airflow Signal Processors utilize the Modbus ndash RTU Slave

protocol using EIA-485 signaling standards through a shielded twisted pair wire operating at a

baud rate of 96 Kbps to 1152 Kbps Each device has a unique Modbus ID ranging from 1 to

254 Refer to Section 4114 for Modbus software configuration parameters For LonWorks

Communication each AAON Airflow Signal Processor has a unique Neuron Chip ID which is

loaded on the network by pressing a service switch located on the main board (see Section

4111 Figure 7) The LonWorks network utilizes a shielded twisted pair wire operating at a

fixed baud rate of 78 Kbps Refer to Section 4115 for LonWorks network variables

Sections 4111 and 4112 contain procedures for electrical connection of the AAON Airflow

Signal Processor to the network and for configuring the required communication parameters

Electrical Connection 4111

The following procedure outlines the steps for installing the interface wiring for network

communication Network wire should be low capacitance shielded 22 or 24 AWG twisted pair

with PVC jacket such as Belden Part numbers 9841 3105A or equivalent

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Verify that the Power Switch (S3) is in the OFF position and install the interface

wiring for Pins 9 and 10 as shown in Figure 7 If multiple AAON Airflow Signal

Processors will be connected to the same network see Figure 8 for connecting

multiple devices For network systems that require all devices to have a common

signal ground refer to Figure 9 for electrical connection The J2 electrical

connector has a removable terminal block for ease of installing the interface

wiring

Step 4 For proper operation of BACnet and Modbus communication networks the

device that is electrically installed at the end of the network may require the

Terminator Switch be moved to the ON position to prevent line and data

reflection If Terminator is required it must be applied to both physical ends of

the network All other devices should have the Terminator Switch in the OFF

position The communication board is located on the back side of the main

AAON Airflow Signal Processor board See Figure 10 below for Terminator

Switch location on the communication board

Step 5 For LonWorks Communication refer to Figure 7 for the location of the Lon

Service Pin

37

Step 6 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 7 Configure the required parameters as outlined in Section 4112

Step 8 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

RP1

S3

NETWORK

COMMUNICATION+

-

LON

SERVICE PIN

Figure 7 - Network Communication Electrical Connection

38

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

AAON AIRFLOW

SIGNAL PROCESSOR

CONNECT ONLY ONE END OF SHIELD

WIRE TO EARTH GROUND AS SHOWN

SET TERMINATOR SWITCH

ON IF REQUIRED

NETWORK

COMMUNICATIONS

NETWORK

CONNECT SHIELD

WIRES TOGETHER

CONNECT SHIELD

WIRES TOGETHER

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not

Requiring Common Signal Grounds

Note If using two conductor communication wire use the shield wire to connect all device signal grounds together as shown in the figure below If using three conductor communication wire use the 3rd conductor to connect all device signal grounds together and connect one side of the shield to earth ground

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

SIGNAL

GROUND

8

J2

SIGNAL

GROUND

8

J28

J2

USE SHIELD WIRE OR 3RD CONDUCTOR TO

CONNECT DEVICE SIGNAL GROUND TO

NETWORK SIGNAL GROUND

SET TERMINATOR SWITCH

ON IF REQUIRED

AAON AIRFLOW

SIGNAL PROCESSOR

NETWORK

COMMUNICATIONS

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

SIGNAL

GROUND

SIGNAL

GROUND

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds

39

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location

COMMUNICATION BOARD ID

BOARD SERIAL NO

40

Parameter Configuration 4112

If BACnet or Modbus communication is ordered the associated settings will need to be

configured with the exception of Modbus communication with WattMaster Controls which has

been configured at the factory To set the parameters refer to the following procedure below

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 41121

through 41124 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

41121 MAC Address (BACnet Communication Option)

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network Each AAON Airflow Signal

Processor must have a unique MAC Address assigned ranging from 2 to 127

Tech Config

Password 1000

4PT Flow Corr MAC Address

MAC Address (Range = 02 to 254)

Instance Number

Modbus ID (002)

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 3: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

Flow Correction 21 485

AutoZero 21 486

Temperature Compensation 22 487

Display Filter 25 488

Process Output Filter 25 489

HighLow Alarm Option 26 4810

Factory Defaults 27 4811

49 TECH CONFIGURATION MENUS 28

Area Factor 28 491

Minimum Calibration 30 492

Span Calibration 30 493

Altitude 30 494

Process Output Calibration 32 495

Probe Coefficient 32 496

Four Point Flow Correction 33 497

MAC Address (BACnet Communication Option) 33 498

Instance Number (BACnet Communication Option) 34 499

Modbus ID (Modbus Communication Option) 34 4910

Baud Rate (BACnet amp Modbus Communication Options) 34 4911

410 WARNING MESSAGES 35

Input Pressure Overrange Message 35 4101

Transducer Calibration Message 35 4102

Operating Range Message 35 4103

New Operating Range Message 35 4104

411 NETWORK COMMUNICATION 36

Electrical Connection 36 4111

Parameter Configuration 40 4112

BACnet Protocol Implementation Conformance Statements 42 4113

Modbus Software Configuration Parameters 46 4114

LonWorks Network Variables 48 4115

412 TROUBLESHOOTING 51

Base Unit 51 4121

BACnet Communication Option 53 4122

Modbus Communication Option 55 4123

LonWorks Communication Option 56 4124

INDEX OF TABLES AND FIGURES

Table 1 - Process Output Switch Configuration 15

Table 2 - Temperature Input Switch Configuration 15

Table 3 - Process Display Descriptions 16

Table 4 - Key Functions 17

Table 5 - Display Menus 18

Table 6 - Engineering Units 20

Table 7 - Factory Defaults 27

Table 8 - BACNET Protocol Implementation Conformance Statements 43

Table 9 - Standard Object Types Supported 44

Table 10 - Multistate Value 5 Engineering Units State_Textlist 45

Table 11 -MODBUS Software Configuration Parameters 46

Table 12 - MODBUS Device Objects 47

Table 13 -Engineering Unit Data Value Descriptions 48

Table 14 -MODBUS Exception Codes 48

Table 15 -Identification Of LONWORKS Module 48

Table 16 -LONWORKS Network Variables 49

Table 17 - Network Variable Types 50

Table 18 - Configuration Property 50

Table 19 -Base Unit Troubleshooting Table 51

Table 20 -BACNET Communication Troubleshooting Table 53

Table 21 -MODBUS Communication Troubleshooting Table 55

Table 22 - LONWORKS Communication Troubleshooting Table 56

Figure 1 - Electrical Connections 9

Figure 2 - Temperature Transmitter Positive amp Negative Connectors 10

Figure 3 - Electrical Connections 13

Figure 4 - Electrical Connection with Wattmaster Controls 14

Figure 5 - Pneumatic Connections 15

Figure 6 - Key Functions 17

Figure 7 - Network Communication Electrical Connection 37

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not Requiring

Common Signal Grounds 38

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds 38

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location 39

5

1 INTRODUCTION

11 DESCRIPTION

The AAON Outdoor Airflow Measurement System includes an airflow station airflow signal

processor and temperature transmitter and is capable of producing an overall plusmn05 accuracy

through the velocity range of 200 to 1200 fpm and plusmn5 accuracy at 100 fpm

The airflow station consists of multiple airflow elements factory mounted in the air handling

unit and pre-piped to the airflow signal processor Optional inlet bells are used for high turn

down or low velocity applications Standard materials consist of a G90 galvanized casing and

6063-T5 anodized aluminum flow sensors suitable for most HVAC applications The airflow

averaging elements are head type devices which generate a differential (velocity) pressure signal

similar to the orifice venturi and other head producing primary elements The airflow station is

constructed so as to comply with ASHRAE Standard 111 for equal area traversing of an airflow

measurement plane Multiple elements are manifolded together for connection to the airflow

signal processor

The airflow signal processor utilizes current state-of-the-art digital microprocessor technology

capable of producing unequaled 24-bit (16777216 steps) AD and 12 bit (4096 steps) DA

signal conversion resolution The ultra-low operating range and auto zeroing function of the

airflow signal processor provides accurate airflow measurement down to 100 fpm The signal

processor accepts a temperature input signal for air temperature indication temperature signal

transmission for remote readout and air density compensation for standard or actual airflow

calculations A password protected configuration menu provides quick and simple field

configuration by authorized personnel Field configuration of engineering units process noise

filtering operating range alarm set points etc are performed via user friendly menus and a six

button touch pad Device monitoring and configuration can also be performed by a building

management system through an optional LonWorksreg BACnetreg-MSTP Master or Modbusreg

Slave communication network Optional features also include HighLow Remote Alarms

A temperature transmitter with 4-20mA output and temperature range of -30 to 130degF is included

in the installation to provide a temperature input signal to the airflow signal processor for air

density calculations

6

12 BASIC OPERATION

The airflow station produces pneumatic output signals referred to as total (high) and static (low)

pressure These two pressures are piped to the airflow signal processor where the static pressure

is subtracted from the total and the result indicated as velocity pressure (differential pressure)

This measured differential pressure is equal to the average velocity of the air stream moving

through the plane that the airflow station is located in This signal can be converted to air

velocity and flow using the following equations

a

aT

460

921293251

a

VPV

71096

AVQ

Where

a Actual density of air in lbft3 (0075 lbft

3 at sea level and 68degF)

aT = Actual temperature in degF (default value is 68degF)

PV = Velocity pressure in inches H2O

V = Velocity in fpm

Q = Flow in cfm

A = Area in ft2

This signal is scaled and linearized before being displayed and transmitted out as a 4-20mA 0-

5VDC or 0-10VDC signal

The AutoZero feature corrects any zero offset caused by large ambient temperature changes

The Temperature Compensation feature compensates the flow signal for density changes caused

by variations in the air temperature

7

2 AIRFLOW STATION

21 SPECIFICATIONS

Material 211

Elements - 6063-T5 anodized aluminum

Casings - 16 ga G90 galvanized steel

Temperature 212

350F continuous operation (in air)

400F intermittent operation (in air)

Humidity 213

0 to 100 non-condensing

Instrument Connections 214

frac14rdquo compression suitable for use with thermoplastic or copper tubing thermoplastic tubing

requires the use of tubing inserts

22 MAINTENANCE

Since the sensing elements have no moving parts only periodic cleaning may be required The

sensing elements should be inspected for fouling of the sensing holes as part of an annual

preventative maintenance program Installations having viscous airborne particles may require

more frequent inspection If the sensing holes on the elements have become fouled or plugged

the following procedure is recommended Although the sensing elements are not fragile by

design care must be taken not to damage or disfigure the cylinder surface when handling

Particular attention must be given to the surface areas in which sensing ports are located

Caution prior to performing the following cleaning procedure the AAON Airflow Signal

Processor must be isolated by disconnect the Total (High) and Static (Low) Pressure

connections on the AAON Airflow Station

- Backpurging Connect cleandry compressed air set at a maximum pressure of 25

psi to the output pressure ports (total andor static) of the sensing element being

cleaned While purging the sensing element wipe the surface of the cylinder with a

cloth or brush to loosen and remove all contaminant buildup

- Cleaning In applications where the sensing elements are subject to viscous

contaminants it is recommended that the surface be washed with a cleaning agent

The cleaning agent used must be suitable for use on aluminum

8

3 TEMPERATURE TRANSMITTER

31 SPECIFICATIONS

Supply Voltage 311

85 to 32VDC

Combined Accuracy (Linearity Hysteresis and Repeatability) 312

plusmn020 of full scale

Temperature Range 313

-30degF to 130degF

Output 314

4-20mA

32 DIMENSIONS

TEMPERATURETRANSMITTER

Model ATT-1

AAON PN V28580

255

370

222

PG1116KNOCKOUT(TYP OF 6)

325

725(STANDARD)

reg

33 ELECTRICAL CONNECTION

All electrical connections from the AAON Temperature Transmitter to the AAON Airflow

Signal Processor have been made at the factory as shown in Figure 1 below Figure 2 shows the

AAON Temperature Transmitter positive and negative connector locations The following

procedure outlines the steps for checking the interface wiring if required

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

9

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor and

the AAON Temperature Transmitter cover by turning each screw counter

clockwise

Step 2 Remove the covers

Step 3 Verify that the Power Switch (S3) on the AAON Airflow Signal Processor is in

the OFF position

Step 4 Confirm the installation of the interface wiring for Pins 4 and 5 on the AAON

Airflow Signal Processor are connected to the positive and negative connectors on

the AAON Temperature Transmitter as shown in Figures 1 and 2 The three

electrical connectors (J1 J2 and optional J3) on the AAON Airflow Signal

Processor have removable terminal blocks for ease of installing the interface

wiring

Step 5 Verify that the Temp Input Switch (S1) on the AAON Airflow Signal Processor is

set to the mA position

Step 6 Turn the Power Switch (S3) on the AAON Airflow Signal Processor to the ON

position see Section 461 and 462 for display descriptions

Step 7 Replace the covers by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

(4-20mA LOOP

POWERED)+

- TRANSMITTER

S1S2 S4

+ 24VDC OUTPUT POWER

- TEMPERATURE INPUT(GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATIONS

- NETWORK COMMUNICATIONS

- PROCESS OUTPUT(GND)

+ PROCESS OUTPUT

8

10

9

4

6

7

5

J2

TEMPERATURE

S1 SET TO

mA POSITION

Figure 1 - Electrical Connections

10

+-

4-2

0m

A C

urre

nt L

oop

BACK SIDE OF COVER

RTD CONNECTION

Figure 2 - Temperature Transmitter Positive amp Negative Connectors

11

4 AIRFLOW SIGNAL PROCESSOR

41 SPECIFICATIONS

Power Supply 411

20 to 28 VACDC

Power Consumption 412

250mA at 24VAC

175mA at 24VDC

Accuracy 413

plusmn025 full scale

Temperature Input 414

4-20mA

Process Output Options 415

0-5VDC

0-10VDC

4-20mA (700Ω maximum load)

HighLow Alarm Relay Outputs 416

Two single (1 form C) dry contacts rated for

5 amps at 30VACDC

10 amps at 120VAC

42 SAFETY

Electrical Connections 421

Before any electrical connections are made ensure the POWER SWITCH is in the OFF

position

Static Electricity 422

The circuit board contains components which are susceptible to damage caused by static

electrical discharge Should it be necessary to remove the circuit board from the enclosure

appropriate precautions must first be taken to ensure that the operator and the circuit board are at

the same electrical potential

12

43 DIMENSIONS

100000ACFM

75 F

J1 J2

TOTALCONNECTION

STATICCONNECTION

462

5785

2265

350

525

Air Fl o wS IGN AL PROCES S OR

AAON

44 ELECTRICAL amp PNEUMATIC CONNECTIONS

All electrical and pneumatic connections to the AAON Airflow Signal Processor have been

made at the factory as shown in Figures 3 through 5 below with the exception of the electrical

connection for the HighLow Alarm Option if ordered and for network communication options

other than with WattMaster Controls The following procedure outlines the steps for turning

ON the AAON Airflow Signal Processor if network communication is required see Section

411 prior to turning ON the AAON Airflow Signal Processor

Caution ndash If electrical connections need to be rewired all electrical connections must be made

with the AAON Airflow Signal Processor Power Switch in the OFF position The three

electrical connectors (J1 J2 and optional J3) have removable terminal blocks for ease of

installing the interface wiring

13

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 4 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

(24VACDC)

POWER SUPPLY

ANALOG RECEIVING DEVICE

PROCESS OUTPUT

S1S2 S4

+

-

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

SWITCH POSITIONS

SHOWN IN BLACK

S1 POSITION

INDICATING 4-20mA

TEMPERATURE INPUT

S2 AND S4 POSITIONS

INDICATING 0-10VDC

PROCESS OUTPUT

RP1

S3

AAON

TEMPERATURE

TRANSMITTER

(4-20mA LOOP POWERED)+

-

Figure 3 - Electrical Connections

14

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROCOUTPUT

mA

V

10V

5V

(24VACDC)

POWER SUPPLY

ANALOG RECEIVING DEVICE

PROCESS OUTPUT

S1S2 S4

+

-

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

SWITCH POSITIONS

SHOWN IN BLACK

S1 POSITION

INDICATING 4-20mA

TEMPERATURE INPUT

S2 AND S4 POSITIONS

INDICATING 0-10VDC

PROCESS OUTPUT

RP1

S3

E-BUS DISTRIBUTION MODULE

+-

AAON

TEMPERATURE

TRANSMITTER

(4-20mA LOOP POWERED)+

-

- COMM

+ COMM

GND

THE SHIELDING WIRE SHOULD BE USED TO

CONNECT WATTMASTER GROUND TO AIRFLOW

SIGNAL PROCESSOR GROUND

Figure 4 - Electrical Connection with Wattmaster Controls

15

J1 J2

TOTAL

CONNECTION

STATIC

CONNECTION

TOTAL PRESSURE CONECTION

AAON AIRFLOW STATION

STATIC PRESSURE CONNECTION

AAON AIRFLOW STATION

Figure 5 - Pneumatic Connections

45 INPUTOUTPUT SET-UP

If input or output configuration changes are required refer to the Tables 1 and 2 in the sections

below and Figure 3 in Section 44

Process Output 451

If controls are provided by AAON the process output has been set by the factory for input to the

specific controller otherwise the default is 0-10VDC To change the output configuration set

the S2 amp S4 switches as follows

Table 1 - Process Output Switch Configuration

Process Output Range S2 S4

Current 4-20mA NA mA

Voltage 0-10VDC 10V V

Voltage 0-5VDC 5V V

Temperature Input 452

Since the AAON Temperature Transmitter has been provided the temperature input has been set

by the factory for 4-20mA To change the input configuration set the S1 switch as follows

Table 2 - Temperature Input Switch

Configuration

Temperature Input S1 Switch Selection

4-20mA mA

0-10VDC V

16

46 ACTIVE DISPLAYS amp KEY FUNCTIONS

Power-up Initiation Display 461

Upon initial power-up Software Revision information will be displayed on the graphic display

for approximately 5 seconds

EQ-1

Software Rev XXXXX

Modbus Rev XXXXX

Process Display Descriptions 462

After power-up initialization the following information will appear on the graphic display

depending upon the options purchased

75˚F

75˚F

75˚F

000000

000000

000000

AutoZero

ACFM

High Alarm

ACFM

Low Alarm

ACFM

Flow Monitoring with an

Auto Zero Cycle

Flow Monitoring with a

High Alarm Condition

Flow Monitoring with a

Low Alarm Condition

Table 3 - Process Display Descriptions

Number Description

1 Process value

2 Air Flow temperature units in degree F or C

3 Flashing Asterisk indicates the CPU is functioning

4 Engineering units

5 Displayed during an AutoZero cycle

6 Indicating High Alarm Value has been exceeded (HighLow Alarm Option)

7 Indicating Low Alarm Value has been exceeded (HighLow Alarm Option)

12 3

4

6

7 5

17

Key Functions 463

The following figure and description identify the function of each Key

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

2

13

4

567

8

RP1 9

Figure 6 - Key Functions

Table 4 - Key Functions

Number Description

1 Enter Key - Allows a user to enter into the Field Menu enter into a selected menu item

or store into memory changes made to the program

2 Up Key - Allows the user to scroll up in the menu list to a selected item or increase digits

when making value changes

3 Right Key - When making changes to user values the Right Key allows the user to scroll

to the correct digit for changes

4 Down Key - Allows the user to scroll down in the menu list to a selected item or

decrease digits when making value changes

5 Left Key - When making changes to user values the Left Key allows the user to scroll to

the correct digit for changes

6

Escape Key - The Escape Key allows the user to back out of the menu to the Active

Display If a user starts to make a change and decides to cancel the change the Escape

Key will allow the user to return to the Active Display without making the change

7 Power Switch ndash Allows a user to turn power off to the AAON Signal Processor during

field wiring or modifications to the device

8 Lon Switch ndash Allows a user to send a unique Neuron device ID when connecting to a

LonWorks communication network

9 RP1 ndash Allows a user to adjust the display contrast

18

47 DISPLAY MENUS

Table 5 shows the Field Setup and Tech Configuration Menus The display will vary depending

upon the options purchased

Table 5 - Display Menus

Field Setup Menu

(Press ENTER Key)

Tech Configuration Menu

(Press UPDOWN Keys simultaneously)

(Enter Password number 1000)

(Press ENTER Key)

Operating Range Area Factor

Zero Calibration Min Calibration

Eng Units Span Calibration

Lockdown Temp Fixed Value

Flow Correction Altitude

AutoZero Output Calibration

Temp Comp Correction Coeff

Display Filter 4PT Flow Corr

Output Filter MAC Address (Optional)

Alarm Options (Optional) Instance Number (Optional)

Factory Defaults Modbus ID (Optional)

Baud Rate (Optional)

48 FIELD SETUP MENUS

To set parameters under the Field Setup Menus refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Field Setup Menu by depressing and holding the Enter Key for 5

seconds

Step 2 Once in the Field Setup Menu use the UpDown Keys to highlight the

required parameter for configuration as shown in Sections 481 through

4811 Press the Enter Key once to access the highlighted parameter

Menu

Step 3 Once in the parameter menu the parameter can be changed using

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Field

Setup Menu

Step 4 After all of the required parameters have been configured exit the Field

Setup Menu by pressing the ESC Key The Process Display (see Section

462) will then be displayed

19

Operating Range 481

The Operating Range allows the user to enter a value which will represent 100 of the process

output signal (5VDC 10VDC or 20mA) The Operating Range Value has been set by the

factory to equal 110 of the design supply flow rate unless this value is less than the Minimum

Full Scale Value allowed for the AAON Airflow Signal Processor The menu will display the

Minimum Full Scale Value allowed which is then entered as the Operating Range

Field Setup

Menu

Operating Range Operating Range

Zero Calibration ( ACFM )

Engineering Units (6000-12000)

Lockdown (010000)

Zero Pressure Calibration 482

The Zero Calibration Menu allows the user to perform a zero transducer calibration to eliminate

any transducer zero shift

(Caution Before performing a zero calibration disconnect the Total (High) and Static (Low)

pressure connections perform a zero calibration and then reconnect the Total and Static

pressure connections)

Field Setup

Menu

Operating Range Input Value CPU Taking

Zero Calibration (0000) Inch wc Samples

Engineering Units

Lockdown (Press Enter) (Please Wait)

Engineering Units 483

Table 6 lists the engineering units that are available for the user to select from for display

purposes Changing the engineering units will affect the process display and the alarm value

menus The default setting is ACFM

Field Setup

Menu

Operating Range Eng Units

Zero Calibration

Engineering Units (ACFM)

Lockdown

20

Table 6 - Engineering Units

Standard

Flow

Units

Actual

Flow

Units

SCFM ACFM

SCFH LS

SLS Am3S

Sm3S Am3M

Sm3M Am3HR

Sm3HR

Lockdown 484

Due to the high square root gain associated with very low delta p values the display and process

output are locked to a zero value until the input value reaches the specified Lockdown Value that

was entered Above the Lockdown Value the output is linear to air flow

4841 Lockdown Value

The Lockdown Value can be changed from 0 to 20 of Operating Range Value Lockdown

Values can be changed in 1 increments The recommended standard is 5

Field Setup

Menu

Operating Range Lockdown (0-20)

Zero Calibration (5)

Engineering Units Delay (0-20 sec)

Lockdown (2) Sec

4842 Lockdown Delay

The Lockdown Delay Menu allows the user to enter a lockdown time delay (0-20 seconds) that

will delay the display and output lockdown from occurring until the flow value or output value

has remained below the lockdown value for that duration

Field Setup

Menu

Operating Range Lockdown (0-20)

Zero Calibration (5)

Engineering Units Delay (0-20 sec)

Lockdown (2) Sec

21

Flow Correction 485

The Flow Correction Menu was incorporated into the AAON Airflow Signal Processor to give

the user an easy way to make corrections to the display and output without changing the

Operating Range Value entered by the factory or user The Flow Correction Menu would be

used to correct for a constant error from zero to the entered Operating Range Value

4851 Flow Correction (K-Factor)

If the user knows the change required to match the balancers reading select the K-Factor

Menu and enter this value for the K-Factor The minimum and maximum allowable K-Factor

Value is displayed in the K-Factor Menu

Field Setup

Menu

Flow Correction Flow Correction

AutoZero K-Factor K-Factor Range

Temp Comp (085 13)

Display Filter K-Factor Calc K=(01000)

4852 Flow Correction (K-Factor Calculator)

If the new K-factor Value needs to be calculated select the K-Factor Calc Menu Enter the

Displayed Value on the AAON Airflow Signal Processor and actual Measured Value press

Enter and the change will be calculated and stored as the new K-Factor Value

Field Setup

Menu

Flow Correction Displayed Value

AutoZero K-Factor (000000)

Temp Comp Measured Value

Display Filter K-Factor Calc (000000)

-FLOW CORRECTION EXAMPLE-

The balancer is consistently measuring a value of 9500 CFM which is 500 CFM less than the

10000 CFM value on the AAON Airflow Signal Processor display The user would then

perform the following math function Measured Value Displayed Value = K-Factor so 9500

CFM 10000 CFM = 0950 The user would enter 0950 for the K-Factor Flow Correction If

the K-Factor Calculator is used the K- Factor Flow Correction would automatically update the K

Factor

AutoZero 486

The AutoZero feature corrects any zero offset caused by large ambient temperature changes

22

4861 AutoZero Status

The AutoZero Status Menu allows the user to turn the AutoZero function ON or OFF

Field Setup

Menu

Flow Correction AZ Status AZ Status

AutoZero AZ Interval (ONOFF)

Temp Comp AZ Test Interval

Display Filter (ON)

4862 AutoZero Interval

The AutoZero Interval Menu allows the user to select the AutoZero Interval from once an hour

to once a day in 1 hour increments Use the UPDOWN keys to select the interval value Upon

device power up an AutoZero cycle will occur after 20 seconds

Field Setup

Menu

Flow Correction AZ Status AZ Interval

AutoZero AZ Interval (1 TO 24HR)

Temp Comp AZ Test Interval

Display Filter (01)HR

4863 AutoZero Test Interval

For troubleshooting or testing the AutoZero function the AutoZero Test Interval Menu allows

the user to select an Auto Zero test frequency of once a minute to once every 30 minutes in 1

minute increments Use the UPDOWN keys to select the interval value If AutoZero Test

Interval is turned ON for more than 60 minutes it will automatically default to OFF and the

AutoZero Interval (see Section 4862) will be reactivated

Field Setup

Menu

Flow Correction AZ Status AZ Test Interval

AutoZero AZ Interval (OFF)

Temp Comp AZ Test Interval Interval

Display Filter (1)Min

Temperature Compensation 487

The Temperature Compensation option compensates the flow and velocity signal for density

changes caused by variations in the process air temperature An input signal from AAON

Temperature Transmitter is required see Section 33 for proper temperature transmitter

connection and Section 452 for temperature input signal configuration

23

4871 Temperature Units

The Temperature Units Menu allows the user to select the appropriate temperature units for the

job The default setting is ordmF

Field Setup

Menu

Flow Correction Temperature Units Units

AutoZero Temperature Values (ordmF ordmC)

Temp Comp Temperature Input

Display Filter Fixed Value (ordmF)

4872 Temperature Values

The Temperature Values Menu allows the factory or user to set the minimum and maximum

temperature range values that represent the input signal from the external temperature transmitter

or the building automation system Since the AAON Temperature Transmitter has been supplied

the minimum and maximum temperature range values of -30degF to 130degF have been

preprogramed

Field Setup

Menu

Flow Correction Temperature Units Minimum Value

AutoZero Temperature Values (-030)

Temp Comp Temperature Input Maximum Value

Display Filter Fixed Value (130)

If the temperature values are changed from the factory settings and the new temperature values

cause the existing Operating Range Value to be outside the new calculated Minimum or

Maximum Full Scale Value the below Warning Message will appear and the Operating Range

will be reset to the new Maximum Full Scale Value by pressing Enter The display will

automatically jump to the Operating Range Menu allowing the user to enter a new Operating

Range Value This can be accomplished by performing the steps under Section 481 See

Temperature Range Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

24

Minimum Value

(-000)

Maximum Value

(000)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Min amp

Max Temperature

value and pressing the

Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Temperature Range Example-

Minimum Value

(-000)

Accepted

(100)

4873 Temperature Input

The Temperature Input Menu allows the user to select between three temperature input options

(Fixed Variable and Network) for the flow calculations Since the AAON Temperature

Transmitter has been supplied Variable has been selected If Fixed is selected the default

temperature value entered in the Fixed Value Menu (see Section 4874) is used If Net is

selected the temperature input signal is obtained through network communications The Net

option is only available if one of the communication options is ordered The temperature value

is only displayed on the LCD screen if the Temperature Input is set to Variable or Network

Field Setup

Menu

Flow Correction Temperature Units Temp Input

AutoZero Temperature Values (FixVarNet)

Temp Comp Temperature Input

Display Filter Fixed Value (Variable)

25

4874 Fixed Value

The Fixed Value Menu allows the user to enter a temperature value for the flow calculations

This value will not be displayed on the LCD screen

Field Setup

Menu

Flow Correction Temperature Units Fixed Value

AutoZero Temperature Values (˚F)

Temp Comp Temperature Input

Display Filter Fixed Value (+068)

Display Filter 488

The Display Filter Menu allows the user to adjust the Display Filter rolling average algorithm by

setting the Sample Interval Time value in seconds and the number of rolling average Sample

Counts The adjustment range of the Sample Interval Time is 010 to 655 seconds in 010

increments The Sample Count range is 0 to 150 Sample Counts The Display Filter is

independent of the Process Output Filter Value (See Section 489)

Field Setup

Menu

Flow Correction Sample Interval Time

AutoZero (005)sec

Temp Comp (0-150) Sample Count

Display Filter (010)

Process Output Filter 489

The Process Output Filter Menu allows the user to adjust the Process Output Filters rolling

average algorithm by setting the Sample Interval Time value in seconds and the number of

rolling average Sample Counts The adjustment range of the Sample Interval Time is 010 to

655 seconds in 010 increments The Sample Count range is 0 to 150 Sample Counts The

Process Output Filter is independent of the Display Filter Value (See Section 488)

Field Setup

Menu

Output Filter Sample Interval Time

Alarm Options (005)sec

Factory Defaults (0-150) Sample Count

(010)

26

HighLow Alarm Option 4810

The following menus for configuration of HighLow Alarms are only available if the HighLow

Alarm option is purchased

48101 Alarm Status

The Alarm Status allows the user to independently turn each alarm ON or OFF

Field Setup

Menu

Output Filter Alarm Status Low Alarm

Alarm Options Alarm Value (On)

Factory Defaults Alarm Delay High Alarm

(On)

48102 Alarm Values

The Alarm Value Menu allows the user to enter the Low or the High flow alarm value Alarm

values will be displayed in the same engineering units selected in the Eng Units Menu (see

Section 483)

- High Alarm Function The High Alarm activates if the flow exceeds the High Alarm

value and resets when the flow drops below the High Alarm Value

- Low Alarm Function The Low Alarm activates if the flow drops below the Low

Alarm Value and resets when the flow exceeds the Low Alarm Value

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Value

Alarm Options Alarm Value (000000)

Factory Defaults Alarm Delay Hi Alarm Value

(100000)

48103 Alarm Delay

The Alarm Delay Menu allows the user to enter an alarm delay of 0 to 999 seconds before an

alarm will be activated The alarm will be reset without a delay

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Delay

Alarm Options Alarm Value (000)Seconds

Factory Defaults Alarm Delay Hi Alarm Delay

(000)Seconds

27

Factory Defaults 4811

If parameter configuration changes have been made incorrectly to the AAON Airflow Signal

Processor all device settings can be restored to the original AAON factory settings by selecting

YES and pressing Enter in both the Set To Factory Defaults Menu and the Verify Set To Factory

Defaults Menu (see Table 7 below for a list of Saved Settings)

Field Setup

Menu

Output Filter Set To Verify Set To

Alarm Options Factory Defaults Factory Defaults

Factory Defaults

(No) (No)

Table 7 - Factory Defaults

Item Saved Setting Item Saved Setting

1 All Factory Calibration Points (12) 14 MAC Address

2 Area Factor 15 Instance Number

3 Operating Range 16 Engineering Units

4 4 Pt Flow Correction 17 Display Filter Values

5 Altitude 18 Output Filter

6 K-Factor 19 DP Display Format

7 Lockdown amp Delay Values 20 Output Calibration

8 Flow Correction 21 AutoZero Status

9 Flow Coefficient 22 AutoZero Interval

10 Min amp Max Temp Range Values 23 Temp Units

11 Alarm Status 24 Temp Input

12 Alarm Values 25 Temp Fixed Value

13 Alarm Delay 26 Baud Rate

28

49 TECH CONFIGURATION MENUS

To set parameters under the Tech Configuration Menu refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 491

through 4911 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

Area Factor 491

To convert the differential pressure signal from the AAON Airflow Station to a flow value the

Area Factor associated with the AAON Airflow Station has been preprogramed by the factory

If the Area Factor needs to be checked or reconfigured the correct Area Factor for the AAON

Airflow Station can be found on the AAON Airflow Station product label installed in the air

handling unit

Tech Config

Password 1000

Area Factor Area Factor

Min Calibration (FT2)

Span Calibration

Altitude (001000)

29

If the Area Factor is reconfigured and the new Area Factor causes the existing Operating Range

Value to be outside the new calculated Minimum or Maximum Full Scale Value the below

Warning Message will appear and the Operating Range will be reset to the new Maximum Full

Scale Value by pressing Enter The display will automatically jump to the Operating Range

Menu allowing the user to enter a new Operating Range Value This can be accomplished by

performing the steps under Section 481 See Area Factor Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Area Factor

(FT )

(001000)

Area Factor

(FT )

Accepted

(001200)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Area

Factor and pressing

the Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Area Factor Example-

2

2

30

Minimum Calibration 492

The Minimum Calibration Menu allows a user to perform a minimum transducer calibration

This value will be placed in a different memory location and used until a Return to Factory

Defaults is selected (see Section 4811)

(Caution Before performing a minimum calibration disconnect the Total (High) and Static

(Low) Pressure connections perform a minimum calibration and then reconnect the Total

and Static Pressure connections)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00000) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Span Calibration 493

The Span Calibration Menu allows the user to perform a span transducer calibration to eliminate

any possible transducer drift This value will be placed in a different memory location than the

Factory Span memory location and used until a Return to Factory Defaults is selected (see

Section 4811)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00570) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Altitude 494

The Altitude Menu allows the user to enter the specific altitude for the job for the density

calculations the job specific site Altitude has been preprogramed by the factory

Tech Config

Password 1000

Area Factor Altitude

Min Calibration

Span Calibration (0000)Ft

Altitude

31

If the Altitude is changed from the factory setting and the new Altitude causes the existing

Operating Range Value to be outside the new calculated Minimum or Maximum Full Scale

Value the below Warning Message will appear and the Operating Range will be reset to the new

Maximum Full Scale Value by pressing Enter The display will automatically jump to the

Operating Range Menu allowing the user to enter a new Operating Range Value This can be

accomplished by performing the steps under Section 481 See Altitude Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Altitude

(0000)Ft

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Altitude

and pressing the Enter

button will calculate

new Min amp Max Op

Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Altitude Example-

Altitude

Accepted

(0100)Ft

32

Process Output Calibration 495

4951 Minimum Calibration

The Minimum Calibration Menu allows the user to make output zero adjustments Monitor the

output and with each Up or Down key depression the output will increase or decrease by

001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

4952 Span Calibration

The Span Calibration Menu allows the user to make output span adjustments Span adjustments

require a low pressure air source adjusted to the Full Scale Value shown on the side label

Monitor the output and with each Up or Down button depression the output will increase or

decrease by 001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

Probe Coefficient 496

The Probe Correction Coefficient Menu allows the user to modify the formula constant of

109670 used for non-amplified Pitot-type flow sensors

Tech Config

Password 1000

Output Calibration Correction Coeff

Correction Coeff Probe

4PT Flow Corr (109670)

MAC Address (00109670)

33

Four Point Flow Correction 497

The Four Point Flow Correction Menu allows the user to make corrections to the display and

output signal at 20 increments between 20 and 80 of the Operating Range Value entered

The Displayed Value is a fixed value determined by the percentage of Operating Range The

Measured Value is the value determined by an independent balancerrsquos reading

Tech Config

Password 1000

Output Calibration 80000 CFM Displayed Value

Correction Coeff 60000 CFM 80000

4PT Flow Corr 40000 CFM Measured Value

MAC Address 20000 CFM 79500

80000 CFM Displayed Value

60000 CFM 60000

40000 CFM Measured Value

20000 CFM 60500

80000 CFM Displayed Value

60000 CFM 40000

40000 CFM Measured Value

20000 CFM 40100

80000 CFM Displayed Value

60000 CFM 20000

40000 CFM Measured Value

20000 CFM 19500

MAC Address (BACnet Communication Option) 498

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network The default is 002 For

additional information refer to Section 411

Tech Config

Password 1000

Output Calibration MAC Address

Correction Coeff (Range = 02 to 254)

4PT Flow Corr

MAC Address (002)

34

Instance Number (BACnet Communication Option) 499

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The default is 1002 For

additional information refer to Section 411

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (Default = 1002)

Instance Number

Modbus ID (01002)

Modbus ID (Modbus Communication Option) 4910

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network The default is 002 For

communication with WattMaster Controls the Modbus ID has been set by the factory to 009 for

outside airflow applications For additional information refer to the Section 411

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

Baud Rate (BACnet amp Modbus Communication Options) 4911

The Baud Rate Menu allows the user to set a unique network baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate Modbus communications supports

96 192 384 576 and 1152 Kbps baud rate The default is 384 Kbps For communication

with WattMaster Controls the Baud Rate has been set by the factory to 96 Kbps For additional

information refer to Section 411

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

35

410 WARNING MESSAGES

Input Pressure Overrange Message 4101

If the input pressure exceeds the entered Operating Range Value the following message will

appear on the display It will alternate between the process display and the error message until

the input falls below the Operating Range Value

- Caution -

Input Beyond

Operating Range

Selected

Transducer Calibration Message 4102

If during a transducer zero or span calibration process the transducer output pressure value

measured exceeds plusmn20 of the expected value the following message will appear on the display

Once the Enter button is pressed the display returns to the previous calibration menu

Value entered is

Outside Factory

set limits

(Press Enter)

Operating Range Message 4103

If the new values entered for Temperature Compensation Area Factor or Altitude (see Sections

487 491 and 494) causes the Operating Range Value to exceed the new calculated

Maximum Full Scale Value the following message will appear on the display

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

New Operating Range Message 4104

If a user enters a new Operating Range Value the following message will appear on the display

notifying the user that if any 4 PT Flow Correction Values (see Section 497) were previously

entered they will be reset The message allows the user to confirm that the Operating Range

change should be made To complete the Operating Range change the user must use the

UPDown buttons to change the NO to a YES and press the ENTER button

Value will

Reset 4PT

Flow Correction

Values

Make the Change

(NO)

(Press Enter)

36

411 NETWORK COMMUNICATION

The AAON Airflow Signal Processor can be ordered with BACnet Modbus or LonWorks

Communication For BACnet Communication the AAON Airflow Signal Processors utilize

MSTP (Master SlaveToken Passing) BACnet type protocol BACnet is implemented using

EIA-485 signaling standards through a shielded twisted pair wire operating at a baud rate of 96

Kbps to 768 Kbps Each device has a unique MAC Address ranging from 2 to 127 Refer to

Section 4113 for BACnet Protocol Implementation Conformance Statements (PICS) For

Modbus Communication the AAON Airflow Signal Processors utilize the Modbus ndash RTU Slave

protocol using EIA-485 signaling standards through a shielded twisted pair wire operating at a

baud rate of 96 Kbps to 1152 Kbps Each device has a unique Modbus ID ranging from 1 to

254 Refer to Section 4114 for Modbus software configuration parameters For LonWorks

Communication each AAON Airflow Signal Processor has a unique Neuron Chip ID which is

loaded on the network by pressing a service switch located on the main board (see Section

4111 Figure 7) The LonWorks network utilizes a shielded twisted pair wire operating at a

fixed baud rate of 78 Kbps Refer to Section 4115 for LonWorks network variables

Sections 4111 and 4112 contain procedures for electrical connection of the AAON Airflow

Signal Processor to the network and for configuring the required communication parameters

Electrical Connection 4111

The following procedure outlines the steps for installing the interface wiring for network

communication Network wire should be low capacitance shielded 22 or 24 AWG twisted pair

with PVC jacket such as Belden Part numbers 9841 3105A or equivalent

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Verify that the Power Switch (S3) is in the OFF position and install the interface

wiring for Pins 9 and 10 as shown in Figure 7 If multiple AAON Airflow Signal

Processors will be connected to the same network see Figure 8 for connecting

multiple devices For network systems that require all devices to have a common

signal ground refer to Figure 9 for electrical connection The J2 electrical

connector has a removable terminal block for ease of installing the interface

wiring

Step 4 For proper operation of BACnet and Modbus communication networks the

device that is electrically installed at the end of the network may require the

Terminator Switch be moved to the ON position to prevent line and data

reflection If Terminator is required it must be applied to both physical ends of

the network All other devices should have the Terminator Switch in the OFF

position The communication board is located on the back side of the main

AAON Airflow Signal Processor board See Figure 10 below for Terminator

Switch location on the communication board

Step 5 For LonWorks Communication refer to Figure 7 for the location of the Lon

Service Pin

37

Step 6 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 7 Configure the required parameters as outlined in Section 4112

Step 8 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

RP1

S3

NETWORK

COMMUNICATION+

-

LON

SERVICE PIN

Figure 7 - Network Communication Electrical Connection

38

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

AAON AIRFLOW

SIGNAL PROCESSOR

CONNECT ONLY ONE END OF SHIELD

WIRE TO EARTH GROUND AS SHOWN

SET TERMINATOR SWITCH

ON IF REQUIRED

NETWORK

COMMUNICATIONS

NETWORK

CONNECT SHIELD

WIRES TOGETHER

CONNECT SHIELD

WIRES TOGETHER

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not

Requiring Common Signal Grounds

Note If using two conductor communication wire use the shield wire to connect all device signal grounds together as shown in the figure below If using three conductor communication wire use the 3rd conductor to connect all device signal grounds together and connect one side of the shield to earth ground

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

SIGNAL

GROUND

8

J2

SIGNAL

GROUND

8

J28

J2

USE SHIELD WIRE OR 3RD CONDUCTOR TO

CONNECT DEVICE SIGNAL GROUND TO

NETWORK SIGNAL GROUND

SET TERMINATOR SWITCH

ON IF REQUIRED

AAON AIRFLOW

SIGNAL PROCESSOR

NETWORK

COMMUNICATIONS

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

SIGNAL

GROUND

SIGNAL

GROUND

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds

39

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location

COMMUNICATION BOARD ID

BOARD SERIAL NO

40

Parameter Configuration 4112

If BACnet or Modbus communication is ordered the associated settings will need to be

configured with the exception of Modbus communication with WattMaster Controls which has

been configured at the factory To set the parameters refer to the following procedure below

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 41121

through 41124 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

41121 MAC Address (BACnet Communication Option)

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network Each AAON Airflow Signal

Processor must have a unique MAC Address assigned ranging from 2 to 127

Tech Config

Password 1000

4PT Flow Corr MAC Address

MAC Address (Range = 02 to 254)

Instance Number

Modbus ID (002)

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 4: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

INDEX OF TABLES AND FIGURES

Table 1 - Process Output Switch Configuration 15

Table 2 - Temperature Input Switch Configuration 15

Table 3 - Process Display Descriptions 16

Table 4 - Key Functions 17

Table 5 - Display Menus 18

Table 6 - Engineering Units 20

Table 7 - Factory Defaults 27

Table 8 - BACNET Protocol Implementation Conformance Statements 43

Table 9 - Standard Object Types Supported 44

Table 10 - Multistate Value 5 Engineering Units State_Textlist 45

Table 11 -MODBUS Software Configuration Parameters 46

Table 12 - MODBUS Device Objects 47

Table 13 -Engineering Unit Data Value Descriptions 48

Table 14 -MODBUS Exception Codes 48

Table 15 -Identification Of LONWORKS Module 48

Table 16 -LONWORKS Network Variables 49

Table 17 - Network Variable Types 50

Table 18 - Configuration Property 50

Table 19 -Base Unit Troubleshooting Table 51

Table 20 -BACNET Communication Troubleshooting Table 53

Table 21 -MODBUS Communication Troubleshooting Table 55

Table 22 - LONWORKS Communication Troubleshooting Table 56

Figure 1 - Electrical Connections 9

Figure 2 - Temperature Transmitter Positive amp Negative Connectors 10

Figure 3 - Electrical Connections 13

Figure 4 - Electrical Connection with Wattmaster Controls 14

Figure 5 - Pneumatic Connections 15

Figure 6 - Key Functions 17

Figure 7 - Network Communication Electrical Connection 37

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not Requiring

Common Signal Grounds 38

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds 38

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location 39

5

1 INTRODUCTION

11 DESCRIPTION

The AAON Outdoor Airflow Measurement System includes an airflow station airflow signal

processor and temperature transmitter and is capable of producing an overall plusmn05 accuracy

through the velocity range of 200 to 1200 fpm and plusmn5 accuracy at 100 fpm

The airflow station consists of multiple airflow elements factory mounted in the air handling

unit and pre-piped to the airflow signal processor Optional inlet bells are used for high turn

down or low velocity applications Standard materials consist of a G90 galvanized casing and

6063-T5 anodized aluminum flow sensors suitable for most HVAC applications The airflow

averaging elements are head type devices which generate a differential (velocity) pressure signal

similar to the orifice venturi and other head producing primary elements The airflow station is

constructed so as to comply with ASHRAE Standard 111 for equal area traversing of an airflow

measurement plane Multiple elements are manifolded together for connection to the airflow

signal processor

The airflow signal processor utilizes current state-of-the-art digital microprocessor technology

capable of producing unequaled 24-bit (16777216 steps) AD and 12 bit (4096 steps) DA

signal conversion resolution The ultra-low operating range and auto zeroing function of the

airflow signal processor provides accurate airflow measurement down to 100 fpm The signal

processor accepts a temperature input signal for air temperature indication temperature signal

transmission for remote readout and air density compensation for standard or actual airflow

calculations A password protected configuration menu provides quick and simple field

configuration by authorized personnel Field configuration of engineering units process noise

filtering operating range alarm set points etc are performed via user friendly menus and a six

button touch pad Device monitoring and configuration can also be performed by a building

management system through an optional LonWorksreg BACnetreg-MSTP Master or Modbusreg

Slave communication network Optional features also include HighLow Remote Alarms

A temperature transmitter with 4-20mA output and temperature range of -30 to 130degF is included

in the installation to provide a temperature input signal to the airflow signal processor for air

density calculations

6

12 BASIC OPERATION

The airflow station produces pneumatic output signals referred to as total (high) and static (low)

pressure These two pressures are piped to the airflow signal processor where the static pressure

is subtracted from the total and the result indicated as velocity pressure (differential pressure)

This measured differential pressure is equal to the average velocity of the air stream moving

through the plane that the airflow station is located in This signal can be converted to air

velocity and flow using the following equations

a

aT

460

921293251

a

VPV

71096

AVQ

Where

a Actual density of air in lbft3 (0075 lbft

3 at sea level and 68degF)

aT = Actual temperature in degF (default value is 68degF)

PV = Velocity pressure in inches H2O

V = Velocity in fpm

Q = Flow in cfm

A = Area in ft2

This signal is scaled and linearized before being displayed and transmitted out as a 4-20mA 0-

5VDC or 0-10VDC signal

The AutoZero feature corrects any zero offset caused by large ambient temperature changes

The Temperature Compensation feature compensates the flow signal for density changes caused

by variations in the air temperature

7

2 AIRFLOW STATION

21 SPECIFICATIONS

Material 211

Elements - 6063-T5 anodized aluminum

Casings - 16 ga G90 galvanized steel

Temperature 212

350F continuous operation (in air)

400F intermittent operation (in air)

Humidity 213

0 to 100 non-condensing

Instrument Connections 214

frac14rdquo compression suitable for use with thermoplastic or copper tubing thermoplastic tubing

requires the use of tubing inserts

22 MAINTENANCE

Since the sensing elements have no moving parts only periodic cleaning may be required The

sensing elements should be inspected for fouling of the sensing holes as part of an annual

preventative maintenance program Installations having viscous airborne particles may require

more frequent inspection If the sensing holes on the elements have become fouled or plugged

the following procedure is recommended Although the sensing elements are not fragile by

design care must be taken not to damage or disfigure the cylinder surface when handling

Particular attention must be given to the surface areas in which sensing ports are located

Caution prior to performing the following cleaning procedure the AAON Airflow Signal

Processor must be isolated by disconnect the Total (High) and Static (Low) Pressure

connections on the AAON Airflow Station

- Backpurging Connect cleandry compressed air set at a maximum pressure of 25

psi to the output pressure ports (total andor static) of the sensing element being

cleaned While purging the sensing element wipe the surface of the cylinder with a

cloth or brush to loosen and remove all contaminant buildup

- Cleaning In applications where the sensing elements are subject to viscous

contaminants it is recommended that the surface be washed with a cleaning agent

The cleaning agent used must be suitable for use on aluminum

8

3 TEMPERATURE TRANSMITTER

31 SPECIFICATIONS

Supply Voltage 311

85 to 32VDC

Combined Accuracy (Linearity Hysteresis and Repeatability) 312

plusmn020 of full scale

Temperature Range 313

-30degF to 130degF

Output 314

4-20mA

32 DIMENSIONS

TEMPERATURETRANSMITTER

Model ATT-1

AAON PN V28580

255

370

222

PG1116KNOCKOUT(TYP OF 6)

325

725(STANDARD)

reg

33 ELECTRICAL CONNECTION

All electrical connections from the AAON Temperature Transmitter to the AAON Airflow

Signal Processor have been made at the factory as shown in Figure 1 below Figure 2 shows the

AAON Temperature Transmitter positive and negative connector locations The following

procedure outlines the steps for checking the interface wiring if required

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

9

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor and

the AAON Temperature Transmitter cover by turning each screw counter

clockwise

Step 2 Remove the covers

Step 3 Verify that the Power Switch (S3) on the AAON Airflow Signal Processor is in

the OFF position

Step 4 Confirm the installation of the interface wiring for Pins 4 and 5 on the AAON

Airflow Signal Processor are connected to the positive and negative connectors on

the AAON Temperature Transmitter as shown in Figures 1 and 2 The three

electrical connectors (J1 J2 and optional J3) on the AAON Airflow Signal

Processor have removable terminal blocks for ease of installing the interface

wiring

Step 5 Verify that the Temp Input Switch (S1) on the AAON Airflow Signal Processor is

set to the mA position

Step 6 Turn the Power Switch (S3) on the AAON Airflow Signal Processor to the ON

position see Section 461 and 462 for display descriptions

Step 7 Replace the covers by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

(4-20mA LOOP

POWERED)+

- TRANSMITTER

S1S2 S4

+ 24VDC OUTPUT POWER

- TEMPERATURE INPUT(GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATIONS

- NETWORK COMMUNICATIONS

- PROCESS OUTPUT(GND)

+ PROCESS OUTPUT

8

10

9

4

6

7

5

J2

TEMPERATURE

S1 SET TO

mA POSITION

Figure 1 - Electrical Connections

10

+-

4-2

0m

A C

urre

nt L

oop

BACK SIDE OF COVER

RTD CONNECTION

Figure 2 - Temperature Transmitter Positive amp Negative Connectors

11

4 AIRFLOW SIGNAL PROCESSOR

41 SPECIFICATIONS

Power Supply 411

20 to 28 VACDC

Power Consumption 412

250mA at 24VAC

175mA at 24VDC

Accuracy 413

plusmn025 full scale

Temperature Input 414

4-20mA

Process Output Options 415

0-5VDC

0-10VDC

4-20mA (700Ω maximum load)

HighLow Alarm Relay Outputs 416

Two single (1 form C) dry contacts rated for

5 amps at 30VACDC

10 amps at 120VAC

42 SAFETY

Electrical Connections 421

Before any electrical connections are made ensure the POWER SWITCH is in the OFF

position

Static Electricity 422

The circuit board contains components which are susceptible to damage caused by static

electrical discharge Should it be necessary to remove the circuit board from the enclosure

appropriate precautions must first be taken to ensure that the operator and the circuit board are at

the same electrical potential

12

43 DIMENSIONS

100000ACFM

75 F

J1 J2

TOTALCONNECTION

STATICCONNECTION

462

5785

2265

350

525

Air Fl o wS IGN AL PROCES S OR

AAON

44 ELECTRICAL amp PNEUMATIC CONNECTIONS

All electrical and pneumatic connections to the AAON Airflow Signal Processor have been

made at the factory as shown in Figures 3 through 5 below with the exception of the electrical

connection for the HighLow Alarm Option if ordered and for network communication options

other than with WattMaster Controls The following procedure outlines the steps for turning

ON the AAON Airflow Signal Processor if network communication is required see Section

411 prior to turning ON the AAON Airflow Signal Processor

Caution ndash If electrical connections need to be rewired all electrical connections must be made

with the AAON Airflow Signal Processor Power Switch in the OFF position The three

electrical connectors (J1 J2 and optional J3) have removable terminal blocks for ease of

installing the interface wiring

13

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 4 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

(24VACDC)

POWER SUPPLY

ANALOG RECEIVING DEVICE

PROCESS OUTPUT

S1S2 S4

+

-

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

SWITCH POSITIONS

SHOWN IN BLACK

S1 POSITION

INDICATING 4-20mA

TEMPERATURE INPUT

S2 AND S4 POSITIONS

INDICATING 0-10VDC

PROCESS OUTPUT

RP1

S3

AAON

TEMPERATURE

TRANSMITTER

(4-20mA LOOP POWERED)+

-

Figure 3 - Electrical Connections

14

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROCOUTPUT

mA

V

10V

5V

(24VACDC)

POWER SUPPLY

ANALOG RECEIVING DEVICE

PROCESS OUTPUT

S1S2 S4

+

-

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

SWITCH POSITIONS

SHOWN IN BLACK

S1 POSITION

INDICATING 4-20mA

TEMPERATURE INPUT

S2 AND S4 POSITIONS

INDICATING 0-10VDC

PROCESS OUTPUT

RP1

S3

E-BUS DISTRIBUTION MODULE

+-

AAON

TEMPERATURE

TRANSMITTER

(4-20mA LOOP POWERED)+

-

- COMM

+ COMM

GND

THE SHIELDING WIRE SHOULD BE USED TO

CONNECT WATTMASTER GROUND TO AIRFLOW

SIGNAL PROCESSOR GROUND

Figure 4 - Electrical Connection with Wattmaster Controls

15

J1 J2

TOTAL

CONNECTION

STATIC

CONNECTION

TOTAL PRESSURE CONECTION

AAON AIRFLOW STATION

STATIC PRESSURE CONNECTION

AAON AIRFLOW STATION

Figure 5 - Pneumatic Connections

45 INPUTOUTPUT SET-UP

If input or output configuration changes are required refer to the Tables 1 and 2 in the sections

below and Figure 3 in Section 44

Process Output 451

If controls are provided by AAON the process output has been set by the factory for input to the

specific controller otherwise the default is 0-10VDC To change the output configuration set

the S2 amp S4 switches as follows

Table 1 - Process Output Switch Configuration

Process Output Range S2 S4

Current 4-20mA NA mA

Voltage 0-10VDC 10V V

Voltage 0-5VDC 5V V

Temperature Input 452

Since the AAON Temperature Transmitter has been provided the temperature input has been set

by the factory for 4-20mA To change the input configuration set the S1 switch as follows

Table 2 - Temperature Input Switch

Configuration

Temperature Input S1 Switch Selection

4-20mA mA

0-10VDC V

16

46 ACTIVE DISPLAYS amp KEY FUNCTIONS

Power-up Initiation Display 461

Upon initial power-up Software Revision information will be displayed on the graphic display

for approximately 5 seconds

EQ-1

Software Rev XXXXX

Modbus Rev XXXXX

Process Display Descriptions 462

After power-up initialization the following information will appear on the graphic display

depending upon the options purchased

75˚F

75˚F

75˚F

000000

000000

000000

AutoZero

ACFM

High Alarm

ACFM

Low Alarm

ACFM

Flow Monitoring with an

Auto Zero Cycle

Flow Monitoring with a

High Alarm Condition

Flow Monitoring with a

Low Alarm Condition

Table 3 - Process Display Descriptions

Number Description

1 Process value

2 Air Flow temperature units in degree F or C

3 Flashing Asterisk indicates the CPU is functioning

4 Engineering units

5 Displayed during an AutoZero cycle

6 Indicating High Alarm Value has been exceeded (HighLow Alarm Option)

7 Indicating Low Alarm Value has been exceeded (HighLow Alarm Option)

12 3

4

6

7 5

17

Key Functions 463

The following figure and description identify the function of each Key

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

2

13

4

567

8

RP1 9

Figure 6 - Key Functions

Table 4 - Key Functions

Number Description

1 Enter Key - Allows a user to enter into the Field Menu enter into a selected menu item

or store into memory changes made to the program

2 Up Key - Allows the user to scroll up in the menu list to a selected item or increase digits

when making value changes

3 Right Key - When making changes to user values the Right Key allows the user to scroll

to the correct digit for changes

4 Down Key - Allows the user to scroll down in the menu list to a selected item or

decrease digits when making value changes

5 Left Key - When making changes to user values the Left Key allows the user to scroll to

the correct digit for changes

6

Escape Key - The Escape Key allows the user to back out of the menu to the Active

Display If a user starts to make a change and decides to cancel the change the Escape

Key will allow the user to return to the Active Display without making the change

7 Power Switch ndash Allows a user to turn power off to the AAON Signal Processor during

field wiring or modifications to the device

8 Lon Switch ndash Allows a user to send a unique Neuron device ID when connecting to a

LonWorks communication network

9 RP1 ndash Allows a user to adjust the display contrast

18

47 DISPLAY MENUS

Table 5 shows the Field Setup and Tech Configuration Menus The display will vary depending

upon the options purchased

Table 5 - Display Menus

Field Setup Menu

(Press ENTER Key)

Tech Configuration Menu

(Press UPDOWN Keys simultaneously)

(Enter Password number 1000)

(Press ENTER Key)

Operating Range Area Factor

Zero Calibration Min Calibration

Eng Units Span Calibration

Lockdown Temp Fixed Value

Flow Correction Altitude

AutoZero Output Calibration

Temp Comp Correction Coeff

Display Filter 4PT Flow Corr

Output Filter MAC Address (Optional)

Alarm Options (Optional) Instance Number (Optional)

Factory Defaults Modbus ID (Optional)

Baud Rate (Optional)

48 FIELD SETUP MENUS

To set parameters under the Field Setup Menus refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Field Setup Menu by depressing and holding the Enter Key for 5

seconds

Step 2 Once in the Field Setup Menu use the UpDown Keys to highlight the

required parameter for configuration as shown in Sections 481 through

4811 Press the Enter Key once to access the highlighted parameter

Menu

Step 3 Once in the parameter menu the parameter can be changed using

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Field

Setup Menu

Step 4 After all of the required parameters have been configured exit the Field

Setup Menu by pressing the ESC Key The Process Display (see Section

462) will then be displayed

19

Operating Range 481

The Operating Range allows the user to enter a value which will represent 100 of the process

output signal (5VDC 10VDC or 20mA) The Operating Range Value has been set by the

factory to equal 110 of the design supply flow rate unless this value is less than the Minimum

Full Scale Value allowed for the AAON Airflow Signal Processor The menu will display the

Minimum Full Scale Value allowed which is then entered as the Operating Range

Field Setup

Menu

Operating Range Operating Range

Zero Calibration ( ACFM )

Engineering Units (6000-12000)

Lockdown (010000)

Zero Pressure Calibration 482

The Zero Calibration Menu allows the user to perform a zero transducer calibration to eliminate

any transducer zero shift

(Caution Before performing a zero calibration disconnect the Total (High) and Static (Low)

pressure connections perform a zero calibration and then reconnect the Total and Static

pressure connections)

Field Setup

Menu

Operating Range Input Value CPU Taking

Zero Calibration (0000) Inch wc Samples

Engineering Units

Lockdown (Press Enter) (Please Wait)

Engineering Units 483

Table 6 lists the engineering units that are available for the user to select from for display

purposes Changing the engineering units will affect the process display and the alarm value

menus The default setting is ACFM

Field Setup

Menu

Operating Range Eng Units

Zero Calibration

Engineering Units (ACFM)

Lockdown

20

Table 6 - Engineering Units

Standard

Flow

Units

Actual

Flow

Units

SCFM ACFM

SCFH LS

SLS Am3S

Sm3S Am3M

Sm3M Am3HR

Sm3HR

Lockdown 484

Due to the high square root gain associated with very low delta p values the display and process

output are locked to a zero value until the input value reaches the specified Lockdown Value that

was entered Above the Lockdown Value the output is linear to air flow

4841 Lockdown Value

The Lockdown Value can be changed from 0 to 20 of Operating Range Value Lockdown

Values can be changed in 1 increments The recommended standard is 5

Field Setup

Menu

Operating Range Lockdown (0-20)

Zero Calibration (5)

Engineering Units Delay (0-20 sec)

Lockdown (2) Sec

4842 Lockdown Delay

The Lockdown Delay Menu allows the user to enter a lockdown time delay (0-20 seconds) that

will delay the display and output lockdown from occurring until the flow value or output value

has remained below the lockdown value for that duration

Field Setup

Menu

Operating Range Lockdown (0-20)

Zero Calibration (5)

Engineering Units Delay (0-20 sec)

Lockdown (2) Sec

21

Flow Correction 485

The Flow Correction Menu was incorporated into the AAON Airflow Signal Processor to give

the user an easy way to make corrections to the display and output without changing the

Operating Range Value entered by the factory or user The Flow Correction Menu would be

used to correct for a constant error from zero to the entered Operating Range Value

4851 Flow Correction (K-Factor)

If the user knows the change required to match the balancers reading select the K-Factor

Menu and enter this value for the K-Factor The minimum and maximum allowable K-Factor

Value is displayed in the K-Factor Menu

Field Setup

Menu

Flow Correction Flow Correction

AutoZero K-Factor K-Factor Range

Temp Comp (085 13)

Display Filter K-Factor Calc K=(01000)

4852 Flow Correction (K-Factor Calculator)

If the new K-factor Value needs to be calculated select the K-Factor Calc Menu Enter the

Displayed Value on the AAON Airflow Signal Processor and actual Measured Value press

Enter and the change will be calculated and stored as the new K-Factor Value

Field Setup

Menu

Flow Correction Displayed Value

AutoZero K-Factor (000000)

Temp Comp Measured Value

Display Filter K-Factor Calc (000000)

-FLOW CORRECTION EXAMPLE-

The balancer is consistently measuring a value of 9500 CFM which is 500 CFM less than the

10000 CFM value on the AAON Airflow Signal Processor display The user would then

perform the following math function Measured Value Displayed Value = K-Factor so 9500

CFM 10000 CFM = 0950 The user would enter 0950 for the K-Factor Flow Correction If

the K-Factor Calculator is used the K- Factor Flow Correction would automatically update the K

Factor

AutoZero 486

The AutoZero feature corrects any zero offset caused by large ambient temperature changes

22

4861 AutoZero Status

The AutoZero Status Menu allows the user to turn the AutoZero function ON or OFF

Field Setup

Menu

Flow Correction AZ Status AZ Status

AutoZero AZ Interval (ONOFF)

Temp Comp AZ Test Interval

Display Filter (ON)

4862 AutoZero Interval

The AutoZero Interval Menu allows the user to select the AutoZero Interval from once an hour

to once a day in 1 hour increments Use the UPDOWN keys to select the interval value Upon

device power up an AutoZero cycle will occur after 20 seconds

Field Setup

Menu

Flow Correction AZ Status AZ Interval

AutoZero AZ Interval (1 TO 24HR)

Temp Comp AZ Test Interval

Display Filter (01)HR

4863 AutoZero Test Interval

For troubleshooting or testing the AutoZero function the AutoZero Test Interval Menu allows

the user to select an Auto Zero test frequency of once a minute to once every 30 minutes in 1

minute increments Use the UPDOWN keys to select the interval value If AutoZero Test

Interval is turned ON for more than 60 minutes it will automatically default to OFF and the

AutoZero Interval (see Section 4862) will be reactivated

Field Setup

Menu

Flow Correction AZ Status AZ Test Interval

AutoZero AZ Interval (OFF)

Temp Comp AZ Test Interval Interval

Display Filter (1)Min

Temperature Compensation 487

The Temperature Compensation option compensates the flow and velocity signal for density

changes caused by variations in the process air temperature An input signal from AAON

Temperature Transmitter is required see Section 33 for proper temperature transmitter

connection and Section 452 for temperature input signal configuration

23

4871 Temperature Units

The Temperature Units Menu allows the user to select the appropriate temperature units for the

job The default setting is ordmF

Field Setup

Menu

Flow Correction Temperature Units Units

AutoZero Temperature Values (ordmF ordmC)

Temp Comp Temperature Input

Display Filter Fixed Value (ordmF)

4872 Temperature Values

The Temperature Values Menu allows the factory or user to set the minimum and maximum

temperature range values that represent the input signal from the external temperature transmitter

or the building automation system Since the AAON Temperature Transmitter has been supplied

the minimum and maximum temperature range values of -30degF to 130degF have been

preprogramed

Field Setup

Menu

Flow Correction Temperature Units Minimum Value

AutoZero Temperature Values (-030)

Temp Comp Temperature Input Maximum Value

Display Filter Fixed Value (130)

If the temperature values are changed from the factory settings and the new temperature values

cause the existing Operating Range Value to be outside the new calculated Minimum or

Maximum Full Scale Value the below Warning Message will appear and the Operating Range

will be reset to the new Maximum Full Scale Value by pressing Enter The display will

automatically jump to the Operating Range Menu allowing the user to enter a new Operating

Range Value This can be accomplished by performing the steps under Section 481 See

Temperature Range Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

24

Minimum Value

(-000)

Maximum Value

(000)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Min amp

Max Temperature

value and pressing the

Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Temperature Range Example-

Minimum Value

(-000)

Accepted

(100)

4873 Temperature Input

The Temperature Input Menu allows the user to select between three temperature input options

(Fixed Variable and Network) for the flow calculations Since the AAON Temperature

Transmitter has been supplied Variable has been selected If Fixed is selected the default

temperature value entered in the Fixed Value Menu (see Section 4874) is used If Net is

selected the temperature input signal is obtained through network communications The Net

option is only available if one of the communication options is ordered The temperature value

is only displayed on the LCD screen if the Temperature Input is set to Variable or Network

Field Setup

Menu

Flow Correction Temperature Units Temp Input

AutoZero Temperature Values (FixVarNet)

Temp Comp Temperature Input

Display Filter Fixed Value (Variable)

25

4874 Fixed Value

The Fixed Value Menu allows the user to enter a temperature value for the flow calculations

This value will not be displayed on the LCD screen

Field Setup

Menu

Flow Correction Temperature Units Fixed Value

AutoZero Temperature Values (˚F)

Temp Comp Temperature Input

Display Filter Fixed Value (+068)

Display Filter 488

The Display Filter Menu allows the user to adjust the Display Filter rolling average algorithm by

setting the Sample Interval Time value in seconds and the number of rolling average Sample

Counts The adjustment range of the Sample Interval Time is 010 to 655 seconds in 010

increments The Sample Count range is 0 to 150 Sample Counts The Display Filter is

independent of the Process Output Filter Value (See Section 489)

Field Setup

Menu

Flow Correction Sample Interval Time

AutoZero (005)sec

Temp Comp (0-150) Sample Count

Display Filter (010)

Process Output Filter 489

The Process Output Filter Menu allows the user to adjust the Process Output Filters rolling

average algorithm by setting the Sample Interval Time value in seconds and the number of

rolling average Sample Counts The adjustment range of the Sample Interval Time is 010 to

655 seconds in 010 increments The Sample Count range is 0 to 150 Sample Counts The

Process Output Filter is independent of the Display Filter Value (See Section 488)

Field Setup

Menu

Output Filter Sample Interval Time

Alarm Options (005)sec

Factory Defaults (0-150) Sample Count

(010)

26

HighLow Alarm Option 4810

The following menus for configuration of HighLow Alarms are only available if the HighLow

Alarm option is purchased

48101 Alarm Status

The Alarm Status allows the user to independently turn each alarm ON or OFF

Field Setup

Menu

Output Filter Alarm Status Low Alarm

Alarm Options Alarm Value (On)

Factory Defaults Alarm Delay High Alarm

(On)

48102 Alarm Values

The Alarm Value Menu allows the user to enter the Low or the High flow alarm value Alarm

values will be displayed in the same engineering units selected in the Eng Units Menu (see

Section 483)

- High Alarm Function The High Alarm activates if the flow exceeds the High Alarm

value and resets when the flow drops below the High Alarm Value

- Low Alarm Function The Low Alarm activates if the flow drops below the Low

Alarm Value and resets when the flow exceeds the Low Alarm Value

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Value

Alarm Options Alarm Value (000000)

Factory Defaults Alarm Delay Hi Alarm Value

(100000)

48103 Alarm Delay

The Alarm Delay Menu allows the user to enter an alarm delay of 0 to 999 seconds before an

alarm will be activated The alarm will be reset without a delay

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Delay

Alarm Options Alarm Value (000)Seconds

Factory Defaults Alarm Delay Hi Alarm Delay

(000)Seconds

27

Factory Defaults 4811

If parameter configuration changes have been made incorrectly to the AAON Airflow Signal

Processor all device settings can be restored to the original AAON factory settings by selecting

YES and pressing Enter in both the Set To Factory Defaults Menu and the Verify Set To Factory

Defaults Menu (see Table 7 below for a list of Saved Settings)

Field Setup

Menu

Output Filter Set To Verify Set To

Alarm Options Factory Defaults Factory Defaults

Factory Defaults

(No) (No)

Table 7 - Factory Defaults

Item Saved Setting Item Saved Setting

1 All Factory Calibration Points (12) 14 MAC Address

2 Area Factor 15 Instance Number

3 Operating Range 16 Engineering Units

4 4 Pt Flow Correction 17 Display Filter Values

5 Altitude 18 Output Filter

6 K-Factor 19 DP Display Format

7 Lockdown amp Delay Values 20 Output Calibration

8 Flow Correction 21 AutoZero Status

9 Flow Coefficient 22 AutoZero Interval

10 Min amp Max Temp Range Values 23 Temp Units

11 Alarm Status 24 Temp Input

12 Alarm Values 25 Temp Fixed Value

13 Alarm Delay 26 Baud Rate

28

49 TECH CONFIGURATION MENUS

To set parameters under the Tech Configuration Menu refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 491

through 4911 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

Area Factor 491

To convert the differential pressure signal from the AAON Airflow Station to a flow value the

Area Factor associated with the AAON Airflow Station has been preprogramed by the factory

If the Area Factor needs to be checked or reconfigured the correct Area Factor for the AAON

Airflow Station can be found on the AAON Airflow Station product label installed in the air

handling unit

Tech Config

Password 1000

Area Factor Area Factor

Min Calibration (FT2)

Span Calibration

Altitude (001000)

29

If the Area Factor is reconfigured and the new Area Factor causes the existing Operating Range

Value to be outside the new calculated Minimum or Maximum Full Scale Value the below

Warning Message will appear and the Operating Range will be reset to the new Maximum Full

Scale Value by pressing Enter The display will automatically jump to the Operating Range

Menu allowing the user to enter a new Operating Range Value This can be accomplished by

performing the steps under Section 481 See Area Factor Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Area Factor

(FT )

(001000)

Area Factor

(FT )

Accepted

(001200)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Area

Factor and pressing

the Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Area Factor Example-

2

2

30

Minimum Calibration 492

The Minimum Calibration Menu allows a user to perform a minimum transducer calibration

This value will be placed in a different memory location and used until a Return to Factory

Defaults is selected (see Section 4811)

(Caution Before performing a minimum calibration disconnect the Total (High) and Static

(Low) Pressure connections perform a minimum calibration and then reconnect the Total

and Static Pressure connections)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00000) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Span Calibration 493

The Span Calibration Menu allows the user to perform a span transducer calibration to eliminate

any possible transducer drift This value will be placed in a different memory location than the

Factory Span memory location and used until a Return to Factory Defaults is selected (see

Section 4811)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00570) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Altitude 494

The Altitude Menu allows the user to enter the specific altitude for the job for the density

calculations the job specific site Altitude has been preprogramed by the factory

Tech Config

Password 1000

Area Factor Altitude

Min Calibration

Span Calibration (0000)Ft

Altitude

31

If the Altitude is changed from the factory setting and the new Altitude causes the existing

Operating Range Value to be outside the new calculated Minimum or Maximum Full Scale

Value the below Warning Message will appear and the Operating Range will be reset to the new

Maximum Full Scale Value by pressing Enter The display will automatically jump to the

Operating Range Menu allowing the user to enter a new Operating Range Value This can be

accomplished by performing the steps under Section 481 See Altitude Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Altitude

(0000)Ft

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Altitude

and pressing the Enter

button will calculate

new Min amp Max Op

Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Altitude Example-

Altitude

Accepted

(0100)Ft

32

Process Output Calibration 495

4951 Minimum Calibration

The Minimum Calibration Menu allows the user to make output zero adjustments Monitor the

output and with each Up or Down key depression the output will increase or decrease by

001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

4952 Span Calibration

The Span Calibration Menu allows the user to make output span adjustments Span adjustments

require a low pressure air source adjusted to the Full Scale Value shown on the side label

Monitor the output and with each Up or Down button depression the output will increase or

decrease by 001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

Probe Coefficient 496

The Probe Correction Coefficient Menu allows the user to modify the formula constant of

109670 used for non-amplified Pitot-type flow sensors

Tech Config

Password 1000

Output Calibration Correction Coeff

Correction Coeff Probe

4PT Flow Corr (109670)

MAC Address (00109670)

33

Four Point Flow Correction 497

The Four Point Flow Correction Menu allows the user to make corrections to the display and

output signal at 20 increments between 20 and 80 of the Operating Range Value entered

The Displayed Value is a fixed value determined by the percentage of Operating Range The

Measured Value is the value determined by an independent balancerrsquos reading

Tech Config

Password 1000

Output Calibration 80000 CFM Displayed Value

Correction Coeff 60000 CFM 80000

4PT Flow Corr 40000 CFM Measured Value

MAC Address 20000 CFM 79500

80000 CFM Displayed Value

60000 CFM 60000

40000 CFM Measured Value

20000 CFM 60500

80000 CFM Displayed Value

60000 CFM 40000

40000 CFM Measured Value

20000 CFM 40100

80000 CFM Displayed Value

60000 CFM 20000

40000 CFM Measured Value

20000 CFM 19500

MAC Address (BACnet Communication Option) 498

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network The default is 002 For

additional information refer to Section 411

Tech Config

Password 1000

Output Calibration MAC Address

Correction Coeff (Range = 02 to 254)

4PT Flow Corr

MAC Address (002)

34

Instance Number (BACnet Communication Option) 499

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The default is 1002 For

additional information refer to Section 411

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (Default = 1002)

Instance Number

Modbus ID (01002)

Modbus ID (Modbus Communication Option) 4910

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network The default is 002 For

communication with WattMaster Controls the Modbus ID has been set by the factory to 009 for

outside airflow applications For additional information refer to the Section 411

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

Baud Rate (BACnet amp Modbus Communication Options) 4911

The Baud Rate Menu allows the user to set a unique network baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate Modbus communications supports

96 192 384 576 and 1152 Kbps baud rate The default is 384 Kbps For communication

with WattMaster Controls the Baud Rate has been set by the factory to 96 Kbps For additional

information refer to Section 411

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

35

410 WARNING MESSAGES

Input Pressure Overrange Message 4101

If the input pressure exceeds the entered Operating Range Value the following message will

appear on the display It will alternate between the process display and the error message until

the input falls below the Operating Range Value

- Caution -

Input Beyond

Operating Range

Selected

Transducer Calibration Message 4102

If during a transducer zero or span calibration process the transducer output pressure value

measured exceeds plusmn20 of the expected value the following message will appear on the display

Once the Enter button is pressed the display returns to the previous calibration menu

Value entered is

Outside Factory

set limits

(Press Enter)

Operating Range Message 4103

If the new values entered for Temperature Compensation Area Factor or Altitude (see Sections

487 491 and 494) causes the Operating Range Value to exceed the new calculated

Maximum Full Scale Value the following message will appear on the display

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

New Operating Range Message 4104

If a user enters a new Operating Range Value the following message will appear on the display

notifying the user that if any 4 PT Flow Correction Values (see Section 497) were previously

entered they will be reset The message allows the user to confirm that the Operating Range

change should be made To complete the Operating Range change the user must use the

UPDown buttons to change the NO to a YES and press the ENTER button

Value will

Reset 4PT

Flow Correction

Values

Make the Change

(NO)

(Press Enter)

36

411 NETWORK COMMUNICATION

The AAON Airflow Signal Processor can be ordered with BACnet Modbus or LonWorks

Communication For BACnet Communication the AAON Airflow Signal Processors utilize

MSTP (Master SlaveToken Passing) BACnet type protocol BACnet is implemented using

EIA-485 signaling standards through a shielded twisted pair wire operating at a baud rate of 96

Kbps to 768 Kbps Each device has a unique MAC Address ranging from 2 to 127 Refer to

Section 4113 for BACnet Protocol Implementation Conformance Statements (PICS) For

Modbus Communication the AAON Airflow Signal Processors utilize the Modbus ndash RTU Slave

protocol using EIA-485 signaling standards through a shielded twisted pair wire operating at a

baud rate of 96 Kbps to 1152 Kbps Each device has a unique Modbus ID ranging from 1 to

254 Refer to Section 4114 for Modbus software configuration parameters For LonWorks

Communication each AAON Airflow Signal Processor has a unique Neuron Chip ID which is

loaded on the network by pressing a service switch located on the main board (see Section

4111 Figure 7) The LonWorks network utilizes a shielded twisted pair wire operating at a

fixed baud rate of 78 Kbps Refer to Section 4115 for LonWorks network variables

Sections 4111 and 4112 contain procedures for electrical connection of the AAON Airflow

Signal Processor to the network and for configuring the required communication parameters

Electrical Connection 4111

The following procedure outlines the steps for installing the interface wiring for network

communication Network wire should be low capacitance shielded 22 or 24 AWG twisted pair

with PVC jacket such as Belden Part numbers 9841 3105A or equivalent

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Verify that the Power Switch (S3) is in the OFF position and install the interface

wiring for Pins 9 and 10 as shown in Figure 7 If multiple AAON Airflow Signal

Processors will be connected to the same network see Figure 8 for connecting

multiple devices For network systems that require all devices to have a common

signal ground refer to Figure 9 for electrical connection The J2 electrical

connector has a removable terminal block for ease of installing the interface

wiring

Step 4 For proper operation of BACnet and Modbus communication networks the

device that is electrically installed at the end of the network may require the

Terminator Switch be moved to the ON position to prevent line and data

reflection If Terminator is required it must be applied to both physical ends of

the network All other devices should have the Terminator Switch in the OFF

position The communication board is located on the back side of the main

AAON Airflow Signal Processor board See Figure 10 below for Terminator

Switch location on the communication board

Step 5 For LonWorks Communication refer to Figure 7 for the location of the Lon

Service Pin

37

Step 6 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 7 Configure the required parameters as outlined in Section 4112

Step 8 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

RP1

S3

NETWORK

COMMUNICATION+

-

LON

SERVICE PIN

Figure 7 - Network Communication Electrical Connection

38

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

AAON AIRFLOW

SIGNAL PROCESSOR

CONNECT ONLY ONE END OF SHIELD

WIRE TO EARTH GROUND AS SHOWN

SET TERMINATOR SWITCH

ON IF REQUIRED

NETWORK

COMMUNICATIONS

NETWORK

CONNECT SHIELD

WIRES TOGETHER

CONNECT SHIELD

WIRES TOGETHER

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not

Requiring Common Signal Grounds

Note If using two conductor communication wire use the shield wire to connect all device signal grounds together as shown in the figure below If using three conductor communication wire use the 3rd conductor to connect all device signal grounds together and connect one side of the shield to earth ground

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

SIGNAL

GROUND

8

J2

SIGNAL

GROUND

8

J28

J2

USE SHIELD WIRE OR 3RD CONDUCTOR TO

CONNECT DEVICE SIGNAL GROUND TO

NETWORK SIGNAL GROUND

SET TERMINATOR SWITCH

ON IF REQUIRED

AAON AIRFLOW

SIGNAL PROCESSOR

NETWORK

COMMUNICATIONS

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

SIGNAL

GROUND

SIGNAL

GROUND

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds

39

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location

COMMUNICATION BOARD ID

BOARD SERIAL NO

40

Parameter Configuration 4112

If BACnet or Modbus communication is ordered the associated settings will need to be

configured with the exception of Modbus communication with WattMaster Controls which has

been configured at the factory To set the parameters refer to the following procedure below

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 41121

through 41124 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

41121 MAC Address (BACnet Communication Option)

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network Each AAON Airflow Signal

Processor must have a unique MAC Address assigned ranging from 2 to 127

Tech Config

Password 1000

4PT Flow Corr MAC Address

MAC Address (Range = 02 to 254)

Instance Number

Modbus ID (002)

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 5: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

5

1 INTRODUCTION

11 DESCRIPTION

The AAON Outdoor Airflow Measurement System includes an airflow station airflow signal

processor and temperature transmitter and is capable of producing an overall plusmn05 accuracy

through the velocity range of 200 to 1200 fpm and plusmn5 accuracy at 100 fpm

The airflow station consists of multiple airflow elements factory mounted in the air handling

unit and pre-piped to the airflow signal processor Optional inlet bells are used for high turn

down or low velocity applications Standard materials consist of a G90 galvanized casing and

6063-T5 anodized aluminum flow sensors suitable for most HVAC applications The airflow

averaging elements are head type devices which generate a differential (velocity) pressure signal

similar to the orifice venturi and other head producing primary elements The airflow station is

constructed so as to comply with ASHRAE Standard 111 for equal area traversing of an airflow

measurement plane Multiple elements are manifolded together for connection to the airflow

signal processor

The airflow signal processor utilizes current state-of-the-art digital microprocessor technology

capable of producing unequaled 24-bit (16777216 steps) AD and 12 bit (4096 steps) DA

signal conversion resolution The ultra-low operating range and auto zeroing function of the

airflow signal processor provides accurate airflow measurement down to 100 fpm The signal

processor accepts a temperature input signal for air temperature indication temperature signal

transmission for remote readout and air density compensation for standard or actual airflow

calculations A password protected configuration menu provides quick and simple field

configuration by authorized personnel Field configuration of engineering units process noise

filtering operating range alarm set points etc are performed via user friendly menus and a six

button touch pad Device monitoring and configuration can also be performed by a building

management system through an optional LonWorksreg BACnetreg-MSTP Master or Modbusreg

Slave communication network Optional features also include HighLow Remote Alarms

A temperature transmitter with 4-20mA output and temperature range of -30 to 130degF is included

in the installation to provide a temperature input signal to the airflow signal processor for air

density calculations

6

12 BASIC OPERATION

The airflow station produces pneumatic output signals referred to as total (high) and static (low)

pressure These two pressures are piped to the airflow signal processor where the static pressure

is subtracted from the total and the result indicated as velocity pressure (differential pressure)

This measured differential pressure is equal to the average velocity of the air stream moving

through the plane that the airflow station is located in This signal can be converted to air

velocity and flow using the following equations

a

aT

460

921293251

a

VPV

71096

AVQ

Where

a Actual density of air in lbft3 (0075 lbft

3 at sea level and 68degF)

aT = Actual temperature in degF (default value is 68degF)

PV = Velocity pressure in inches H2O

V = Velocity in fpm

Q = Flow in cfm

A = Area in ft2

This signal is scaled and linearized before being displayed and transmitted out as a 4-20mA 0-

5VDC or 0-10VDC signal

The AutoZero feature corrects any zero offset caused by large ambient temperature changes

The Temperature Compensation feature compensates the flow signal for density changes caused

by variations in the air temperature

7

2 AIRFLOW STATION

21 SPECIFICATIONS

Material 211

Elements - 6063-T5 anodized aluminum

Casings - 16 ga G90 galvanized steel

Temperature 212

350F continuous operation (in air)

400F intermittent operation (in air)

Humidity 213

0 to 100 non-condensing

Instrument Connections 214

frac14rdquo compression suitable for use with thermoplastic or copper tubing thermoplastic tubing

requires the use of tubing inserts

22 MAINTENANCE

Since the sensing elements have no moving parts only periodic cleaning may be required The

sensing elements should be inspected for fouling of the sensing holes as part of an annual

preventative maintenance program Installations having viscous airborne particles may require

more frequent inspection If the sensing holes on the elements have become fouled or plugged

the following procedure is recommended Although the sensing elements are not fragile by

design care must be taken not to damage or disfigure the cylinder surface when handling

Particular attention must be given to the surface areas in which sensing ports are located

Caution prior to performing the following cleaning procedure the AAON Airflow Signal

Processor must be isolated by disconnect the Total (High) and Static (Low) Pressure

connections on the AAON Airflow Station

- Backpurging Connect cleandry compressed air set at a maximum pressure of 25

psi to the output pressure ports (total andor static) of the sensing element being

cleaned While purging the sensing element wipe the surface of the cylinder with a

cloth or brush to loosen and remove all contaminant buildup

- Cleaning In applications where the sensing elements are subject to viscous

contaminants it is recommended that the surface be washed with a cleaning agent

The cleaning agent used must be suitable for use on aluminum

8

3 TEMPERATURE TRANSMITTER

31 SPECIFICATIONS

Supply Voltage 311

85 to 32VDC

Combined Accuracy (Linearity Hysteresis and Repeatability) 312

plusmn020 of full scale

Temperature Range 313

-30degF to 130degF

Output 314

4-20mA

32 DIMENSIONS

TEMPERATURETRANSMITTER

Model ATT-1

AAON PN V28580

255

370

222

PG1116KNOCKOUT(TYP OF 6)

325

725(STANDARD)

reg

33 ELECTRICAL CONNECTION

All electrical connections from the AAON Temperature Transmitter to the AAON Airflow

Signal Processor have been made at the factory as shown in Figure 1 below Figure 2 shows the

AAON Temperature Transmitter positive and negative connector locations The following

procedure outlines the steps for checking the interface wiring if required

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

9

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor and

the AAON Temperature Transmitter cover by turning each screw counter

clockwise

Step 2 Remove the covers

Step 3 Verify that the Power Switch (S3) on the AAON Airflow Signal Processor is in

the OFF position

Step 4 Confirm the installation of the interface wiring for Pins 4 and 5 on the AAON

Airflow Signal Processor are connected to the positive and negative connectors on

the AAON Temperature Transmitter as shown in Figures 1 and 2 The three

electrical connectors (J1 J2 and optional J3) on the AAON Airflow Signal

Processor have removable terminal blocks for ease of installing the interface

wiring

Step 5 Verify that the Temp Input Switch (S1) on the AAON Airflow Signal Processor is

set to the mA position

Step 6 Turn the Power Switch (S3) on the AAON Airflow Signal Processor to the ON

position see Section 461 and 462 for display descriptions

Step 7 Replace the covers by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

(4-20mA LOOP

POWERED)+

- TRANSMITTER

S1S2 S4

+ 24VDC OUTPUT POWER

- TEMPERATURE INPUT(GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATIONS

- NETWORK COMMUNICATIONS

- PROCESS OUTPUT(GND)

+ PROCESS OUTPUT

8

10

9

4

6

7

5

J2

TEMPERATURE

S1 SET TO

mA POSITION

Figure 1 - Electrical Connections

10

+-

4-2

0m

A C

urre

nt L

oop

BACK SIDE OF COVER

RTD CONNECTION

Figure 2 - Temperature Transmitter Positive amp Negative Connectors

11

4 AIRFLOW SIGNAL PROCESSOR

41 SPECIFICATIONS

Power Supply 411

20 to 28 VACDC

Power Consumption 412

250mA at 24VAC

175mA at 24VDC

Accuracy 413

plusmn025 full scale

Temperature Input 414

4-20mA

Process Output Options 415

0-5VDC

0-10VDC

4-20mA (700Ω maximum load)

HighLow Alarm Relay Outputs 416

Two single (1 form C) dry contacts rated for

5 amps at 30VACDC

10 amps at 120VAC

42 SAFETY

Electrical Connections 421

Before any electrical connections are made ensure the POWER SWITCH is in the OFF

position

Static Electricity 422

The circuit board contains components which are susceptible to damage caused by static

electrical discharge Should it be necessary to remove the circuit board from the enclosure

appropriate precautions must first be taken to ensure that the operator and the circuit board are at

the same electrical potential

12

43 DIMENSIONS

100000ACFM

75 F

J1 J2

TOTALCONNECTION

STATICCONNECTION

462

5785

2265

350

525

Air Fl o wS IGN AL PROCES S OR

AAON

44 ELECTRICAL amp PNEUMATIC CONNECTIONS

All electrical and pneumatic connections to the AAON Airflow Signal Processor have been

made at the factory as shown in Figures 3 through 5 below with the exception of the electrical

connection for the HighLow Alarm Option if ordered and for network communication options

other than with WattMaster Controls The following procedure outlines the steps for turning

ON the AAON Airflow Signal Processor if network communication is required see Section

411 prior to turning ON the AAON Airflow Signal Processor

Caution ndash If electrical connections need to be rewired all electrical connections must be made

with the AAON Airflow Signal Processor Power Switch in the OFF position The three

electrical connectors (J1 J2 and optional J3) have removable terminal blocks for ease of

installing the interface wiring

13

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 4 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

(24VACDC)

POWER SUPPLY

ANALOG RECEIVING DEVICE

PROCESS OUTPUT

S1S2 S4

+

-

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

SWITCH POSITIONS

SHOWN IN BLACK

S1 POSITION

INDICATING 4-20mA

TEMPERATURE INPUT

S2 AND S4 POSITIONS

INDICATING 0-10VDC

PROCESS OUTPUT

RP1

S3

AAON

TEMPERATURE

TRANSMITTER

(4-20mA LOOP POWERED)+

-

Figure 3 - Electrical Connections

14

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROCOUTPUT

mA

V

10V

5V

(24VACDC)

POWER SUPPLY

ANALOG RECEIVING DEVICE

PROCESS OUTPUT

S1S2 S4

+

-

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

SWITCH POSITIONS

SHOWN IN BLACK

S1 POSITION

INDICATING 4-20mA

TEMPERATURE INPUT

S2 AND S4 POSITIONS

INDICATING 0-10VDC

PROCESS OUTPUT

RP1

S3

E-BUS DISTRIBUTION MODULE

+-

AAON

TEMPERATURE

TRANSMITTER

(4-20mA LOOP POWERED)+

-

- COMM

+ COMM

GND

THE SHIELDING WIRE SHOULD BE USED TO

CONNECT WATTMASTER GROUND TO AIRFLOW

SIGNAL PROCESSOR GROUND

Figure 4 - Electrical Connection with Wattmaster Controls

15

J1 J2

TOTAL

CONNECTION

STATIC

CONNECTION

TOTAL PRESSURE CONECTION

AAON AIRFLOW STATION

STATIC PRESSURE CONNECTION

AAON AIRFLOW STATION

Figure 5 - Pneumatic Connections

45 INPUTOUTPUT SET-UP

If input or output configuration changes are required refer to the Tables 1 and 2 in the sections

below and Figure 3 in Section 44

Process Output 451

If controls are provided by AAON the process output has been set by the factory for input to the

specific controller otherwise the default is 0-10VDC To change the output configuration set

the S2 amp S4 switches as follows

Table 1 - Process Output Switch Configuration

Process Output Range S2 S4

Current 4-20mA NA mA

Voltage 0-10VDC 10V V

Voltage 0-5VDC 5V V

Temperature Input 452

Since the AAON Temperature Transmitter has been provided the temperature input has been set

by the factory for 4-20mA To change the input configuration set the S1 switch as follows

Table 2 - Temperature Input Switch

Configuration

Temperature Input S1 Switch Selection

4-20mA mA

0-10VDC V

16

46 ACTIVE DISPLAYS amp KEY FUNCTIONS

Power-up Initiation Display 461

Upon initial power-up Software Revision information will be displayed on the graphic display

for approximately 5 seconds

EQ-1

Software Rev XXXXX

Modbus Rev XXXXX

Process Display Descriptions 462

After power-up initialization the following information will appear on the graphic display

depending upon the options purchased

75˚F

75˚F

75˚F

000000

000000

000000

AutoZero

ACFM

High Alarm

ACFM

Low Alarm

ACFM

Flow Monitoring with an

Auto Zero Cycle

Flow Monitoring with a

High Alarm Condition

Flow Monitoring with a

Low Alarm Condition

Table 3 - Process Display Descriptions

Number Description

1 Process value

2 Air Flow temperature units in degree F or C

3 Flashing Asterisk indicates the CPU is functioning

4 Engineering units

5 Displayed during an AutoZero cycle

6 Indicating High Alarm Value has been exceeded (HighLow Alarm Option)

7 Indicating Low Alarm Value has been exceeded (HighLow Alarm Option)

12 3

4

6

7 5

17

Key Functions 463

The following figure and description identify the function of each Key

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

2

13

4

567

8

RP1 9

Figure 6 - Key Functions

Table 4 - Key Functions

Number Description

1 Enter Key - Allows a user to enter into the Field Menu enter into a selected menu item

or store into memory changes made to the program

2 Up Key - Allows the user to scroll up in the menu list to a selected item or increase digits

when making value changes

3 Right Key - When making changes to user values the Right Key allows the user to scroll

to the correct digit for changes

4 Down Key - Allows the user to scroll down in the menu list to a selected item or

decrease digits when making value changes

5 Left Key - When making changes to user values the Left Key allows the user to scroll to

the correct digit for changes

6

Escape Key - The Escape Key allows the user to back out of the menu to the Active

Display If a user starts to make a change and decides to cancel the change the Escape

Key will allow the user to return to the Active Display without making the change

7 Power Switch ndash Allows a user to turn power off to the AAON Signal Processor during

field wiring or modifications to the device

8 Lon Switch ndash Allows a user to send a unique Neuron device ID when connecting to a

LonWorks communication network

9 RP1 ndash Allows a user to adjust the display contrast

18

47 DISPLAY MENUS

Table 5 shows the Field Setup and Tech Configuration Menus The display will vary depending

upon the options purchased

Table 5 - Display Menus

Field Setup Menu

(Press ENTER Key)

Tech Configuration Menu

(Press UPDOWN Keys simultaneously)

(Enter Password number 1000)

(Press ENTER Key)

Operating Range Area Factor

Zero Calibration Min Calibration

Eng Units Span Calibration

Lockdown Temp Fixed Value

Flow Correction Altitude

AutoZero Output Calibration

Temp Comp Correction Coeff

Display Filter 4PT Flow Corr

Output Filter MAC Address (Optional)

Alarm Options (Optional) Instance Number (Optional)

Factory Defaults Modbus ID (Optional)

Baud Rate (Optional)

48 FIELD SETUP MENUS

To set parameters under the Field Setup Menus refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Field Setup Menu by depressing and holding the Enter Key for 5

seconds

Step 2 Once in the Field Setup Menu use the UpDown Keys to highlight the

required parameter for configuration as shown in Sections 481 through

4811 Press the Enter Key once to access the highlighted parameter

Menu

Step 3 Once in the parameter menu the parameter can be changed using

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Field

Setup Menu

Step 4 After all of the required parameters have been configured exit the Field

Setup Menu by pressing the ESC Key The Process Display (see Section

462) will then be displayed

19

Operating Range 481

The Operating Range allows the user to enter a value which will represent 100 of the process

output signal (5VDC 10VDC or 20mA) The Operating Range Value has been set by the

factory to equal 110 of the design supply flow rate unless this value is less than the Minimum

Full Scale Value allowed for the AAON Airflow Signal Processor The menu will display the

Minimum Full Scale Value allowed which is then entered as the Operating Range

Field Setup

Menu

Operating Range Operating Range

Zero Calibration ( ACFM )

Engineering Units (6000-12000)

Lockdown (010000)

Zero Pressure Calibration 482

The Zero Calibration Menu allows the user to perform a zero transducer calibration to eliminate

any transducer zero shift

(Caution Before performing a zero calibration disconnect the Total (High) and Static (Low)

pressure connections perform a zero calibration and then reconnect the Total and Static

pressure connections)

Field Setup

Menu

Operating Range Input Value CPU Taking

Zero Calibration (0000) Inch wc Samples

Engineering Units

Lockdown (Press Enter) (Please Wait)

Engineering Units 483

Table 6 lists the engineering units that are available for the user to select from for display

purposes Changing the engineering units will affect the process display and the alarm value

menus The default setting is ACFM

Field Setup

Menu

Operating Range Eng Units

Zero Calibration

Engineering Units (ACFM)

Lockdown

20

Table 6 - Engineering Units

Standard

Flow

Units

Actual

Flow

Units

SCFM ACFM

SCFH LS

SLS Am3S

Sm3S Am3M

Sm3M Am3HR

Sm3HR

Lockdown 484

Due to the high square root gain associated with very low delta p values the display and process

output are locked to a zero value until the input value reaches the specified Lockdown Value that

was entered Above the Lockdown Value the output is linear to air flow

4841 Lockdown Value

The Lockdown Value can be changed from 0 to 20 of Operating Range Value Lockdown

Values can be changed in 1 increments The recommended standard is 5

Field Setup

Menu

Operating Range Lockdown (0-20)

Zero Calibration (5)

Engineering Units Delay (0-20 sec)

Lockdown (2) Sec

4842 Lockdown Delay

The Lockdown Delay Menu allows the user to enter a lockdown time delay (0-20 seconds) that

will delay the display and output lockdown from occurring until the flow value or output value

has remained below the lockdown value for that duration

Field Setup

Menu

Operating Range Lockdown (0-20)

Zero Calibration (5)

Engineering Units Delay (0-20 sec)

Lockdown (2) Sec

21

Flow Correction 485

The Flow Correction Menu was incorporated into the AAON Airflow Signal Processor to give

the user an easy way to make corrections to the display and output without changing the

Operating Range Value entered by the factory or user The Flow Correction Menu would be

used to correct for a constant error from zero to the entered Operating Range Value

4851 Flow Correction (K-Factor)

If the user knows the change required to match the balancers reading select the K-Factor

Menu and enter this value for the K-Factor The minimum and maximum allowable K-Factor

Value is displayed in the K-Factor Menu

Field Setup

Menu

Flow Correction Flow Correction

AutoZero K-Factor K-Factor Range

Temp Comp (085 13)

Display Filter K-Factor Calc K=(01000)

4852 Flow Correction (K-Factor Calculator)

If the new K-factor Value needs to be calculated select the K-Factor Calc Menu Enter the

Displayed Value on the AAON Airflow Signal Processor and actual Measured Value press

Enter and the change will be calculated and stored as the new K-Factor Value

Field Setup

Menu

Flow Correction Displayed Value

AutoZero K-Factor (000000)

Temp Comp Measured Value

Display Filter K-Factor Calc (000000)

-FLOW CORRECTION EXAMPLE-

The balancer is consistently measuring a value of 9500 CFM which is 500 CFM less than the

10000 CFM value on the AAON Airflow Signal Processor display The user would then

perform the following math function Measured Value Displayed Value = K-Factor so 9500

CFM 10000 CFM = 0950 The user would enter 0950 for the K-Factor Flow Correction If

the K-Factor Calculator is used the K- Factor Flow Correction would automatically update the K

Factor

AutoZero 486

The AutoZero feature corrects any zero offset caused by large ambient temperature changes

22

4861 AutoZero Status

The AutoZero Status Menu allows the user to turn the AutoZero function ON or OFF

Field Setup

Menu

Flow Correction AZ Status AZ Status

AutoZero AZ Interval (ONOFF)

Temp Comp AZ Test Interval

Display Filter (ON)

4862 AutoZero Interval

The AutoZero Interval Menu allows the user to select the AutoZero Interval from once an hour

to once a day in 1 hour increments Use the UPDOWN keys to select the interval value Upon

device power up an AutoZero cycle will occur after 20 seconds

Field Setup

Menu

Flow Correction AZ Status AZ Interval

AutoZero AZ Interval (1 TO 24HR)

Temp Comp AZ Test Interval

Display Filter (01)HR

4863 AutoZero Test Interval

For troubleshooting or testing the AutoZero function the AutoZero Test Interval Menu allows

the user to select an Auto Zero test frequency of once a minute to once every 30 minutes in 1

minute increments Use the UPDOWN keys to select the interval value If AutoZero Test

Interval is turned ON for more than 60 minutes it will automatically default to OFF and the

AutoZero Interval (see Section 4862) will be reactivated

Field Setup

Menu

Flow Correction AZ Status AZ Test Interval

AutoZero AZ Interval (OFF)

Temp Comp AZ Test Interval Interval

Display Filter (1)Min

Temperature Compensation 487

The Temperature Compensation option compensates the flow and velocity signal for density

changes caused by variations in the process air temperature An input signal from AAON

Temperature Transmitter is required see Section 33 for proper temperature transmitter

connection and Section 452 for temperature input signal configuration

23

4871 Temperature Units

The Temperature Units Menu allows the user to select the appropriate temperature units for the

job The default setting is ordmF

Field Setup

Menu

Flow Correction Temperature Units Units

AutoZero Temperature Values (ordmF ordmC)

Temp Comp Temperature Input

Display Filter Fixed Value (ordmF)

4872 Temperature Values

The Temperature Values Menu allows the factory or user to set the minimum and maximum

temperature range values that represent the input signal from the external temperature transmitter

or the building automation system Since the AAON Temperature Transmitter has been supplied

the minimum and maximum temperature range values of -30degF to 130degF have been

preprogramed

Field Setup

Menu

Flow Correction Temperature Units Minimum Value

AutoZero Temperature Values (-030)

Temp Comp Temperature Input Maximum Value

Display Filter Fixed Value (130)

If the temperature values are changed from the factory settings and the new temperature values

cause the existing Operating Range Value to be outside the new calculated Minimum or

Maximum Full Scale Value the below Warning Message will appear and the Operating Range

will be reset to the new Maximum Full Scale Value by pressing Enter The display will

automatically jump to the Operating Range Menu allowing the user to enter a new Operating

Range Value This can be accomplished by performing the steps under Section 481 See

Temperature Range Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

24

Minimum Value

(-000)

Maximum Value

(000)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Min amp

Max Temperature

value and pressing the

Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Temperature Range Example-

Minimum Value

(-000)

Accepted

(100)

4873 Temperature Input

The Temperature Input Menu allows the user to select between three temperature input options

(Fixed Variable and Network) for the flow calculations Since the AAON Temperature

Transmitter has been supplied Variable has been selected If Fixed is selected the default

temperature value entered in the Fixed Value Menu (see Section 4874) is used If Net is

selected the temperature input signal is obtained through network communications The Net

option is only available if one of the communication options is ordered The temperature value

is only displayed on the LCD screen if the Temperature Input is set to Variable or Network

Field Setup

Menu

Flow Correction Temperature Units Temp Input

AutoZero Temperature Values (FixVarNet)

Temp Comp Temperature Input

Display Filter Fixed Value (Variable)

25

4874 Fixed Value

The Fixed Value Menu allows the user to enter a temperature value for the flow calculations

This value will not be displayed on the LCD screen

Field Setup

Menu

Flow Correction Temperature Units Fixed Value

AutoZero Temperature Values (˚F)

Temp Comp Temperature Input

Display Filter Fixed Value (+068)

Display Filter 488

The Display Filter Menu allows the user to adjust the Display Filter rolling average algorithm by

setting the Sample Interval Time value in seconds and the number of rolling average Sample

Counts The adjustment range of the Sample Interval Time is 010 to 655 seconds in 010

increments The Sample Count range is 0 to 150 Sample Counts The Display Filter is

independent of the Process Output Filter Value (See Section 489)

Field Setup

Menu

Flow Correction Sample Interval Time

AutoZero (005)sec

Temp Comp (0-150) Sample Count

Display Filter (010)

Process Output Filter 489

The Process Output Filter Menu allows the user to adjust the Process Output Filters rolling

average algorithm by setting the Sample Interval Time value in seconds and the number of

rolling average Sample Counts The adjustment range of the Sample Interval Time is 010 to

655 seconds in 010 increments The Sample Count range is 0 to 150 Sample Counts The

Process Output Filter is independent of the Display Filter Value (See Section 488)

Field Setup

Menu

Output Filter Sample Interval Time

Alarm Options (005)sec

Factory Defaults (0-150) Sample Count

(010)

26

HighLow Alarm Option 4810

The following menus for configuration of HighLow Alarms are only available if the HighLow

Alarm option is purchased

48101 Alarm Status

The Alarm Status allows the user to independently turn each alarm ON or OFF

Field Setup

Menu

Output Filter Alarm Status Low Alarm

Alarm Options Alarm Value (On)

Factory Defaults Alarm Delay High Alarm

(On)

48102 Alarm Values

The Alarm Value Menu allows the user to enter the Low or the High flow alarm value Alarm

values will be displayed in the same engineering units selected in the Eng Units Menu (see

Section 483)

- High Alarm Function The High Alarm activates if the flow exceeds the High Alarm

value and resets when the flow drops below the High Alarm Value

- Low Alarm Function The Low Alarm activates if the flow drops below the Low

Alarm Value and resets when the flow exceeds the Low Alarm Value

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Value

Alarm Options Alarm Value (000000)

Factory Defaults Alarm Delay Hi Alarm Value

(100000)

48103 Alarm Delay

The Alarm Delay Menu allows the user to enter an alarm delay of 0 to 999 seconds before an

alarm will be activated The alarm will be reset without a delay

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Delay

Alarm Options Alarm Value (000)Seconds

Factory Defaults Alarm Delay Hi Alarm Delay

(000)Seconds

27

Factory Defaults 4811

If parameter configuration changes have been made incorrectly to the AAON Airflow Signal

Processor all device settings can be restored to the original AAON factory settings by selecting

YES and pressing Enter in both the Set To Factory Defaults Menu and the Verify Set To Factory

Defaults Menu (see Table 7 below for a list of Saved Settings)

Field Setup

Menu

Output Filter Set To Verify Set To

Alarm Options Factory Defaults Factory Defaults

Factory Defaults

(No) (No)

Table 7 - Factory Defaults

Item Saved Setting Item Saved Setting

1 All Factory Calibration Points (12) 14 MAC Address

2 Area Factor 15 Instance Number

3 Operating Range 16 Engineering Units

4 4 Pt Flow Correction 17 Display Filter Values

5 Altitude 18 Output Filter

6 K-Factor 19 DP Display Format

7 Lockdown amp Delay Values 20 Output Calibration

8 Flow Correction 21 AutoZero Status

9 Flow Coefficient 22 AutoZero Interval

10 Min amp Max Temp Range Values 23 Temp Units

11 Alarm Status 24 Temp Input

12 Alarm Values 25 Temp Fixed Value

13 Alarm Delay 26 Baud Rate

28

49 TECH CONFIGURATION MENUS

To set parameters under the Tech Configuration Menu refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 491

through 4911 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

Area Factor 491

To convert the differential pressure signal from the AAON Airflow Station to a flow value the

Area Factor associated with the AAON Airflow Station has been preprogramed by the factory

If the Area Factor needs to be checked or reconfigured the correct Area Factor for the AAON

Airflow Station can be found on the AAON Airflow Station product label installed in the air

handling unit

Tech Config

Password 1000

Area Factor Area Factor

Min Calibration (FT2)

Span Calibration

Altitude (001000)

29

If the Area Factor is reconfigured and the new Area Factor causes the existing Operating Range

Value to be outside the new calculated Minimum or Maximum Full Scale Value the below

Warning Message will appear and the Operating Range will be reset to the new Maximum Full

Scale Value by pressing Enter The display will automatically jump to the Operating Range

Menu allowing the user to enter a new Operating Range Value This can be accomplished by

performing the steps under Section 481 See Area Factor Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Area Factor

(FT )

(001000)

Area Factor

(FT )

Accepted

(001200)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Area

Factor and pressing

the Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Area Factor Example-

2

2

30

Minimum Calibration 492

The Minimum Calibration Menu allows a user to perform a minimum transducer calibration

This value will be placed in a different memory location and used until a Return to Factory

Defaults is selected (see Section 4811)

(Caution Before performing a minimum calibration disconnect the Total (High) and Static

(Low) Pressure connections perform a minimum calibration and then reconnect the Total

and Static Pressure connections)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00000) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Span Calibration 493

The Span Calibration Menu allows the user to perform a span transducer calibration to eliminate

any possible transducer drift This value will be placed in a different memory location than the

Factory Span memory location and used until a Return to Factory Defaults is selected (see

Section 4811)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00570) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Altitude 494

The Altitude Menu allows the user to enter the specific altitude for the job for the density

calculations the job specific site Altitude has been preprogramed by the factory

Tech Config

Password 1000

Area Factor Altitude

Min Calibration

Span Calibration (0000)Ft

Altitude

31

If the Altitude is changed from the factory setting and the new Altitude causes the existing

Operating Range Value to be outside the new calculated Minimum or Maximum Full Scale

Value the below Warning Message will appear and the Operating Range will be reset to the new

Maximum Full Scale Value by pressing Enter The display will automatically jump to the

Operating Range Menu allowing the user to enter a new Operating Range Value This can be

accomplished by performing the steps under Section 481 See Altitude Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Altitude

(0000)Ft

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Altitude

and pressing the Enter

button will calculate

new Min amp Max Op

Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Altitude Example-

Altitude

Accepted

(0100)Ft

32

Process Output Calibration 495

4951 Minimum Calibration

The Minimum Calibration Menu allows the user to make output zero adjustments Monitor the

output and with each Up or Down key depression the output will increase or decrease by

001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

4952 Span Calibration

The Span Calibration Menu allows the user to make output span adjustments Span adjustments

require a low pressure air source adjusted to the Full Scale Value shown on the side label

Monitor the output and with each Up or Down button depression the output will increase or

decrease by 001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

Probe Coefficient 496

The Probe Correction Coefficient Menu allows the user to modify the formula constant of

109670 used for non-amplified Pitot-type flow sensors

Tech Config

Password 1000

Output Calibration Correction Coeff

Correction Coeff Probe

4PT Flow Corr (109670)

MAC Address (00109670)

33

Four Point Flow Correction 497

The Four Point Flow Correction Menu allows the user to make corrections to the display and

output signal at 20 increments between 20 and 80 of the Operating Range Value entered

The Displayed Value is a fixed value determined by the percentage of Operating Range The

Measured Value is the value determined by an independent balancerrsquos reading

Tech Config

Password 1000

Output Calibration 80000 CFM Displayed Value

Correction Coeff 60000 CFM 80000

4PT Flow Corr 40000 CFM Measured Value

MAC Address 20000 CFM 79500

80000 CFM Displayed Value

60000 CFM 60000

40000 CFM Measured Value

20000 CFM 60500

80000 CFM Displayed Value

60000 CFM 40000

40000 CFM Measured Value

20000 CFM 40100

80000 CFM Displayed Value

60000 CFM 20000

40000 CFM Measured Value

20000 CFM 19500

MAC Address (BACnet Communication Option) 498

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network The default is 002 For

additional information refer to Section 411

Tech Config

Password 1000

Output Calibration MAC Address

Correction Coeff (Range = 02 to 254)

4PT Flow Corr

MAC Address (002)

34

Instance Number (BACnet Communication Option) 499

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The default is 1002 For

additional information refer to Section 411

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (Default = 1002)

Instance Number

Modbus ID (01002)

Modbus ID (Modbus Communication Option) 4910

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network The default is 002 For

communication with WattMaster Controls the Modbus ID has been set by the factory to 009 for

outside airflow applications For additional information refer to the Section 411

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

Baud Rate (BACnet amp Modbus Communication Options) 4911

The Baud Rate Menu allows the user to set a unique network baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate Modbus communications supports

96 192 384 576 and 1152 Kbps baud rate The default is 384 Kbps For communication

with WattMaster Controls the Baud Rate has been set by the factory to 96 Kbps For additional

information refer to Section 411

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

35

410 WARNING MESSAGES

Input Pressure Overrange Message 4101

If the input pressure exceeds the entered Operating Range Value the following message will

appear on the display It will alternate between the process display and the error message until

the input falls below the Operating Range Value

- Caution -

Input Beyond

Operating Range

Selected

Transducer Calibration Message 4102

If during a transducer zero or span calibration process the transducer output pressure value

measured exceeds plusmn20 of the expected value the following message will appear on the display

Once the Enter button is pressed the display returns to the previous calibration menu

Value entered is

Outside Factory

set limits

(Press Enter)

Operating Range Message 4103

If the new values entered for Temperature Compensation Area Factor or Altitude (see Sections

487 491 and 494) causes the Operating Range Value to exceed the new calculated

Maximum Full Scale Value the following message will appear on the display

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

New Operating Range Message 4104

If a user enters a new Operating Range Value the following message will appear on the display

notifying the user that if any 4 PT Flow Correction Values (see Section 497) were previously

entered they will be reset The message allows the user to confirm that the Operating Range

change should be made To complete the Operating Range change the user must use the

UPDown buttons to change the NO to a YES and press the ENTER button

Value will

Reset 4PT

Flow Correction

Values

Make the Change

(NO)

(Press Enter)

36

411 NETWORK COMMUNICATION

The AAON Airflow Signal Processor can be ordered with BACnet Modbus or LonWorks

Communication For BACnet Communication the AAON Airflow Signal Processors utilize

MSTP (Master SlaveToken Passing) BACnet type protocol BACnet is implemented using

EIA-485 signaling standards through a shielded twisted pair wire operating at a baud rate of 96

Kbps to 768 Kbps Each device has a unique MAC Address ranging from 2 to 127 Refer to

Section 4113 for BACnet Protocol Implementation Conformance Statements (PICS) For

Modbus Communication the AAON Airflow Signal Processors utilize the Modbus ndash RTU Slave

protocol using EIA-485 signaling standards through a shielded twisted pair wire operating at a

baud rate of 96 Kbps to 1152 Kbps Each device has a unique Modbus ID ranging from 1 to

254 Refer to Section 4114 for Modbus software configuration parameters For LonWorks

Communication each AAON Airflow Signal Processor has a unique Neuron Chip ID which is

loaded on the network by pressing a service switch located on the main board (see Section

4111 Figure 7) The LonWorks network utilizes a shielded twisted pair wire operating at a

fixed baud rate of 78 Kbps Refer to Section 4115 for LonWorks network variables

Sections 4111 and 4112 contain procedures for electrical connection of the AAON Airflow

Signal Processor to the network and for configuring the required communication parameters

Electrical Connection 4111

The following procedure outlines the steps for installing the interface wiring for network

communication Network wire should be low capacitance shielded 22 or 24 AWG twisted pair

with PVC jacket such as Belden Part numbers 9841 3105A or equivalent

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Verify that the Power Switch (S3) is in the OFF position and install the interface

wiring for Pins 9 and 10 as shown in Figure 7 If multiple AAON Airflow Signal

Processors will be connected to the same network see Figure 8 for connecting

multiple devices For network systems that require all devices to have a common

signal ground refer to Figure 9 for electrical connection The J2 electrical

connector has a removable terminal block for ease of installing the interface

wiring

Step 4 For proper operation of BACnet and Modbus communication networks the

device that is electrically installed at the end of the network may require the

Terminator Switch be moved to the ON position to prevent line and data

reflection If Terminator is required it must be applied to both physical ends of

the network All other devices should have the Terminator Switch in the OFF

position The communication board is located on the back side of the main

AAON Airflow Signal Processor board See Figure 10 below for Terminator

Switch location on the communication board

Step 5 For LonWorks Communication refer to Figure 7 for the location of the Lon

Service Pin

37

Step 6 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 7 Configure the required parameters as outlined in Section 4112

Step 8 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

RP1

S3

NETWORK

COMMUNICATION+

-

LON

SERVICE PIN

Figure 7 - Network Communication Electrical Connection

38

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

AAON AIRFLOW

SIGNAL PROCESSOR

CONNECT ONLY ONE END OF SHIELD

WIRE TO EARTH GROUND AS SHOWN

SET TERMINATOR SWITCH

ON IF REQUIRED

NETWORK

COMMUNICATIONS

NETWORK

CONNECT SHIELD

WIRES TOGETHER

CONNECT SHIELD

WIRES TOGETHER

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not

Requiring Common Signal Grounds

Note If using two conductor communication wire use the shield wire to connect all device signal grounds together as shown in the figure below If using three conductor communication wire use the 3rd conductor to connect all device signal grounds together and connect one side of the shield to earth ground

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

SIGNAL

GROUND

8

J2

SIGNAL

GROUND

8

J28

J2

USE SHIELD WIRE OR 3RD CONDUCTOR TO

CONNECT DEVICE SIGNAL GROUND TO

NETWORK SIGNAL GROUND

SET TERMINATOR SWITCH

ON IF REQUIRED

AAON AIRFLOW

SIGNAL PROCESSOR

NETWORK

COMMUNICATIONS

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

SIGNAL

GROUND

SIGNAL

GROUND

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds

39

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location

COMMUNICATION BOARD ID

BOARD SERIAL NO

40

Parameter Configuration 4112

If BACnet or Modbus communication is ordered the associated settings will need to be

configured with the exception of Modbus communication with WattMaster Controls which has

been configured at the factory To set the parameters refer to the following procedure below

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 41121

through 41124 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

41121 MAC Address (BACnet Communication Option)

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network Each AAON Airflow Signal

Processor must have a unique MAC Address assigned ranging from 2 to 127

Tech Config

Password 1000

4PT Flow Corr MAC Address

MAC Address (Range = 02 to 254)

Instance Number

Modbus ID (002)

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 6: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

6

12 BASIC OPERATION

The airflow station produces pneumatic output signals referred to as total (high) and static (low)

pressure These two pressures are piped to the airflow signal processor where the static pressure

is subtracted from the total and the result indicated as velocity pressure (differential pressure)

This measured differential pressure is equal to the average velocity of the air stream moving

through the plane that the airflow station is located in This signal can be converted to air

velocity and flow using the following equations

a

aT

460

921293251

a

VPV

71096

AVQ

Where

a Actual density of air in lbft3 (0075 lbft

3 at sea level and 68degF)

aT = Actual temperature in degF (default value is 68degF)

PV = Velocity pressure in inches H2O

V = Velocity in fpm

Q = Flow in cfm

A = Area in ft2

This signal is scaled and linearized before being displayed and transmitted out as a 4-20mA 0-

5VDC or 0-10VDC signal

The AutoZero feature corrects any zero offset caused by large ambient temperature changes

The Temperature Compensation feature compensates the flow signal for density changes caused

by variations in the air temperature

7

2 AIRFLOW STATION

21 SPECIFICATIONS

Material 211

Elements - 6063-T5 anodized aluminum

Casings - 16 ga G90 galvanized steel

Temperature 212

350F continuous operation (in air)

400F intermittent operation (in air)

Humidity 213

0 to 100 non-condensing

Instrument Connections 214

frac14rdquo compression suitable for use with thermoplastic or copper tubing thermoplastic tubing

requires the use of tubing inserts

22 MAINTENANCE

Since the sensing elements have no moving parts only periodic cleaning may be required The

sensing elements should be inspected for fouling of the sensing holes as part of an annual

preventative maintenance program Installations having viscous airborne particles may require

more frequent inspection If the sensing holes on the elements have become fouled or plugged

the following procedure is recommended Although the sensing elements are not fragile by

design care must be taken not to damage or disfigure the cylinder surface when handling

Particular attention must be given to the surface areas in which sensing ports are located

Caution prior to performing the following cleaning procedure the AAON Airflow Signal

Processor must be isolated by disconnect the Total (High) and Static (Low) Pressure

connections on the AAON Airflow Station

- Backpurging Connect cleandry compressed air set at a maximum pressure of 25

psi to the output pressure ports (total andor static) of the sensing element being

cleaned While purging the sensing element wipe the surface of the cylinder with a

cloth or brush to loosen and remove all contaminant buildup

- Cleaning In applications where the sensing elements are subject to viscous

contaminants it is recommended that the surface be washed with a cleaning agent

The cleaning agent used must be suitable for use on aluminum

8

3 TEMPERATURE TRANSMITTER

31 SPECIFICATIONS

Supply Voltage 311

85 to 32VDC

Combined Accuracy (Linearity Hysteresis and Repeatability) 312

plusmn020 of full scale

Temperature Range 313

-30degF to 130degF

Output 314

4-20mA

32 DIMENSIONS

TEMPERATURETRANSMITTER

Model ATT-1

AAON PN V28580

255

370

222

PG1116KNOCKOUT(TYP OF 6)

325

725(STANDARD)

reg

33 ELECTRICAL CONNECTION

All electrical connections from the AAON Temperature Transmitter to the AAON Airflow

Signal Processor have been made at the factory as shown in Figure 1 below Figure 2 shows the

AAON Temperature Transmitter positive and negative connector locations The following

procedure outlines the steps for checking the interface wiring if required

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

9

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor and

the AAON Temperature Transmitter cover by turning each screw counter

clockwise

Step 2 Remove the covers

Step 3 Verify that the Power Switch (S3) on the AAON Airflow Signal Processor is in

the OFF position

Step 4 Confirm the installation of the interface wiring for Pins 4 and 5 on the AAON

Airflow Signal Processor are connected to the positive and negative connectors on

the AAON Temperature Transmitter as shown in Figures 1 and 2 The three

electrical connectors (J1 J2 and optional J3) on the AAON Airflow Signal

Processor have removable terminal blocks for ease of installing the interface

wiring

Step 5 Verify that the Temp Input Switch (S1) on the AAON Airflow Signal Processor is

set to the mA position

Step 6 Turn the Power Switch (S3) on the AAON Airflow Signal Processor to the ON

position see Section 461 and 462 for display descriptions

Step 7 Replace the covers by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

(4-20mA LOOP

POWERED)+

- TRANSMITTER

S1S2 S4

+ 24VDC OUTPUT POWER

- TEMPERATURE INPUT(GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATIONS

- NETWORK COMMUNICATIONS

- PROCESS OUTPUT(GND)

+ PROCESS OUTPUT

8

10

9

4

6

7

5

J2

TEMPERATURE

S1 SET TO

mA POSITION

Figure 1 - Electrical Connections

10

+-

4-2

0m

A C

urre

nt L

oop

BACK SIDE OF COVER

RTD CONNECTION

Figure 2 - Temperature Transmitter Positive amp Negative Connectors

11

4 AIRFLOW SIGNAL PROCESSOR

41 SPECIFICATIONS

Power Supply 411

20 to 28 VACDC

Power Consumption 412

250mA at 24VAC

175mA at 24VDC

Accuracy 413

plusmn025 full scale

Temperature Input 414

4-20mA

Process Output Options 415

0-5VDC

0-10VDC

4-20mA (700Ω maximum load)

HighLow Alarm Relay Outputs 416

Two single (1 form C) dry contacts rated for

5 amps at 30VACDC

10 amps at 120VAC

42 SAFETY

Electrical Connections 421

Before any electrical connections are made ensure the POWER SWITCH is in the OFF

position

Static Electricity 422

The circuit board contains components which are susceptible to damage caused by static

electrical discharge Should it be necessary to remove the circuit board from the enclosure

appropriate precautions must first be taken to ensure that the operator and the circuit board are at

the same electrical potential

12

43 DIMENSIONS

100000ACFM

75 F

J1 J2

TOTALCONNECTION

STATICCONNECTION

462

5785

2265

350

525

Air Fl o wS IGN AL PROCES S OR

AAON

44 ELECTRICAL amp PNEUMATIC CONNECTIONS

All electrical and pneumatic connections to the AAON Airflow Signal Processor have been

made at the factory as shown in Figures 3 through 5 below with the exception of the electrical

connection for the HighLow Alarm Option if ordered and for network communication options

other than with WattMaster Controls The following procedure outlines the steps for turning

ON the AAON Airflow Signal Processor if network communication is required see Section

411 prior to turning ON the AAON Airflow Signal Processor

Caution ndash If electrical connections need to be rewired all electrical connections must be made

with the AAON Airflow Signal Processor Power Switch in the OFF position The three

electrical connectors (J1 J2 and optional J3) have removable terminal blocks for ease of

installing the interface wiring

13

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 4 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

(24VACDC)

POWER SUPPLY

ANALOG RECEIVING DEVICE

PROCESS OUTPUT

S1S2 S4

+

-

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

SWITCH POSITIONS

SHOWN IN BLACK

S1 POSITION

INDICATING 4-20mA

TEMPERATURE INPUT

S2 AND S4 POSITIONS

INDICATING 0-10VDC

PROCESS OUTPUT

RP1

S3

AAON

TEMPERATURE

TRANSMITTER

(4-20mA LOOP POWERED)+

-

Figure 3 - Electrical Connections

14

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROCOUTPUT

mA

V

10V

5V

(24VACDC)

POWER SUPPLY

ANALOG RECEIVING DEVICE

PROCESS OUTPUT

S1S2 S4

+

-

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

SWITCH POSITIONS

SHOWN IN BLACK

S1 POSITION

INDICATING 4-20mA

TEMPERATURE INPUT

S2 AND S4 POSITIONS

INDICATING 0-10VDC

PROCESS OUTPUT

RP1

S3

E-BUS DISTRIBUTION MODULE

+-

AAON

TEMPERATURE

TRANSMITTER

(4-20mA LOOP POWERED)+

-

- COMM

+ COMM

GND

THE SHIELDING WIRE SHOULD BE USED TO

CONNECT WATTMASTER GROUND TO AIRFLOW

SIGNAL PROCESSOR GROUND

Figure 4 - Electrical Connection with Wattmaster Controls

15

J1 J2

TOTAL

CONNECTION

STATIC

CONNECTION

TOTAL PRESSURE CONECTION

AAON AIRFLOW STATION

STATIC PRESSURE CONNECTION

AAON AIRFLOW STATION

Figure 5 - Pneumatic Connections

45 INPUTOUTPUT SET-UP

If input or output configuration changes are required refer to the Tables 1 and 2 in the sections

below and Figure 3 in Section 44

Process Output 451

If controls are provided by AAON the process output has been set by the factory for input to the

specific controller otherwise the default is 0-10VDC To change the output configuration set

the S2 amp S4 switches as follows

Table 1 - Process Output Switch Configuration

Process Output Range S2 S4

Current 4-20mA NA mA

Voltage 0-10VDC 10V V

Voltage 0-5VDC 5V V

Temperature Input 452

Since the AAON Temperature Transmitter has been provided the temperature input has been set

by the factory for 4-20mA To change the input configuration set the S1 switch as follows

Table 2 - Temperature Input Switch

Configuration

Temperature Input S1 Switch Selection

4-20mA mA

0-10VDC V

16

46 ACTIVE DISPLAYS amp KEY FUNCTIONS

Power-up Initiation Display 461

Upon initial power-up Software Revision information will be displayed on the graphic display

for approximately 5 seconds

EQ-1

Software Rev XXXXX

Modbus Rev XXXXX

Process Display Descriptions 462

After power-up initialization the following information will appear on the graphic display

depending upon the options purchased

75˚F

75˚F

75˚F

000000

000000

000000

AutoZero

ACFM

High Alarm

ACFM

Low Alarm

ACFM

Flow Monitoring with an

Auto Zero Cycle

Flow Monitoring with a

High Alarm Condition

Flow Monitoring with a

Low Alarm Condition

Table 3 - Process Display Descriptions

Number Description

1 Process value

2 Air Flow temperature units in degree F or C

3 Flashing Asterisk indicates the CPU is functioning

4 Engineering units

5 Displayed during an AutoZero cycle

6 Indicating High Alarm Value has been exceeded (HighLow Alarm Option)

7 Indicating Low Alarm Value has been exceeded (HighLow Alarm Option)

12 3

4

6

7 5

17

Key Functions 463

The following figure and description identify the function of each Key

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

2

13

4

567

8

RP1 9

Figure 6 - Key Functions

Table 4 - Key Functions

Number Description

1 Enter Key - Allows a user to enter into the Field Menu enter into a selected menu item

or store into memory changes made to the program

2 Up Key - Allows the user to scroll up in the menu list to a selected item or increase digits

when making value changes

3 Right Key - When making changes to user values the Right Key allows the user to scroll

to the correct digit for changes

4 Down Key - Allows the user to scroll down in the menu list to a selected item or

decrease digits when making value changes

5 Left Key - When making changes to user values the Left Key allows the user to scroll to

the correct digit for changes

6

Escape Key - The Escape Key allows the user to back out of the menu to the Active

Display If a user starts to make a change and decides to cancel the change the Escape

Key will allow the user to return to the Active Display without making the change

7 Power Switch ndash Allows a user to turn power off to the AAON Signal Processor during

field wiring or modifications to the device

8 Lon Switch ndash Allows a user to send a unique Neuron device ID when connecting to a

LonWorks communication network

9 RP1 ndash Allows a user to adjust the display contrast

18

47 DISPLAY MENUS

Table 5 shows the Field Setup and Tech Configuration Menus The display will vary depending

upon the options purchased

Table 5 - Display Menus

Field Setup Menu

(Press ENTER Key)

Tech Configuration Menu

(Press UPDOWN Keys simultaneously)

(Enter Password number 1000)

(Press ENTER Key)

Operating Range Area Factor

Zero Calibration Min Calibration

Eng Units Span Calibration

Lockdown Temp Fixed Value

Flow Correction Altitude

AutoZero Output Calibration

Temp Comp Correction Coeff

Display Filter 4PT Flow Corr

Output Filter MAC Address (Optional)

Alarm Options (Optional) Instance Number (Optional)

Factory Defaults Modbus ID (Optional)

Baud Rate (Optional)

48 FIELD SETUP MENUS

To set parameters under the Field Setup Menus refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Field Setup Menu by depressing and holding the Enter Key for 5

seconds

Step 2 Once in the Field Setup Menu use the UpDown Keys to highlight the

required parameter for configuration as shown in Sections 481 through

4811 Press the Enter Key once to access the highlighted parameter

Menu

Step 3 Once in the parameter menu the parameter can be changed using

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Field

Setup Menu

Step 4 After all of the required parameters have been configured exit the Field

Setup Menu by pressing the ESC Key The Process Display (see Section

462) will then be displayed

19

Operating Range 481

The Operating Range allows the user to enter a value which will represent 100 of the process

output signal (5VDC 10VDC or 20mA) The Operating Range Value has been set by the

factory to equal 110 of the design supply flow rate unless this value is less than the Minimum

Full Scale Value allowed for the AAON Airflow Signal Processor The menu will display the

Minimum Full Scale Value allowed which is then entered as the Operating Range

Field Setup

Menu

Operating Range Operating Range

Zero Calibration ( ACFM )

Engineering Units (6000-12000)

Lockdown (010000)

Zero Pressure Calibration 482

The Zero Calibration Menu allows the user to perform a zero transducer calibration to eliminate

any transducer zero shift

(Caution Before performing a zero calibration disconnect the Total (High) and Static (Low)

pressure connections perform a zero calibration and then reconnect the Total and Static

pressure connections)

Field Setup

Menu

Operating Range Input Value CPU Taking

Zero Calibration (0000) Inch wc Samples

Engineering Units

Lockdown (Press Enter) (Please Wait)

Engineering Units 483

Table 6 lists the engineering units that are available for the user to select from for display

purposes Changing the engineering units will affect the process display and the alarm value

menus The default setting is ACFM

Field Setup

Menu

Operating Range Eng Units

Zero Calibration

Engineering Units (ACFM)

Lockdown

20

Table 6 - Engineering Units

Standard

Flow

Units

Actual

Flow

Units

SCFM ACFM

SCFH LS

SLS Am3S

Sm3S Am3M

Sm3M Am3HR

Sm3HR

Lockdown 484

Due to the high square root gain associated with very low delta p values the display and process

output are locked to a zero value until the input value reaches the specified Lockdown Value that

was entered Above the Lockdown Value the output is linear to air flow

4841 Lockdown Value

The Lockdown Value can be changed from 0 to 20 of Operating Range Value Lockdown

Values can be changed in 1 increments The recommended standard is 5

Field Setup

Menu

Operating Range Lockdown (0-20)

Zero Calibration (5)

Engineering Units Delay (0-20 sec)

Lockdown (2) Sec

4842 Lockdown Delay

The Lockdown Delay Menu allows the user to enter a lockdown time delay (0-20 seconds) that

will delay the display and output lockdown from occurring until the flow value or output value

has remained below the lockdown value for that duration

Field Setup

Menu

Operating Range Lockdown (0-20)

Zero Calibration (5)

Engineering Units Delay (0-20 sec)

Lockdown (2) Sec

21

Flow Correction 485

The Flow Correction Menu was incorporated into the AAON Airflow Signal Processor to give

the user an easy way to make corrections to the display and output without changing the

Operating Range Value entered by the factory or user The Flow Correction Menu would be

used to correct for a constant error from zero to the entered Operating Range Value

4851 Flow Correction (K-Factor)

If the user knows the change required to match the balancers reading select the K-Factor

Menu and enter this value for the K-Factor The minimum and maximum allowable K-Factor

Value is displayed in the K-Factor Menu

Field Setup

Menu

Flow Correction Flow Correction

AutoZero K-Factor K-Factor Range

Temp Comp (085 13)

Display Filter K-Factor Calc K=(01000)

4852 Flow Correction (K-Factor Calculator)

If the new K-factor Value needs to be calculated select the K-Factor Calc Menu Enter the

Displayed Value on the AAON Airflow Signal Processor and actual Measured Value press

Enter and the change will be calculated and stored as the new K-Factor Value

Field Setup

Menu

Flow Correction Displayed Value

AutoZero K-Factor (000000)

Temp Comp Measured Value

Display Filter K-Factor Calc (000000)

-FLOW CORRECTION EXAMPLE-

The balancer is consistently measuring a value of 9500 CFM which is 500 CFM less than the

10000 CFM value on the AAON Airflow Signal Processor display The user would then

perform the following math function Measured Value Displayed Value = K-Factor so 9500

CFM 10000 CFM = 0950 The user would enter 0950 for the K-Factor Flow Correction If

the K-Factor Calculator is used the K- Factor Flow Correction would automatically update the K

Factor

AutoZero 486

The AutoZero feature corrects any zero offset caused by large ambient temperature changes

22

4861 AutoZero Status

The AutoZero Status Menu allows the user to turn the AutoZero function ON or OFF

Field Setup

Menu

Flow Correction AZ Status AZ Status

AutoZero AZ Interval (ONOFF)

Temp Comp AZ Test Interval

Display Filter (ON)

4862 AutoZero Interval

The AutoZero Interval Menu allows the user to select the AutoZero Interval from once an hour

to once a day in 1 hour increments Use the UPDOWN keys to select the interval value Upon

device power up an AutoZero cycle will occur after 20 seconds

Field Setup

Menu

Flow Correction AZ Status AZ Interval

AutoZero AZ Interval (1 TO 24HR)

Temp Comp AZ Test Interval

Display Filter (01)HR

4863 AutoZero Test Interval

For troubleshooting or testing the AutoZero function the AutoZero Test Interval Menu allows

the user to select an Auto Zero test frequency of once a minute to once every 30 minutes in 1

minute increments Use the UPDOWN keys to select the interval value If AutoZero Test

Interval is turned ON for more than 60 minutes it will automatically default to OFF and the

AutoZero Interval (see Section 4862) will be reactivated

Field Setup

Menu

Flow Correction AZ Status AZ Test Interval

AutoZero AZ Interval (OFF)

Temp Comp AZ Test Interval Interval

Display Filter (1)Min

Temperature Compensation 487

The Temperature Compensation option compensates the flow and velocity signal for density

changes caused by variations in the process air temperature An input signal from AAON

Temperature Transmitter is required see Section 33 for proper temperature transmitter

connection and Section 452 for temperature input signal configuration

23

4871 Temperature Units

The Temperature Units Menu allows the user to select the appropriate temperature units for the

job The default setting is ordmF

Field Setup

Menu

Flow Correction Temperature Units Units

AutoZero Temperature Values (ordmF ordmC)

Temp Comp Temperature Input

Display Filter Fixed Value (ordmF)

4872 Temperature Values

The Temperature Values Menu allows the factory or user to set the minimum and maximum

temperature range values that represent the input signal from the external temperature transmitter

or the building automation system Since the AAON Temperature Transmitter has been supplied

the minimum and maximum temperature range values of -30degF to 130degF have been

preprogramed

Field Setup

Menu

Flow Correction Temperature Units Minimum Value

AutoZero Temperature Values (-030)

Temp Comp Temperature Input Maximum Value

Display Filter Fixed Value (130)

If the temperature values are changed from the factory settings and the new temperature values

cause the existing Operating Range Value to be outside the new calculated Minimum or

Maximum Full Scale Value the below Warning Message will appear and the Operating Range

will be reset to the new Maximum Full Scale Value by pressing Enter The display will

automatically jump to the Operating Range Menu allowing the user to enter a new Operating

Range Value This can be accomplished by performing the steps under Section 481 See

Temperature Range Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

24

Minimum Value

(-000)

Maximum Value

(000)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Min amp

Max Temperature

value and pressing the

Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Temperature Range Example-

Minimum Value

(-000)

Accepted

(100)

4873 Temperature Input

The Temperature Input Menu allows the user to select between three temperature input options

(Fixed Variable and Network) for the flow calculations Since the AAON Temperature

Transmitter has been supplied Variable has been selected If Fixed is selected the default

temperature value entered in the Fixed Value Menu (see Section 4874) is used If Net is

selected the temperature input signal is obtained through network communications The Net

option is only available if one of the communication options is ordered The temperature value

is only displayed on the LCD screen if the Temperature Input is set to Variable or Network

Field Setup

Menu

Flow Correction Temperature Units Temp Input

AutoZero Temperature Values (FixVarNet)

Temp Comp Temperature Input

Display Filter Fixed Value (Variable)

25

4874 Fixed Value

The Fixed Value Menu allows the user to enter a temperature value for the flow calculations

This value will not be displayed on the LCD screen

Field Setup

Menu

Flow Correction Temperature Units Fixed Value

AutoZero Temperature Values (˚F)

Temp Comp Temperature Input

Display Filter Fixed Value (+068)

Display Filter 488

The Display Filter Menu allows the user to adjust the Display Filter rolling average algorithm by

setting the Sample Interval Time value in seconds and the number of rolling average Sample

Counts The adjustment range of the Sample Interval Time is 010 to 655 seconds in 010

increments The Sample Count range is 0 to 150 Sample Counts The Display Filter is

independent of the Process Output Filter Value (See Section 489)

Field Setup

Menu

Flow Correction Sample Interval Time

AutoZero (005)sec

Temp Comp (0-150) Sample Count

Display Filter (010)

Process Output Filter 489

The Process Output Filter Menu allows the user to adjust the Process Output Filters rolling

average algorithm by setting the Sample Interval Time value in seconds and the number of

rolling average Sample Counts The adjustment range of the Sample Interval Time is 010 to

655 seconds in 010 increments The Sample Count range is 0 to 150 Sample Counts The

Process Output Filter is independent of the Display Filter Value (See Section 488)

Field Setup

Menu

Output Filter Sample Interval Time

Alarm Options (005)sec

Factory Defaults (0-150) Sample Count

(010)

26

HighLow Alarm Option 4810

The following menus for configuration of HighLow Alarms are only available if the HighLow

Alarm option is purchased

48101 Alarm Status

The Alarm Status allows the user to independently turn each alarm ON or OFF

Field Setup

Menu

Output Filter Alarm Status Low Alarm

Alarm Options Alarm Value (On)

Factory Defaults Alarm Delay High Alarm

(On)

48102 Alarm Values

The Alarm Value Menu allows the user to enter the Low or the High flow alarm value Alarm

values will be displayed in the same engineering units selected in the Eng Units Menu (see

Section 483)

- High Alarm Function The High Alarm activates if the flow exceeds the High Alarm

value and resets when the flow drops below the High Alarm Value

- Low Alarm Function The Low Alarm activates if the flow drops below the Low

Alarm Value and resets when the flow exceeds the Low Alarm Value

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Value

Alarm Options Alarm Value (000000)

Factory Defaults Alarm Delay Hi Alarm Value

(100000)

48103 Alarm Delay

The Alarm Delay Menu allows the user to enter an alarm delay of 0 to 999 seconds before an

alarm will be activated The alarm will be reset without a delay

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Delay

Alarm Options Alarm Value (000)Seconds

Factory Defaults Alarm Delay Hi Alarm Delay

(000)Seconds

27

Factory Defaults 4811

If parameter configuration changes have been made incorrectly to the AAON Airflow Signal

Processor all device settings can be restored to the original AAON factory settings by selecting

YES and pressing Enter in both the Set To Factory Defaults Menu and the Verify Set To Factory

Defaults Menu (see Table 7 below for a list of Saved Settings)

Field Setup

Menu

Output Filter Set To Verify Set To

Alarm Options Factory Defaults Factory Defaults

Factory Defaults

(No) (No)

Table 7 - Factory Defaults

Item Saved Setting Item Saved Setting

1 All Factory Calibration Points (12) 14 MAC Address

2 Area Factor 15 Instance Number

3 Operating Range 16 Engineering Units

4 4 Pt Flow Correction 17 Display Filter Values

5 Altitude 18 Output Filter

6 K-Factor 19 DP Display Format

7 Lockdown amp Delay Values 20 Output Calibration

8 Flow Correction 21 AutoZero Status

9 Flow Coefficient 22 AutoZero Interval

10 Min amp Max Temp Range Values 23 Temp Units

11 Alarm Status 24 Temp Input

12 Alarm Values 25 Temp Fixed Value

13 Alarm Delay 26 Baud Rate

28

49 TECH CONFIGURATION MENUS

To set parameters under the Tech Configuration Menu refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 491

through 4911 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

Area Factor 491

To convert the differential pressure signal from the AAON Airflow Station to a flow value the

Area Factor associated with the AAON Airflow Station has been preprogramed by the factory

If the Area Factor needs to be checked or reconfigured the correct Area Factor for the AAON

Airflow Station can be found on the AAON Airflow Station product label installed in the air

handling unit

Tech Config

Password 1000

Area Factor Area Factor

Min Calibration (FT2)

Span Calibration

Altitude (001000)

29

If the Area Factor is reconfigured and the new Area Factor causes the existing Operating Range

Value to be outside the new calculated Minimum or Maximum Full Scale Value the below

Warning Message will appear and the Operating Range will be reset to the new Maximum Full

Scale Value by pressing Enter The display will automatically jump to the Operating Range

Menu allowing the user to enter a new Operating Range Value This can be accomplished by

performing the steps under Section 481 See Area Factor Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Area Factor

(FT )

(001000)

Area Factor

(FT )

Accepted

(001200)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Area

Factor and pressing

the Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Area Factor Example-

2

2

30

Minimum Calibration 492

The Minimum Calibration Menu allows a user to perform a minimum transducer calibration

This value will be placed in a different memory location and used until a Return to Factory

Defaults is selected (see Section 4811)

(Caution Before performing a minimum calibration disconnect the Total (High) and Static

(Low) Pressure connections perform a minimum calibration and then reconnect the Total

and Static Pressure connections)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00000) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Span Calibration 493

The Span Calibration Menu allows the user to perform a span transducer calibration to eliminate

any possible transducer drift This value will be placed in a different memory location than the

Factory Span memory location and used until a Return to Factory Defaults is selected (see

Section 4811)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00570) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Altitude 494

The Altitude Menu allows the user to enter the specific altitude for the job for the density

calculations the job specific site Altitude has been preprogramed by the factory

Tech Config

Password 1000

Area Factor Altitude

Min Calibration

Span Calibration (0000)Ft

Altitude

31

If the Altitude is changed from the factory setting and the new Altitude causes the existing

Operating Range Value to be outside the new calculated Minimum or Maximum Full Scale

Value the below Warning Message will appear and the Operating Range will be reset to the new

Maximum Full Scale Value by pressing Enter The display will automatically jump to the

Operating Range Menu allowing the user to enter a new Operating Range Value This can be

accomplished by performing the steps under Section 481 See Altitude Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Altitude

(0000)Ft

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Altitude

and pressing the Enter

button will calculate

new Min amp Max Op

Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Altitude Example-

Altitude

Accepted

(0100)Ft

32

Process Output Calibration 495

4951 Minimum Calibration

The Minimum Calibration Menu allows the user to make output zero adjustments Monitor the

output and with each Up or Down key depression the output will increase or decrease by

001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

4952 Span Calibration

The Span Calibration Menu allows the user to make output span adjustments Span adjustments

require a low pressure air source adjusted to the Full Scale Value shown on the side label

Monitor the output and with each Up or Down button depression the output will increase or

decrease by 001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

Probe Coefficient 496

The Probe Correction Coefficient Menu allows the user to modify the formula constant of

109670 used for non-amplified Pitot-type flow sensors

Tech Config

Password 1000

Output Calibration Correction Coeff

Correction Coeff Probe

4PT Flow Corr (109670)

MAC Address (00109670)

33

Four Point Flow Correction 497

The Four Point Flow Correction Menu allows the user to make corrections to the display and

output signal at 20 increments between 20 and 80 of the Operating Range Value entered

The Displayed Value is a fixed value determined by the percentage of Operating Range The

Measured Value is the value determined by an independent balancerrsquos reading

Tech Config

Password 1000

Output Calibration 80000 CFM Displayed Value

Correction Coeff 60000 CFM 80000

4PT Flow Corr 40000 CFM Measured Value

MAC Address 20000 CFM 79500

80000 CFM Displayed Value

60000 CFM 60000

40000 CFM Measured Value

20000 CFM 60500

80000 CFM Displayed Value

60000 CFM 40000

40000 CFM Measured Value

20000 CFM 40100

80000 CFM Displayed Value

60000 CFM 20000

40000 CFM Measured Value

20000 CFM 19500

MAC Address (BACnet Communication Option) 498

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network The default is 002 For

additional information refer to Section 411

Tech Config

Password 1000

Output Calibration MAC Address

Correction Coeff (Range = 02 to 254)

4PT Flow Corr

MAC Address (002)

34

Instance Number (BACnet Communication Option) 499

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The default is 1002 For

additional information refer to Section 411

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (Default = 1002)

Instance Number

Modbus ID (01002)

Modbus ID (Modbus Communication Option) 4910

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network The default is 002 For

communication with WattMaster Controls the Modbus ID has been set by the factory to 009 for

outside airflow applications For additional information refer to the Section 411

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

Baud Rate (BACnet amp Modbus Communication Options) 4911

The Baud Rate Menu allows the user to set a unique network baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate Modbus communications supports

96 192 384 576 and 1152 Kbps baud rate The default is 384 Kbps For communication

with WattMaster Controls the Baud Rate has been set by the factory to 96 Kbps For additional

information refer to Section 411

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

35

410 WARNING MESSAGES

Input Pressure Overrange Message 4101

If the input pressure exceeds the entered Operating Range Value the following message will

appear on the display It will alternate between the process display and the error message until

the input falls below the Operating Range Value

- Caution -

Input Beyond

Operating Range

Selected

Transducer Calibration Message 4102

If during a transducer zero or span calibration process the transducer output pressure value

measured exceeds plusmn20 of the expected value the following message will appear on the display

Once the Enter button is pressed the display returns to the previous calibration menu

Value entered is

Outside Factory

set limits

(Press Enter)

Operating Range Message 4103

If the new values entered for Temperature Compensation Area Factor or Altitude (see Sections

487 491 and 494) causes the Operating Range Value to exceed the new calculated

Maximum Full Scale Value the following message will appear on the display

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

New Operating Range Message 4104

If a user enters a new Operating Range Value the following message will appear on the display

notifying the user that if any 4 PT Flow Correction Values (see Section 497) were previously

entered they will be reset The message allows the user to confirm that the Operating Range

change should be made To complete the Operating Range change the user must use the

UPDown buttons to change the NO to a YES and press the ENTER button

Value will

Reset 4PT

Flow Correction

Values

Make the Change

(NO)

(Press Enter)

36

411 NETWORK COMMUNICATION

The AAON Airflow Signal Processor can be ordered with BACnet Modbus or LonWorks

Communication For BACnet Communication the AAON Airflow Signal Processors utilize

MSTP (Master SlaveToken Passing) BACnet type protocol BACnet is implemented using

EIA-485 signaling standards through a shielded twisted pair wire operating at a baud rate of 96

Kbps to 768 Kbps Each device has a unique MAC Address ranging from 2 to 127 Refer to

Section 4113 for BACnet Protocol Implementation Conformance Statements (PICS) For

Modbus Communication the AAON Airflow Signal Processors utilize the Modbus ndash RTU Slave

protocol using EIA-485 signaling standards through a shielded twisted pair wire operating at a

baud rate of 96 Kbps to 1152 Kbps Each device has a unique Modbus ID ranging from 1 to

254 Refer to Section 4114 for Modbus software configuration parameters For LonWorks

Communication each AAON Airflow Signal Processor has a unique Neuron Chip ID which is

loaded on the network by pressing a service switch located on the main board (see Section

4111 Figure 7) The LonWorks network utilizes a shielded twisted pair wire operating at a

fixed baud rate of 78 Kbps Refer to Section 4115 for LonWorks network variables

Sections 4111 and 4112 contain procedures for electrical connection of the AAON Airflow

Signal Processor to the network and for configuring the required communication parameters

Electrical Connection 4111

The following procedure outlines the steps for installing the interface wiring for network

communication Network wire should be low capacitance shielded 22 or 24 AWG twisted pair

with PVC jacket such as Belden Part numbers 9841 3105A or equivalent

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Verify that the Power Switch (S3) is in the OFF position and install the interface

wiring for Pins 9 and 10 as shown in Figure 7 If multiple AAON Airflow Signal

Processors will be connected to the same network see Figure 8 for connecting

multiple devices For network systems that require all devices to have a common

signal ground refer to Figure 9 for electrical connection The J2 electrical

connector has a removable terminal block for ease of installing the interface

wiring

Step 4 For proper operation of BACnet and Modbus communication networks the

device that is electrically installed at the end of the network may require the

Terminator Switch be moved to the ON position to prevent line and data

reflection If Terminator is required it must be applied to both physical ends of

the network All other devices should have the Terminator Switch in the OFF

position The communication board is located on the back side of the main

AAON Airflow Signal Processor board See Figure 10 below for Terminator

Switch location on the communication board

Step 5 For LonWorks Communication refer to Figure 7 for the location of the Lon

Service Pin

37

Step 6 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 7 Configure the required parameters as outlined in Section 4112

Step 8 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

RP1

S3

NETWORK

COMMUNICATION+

-

LON

SERVICE PIN

Figure 7 - Network Communication Electrical Connection

38

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

AAON AIRFLOW

SIGNAL PROCESSOR

CONNECT ONLY ONE END OF SHIELD

WIRE TO EARTH GROUND AS SHOWN

SET TERMINATOR SWITCH

ON IF REQUIRED

NETWORK

COMMUNICATIONS

NETWORK

CONNECT SHIELD

WIRES TOGETHER

CONNECT SHIELD

WIRES TOGETHER

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not

Requiring Common Signal Grounds

Note If using two conductor communication wire use the shield wire to connect all device signal grounds together as shown in the figure below If using three conductor communication wire use the 3rd conductor to connect all device signal grounds together and connect one side of the shield to earth ground

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

SIGNAL

GROUND

8

J2

SIGNAL

GROUND

8

J28

J2

USE SHIELD WIRE OR 3RD CONDUCTOR TO

CONNECT DEVICE SIGNAL GROUND TO

NETWORK SIGNAL GROUND

SET TERMINATOR SWITCH

ON IF REQUIRED

AAON AIRFLOW

SIGNAL PROCESSOR

NETWORK

COMMUNICATIONS

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

SIGNAL

GROUND

SIGNAL

GROUND

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds

39

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location

COMMUNICATION BOARD ID

BOARD SERIAL NO

40

Parameter Configuration 4112

If BACnet or Modbus communication is ordered the associated settings will need to be

configured with the exception of Modbus communication with WattMaster Controls which has

been configured at the factory To set the parameters refer to the following procedure below

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 41121

through 41124 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

41121 MAC Address (BACnet Communication Option)

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network Each AAON Airflow Signal

Processor must have a unique MAC Address assigned ranging from 2 to 127

Tech Config

Password 1000

4PT Flow Corr MAC Address

MAC Address (Range = 02 to 254)

Instance Number

Modbus ID (002)

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 7: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

7

2 AIRFLOW STATION

21 SPECIFICATIONS

Material 211

Elements - 6063-T5 anodized aluminum

Casings - 16 ga G90 galvanized steel

Temperature 212

350F continuous operation (in air)

400F intermittent operation (in air)

Humidity 213

0 to 100 non-condensing

Instrument Connections 214

frac14rdquo compression suitable for use with thermoplastic or copper tubing thermoplastic tubing

requires the use of tubing inserts

22 MAINTENANCE

Since the sensing elements have no moving parts only periodic cleaning may be required The

sensing elements should be inspected for fouling of the sensing holes as part of an annual

preventative maintenance program Installations having viscous airborne particles may require

more frequent inspection If the sensing holes on the elements have become fouled or plugged

the following procedure is recommended Although the sensing elements are not fragile by

design care must be taken not to damage or disfigure the cylinder surface when handling

Particular attention must be given to the surface areas in which sensing ports are located

Caution prior to performing the following cleaning procedure the AAON Airflow Signal

Processor must be isolated by disconnect the Total (High) and Static (Low) Pressure

connections on the AAON Airflow Station

- Backpurging Connect cleandry compressed air set at a maximum pressure of 25

psi to the output pressure ports (total andor static) of the sensing element being

cleaned While purging the sensing element wipe the surface of the cylinder with a

cloth or brush to loosen and remove all contaminant buildup

- Cleaning In applications where the sensing elements are subject to viscous

contaminants it is recommended that the surface be washed with a cleaning agent

The cleaning agent used must be suitable for use on aluminum

8

3 TEMPERATURE TRANSMITTER

31 SPECIFICATIONS

Supply Voltage 311

85 to 32VDC

Combined Accuracy (Linearity Hysteresis and Repeatability) 312

plusmn020 of full scale

Temperature Range 313

-30degF to 130degF

Output 314

4-20mA

32 DIMENSIONS

TEMPERATURETRANSMITTER

Model ATT-1

AAON PN V28580

255

370

222

PG1116KNOCKOUT(TYP OF 6)

325

725(STANDARD)

reg

33 ELECTRICAL CONNECTION

All electrical connections from the AAON Temperature Transmitter to the AAON Airflow

Signal Processor have been made at the factory as shown in Figure 1 below Figure 2 shows the

AAON Temperature Transmitter positive and negative connector locations The following

procedure outlines the steps for checking the interface wiring if required

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

9

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor and

the AAON Temperature Transmitter cover by turning each screw counter

clockwise

Step 2 Remove the covers

Step 3 Verify that the Power Switch (S3) on the AAON Airflow Signal Processor is in

the OFF position

Step 4 Confirm the installation of the interface wiring for Pins 4 and 5 on the AAON

Airflow Signal Processor are connected to the positive and negative connectors on

the AAON Temperature Transmitter as shown in Figures 1 and 2 The three

electrical connectors (J1 J2 and optional J3) on the AAON Airflow Signal

Processor have removable terminal blocks for ease of installing the interface

wiring

Step 5 Verify that the Temp Input Switch (S1) on the AAON Airflow Signal Processor is

set to the mA position

Step 6 Turn the Power Switch (S3) on the AAON Airflow Signal Processor to the ON

position see Section 461 and 462 for display descriptions

Step 7 Replace the covers by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

(4-20mA LOOP

POWERED)+

- TRANSMITTER

S1S2 S4

+ 24VDC OUTPUT POWER

- TEMPERATURE INPUT(GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATIONS

- NETWORK COMMUNICATIONS

- PROCESS OUTPUT(GND)

+ PROCESS OUTPUT

8

10

9

4

6

7

5

J2

TEMPERATURE

S1 SET TO

mA POSITION

Figure 1 - Electrical Connections

10

+-

4-2

0m

A C

urre

nt L

oop

BACK SIDE OF COVER

RTD CONNECTION

Figure 2 - Temperature Transmitter Positive amp Negative Connectors

11

4 AIRFLOW SIGNAL PROCESSOR

41 SPECIFICATIONS

Power Supply 411

20 to 28 VACDC

Power Consumption 412

250mA at 24VAC

175mA at 24VDC

Accuracy 413

plusmn025 full scale

Temperature Input 414

4-20mA

Process Output Options 415

0-5VDC

0-10VDC

4-20mA (700Ω maximum load)

HighLow Alarm Relay Outputs 416

Two single (1 form C) dry contacts rated for

5 amps at 30VACDC

10 amps at 120VAC

42 SAFETY

Electrical Connections 421

Before any electrical connections are made ensure the POWER SWITCH is in the OFF

position

Static Electricity 422

The circuit board contains components which are susceptible to damage caused by static

electrical discharge Should it be necessary to remove the circuit board from the enclosure

appropriate precautions must first be taken to ensure that the operator and the circuit board are at

the same electrical potential

12

43 DIMENSIONS

100000ACFM

75 F

J1 J2

TOTALCONNECTION

STATICCONNECTION

462

5785

2265

350

525

Air Fl o wS IGN AL PROCES S OR

AAON

44 ELECTRICAL amp PNEUMATIC CONNECTIONS

All electrical and pneumatic connections to the AAON Airflow Signal Processor have been

made at the factory as shown in Figures 3 through 5 below with the exception of the electrical

connection for the HighLow Alarm Option if ordered and for network communication options

other than with WattMaster Controls The following procedure outlines the steps for turning

ON the AAON Airflow Signal Processor if network communication is required see Section

411 prior to turning ON the AAON Airflow Signal Processor

Caution ndash If electrical connections need to be rewired all electrical connections must be made

with the AAON Airflow Signal Processor Power Switch in the OFF position The three

electrical connectors (J1 J2 and optional J3) have removable terminal blocks for ease of

installing the interface wiring

13

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 4 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

(24VACDC)

POWER SUPPLY

ANALOG RECEIVING DEVICE

PROCESS OUTPUT

S1S2 S4

+

-

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

SWITCH POSITIONS

SHOWN IN BLACK

S1 POSITION

INDICATING 4-20mA

TEMPERATURE INPUT

S2 AND S4 POSITIONS

INDICATING 0-10VDC

PROCESS OUTPUT

RP1

S3

AAON

TEMPERATURE

TRANSMITTER

(4-20mA LOOP POWERED)+

-

Figure 3 - Electrical Connections

14

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROCOUTPUT

mA

V

10V

5V

(24VACDC)

POWER SUPPLY

ANALOG RECEIVING DEVICE

PROCESS OUTPUT

S1S2 S4

+

-

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

SWITCH POSITIONS

SHOWN IN BLACK

S1 POSITION

INDICATING 4-20mA

TEMPERATURE INPUT

S2 AND S4 POSITIONS

INDICATING 0-10VDC

PROCESS OUTPUT

RP1

S3

E-BUS DISTRIBUTION MODULE

+-

AAON

TEMPERATURE

TRANSMITTER

(4-20mA LOOP POWERED)+

-

- COMM

+ COMM

GND

THE SHIELDING WIRE SHOULD BE USED TO

CONNECT WATTMASTER GROUND TO AIRFLOW

SIGNAL PROCESSOR GROUND

Figure 4 - Electrical Connection with Wattmaster Controls

15

J1 J2

TOTAL

CONNECTION

STATIC

CONNECTION

TOTAL PRESSURE CONECTION

AAON AIRFLOW STATION

STATIC PRESSURE CONNECTION

AAON AIRFLOW STATION

Figure 5 - Pneumatic Connections

45 INPUTOUTPUT SET-UP

If input or output configuration changes are required refer to the Tables 1 and 2 in the sections

below and Figure 3 in Section 44

Process Output 451

If controls are provided by AAON the process output has been set by the factory for input to the

specific controller otherwise the default is 0-10VDC To change the output configuration set

the S2 amp S4 switches as follows

Table 1 - Process Output Switch Configuration

Process Output Range S2 S4

Current 4-20mA NA mA

Voltage 0-10VDC 10V V

Voltage 0-5VDC 5V V

Temperature Input 452

Since the AAON Temperature Transmitter has been provided the temperature input has been set

by the factory for 4-20mA To change the input configuration set the S1 switch as follows

Table 2 - Temperature Input Switch

Configuration

Temperature Input S1 Switch Selection

4-20mA mA

0-10VDC V

16

46 ACTIVE DISPLAYS amp KEY FUNCTIONS

Power-up Initiation Display 461

Upon initial power-up Software Revision information will be displayed on the graphic display

for approximately 5 seconds

EQ-1

Software Rev XXXXX

Modbus Rev XXXXX

Process Display Descriptions 462

After power-up initialization the following information will appear on the graphic display

depending upon the options purchased

75˚F

75˚F

75˚F

000000

000000

000000

AutoZero

ACFM

High Alarm

ACFM

Low Alarm

ACFM

Flow Monitoring with an

Auto Zero Cycle

Flow Monitoring with a

High Alarm Condition

Flow Monitoring with a

Low Alarm Condition

Table 3 - Process Display Descriptions

Number Description

1 Process value

2 Air Flow temperature units in degree F or C

3 Flashing Asterisk indicates the CPU is functioning

4 Engineering units

5 Displayed during an AutoZero cycle

6 Indicating High Alarm Value has been exceeded (HighLow Alarm Option)

7 Indicating Low Alarm Value has been exceeded (HighLow Alarm Option)

12 3

4

6

7 5

17

Key Functions 463

The following figure and description identify the function of each Key

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

2

13

4

567

8

RP1 9

Figure 6 - Key Functions

Table 4 - Key Functions

Number Description

1 Enter Key - Allows a user to enter into the Field Menu enter into a selected menu item

or store into memory changes made to the program

2 Up Key - Allows the user to scroll up in the menu list to a selected item or increase digits

when making value changes

3 Right Key - When making changes to user values the Right Key allows the user to scroll

to the correct digit for changes

4 Down Key - Allows the user to scroll down in the menu list to a selected item or

decrease digits when making value changes

5 Left Key - When making changes to user values the Left Key allows the user to scroll to

the correct digit for changes

6

Escape Key - The Escape Key allows the user to back out of the menu to the Active

Display If a user starts to make a change and decides to cancel the change the Escape

Key will allow the user to return to the Active Display without making the change

7 Power Switch ndash Allows a user to turn power off to the AAON Signal Processor during

field wiring or modifications to the device

8 Lon Switch ndash Allows a user to send a unique Neuron device ID when connecting to a

LonWorks communication network

9 RP1 ndash Allows a user to adjust the display contrast

18

47 DISPLAY MENUS

Table 5 shows the Field Setup and Tech Configuration Menus The display will vary depending

upon the options purchased

Table 5 - Display Menus

Field Setup Menu

(Press ENTER Key)

Tech Configuration Menu

(Press UPDOWN Keys simultaneously)

(Enter Password number 1000)

(Press ENTER Key)

Operating Range Area Factor

Zero Calibration Min Calibration

Eng Units Span Calibration

Lockdown Temp Fixed Value

Flow Correction Altitude

AutoZero Output Calibration

Temp Comp Correction Coeff

Display Filter 4PT Flow Corr

Output Filter MAC Address (Optional)

Alarm Options (Optional) Instance Number (Optional)

Factory Defaults Modbus ID (Optional)

Baud Rate (Optional)

48 FIELD SETUP MENUS

To set parameters under the Field Setup Menus refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Field Setup Menu by depressing and holding the Enter Key for 5

seconds

Step 2 Once in the Field Setup Menu use the UpDown Keys to highlight the

required parameter for configuration as shown in Sections 481 through

4811 Press the Enter Key once to access the highlighted parameter

Menu

Step 3 Once in the parameter menu the parameter can be changed using

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Field

Setup Menu

Step 4 After all of the required parameters have been configured exit the Field

Setup Menu by pressing the ESC Key The Process Display (see Section

462) will then be displayed

19

Operating Range 481

The Operating Range allows the user to enter a value which will represent 100 of the process

output signal (5VDC 10VDC or 20mA) The Operating Range Value has been set by the

factory to equal 110 of the design supply flow rate unless this value is less than the Minimum

Full Scale Value allowed for the AAON Airflow Signal Processor The menu will display the

Minimum Full Scale Value allowed which is then entered as the Operating Range

Field Setup

Menu

Operating Range Operating Range

Zero Calibration ( ACFM )

Engineering Units (6000-12000)

Lockdown (010000)

Zero Pressure Calibration 482

The Zero Calibration Menu allows the user to perform a zero transducer calibration to eliminate

any transducer zero shift

(Caution Before performing a zero calibration disconnect the Total (High) and Static (Low)

pressure connections perform a zero calibration and then reconnect the Total and Static

pressure connections)

Field Setup

Menu

Operating Range Input Value CPU Taking

Zero Calibration (0000) Inch wc Samples

Engineering Units

Lockdown (Press Enter) (Please Wait)

Engineering Units 483

Table 6 lists the engineering units that are available for the user to select from for display

purposes Changing the engineering units will affect the process display and the alarm value

menus The default setting is ACFM

Field Setup

Menu

Operating Range Eng Units

Zero Calibration

Engineering Units (ACFM)

Lockdown

20

Table 6 - Engineering Units

Standard

Flow

Units

Actual

Flow

Units

SCFM ACFM

SCFH LS

SLS Am3S

Sm3S Am3M

Sm3M Am3HR

Sm3HR

Lockdown 484

Due to the high square root gain associated with very low delta p values the display and process

output are locked to a zero value until the input value reaches the specified Lockdown Value that

was entered Above the Lockdown Value the output is linear to air flow

4841 Lockdown Value

The Lockdown Value can be changed from 0 to 20 of Operating Range Value Lockdown

Values can be changed in 1 increments The recommended standard is 5

Field Setup

Menu

Operating Range Lockdown (0-20)

Zero Calibration (5)

Engineering Units Delay (0-20 sec)

Lockdown (2) Sec

4842 Lockdown Delay

The Lockdown Delay Menu allows the user to enter a lockdown time delay (0-20 seconds) that

will delay the display and output lockdown from occurring until the flow value or output value

has remained below the lockdown value for that duration

Field Setup

Menu

Operating Range Lockdown (0-20)

Zero Calibration (5)

Engineering Units Delay (0-20 sec)

Lockdown (2) Sec

21

Flow Correction 485

The Flow Correction Menu was incorporated into the AAON Airflow Signal Processor to give

the user an easy way to make corrections to the display and output without changing the

Operating Range Value entered by the factory or user The Flow Correction Menu would be

used to correct for a constant error from zero to the entered Operating Range Value

4851 Flow Correction (K-Factor)

If the user knows the change required to match the balancers reading select the K-Factor

Menu and enter this value for the K-Factor The minimum and maximum allowable K-Factor

Value is displayed in the K-Factor Menu

Field Setup

Menu

Flow Correction Flow Correction

AutoZero K-Factor K-Factor Range

Temp Comp (085 13)

Display Filter K-Factor Calc K=(01000)

4852 Flow Correction (K-Factor Calculator)

If the new K-factor Value needs to be calculated select the K-Factor Calc Menu Enter the

Displayed Value on the AAON Airflow Signal Processor and actual Measured Value press

Enter and the change will be calculated and stored as the new K-Factor Value

Field Setup

Menu

Flow Correction Displayed Value

AutoZero K-Factor (000000)

Temp Comp Measured Value

Display Filter K-Factor Calc (000000)

-FLOW CORRECTION EXAMPLE-

The balancer is consistently measuring a value of 9500 CFM which is 500 CFM less than the

10000 CFM value on the AAON Airflow Signal Processor display The user would then

perform the following math function Measured Value Displayed Value = K-Factor so 9500

CFM 10000 CFM = 0950 The user would enter 0950 for the K-Factor Flow Correction If

the K-Factor Calculator is used the K- Factor Flow Correction would automatically update the K

Factor

AutoZero 486

The AutoZero feature corrects any zero offset caused by large ambient temperature changes

22

4861 AutoZero Status

The AutoZero Status Menu allows the user to turn the AutoZero function ON or OFF

Field Setup

Menu

Flow Correction AZ Status AZ Status

AutoZero AZ Interval (ONOFF)

Temp Comp AZ Test Interval

Display Filter (ON)

4862 AutoZero Interval

The AutoZero Interval Menu allows the user to select the AutoZero Interval from once an hour

to once a day in 1 hour increments Use the UPDOWN keys to select the interval value Upon

device power up an AutoZero cycle will occur after 20 seconds

Field Setup

Menu

Flow Correction AZ Status AZ Interval

AutoZero AZ Interval (1 TO 24HR)

Temp Comp AZ Test Interval

Display Filter (01)HR

4863 AutoZero Test Interval

For troubleshooting or testing the AutoZero function the AutoZero Test Interval Menu allows

the user to select an Auto Zero test frequency of once a minute to once every 30 minutes in 1

minute increments Use the UPDOWN keys to select the interval value If AutoZero Test

Interval is turned ON for more than 60 minutes it will automatically default to OFF and the

AutoZero Interval (see Section 4862) will be reactivated

Field Setup

Menu

Flow Correction AZ Status AZ Test Interval

AutoZero AZ Interval (OFF)

Temp Comp AZ Test Interval Interval

Display Filter (1)Min

Temperature Compensation 487

The Temperature Compensation option compensates the flow and velocity signal for density

changes caused by variations in the process air temperature An input signal from AAON

Temperature Transmitter is required see Section 33 for proper temperature transmitter

connection and Section 452 for temperature input signal configuration

23

4871 Temperature Units

The Temperature Units Menu allows the user to select the appropriate temperature units for the

job The default setting is ordmF

Field Setup

Menu

Flow Correction Temperature Units Units

AutoZero Temperature Values (ordmF ordmC)

Temp Comp Temperature Input

Display Filter Fixed Value (ordmF)

4872 Temperature Values

The Temperature Values Menu allows the factory or user to set the minimum and maximum

temperature range values that represent the input signal from the external temperature transmitter

or the building automation system Since the AAON Temperature Transmitter has been supplied

the minimum and maximum temperature range values of -30degF to 130degF have been

preprogramed

Field Setup

Menu

Flow Correction Temperature Units Minimum Value

AutoZero Temperature Values (-030)

Temp Comp Temperature Input Maximum Value

Display Filter Fixed Value (130)

If the temperature values are changed from the factory settings and the new temperature values

cause the existing Operating Range Value to be outside the new calculated Minimum or

Maximum Full Scale Value the below Warning Message will appear and the Operating Range

will be reset to the new Maximum Full Scale Value by pressing Enter The display will

automatically jump to the Operating Range Menu allowing the user to enter a new Operating

Range Value This can be accomplished by performing the steps under Section 481 See

Temperature Range Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

24

Minimum Value

(-000)

Maximum Value

(000)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Min amp

Max Temperature

value and pressing the

Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Temperature Range Example-

Minimum Value

(-000)

Accepted

(100)

4873 Temperature Input

The Temperature Input Menu allows the user to select between three temperature input options

(Fixed Variable and Network) for the flow calculations Since the AAON Temperature

Transmitter has been supplied Variable has been selected If Fixed is selected the default

temperature value entered in the Fixed Value Menu (see Section 4874) is used If Net is

selected the temperature input signal is obtained through network communications The Net

option is only available if one of the communication options is ordered The temperature value

is only displayed on the LCD screen if the Temperature Input is set to Variable or Network

Field Setup

Menu

Flow Correction Temperature Units Temp Input

AutoZero Temperature Values (FixVarNet)

Temp Comp Temperature Input

Display Filter Fixed Value (Variable)

25

4874 Fixed Value

The Fixed Value Menu allows the user to enter a temperature value for the flow calculations

This value will not be displayed on the LCD screen

Field Setup

Menu

Flow Correction Temperature Units Fixed Value

AutoZero Temperature Values (˚F)

Temp Comp Temperature Input

Display Filter Fixed Value (+068)

Display Filter 488

The Display Filter Menu allows the user to adjust the Display Filter rolling average algorithm by

setting the Sample Interval Time value in seconds and the number of rolling average Sample

Counts The adjustment range of the Sample Interval Time is 010 to 655 seconds in 010

increments The Sample Count range is 0 to 150 Sample Counts The Display Filter is

independent of the Process Output Filter Value (See Section 489)

Field Setup

Menu

Flow Correction Sample Interval Time

AutoZero (005)sec

Temp Comp (0-150) Sample Count

Display Filter (010)

Process Output Filter 489

The Process Output Filter Menu allows the user to adjust the Process Output Filters rolling

average algorithm by setting the Sample Interval Time value in seconds and the number of

rolling average Sample Counts The adjustment range of the Sample Interval Time is 010 to

655 seconds in 010 increments The Sample Count range is 0 to 150 Sample Counts The

Process Output Filter is independent of the Display Filter Value (See Section 488)

Field Setup

Menu

Output Filter Sample Interval Time

Alarm Options (005)sec

Factory Defaults (0-150) Sample Count

(010)

26

HighLow Alarm Option 4810

The following menus for configuration of HighLow Alarms are only available if the HighLow

Alarm option is purchased

48101 Alarm Status

The Alarm Status allows the user to independently turn each alarm ON or OFF

Field Setup

Menu

Output Filter Alarm Status Low Alarm

Alarm Options Alarm Value (On)

Factory Defaults Alarm Delay High Alarm

(On)

48102 Alarm Values

The Alarm Value Menu allows the user to enter the Low or the High flow alarm value Alarm

values will be displayed in the same engineering units selected in the Eng Units Menu (see

Section 483)

- High Alarm Function The High Alarm activates if the flow exceeds the High Alarm

value and resets when the flow drops below the High Alarm Value

- Low Alarm Function The Low Alarm activates if the flow drops below the Low

Alarm Value and resets when the flow exceeds the Low Alarm Value

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Value

Alarm Options Alarm Value (000000)

Factory Defaults Alarm Delay Hi Alarm Value

(100000)

48103 Alarm Delay

The Alarm Delay Menu allows the user to enter an alarm delay of 0 to 999 seconds before an

alarm will be activated The alarm will be reset without a delay

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Delay

Alarm Options Alarm Value (000)Seconds

Factory Defaults Alarm Delay Hi Alarm Delay

(000)Seconds

27

Factory Defaults 4811

If parameter configuration changes have been made incorrectly to the AAON Airflow Signal

Processor all device settings can be restored to the original AAON factory settings by selecting

YES and pressing Enter in both the Set To Factory Defaults Menu and the Verify Set To Factory

Defaults Menu (see Table 7 below for a list of Saved Settings)

Field Setup

Menu

Output Filter Set To Verify Set To

Alarm Options Factory Defaults Factory Defaults

Factory Defaults

(No) (No)

Table 7 - Factory Defaults

Item Saved Setting Item Saved Setting

1 All Factory Calibration Points (12) 14 MAC Address

2 Area Factor 15 Instance Number

3 Operating Range 16 Engineering Units

4 4 Pt Flow Correction 17 Display Filter Values

5 Altitude 18 Output Filter

6 K-Factor 19 DP Display Format

7 Lockdown amp Delay Values 20 Output Calibration

8 Flow Correction 21 AutoZero Status

9 Flow Coefficient 22 AutoZero Interval

10 Min amp Max Temp Range Values 23 Temp Units

11 Alarm Status 24 Temp Input

12 Alarm Values 25 Temp Fixed Value

13 Alarm Delay 26 Baud Rate

28

49 TECH CONFIGURATION MENUS

To set parameters under the Tech Configuration Menu refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 491

through 4911 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

Area Factor 491

To convert the differential pressure signal from the AAON Airflow Station to a flow value the

Area Factor associated with the AAON Airflow Station has been preprogramed by the factory

If the Area Factor needs to be checked or reconfigured the correct Area Factor for the AAON

Airflow Station can be found on the AAON Airflow Station product label installed in the air

handling unit

Tech Config

Password 1000

Area Factor Area Factor

Min Calibration (FT2)

Span Calibration

Altitude (001000)

29

If the Area Factor is reconfigured and the new Area Factor causes the existing Operating Range

Value to be outside the new calculated Minimum or Maximum Full Scale Value the below

Warning Message will appear and the Operating Range will be reset to the new Maximum Full

Scale Value by pressing Enter The display will automatically jump to the Operating Range

Menu allowing the user to enter a new Operating Range Value This can be accomplished by

performing the steps under Section 481 See Area Factor Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Area Factor

(FT )

(001000)

Area Factor

(FT )

Accepted

(001200)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Area

Factor and pressing

the Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Area Factor Example-

2

2

30

Minimum Calibration 492

The Minimum Calibration Menu allows a user to perform a minimum transducer calibration

This value will be placed in a different memory location and used until a Return to Factory

Defaults is selected (see Section 4811)

(Caution Before performing a minimum calibration disconnect the Total (High) and Static

(Low) Pressure connections perform a minimum calibration and then reconnect the Total

and Static Pressure connections)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00000) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Span Calibration 493

The Span Calibration Menu allows the user to perform a span transducer calibration to eliminate

any possible transducer drift This value will be placed in a different memory location than the

Factory Span memory location and used until a Return to Factory Defaults is selected (see

Section 4811)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00570) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Altitude 494

The Altitude Menu allows the user to enter the specific altitude for the job for the density

calculations the job specific site Altitude has been preprogramed by the factory

Tech Config

Password 1000

Area Factor Altitude

Min Calibration

Span Calibration (0000)Ft

Altitude

31

If the Altitude is changed from the factory setting and the new Altitude causes the existing

Operating Range Value to be outside the new calculated Minimum or Maximum Full Scale

Value the below Warning Message will appear and the Operating Range will be reset to the new

Maximum Full Scale Value by pressing Enter The display will automatically jump to the

Operating Range Menu allowing the user to enter a new Operating Range Value This can be

accomplished by performing the steps under Section 481 See Altitude Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Altitude

(0000)Ft

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Altitude

and pressing the Enter

button will calculate

new Min amp Max Op

Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Altitude Example-

Altitude

Accepted

(0100)Ft

32

Process Output Calibration 495

4951 Minimum Calibration

The Minimum Calibration Menu allows the user to make output zero adjustments Monitor the

output and with each Up or Down key depression the output will increase or decrease by

001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

4952 Span Calibration

The Span Calibration Menu allows the user to make output span adjustments Span adjustments

require a low pressure air source adjusted to the Full Scale Value shown on the side label

Monitor the output and with each Up or Down button depression the output will increase or

decrease by 001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

Probe Coefficient 496

The Probe Correction Coefficient Menu allows the user to modify the formula constant of

109670 used for non-amplified Pitot-type flow sensors

Tech Config

Password 1000

Output Calibration Correction Coeff

Correction Coeff Probe

4PT Flow Corr (109670)

MAC Address (00109670)

33

Four Point Flow Correction 497

The Four Point Flow Correction Menu allows the user to make corrections to the display and

output signal at 20 increments between 20 and 80 of the Operating Range Value entered

The Displayed Value is a fixed value determined by the percentage of Operating Range The

Measured Value is the value determined by an independent balancerrsquos reading

Tech Config

Password 1000

Output Calibration 80000 CFM Displayed Value

Correction Coeff 60000 CFM 80000

4PT Flow Corr 40000 CFM Measured Value

MAC Address 20000 CFM 79500

80000 CFM Displayed Value

60000 CFM 60000

40000 CFM Measured Value

20000 CFM 60500

80000 CFM Displayed Value

60000 CFM 40000

40000 CFM Measured Value

20000 CFM 40100

80000 CFM Displayed Value

60000 CFM 20000

40000 CFM Measured Value

20000 CFM 19500

MAC Address (BACnet Communication Option) 498

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network The default is 002 For

additional information refer to Section 411

Tech Config

Password 1000

Output Calibration MAC Address

Correction Coeff (Range = 02 to 254)

4PT Flow Corr

MAC Address (002)

34

Instance Number (BACnet Communication Option) 499

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The default is 1002 For

additional information refer to Section 411

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (Default = 1002)

Instance Number

Modbus ID (01002)

Modbus ID (Modbus Communication Option) 4910

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network The default is 002 For

communication with WattMaster Controls the Modbus ID has been set by the factory to 009 for

outside airflow applications For additional information refer to the Section 411

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

Baud Rate (BACnet amp Modbus Communication Options) 4911

The Baud Rate Menu allows the user to set a unique network baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate Modbus communications supports

96 192 384 576 and 1152 Kbps baud rate The default is 384 Kbps For communication

with WattMaster Controls the Baud Rate has been set by the factory to 96 Kbps For additional

information refer to Section 411

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

35

410 WARNING MESSAGES

Input Pressure Overrange Message 4101

If the input pressure exceeds the entered Operating Range Value the following message will

appear on the display It will alternate between the process display and the error message until

the input falls below the Operating Range Value

- Caution -

Input Beyond

Operating Range

Selected

Transducer Calibration Message 4102

If during a transducer zero or span calibration process the transducer output pressure value

measured exceeds plusmn20 of the expected value the following message will appear on the display

Once the Enter button is pressed the display returns to the previous calibration menu

Value entered is

Outside Factory

set limits

(Press Enter)

Operating Range Message 4103

If the new values entered for Temperature Compensation Area Factor or Altitude (see Sections

487 491 and 494) causes the Operating Range Value to exceed the new calculated

Maximum Full Scale Value the following message will appear on the display

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

New Operating Range Message 4104

If a user enters a new Operating Range Value the following message will appear on the display

notifying the user that if any 4 PT Flow Correction Values (see Section 497) were previously

entered they will be reset The message allows the user to confirm that the Operating Range

change should be made To complete the Operating Range change the user must use the

UPDown buttons to change the NO to a YES and press the ENTER button

Value will

Reset 4PT

Flow Correction

Values

Make the Change

(NO)

(Press Enter)

36

411 NETWORK COMMUNICATION

The AAON Airflow Signal Processor can be ordered with BACnet Modbus or LonWorks

Communication For BACnet Communication the AAON Airflow Signal Processors utilize

MSTP (Master SlaveToken Passing) BACnet type protocol BACnet is implemented using

EIA-485 signaling standards through a shielded twisted pair wire operating at a baud rate of 96

Kbps to 768 Kbps Each device has a unique MAC Address ranging from 2 to 127 Refer to

Section 4113 for BACnet Protocol Implementation Conformance Statements (PICS) For

Modbus Communication the AAON Airflow Signal Processors utilize the Modbus ndash RTU Slave

protocol using EIA-485 signaling standards through a shielded twisted pair wire operating at a

baud rate of 96 Kbps to 1152 Kbps Each device has a unique Modbus ID ranging from 1 to

254 Refer to Section 4114 for Modbus software configuration parameters For LonWorks

Communication each AAON Airflow Signal Processor has a unique Neuron Chip ID which is

loaded on the network by pressing a service switch located on the main board (see Section

4111 Figure 7) The LonWorks network utilizes a shielded twisted pair wire operating at a

fixed baud rate of 78 Kbps Refer to Section 4115 for LonWorks network variables

Sections 4111 and 4112 contain procedures for electrical connection of the AAON Airflow

Signal Processor to the network and for configuring the required communication parameters

Electrical Connection 4111

The following procedure outlines the steps for installing the interface wiring for network

communication Network wire should be low capacitance shielded 22 or 24 AWG twisted pair

with PVC jacket such as Belden Part numbers 9841 3105A or equivalent

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Verify that the Power Switch (S3) is in the OFF position and install the interface

wiring for Pins 9 and 10 as shown in Figure 7 If multiple AAON Airflow Signal

Processors will be connected to the same network see Figure 8 for connecting

multiple devices For network systems that require all devices to have a common

signal ground refer to Figure 9 for electrical connection The J2 electrical

connector has a removable terminal block for ease of installing the interface

wiring

Step 4 For proper operation of BACnet and Modbus communication networks the

device that is electrically installed at the end of the network may require the

Terminator Switch be moved to the ON position to prevent line and data

reflection If Terminator is required it must be applied to both physical ends of

the network All other devices should have the Terminator Switch in the OFF

position The communication board is located on the back side of the main

AAON Airflow Signal Processor board See Figure 10 below for Terminator

Switch location on the communication board

Step 5 For LonWorks Communication refer to Figure 7 for the location of the Lon

Service Pin

37

Step 6 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 7 Configure the required parameters as outlined in Section 4112

Step 8 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

RP1

S3

NETWORK

COMMUNICATION+

-

LON

SERVICE PIN

Figure 7 - Network Communication Electrical Connection

38

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

AAON AIRFLOW

SIGNAL PROCESSOR

CONNECT ONLY ONE END OF SHIELD

WIRE TO EARTH GROUND AS SHOWN

SET TERMINATOR SWITCH

ON IF REQUIRED

NETWORK

COMMUNICATIONS

NETWORK

CONNECT SHIELD

WIRES TOGETHER

CONNECT SHIELD

WIRES TOGETHER

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not

Requiring Common Signal Grounds

Note If using two conductor communication wire use the shield wire to connect all device signal grounds together as shown in the figure below If using three conductor communication wire use the 3rd conductor to connect all device signal grounds together and connect one side of the shield to earth ground

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

SIGNAL

GROUND

8

J2

SIGNAL

GROUND

8

J28

J2

USE SHIELD WIRE OR 3RD CONDUCTOR TO

CONNECT DEVICE SIGNAL GROUND TO

NETWORK SIGNAL GROUND

SET TERMINATOR SWITCH

ON IF REQUIRED

AAON AIRFLOW

SIGNAL PROCESSOR

NETWORK

COMMUNICATIONS

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

SIGNAL

GROUND

SIGNAL

GROUND

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds

39

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location

COMMUNICATION BOARD ID

BOARD SERIAL NO

40

Parameter Configuration 4112

If BACnet or Modbus communication is ordered the associated settings will need to be

configured with the exception of Modbus communication with WattMaster Controls which has

been configured at the factory To set the parameters refer to the following procedure below

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 41121

through 41124 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

41121 MAC Address (BACnet Communication Option)

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network Each AAON Airflow Signal

Processor must have a unique MAC Address assigned ranging from 2 to 127

Tech Config

Password 1000

4PT Flow Corr MAC Address

MAC Address (Range = 02 to 254)

Instance Number

Modbus ID (002)

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 8: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

8

3 TEMPERATURE TRANSMITTER

31 SPECIFICATIONS

Supply Voltage 311

85 to 32VDC

Combined Accuracy (Linearity Hysteresis and Repeatability) 312

plusmn020 of full scale

Temperature Range 313

-30degF to 130degF

Output 314

4-20mA

32 DIMENSIONS

TEMPERATURETRANSMITTER

Model ATT-1

AAON PN V28580

255

370

222

PG1116KNOCKOUT(TYP OF 6)

325

725(STANDARD)

reg

33 ELECTRICAL CONNECTION

All electrical connections from the AAON Temperature Transmitter to the AAON Airflow

Signal Processor have been made at the factory as shown in Figure 1 below Figure 2 shows the

AAON Temperature Transmitter positive and negative connector locations The following

procedure outlines the steps for checking the interface wiring if required

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

9

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor and

the AAON Temperature Transmitter cover by turning each screw counter

clockwise

Step 2 Remove the covers

Step 3 Verify that the Power Switch (S3) on the AAON Airflow Signal Processor is in

the OFF position

Step 4 Confirm the installation of the interface wiring for Pins 4 and 5 on the AAON

Airflow Signal Processor are connected to the positive and negative connectors on

the AAON Temperature Transmitter as shown in Figures 1 and 2 The three

electrical connectors (J1 J2 and optional J3) on the AAON Airflow Signal

Processor have removable terminal blocks for ease of installing the interface

wiring

Step 5 Verify that the Temp Input Switch (S1) on the AAON Airflow Signal Processor is

set to the mA position

Step 6 Turn the Power Switch (S3) on the AAON Airflow Signal Processor to the ON

position see Section 461 and 462 for display descriptions

Step 7 Replace the covers by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

(4-20mA LOOP

POWERED)+

- TRANSMITTER

S1S2 S4

+ 24VDC OUTPUT POWER

- TEMPERATURE INPUT(GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATIONS

- NETWORK COMMUNICATIONS

- PROCESS OUTPUT(GND)

+ PROCESS OUTPUT

8

10

9

4

6

7

5

J2

TEMPERATURE

S1 SET TO

mA POSITION

Figure 1 - Electrical Connections

10

+-

4-2

0m

A C

urre

nt L

oop

BACK SIDE OF COVER

RTD CONNECTION

Figure 2 - Temperature Transmitter Positive amp Negative Connectors

11

4 AIRFLOW SIGNAL PROCESSOR

41 SPECIFICATIONS

Power Supply 411

20 to 28 VACDC

Power Consumption 412

250mA at 24VAC

175mA at 24VDC

Accuracy 413

plusmn025 full scale

Temperature Input 414

4-20mA

Process Output Options 415

0-5VDC

0-10VDC

4-20mA (700Ω maximum load)

HighLow Alarm Relay Outputs 416

Two single (1 form C) dry contacts rated for

5 amps at 30VACDC

10 amps at 120VAC

42 SAFETY

Electrical Connections 421

Before any electrical connections are made ensure the POWER SWITCH is in the OFF

position

Static Electricity 422

The circuit board contains components which are susceptible to damage caused by static

electrical discharge Should it be necessary to remove the circuit board from the enclosure

appropriate precautions must first be taken to ensure that the operator and the circuit board are at

the same electrical potential

12

43 DIMENSIONS

100000ACFM

75 F

J1 J2

TOTALCONNECTION

STATICCONNECTION

462

5785

2265

350

525

Air Fl o wS IGN AL PROCES S OR

AAON

44 ELECTRICAL amp PNEUMATIC CONNECTIONS

All electrical and pneumatic connections to the AAON Airflow Signal Processor have been

made at the factory as shown in Figures 3 through 5 below with the exception of the electrical

connection for the HighLow Alarm Option if ordered and for network communication options

other than with WattMaster Controls The following procedure outlines the steps for turning

ON the AAON Airflow Signal Processor if network communication is required see Section

411 prior to turning ON the AAON Airflow Signal Processor

Caution ndash If electrical connections need to be rewired all electrical connections must be made

with the AAON Airflow Signal Processor Power Switch in the OFF position The three

electrical connectors (J1 J2 and optional J3) have removable terminal blocks for ease of

installing the interface wiring

13

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 4 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

(24VACDC)

POWER SUPPLY

ANALOG RECEIVING DEVICE

PROCESS OUTPUT

S1S2 S4

+

-

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

SWITCH POSITIONS

SHOWN IN BLACK

S1 POSITION

INDICATING 4-20mA

TEMPERATURE INPUT

S2 AND S4 POSITIONS

INDICATING 0-10VDC

PROCESS OUTPUT

RP1

S3

AAON

TEMPERATURE

TRANSMITTER

(4-20mA LOOP POWERED)+

-

Figure 3 - Electrical Connections

14

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROCOUTPUT

mA

V

10V

5V

(24VACDC)

POWER SUPPLY

ANALOG RECEIVING DEVICE

PROCESS OUTPUT

S1S2 S4

+

-

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

SWITCH POSITIONS

SHOWN IN BLACK

S1 POSITION

INDICATING 4-20mA

TEMPERATURE INPUT

S2 AND S4 POSITIONS

INDICATING 0-10VDC

PROCESS OUTPUT

RP1

S3

E-BUS DISTRIBUTION MODULE

+-

AAON

TEMPERATURE

TRANSMITTER

(4-20mA LOOP POWERED)+

-

- COMM

+ COMM

GND

THE SHIELDING WIRE SHOULD BE USED TO

CONNECT WATTMASTER GROUND TO AIRFLOW

SIGNAL PROCESSOR GROUND

Figure 4 - Electrical Connection with Wattmaster Controls

15

J1 J2

TOTAL

CONNECTION

STATIC

CONNECTION

TOTAL PRESSURE CONECTION

AAON AIRFLOW STATION

STATIC PRESSURE CONNECTION

AAON AIRFLOW STATION

Figure 5 - Pneumatic Connections

45 INPUTOUTPUT SET-UP

If input or output configuration changes are required refer to the Tables 1 and 2 in the sections

below and Figure 3 in Section 44

Process Output 451

If controls are provided by AAON the process output has been set by the factory for input to the

specific controller otherwise the default is 0-10VDC To change the output configuration set

the S2 amp S4 switches as follows

Table 1 - Process Output Switch Configuration

Process Output Range S2 S4

Current 4-20mA NA mA

Voltage 0-10VDC 10V V

Voltage 0-5VDC 5V V

Temperature Input 452

Since the AAON Temperature Transmitter has been provided the temperature input has been set

by the factory for 4-20mA To change the input configuration set the S1 switch as follows

Table 2 - Temperature Input Switch

Configuration

Temperature Input S1 Switch Selection

4-20mA mA

0-10VDC V

16

46 ACTIVE DISPLAYS amp KEY FUNCTIONS

Power-up Initiation Display 461

Upon initial power-up Software Revision information will be displayed on the graphic display

for approximately 5 seconds

EQ-1

Software Rev XXXXX

Modbus Rev XXXXX

Process Display Descriptions 462

After power-up initialization the following information will appear on the graphic display

depending upon the options purchased

75˚F

75˚F

75˚F

000000

000000

000000

AutoZero

ACFM

High Alarm

ACFM

Low Alarm

ACFM

Flow Monitoring with an

Auto Zero Cycle

Flow Monitoring with a

High Alarm Condition

Flow Monitoring with a

Low Alarm Condition

Table 3 - Process Display Descriptions

Number Description

1 Process value

2 Air Flow temperature units in degree F or C

3 Flashing Asterisk indicates the CPU is functioning

4 Engineering units

5 Displayed during an AutoZero cycle

6 Indicating High Alarm Value has been exceeded (HighLow Alarm Option)

7 Indicating Low Alarm Value has been exceeded (HighLow Alarm Option)

12 3

4

6

7 5

17

Key Functions 463

The following figure and description identify the function of each Key

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

2

13

4

567

8

RP1 9

Figure 6 - Key Functions

Table 4 - Key Functions

Number Description

1 Enter Key - Allows a user to enter into the Field Menu enter into a selected menu item

or store into memory changes made to the program

2 Up Key - Allows the user to scroll up in the menu list to a selected item or increase digits

when making value changes

3 Right Key - When making changes to user values the Right Key allows the user to scroll

to the correct digit for changes

4 Down Key - Allows the user to scroll down in the menu list to a selected item or

decrease digits when making value changes

5 Left Key - When making changes to user values the Left Key allows the user to scroll to

the correct digit for changes

6

Escape Key - The Escape Key allows the user to back out of the menu to the Active

Display If a user starts to make a change and decides to cancel the change the Escape

Key will allow the user to return to the Active Display without making the change

7 Power Switch ndash Allows a user to turn power off to the AAON Signal Processor during

field wiring or modifications to the device

8 Lon Switch ndash Allows a user to send a unique Neuron device ID when connecting to a

LonWorks communication network

9 RP1 ndash Allows a user to adjust the display contrast

18

47 DISPLAY MENUS

Table 5 shows the Field Setup and Tech Configuration Menus The display will vary depending

upon the options purchased

Table 5 - Display Menus

Field Setup Menu

(Press ENTER Key)

Tech Configuration Menu

(Press UPDOWN Keys simultaneously)

(Enter Password number 1000)

(Press ENTER Key)

Operating Range Area Factor

Zero Calibration Min Calibration

Eng Units Span Calibration

Lockdown Temp Fixed Value

Flow Correction Altitude

AutoZero Output Calibration

Temp Comp Correction Coeff

Display Filter 4PT Flow Corr

Output Filter MAC Address (Optional)

Alarm Options (Optional) Instance Number (Optional)

Factory Defaults Modbus ID (Optional)

Baud Rate (Optional)

48 FIELD SETUP MENUS

To set parameters under the Field Setup Menus refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Field Setup Menu by depressing and holding the Enter Key for 5

seconds

Step 2 Once in the Field Setup Menu use the UpDown Keys to highlight the

required parameter for configuration as shown in Sections 481 through

4811 Press the Enter Key once to access the highlighted parameter

Menu

Step 3 Once in the parameter menu the parameter can be changed using

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Field

Setup Menu

Step 4 After all of the required parameters have been configured exit the Field

Setup Menu by pressing the ESC Key The Process Display (see Section

462) will then be displayed

19

Operating Range 481

The Operating Range allows the user to enter a value which will represent 100 of the process

output signal (5VDC 10VDC or 20mA) The Operating Range Value has been set by the

factory to equal 110 of the design supply flow rate unless this value is less than the Minimum

Full Scale Value allowed for the AAON Airflow Signal Processor The menu will display the

Minimum Full Scale Value allowed which is then entered as the Operating Range

Field Setup

Menu

Operating Range Operating Range

Zero Calibration ( ACFM )

Engineering Units (6000-12000)

Lockdown (010000)

Zero Pressure Calibration 482

The Zero Calibration Menu allows the user to perform a zero transducer calibration to eliminate

any transducer zero shift

(Caution Before performing a zero calibration disconnect the Total (High) and Static (Low)

pressure connections perform a zero calibration and then reconnect the Total and Static

pressure connections)

Field Setup

Menu

Operating Range Input Value CPU Taking

Zero Calibration (0000) Inch wc Samples

Engineering Units

Lockdown (Press Enter) (Please Wait)

Engineering Units 483

Table 6 lists the engineering units that are available for the user to select from for display

purposes Changing the engineering units will affect the process display and the alarm value

menus The default setting is ACFM

Field Setup

Menu

Operating Range Eng Units

Zero Calibration

Engineering Units (ACFM)

Lockdown

20

Table 6 - Engineering Units

Standard

Flow

Units

Actual

Flow

Units

SCFM ACFM

SCFH LS

SLS Am3S

Sm3S Am3M

Sm3M Am3HR

Sm3HR

Lockdown 484

Due to the high square root gain associated with very low delta p values the display and process

output are locked to a zero value until the input value reaches the specified Lockdown Value that

was entered Above the Lockdown Value the output is linear to air flow

4841 Lockdown Value

The Lockdown Value can be changed from 0 to 20 of Operating Range Value Lockdown

Values can be changed in 1 increments The recommended standard is 5

Field Setup

Menu

Operating Range Lockdown (0-20)

Zero Calibration (5)

Engineering Units Delay (0-20 sec)

Lockdown (2) Sec

4842 Lockdown Delay

The Lockdown Delay Menu allows the user to enter a lockdown time delay (0-20 seconds) that

will delay the display and output lockdown from occurring until the flow value or output value

has remained below the lockdown value for that duration

Field Setup

Menu

Operating Range Lockdown (0-20)

Zero Calibration (5)

Engineering Units Delay (0-20 sec)

Lockdown (2) Sec

21

Flow Correction 485

The Flow Correction Menu was incorporated into the AAON Airflow Signal Processor to give

the user an easy way to make corrections to the display and output without changing the

Operating Range Value entered by the factory or user The Flow Correction Menu would be

used to correct for a constant error from zero to the entered Operating Range Value

4851 Flow Correction (K-Factor)

If the user knows the change required to match the balancers reading select the K-Factor

Menu and enter this value for the K-Factor The minimum and maximum allowable K-Factor

Value is displayed in the K-Factor Menu

Field Setup

Menu

Flow Correction Flow Correction

AutoZero K-Factor K-Factor Range

Temp Comp (085 13)

Display Filter K-Factor Calc K=(01000)

4852 Flow Correction (K-Factor Calculator)

If the new K-factor Value needs to be calculated select the K-Factor Calc Menu Enter the

Displayed Value on the AAON Airflow Signal Processor and actual Measured Value press

Enter and the change will be calculated and stored as the new K-Factor Value

Field Setup

Menu

Flow Correction Displayed Value

AutoZero K-Factor (000000)

Temp Comp Measured Value

Display Filter K-Factor Calc (000000)

-FLOW CORRECTION EXAMPLE-

The balancer is consistently measuring a value of 9500 CFM which is 500 CFM less than the

10000 CFM value on the AAON Airflow Signal Processor display The user would then

perform the following math function Measured Value Displayed Value = K-Factor so 9500

CFM 10000 CFM = 0950 The user would enter 0950 for the K-Factor Flow Correction If

the K-Factor Calculator is used the K- Factor Flow Correction would automatically update the K

Factor

AutoZero 486

The AutoZero feature corrects any zero offset caused by large ambient temperature changes

22

4861 AutoZero Status

The AutoZero Status Menu allows the user to turn the AutoZero function ON or OFF

Field Setup

Menu

Flow Correction AZ Status AZ Status

AutoZero AZ Interval (ONOFF)

Temp Comp AZ Test Interval

Display Filter (ON)

4862 AutoZero Interval

The AutoZero Interval Menu allows the user to select the AutoZero Interval from once an hour

to once a day in 1 hour increments Use the UPDOWN keys to select the interval value Upon

device power up an AutoZero cycle will occur after 20 seconds

Field Setup

Menu

Flow Correction AZ Status AZ Interval

AutoZero AZ Interval (1 TO 24HR)

Temp Comp AZ Test Interval

Display Filter (01)HR

4863 AutoZero Test Interval

For troubleshooting or testing the AutoZero function the AutoZero Test Interval Menu allows

the user to select an Auto Zero test frequency of once a minute to once every 30 minutes in 1

minute increments Use the UPDOWN keys to select the interval value If AutoZero Test

Interval is turned ON for more than 60 minutes it will automatically default to OFF and the

AutoZero Interval (see Section 4862) will be reactivated

Field Setup

Menu

Flow Correction AZ Status AZ Test Interval

AutoZero AZ Interval (OFF)

Temp Comp AZ Test Interval Interval

Display Filter (1)Min

Temperature Compensation 487

The Temperature Compensation option compensates the flow and velocity signal for density

changes caused by variations in the process air temperature An input signal from AAON

Temperature Transmitter is required see Section 33 for proper temperature transmitter

connection and Section 452 for temperature input signal configuration

23

4871 Temperature Units

The Temperature Units Menu allows the user to select the appropriate temperature units for the

job The default setting is ordmF

Field Setup

Menu

Flow Correction Temperature Units Units

AutoZero Temperature Values (ordmF ordmC)

Temp Comp Temperature Input

Display Filter Fixed Value (ordmF)

4872 Temperature Values

The Temperature Values Menu allows the factory or user to set the minimum and maximum

temperature range values that represent the input signal from the external temperature transmitter

or the building automation system Since the AAON Temperature Transmitter has been supplied

the minimum and maximum temperature range values of -30degF to 130degF have been

preprogramed

Field Setup

Menu

Flow Correction Temperature Units Minimum Value

AutoZero Temperature Values (-030)

Temp Comp Temperature Input Maximum Value

Display Filter Fixed Value (130)

If the temperature values are changed from the factory settings and the new temperature values

cause the existing Operating Range Value to be outside the new calculated Minimum or

Maximum Full Scale Value the below Warning Message will appear and the Operating Range

will be reset to the new Maximum Full Scale Value by pressing Enter The display will

automatically jump to the Operating Range Menu allowing the user to enter a new Operating

Range Value This can be accomplished by performing the steps under Section 481 See

Temperature Range Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

24

Minimum Value

(-000)

Maximum Value

(000)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Min amp

Max Temperature

value and pressing the

Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Temperature Range Example-

Minimum Value

(-000)

Accepted

(100)

4873 Temperature Input

The Temperature Input Menu allows the user to select between three temperature input options

(Fixed Variable and Network) for the flow calculations Since the AAON Temperature

Transmitter has been supplied Variable has been selected If Fixed is selected the default

temperature value entered in the Fixed Value Menu (see Section 4874) is used If Net is

selected the temperature input signal is obtained through network communications The Net

option is only available if one of the communication options is ordered The temperature value

is only displayed on the LCD screen if the Temperature Input is set to Variable or Network

Field Setup

Menu

Flow Correction Temperature Units Temp Input

AutoZero Temperature Values (FixVarNet)

Temp Comp Temperature Input

Display Filter Fixed Value (Variable)

25

4874 Fixed Value

The Fixed Value Menu allows the user to enter a temperature value for the flow calculations

This value will not be displayed on the LCD screen

Field Setup

Menu

Flow Correction Temperature Units Fixed Value

AutoZero Temperature Values (˚F)

Temp Comp Temperature Input

Display Filter Fixed Value (+068)

Display Filter 488

The Display Filter Menu allows the user to adjust the Display Filter rolling average algorithm by

setting the Sample Interval Time value in seconds and the number of rolling average Sample

Counts The adjustment range of the Sample Interval Time is 010 to 655 seconds in 010

increments The Sample Count range is 0 to 150 Sample Counts The Display Filter is

independent of the Process Output Filter Value (See Section 489)

Field Setup

Menu

Flow Correction Sample Interval Time

AutoZero (005)sec

Temp Comp (0-150) Sample Count

Display Filter (010)

Process Output Filter 489

The Process Output Filter Menu allows the user to adjust the Process Output Filters rolling

average algorithm by setting the Sample Interval Time value in seconds and the number of

rolling average Sample Counts The adjustment range of the Sample Interval Time is 010 to

655 seconds in 010 increments The Sample Count range is 0 to 150 Sample Counts The

Process Output Filter is independent of the Display Filter Value (See Section 488)

Field Setup

Menu

Output Filter Sample Interval Time

Alarm Options (005)sec

Factory Defaults (0-150) Sample Count

(010)

26

HighLow Alarm Option 4810

The following menus for configuration of HighLow Alarms are only available if the HighLow

Alarm option is purchased

48101 Alarm Status

The Alarm Status allows the user to independently turn each alarm ON or OFF

Field Setup

Menu

Output Filter Alarm Status Low Alarm

Alarm Options Alarm Value (On)

Factory Defaults Alarm Delay High Alarm

(On)

48102 Alarm Values

The Alarm Value Menu allows the user to enter the Low or the High flow alarm value Alarm

values will be displayed in the same engineering units selected in the Eng Units Menu (see

Section 483)

- High Alarm Function The High Alarm activates if the flow exceeds the High Alarm

value and resets when the flow drops below the High Alarm Value

- Low Alarm Function The Low Alarm activates if the flow drops below the Low

Alarm Value and resets when the flow exceeds the Low Alarm Value

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Value

Alarm Options Alarm Value (000000)

Factory Defaults Alarm Delay Hi Alarm Value

(100000)

48103 Alarm Delay

The Alarm Delay Menu allows the user to enter an alarm delay of 0 to 999 seconds before an

alarm will be activated The alarm will be reset without a delay

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Delay

Alarm Options Alarm Value (000)Seconds

Factory Defaults Alarm Delay Hi Alarm Delay

(000)Seconds

27

Factory Defaults 4811

If parameter configuration changes have been made incorrectly to the AAON Airflow Signal

Processor all device settings can be restored to the original AAON factory settings by selecting

YES and pressing Enter in both the Set To Factory Defaults Menu and the Verify Set To Factory

Defaults Menu (see Table 7 below for a list of Saved Settings)

Field Setup

Menu

Output Filter Set To Verify Set To

Alarm Options Factory Defaults Factory Defaults

Factory Defaults

(No) (No)

Table 7 - Factory Defaults

Item Saved Setting Item Saved Setting

1 All Factory Calibration Points (12) 14 MAC Address

2 Area Factor 15 Instance Number

3 Operating Range 16 Engineering Units

4 4 Pt Flow Correction 17 Display Filter Values

5 Altitude 18 Output Filter

6 K-Factor 19 DP Display Format

7 Lockdown amp Delay Values 20 Output Calibration

8 Flow Correction 21 AutoZero Status

9 Flow Coefficient 22 AutoZero Interval

10 Min amp Max Temp Range Values 23 Temp Units

11 Alarm Status 24 Temp Input

12 Alarm Values 25 Temp Fixed Value

13 Alarm Delay 26 Baud Rate

28

49 TECH CONFIGURATION MENUS

To set parameters under the Tech Configuration Menu refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 491

through 4911 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

Area Factor 491

To convert the differential pressure signal from the AAON Airflow Station to a flow value the

Area Factor associated with the AAON Airflow Station has been preprogramed by the factory

If the Area Factor needs to be checked or reconfigured the correct Area Factor for the AAON

Airflow Station can be found on the AAON Airflow Station product label installed in the air

handling unit

Tech Config

Password 1000

Area Factor Area Factor

Min Calibration (FT2)

Span Calibration

Altitude (001000)

29

If the Area Factor is reconfigured and the new Area Factor causes the existing Operating Range

Value to be outside the new calculated Minimum or Maximum Full Scale Value the below

Warning Message will appear and the Operating Range will be reset to the new Maximum Full

Scale Value by pressing Enter The display will automatically jump to the Operating Range

Menu allowing the user to enter a new Operating Range Value This can be accomplished by

performing the steps under Section 481 See Area Factor Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Area Factor

(FT )

(001000)

Area Factor

(FT )

Accepted

(001200)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Area

Factor and pressing

the Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Area Factor Example-

2

2

30

Minimum Calibration 492

The Minimum Calibration Menu allows a user to perform a minimum transducer calibration

This value will be placed in a different memory location and used until a Return to Factory

Defaults is selected (see Section 4811)

(Caution Before performing a minimum calibration disconnect the Total (High) and Static

(Low) Pressure connections perform a minimum calibration and then reconnect the Total

and Static Pressure connections)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00000) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Span Calibration 493

The Span Calibration Menu allows the user to perform a span transducer calibration to eliminate

any possible transducer drift This value will be placed in a different memory location than the

Factory Span memory location and used until a Return to Factory Defaults is selected (see

Section 4811)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00570) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Altitude 494

The Altitude Menu allows the user to enter the specific altitude for the job for the density

calculations the job specific site Altitude has been preprogramed by the factory

Tech Config

Password 1000

Area Factor Altitude

Min Calibration

Span Calibration (0000)Ft

Altitude

31

If the Altitude is changed from the factory setting and the new Altitude causes the existing

Operating Range Value to be outside the new calculated Minimum or Maximum Full Scale

Value the below Warning Message will appear and the Operating Range will be reset to the new

Maximum Full Scale Value by pressing Enter The display will automatically jump to the

Operating Range Menu allowing the user to enter a new Operating Range Value This can be

accomplished by performing the steps under Section 481 See Altitude Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Altitude

(0000)Ft

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Altitude

and pressing the Enter

button will calculate

new Min amp Max Op

Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Altitude Example-

Altitude

Accepted

(0100)Ft

32

Process Output Calibration 495

4951 Minimum Calibration

The Minimum Calibration Menu allows the user to make output zero adjustments Monitor the

output and with each Up or Down key depression the output will increase or decrease by

001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

4952 Span Calibration

The Span Calibration Menu allows the user to make output span adjustments Span adjustments

require a low pressure air source adjusted to the Full Scale Value shown on the side label

Monitor the output and with each Up or Down button depression the output will increase or

decrease by 001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

Probe Coefficient 496

The Probe Correction Coefficient Menu allows the user to modify the formula constant of

109670 used for non-amplified Pitot-type flow sensors

Tech Config

Password 1000

Output Calibration Correction Coeff

Correction Coeff Probe

4PT Flow Corr (109670)

MAC Address (00109670)

33

Four Point Flow Correction 497

The Four Point Flow Correction Menu allows the user to make corrections to the display and

output signal at 20 increments between 20 and 80 of the Operating Range Value entered

The Displayed Value is a fixed value determined by the percentage of Operating Range The

Measured Value is the value determined by an independent balancerrsquos reading

Tech Config

Password 1000

Output Calibration 80000 CFM Displayed Value

Correction Coeff 60000 CFM 80000

4PT Flow Corr 40000 CFM Measured Value

MAC Address 20000 CFM 79500

80000 CFM Displayed Value

60000 CFM 60000

40000 CFM Measured Value

20000 CFM 60500

80000 CFM Displayed Value

60000 CFM 40000

40000 CFM Measured Value

20000 CFM 40100

80000 CFM Displayed Value

60000 CFM 20000

40000 CFM Measured Value

20000 CFM 19500

MAC Address (BACnet Communication Option) 498

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network The default is 002 For

additional information refer to Section 411

Tech Config

Password 1000

Output Calibration MAC Address

Correction Coeff (Range = 02 to 254)

4PT Flow Corr

MAC Address (002)

34

Instance Number (BACnet Communication Option) 499

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The default is 1002 For

additional information refer to Section 411

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (Default = 1002)

Instance Number

Modbus ID (01002)

Modbus ID (Modbus Communication Option) 4910

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network The default is 002 For

communication with WattMaster Controls the Modbus ID has been set by the factory to 009 for

outside airflow applications For additional information refer to the Section 411

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

Baud Rate (BACnet amp Modbus Communication Options) 4911

The Baud Rate Menu allows the user to set a unique network baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate Modbus communications supports

96 192 384 576 and 1152 Kbps baud rate The default is 384 Kbps For communication

with WattMaster Controls the Baud Rate has been set by the factory to 96 Kbps For additional

information refer to Section 411

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

35

410 WARNING MESSAGES

Input Pressure Overrange Message 4101

If the input pressure exceeds the entered Operating Range Value the following message will

appear on the display It will alternate between the process display and the error message until

the input falls below the Operating Range Value

- Caution -

Input Beyond

Operating Range

Selected

Transducer Calibration Message 4102

If during a transducer zero or span calibration process the transducer output pressure value

measured exceeds plusmn20 of the expected value the following message will appear on the display

Once the Enter button is pressed the display returns to the previous calibration menu

Value entered is

Outside Factory

set limits

(Press Enter)

Operating Range Message 4103

If the new values entered for Temperature Compensation Area Factor or Altitude (see Sections

487 491 and 494) causes the Operating Range Value to exceed the new calculated

Maximum Full Scale Value the following message will appear on the display

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

New Operating Range Message 4104

If a user enters a new Operating Range Value the following message will appear on the display

notifying the user that if any 4 PT Flow Correction Values (see Section 497) were previously

entered they will be reset The message allows the user to confirm that the Operating Range

change should be made To complete the Operating Range change the user must use the

UPDown buttons to change the NO to a YES and press the ENTER button

Value will

Reset 4PT

Flow Correction

Values

Make the Change

(NO)

(Press Enter)

36

411 NETWORK COMMUNICATION

The AAON Airflow Signal Processor can be ordered with BACnet Modbus or LonWorks

Communication For BACnet Communication the AAON Airflow Signal Processors utilize

MSTP (Master SlaveToken Passing) BACnet type protocol BACnet is implemented using

EIA-485 signaling standards through a shielded twisted pair wire operating at a baud rate of 96

Kbps to 768 Kbps Each device has a unique MAC Address ranging from 2 to 127 Refer to

Section 4113 for BACnet Protocol Implementation Conformance Statements (PICS) For

Modbus Communication the AAON Airflow Signal Processors utilize the Modbus ndash RTU Slave

protocol using EIA-485 signaling standards through a shielded twisted pair wire operating at a

baud rate of 96 Kbps to 1152 Kbps Each device has a unique Modbus ID ranging from 1 to

254 Refer to Section 4114 for Modbus software configuration parameters For LonWorks

Communication each AAON Airflow Signal Processor has a unique Neuron Chip ID which is

loaded on the network by pressing a service switch located on the main board (see Section

4111 Figure 7) The LonWorks network utilizes a shielded twisted pair wire operating at a

fixed baud rate of 78 Kbps Refer to Section 4115 for LonWorks network variables

Sections 4111 and 4112 contain procedures for electrical connection of the AAON Airflow

Signal Processor to the network and for configuring the required communication parameters

Electrical Connection 4111

The following procedure outlines the steps for installing the interface wiring for network

communication Network wire should be low capacitance shielded 22 or 24 AWG twisted pair

with PVC jacket such as Belden Part numbers 9841 3105A or equivalent

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Verify that the Power Switch (S3) is in the OFF position and install the interface

wiring for Pins 9 and 10 as shown in Figure 7 If multiple AAON Airflow Signal

Processors will be connected to the same network see Figure 8 for connecting

multiple devices For network systems that require all devices to have a common

signal ground refer to Figure 9 for electrical connection The J2 electrical

connector has a removable terminal block for ease of installing the interface

wiring

Step 4 For proper operation of BACnet and Modbus communication networks the

device that is electrically installed at the end of the network may require the

Terminator Switch be moved to the ON position to prevent line and data

reflection If Terminator is required it must be applied to both physical ends of

the network All other devices should have the Terminator Switch in the OFF

position The communication board is located on the back side of the main

AAON Airflow Signal Processor board See Figure 10 below for Terminator

Switch location on the communication board

Step 5 For LonWorks Communication refer to Figure 7 for the location of the Lon

Service Pin

37

Step 6 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 7 Configure the required parameters as outlined in Section 4112

Step 8 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

RP1

S3

NETWORK

COMMUNICATION+

-

LON

SERVICE PIN

Figure 7 - Network Communication Electrical Connection

38

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

AAON AIRFLOW

SIGNAL PROCESSOR

CONNECT ONLY ONE END OF SHIELD

WIRE TO EARTH GROUND AS SHOWN

SET TERMINATOR SWITCH

ON IF REQUIRED

NETWORK

COMMUNICATIONS

NETWORK

CONNECT SHIELD

WIRES TOGETHER

CONNECT SHIELD

WIRES TOGETHER

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not

Requiring Common Signal Grounds

Note If using two conductor communication wire use the shield wire to connect all device signal grounds together as shown in the figure below If using three conductor communication wire use the 3rd conductor to connect all device signal grounds together and connect one side of the shield to earth ground

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

SIGNAL

GROUND

8

J2

SIGNAL

GROUND

8

J28

J2

USE SHIELD WIRE OR 3RD CONDUCTOR TO

CONNECT DEVICE SIGNAL GROUND TO

NETWORK SIGNAL GROUND

SET TERMINATOR SWITCH

ON IF REQUIRED

AAON AIRFLOW

SIGNAL PROCESSOR

NETWORK

COMMUNICATIONS

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

SIGNAL

GROUND

SIGNAL

GROUND

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds

39

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location

COMMUNICATION BOARD ID

BOARD SERIAL NO

40

Parameter Configuration 4112

If BACnet or Modbus communication is ordered the associated settings will need to be

configured with the exception of Modbus communication with WattMaster Controls which has

been configured at the factory To set the parameters refer to the following procedure below

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 41121

through 41124 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

41121 MAC Address (BACnet Communication Option)

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network Each AAON Airflow Signal

Processor must have a unique MAC Address assigned ranging from 2 to 127

Tech Config

Password 1000

4PT Flow Corr MAC Address

MAC Address (Range = 02 to 254)

Instance Number

Modbus ID (002)

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 9: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

9

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor and

the AAON Temperature Transmitter cover by turning each screw counter

clockwise

Step 2 Remove the covers

Step 3 Verify that the Power Switch (S3) on the AAON Airflow Signal Processor is in

the OFF position

Step 4 Confirm the installation of the interface wiring for Pins 4 and 5 on the AAON

Airflow Signal Processor are connected to the positive and negative connectors on

the AAON Temperature Transmitter as shown in Figures 1 and 2 The three

electrical connectors (J1 J2 and optional J3) on the AAON Airflow Signal

Processor have removable terminal blocks for ease of installing the interface

wiring

Step 5 Verify that the Temp Input Switch (S1) on the AAON Airflow Signal Processor is

set to the mA position

Step 6 Turn the Power Switch (S3) on the AAON Airflow Signal Processor to the ON

position see Section 461 and 462 for display descriptions

Step 7 Replace the covers by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

(4-20mA LOOP

POWERED)+

- TRANSMITTER

S1S2 S4

+ 24VDC OUTPUT POWER

- TEMPERATURE INPUT(GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATIONS

- NETWORK COMMUNICATIONS

- PROCESS OUTPUT(GND)

+ PROCESS OUTPUT

8

10

9

4

6

7

5

J2

TEMPERATURE

S1 SET TO

mA POSITION

Figure 1 - Electrical Connections

10

+-

4-2

0m

A C

urre

nt L

oop

BACK SIDE OF COVER

RTD CONNECTION

Figure 2 - Temperature Transmitter Positive amp Negative Connectors

11

4 AIRFLOW SIGNAL PROCESSOR

41 SPECIFICATIONS

Power Supply 411

20 to 28 VACDC

Power Consumption 412

250mA at 24VAC

175mA at 24VDC

Accuracy 413

plusmn025 full scale

Temperature Input 414

4-20mA

Process Output Options 415

0-5VDC

0-10VDC

4-20mA (700Ω maximum load)

HighLow Alarm Relay Outputs 416

Two single (1 form C) dry contacts rated for

5 amps at 30VACDC

10 amps at 120VAC

42 SAFETY

Electrical Connections 421

Before any electrical connections are made ensure the POWER SWITCH is in the OFF

position

Static Electricity 422

The circuit board contains components which are susceptible to damage caused by static

electrical discharge Should it be necessary to remove the circuit board from the enclosure

appropriate precautions must first be taken to ensure that the operator and the circuit board are at

the same electrical potential

12

43 DIMENSIONS

100000ACFM

75 F

J1 J2

TOTALCONNECTION

STATICCONNECTION

462

5785

2265

350

525

Air Fl o wS IGN AL PROCES S OR

AAON

44 ELECTRICAL amp PNEUMATIC CONNECTIONS

All electrical and pneumatic connections to the AAON Airflow Signal Processor have been

made at the factory as shown in Figures 3 through 5 below with the exception of the electrical

connection for the HighLow Alarm Option if ordered and for network communication options

other than with WattMaster Controls The following procedure outlines the steps for turning

ON the AAON Airflow Signal Processor if network communication is required see Section

411 prior to turning ON the AAON Airflow Signal Processor

Caution ndash If electrical connections need to be rewired all electrical connections must be made

with the AAON Airflow Signal Processor Power Switch in the OFF position The three

electrical connectors (J1 J2 and optional J3) have removable terminal blocks for ease of

installing the interface wiring

13

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 4 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

(24VACDC)

POWER SUPPLY

ANALOG RECEIVING DEVICE

PROCESS OUTPUT

S1S2 S4

+

-

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

SWITCH POSITIONS

SHOWN IN BLACK

S1 POSITION

INDICATING 4-20mA

TEMPERATURE INPUT

S2 AND S4 POSITIONS

INDICATING 0-10VDC

PROCESS OUTPUT

RP1

S3

AAON

TEMPERATURE

TRANSMITTER

(4-20mA LOOP POWERED)+

-

Figure 3 - Electrical Connections

14

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROCOUTPUT

mA

V

10V

5V

(24VACDC)

POWER SUPPLY

ANALOG RECEIVING DEVICE

PROCESS OUTPUT

S1S2 S4

+

-

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

SWITCH POSITIONS

SHOWN IN BLACK

S1 POSITION

INDICATING 4-20mA

TEMPERATURE INPUT

S2 AND S4 POSITIONS

INDICATING 0-10VDC

PROCESS OUTPUT

RP1

S3

E-BUS DISTRIBUTION MODULE

+-

AAON

TEMPERATURE

TRANSMITTER

(4-20mA LOOP POWERED)+

-

- COMM

+ COMM

GND

THE SHIELDING WIRE SHOULD BE USED TO

CONNECT WATTMASTER GROUND TO AIRFLOW

SIGNAL PROCESSOR GROUND

Figure 4 - Electrical Connection with Wattmaster Controls

15

J1 J2

TOTAL

CONNECTION

STATIC

CONNECTION

TOTAL PRESSURE CONECTION

AAON AIRFLOW STATION

STATIC PRESSURE CONNECTION

AAON AIRFLOW STATION

Figure 5 - Pneumatic Connections

45 INPUTOUTPUT SET-UP

If input or output configuration changes are required refer to the Tables 1 and 2 in the sections

below and Figure 3 in Section 44

Process Output 451

If controls are provided by AAON the process output has been set by the factory for input to the

specific controller otherwise the default is 0-10VDC To change the output configuration set

the S2 amp S4 switches as follows

Table 1 - Process Output Switch Configuration

Process Output Range S2 S4

Current 4-20mA NA mA

Voltage 0-10VDC 10V V

Voltage 0-5VDC 5V V

Temperature Input 452

Since the AAON Temperature Transmitter has been provided the temperature input has been set

by the factory for 4-20mA To change the input configuration set the S1 switch as follows

Table 2 - Temperature Input Switch

Configuration

Temperature Input S1 Switch Selection

4-20mA mA

0-10VDC V

16

46 ACTIVE DISPLAYS amp KEY FUNCTIONS

Power-up Initiation Display 461

Upon initial power-up Software Revision information will be displayed on the graphic display

for approximately 5 seconds

EQ-1

Software Rev XXXXX

Modbus Rev XXXXX

Process Display Descriptions 462

After power-up initialization the following information will appear on the graphic display

depending upon the options purchased

75˚F

75˚F

75˚F

000000

000000

000000

AutoZero

ACFM

High Alarm

ACFM

Low Alarm

ACFM

Flow Monitoring with an

Auto Zero Cycle

Flow Monitoring with a

High Alarm Condition

Flow Monitoring with a

Low Alarm Condition

Table 3 - Process Display Descriptions

Number Description

1 Process value

2 Air Flow temperature units in degree F or C

3 Flashing Asterisk indicates the CPU is functioning

4 Engineering units

5 Displayed during an AutoZero cycle

6 Indicating High Alarm Value has been exceeded (HighLow Alarm Option)

7 Indicating Low Alarm Value has been exceeded (HighLow Alarm Option)

12 3

4

6

7 5

17

Key Functions 463

The following figure and description identify the function of each Key

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

2

13

4

567

8

RP1 9

Figure 6 - Key Functions

Table 4 - Key Functions

Number Description

1 Enter Key - Allows a user to enter into the Field Menu enter into a selected menu item

or store into memory changes made to the program

2 Up Key - Allows the user to scroll up in the menu list to a selected item or increase digits

when making value changes

3 Right Key - When making changes to user values the Right Key allows the user to scroll

to the correct digit for changes

4 Down Key - Allows the user to scroll down in the menu list to a selected item or

decrease digits when making value changes

5 Left Key - When making changes to user values the Left Key allows the user to scroll to

the correct digit for changes

6

Escape Key - The Escape Key allows the user to back out of the menu to the Active

Display If a user starts to make a change and decides to cancel the change the Escape

Key will allow the user to return to the Active Display without making the change

7 Power Switch ndash Allows a user to turn power off to the AAON Signal Processor during

field wiring or modifications to the device

8 Lon Switch ndash Allows a user to send a unique Neuron device ID when connecting to a

LonWorks communication network

9 RP1 ndash Allows a user to adjust the display contrast

18

47 DISPLAY MENUS

Table 5 shows the Field Setup and Tech Configuration Menus The display will vary depending

upon the options purchased

Table 5 - Display Menus

Field Setup Menu

(Press ENTER Key)

Tech Configuration Menu

(Press UPDOWN Keys simultaneously)

(Enter Password number 1000)

(Press ENTER Key)

Operating Range Area Factor

Zero Calibration Min Calibration

Eng Units Span Calibration

Lockdown Temp Fixed Value

Flow Correction Altitude

AutoZero Output Calibration

Temp Comp Correction Coeff

Display Filter 4PT Flow Corr

Output Filter MAC Address (Optional)

Alarm Options (Optional) Instance Number (Optional)

Factory Defaults Modbus ID (Optional)

Baud Rate (Optional)

48 FIELD SETUP MENUS

To set parameters under the Field Setup Menus refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Field Setup Menu by depressing and holding the Enter Key for 5

seconds

Step 2 Once in the Field Setup Menu use the UpDown Keys to highlight the

required parameter for configuration as shown in Sections 481 through

4811 Press the Enter Key once to access the highlighted parameter

Menu

Step 3 Once in the parameter menu the parameter can be changed using

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Field

Setup Menu

Step 4 After all of the required parameters have been configured exit the Field

Setup Menu by pressing the ESC Key The Process Display (see Section

462) will then be displayed

19

Operating Range 481

The Operating Range allows the user to enter a value which will represent 100 of the process

output signal (5VDC 10VDC or 20mA) The Operating Range Value has been set by the

factory to equal 110 of the design supply flow rate unless this value is less than the Minimum

Full Scale Value allowed for the AAON Airflow Signal Processor The menu will display the

Minimum Full Scale Value allowed which is then entered as the Operating Range

Field Setup

Menu

Operating Range Operating Range

Zero Calibration ( ACFM )

Engineering Units (6000-12000)

Lockdown (010000)

Zero Pressure Calibration 482

The Zero Calibration Menu allows the user to perform a zero transducer calibration to eliminate

any transducer zero shift

(Caution Before performing a zero calibration disconnect the Total (High) and Static (Low)

pressure connections perform a zero calibration and then reconnect the Total and Static

pressure connections)

Field Setup

Menu

Operating Range Input Value CPU Taking

Zero Calibration (0000) Inch wc Samples

Engineering Units

Lockdown (Press Enter) (Please Wait)

Engineering Units 483

Table 6 lists the engineering units that are available for the user to select from for display

purposes Changing the engineering units will affect the process display and the alarm value

menus The default setting is ACFM

Field Setup

Menu

Operating Range Eng Units

Zero Calibration

Engineering Units (ACFM)

Lockdown

20

Table 6 - Engineering Units

Standard

Flow

Units

Actual

Flow

Units

SCFM ACFM

SCFH LS

SLS Am3S

Sm3S Am3M

Sm3M Am3HR

Sm3HR

Lockdown 484

Due to the high square root gain associated with very low delta p values the display and process

output are locked to a zero value until the input value reaches the specified Lockdown Value that

was entered Above the Lockdown Value the output is linear to air flow

4841 Lockdown Value

The Lockdown Value can be changed from 0 to 20 of Operating Range Value Lockdown

Values can be changed in 1 increments The recommended standard is 5

Field Setup

Menu

Operating Range Lockdown (0-20)

Zero Calibration (5)

Engineering Units Delay (0-20 sec)

Lockdown (2) Sec

4842 Lockdown Delay

The Lockdown Delay Menu allows the user to enter a lockdown time delay (0-20 seconds) that

will delay the display and output lockdown from occurring until the flow value or output value

has remained below the lockdown value for that duration

Field Setup

Menu

Operating Range Lockdown (0-20)

Zero Calibration (5)

Engineering Units Delay (0-20 sec)

Lockdown (2) Sec

21

Flow Correction 485

The Flow Correction Menu was incorporated into the AAON Airflow Signal Processor to give

the user an easy way to make corrections to the display and output without changing the

Operating Range Value entered by the factory or user The Flow Correction Menu would be

used to correct for a constant error from zero to the entered Operating Range Value

4851 Flow Correction (K-Factor)

If the user knows the change required to match the balancers reading select the K-Factor

Menu and enter this value for the K-Factor The minimum and maximum allowable K-Factor

Value is displayed in the K-Factor Menu

Field Setup

Menu

Flow Correction Flow Correction

AutoZero K-Factor K-Factor Range

Temp Comp (085 13)

Display Filter K-Factor Calc K=(01000)

4852 Flow Correction (K-Factor Calculator)

If the new K-factor Value needs to be calculated select the K-Factor Calc Menu Enter the

Displayed Value on the AAON Airflow Signal Processor and actual Measured Value press

Enter and the change will be calculated and stored as the new K-Factor Value

Field Setup

Menu

Flow Correction Displayed Value

AutoZero K-Factor (000000)

Temp Comp Measured Value

Display Filter K-Factor Calc (000000)

-FLOW CORRECTION EXAMPLE-

The balancer is consistently measuring a value of 9500 CFM which is 500 CFM less than the

10000 CFM value on the AAON Airflow Signal Processor display The user would then

perform the following math function Measured Value Displayed Value = K-Factor so 9500

CFM 10000 CFM = 0950 The user would enter 0950 for the K-Factor Flow Correction If

the K-Factor Calculator is used the K- Factor Flow Correction would automatically update the K

Factor

AutoZero 486

The AutoZero feature corrects any zero offset caused by large ambient temperature changes

22

4861 AutoZero Status

The AutoZero Status Menu allows the user to turn the AutoZero function ON or OFF

Field Setup

Menu

Flow Correction AZ Status AZ Status

AutoZero AZ Interval (ONOFF)

Temp Comp AZ Test Interval

Display Filter (ON)

4862 AutoZero Interval

The AutoZero Interval Menu allows the user to select the AutoZero Interval from once an hour

to once a day in 1 hour increments Use the UPDOWN keys to select the interval value Upon

device power up an AutoZero cycle will occur after 20 seconds

Field Setup

Menu

Flow Correction AZ Status AZ Interval

AutoZero AZ Interval (1 TO 24HR)

Temp Comp AZ Test Interval

Display Filter (01)HR

4863 AutoZero Test Interval

For troubleshooting or testing the AutoZero function the AutoZero Test Interval Menu allows

the user to select an Auto Zero test frequency of once a minute to once every 30 minutes in 1

minute increments Use the UPDOWN keys to select the interval value If AutoZero Test

Interval is turned ON for more than 60 minutes it will automatically default to OFF and the

AutoZero Interval (see Section 4862) will be reactivated

Field Setup

Menu

Flow Correction AZ Status AZ Test Interval

AutoZero AZ Interval (OFF)

Temp Comp AZ Test Interval Interval

Display Filter (1)Min

Temperature Compensation 487

The Temperature Compensation option compensates the flow and velocity signal for density

changes caused by variations in the process air temperature An input signal from AAON

Temperature Transmitter is required see Section 33 for proper temperature transmitter

connection and Section 452 for temperature input signal configuration

23

4871 Temperature Units

The Temperature Units Menu allows the user to select the appropriate temperature units for the

job The default setting is ordmF

Field Setup

Menu

Flow Correction Temperature Units Units

AutoZero Temperature Values (ordmF ordmC)

Temp Comp Temperature Input

Display Filter Fixed Value (ordmF)

4872 Temperature Values

The Temperature Values Menu allows the factory or user to set the minimum and maximum

temperature range values that represent the input signal from the external temperature transmitter

or the building automation system Since the AAON Temperature Transmitter has been supplied

the minimum and maximum temperature range values of -30degF to 130degF have been

preprogramed

Field Setup

Menu

Flow Correction Temperature Units Minimum Value

AutoZero Temperature Values (-030)

Temp Comp Temperature Input Maximum Value

Display Filter Fixed Value (130)

If the temperature values are changed from the factory settings and the new temperature values

cause the existing Operating Range Value to be outside the new calculated Minimum or

Maximum Full Scale Value the below Warning Message will appear and the Operating Range

will be reset to the new Maximum Full Scale Value by pressing Enter The display will

automatically jump to the Operating Range Menu allowing the user to enter a new Operating

Range Value This can be accomplished by performing the steps under Section 481 See

Temperature Range Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

24

Minimum Value

(-000)

Maximum Value

(000)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Min amp

Max Temperature

value and pressing the

Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Temperature Range Example-

Minimum Value

(-000)

Accepted

(100)

4873 Temperature Input

The Temperature Input Menu allows the user to select between three temperature input options

(Fixed Variable and Network) for the flow calculations Since the AAON Temperature

Transmitter has been supplied Variable has been selected If Fixed is selected the default

temperature value entered in the Fixed Value Menu (see Section 4874) is used If Net is

selected the temperature input signal is obtained through network communications The Net

option is only available if one of the communication options is ordered The temperature value

is only displayed on the LCD screen if the Temperature Input is set to Variable or Network

Field Setup

Menu

Flow Correction Temperature Units Temp Input

AutoZero Temperature Values (FixVarNet)

Temp Comp Temperature Input

Display Filter Fixed Value (Variable)

25

4874 Fixed Value

The Fixed Value Menu allows the user to enter a temperature value for the flow calculations

This value will not be displayed on the LCD screen

Field Setup

Menu

Flow Correction Temperature Units Fixed Value

AutoZero Temperature Values (˚F)

Temp Comp Temperature Input

Display Filter Fixed Value (+068)

Display Filter 488

The Display Filter Menu allows the user to adjust the Display Filter rolling average algorithm by

setting the Sample Interval Time value in seconds and the number of rolling average Sample

Counts The adjustment range of the Sample Interval Time is 010 to 655 seconds in 010

increments The Sample Count range is 0 to 150 Sample Counts The Display Filter is

independent of the Process Output Filter Value (See Section 489)

Field Setup

Menu

Flow Correction Sample Interval Time

AutoZero (005)sec

Temp Comp (0-150) Sample Count

Display Filter (010)

Process Output Filter 489

The Process Output Filter Menu allows the user to adjust the Process Output Filters rolling

average algorithm by setting the Sample Interval Time value in seconds and the number of

rolling average Sample Counts The adjustment range of the Sample Interval Time is 010 to

655 seconds in 010 increments The Sample Count range is 0 to 150 Sample Counts The

Process Output Filter is independent of the Display Filter Value (See Section 488)

Field Setup

Menu

Output Filter Sample Interval Time

Alarm Options (005)sec

Factory Defaults (0-150) Sample Count

(010)

26

HighLow Alarm Option 4810

The following menus for configuration of HighLow Alarms are only available if the HighLow

Alarm option is purchased

48101 Alarm Status

The Alarm Status allows the user to independently turn each alarm ON or OFF

Field Setup

Menu

Output Filter Alarm Status Low Alarm

Alarm Options Alarm Value (On)

Factory Defaults Alarm Delay High Alarm

(On)

48102 Alarm Values

The Alarm Value Menu allows the user to enter the Low or the High flow alarm value Alarm

values will be displayed in the same engineering units selected in the Eng Units Menu (see

Section 483)

- High Alarm Function The High Alarm activates if the flow exceeds the High Alarm

value and resets when the flow drops below the High Alarm Value

- Low Alarm Function The Low Alarm activates if the flow drops below the Low

Alarm Value and resets when the flow exceeds the Low Alarm Value

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Value

Alarm Options Alarm Value (000000)

Factory Defaults Alarm Delay Hi Alarm Value

(100000)

48103 Alarm Delay

The Alarm Delay Menu allows the user to enter an alarm delay of 0 to 999 seconds before an

alarm will be activated The alarm will be reset without a delay

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Delay

Alarm Options Alarm Value (000)Seconds

Factory Defaults Alarm Delay Hi Alarm Delay

(000)Seconds

27

Factory Defaults 4811

If parameter configuration changes have been made incorrectly to the AAON Airflow Signal

Processor all device settings can be restored to the original AAON factory settings by selecting

YES and pressing Enter in both the Set To Factory Defaults Menu and the Verify Set To Factory

Defaults Menu (see Table 7 below for a list of Saved Settings)

Field Setup

Menu

Output Filter Set To Verify Set To

Alarm Options Factory Defaults Factory Defaults

Factory Defaults

(No) (No)

Table 7 - Factory Defaults

Item Saved Setting Item Saved Setting

1 All Factory Calibration Points (12) 14 MAC Address

2 Area Factor 15 Instance Number

3 Operating Range 16 Engineering Units

4 4 Pt Flow Correction 17 Display Filter Values

5 Altitude 18 Output Filter

6 K-Factor 19 DP Display Format

7 Lockdown amp Delay Values 20 Output Calibration

8 Flow Correction 21 AutoZero Status

9 Flow Coefficient 22 AutoZero Interval

10 Min amp Max Temp Range Values 23 Temp Units

11 Alarm Status 24 Temp Input

12 Alarm Values 25 Temp Fixed Value

13 Alarm Delay 26 Baud Rate

28

49 TECH CONFIGURATION MENUS

To set parameters under the Tech Configuration Menu refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 491

through 4911 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

Area Factor 491

To convert the differential pressure signal from the AAON Airflow Station to a flow value the

Area Factor associated with the AAON Airflow Station has been preprogramed by the factory

If the Area Factor needs to be checked or reconfigured the correct Area Factor for the AAON

Airflow Station can be found on the AAON Airflow Station product label installed in the air

handling unit

Tech Config

Password 1000

Area Factor Area Factor

Min Calibration (FT2)

Span Calibration

Altitude (001000)

29

If the Area Factor is reconfigured and the new Area Factor causes the existing Operating Range

Value to be outside the new calculated Minimum or Maximum Full Scale Value the below

Warning Message will appear and the Operating Range will be reset to the new Maximum Full

Scale Value by pressing Enter The display will automatically jump to the Operating Range

Menu allowing the user to enter a new Operating Range Value This can be accomplished by

performing the steps under Section 481 See Area Factor Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Area Factor

(FT )

(001000)

Area Factor

(FT )

Accepted

(001200)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Area

Factor and pressing

the Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Area Factor Example-

2

2

30

Minimum Calibration 492

The Minimum Calibration Menu allows a user to perform a minimum transducer calibration

This value will be placed in a different memory location and used until a Return to Factory

Defaults is selected (see Section 4811)

(Caution Before performing a minimum calibration disconnect the Total (High) and Static

(Low) Pressure connections perform a minimum calibration and then reconnect the Total

and Static Pressure connections)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00000) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Span Calibration 493

The Span Calibration Menu allows the user to perform a span transducer calibration to eliminate

any possible transducer drift This value will be placed in a different memory location than the

Factory Span memory location and used until a Return to Factory Defaults is selected (see

Section 4811)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00570) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Altitude 494

The Altitude Menu allows the user to enter the specific altitude for the job for the density

calculations the job specific site Altitude has been preprogramed by the factory

Tech Config

Password 1000

Area Factor Altitude

Min Calibration

Span Calibration (0000)Ft

Altitude

31

If the Altitude is changed from the factory setting and the new Altitude causes the existing

Operating Range Value to be outside the new calculated Minimum or Maximum Full Scale

Value the below Warning Message will appear and the Operating Range will be reset to the new

Maximum Full Scale Value by pressing Enter The display will automatically jump to the

Operating Range Menu allowing the user to enter a new Operating Range Value This can be

accomplished by performing the steps under Section 481 See Altitude Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Altitude

(0000)Ft

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Altitude

and pressing the Enter

button will calculate

new Min amp Max Op

Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Altitude Example-

Altitude

Accepted

(0100)Ft

32

Process Output Calibration 495

4951 Minimum Calibration

The Minimum Calibration Menu allows the user to make output zero adjustments Monitor the

output and with each Up or Down key depression the output will increase or decrease by

001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

4952 Span Calibration

The Span Calibration Menu allows the user to make output span adjustments Span adjustments

require a low pressure air source adjusted to the Full Scale Value shown on the side label

Monitor the output and with each Up or Down button depression the output will increase or

decrease by 001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

Probe Coefficient 496

The Probe Correction Coefficient Menu allows the user to modify the formula constant of

109670 used for non-amplified Pitot-type flow sensors

Tech Config

Password 1000

Output Calibration Correction Coeff

Correction Coeff Probe

4PT Flow Corr (109670)

MAC Address (00109670)

33

Four Point Flow Correction 497

The Four Point Flow Correction Menu allows the user to make corrections to the display and

output signal at 20 increments between 20 and 80 of the Operating Range Value entered

The Displayed Value is a fixed value determined by the percentage of Operating Range The

Measured Value is the value determined by an independent balancerrsquos reading

Tech Config

Password 1000

Output Calibration 80000 CFM Displayed Value

Correction Coeff 60000 CFM 80000

4PT Flow Corr 40000 CFM Measured Value

MAC Address 20000 CFM 79500

80000 CFM Displayed Value

60000 CFM 60000

40000 CFM Measured Value

20000 CFM 60500

80000 CFM Displayed Value

60000 CFM 40000

40000 CFM Measured Value

20000 CFM 40100

80000 CFM Displayed Value

60000 CFM 20000

40000 CFM Measured Value

20000 CFM 19500

MAC Address (BACnet Communication Option) 498

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network The default is 002 For

additional information refer to Section 411

Tech Config

Password 1000

Output Calibration MAC Address

Correction Coeff (Range = 02 to 254)

4PT Flow Corr

MAC Address (002)

34

Instance Number (BACnet Communication Option) 499

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The default is 1002 For

additional information refer to Section 411

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (Default = 1002)

Instance Number

Modbus ID (01002)

Modbus ID (Modbus Communication Option) 4910

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network The default is 002 For

communication with WattMaster Controls the Modbus ID has been set by the factory to 009 for

outside airflow applications For additional information refer to the Section 411

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

Baud Rate (BACnet amp Modbus Communication Options) 4911

The Baud Rate Menu allows the user to set a unique network baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate Modbus communications supports

96 192 384 576 and 1152 Kbps baud rate The default is 384 Kbps For communication

with WattMaster Controls the Baud Rate has been set by the factory to 96 Kbps For additional

information refer to Section 411

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

35

410 WARNING MESSAGES

Input Pressure Overrange Message 4101

If the input pressure exceeds the entered Operating Range Value the following message will

appear on the display It will alternate between the process display and the error message until

the input falls below the Operating Range Value

- Caution -

Input Beyond

Operating Range

Selected

Transducer Calibration Message 4102

If during a transducer zero or span calibration process the transducer output pressure value

measured exceeds plusmn20 of the expected value the following message will appear on the display

Once the Enter button is pressed the display returns to the previous calibration menu

Value entered is

Outside Factory

set limits

(Press Enter)

Operating Range Message 4103

If the new values entered for Temperature Compensation Area Factor or Altitude (see Sections

487 491 and 494) causes the Operating Range Value to exceed the new calculated

Maximum Full Scale Value the following message will appear on the display

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

New Operating Range Message 4104

If a user enters a new Operating Range Value the following message will appear on the display

notifying the user that if any 4 PT Flow Correction Values (see Section 497) were previously

entered they will be reset The message allows the user to confirm that the Operating Range

change should be made To complete the Operating Range change the user must use the

UPDown buttons to change the NO to a YES and press the ENTER button

Value will

Reset 4PT

Flow Correction

Values

Make the Change

(NO)

(Press Enter)

36

411 NETWORK COMMUNICATION

The AAON Airflow Signal Processor can be ordered with BACnet Modbus or LonWorks

Communication For BACnet Communication the AAON Airflow Signal Processors utilize

MSTP (Master SlaveToken Passing) BACnet type protocol BACnet is implemented using

EIA-485 signaling standards through a shielded twisted pair wire operating at a baud rate of 96

Kbps to 768 Kbps Each device has a unique MAC Address ranging from 2 to 127 Refer to

Section 4113 for BACnet Protocol Implementation Conformance Statements (PICS) For

Modbus Communication the AAON Airflow Signal Processors utilize the Modbus ndash RTU Slave

protocol using EIA-485 signaling standards through a shielded twisted pair wire operating at a

baud rate of 96 Kbps to 1152 Kbps Each device has a unique Modbus ID ranging from 1 to

254 Refer to Section 4114 for Modbus software configuration parameters For LonWorks

Communication each AAON Airflow Signal Processor has a unique Neuron Chip ID which is

loaded on the network by pressing a service switch located on the main board (see Section

4111 Figure 7) The LonWorks network utilizes a shielded twisted pair wire operating at a

fixed baud rate of 78 Kbps Refer to Section 4115 for LonWorks network variables

Sections 4111 and 4112 contain procedures for electrical connection of the AAON Airflow

Signal Processor to the network and for configuring the required communication parameters

Electrical Connection 4111

The following procedure outlines the steps for installing the interface wiring for network

communication Network wire should be low capacitance shielded 22 or 24 AWG twisted pair

with PVC jacket such as Belden Part numbers 9841 3105A or equivalent

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Verify that the Power Switch (S3) is in the OFF position and install the interface

wiring for Pins 9 and 10 as shown in Figure 7 If multiple AAON Airflow Signal

Processors will be connected to the same network see Figure 8 for connecting

multiple devices For network systems that require all devices to have a common

signal ground refer to Figure 9 for electrical connection The J2 electrical

connector has a removable terminal block for ease of installing the interface

wiring

Step 4 For proper operation of BACnet and Modbus communication networks the

device that is electrically installed at the end of the network may require the

Terminator Switch be moved to the ON position to prevent line and data

reflection If Terminator is required it must be applied to both physical ends of

the network All other devices should have the Terminator Switch in the OFF

position The communication board is located on the back side of the main

AAON Airflow Signal Processor board See Figure 10 below for Terminator

Switch location on the communication board

Step 5 For LonWorks Communication refer to Figure 7 for the location of the Lon

Service Pin

37

Step 6 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 7 Configure the required parameters as outlined in Section 4112

Step 8 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

RP1

S3

NETWORK

COMMUNICATION+

-

LON

SERVICE PIN

Figure 7 - Network Communication Electrical Connection

38

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

AAON AIRFLOW

SIGNAL PROCESSOR

CONNECT ONLY ONE END OF SHIELD

WIRE TO EARTH GROUND AS SHOWN

SET TERMINATOR SWITCH

ON IF REQUIRED

NETWORK

COMMUNICATIONS

NETWORK

CONNECT SHIELD

WIRES TOGETHER

CONNECT SHIELD

WIRES TOGETHER

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not

Requiring Common Signal Grounds

Note If using two conductor communication wire use the shield wire to connect all device signal grounds together as shown in the figure below If using three conductor communication wire use the 3rd conductor to connect all device signal grounds together and connect one side of the shield to earth ground

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

SIGNAL

GROUND

8

J2

SIGNAL

GROUND

8

J28

J2

USE SHIELD WIRE OR 3RD CONDUCTOR TO

CONNECT DEVICE SIGNAL GROUND TO

NETWORK SIGNAL GROUND

SET TERMINATOR SWITCH

ON IF REQUIRED

AAON AIRFLOW

SIGNAL PROCESSOR

NETWORK

COMMUNICATIONS

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

SIGNAL

GROUND

SIGNAL

GROUND

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds

39

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location

COMMUNICATION BOARD ID

BOARD SERIAL NO

40

Parameter Configuration 4112

If BACnet or Modbus communication is ordered the associated settings will need to be

configured with the exception of Modbus communication with WattMaster Controls which has

been configured at the factory To set the parameters refer to the following procedure below

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 41121

through 41124 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

41121 MAC Address (BACnet Communication Option)

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network Each AAON Airflow Signal

Processor must have a unique MAC Address assigned ranging from 2 to 127

Tech Config

Password 1000

4PT Flow Corr MAC Address

MAC Address (Range = 02 to 254)

Instance Number

Modbus ID (002)

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 10: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

10

+-

4-2

0m

A C

urre

nt L

oop

BACK SIDE OF COVER

RTD CONNECTION

Figure 2 - Temperature Transmitter Positive amp Negative Connectors

11

4 AIRFLOW SIGNAL PROCESSOR

41 SPECIFICATIONS

Power Supply 411

20 to 28 VACDC

Power Consumption 412

250mA at 24VAC

175mA at 24VDC

Accuracy 413

plusmn025 full scale

Temperature Input 414

4-20mA

Process Output Options 415

0-5VDC

0-10VDC

4-20mA (700Ω maximum load)

HighLow Alarm Relay Outputs 416

Two single (1 form C) dry contacts rated for

5 amps at 30VACDC

10 amps at 120VAC

42 SAFETY

Electrical Connections 421

Before any electrical connections are made ensure the POWER SWITCH is in the OFF

position

Static Electricity 422

The circuit board contains components which are susceptible to damage caused by static

electrical discharge Should it be necessary to remove the circuit board from the enclosure

appropriate precautions must first be taken to ensure that the operator and the circuit board are at

the same electrical potential

12

43 DIMENSIONS

100000ACFM

75 F

J1 J2

TOTALCONNECTION

STATICCONNECTION

462

5785

2265

350

525

Air Fl o wS IGN AL PROCES S OR

AAON

44 ELECTRICAL amp PNEUMATIC CONNECTIONS

All electrical and pneumatic connections to the AAON Airflow Signal Processor have been

made at the factory as shown in Figures 3 through 5 below with the exception of the electrical

connection for the HighLow Alarm Option if ordered and for network communication options

other than with WattMaster Controls The following procedure outlines the steps for turning

ON the AAON Airflow Signal Processor if network communication is required see Section

411 prior to turning ON the AAON Airflow Signal Processor

Caution ndash If electrical connections need to be rewired all electrical connections must be made

with the AAON Airflow Signal Processor Power Switch in the OFF position The three

electrical connectors (J1 J2 and optional J3) have removable terminal blocks for ease of

installing the interface wiring

13

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 4 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

(24VACDC)

POWER SUPPLY

ANALOG RECEIVING DEVICE

PROCESS OUTPUT

S1S2 S4

+

-

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

SWITCH POSITIONS

SHOWN IN BLACK

S1 POSITION

INDICATING 4-20mA

TEMPERATURE INPUT

S2 AND S4 POSITIONS

INDICATING 0-10VDC

PROCESS OUTPUT

RP1

S3

AAON

TEMPERATURE

TRANSMITTER

(4-20mA LOOP POWERED)+

-

Figure 3 - Electrical Connections

14

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROCOUTPUT

mA

V

10V

5V

(24VACDC)

POWER SUPPLY

ANALOG RECEIVING DEVICE

PROCESS OUTPUT

S1S2 S4

+

-

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

SWITCH POSITIONS

SHOWN IN BLACK

S1 POSITION

INDICATING 4-20mA

TEMPERATURE INPUT

S2 AND S4 POSITIONS

INDICATING 0-10VDC

PROCESS OUTPUT

RP1

S3

E-BUS DISTRIBUTION MODULE

+-

AAON

TEMPERATURE

TRANSMITTER

(4-20mA LOOP POWERED)+

-

- COMM

+ COMM

GND

THE SHIELDING WIRE SHOULD BE USED TO

CONNECT WATTMASTER GROUND TO AIRFLOW

SIGNAL PROCESSOR GROUND

Figure 4 - Electrical Connection with Wattmaster Controls

15

J1 J2

TOTAL

CONNECTION

STATIC

CONNECTION

TOTAL PRESSURE CONECTION

AAON AIRFLOW STATION

STATIC PRESSURE CONNECTION

AAON AIRFLOW STATION

Figure 5 - Pneumatic Connections

45 INPUTOUTPUT SET-UP

If input or output configuration changes are required refer to the Tables 1 and 2 in the sections

below and Figure 3 in Section 44

Process Output 451

If controls are provided by AAON the process output has been set by the factory for input to the

specific controller otherwise the default is 0-10VDC To change the output configuration set

the S2 amp S4 switches as follows

Table 1 - Process Output Switch Configuration

Process Output Range S2 S4

Current 4-20mA NA mA

Voltage 0-10VDC 10V V

Voltage 0-5VDC 5V V

Temperature Input 452

Since the AAON Temperature Transmitter has been provided the temperature input has been set

by the factory for 4-20mA To change the input configuration set the S1 switch as follows

Table 2 - Temperature Input Switch

Configuration

Temperature Input S1 Switch Selection

4-20mA mA

0-10VDC V

16

46 ACTIVE DISPLAYS amp KEY FUNCTIONS

Power-up Initiation Display 461

Upon initial power-up Software Revision information will be displayed on the graphic display

for approximately 5 seconds

EQ-1

Software Rev XXXXX

Modbus Rev XXXXX

Process Display Descriptions 462

After power-up initialization the following information will appear on the graphic display

depending upon the options purchased

75˚F

75˚F

75˚F

000000

000000

000000

AutoZero

ACFM

High Alarm

ACFM

Low Alarm

ACFM

Flow Monitoring with an

Auto Zero Cycle

Flow Monitoring with a

High Alarm Condition

Flow Monitoring with a

Low Alarm Condition

Table 3 - Process Display Descriptions

Number Description

1 Process value

2 Air Flow temperature units in degree F or C

3 Flashing Asterisk indicates the CPU is functioning

4 Engineering units

5 Displayed during an AutoZero cycle

6 Indicating High Alarm Value has been exceeded (HighLow Alarm Option)

7 Indicating Low Alarm Value has been exceeded (HighLow Alarm Option)

12 3

4

6

7 5

17

Key Functions 463

The following figure and description identify the function of each Key

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

2

13

4

567

8

RP1 9

Figure 6 - Key Functions

Table 4 - Key Functions

Number Description

1 Enter Key - Allows a user to enter into the Field Menu enter into a selected menu item

or store into memory changes made to the program

2 Up Key - Allows the user to scroll up in the menu list to a selected item or increase digits

when making value changes

3 Right Key - When making changes to user values the Right Key allows the user to scroll

to the correct digit for changes

4 Down Key - Allows the user to scroll down in the menu list to a selected item or

decrease digits when making value changes

5 Left Key - When making changes to user values the Left Key allows the user to scroll to

the correct digit for changes

6

Escape Key - The Escape Key allows the user to back out of the menu to the Active

Display If a user starts to make a change and decides to cancel the change the Escape

Key will allow the user to return to the Active Display without making the change

7 Power Switch ndash Allows a user to turn power off to the AAON Signal Processor during

field wiring or modifications to the device

8 Lon Switch ndash Allows a user to send a unique Neuron device ID when connecting to a

LonWorks communication network

9 RP1 ndash Allows a user to adjust the display contrast

18

47 DISPLAY MENUS

Table 5 shows the Field Setup and Tech Configuration Menus The display will vary depending

upon the options purchased

Table 5 - Display Menus

Field Setup Menu

(Press ENTER Key)

Tech Configuration Menu

(Press UPDOWN Keys simultaneously)

(Enter Password number 1000)

(Press ENTER Key)

Operating Range Area Factor

Zero Calibration Min Calibration

Eng Units Span Calibration

Lockdown Temp Fixed Value

Flow Correction Altitude

AutoZero Output Calibration

Temp Comp Correction Coeff

Display Filter 4PT Flow Corr

Output Filter MAC Address (Optional)

Alarm Options (Optional) Instance Number (Optional)

Factory Defaults Modbus ID (Optional)

Baud Rate (Optional)

48 FIELD SETUP MENUS

To set parameters under the Field Setup Menus refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Field Setup Menu by depressing and holding the Enter Key for 5

seconds

Step 2 Once in the Field Setup Menu use the UpDown Keys to highlight the

required parameter for configuration as shown in Sections 481 through

4811 Press the Enter Key once to access the highlighted parameter

Menu

Step 3 Once in the parameter menu the parameter can be changed using

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Field

Setup Menu

Step 4 After all of the required parameters have been configured exit the Field

Setup Menu by pressing the ESC Key The Process Display (see Section

462) will then be displayed

19

Operating Range 481

The Operating Range allows the user to enter a value which will represent 100 of the process

output signal (5VDC 10VDC or 20mA) The Operating Range Value has been set by the

factory to equal 110 of the design supply flow rate unless this value is less than the Minimum

Full Scale Value allowed for the AAON Airflow Signal Processor The menu will display the

Minimum Full Scale Value allowed which is then entered as the Operating Range

Field Setup

Menu

Operating Range Operating Range

Zero Calibration ( ACFM )

Engineering Units (6000-12000)

Lockdown (010000)

Zero Pressure Calibration 482

The Zero Calibration Menu allows the user to perform a zero transducer calibration to eliminate

any transducer zero shift

(Caution Before performing a zero calibration disconnect the Total (High) and Static (Low)

pressure connections perform a zero calibration and then reconnect the Total and Static

pressure connections)

Field Setup

Menu

Operating Range Input Value CPU Taking

Zero Calibration (0000) Inch wc Samples

Engineering Units

Lockdown (Press Enter) (Please Wait)

Engineering Units 483

Table 6 lists the engineering units that are available for the user to select from for display

purposes Changing the engineering units will affect the process display and the alarm value

menus The default setting is ACFM

Field Setup

Menu

Operating Range Eng Units

Zero Calibration

Engineering Units (ACFM)

Lockdown

20

Table 6 - Engineering Units

Standard

Flow

Units

Actual

Flow

Units

SCFM ACFM

SCFH LS

SLS Am3S

Sm3S Am3M

Sm3M Am3HR

Sm3HR

Lockdown 484

Due to the high square root gain associated with very low delta p values the display and process

output are locked to a zero value until the input value reaches the specified Lockdown Value that

was entered Above the Lockdown Value the output is linear to air flow

4841 Lockdown Value

The Lockdown Value can be changed from 0 to 20 of Operating Range Value Lockdown

Values can be changed in 1 increments The recommended standard is 5

Field Setup

Menu

Operating Range Lockdown (0-20)

Zero Calibration (5)

Engineering Units Delay (0-20 sec)

Lockdown (2) Sec

4842 Lockdown Delay

The Lockdown Delay Menu allows the user to enter a lockdown time delay (0-20 seconds) that

will delay the display and output lockdown from occurring until the flow value or output value

has remained below the lockdown value for that duration

Field Setup

Menu

Operating Range Lockdown (0-20)

Zero Calibration (5)

Engineering Units Delay (0-20 sec)

Lockdown (2) Sec

21

Flow Correction 485

The Flow Correction Menu was incorporated into the AAON Airflow Signal Processor to give

the user an easy way to make corrections to the display and output without changing the

Operating Range Value entered by the factory or user The Flow Correction Menu would be

used to correct for a constant error from zero to the entered Operating Range Value

4851 Flow Correction (K-Factor)

If the user knows the change required to match the balancers reading select the K-Factor

Menu and enter this value for the K-Factor The minimum and maximum allowable K-Factor

Value is displayed in the K-Factor Menu

Field Setup

Menu

Flow Correction Flow Correction

AutoZero K-Factor K-Factor Range

Temp Comp (085 13)

Display Filter K-Factor Calc K=(01000)

4852 Flow Correction (K-Factor Calculator)

If the new K-factor Value needs to be calculated select the K-Factor Calc Menu Enter the

Displayed Value on the AAON Airflow Signal Processor and actual Measured Value press

Enter and the change will be calculated and stored as the new K-Factor Value

Field Setup

Menu

Flow Correction Displayed Value

AutoZero K-Factor (000000)

Temp Comp Measured Value

Display Filter K-Factor Calc (000000)

-FLOW CORRECTION EXAMPLE-

The balancer is consistently measuring a value of 9500 CFM which is 500 CFM less than the

10000 CFM value on the AAON Airflow Signal Processor display The user would then

perform the following math function Measured Value Displayed Value = K-Factor so 9500

CFM 10000 CFM = 0950 The user would enter 0950 for the K-Factor Flow Correction If

the K-Factor Calculator is used the K- Factor Flow Correction would automatically update the K

Factor

AutoZero 486

The AutoZero feature corrects any zero offset caused by large ambient temperature changes

22

4861 AutoZero Status

The AutoZero Status Menu allows the user to turn the AutoZero function ON or OFF

Field Setup

Menu

Flow Correction AZ Status AZ Status

AutoZero AZ Interval (ONOFF)

Temp Comp AZ Test Interval

Display Filter (ON)

4862 AutoZero Interval

The AutoZero Interval Menu allows the user to select the AutoZero Interval from once an hour

to once a day in 1 hour increments Use the UPDOWN keys to select the interval value Upon

device power up an AutoZero cycle will occur after 20 seconds

Field Setup

Menu

Flow Correction AZ Status AZ Interval

AutoZero AZ Interval (1 TO 24HR)

Temp Comp AZ Test Interval

Display Filter (01)HR

4863 AutoZero Test Interval

For troubleshooting or testing the AutoZero function the AutoZero Test Interval Menu allows

the user to select an Auto Zero test frequency of once a minute to once every 30 minutes in 1

minute increments Use the UPDOWN keys to select the interval value If AutoZero Test

Interval is turned ON for more than 60 minutes it will automatically default to OFF and the

AutoZero Interval (see Section 4862) will be reactivated

Field Setup

Menu

Flow Correction AZ Status AZ Test Interval

AutoZero AZ Interval (OFF)

Temp Comp AZ Test Interval Interval

Display Filter (1)Min

Temperature Compensation 487

The Temperature Compensation option compensates the flow and velocity signal for density

changes caused by variations in the process air temperature An input signal from AAON

Temperature Transmitter is required see Section 33 for proper temperature transmitter

connection and Section 452 for temperature input signal configuration

23

4871 Temperature Units

The Temperature Units Menu allows the user to select the appropriate temperature units for the

job The default setting is ordmF

Field Setup

Menu

Flow Correction Temperature Units Units

AutoZero Temperature Values (ordmF ordmC)

Temp Comp Temperature Input

Display Filter Fixed Value (ordmF)

4872 Temperature Values

The Temperature Values Menu allows the factory or user to set the minimum and maximum

temperature range values that represent the input signal from the external temperature transmitter

or the building automation system Since the AAON Temperature Transmitter has been supplied

the minimum and maximum temperature range values of -30degF to 130degF have been

preprogramed

Field Setup

Menu

Flow Correction Temperature Units Minimum Value

AutoZero Temperature Values (-030)

Temp Comp Temperature Input Maximum Value

Display Filter Fixed Value (130)

If the temperature values are changed from the factory settings and the new temperature values

cause the existing Operating Range Value to be outside the new calculated Minimum or

Maximum Full Scale Value the below Warning Message will appear and the Operating Range

will be reset to the new Maximum Full Scale Value by pressing Enter The display will

automatically jump to the Operating Range Menu allowing the user to enter a new Operating

Range Value This can be accomplished by performing the steps under Section 481 See

Temperature Range Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

24

Minimum Value

(-000)

Maximum Value

(000)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Min amp

Max Temperature

value and pressing the

Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Temperature Range Example-

Minimum Value

(-000)

Accepted

(100)

4873 Temperature Input

The Temperature Input Menu allows the user to select between three temperature input options

(Fixed Variable and Network) for the flow calculations Since the AAON Temperature

Transmitter has been supplied Variable has been selected If Fixed is selected the default

temperature value entered in the Fixed Value Menu (see Section 4874) is used If Net is

selected the temperature input signal is obtained through network communications The Net

option is only available if one of the communication options is ordered The temperature value

is only displayed on the LCD screen if the Temperature Input is set to Variable or Network

Field Setup

Menu

Flow Correction Temperature Units Temp Input

AutoZero Temperature Values (FixVarNet)

Temp Comp Temperature Input

Display Filter Fixed Value (Variable)

25

4874 Fixed Value

The Fixed Value Menu allows the user to enter a temperature value for the flow calculations

This value will not be displayed on the LCD screen

Field Setup

Menu

Flow Correction Temperature Units Fixed Value

AutoZero Temperature Values (˚F)

Temp Comp Temperature Input

Display Filter Fixed Value (+068)

Display Filter 488

The Display Filter Menu allows the user to adjust the Display Filter rolling average algorithm by

setting the Sample Interval Time value in seconds and the number of rolling average Sample

Counts The adjustment range of the Sample Interval Time is 010 to 655 seconds in 010

increments The Sample Count range is 0 to 150 Sample Counts The Display Filter is

independent of the Process Output Filter Value (See Section 489)

Field Setup

Menu

Flow Correction Sample Interval Time

AutoZero (005)sec

Temp Comp (0-150) Sample Count

Display Filter (010)

Process Output Filter 489

The Process Output Filter Menu allows the user to adjust the Process Output Filters rolling

average algorithm by setting the Sample Interval Time value in seconds and the number of

rolling average Sample Counts The adjustment range of the Sample Interval Time is 010 to

655 seconds in 010 increments The Sample Count range is 0 to 150 Sample Counts The

Process Output Filter is independent of the Display Filter Value (See Section 488)

Field Setup

Menu

Output Filter Sample Interval Time

Alarm Options (005)sec

Factory Defaults (0-150) Sample Count

(010)

26

HighLow Alarm Option 4810

The following menus for configuration of HighLow Alarms are only available if the HighLow

Alarm option is purchased

48101 Alarm Status

The Alarm Status allows the user to independently turn each alarm ON or OFF

Field Setup

Menu

Output Filter Alarm Status Low Alarm

Alarm Options Alarm Value (On)

Factory Defaults Alarm Delay High Alarm

(On)

48102 Alarm Values

The Alarm Value Menu allows the user to enter the Low or the High flow alarm value Alarm

values will be displayed in the same engineering units selected in the Eng Units Menu (see

Section 483)

- High Alarm Function The High Alarm activates if the flow exceeds the High Alarm

value and resets when the flow drops below the High Alarm Value

- Low Alarm Function The Low Alarm activates if the flow drops below the Low

Alarm Value and resets when the flow exceeds the Low Alarm Value

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Value

Alarm Options Alarm Value (000000)

Factory Defaults Alarm Delay Hi Alarm Value

(100000)

48103 Alarm Delay

The Alarm Delay Menu allows the user to enter an alarm delay of 0 to 999 seconds before an

alarm will be activated The alarm will be reset without a delay

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Delay

Alarm Options Alarm Value (000)Seconds

Factory Defaults Alarm Delay Hi Alarm Delay

(000)Seconds

27

Factory Defaults 4811

If parameter configuration changes have been made incorrectly to the AAON Airflow Signal

Processor all device settings can be restored to the original AAON factory settings by selecting

YES and pressing Enter in both the Set To Factory Defaults Menu and the Verify Set To Factory

Defaults Menu (see Table 7 below for a list of Saved Settings)

Field Setup

Menu

Output Filter Set To Verify Set To

Alarm Options Factory Defaults Factory Defaults

Factory Defaults

(No) (No)

Table 7 - Factory Defaults

Item Saved Setting Item Saved Setting

1 All Factory Calibration Points (12) 14 MAC Address

2 Area Factor 15 Instance Number

3 Operating Range 16 Engineering Units

4 4 Pt Flow Correction 17 Display Filter Values

5 Altitude 18 Output Filter

6 K-Factor 19 DP Display Format

7 Lockdown amp Delay Values 20 Output Calibration

8 Flow Correction 21 AutoZero Status

9 Flow Coefficient 22 AutoZero Interval

10 Min amp Max Temp Range Values 23 Temp Units

11 Alarm Status 24 Temp Input

12 Alarm Values 25 Temp Fixed Value

13 Alarm Delay 26 Baud Rate

28

49 TECH CONFIGURATION MENUS

To set parameters under the Tech Configuration Menu refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 491

through 4911 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

Area Factor 491

To convert the differential pressure signal from the AAON Airflow Station to a flow value the

Area Factor associated with the AAON Airflow Station has been preprogramed by the factory

If the Area Factor needs to be checked or reconfigured the correct Area Factor for the AAON

Airflow Station can be found on the AAON Airflow Station product label installed in the air

handling unit

Tech Config

Password 1000

Area Factor Area Factor

Min Calibration (FT2)

Span Calibration

Altitude (001000)

29

If the Area Factor is reconfigured and the new Area Factor causes the existing Operating Range

Value to be outside the new calculated Minimum or Maximum Full Scale Value the below

Warning Message will appear and the Operating Range will be reset to the new Maximum Full

Scale Value by pressing Enter The display will automatically jump to the Operating Range

Menu allowing the user to enter a new Operating Range Value This can be accomplished by

performing the steps under Section 481 See Area Factor Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Area Factor

(FT )

(001000)

Area Factor

(FT )

Accepted

(001200)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Area

Factor and pressing

the Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Area Factor Example-

2

2

30

Minimum Calibration 492

The Minimum Calibration Menu allows a user to perform a minimum transducer calibration

This value will be placed in a different memory location and used until a Return to Factory

Defaults is selected (see Section 4811)

(Caution Before performing a minimum calibration disconnect the Total (High) and Static

(Low) Pressure connections perform a minimum calibration and then reconnect the Total

and Static Pressure connections)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00000) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Span Calibration 493

The Span Calibration Menu allows the user to perform a span transducer calibration to eliminate

any possible transducer drift This value will be placed in a different memory location than the

Factory Span memory location and used until a Return to Factory Defaults is selected (see

Section 4811)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00570) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Altitude 494

The Altitude Menu allows the user to enter the specific altitude for the job for the density

calculations the job specific site Altitude has been preprogramed by the factory

Tech Config

Password 1000

Area Factor Altitude

Min Calibration

Span Calibration (0000)Ft

Altitude

31

If the Altitude is changed from the factory setting and the new Altitude causes the existing

Operating Range Value to be outside the new calculated Minimum or Maximum Full Scale

Value the below Warning Message will appear and the Operating Range will be reset to the new

Maximum Full Scale Value by pressing Enter The display will automatically jump to the

Operating Range Menu allowing the user to enter a new Operating Range Value This can be

accomplished by performing the steps under Section 481 See Altitude Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Altitude

(0000)Ft

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Altitude

and pressing the Enter

button will calculate

new Min amp Max Op

Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Altitude Example-

Altitude

Accepted

(0100)Ft

32

Process Output Calibration 495

4951 Minimum Calibration

The Minimum Calibration Menu allows the user to make output zero adjustments Monitor the

output and with each Up or Down key depression the output will increase or decrease by

001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

4952 Span Calibration

The Span Calibration Menu allows the user to make output span adjustments Span adjustments

require a low pressure air source adjusted to the Full Scale Value shown on the side label

Monitor the output and with each Up or Down button depression the output will increase or

decrease by 001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

Probe Coefficient 496

The Probe Correction Coefficient Menu allows the user to modify the formula constant of

109670 used for non-amplified Pitot-type flow sensors

Tech Config

Password 1000

Output Calibration Correction Coeff

Correction Coeff Probe

4PT Flow Corr (109670)

MAC Address (00109670)

33

Four Point Flow Correction 497

The Four Point Flow Correction Menu allows the user to make corrections to the display and

output signal at 20 increments between 20 and 80 of the Operating Range Value entered

The Displayed Value is a fixed value determined by the percentage of Operating Range The

Measured Value is the value determined by an independent balancerrsquos reading

Tech Config

Password 1000

Output Calibration 80000 CFM Displayed Value

Correction Coeff 60000 CFM 80000

4PT Flow Corr 40000 CFM Measured Value

MAC Address 20000 CFM 79500

80000 CFM Displayed Value

60000 CFM 60000

40000 CFM Measured Value

20000 CFM 60500

80000 CFM Displayed Value

60000 CFM 40000

40000 CFM Measured Value

20000 CFM 40100

80000 CFM Displayed Value

60000 CFM 20000

40000 CFM Measured Value

20000 CFM 19500

MAC Address (BACnet Communication Option) 498

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network The default is 002 For

additional information refer to Section 411

Tech Config

Password 1000

Output Calibration MAC Address

Correction Coeff (Range = 02 to 254)

4PT Flow Corr

MAC Address (002)

34

Instance Number (BACnet Communication Option) 499

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The default is 1002 For

additional information refer to Section 411

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (Default = 1002)

Instance Number

Modbus ID (01002)

Modbus ID (Modbus Communication Option) 4910

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network The default is 002 For

communication with WattMaster Controls the Modbus ID has been set by the factory to 009 for

outside airflow applications For additional information refer to the Section 411

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

Baud Rate (BACnet amp Modbus Communication Options) 4911

The Baud Rate Menu allows the user to set a unique network baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate Modbus communications supports

96 192 384 576 and 1152 Kbps baud rate The default is 384 Kbps For communication

with WattMaster Controls the Baud Rate has been set by the factory to 96 Kbps For additional

information refer to Section 411

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

35

410 WARNING MESSAGES

Input Pressure Overrange Message 4101

If the input pressure exceeds the entered Operating Range Value the following message will

appear on the display It will alternate between the process display and the error message until

the input falls below the Operating Range Value

- Caution -

Input Beyond

Operating Range

Selected

Transducer Calibration Message 4102

If during a transducer zero or span calibration process the transducer output pressure value

measured exceeds plusmn20 of the expected value the following message will appear on the display

Once the Enter button is pressed the display returns to the previous calibration menu

Value entered is

Outside Factory

set limits

(Press Enter)

Operating Range Message 4103

If the new values entered for Temperature Compensation Area Factor or Altitude (see Sections

487 491 and 494) causes the Operating Range Value to exceed the new calculated

Maximum Full Scale Value the following message will appear on the display

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

New Operating Range Message 4104

If a user enters a new Operating Range Value the following message will appear on the display

notifying the user that if any 4 PT Flow Correction Values (see Section 497) were previously

entered they will be reset The message allows the user to confirm that the Operating Range

change should be made To complete the Operating Range change the user must use the

UPDown buttons to change the NO to a YES and press the ENTER button

Value will

Reset 4PT

Flow Correction

Values

Make the Change

(NO)

(Press Enter)

36

411 NETWORK COMMUNICATION

The AAON Airflow Signal Processor can be ordered with BACnet Modbus or LonWorks

Communication For BACnet Communication the AAON Airflow Signal Processors utilize

MSTP (Master SlaveToken Passing) BACnet type protocol BACnet is implemented using

EIA-485 signaling standards through a shielded twisted pair wire operating at a baud rate of 96

Kbps to 768 Kbps Each device has a unique MAC Address ranging from 2 to 127 Refer to

Section 4113 for BACnet Protocol Implementation Conformance Statements (PICS) For

Modbus Communication the AAON Airflow Signal Processors utilize the Modbus ndash RTU Slave

protocol using EIA-485 signaling standards through a shielded twisted pair wire operating at a

baud rate of 96 Kbps to 1152 Kbps Each device has a unique Modbus ID ranging from 1 to

254 Refer to Section 4114 for Modbus software configuration parameters For LonWorks

Communication each AAON Airflow Signal Processor has a unique Neuron Chip ID which is

loaded on the network by pressing a service switch located on the main board (see Section

4111 Figure 7) The LonWorks network utilizes a shielded twisted pair wire operating at a

fixed baud rate of 78 Kbps Refer to Section 4115 for LonWorks network variables

Sections 4111 and 4112 contain procedures for electrical connection of the AAON Airflow

Signal Processor to the network and for configuring the required communication parameters

Electrical Connection 4111

The following procedure outlines the steps for installing the interface wiring for network

communication Network wire should be low capacitance shielded 22 or 24 AWG twisted pair

with PVC jacket such as Belden Part numbers 9841 3105A or equivalent

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Verify that the Power Switch (S3) is in the OFF position and install the interface

wiring for Pins 9 and 10 as shown in Figure 7 If multiple AAON Airflow Signal

Processors will be connected to the same network see Figure 8 for connecting

multiple devices For network systems that require all devices to have a common

signal ground refer to Figure 9 for electrical connection The J2 electrical

connector has a removable terminal block for ease of installing the interface

wiring

Step 4 For proper operation of BACnet and Modbus communication networks the

device that is electrically installed at the end of the network may require the

Terminator Switch be moved to the ON position to prevent line and data

reflection If Terminator is required it must be applied to both physical ends of

the network All other devices should have the Terminator Switch in the OFF

position The communication board is located on the back side of the main

AAON Airflow Signal Processor board See Figure 10 below for Terminator

Switch location on the communication board

Step 5 For LonWorks Communication refer to Figure 7 for the location of the Lon

Service Pin

37

Step 6 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 7 Configure the required parameters as outlined in Section 4112

Step 8 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

RP1

S3

NETWORK

COMMUNICATION+

-

LON

SERVICE PIN

Figure 7 - Network Communication Electrical Connection

38

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

AAON AIRFLOW

SIGNAL PROCESSOR

CONNECT ONLY ONE END OF SHIELD

WIRE TO EARTH GROUND AS SHOWN

SET TERMINATOR SWITCH

ON IF REQUIRED

NETWORK

COMMUNICATIONS

NETWORK

CONNECT SHIELD

WIRES TOGETHER

CONNECT SHIELD

WIRES TOGETHER

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not

Requiring Common Signal Grounds

Note If using two conductor communication wire use the shield wire to connect all device signal grounds together as shown in the figure below If using three conductor communication wire use the 3rd conductor to connect all device signal grounds together and connect one side of the shield to earth ground

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

SIGNAL

GROUND

8

J2

SIGNAL

GROUND

8

J28

J2

USE SHIELD WIRE OR 3RD CONDUCTOR TO

CONNECT DEVICE SIGNAL GROUND TO

NETWORK SIGNAL GROUND

SET TERMINATOR SWITCH

ON IF REQUIRED

AAON AIRFLOW

SIGNAL PROCESSOR

NETWORK

COMMUNICATIONS

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

SIGNAL

GROUND

SIGNAL

GROUND

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds

39

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location

COMMUNICATION BOARD ID

BOARD SERIAL NO

40

Parameter Configuration 4112

If BACnet or Modbus communication is ordered the associated settings will need to be

configured with the exception of Modbus communication with WattMaster Controls which has

been configured at the factory To set the parameters refer to the following procedure below

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 41121

through 41124 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

41121 MAC Address (BACnet Communication Option)

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network Each AAON Airflow Signal

Processor must have a unique MAC Address assigned ranging from 2 to 127

Tech Config

Password 1000

4PT Flow Corr MAC Address

MAC Address (Range = 02 to 254)

Instance Number

Modbus ID (002)

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 11: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

11

4 AIRFLOW SIGNAL PROCESSOR

41 SPECIFICATIONS

Power Supply 411

20 to 28 VACDC

Power Consumption 412

250mA at 24VAC

175mA at 24VDC

Accuracy 413

plusmn025 full scale

Temperature Input 414

4-20mA

Process Output Options 415

0-5VDC

0-10VDC

4-20mA (700Ω maximum load)

HighLow Alarm Relay Outputs 416

Two single (1 form C) dry contacts rated for

5 amps at 30VACDC

10 amps at 120VAC

42 SAFETY

Electrical Connections 421

Before any electrical connections are made ensure the POWER SWITCH is in the OFF

position

Static Electricity 422

The circuit board contains components which are susceptible to damage caused by static

electrical discharge Should it be necessary to remove the circuit board from the enclosure

appropriate precautions must first be taken to ensure that the operator and the circuit board are at

the same electrical potential

12

43 DIMENSIONS

100000ACFM

75 F

J1 J2

TOTALCONNECTION

STATICCONNECTION

462

5785

2265

350

525

Air Fl o wS IGN AL PROCES S OR

AAON

44 ELECTRICAL amp PNEUMATIC CONNECTIONS

All electrical and pneumatic connections to the AAON Airflow Signal Processor have been

made at the factory as shown in Figures 3 through 5 below with the exception of the electrical

connection for the HighLow Alarm Option if ordered and for network communication options

other than with WattMaster Controls The following procedure outlines the steps for turning

ON the AAON Airflow Signal Processor if network communication is required see Section

411 prior to turning ON the AAON Airflow Signal Processor

Caution ndash If electrical connections need to be rewired all electrical connections must be made

with the AAON Airflow Signal Processor Power Switch in the OFF position The three

electrical connectors (J1 J2 and optional J3) have removable terminal blocks for ease of

installing the interface wiring

13

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 4 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

(24VACDC)

POWER SUPPLY

ANALOG RECEIVING DEVICE

PROCESS OUTPUT

S1S2 S4

+

-

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

SWITCH POSITIONS

SHOWN IN BLACK

S1 POSITION

INDICATING 4-20mA

TEMPERATURE INPUT

S2 AND S4 POSITIONS

INDICATING 0-10VDC

PROCESS OUTPUT

RP1

S3

AAON

TEMPERATURE

TRANSMITTER

(4-20mA LOOP POWERED)+

-

Figure 3 - Electrical Connections

14

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROCOUTPUT

mA

V

10V

5V

(24VACDC)

POWER SUPPLY

ANALOG RECEIVING DEVICE

PROCESS OUTPUT

S1S2 S4

+

-

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

SWITCH POSITIONS

SHOWN IN BLACK

S1 POSITION

INDICATING 4-20mA

TEMPERATURE INPUT

S2 AND S4 POSITIONS

INDICATING 0-10VDC

PROCESS OUTPUT

RP1

S3

E-BUS DISTRIBUTION MODULE

+-

AAON

TEMPERATURE

TRANSMITTER

(4-20mA LOOP POWERED)+

-

- COMM

+ COMM

GND

THE SHIELDING WIRE SHOULD BE USED TO

CONNECT WATTMASTER GROUND TO AIRFLOW

SIGNAL PROCESSOR GROUND

Figure 4 - Electrical Connection with Wattmaster Controls

15

J1 J2

TOTAL

CONNECTION

STATIC

CONNECTION

TOTAL PRESSURE CONECTION

AAON AIRFLOW STATION

STATIC PRESSURE CONNECTION

AAON AIRFLOW STATION

Figure 5 - Pneumatic Connections

45 INPUTOUTPUT SET-UP

If input or output configuration changes are required refer to the Tables 1 and 2 in the sections

below and Figure 3 in Section 44

Process Output 451

If controls are provided by AAON the process output has been set by the factory for input to the

specific controller otherwise the default is 0-10VDC To change the output configuration set

the S2 amp S4 switches as follows

Table 1 - Process Output Switch Configuration

Process Output Range S2 S4

Current 4-20mA NA mA

Voltage 0-10VDC 10V V

Voltage 0-5VDC 5V V

Temperature Input 452

Since the AAON Temperature Transmitter has been provided the temperature input has been set

by the factory for 4-20mA To change the input configuration set the S1 switch as follows

Table 2 - Temperature Input Switch

Configuration

Temperature Input S1 Switch Selection

4-20mA mA

0-10VDC V

16

46 ACTIVE DISPLAYS amp KEY FUNCTIONS

Power-up Initiation Display 461

Upon initial power-up Software Revision information will be displayed on the graphic display

for approximately 5 seconds

EQ-1

Software Rev XXXXX

Modbus Rev XXXXX

Process Display Descriptions 462

After power-up initialization the following information will appear on the graphic display

depending upon the options purchased

75˚F

75˚F

75˚F

000000

000000

000000

AutoZero

ACFM

High Alarm

ACFM

Low Alarm

ACFM

Flow Monitoring with an

Auto Zero Cycle

Flow Monitoring with a

High Alarm Condition

Flow Monitoring with a

Low Alarm Condition

Table 3 - Process Display Descriptions

Number Description

1 Process value

2 Air Flow temperature units in degree F or C

3 Flashing Asterisk indicates the CPU is functioning

4 Engineering units

5 Displayed during an AutoZero cycle

6 Indicating High Alarm Value has been exceeded (HighLow Alarm Option)

7 Indicating Low Alarm Value has been exceeded (HighLow Alarm Option)

12 3

4

6

7 5

17

Key Functions 463

The following figure and description identify the function of each Key

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

2

13

4

567

8

RP1 9

Figure 6 - Key Functions

Table 4 - Key Functions

Number Description

1 Enter Key - Allows a user to enter into the Field Menu enter into a selected menu item

or store into memory changes made to the program

2 Up Key - Allows the user to scroll up in the menu list to a selected item or increase digits

when making value changes

3 Right Key - When making changes to user values the Right Key allows the user to scroll

to the correct digit for changes

4 Down Key - Allows the user to scroll down in the menu list to a selected item or

decrease digits when making value changes

5 Left Key - When making changes to user values the Left Key allows the user to scroll to

the correct digit for changes

6

Escape Key - The Escape Key allows the user to back out of the menu to the Active

Display If a user starts to make a change and decides to cancel the change the Escape

Key will allow the user to return to the Active Display without making the change

7 Power Switch ndash Allows a user to turn power off to the AAON Signal Processor during

field wiring or modifications to the device

8 Lon Switch ndash Allows a user to send a unique Neuron device ID when connecting to a

LonWorks communication network

9 RP1 ndash Allows a user to adjust the display contrast

18

47 DISPLAY MENUS

Table 5 shows the Field Setup and Tech Configuration Menus The display will vary depending

upon the options purchased

Table 5 - Display Menus

Field Setup Menu

(Press ENTER Key)

Tech Configuration Menu

(Press UPDOWN Keys simultaneously)

(Enter Password number 1000)

(Press ENTER Key)

Operating Range Area Factor

Zero Calibration Min Calibration

Eng Units Span Calibration

Lockdown Temp Fixed Value

Flow Correction Altitude

AutoZero Output Calibration

Temp Comp Correction Coeff

Display Filter 4PT Flow Corr

Output Filter MAC Address (Optional)

Alarm Options (Optional) Instance Number (Optional)

Factory Defaults Modbus ID (Optional)

Baud Rate (Optional)

48 FIELD SETUP MENUS

To set parameters under the Field Setup Menus refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Field Setup Menu by depressing and holding the Enter Key for 5

seconds

Step 2 Once in the Field Setup Menu use the UpDown Keys to highlight the

required parameter for configuration as shown in Sections 481 through

4811 Press the Enter Key once to access the highlighted parameter

Menu

Step 3 Once in the parameter menu the parameter can be changed using

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Field

Setup Menu

Step 4 After all of the required parameters have been configured exit the Field

Setup Menu by pressing the ESC Key The Process Display (see Section

462) will then be displayed

19

Operating Range 481

The Operating Range allows the user to enter a value which will represent 100 of the process

output signal (5VDC 10VDC or 20mA) The Operating Range Value has been set by the

factory to equal 110 of the design supply flow rate unless this value is less than the Minimum

Full Scale Value allowed for the AAON Airflow Signal Processor The menu will display the

Minimum Full Scale Value allowed which is then entered as the Operating Range

Field Setup

Menu

Operating Range Operating Range

Zero Calibration ( ACFM )

Engineering Units (6000-12000)

Lockdown (010000)

Zero Pressure Calibration 482

The Zero Calibration Menu allows the user to perform a zero transducer calibration to eliminate

any transducer zero shift

(Caution Before performing a zero calibration disconnect the Total (High) and Static (Low)

pressure connections perform a zero calibration and then reconnect the Total and Static

pressure connections)

Field Setup

Menu

Operating Range Input Value CPU Taking

Zero Calibration (0000) Inch wc Samples

Engineering Units

Lockdown (Press Enter) (Please Wait)

Engineering Units 483

Table 6 lists the engineering units that are available for the user to select from for display

purposes Changing the engineering units will affect the process display and the alarm value

menus The default setting is ACFM

Field Setup

Menu

Operating Range Eng Units

Zero Calibration

Engineering Units (ACFM)

Lockdown

20

Table 6 - Engineering Units

Standard

Flow

Units

Actual

Flow

Units

SCFM ACFM

SCFH LS

SLS Am3S

Sm3S Am3M

Sm3M Am3HR

Sm3HR

Lockdown 484

Due to the high square root gain associated with very low delta p values the display and process

output are locked to a zero value until the input value reaches the specified Lockdown Value that

was entered Above the Lockdown Value the output is linear to air flow

4841 Lockdown Value

The Lockdown Value can be changed from 0 to 20 of Operating Range Value Lockdown

Values can be changed in 1 increments The recommended standard is 5

Field Setup

Menu

Operating Range Lockdown (0-20)

Zero Calibration (5)

Engineering Units Delay (0-20 sec)

Lockdown (2) Sec

4842 Lockdown Delay

The Lockdown Delay Menu allows the user to enter a lockdown time delay (0-20 seconds) that

will delay the display and output lockdown from occurring until the flow value or output value

has remained below the lockdown value for that duration

Field Setup

Menu

Operating Range Lockdown (0-20)

Zero Calibration (5)

Engineering Units Delay (0-20 sec)

Lockdown (2) Sec

21

Flow Correction 485

The Flow Correction Menu was incorporated into the AAON Airflow Signal Processor to give

the user an easy way to make corrections to the display and output without changing the

Operating Range Value entered by the factory or user The Flow Correction Menu would be

used to correct for a constant error from zero to the entered Operating Range Value

4851 Flow Correction (K-Factor)

If the user knows the change required to match the balancers reading select the K-Factor

Menu and enter this value for the K-Factor The minimum and maximum allowable K-Factor

Value is displayed in the K-Factor Menu

Field Setup

Menu

Flow Correction Flow Correction

AutoZero K-Factor K-Factor Range

Temp Comp (085 13)

Display Filter K-Factor Calc K=(01000)

4852 Flow Correction (K-Factor Calculator)

If the new K-factor Value needs to be calculated select the K-Factor Calc Menu Enter the

Displayed Value on the AAON Airflow Signal Processor and actual Measured Value press

Enter and the change will be calculated and stored as the new K-Factor Value

Field Setup

Menu

Flow Correction Displayed Value

AutoZero K-Factor (000000)

Temp Comp Measured Value

Display Filter K-Factor Calc (000000)

-FLOW CORRECTION EXAMPLE-

The balancer is consistently measuring a value of 9500 CFM which is 500 CFM less than the

10000 CFM value on the AAON Airflow Signal Processor display The user would then

perform the following math function Measured Value Displayed Value = K-Factor so 9500

CFM 10000 CFM = 0950 The user would enter 0950 for the K-Factor Flow Correction If

the K-Factor Calculator is used the K- Factor Flow Correction would automatically update the K

Factor

AutoZero 486

The AutoZero feature corrects any zero offset caused by large ambient temperature changes

22

4861 AutoZero Status

The AutoZero Status Menu allows the user to turn the AutoZero function ON or OFF

Field Setup

Menu

Flow Correction AZ Status AZ Status

AutoZero AZ Interval (ONOFF)

Temp Comp AZ Test Interval

Display Filter (ON)

4862 AutoZero Interval

The AutoZero Interval Menu allows the user to select the AutoZero Interval from once an hour

to once a day in 1 hour increments Use the UPDOWN keys to select the interval value Upon

device power up an AutoZero cycle will occur after 20 seconds

Field Setup

Menu

Flow Correction AZ Status AZ Interval

AutoZero AZ Interval (1 TO 24HR)

Temp Comp AZ Test Interval

Display Filter (01)HR

4863 AutoZero Test Interval

For troubleshooting or testing the AutoZero function the AutoZero Test Interval Menu allows

the user to select an Auto Zero test frequency of once a minute to once every 30 minutes in 1

minute increments Use the UPDOWN keys to select the interval value If AutoZero Test

Interval is turned ON for more than 60 minutes it will automatically default to OFF and the

AutoZero Interval (see Section 4862) will be reactivated

Field Setup

Menu

Flow Correction AZ Status AZ Test Interval

AutoZero AZ Interval (OFF)

Temp Comp AZ Test Interval Interval

Display Filter (1)Min

Temperature Compensation 487

The Temperature Compensation option compensates the flow and velocity signal for density

changes caused by variations in the process air temperature An input signal from AAON

Temperature Transmitter is required see Section 33 for proper temperature transmitter

connection and Section 452 for temperature input signal configuration

23

4871 Temperature Units

The Temperature Units Menu allows the user to select the appropriate temperature units for the

job The default setting is ordmF

Field Setup

Menu

Flow Correction Temperature Units Units

AutoZero Temperature Values (ordmF ordmC)

Temp Comp Temperature Input

Display Filter Fixed Value (ordmF)

4872 Temperature Values

The Temperature Values Menu allows the factory or user to set the minimum and maximum

temperature range values that represent the input signal from the external temperature transmitter

or the building automation system Since the AAON Temperature Transmitter has been supplied

the minimum and maximum temperature range values of -30degF to 130degF have been

preprogramed

Field Setup

Menu

Flow Correction Temperature Units Minimum Value

AutoZero Temperature Values (-030)

Temp Comp Temperature Input Maximum Value

Display Filter Fixed Value (130)

If the temperature values are changed from the factory settings and the new temperature values

cause the existing Operating Range Value to be outside the new calculated Minimum or

Maximum Full Scale Value the below Warning Message will appear and the Operating Range

will be reset to the new Maximum Full Scale Value by pressing Enter The display will

automatically jump to the Operating Range Menu allowing the user to enter a new Operating

Range Value This can be accomplished by performing the steps under Section 481 See

Temperature Range Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

24

Minimum Value

(-000)

Maximum Value

(000)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Min amp

Max Temperature

value and pressing the

Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Temperature Range Example-

Minimum Value

(-000)

Accepted

(100)

4873 Temperature Input

The Temperature Input Menu allows the user to select between three temperature input options

(Fixed Variable and Network) for the flow calculations Since the AAON Temperature

Transmitter has been supplied Variable has been selected If Fixed is selected the default

temperature value entered in the Fixed Value Menu (see Section 4874) is used If Net is

selected the temperature input signal is obtained through network communications The Net

option is only available if one of the communication options is ordered The temperature value

is only displayed on the LCD screen if the Temperature Input is set to Variable or Network

Field Setup

Menu

Flow Correction Temperature Units Temp Input

AutoZero Temperature Values (FixVarNet)

Temp Comp Temperature Input

Display Filter Fixed Value (Variable)

25

4874 Fixed Value

The Fixed Value Menu allows the user to enter a temperature value for the flow calculations

This value will not be displayed on the LCD screen

Field Setup

Menu

Flow Correction Temperature Units Fixed Value

AutoZero Temperature Values (˚F)

Temp Comp Temperature Input

Display Filter Fixed Value (+068)

Display Filter 488

The Display Filter Menu allows the user to adjust the Display Filter rolling average algorithm by

setting the Sample Interval Time value in seconds and the number of rolling average Sample

Counts The adjustment range of the Sample Interval Time is 010 to 655 seconds in 010

increments The Sample Count range is 0 to 150 Sample Counts The Display Filter is

independent of the Process Output Filter Value (See Section 489)

Field Setup

Menu

Flow Correction Sample Interval Time

AutoZero (005)sec

Temp Comp (0-150) Sample Count

Display Filter (010)

Process Output Filter 489

The Process Output Filter Menu allows the user to adjust the Process Output Filters rolling

average algorithm by setting the Sample Interval Time value in seconds and the number of

rolling average Sample Counts The adjustment range of the Sample Interval Time is 010 to

655 seconds in 010 increments The Sample Count range is 0 to 150 Sample Counts The

Process Output Filter is independent of the Display Filter Value (See Section 488)

Field Setup

Menu

Output Filter Sample Interval Time

Alarm Options (005)sec

Factory Defaults (0-150) Sample Count

(010)

26

HighLow Alarm Option 4810

The following menus for configuration of HighLow Alarms are only available if the HighLow

Alarm option is purchased

48101 Alarm Status

The Alarm Status allows the user to independently turn each alarm ON or OFF

Field Setup

Menu

Output Filter Alarm Status Low Alarm

Alarm Options Alarm Value (On)

Factory Defaults Alarm Delay High Alarm

(On)

48102 Alarm Values

The Alarm Value Menu allows the user to enter the Low or the High flow alarm value Alarm

values will be displayed in the same engineering units selected in the Eng Units Menu (see

Section 483)

- High Alarm Function The High Alarm activates if the flow exceeds the High Alarm

value and resets when the flow drops below the High Alarm Value

- Low Alarm Function The Low Alarm activates if the flow drops below the Low

Alarm Value and resets when the flow exceeds the Low Alarm Value

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Value

Alarm Options Alarm Value (000000)

Factory Defaults Alarm Delay Hi Alarm Value

(100000)

48103 Alarm Delay

The Alarm Delay Menu allows the user to enter an alarm delay of 0 to 999 seconds before an

alarm will be activated The alarm will be reset without a delay

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Delay

Alarm Options Alarm Value (000)Seconds

Factory Defaults Alarm Delay Hi Alarm Delay

(000)Seconds

27

Factory Defaults 4811

If parameter configuration changes have been made incorrectly to the AAON Airflow Signal

Processor all device settings can be restored to the original AAON factory settings by selecting

YES and pressing Enter in both the Set To Factory Defaults Menu and the Verify Set To Factory

Defaults Menu (see Table 7 below for a list of Saved Settings)

Field Setup

Menu

Output Filter Set To Verify Set To

Alarm Options Factory Defaults Factory Defaults

Factory Defaults

(No) (No)

Table 7 - Factory Defaults

Item Saved Setting Item Saved Setting

1 All Factory Calibration Points (12) 14 MAC Address

2 Area Factor 15 Instance Number

3 Operating Range 16 Engineering Units

4 4 Pt Flow Correction 17 Display Filter Values

5 Altitude 18 Output Filter

6 K-Factor 19 DP Display Format

7 Lockdown amp Delay Values 20 Output Calibration

8 Flow Correction 21 AutoZero Status

9 Flow Coefficient 22 AutoZero Interval

10 Min amp Max Temp Range Values 23 Temp Units

11 Alarm Status 24 Temp Input

12 Alarm Values 25 Temp Fixed Value

13 Alarm Delay 26 Baud Rate

28

49 TECH CONFIGURATION MENUS

To set parameters under the Tech Configuration Menu refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 491

through 4911 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

Area Factor 491

To convert the differential pressure signal from the AAON Airflow Station to a flow value the

Area Factor associated with the AAON Airflow Station has been preprogramed by the factory

If the Area Factor needs to be checked or reconfigured the correct Area Factor for the AAON

Airflow Station can be found on the AAON Airflow Station product label installed in the air

handling unit

Tech Config

Password 1000

Area Factor Area Factor

Min Calibration (FT2)

Span Calibration

Altitude (001000)

29

If the Area Factor is reconfigured and the new Area Factor causes the existing Operating Range

Value to be outside the new calculated Minimum or Maximum Full Scale Value the below

Warning Message will appear and the Operating Range will be reset to the new Maximum Full

Scale Value by pressing Enter The display will automatically jump to the Operating Range

Menu allowing the user to enter a new Operating Range Value This can be accomplished by

performing the steps under Section 481 See Area Factor Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Area Factor

(FT )

(001000)

Area Factor

(FT )

Accepted

(001200)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Area

Factor and pressing

the Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Area Factor Example-

2

2

30

Minimum Calibration 492

The Minimum Calibration Menu allows a user to perform a minimum transducer calibration

This value will be placed in a different memory location and used until a Return to Factory

Defaults is selected (see Section 4811)

(Caution Before performing a minimum calibration disconnect the Total (High) and Static

(Low) Pressure connections perform a minimum calibration and then reconnect the Total

and Static Pressure connections)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00000) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Span Calibration 493

The Span Calibration Menu allows the user to perform a span transducer calibration to eliminate

any possible transducer drift This value will be placed in a different memory location than the

Factory Span memory location and used until a Return to Factory Defaults is selected (see

Section 4811)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00570) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Altitude 494

The Altitude Menu allows the user to enter the specific altitude for the job for the density

calculations the job specific site Altitude has been preprogramed by the factory

Tech Config

Password 1000

Area Factor Altitude

Min Calibration

Span Calibration (0000)Ft

Altitude

31

If the Altitude is changed from the factory setting and the new Altitude causes the existing

Operating Range Value to be outside the new calculated Minimum or Maximum Full Scale

Value the below Warning Message will appear and the Operating Range will be reset to the new

Maximum Full Scale Value by pressing Enter The display will automatically jump to the

Operating Range Menu allowing the user to enter a new Operating Range Value This can be

accomplished by performing the steps under Section 481 See Altitude Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Altitude

(0000)Ft

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Altitude

and pressing the Enter

button will calculate

new Min amp Max Op

Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Altitude Example-

Altitude

Accepted

(0100)Ft

32

Process Output Calibration 495

4951 Minimum Calibration

The Minimum Calibration Menu allows the user to make output zero adjustments Monitor the

output and with each Up or Down key depression the output will increase or decrease by

001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

4952 Span Calibration

The Span Calibration Menu allows the user to make output span adjustments Span adjustments

require a low pressure air source adjusted to the Full Scale Value shown on the side label

Monitor the output and with each Up or Down button depression the output will increase or

decrease by 001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

Probe Coefficient 496

The Probe Correction Coefficient Menu allows the user to modify the formula constant of

109670 used for non-amplified Pitot-type flow sensors

Tech Config

Password 1000

Output Calibration Correction Coeff

Correction Coeff Probe

4PT Flow Corr (109670)

MAC Address (00109670)

33

Four Point Flow Correction 497

The Four Point Flow Correction Menu allows the user to make corrections to the display and

output signal at 20 increments between 20 and 80 of the Operating Range Value entered

The Displayed Value is a fixed value determined by the percentage of Operating Range The

Measured Value is the value determined by an independent balancerrsquos reading

Tech Config

Password 1000

Output Calibration 80000 CFM Displayed Value

Correction Coeff 60000 CFM 80000

4PT Flow Corr 40000 CFM Measured Value

MAC Address 20000 CFM 79500

80000 CFM Displayed Value

60000 CFM 60000

40000 CFM Measured Value

20000 CFM 60500

80000 CFM Displayed Value

60000 CFM 40000

40000 CFM Measured Value

20000 CFM 40100

80000 CFM Displayed Value

60000 CFM 20000

40000 CFM Measured Value

20000 CFM 19500

MAC Address (BACnet Communication Option) 498

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network The default is 002 For

additional information refer to Section 411

Tech Config

Password 1000

Output Calibration MAC Address

Correction Coeff (Range = 02 to 254)

4PT Flow Corr

MAC Address (002)

34

Instance Number (BACnet Communication Option) 499

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The default is 1002 For

additional information refer to Section 411

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (Default = 1002)

Instance Number

Modbus ID (01002)

Modbus ID (Modbus Communication Option) 4910

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network The default is 002 For

communication with WattMaster Controls the Modbus ID has been set by the factory to 009 for

outside airflow applications For additional information refer to the Section 411

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

Baud Rate (BACnet amp Modbus Communication Options) 4911

The Baud Rate Menu allows the user to set a unique network baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate Modbus communications supports

96 192 384 576 and 1152 Kbps baud rate The default is 384 Kbps For communication

with WattMaster Controls the Baud Rate has been set by the factory to 96 Kbps For additional

information refer to Section 411

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

35

410 WARNING MESSAGES

Input Pressure Overrange Message 4101

If the input pressure exceeds the entered Operating Range Value the following message will

appear on the display It will alternate between the process display and the error message until

the input falls below the Operating Range Value

- Caution -

Input Beyond

Operating Range

Selected

Transducer Calibration Message 4102

If during a transducer zero or span calibration process the transducer output pressure value

measured exceeds plusmn20 of the expected value the following message will appear on the display

Once the Enter button is pressed the display returns to the previous calibration menu

Value entered is

Outside Factory

set limits

(Press Enter)

Operating Range Message 4103

If the new values entered for Temperature Compensation Area Factor or Altitude (see Sections

487 491 and 494) causes the Operating Range Value to exceed the new calculated

Maximum Full Scale Value the following message will appear on the display

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

New Operating Range Message 4104

If a user enters a new Operating Range Value the following message will appear on the display

notifying the user that if any 4 PT Flow Correction Values (see Section 497) were previously

entered they will be reset The message allows the user to confirm that the Operating Range

change should be made To complete the Operating Range change the user must use the

UPDown buttons to change the NO to a YES and press the ENTER button

Value will

Reset 4PT

Flow Correction

Values

Make the Change

(NO)

(Press Enter)

36

411 NETWORK COMMUNICATION

The AAON Airflow Signal Processor can be ordered with BACnet Modbus or LonWorks

Communication For BACnet Communication the AAON Airflow Signal Processors utilize

MSTP (Master SlaveToken Passing) BACnet type protocol BACnet is implemented using

EIA-485 signaling standards through a shielded twisted pair wire operating at a baud rate of 96

Kbps to 768 Kbps Each device has a unique MAC Address ranging from 2 to 127 Refer to

Section 4113 for BACnet Protocol Implementation Conformance Statements (PICS) For

Modbus Communication the AAON Airflow Signal Processors utilize the Modbus ndash RTU Slave

protocol using EIA-485 signaling standards through a shielded twisted pair wire operating at a

baud rate of 96 Kbps to 1152 Kbps Each device has a unique Modbus ID ranging from 1 to

254 Refer to Section 4114 for Modbus software configuration parameters For LonWorks

Communication each AAON Airflow Signal Processor has a unique Neuron Chip ID which is

loaded on the network by pressing a service switch located on the main board (see Section

4111 Figure 7) The LonWorks network utilizes a shielded twisted pair wire operating at a

fixed baud rate of 78 Kbps Refer to Section 4115 for LonWorks network variables

Sections 4111 and 4112 contain procedures for electrical connection of the AAON Airflow

Signal Processor to the network and for configuring the required communication parameters

Electrical Connection 4111

The following procedure outlines the steps for installing the interface wiring for network

communication Network wire should be low capacitance shielded 22 or 24 AWG twisted pair

with PVC jacket such as Belden Part numbers 9841 3105A or equivalent

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Verify that the Power Switch (S3) is in the OFF position and install the interface

wiring for Pins 9 and 10 as shown in Figure 7 If multiple AAON Airflow Signal

Processors will be connected to the same network see Figure 8 for connecting

multiple devices For network systems that require all devices to have a common

signal ground refer to Figure 9 for electrical connection The J2 electrical

connector has a removable terminal block for ease of installing the interface

wiring

Step 4 For proper operation of BACnet and Modbus communication networks the

device that is electrically installed at the end of the network may require the

Terminator Switch be moved to the ON position to prevent line and data

reflection If Terminator is required it must be applied to both physical ends of

the network All other devices should have the Terminator Switch in the OFF

position The communication board is located on the back side of the main

AAON Airflow Signal Processor board See Figure 10 below for Terminator

Switch location on the communication board

Step 5 For LonWorks Communication refer to Figure 7 for the location of the Lon

Service Pin

37

Step 6 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 7 Configure the required parameters as outlined in Section 4112

Step 8 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

RP1

S3

NETWORK

COMMUNICATION+

-

LON

SERVICE PIN

Figure 7 - Network Communication Electrical Connection

38

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

AAON AIRFLOW

SIGNAL PROCESSOR

CONNECT ONLY ONE END OF SHIELD

WIRE TO EARTH GROUND AS SHOWN

SET TERMINATOR SWITCH

ON IF REQUIRED

NETWORK

COMMUNICATIONS

NETWORK

CONNECT SHIELD

WIRES TOGETHER

CONNECT SHIELD

WIRES TOGETHER

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not

Requiring Common Signal Grounds

Note If using two conductor communication wire use the shield wire to connect all device signal grounds together as shown in the figure below If using three conductor communication wire use the 3rd conductor to connect all device signal grounds together and connect one side of the shield to earth ground

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

SIGNAL

GROUND

8

J2

SIGNAL

GROUND

8

J28

J2

USE SHIELD WIRE OR 3RD CONDUCTOR TO

CONNECT DEVICE SIGNAL GROUND TO

NETWORK SIGNAL GROUND

SET TERMINATOR SWITCH

ON IF REQUIRED

AAON AIRFLOW

SIGNAL PROCESSOR

NETWORK

COMMUNICATIONS

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

SIGNAL

GROUND

SIGNAL

GROUND

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds

39

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location

COMMUNICATION BOARD ID

BOARD SERIAL NO

40

Parameter Configuration 4112

If BACnet or Modbus communication is ordered the associated settings will need to be

configured with the exception of Modbus communication with WattMaster Controls which has

been configured at the factory To set the parameters refer to the following procedure below

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 41121

through 41124 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

41121 MAC Address (BACnet Communication Option)

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network Each AAON Airflow Signal

Processor must have a unique MAC Address assigned ranging from 2 to 127

Tech Config

Password 1000

4PT Flow Corr MAC Address

MAC Address (Range = 02 to 254)

Instance Number

Modbus ID (002)

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 12: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

12

43 DIMENSIONS

100000ACFM

75 F

J1 J2

TOTALCONNECTION

STATICCONNECTION

462

5785

2265

350

525

Air Fl o wS IGN AL PROCES S OR

AAON

44 ELECTRICAL amp PNEUMATIC CONNECTIONS

All electrical and pneumatic connections to the AAON Airflow Signal Processor have been

made at the factory as shown in Figures 3 through 5 below with the exception of the electrical

connection for the HighLow Alarm Option if ordered and for network communication options

other than with WattMaster Controls The following procedure outlines the steps for turning

ON the AAON Airflow Signal Processor if network communication is required see Section

411 prior to turning ON the AAON Airflow Signal Processor

Caution ndash If electrical connections need to be rewired all electrical connections must be made

with the AAON Airflow Signal Processor Power Switch in the OFF position The three

electrical connectors (J1 J2 and optional J3) have removable terminal blocks for ease of

installing the interface wiring

13

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 4 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

(24VACDC)

POWER SUPPLY

ANALOG RECEIVING DEVICE

PROCESS OUTPUT

S1S2 S4

+

-

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

SWITCH POSITIONS

SHOWN IN BLACK

S1 POSITION

INDICATING 4-20mA

TEMPERATURE INPUT

S2 AND S4 POSITIONS

INDICATING 0-10VDC

PROCESS OUTPUT

RP1

S3

AAON

TEMPERATURE

TRANSMITTER

(4-20mA LOOP POWERED)+

-

Figure 3 - Electrical Connections

14

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROCOUTPUT

mA

V

10V

5V

(24VACDC)

POWER SUPPLY

ANALOG RECEIVING DEVICE

PROCESS OUTPUT

S1S2 S4

+

-

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

SWITCH POSITIONS

SHOWN IN BLACK

S1 POSITION

INDICATING 4-20mA

TEMPERATURE INPUT

S2 AND S4 POSITIONS

INDICATING 0-10VDC

PROCESS OUTPUT

RP1

S3

E-BUS DISTRIBUTION MODULE

+-

AAON

TEMPERATURE

TRANSMITTER

(4-20mA LOOP POWERED)+

-

- COMM

+ COMM

GND

THE SHIELDING WIRE SHOULD BE USED TO

CONNECT WATTMASTER GROUND TO AIRFLOW

SIGNAL PROCESSOR GROUND

Figure 4 - Electrical Connection with Wattmaster Controls

15

J1 J2

TOTAL

CONNECTION

STATIC

CONNECTION

TOTAL PRESSURE CONECTION

AAON AIRFLOW STATION

STATIC PRESSURE CONNECTION

AAON AIRFLOW STATION

Figure 5 - Pneumatic Connections

45 INPUTOUTPUT SET-UP

If input or output configuration changes are required refer to the Tables 1 and 2 in the sections

below and Figure 3 in Section 44

Process Output 451

If controls are provided by AAON the process output has been set by the factory for input to the

specific controller otherwise the default is 0-10VDC To change the output configuration set

the S2 amp S4 switches as follows

Table 1 - Process Output Switch Configuration

Process Output Range S2 S4

Current 4-20mA NA mA

Voltage 0-10VDC 10V V

Voltage 0-5VDC 5V V

Temperature Input 452

Since the AAON Temperature Transmitter has been provided the temperature input has been set

by the factory for 4-20mA To change the input configuration set the S1 switch as follows

Table 2 - Temperature Input Switch

Configuration

Temperature Input S1 Switch Selection

4-20mA mA

0-10VDC V

16

46 ACTIVE DISPLAYS amp KEY FUNCTIONS

Power-up Initiation Display 461

Upon initial power-up Software Revision information will be displayed on the graphic display

for approximately 5 seconds

EQ-1

Software Rev XXXXX

Modbus Rev XXXXX

Process Display Descriptions 462

After power-up initialization the following information will appear on the graphic display

depending upon the options purchased

75˚F

75˚F

75˚F

000000

000000

000000

AutoZero

ACFM

High Alarm

ACFM

Low Alarm

ACFM

Flow Monitoring with an

Auto Zero Cycle

Flow Monitoring with a

High Alarm Condition

Flow Monitoring with a

Low Alarm Condition

Table 3 - Process Display Descriptions

Number Description

1 Process value

2 Air Flow temperature units in degree F or C

3 Flashing Asterisk indicates the CPU is functioning

4 Engineering units

5 Displayed during an AutoZero cycle

6 Indicating High Alarm Value has been exceeded (HighLow Alarm Option)

7 Indicating Low Alarm Value has been exceeded (HighLow Alarm Option)

12 3

4

6

7 5

17

Key Functions 463

The following figure and description identify the function of each Key

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

2

13

4

567

8

RP1 9

Figure 6 - Key Functions

Table 4 - Key Functions

Number Description

1 Enter Key - Allows a user to enter into the Field Menu enter into a selected menu item

or store into memory changes made to the program

2 Up Key - Allows the user to scroll up in the menu list to a selected item or increase digits

when making value changes

3 Right Key - When making changes to user values the Right Key allows the user to scroll

to the correct digit for changes

4 Down Key - Allows the user to scroll down in the menu list to a selected item or

decrease digits when making value changes

5 Left Key - When making changes to user values the Left Key allows the user to scroll to

the correct digit for changes

6

Escape Key - The Escape Key allows the user to back out of the menu to the Active

Display If a user starts to make a change and decides to cancel the change the Escape

Key will allow the user to return to the Active Display without making the change

7 Power Switch ndash Allows a user to turn power off to the AAON Signal Processor during

field wiring or modifications to the device

8 Lon Switch ndash Allows a user to send a unique Neuron device ID when connecting to a

LonWorks communication network

9 RP1 ndash Allows a user to adjust the display contrast

18

47 DISPLAY MENUS

Table 5 shows the Field Setup and Tech Configuration Menus The display will vary depending

upon the options purchased

Table 5 - Display Menus

Field Setup Menu

(Press ENTER Key)

Tech Configuration Menu

(Press UPDOWN Keys simultaneously)

(Enter Password number 1000)

(Press ENTER Key)

Operating Range Area Factor

Zero Calibration Min Calibration

Eng Units Span Calibration

Lockdown Temp Fixed Value

Flow Correction Altitude

AutoZero Output Calibration

Temp Comp Correction Coeff

Display Filter 4PT Flow Corr

Output Filter MAC Address (Optional)

Alarm Options (Optional) Instance Number (Optional)

Factory Defaults Modbus ID (Optional)

Baud Rate (Optional)

48 FIELD SETUP MENUS

To set parameters under the Field Setup Menus refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Field Setup Menu by depressing and holding the Enter Key for 5

seconds

Step 2 Once in the Field Setup Menu use the UpDown Keys to highlight the

required parameter for configuration as shown in Sections 481 through

4811 Press the Enter Key once to access the highlighted parameter

Menu

Step 3 Once in the parameter menu the parameter can be changed using

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Field

Setup Menu

Step 4 After all of the required parameters have been configured exit the Field

Setup Menu by pressing the ESC Key The Process Display (see Section

462) will then be displayed

19

Operating Range 481

The Operating Range allows the user to enter a value which will represent 100 of the process

output signal (5VDC 10VDC or 20mA) The Operating Range Value has been set by the

factory to equal 110 of the design supply flow rate unless this value is less than the Minimum

Full Scale Value allowed for the AAON Airflow Signal Processor The menu will display the

Minimum Full Scale Value allowed which is then entered as the Operating Range

Field Setup

Menu

Operating Range Operating Range

Zero Calibration ( ACFM )

Engineering Units (6000-12000)

Lockdown (010000)

Zero Pressure Calibration 482

The Zero Calibration Menu allows the user to perform a zero transducer calibration to eliminate

any transducer zero shift

(Caution Before performing a zero calibration disconnect the Total (High) and Static (Low)

pressure connections perform a zero calibration and then reconnect the Total and Static

pressure connections)

Field Setup

Menu

Operating Range Input Value CPU Taking

Zero Calibration (0000) Inch wc Samples

Engineering Units

Lockdown (Press Enter) (Please Wait)

Engineering Units 483

Table 6 lists the engineering units that are available for the user to select from for display

purposes Changing the engineering units will affect the process display and the alarm value

menus The default setting is ACFM

Field Setup

Menu

Operating Range Eng Units

Zero Calibration

Engineering Units (ACFM)

Lockdown

20

Table 6 - Engineering Units

Standard

Flow

Units

Actual

Flow

Units

SCFM ACFM

SCFH LS

SLS Am3S

Sm3S Am3M

Sm3M Am3HR

Sm3HR

Lockdown 484

Due to the high square root gain associated with very low delta p values the display and process

output are locked to a zero value until the input value reaches the specified Lockdown Value that

was entered Above the Lockdown Value the output is linear to air flow

4841 Lockdown Value

The Lockdown Value can be changed from 0 to 20 of Operating Range Value Lockdown

Values can be changed in 1 increments The recommended standard is 5

Field Setup

Menu

Operating Range Lockdown (0-20)

Zero Calibration (5)

Engineering Units Delay (0-20 sec)

Lockdown (2) Sec

4842 Lockdown Delay

The Lockdown Delay Menu allows the user to enter a lockdown time delay (0-20 seconds) that

will delay the display and output lockdown from occurring until the flow value or output value

has remained below the lockdown value for that duration

Field Setup

Menu

Operating Range Lockdown (0-20)

Zero Calibration (5)

Engineering Units Delay (0-20 sec)

Lockdown (2) Sec

21

Flow Correction 485

The Flow Correction Menu was incorporated into the AAON Airflow Signal Processor to give

the user an easy way to make corrections to the display and output without changing the

Operating Range Value entered by the factory or user The Flow Correction Menu would be

used to correct for a constant error from zero to the entered Operating Range Value

4851 Flow Correction (K-Factor)

If the user knows the change required to match the balancers reading select the K-Factor

Menu and enter this value for the K-Factor The minimum and maximum allowable K-Factor

Value is displayed in the K-Factor Menu

Field Setup

Menu

Flow Correction Flow Correction

AutoZero K-Factor K-Factor Range

Temp Comp (085 13)

Display Filter K-Factor Calc K=(01000)

4852 Flow Correction (K-Factor Calculator)

If the new K-factor Value needs to be calculated select the K-Factor Calc Menu Enter the

Displayed Value on the AAON Airflow Signal Processor and actual Measured Value press

Enter and the change will be calculated and stored as the new K-Factor Value

Field Setup

Menu

Flow Correction Displayed Value

AutoZero K-Factor (000000)

Temp Comp Measured Value

Display Filter K-Factor Calc (000000)

-FLOW CORRECTION EXAMPLE-

The balancer is consistently measuring a value of 9500 CFM which is 500 CFM less than the

10000 CFM value on the AAON Airflow Signal Processor display The user would then

perform the following math function Measured Value Displayed Value = K-Factor so 9500

CFM 10000 CFM = 0950 The user would enter 0950 for the K-Factor Flow Correction If

the K-Factor Calculator is used the K- Factor Flow Correction would automatically update the K

Factor

AutoZero 486

The AutoZero feature corrects any zero offset caused by large ambient temperature changes

22

4861 AutoZero Status

The AutoZero Status Menu allows the user to turn the AutoZero function ON or OFF

Field Setup

Menu

Flow Correction AZ Status AZ Status

AutoZero AZ Interval (ONOFF)

Temp Comp AZ Test Interval

Display Filter (ON)

4862 AutoZero Interval

The AutoZero Interval Menu allows the user to select the AutoZero Interval from once an hour

to once a day in 1 hour increments Use the UPDOWN keys to select the interval value Upon

device power up an AutoZero cycle will occur after 20 seconds

Field Setup

Menu

Flow Correction AZ Status AZ Interval

AutoZero AZ Interval (1 TO 24HR)

Temp Comp AZ Test Interval

Display Filter (01)HR

4863 AutoZero Test Interval

For troubleshooting or testing the AutoZero function the AutoZero Test Interval Menu allows

the user to select an Auto Zero test frequency of once a minute to once every 30 minutes in 1

minute increments Use the UPDOWN keys to select the interval value If AutoZero Test

Interval is turned ON for more than 60 minutes it will automatically default to OFF and the

AutoZero Interval (see Section 4862) will be reactivated

Field Setup

Menu

Flow Correction AZ Status AZ Test Interval

AutoZero AZ Interval (OFF)

Temp Comp AZ Test Interval Interval

Display Filter (1)Min

Temperature Compensation 487

The Temperature Compensation option compensates the flow and velocity signal for density

changes caused by variations in the process air temperature An input signal from AAON

Temperature Transmitter is required see Section 33 for proper temperature transmitter

connection and Section 452 for temperature input signal configuration

23

4871 Temperature Units

The Temperature Units Menu allows the user to select the appropriate temperature units for the

job The default setting is ordmF

Field Setup

Menu

Flow Correction Temperature Units Units

AutoZero Temperature Values (ordmF ordmC)

Temp Comp Temperature Input

Display Filter Fixed Value (ordmF)

4872 Temperature Values

The Temperature Values Menu allows the factory or user to set the minimum and maximum

temperature range values that represent the input signal from the external temperature transmitter

or the building automation system Since the AAON Temperature Transmitter has been supplied

the minimum and maximum temperature range values of -30degF to 130degF have been

preprogramed

Field Setup

Menu

Flow Correction Temperature Units Minimum Value

AutoZero Temperature Values (-030)

Temp Comp Temperature Input Maximum Value

Display Filter Fixed Value (130)

If the temperature values are changed from the factory settings and the new temperature values

cause the existing Operating Range Value to be outside the new calculated Minimum or

Maximum Full Scale Value the below Warning Message will appear and the Operating Range

will be reset to the new Maximum Full Scale Value by pressing Enter The display will

automatically jump to the Operating Range Menu allowing the user to enter a new Operating

Range Value This can be accomplished by performing the steps under Section 481 See

Temperature Range Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

24

Minimum Value

(-000)

Maximum Value

(000)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Min amp

Max Temperature

value and pressing the

Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Temperature Range Example-

Minimum Value

(-000)

Accepted

(100)

4873 Temperature Input

The Temperature Input Menu allows the user to select between three temperature input options

(Fixed Variable and Network) for the flow calculations Since the AAON Temperature

Transmitter has been supplied Variable has been selected If Fixed is selected the default

temperature value entered in the Fixed Value Menu (see Section 4874) is used If Net is

selected the temperature input signal is obtained through network communications The Net

option is only available if one of the communication options is ordered The temperature value

is only displayed on the LCD screen if the Temperature Input is set to Variable or Network

Field Setup

Menu

Flow Correction Temperature Units Temp Input

AutoZero Temperature Values (FixVarNet)

Temp Comp Temperature Input

Display Filter Fixed Value (Variable)

25

4874 Fixed Value

The Fixed Value Menu allows the user to enter a temperature value for the flow calculations

This value will not be displayed on the LCD screen

Field Setup

Menu

Flow Correction Temperature Units Fixed Value

AutoZero Temperature Values (˚F)

Temp Comp Temperature Input

Display Filter Fixed Value (+068)

Display Filter 488

The Display Filter Menu allows the user to adjust the Display Filter rolling average algorithm by

setting the Sample Interval Time value in seconds and the number of rolling average Sample

Counts The adjustment range of the Sample Interval Time is 010 to 655 seconds in 010

increments The Sample Count range is 0 to 150 Sample Counts The Display Filter is

independent of the Process Output Filter Value (See Section 489)

Field Setup

Menu

Flow Correction Sample Interval Time

AutoZero (005)sec

Temp Comp (0-150) Sample Count

Display Filter (010)

Process Output Filter 489

The Process Output Filter Menu allows the user to adjust the Process Output Filters rolling

average algorithm by setting the Sample Interval Time value in seconds and the number of

rolling average Sample Counts The adjustment range of the Sample Interval Time is 010 to

655 seconds in 010 increments The Sample Count range is 0 to 150 Sample Counts The

Process Output Filter is independent of the Display Filter Value (See Section 488)

Field Setup

Menu

Output Filter Sample Interval Time

Alarm Options (005)sec

Factory Defaults (0-150) Sample Count

(010)

26

HighLow Alarm Option 4810

The following menus for configuration of HighLow Alarms are only available if the HighLow

Alarm option is purchased

48101 Alarm Status

The Alarm Status allows the user to independently turn each alarm ON or OFF

Field Setup

Menu

Output Filter Alarm Status Low Alarm

Alarm Options Alarm Value (On)

Factory Defaults Alarm Delay High Alarm

(On)

48102 Alarm Values

The Alarm Value Menu allows the user to enter the Low or the High flow alarm value Alarm

values will be displayed in the same engineering units selected in the Eng Units Menu (see

Section 483)

- High Alarm Function The High Alarm activates if the flow exceeds the High Alarm

value and resets when the flow drops below the High Alarm Value

- Low Alarm Function The Low Alarm activates if the flow drops below the Low

Alarm Value and resets when the flow exceeds the Low Alarm Value

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Value

Alarm Options Alarm Value (000000)

Factory Defaults Alarm Delay Hi Alarm Value

(100000)

48103 Alarm Delay

The Alarm Delay Menu allows the user to enter an alarm delay of 0 to 999 seconds before an

alarm will be activated The alarm will be reset without a delay

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Delay

Alarm Options Alarm Value (000)Seconds

Factory Defaults Alarm Delay Hi Alarm Delay

(000)Seconds

27

Factory Defaults 4811

If parameter configuration changes have been made incorrectly to the AAON Airflow Signal

Processor all device settings can be restored to the original AAON factory settings by selecting

YES and pressing Enter in both the Set To Factory Defaults Menu and the Verify Set To Factory

Defaults Menu (see Table 7 below for a list of Saved Settings)

Field Setup

Menu

Output Filter Set To Verify Set To

Alarm Options Factory Defaults Factory Defaults

Factory Defaults

(No) (No)

Table 7 - Factory Defaults

Item Saved Setting Item Saved Setting

1 All Factory Calibration Points (12) 14 MAC Address

2 Area Factor 15 Instance Number

3 Operating Range 16 Engineering Units

4 4 Pt Flow Correction 17 Display Filter Values

5 Altitude 18 Output Filter

6 K-Factor 19 DP Display Format

7 Lockdown amp Delay Values 20 Output Calibration

8 Flow Correction 21 AutoZero Status

9 Flow Coefficient 22 AutoZero Interval

10 Min amp Max Temp Range Values 23 Temp Units

11 Alarm Status 24 Temp Input

12 Alarm Values 25 Temp Fixed Value

13 Alarm Delay 26 Baud Rate

28

49 TECH CONFIGURATION MENUS

To set parameters under the Tech Configuration Menu refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 491

through 4911 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

Area Factor 491

To convert the differential pressure signal from the AAON Airflow Station to a flow value the

Area Factor associated with the AAON Airflow Station has been preprogramed by the factory

If the Area Factor needs to be checked or reconfigured the correct Area Factor for the AAON

Airflow Station can be found on the AAON Airflow Station product label installed in the air

handling unit

Tech Config

Password 1000

Area Factor Area Factor

Min Calibration (FT2)

Span Calibration

Altitude (001000)

29

If the Area Factor is reconfigured and the new Area Factor causes the existing Operating Range

Value to be outside the new calculated Minimum or Maximum Full Scale Value the below

Warning Message will appear and the Operating Range will be reset to the new Maximum Full

Scale Value by pressing Enter The display will automatically jump to the Operating Range

Menu allowing the user to enter a new Operating Range Value This can be accomplished by

performing the steps under Section 481 See Area Factor Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Area Factor

(FT )

(001000)

Area Factor

(FT )

Accepted

(001200)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Area

Factor and pressing

the Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Area Factor Example-

2

2

30

Minimum Calibration 492

The Minimum Calibration Menu allows a user to perform a minimum transducer calibration

This value will be placed in a different memory location and used until a Return to Factory

Defaults is selected (see Section 4811)

(Caution Before performing a minimum calibration disconnect the Total (High) and Static

(Low) Pressure connections perform a minimum calibration and then reconnect the Total

and Static Pressure connections)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00000) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Span Calibration 493

The Span Calibration Menu allows the user to perform a span transducer calibration to eliminate

any possible transducer drift This value will be placed in a different memory location than the

Factory Span memory location and used until a Return to Factory Defaults is selected (see

Section 4811)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00570) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Altitude 494

The Altitude Menu allows the user to enter the specific altitude for the job for the density

calculations the job specific site Altitude has been preprogramed by the factory

Tech Config

Password 1000

Area Factor Altitude

Min Calibration

Span Calibration (0000)Ft

Altitude

31

If the Altitude is changed from the factory setting and the new Altitude causes the existing

Operating Range Value to be outside the new calculated Minimum or Maximum Full Scale

Value the below Warning Message will appear and the Operating Range will be reset to the new

Maximum Full Scale Value by pressing Enter The display will automatically jump to the

Operating Range Menu allowing the user to enter a new Operating Range Value This can be

accomplished by performing the steps under Section 481 See Altitude Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Altitude

(0000)Ft

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Altitude

and pressing the Enter

button will calculate

new Min amp Max Op

Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Altitude Example-

Altitude

Accepted

(0100)Ft

32

Process Output Calibration 495

4951 Minimum Calibration

The Minimum Calibration Menu allows the user to make output zero adjustments Monitor the

output and with each Up or Down key depression the output will increase or decrease by

001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

4952 Span Calibration

The Span Calibration Menu allows the user to make output span adjustments Span adjustments

require a low pressure air source adjusted to the Full Scale Value shown on the side label

Monitor the output and with each Up or Down button depression the output will increase or

decrease by 001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

Probe Coefficient 496

The Probe Correction Coefficient Menu allows the user to modify the formula constant of

109670 used for non-amplified Pitot-type flow sensors

Tech Config

Password 1000

Output Calibration Correction Coeff

Correction Coeff Probe

4PT Flow Corr (109670)

MAC Address (00109670)

33

Four Point Flow Correction 497

The Four Point Flow Correction Menu allows the user to make corrections to the display and

output signal at 20 increments between 20 and 80 of the Operating Range Value entered

The Displayed Value is a fixed value determined by the percentage of Operating Range The

Measured Value is the value determined by an independent balancerrsquos reading

Tech Config

Password 1000

Output Calibration 80000 CFM Displayed Value

Correction Coeff 60000 CFM 80000

4PT Flow Corr 40000 CFM Measured Value

MAC Address 20000 CFM 79500

80000 CFM Displayed Value

60000 CFM 60000

40000 CFM Measured Value

20000 CFM 60500

80000 CFM Displayed Value

60000 CFM 40000

40000 CFM Measured Value

20000 CFM 40100

80000 CFM Displayed Value

60000 CFM 20000

40000 CFM Measured Value

20000 CFM 19500

MAC Address (BACnet Communication Option) 498

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network The default is 002 For

additional information refer to Section 411

Tech Config

Password 1000

Output Calibration MAC Address

Correction Coeff (Range = 02 to 254)

4PT Flow Corr

MAC Address (002)

34

Instance Number (BACnet Communication Option) 499

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The default is 1002 For

additional information refer to Section 411

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (Default = 1002)

Instance Number

Modbus ID (01002)

Modbus ID (Modbus Communication Option) 4910

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network The default is 002 For

communication with WattMaster Controls the Modbus ID has been set by the factory to 009 for

outside airflow applications For additional information refer to the Section 411

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

Baud Rate (BACnet amp Modbus Communication Options) 4911

The Baud Rate Menu allows the user to set a unique network baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate Modbus communications supports

96 192 384 576 and 1152 Kbps baud rate The default is 384 Kbps For communication

with WattMaster Controls the Baud Rate has been set by the factory to 96 Kbps For additional

information refer to Section 411

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

35

410 WARNING MESSAGES

Input Pressure Overrange Message 4101

If the input pressure exceeds the entered Operating Range Value the following message will

appear on the display It will alternate between the process display and the error message until

the input falls below the Operating Range Value

- Caution -

Input Beyond

Operating Range

Selected

Transducer Calibration Message 4102

If during a transducer zero or span calibration process the transducer output pressure value

measured exceeds plusmn20 of the expected value the following message will appear on the display

Once the Enter button is pressed the display returns to the previous calibration menu

Value entered is

Outside Factory

set limits

(Press Enter)

Operating Range Message 4103

If the new values entered for Temperature Compensation Area Factor or Altitude (see Sections

487 491 and 494) causes the Operating Range Value to exceed the new calculated

Maximum Full Scale Value the following message will appear on the display

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

New Operating Range Message 4104

If a user enters a new Operating Range Value the following message will appear on the display

notifying the user that if any 4 PT Flow Correction Values (see Section 497) were previously

entered they will be reset The message allows the user to confirm that the Operating Range

change should be made To complete the Operating Range change the user must use the

UPDown buttons to change the NO to a YES and press the ENTER button

Value will

Reset 4PT

Flow Correction

Values

Make the Change

(NO)

(Press Enter)

36

411 NETWORK COMMUNICATION

The AAON Airflow Signal Processor can be ordered with BACnet Modbus or LonWorks

Communication For BACnet Communication the AAON Airflow Signal Processors utilize

MSTP (Master SlaveToken Passing) BACnet type protocol BACnet is implemented using

EIA-485 signaling standards through a shielded twisted pair wire operating at a baud rate of 96

Kbps to 768 Kbps Each device has a unique MAC Address ranging from 2 to 127 Refer to

Section 4113 for BACnet Protocol Implementation Conformance Statements (PICS) For

Modbus Communication the AAON Airflow Signal Processors utilize the Modbus ndash RTU Slave

protocol using EIA-485 signaling standards through a shielded twisted pair wire operating at a

baud rate of 96 Kbps to 1152 Kbps Each device has a unique Modbus ID ranging from 1 to

254 Refer to Section 4114 for Modbus software configuration parameters For LonWorks

Communication each AAON Airflow Signal Processor has a unique Neuron Chip ID which is

loaded on the network by pressing a service switch located on the main board (see Section

4111 Figure 7) The LonWorks network utilizes a shielded twisted pair wire operating at a

fixed baud rate of 78 Kbps Refer to Section 4115 for LonWorks network variables

Sections 4111 and 4112 contain procedures for electrical connection of the AAON Airflow

Signal Processor to the network and for configuring the required communication parameters

Electrical Connection 4111

The following procedure outlines the steps for installing the interface wiring for network

communication Network wire should be low capacitance shielded 22 or 24 AWG twisted pair

with PVC jacket such as Belden Part numbers 9841 3105A or equivalent

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Verify that the Power Switch (S3) is in the OFF position and install the interface

wiring for Pins 9 and 10 as shown in Figure 7 If multiple AAON Airflow Signal

Processors will be connected to the same network see Figure 8 for connecting

multiple devices For network systems that require all devices to have a common

signal ground refer to Figure 9 for electrical connection The J2 electrical

connector has a removable terminal block for ease of installing the interface

wiring

Step 4 For proper operation of BACnet and Modbus communication networks the

device that is electrically installed at the end of the network may require the

Terminator Switch be moved to the ON position to prevent line and data

reflection If Terminator is required it must be applied to both physical ends of

the network All other devices should have the Terminator Switch in the OFF

position The communication board is located on the back side of the main

AAON Airflow Signal Processor board See Figure 10 below for Terminator

Switch location on the communication board

Step 5 For LonWorks Communication refer to Figure 7 for the location of the Lon

Service Pin

37

Step 6 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 7 Configure the required parameters as outlined in Section 4112

Step 8 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

RP1

S3

NETWORK

COMMUNICATION+

-

LON

SERVICE PIN

Figure 7 - Network Communication Electrical Connection

38

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

AAON AIRFLOW

SIGNAL PROCESSOR

CONNECT ONLY ONE END OF SHIELD

WIRE TO EARTH GROUND AS SHOWN

SET TERMINATOR SWITCH

ON IF REQUIRED

NETWORK

COMMUNICATIONS

NETWORK

CONNECT SHIELD

WIRES TOGETHER

CONNECT SHIELD

WIRES TOGETHER

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not

Requiring Common Signal Grounds

Note If using two conductor communication wire use the shield wire to connect all device signal grounds together as shown in the figure below If using three conductor communication wire use the 3rd conductor to connect all device signal grounds together and connect one side of the shield to earth ground

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

SIGNAL

GROUND

8

J2

SIGNAL

GROUND

8

J28

J2

USE SHIELD WIRE OR 3RD CONDUCTOR TO

CONNECT DEVICE SIGNAL GROUND TO

NETWORK SIGNAL GROUND

SET TERMINATOR SWITCH

ON IF REQUIRED

AAON AIRFLOW

SIGNAL PROCESSOR

NETWORK

COMMUNICATIONS

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

SIGNAL

GROUND

SIGNAL

GROUND

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds

39

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location

COMMUNICATION BOARD ID

BOARD SERIAL NO

40

Parameter Configuration 4112

If BACnet or Modbus communication is ordered the associated settings will need to be

configured with the exception of Modbus communication with WattMaster Controls which has

been configured at the factory To set the parameters refer to the following procedure below

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 41121

through 41124 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

41121 MAC Address (BACnet Communication Option)

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network Each AAON Airflow Signal

Processor must have a unique MAC Address assigned ranging from 2 to 127

Tech Config

Password 1000

4PT Flow Corr MAC Address

MAC Address (Range = 02 to 254)

Instance Number

Modbus ID (002)

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 13: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

13

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 4 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

(24VACDC)

POWER SUPPLY

ANALOG RECEIVING DEVICE

PROCESS OUTPUT

S1S2 S4

+

-

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

SWITCH POSITIONS

SHOWN IN BLACK

S1 POSITION

INDICATING 4-20mA

TEMPERATURE INPUT

S2 AND S4 POSITIONS

INDICATING 0-10VDC

PROCESS OUTPUT

RP1

S3

AAON

TEMPERATURE

TRANSMITTER

(4-20mA LOOP POWERED)+

-

Figure 3 - Electrical Connections

14

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROCOUTPUT

mA

V

10V

5V

(24VACDC)

POWER SUPPLY

ANALOG RECEIVING DEVICE

PROCESS OUTPUT

S1S2 S4

+

-

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

SWITCH POSITIONS

SHOWN IN BLACK

S1 POSITION

INDICATING 4-20mA

TEMPERATURE INPUT

S2 AND S4 POSITIONS

INDICATING 0-10VDC

PROCESS OUTPUT

RP1

S3

E-BUS DISTRIBUTION MODULE

+-

AAON

TEMPERATURE

TRANSMITTER

(4-20mA LOOP POWERED)+

-

- COMM

+ COMM

GND

THE SHIELDING WIRE SHOULD BE USED TO

CONNECT WATTMASTER GROUND TO AIRFLOW

SIGNAL PROCESSOR GROUND

Figure 4 - Electrical Connection with Wattmaster Controls

15

J1 J2

TOTAL

CONNECTION

STATIC

CONNECTION

TOTAL PRESSURE CONECTION

AAON AIRFLOW STATION

STATIC PRESSURE CONNECTION

AAON AIRFLOW STATION

Figure 5 - Pneumatic Connections

45 INPUTOUTPUT SET-UP

If input or output configuration changes are required refer to the Tables 1 and 2 in the sections

below and Figure 3 in Section 44

Process Output 451

If controls are provided by AAON the process output has been set by the factory for input to the

specific controller otherwise the default is 0-10VDC To change the output configuration set

the S2 amp S4 switches as follows

Table 1 - Process Output Switch Configuration

Process Output Range S2 S4

Current 4-20mA NA mA

Voltage 0-10VDC 10V V

Voltage 0-5VDC 5V V

Temperature Input 452

Since the AAON Temperature Transmitter has been provided the temperature input has been set

by the factory for 4-20mA To change the input configuration set the S1 switch as follows

Table 2 - Temperature Input Switch

Configuration

Temperature Input S1 Switch Selection

4-20mA mA

0-10VDC V

16

46 ACTIVE DISPLAYS amp KEY FUNCTIONS

Power-up Initiation Display 461

Upon initial power-up Software Revision information will be displayed on the graphic display

for approximately 5 seconds

EQ-1

Software Rev XXXXX

Modbus Rev XXXXX

Process Display Descriptions 462

After power-up initialization the following information will appear on the graphic display

depending upon the options purchased

75˚F

75˚F

75˚F

000000

000000

000000

AutoZero

ACFM

High Alarm

ACFM

Low Alarm

ACFM

Flow Monitoring with an

Auto Zero Cycle

Flow Monitoring with a

High Alarm Condition

Flow Monitoring with a

Low Alarm Condition

Table 3 - Process Display Descriptions

Number Description

1 Process value

2 Air Flow temperature units in degree F or C

3 Flashing Asterisk indicates the CPU is functioning

4 Engineering units

5 Displayed during an AutoZero cycle

6 Indicating High Alarm Value has been exceeded (HighLow Alarm Option)

7 Indicating Low Alarm Value has been exceeded (HighLow Alarm Option)

12 3

4

6

7 5

17

Key Functions 463

The following figure and description identify the function of each Key

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

2

13

4

567

8

RP1 9

Figure 6 - Key Functions

Table 4 - Key Functions

Number Description

1 Enter Key - Allows a user to enter into the Field Menu enter into a selected menu item

or store into memory changes made to the program

2 Up Key - Allows the user to scroll up in the menu list to a selected item or increase digits

when making value changes

3 Right Key - When making changes to user values the Right Key allows the user to scroll

to the correct digit for changes

4 Down Key - Allows the user to scroll down in the menu list to a selected item or

decrease digits when making value changes

5 Left Key - When making changes to user values the Left Key allows the user to scroll to

the correct digit for changes

6

Escape Key - The Escape Key allows the user to back out of the menu to the Active

Display If a user starts to make a change and decides to cancel the change the Escape

Key will allow the user to return to the Active Display without making the change

7 Power Switch ndash Allows a user to turn power off to the AAON Signal Processor during

field wiring or modifications to the device

8 Lon Switch ndash Allows a user to send a unique Neuron device ID when connecting to a

LonWorks communication network

9 RP1 ndash Allows a user to adjust the display contrast

18

47 DISPLAY MENUS

Table 5 shows the Field Setup and Tech Configuration Menus The display will vary depending

upon the options purchased

Table 5 - Display Menus

Field Setup Menu

(Press ENTER Key)

Tech Configuration Menu

(Press UPDOWN Keys simultaneously)

(Enter Password number 1000)

(Press ENTER Key)

Operating Range Area Factor

Zero Calibration Min Calibration

Eng Units Span Calibration

Lockdown Temp Fixed Value

Flow Correction Altitude

AutoZero Output Calibration

Temp Comp Correction Coeff

Display Filter 4PT Flow Corr

Output Filter MAC Address (Optional)

Alarm Options (Optional) Instance Number (Optional)

Factory Defaults Modbus ID (Optional)

Baud Rate (Optional)

48 FIELD SETUP MENUS

To set parameters under the Field Setup Menus refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Field Setup Menu by depressing and holding the Enter Key for 5

seconds

Step 2 Once in the Field Setup Menu use the UpDown Keys to highlight the

required parameter for configuration as shown in Sections 481 through

4811 Press the Enter Key once to access the highlighted parameter

Menu

Step 3 Once in the parameter menu the parameter can be changed using

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Field

Setup Menu

Step 4 After all of the required parameters have been configured exit the Field

Setup Menu by pressing the ESC Key The Process Display (see Section

462) will then be displayed

19

Operating Range 481

The Operating Range allows the user to enter a value which will represent 100 of the process

output signal (5VDC 10VDC or 20mA) The Operating Range Value has been set by the

factory to equal 110 of the design supply flow rate unless this value is less than the Minimum

Full Scale Value allowed for the AAON Airflow Signal Processor The menu will display the

Minimum Full Scale Value allowed which is then entered as the Operating Range

Field Setup

Menu

Operating Range Operating Range

Zero Calibration ( ACFM )

Engineering Units (6000-12000)

Lockdown (010000)

Zero Pressure Calibration 482

The Zero Calibration Menu allows the user to perform a zero transducer calibration to eliminate

any transducer zero shift

(Caution Before performing a zero calibration disconnect the Total (High) and Static (Low)

pressure connections perform a zero calibration and then reconnect the Total and Static

pressure connections)

Field Setup

Menu

Operating Range Input Value CPU Taking

Zero Calibration (0000) Inch wc Samples

Engineering Units

Lockdown (Press Enter) (Please Wait)

Engineering Units 483

Table 6 lists the engineering units that are available for the user to select from for display

purposes Changing the engineering units will affect the process display and the alarm value

menus The default setting is ACFM

Field Setup

Menu

Operating Range Eng Units

Zero Calibration

Engineering Units (ACFM)

Lockdown

20

Table 6 - Engineering Units

Standard

Flow

Units

Actual

Flow

Units

SCFM ACFM

SCFH LS

SLS Am3S

Sm3S Am3M

Sm3M Am3HR

Sm3HR

Lockdown 484

Due to the high square root gain associated with very low delta p values the display and process

output are locked to a zero value until the input value reaches the specified Lockdown Value that

was entered Above the Lockdown Value the output is linear to air flow

4841 Lockdown Value

The Lockdown Value can be changed from 0 to 20 of Operating Range Value Lockdown

Values can be changed in 1 increments The recommended standard is 5

Field Setup

Menu

Operating Range Lockdown (0-20)

Zero Calibration (5)

Engineering Units Delay (0-20 sec)

Lockdown (2) Sec

4842 Lockdown Delay

The Lockdown Delay Menu allows the user to enter a lockdown time delay (0-20 seconds) that

will delay the display and output lockdown from occurring until the flow value or output value

has remained below the lockdown value for that duration

Field Setup

Menu

Operating Range Lockdown (0-20)

Zero Calibration (5)

Engineering Units Delay (0-20 sec)

Lockdown (2) Sec

21

Flow Correction 485

The Flow Correction Menu was incorporated into the AAON Airflow Signal Processor to give

the user an easy way to make corrections to the display and output without changing the

Operating Range Value entered by the factory or user The Flow Correction Menu would be

used to correct for a constant error from zero to the entered Operating Range Value

4851 Flow Correction (K-Factor)

If the user knows the change required to match the balancers reading select the K-Factor

Menu and enter this value for the K-Factor The minimum and maximum allowable K-Factor

Value is displayed in the K-Factor Menu

Field Setup

Menu

Flow Correction Flow Correction

AutoZero K-Factor K-Factor Range

Temp Comp (085 13)

Display Filter K-Factor Calc K=(01000)

4852 Flow Correction (K-Factor Calculator)

If the new K-factor Value needs to be calculated select the K-Factor Calc Menu Enter the

Displayed Value on the AAON Airflow Signal Processor and actual Measured Value press

Enter and the change will be calculated and stored as the new K-Factor Value

Field Setup

Menu

Flow Correction Displayed Value

AutoZero K-Factor (000000)

Temp Comp Measured Value

Display Filter K-Factor Calc (000000)

-FLOW CORRECTION EXAMPLE-

The balancer is consistently measuring a value of 9500 CFM which is 500 CFM less than the

10000 CFM value on the AAON Airflow Signal Processor display The user would then

perform the following math function Measured Value Displayed Value = K-Factor so 9500

CFM 10000 CFM = 0950 The user would enter 0950 for the K-Factor Flow Correction If

the K-Factor Calculator is used the K- Factor Flow Correction would automatically update the K

Factor

AutoZero 486

The AutoZero feature corrects any zero offset caused by large ambient temperature changes

22

4861 AutoZero Status

The AutoZero Status Menu allows the user to turn the AutoZero function ON or OFF

Field Setup

Menu

Flow Correction AZ Status AZ Status

AutoZero AZ Interval (ONOFF)

Temp Comp AZ Test Interval

Display Filter (ON)

4862 AutoZero Interval

The AutoZero Interval Menu allows the user to select the AutoZero Interval from once an hour

to once a day in 1 hour increments Use the UPDOWN keys to select the interval value Upon

device power up an AutoZero cycle will occur after 20 seconds

Field Setup

Menu

Flow Correction AZ Status AZ Interval

AutoZero AZ Interval (1 TO 24HR)

Temp Comp AZ Test Interval

Display Filter (01)HR

4863 AutoZero Test Interval

For troubleshooting or testing the AutoZero function the AutoZero Test Interval Menu allows

the user to select an Auto Zero test frequency of once a minute to once every 30 minutes in 1

minute increments Use the UPDOWN keys to select the interval value If AutoZero Test

Interval is turned ON for more than 60 minutes it will automatically default to OFF and the

AutoZero Interval (see Section 4862) will be reactivated

Field Setup

Menu

Flow Correction AZ Status AZ Test Interval

AutoZero AZ Interval (OFF)

Temp Comp AZ Test Interval Interval

Display Filter (1)Min

Temperature Compensation 487

The Temperature Compensation option compensates the flow and velocity signal for density

changes caused by variations in the process air temperature An input signal from AAON

Temperature Transmitter is required see Section 33 for proper temperature transmitter

connection and Section 452 for temperature input signal configuration

23

4871 Temperature Units

The Temperature Units Menu allows the user to select the appropriate temperature units for the

job The default setting is ordmF

Field Setup

Menu

Flow Correction Temperature Units Units

AutoZero Temperature Values (ordmF ordmC)

Temp Comp Temperature Input

Display Filter Fixed Value (ordmF)

4872 Temperature Values

The Temperature Values Menu allows the factory or user to set the minimum and maximum

temperature range values that represent the input signal from the external temperature transmitter

or the building automation system Since the AAON Temperature Transmitter has been supplied

the minimum and maximum temperature range values of -30degF to 130degF have been

preprogramed

Field Setup

Menu

Flow Correction Temperature Units Minimum Value

AutoZero Temperature Values (-030)

Temp Comp Temperature Input Maximum Value

Display Filter Fixed Value (130)

If the temperature values are changed from the factory settings and the new temperature values

cause the existing Operating Range Value to be outside the new calculated Minimum or

Maximum Full Scale Value the below Warning Message will appear and the Operating Range

will be reset to the new Maximum Full Scale Value by pressing Enter The display will

automatically jump to the Operating Range Menu allowing the user to enter a new Operating

Range Value This can be accomplished by performing the steps under Section 481 See

Temperature Range Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

24

Minimum Value

(-000)

Maximum Value

(000)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Min amp

Max Temperature

value and pressing the

Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Temperature Range Example-

Minimum Value

(-000)

Accepted

(100)

4873 Temperature Input

The Temperature Input Menu allows the user to select between three temperature input options

(Fixed Variable and Network) for the flow calculations Since the AAON Temperature

Transmitter has been supplied Variable has been selected If Fixed is selected the default

temperature value entered in the Fixed Value Menu (see Section 4874) is used If Net is

selected the temperature input signal is obtained through network communications The Net

option is only available if one of the communication options is ordered The temperature value

is only displayed on the LCD screen if the Temperature Input is set to Variable or Network

Field Setup

Menu

Flow Correction Temperature Units Temp Input

AutoZero Temperature Values (FixVarNet)

Temp Comp Temperature Input

Display Filter Fixed Value (Variable)

25

4874 Fixed Value

The Fixed Value Menu allows the user to enter a temperature value for the flow calculations

This value will not be displayed on the LCD screen

Field Setup

Menu

Flow Correction Temperature Units Fixed Value

AutoZero Temperature Values (˚F)

Temp Comp Temperature Input

Display Filter Fixed Value (+068)

Display Filter 488

The Display Filter Menu allows the user to adjust the Display Filter rolling average algorithm by

setting the Sample Interval Time value in seconds and the number of rolling average Sample

Counts The adjustment range of the Sample Interval Time is 010 to 655 seconds in 010

increments The Sample Count range is 0 to 150 Sample Counts The Display Filter is

independent of the Process Output Filter Value (See Section 489)

Field Setup

Menu

Flow Correction Sample Interval Time

AutoZero (005)sec

Temp Comp (0-150) Sample Count

Display Filter (010)

Process Output Filter 489

The Process Output Filter Menu allows the user to adjust the Process Output Filters rolling

average algorithm by setting the Sample Interval Time value in seconds and the number of

rolling average Sample Counts The adjustment range of the Sample Interval Time is 010 to

655 seconds in 010 increments The Sample Count range is 0 to 150 Sample Counts The

Process Output Filter is independent of the Display Filter Value (See Section 488)

Field Setup

Menu

Output Filter Sample Interval Time

Alarm Options (005)sec

Factory Defaults (0-150) Sample Count

(010)

26

HighLow Alarm Option 4810

The following menus for configuration of HighLow Alarms are only available if the HighLow

Alarm option is purchased

48101 Alarm Status

The Alarm Status allows the user to independently turn each alarm ON or OFF

Field Setup

Menu

Output Filter Alarm Status Low Alarm

Alarm Options Alarm Value (On)

Factory Defaults Alarm Delay High Alarm

(On)

48102 Alarm Values

The Alarm Value Menu allows the user to enter the Low or the High flow alarm value Alarm

values will be displayed in the same engineering units selected in the Eng Units Menu (see

Section 483)

- High Alarm Function The High Alarm activates if the flow exceeds the High Alarm

value and resets when the flow drops below the High Alarm Value

- Low Alarm Function The Low Alarm activates if the flow drops below the Low

Alarm Value and resets when the flow exceeds the Low Alarm Value

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Value

Alarm Options Alarm Value (000000)

Factory Defaults Alarm Delay Hi Alarm Value

(100000)

48103 Alarm Delay

The Alarm Delay Menu allows the user to enter an alarm delay of 0 to 999 seconds before an

alarm will be activated The alarm will be reset without a delay

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Delay

Alarm Options Alarm Value (000)Seconds

Factory Defaults Alarm Delay Hi Alarm Delay

(000)Seconds

27

Factory Defaults 4811

If parameter configuration changes have been made incorrectly to the AAON Airflow Signal

Processor all device settings can be restored to the original AAON factory settings by selecting

YES and pressing Enter in both the Set To Factory Defaults Menu and the Verify Set To Factory

Defaults Menu (see Table 7 below for a list of Saved Settings)

Field Setup

Menu

Output Filter Set To Verify Set To

Alarm Options Factory Defaults Factory Defaults

Factory Defaults

(No) (No)

Table 7 - Factory Defaults

Item Saved Setting Item Saved Setting

1 All Factory Calibration Points (12) 14 MAC Address

2 Area Factor 15 Instance Number

3 Operating Range 16 Engineering Units

4 4 Pt Flow Correction 17 Display Filter Values

5 Altitude 18 Output Filter

6 K-Factor 19 DP Display Format

7 Lockdown amp Delay Values 20 Output Calibration

8 Flow Correction 21 AutoZero Status

9 Flow Coefficient 22 AutoZero Interval

10 Min amp Max Temp Range Values 23 Temp Units

11 Alarm Status 24 Temp Input

12 Alarm Values 25 Temp Fixed Value

13 Alarm Delay 26 Baud Rate

28

49 TECH CONFIGURATION MENUS

To set parameters under the Tech Configuration Menu refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 491

through 4911 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

Area Factor 491

To convert the differential pressure signal from the AAON Airflow Station to a flow value the

Area Factor associated with the AAON Airflow Station has been preprogramed by the factory

If the Area Factor needs to be checked or reconfigured the correct Area Factor for the AAON

Airflow Station can be found on the AAON Airflow Station product label installed in the air

handling unit

Tech Config

Password 1000

Area Factor Area Factor

Min Calibration (FT2)

Span Calibration

Altitude (001000)

29

If the Area Factor is reconfigured and the new Area Factor causes the existing Operating Range

Value to be outside the new calculated Minimum or Maximum Full Scale Value the below

Warning Message will appear and the Operating Range will be reset to the new Maximum Full

Scale Value by pressing Enter The display will automatically jump to the Operating Range

Menu allowing the user to enter a new Operating Range Value This can be accomplished by

performing the steps under Section 481 See Area Factor Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Area Factor

(FT )

(001000)

Area Factor

(FT )

Accepted

(001200)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Area

Factor and pressing

the Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Area Factor Example-

2

2

30

Minimum Calibration 492

The Minimum Calibration Menu allows a user to perform a minimum transducer calibration

This value will be placed in a different memory location and used until a Return to Factory

Defaults is selected (see Section 4811)

(Caution Before performing a minimum calibration disconnect the Total (High) and Static

(Low) Pressure connections perform a minimum calibration and then reconnect the Total

and Static Pressure connections)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00000) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Span Calibration 493

The Span Calibration Menu allows the user to perform a span transducer calibration to eliminate

any possible transducer drift This value will be placed in a different memory location than the

Factory Span memory location and used until a Return to Factory Defaults is selected (see

Section 4811)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00570) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Altitude 494

The Altitude Menu allows the user to enter the specific altitude for the job for the density

calculations the job specific site Altitude has been preprogramed by the factory

Tech Config

Password 1000

Area Factor Altitude

Min Calibration

Span Calibration (0000)Ft

Altitude

31

If the Altitude is changed from the factory setting and the new Altitude causes the existing

Operating Range Value to be outside the new calculated Minimum or Maximum Full Scale

Value the below Warning Message will appear and the Operating Range will be reset to the new

Maximum Full Scale Value by pressing Enter The display will automatically jump to the

Operating Range Menu allowing the user to enter a new Operating Range Value This can be

accomplished by performing the steps under Section 481 See Altitude Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Altitude

(0000)Ft

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Altitude

and pressing the Enter

button will calculate

new Min amp Max Op

Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Altitude Example-

Altitude

Accepted

(0100)Ft

32

Process Output Calibration 495

4951 Minimum Calibration

The Minimum Calibration Menu allows the user to make output zero adjustments Monitor the

output and with each Up or Down key depression the output will increase or decrease by

001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

4952 Span Calibration

The Span Calibration Menu allows the user to make output span adjustments Span adjustments

require a low pressure air source adjusted to the Full Scale Value shown on the side label

Monitor the output and with each Up or Down button depression the output will increase or

decrease by 001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

Probe Coefficient 496

The Probe Correction Coefficient Menu allows the user to modify the formula constant of

109670 used for non-amplified Pitot-type flow sensors

Tech Config

Password 1000

Output Calibration Correction Coeff

Correction Coeff Probe

4PT Flow Corr (109670)

MAC Address (00109670)

33

Four Point Flow Correction 497

The Four Point Flow Correction Menu allows the user to make corrections to the display and

output signal at 20 increments between 20 and 80 of the Operating Range Value entered

The Displayed Value is a fixed value determined by the percentage of Operating Range The

Measured Value is the value determined by an independent balancerrsquos reading

Tech Config

Password 1000

Output Calibration 80000 CFM Displayed Value

Correction Coeff 60000 CFM 80000

4PT Flow Corr 40000 CFM Measured Value

MAC Address 20000 CFM 79500

80000 CFM Displayed Value

60000 CFM 60000

40000 CFM Measured Value

20000 CFM 60500

80000 CFM Displayed Value

60000 CFM 40000

40000 CFM Measured Value

20000 CFM 40100

80000 CFM Displayed Value

60000 CFM 20000

40000 CFM Measured Value

20000 CFM 19500

MAC Address (BACnet Communication Option) 498

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network The default is 002 For

additional information refer to Section 411

Tech Config

Password 1000

Output Calibration MAC Address

Correction Coeff (Range = 02 to 254)

4PT Flow Corr

MAC Address (002)

34

Instance Number (BACnet Communication Option) 499

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The default is 1002 For

additional information refer to Section 411

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (Default = 1002)

Instance Number

Modbus ID (01002)

Modbus ID (Modbus Communication Option) 4910

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network The default is 002 For

communication with WattMaster Controls the Modbus ID has been set by the factory to 009 for

outside airflow applications For additional information refer to the Section 411

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

Baud Rate (BACnet amp Modbus Communication Options) 4911

The Baud Rate Menu allows the user to set a unique network baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate Modbus communications supports

96 192 384 576 and 1152 Kbps baud rate The default is 384 Kbps For communication

with WattMaster Controls the Baud Rate has been set by the factory to 96 Kbps For additional

information refer to Section 411

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

35

410 WARNING MESSAGES

Input Pressure Overrange Message 4101

If the input pressure exceeds the entered Operating Range Value the following message will

appear on the display It will alternate between the process display and the error message until

the input falls below the Operating Range Value

- Caution -

Input Beyond

Operating Range

Selected

Transducer Calibration Message 4102

If during a transducer zero or span calibration process the transducer output pressure value

measured exceeds plusmn20 of the expected value the following message will appear on the display

Once the Enter button is pressed the display returns to the previous calibration menu

Value entered is

Outside Factory

set limits

(Press Enter)

Operating Range Message 4103

If the new values entered for Temperature Compensation Area Factor or Altitude (see Sections

487 491 and 494) causes the Operating Range Value to exceed the new calculated

Maximum Full Scale Value the following message will appear on the display

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

New Operating Range Message 4104

If a user enters a new Operating Range Value the following message will appear on the display

notifying the user that if any 4 PT Flow Correction Values (see Section 497) were previously

entered they will be reset The message allows the user to confirm that the Operating Range

change should be made To complete the Operating Range change the user must use the

UPDown buttons to change the NO to a YES and press the ENTER button

Value will

Reset 4PT

Flow Correction

Values

Make the Change

(NO)

(Press Enter)

36

411 NETWORK COMMUNICATION

The AAON Airflow Signal Processor can be ordered with BACnet Modbus or LonWorks

Communication For BACnet Communication the AAON Airflow Signal Processors utilize

MSTP (Master SlaveToken Passing) BACnet type protocol BACnet is implemented using

EIA-485 signaling standards through a shielded twisted pair wire operating at a baud rate of 96

Kbps to 768 Kbps Each device has a unique MAC Address ranging from 2 to 127 Refer to

Section 4113 for BACnet Protocol Implementation Conformance Statements (PICS) For

Modbus Communication the AAON Airflow Signal Processors utilize the Modbus ndash RTU Slave

protocol using EIA-485 signaling standards through a shielded twisted pair wire operating at a

baud rate of 96 Kbps to 1152 Kbps Each device has a unique Modbus ID ranging from 1 to

254 Refer to Section 4114 for Modbus software configuration parameters For LonWorks

Communication each AAON Airflow Signal Processor has a unique Neuron Chip ID which is

loaded on the network by pressing a service switch located on the main board (see Section

4111 Figure 7) The LonWorks network utilizes a shielded twisted pair wire operating at a

fixed baud rate of 78 Kbps Refer to Section 4115 for LonWorks network variables

Sections 4111 and 4112 contain procedures for electrical connection of the AAON Airflow

Signal Processor to the network and for configuring the required communication parameters

Electrical Connection 4111

The following procedure outlines the steps for installing the interface wiring for network

communication Network wire should be low capacitance shielded 22 or 24 AWG twisted pair

with PVC jacket such as Belden Part numbers 9841 3105A or equivalent

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Verify that the Power Switch (S3) is in the OFF position and install the interface

wiring for Pins 9 and 10 as shown in Figure 7 If multiple AAON Airflow Signal

Processors will be connected to the same network see Figure 8 for connecting

multiple devices For network systems that require all devices to have a common

signal ground refer to Figure 9 for electrical connection The J2 electrical

connector has a removable terminal block for ease of installing the interface

wiring

Step 4 For proper operation of BACnet and Modbus communication networks the

device that is electrically installed at the end of the network may require the

Terminator Switch be moved to the ON position to prevent line and data

reflection If Terminator is required it must be applied to both physical ends of

the network All other devices should have the Terminator Switch in the OFF

position The communication board is located on the back side of the main

AAON Airflow Signal Processor board See Figure 10 below for Terminator

Switch location on the communication board

Step 5 For LonWorks Communication refer to Figure 7 for the location of the Lon

Service Pin

37

Step 6 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 7 Configure the required parameters as outlined in Section 4112

Step 8 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

RP1

S3

NETWORK

COMMUNICATION+

-

LON

SERVICE PIN

Figure 7 - Network Communication Electrical Connection

38

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

AAON AIRFLOW

SIGNAL PROCESSOR

CONNECT ONLY ONE END OF SHIELD

WIRE TO EARTH GROUND AS SHOWN

SET TERMINATOR SWITCH

ON IF REQUIRED

NETWORK

COMMUNICATIONS

NETWORK

CONNECT SHIELD

WIRES TOGETHER

CONNECT SHIELD

WIRES TOGETHER

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not

Requiring Common Signal Grounds

Note If using two conductor communication wire use the shield wire to connect all device signal grounds together as shown in the figure below If using three conductor communication wire use the 3rd conductor to connect all device signal grounds together and connect one side of the shield to earth ground

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

SIGNAL

GROUND

8

J2

SIGNAL

GROUND

8

J28

J2

USE SHIELD WIRE OR 3RD CONDUCTOR TO

CONNECT DEVICE SIGNAL GROUND TO

NETWORK SIGNAL GROUND

SET TERMINATOR SWITCH

ON IF REQUIRED

AAON AIRFLOW

SIGNAL PROCESSOR

NETWORK

COMMUNICATIONS

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

SIGNAL

GROUND

SIGNAL

GROUND

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds

39

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location

COMMUNICATION BOARD ID

BOARD SERIAL NO

40

Parameter Configuration 4112

If BACnet or Modbus communication is ordered the associated settings will need to be

configured with the exception of Modbus communication with WattMaster Controls which has

been configured at the factory To set the parameters refer to the following procedure below

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 41121

through 41124 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

41121 MAC Address (BACnet Communication Option)

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network Each AAON Airflow Signal

Processor must have a unique MAC Address assigned ranging from 2 to 127

Tech Config

Password 1000

4PT Flow Corr MAC Address

MAC Address (Range = 02 to 254)

Instance Number

Modbus ID (002)

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 14: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

14

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROCOUTPUT

mA

V

10V

5V

(24VACDC)

POWER SUPPLY

ANALOG RECEIVING DEVICE

PROCESS OUTPUT

S1S2 S4

+

-

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

SWITCH POSITIONS

SHOWN IN BLACK

S1 POSITION

INDICATING 4-20mA

TEMPERATURE INPUT

S2 AND S4 POSITIONS

INDICATING 0-10VDC

PROCESS OUTPUT

RP1

S3

E-BUS DISTRIBUTION MODULE

+-

AAON

TEMPERATURE

TRANSMITTER

(4-20mA LOOP POWERED)+

-

- COMM

+ COMM

GND

THE SHIELDING WIRE SHOULD BE USED TO

CONNECT WATTMASTER GROUND TO AIRFLOW

SIGNAL PROCESSOR GROUND

Figure 4 - Electrical Connection with Wattmaster Controls

15

J1 J2

TOTAL

CONNECTION

STATIC

CONNECTION

TOTAL PRESSURE CONECTION

AAON AIRFLOW STATION

STATIC PRESSURE CONNECTION

AAON AIRFLOW STATION

Figure 5 - Pneumatic Connections

45 INPUTOUTPUT SET-UP

If input or output configuration changes are required refer to the Tables 1 and 2 in the sections

below and Figure 3 in Section 44

Process Output 451

If controls are provided by AAON the process output has been set by the factory for input to the

specific controller otherwise the default is 0-10VDC To change the output configuration set

the S2 amp S4 switches as follows

Table 1 - Process Output Switch Configuration

Process Output Range S2 S4

Current 4-20mA NA mA

Voltage 0-10VDC 10V V

Voltage 0-5VDC 5V V

Temperature Input 452

Since the AAON Temperature Transmitter has been provided the temperature input has been set

by the factory for 4-20mA To change the input configuration set the S1 switch as follows

Table 2 - Temperature Input Switch

Configuration

Temperature Input S1 Switch Selection

4-20mA mA

0-10VDC V

16

46 ACTIVE DISPLAYS amp KEY FUNCTIONS

Power-up Initiation Display 461

Upon initial power-up Software Revision information will be displayed on the graphic display

for approximately 5 seconds

EQ-1

Software Rev XXXXX

Modbus Rev XXXXX

Process Display Descriptions 462

After power-up initialization the following information will appear on the graphic display

depending upon the options purchased

75˚F

75˚F

75˚F

000000

000000

000000

AutoZero

ACFM

High Alarm

ACFM

Low Alarm

ACFM

Flow Monitoring with an

Auto Zero Cycle

Flow Monitoring with a

High Alarm Condition

Flow Monitoring with a

Low Alarm Condition

Table 3 - Process Display Descriptions

Number Description

1 Process value

2 Air Flow temperature units in degree F or C

3 Flashing Asterisk indicates the CPU is functioning

4 Engineering units

5 Displayed during an AutoZero cycle

6 Indicating High Alarm Value has been exceeded (HighLow Alarm Option)

7 Indicating Low Alarm Value has been exceeded (HighLow Alarm Option)

12 3

4

6

7 5

17

Key Functions 463

The following figure and description identify the function of each Key

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

2

13

4

567

8

RP1 9

Figure 6 - Key Functions

Table 4 - Key Functions

Number Description

1 Enter Key - Allows a user to enter into the Field Menu enter into a selected menu item

or store into memory changes made to the program

2 Up Key - Allows the user to scroll up in the menu list to a selected item or increase digits

when making value changes

3 Right Key - When making changes to user values the Right Key allows the user to scroll

to the correct digit for changes

4 Down Key - Allows the user to scroll down in the menu list to a selected item or

decrease digits when making value changes

5 Left Key - When making changes to user values the Left Key allows the user to scroll to

the correct digit for changes

6

Escape Key - The Escape Key allows the user to back out of the menu to the Active

Display If a user starts to make a change and decides to cancel the change the Escape

Key will allow the user to return to the Active Display without making the change

7 Power Switch ndash Allows a user to turn power off to the AAON Signal Processor during

field wiring or modifications to the device

8 Lon Switch ndash Allows a user to send a unique Neuron device ID when connecting to a

LonWorks communication network

9 RP1 ndash Allows a user to adjust the display contrast

18

47 DISPLAY MENUS

Table 5 shows the Field Setup and Tech Configuration Menus The display will vary depending

upon the options purchased

Table 5 - Display Menus

Field Setup Menu

(Press ENTER Key)

Tech Configuration Menu

(Press UPDOWN Keys simultaneously)

(Enter Password number 1000)

(Press ENTER Key)

Operating Range Area Factor

Zero Calibration Min Calibration

Eng Units Span Calibration

Lockdown Temp Fixed Value

Flow Correction Altitude

AutoZero Output Calibration

Temp Comp Correction Coeff

Display Filter 4PT Flow Corr

Output Filter MAC Address (Optional)

Alarm Options (Optional) Instance Number (Optional)

Factory Defaults Modbus ID (Optional)

Baud Rate (Optional)

48 FIELD SETUP MENUS

To set parameters under the Field Setup Menus refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Field Setup Menu by depressing and holding the Enter Key for 5

seconds

Step 2 Once in the Field Setup Menu use the UpDown Keys to highlight the

required parameter for configuration as shown in Sections 481 through

4811 Press the Enter Key once to access the highlighted parameter

Menu

Step 3 Once in the parameter menu the parameter can be changed using

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Field

Setup Menu

Step 4 After all of the required parameters have been configured exit the Field

Setup Menu by pressing the ESC Key The Process Display (see Section

462) will then be displayed

19

Operating Range 481

The Operating Range allows the user to enter a value which will represent 100 of the process

output signal (5VDC 10VDC or 20mA) The Operating Range Value has been set by the

factory to equal 110 of the design supply flow rate unless this value is less than the Minimum

Full Scale Value allowed for the AAON Airflow Signal Processor The menu will display the

Minimum Full Scale Value allowed which is then entered as the Operating Range

Field Setup

Menu

Operating Range Operating Range

Zero Calibration ( ACFM )

Engineering Units (6000-12000)

Lockdown (010000)

Zero Pressure Calibration 482

The Zero Calibration Menu allows the user to perform a zero transducer calibration to eliminate

any transducer zero shift

(Caution Before performing a zero calibration disconnect the Total (High) and Static (Low)

pressure connections perform a zero calibration and then reconnect the Total and Static

pressure connections)

Field Setup

Menu

Operating Range Input Value CPU Taking

Zero Calibration (0000) Inch wc Samples

Engineering Units

Lockdown (Press Enter) (Please Wait)

Engineering Units 483

Table 6 lists the engineering units that are available for the user to select from for display

purposes Changing the engineering units will affect the process display and the alarm value

menus The default setting is ACFM

Field Setup

Menu

Operating Range Eng Units

Zero Calibration

Engineering Units (ACFM)

Lockdown

20

Table 6 - Engineering Units

Standard

Flow

Units

Actual

Flow

Units

SCFM ACFM

SCFH LS

SLS Am3S

Sm3S Am3M

Sm3M Am3HR

Sm3HR

Lockdown 484

Due to the high square root gain associated with very low delta p values the display and process

output are locked to a zero value until the input value reaches the specified Lockdown Value that

was entered Above the Lockdown Value the output is linear to air flow

4841 Lockdown Value

The Lockdown Value can be changed from 0 to 20 of Operating Range Value Lockdown

Values can be changed in 1 increments The recommended standard is 5

Field Setup

Menu

Operating Range Lockdown (0-20)

Zero Calibration (5)

Engineering Units Delay (0-20 sec)

Lockdown (2) Sec

4842 Lockdown Delay

The Lockdown Delay Menu allows the user to enter a lockdown time delay (0-20 seconds) that

will delay the display and output lockdown from occurring until the flow value or output value

has remained below the lockdown value for that duration

Field Setup

Menu

Operating Range Lockdown (0-20)

Zero Calibration (5)

Engineering Units Delay (0-20 sec)

Lockdown (2) Sec

21

Flow Correction 485

The Flow Correction Menu was incorporated into the AAON Airflow Signal Processor to give

the user an easy way to make corrections to the display and output without changing the

Operating Range Value entered by the factory or user The Flow Correction Menu would be

used to correct for a constant error from zero to the entered Operating Range Value

4851 Flow Correction (K-Factor)

If the user knows the change required to match the balancers reading select the K-Factor

Menu and enter this value for the K-Factor The minimum and maximum allowable K-Factor

Value is displayed in the K-Factor Menu

Field Setup

Menu

Flow Correction Flow Correction

AutoZero K-Factor K-Factor Range

Temp Comp (085 13)

Display Filter K-Factor Calc K=(01000)

4852 Flow Correction (K-Factor Calculator)

If the new K-factor Value needs to be calculated select the K-Factor Calc Menu Enter the

Displayed Value on the AAON Airflow Signal Processor and actual Measured Value press

Enter and the change will be calculated and stored as the new K-Factor Value

Field Setup

Menu

Flow Correction Displayed Value

AutoZero K-Factor (000000)

Temp Comp Measured Value

Display Filter K-Factor Calc (000000)

-FLOW CORRECTION EXAMPLE-

The balancer is consistently measuring a value of 9500 CFM which is 500 CFM less than the

10000 CFM value on the AAON Airflow Signal Processor display The user would then

perform the following math function Measured Value Displayed Value = K-Factor so 9500

CFM 10000 CFM = 0950 The user would enter 0950 for the K-Factor Flow Correction If

the K-Factor Calculator is used the K- Factor Flow Correction would automatically update the K

Factor

AutoZero 486

The AutoZero feature corrects any zero offset caused by large ambient temperature changes

22

4861 AutoZero Status

The AutoZero Status Menu allows the user to turn the AutoZero function ON or OFF

Field Setup

Menu

Flow Correction AZ Status AZ Status

AutoZero AZ Interval (ONOFF)

Temp Comp AZ Test Interval

Display Filter (ON)

4862 AutoZero Interval

The AutoZero Interval Menu allows the user to select the AutoZero Interval from once an hour

to once a day in 1 hour increments Use the UPDOWN keys to select the interval value Upon

device power up an AutoZero cycle will occur after 20 seconds

Field Setup

Menu

Flow Correction AZ Status AZ Interval

AutoZero AZ Interval (1 TO 24HR)

Temp Comp AZ Test Interval

Display Filter (01)HR

4863 AutoZero Test Interval

For troubleshooting or testing the AutoZero function the AutoZero Test Interval Menu allows

the user to select an Auto Zero test frequency of once a minute to once every 30 minutes in 1

minute increments Use the UPDOWN keys to select the interval value If AutoZero Test

Interval is turned ON for more than 60 minutes it will automatically default to OFF and the

AutoZero Interval (see Section 4862) will be reactivated

Field Setup

Menu

Flow Correction AZ Status AZ Test Interval

AutoZero AZ Interval (OFF)

Temp Comp AZ Test Interval Interval

Display Filter (1)Min

Temperature Compensation 487

The Temperature Compensation option compensates the flow and velocity signal for density

changes caused by variations in the process air temperature An input signal from AAON

Temperature Transmitter is required see Section 33 for proper temperature transmitter

connection and Section 452 for temperature input signal configuration

23

4871 Temperature Units

The Temperature Units Menu allows the user to select the appropriate temperature units for the

job The default setting is ordmF

Field Setup

Menu

Flow Correction Temperature Units Units

AutoZero Temperature Values (ordmF ordmC)

Temp Comp Temperature Input

Display Filter Fixed Value (ordmF)

4872 Temperature Values

The Temperature Values Menu allows the factory or user to set the minimum and maximum

temperature range values that represent the input signal from the external temperature transmitter

or the building automation system Since the AAON Temperature Transmitter has been supplied

the minimum and maximum temperature range values of -30degF to 130degF have been

preprogramed

Field Setup

Menu

Flow Correction Temperature Units Minimum Value

AutoZero Temperature Values (-030)

Temp Comp Temperature Input Maximum Value

Display Filter Fixed Value (130)

If the temperature values are changed from the factory settings and the new temperature values

cause the existing Operating Range Value to be outside the new calculated Minimum or

Maximum Full Scale Value the below Warning Message will appear and the Operating Range

will be reset to the new Maximum Full Scale Value by pressing Enter The display will

automatically jump to the Operating Range Menu allowing the user to enter a new Operating

Range Value This can be accomplished by performing the steps under Section 481 See

Temperature Range Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

24

Minimum Value

(-000)

Maximum Value

(000)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Min amp

Max Temperature

value and pressing the

Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Temperature Range Example-

Minimum Value

(-000)

Accepted

(100)

4873 Temperature Input

The Temperature Input Menu allows the user to select between three temperature input options

(Fixed Variable and Network) for the flow calculations Since the AAON Temperature

Transmitter has been supplied Variable has been selected If Fixed is selected the default

temperature value entered in the Fixed Value Menu (see Section 4874) is used If Net is

selected the temperature input signal is obtained through network communications The Net

option is only available if one of the communication options is ordered The temperature value

is only displayed on the LCD screen if the Temperature Input is set to Variable or Network

Field Setup

Menu

Flow Correction Temperature Units Temp Input

AutoZero Temperature Values (FixVarNet)

Temp Comp Temperature Input

Display Filter Fixed Value (Variable)

25

4874 Fixed Value

The Fixed Value Menu allows the user to enter a temperature value for the flow calculations

This value will not be displayed on the LCD screen

Field Setup

Menu

Flow Correction Temperature Units Fixed Value

AutoZero Temperature Values (˚F)

Temp Comp Temperature Input

Display Filter Fixed Value (+068)

Display Filter 488

The Display Filter Menu allows the user to adjust the Display Filter rolling average algorithm by

setting the Sample Interval Time value in seconds and the number of rolling average Sample

Counts The adjustment range of the Sample Interval Time is 010 to 655 seconds in 010

increments The Sample Count range is 0 to 150 Sample Counts The Display Filter is

independent of the Process Output Filter Value (See Section 489)

Field Setup

Menu

Flow Correction Sample Interval Time

AutoZero (005)sec

Temp Comp (0-150) Sample Count

Display Filter (010)

Process Output Filter 489

The Process Output Filter Menu allows the user to adjust the Process Output Filters rolling

average algorithm by setting the Sample Interval Time value in seconds and the number of

rolling average Sample Counts The adjustment range of the Sample Interval Time is 010 to

655 seconds in 010 increments The Sample Count range is 0 to 150 Sample Counts The

Process Output Filter is independent of the Display Filter Value (See Section 488)

Field Setup

Menu

Output Filter Sample Interval Time

Alarm Options (005)sec

Factory Defaults (0-150) Sample Count

(010)

26

HighLow Alarm Option 4810

The following menus for configuration of HighLow Alarms are only available if the HighLow

Alarm option is purchased

48101 Alarm Status

The Alarm Status allows the user to independently turn each alarm ON or OFF

Field Setup

Menu

Output Filter Alarm Status Low Alarm

Alarm Options Alarm Value (On)

Factory Defaults Alarm Delay High Alarm

(On)

48102 Alarm Values

The Alarm Value Menu allows the user to enter the Low or the High flow alarm value Alarm

values will be displayed in the same engineering units selected in the Eng Units Menu (see

Section 483)

- High Alarm Function The High Alarm activates if the flow exceeds the High Alarm

value and resets when the flow drops below the High Alarm Value

- Low Alarm Function The Low Alarm activates if the flow drops below the Low

Alarm Value and resets when the flow exceeds the Low Alarm Value

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Value

Alarm Options Alarm Value (000000)

Factory Defaults Alarm Delay Hi Alarm Value

(100000)

48103 Alarm Delay

The Alarm Delay Menu allows the user to enter an alarm delay of 0 to 999 seconds before an

alarm will be activated The alarm will be reset without a delay

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Delay

Alarm Options Alarm Value (000)Seconds

Factory Defaults Alarm Delay Hi Alarm Delay

(000)Seconds

27

Factory Defaults 4811

If parameter configuration changes have been made incorrectly to the AAON Airflow Signal

Processor all device settings can be restored to the original AAON factory settings by selecting

YES and pressing Enter in both the Set To Factory Defaults Menu and the Verify Set To Factory

Defaults Menu (see Table 7 below for a list of Saved Settings)

Field Setup

Menu

Output Filter Set To Verify Set To

Alarm Options Factory Defaults Factory Defaults

Factory Defaults

(No) (No)

Table 7 - Factory Defaults

Item Saved Setting Item Saved Setting

1 All Factory Calibration Points (12) 14 MAC Address

2 Area Factor 15 Instance Number

3 Operating Range 16 Engineering Units

4 4 Pt Flow Correction 17 Display Filter Values

5 Altitude 18 Output Filter

6 K-Factor 19 DP Display Format

7 Lockdown amp Delay Values 20 Output Calibration

8 Flow Correction 21 AutoZero Status

9 Flow Coefficient 22 AutoZero Interval

10 Min amp Max Temp Range Values 23 Temp Units

11 Alarm Status 24 Temp Input

12 Alarm Values 25 Temp Fixed Value

13 Alarm Delay 26 Baud Rate

28

49 TECH CONFIGURATION MENUS

To set parameters under the Tech Configuration Menu refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 491

through 4911 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

Area Factor 491

To convert the differential pressure signal from the AAON Airflow Station to a flow value the

Area Factor associated with the AAON Airflow Station has been preprogramed by the factory

If the Area Factor needs to be checked or reconfigured the correct Area Factor for the AAON

Airflow Station can be found on the AAON Airflow Station product label installed in the air

handling unit

Tech Config

Password 1000

Area Factor Area Factor

Min Calibration (FT2)

Span Calibration

Altitude (001000)

29

If the Area Factor is reconfigured and the new Area Factor causes the existing Operating Range

Value to be outside the new calculated Minimum or Maximum Full Scale Value the below

Warning Message will appear and the Operating Range will be reset to the new Maximum Full

Scale Value by pressing Enter The display will automatically jump to the Operating Range

Menu allowing the user to enter a new Operating Range Value This can be accomplished by

performing the steps under Section 481 See Area Factor Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Area Factor

(FT )

(001000)

Area Factor

(FT )

Accepted

(001200)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Area

Factor and pressing

the Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Area Factor Example-

2

2

30

Minimum Calibration 492

The Minimum Calibration Menu allows a user to perform a minimum transducer calibration

This value will be placed in a different memory location and used until a Return to Factory

Defaults is selected (see Section 4811)

(Caution Before performing a minimum calibration disconnect the Total (High) and Static

(Low) Pressure connections perform a minimum calibration and then reconnect the Total

and Static Pressure connections)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00000) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Span Calibration 493

The Span Calibration Menu allows the user to perform a span transducer calibration to eliminate

any possible transducer drift This value will be placed in a different memory location than the

Factory Span memory location and used until a Return to Factory Defaults is selected (see

Section 4811)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00570) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Altitude 494

The Altitude Menu allows the user to enter the specific altitude for the job for the density

calculations the job specific site Altitude has been preprogramed by the factory

Tech Config

Password 1000

Area Factor Altitude

Min Calibration

Span Calibration (0000)Ft

Altitude

31

If the Altitude is changed from the factory setting and the new Altitude causes the existing

Operating Range Value to be outside the new calculated Minimum or Maximum Full Scale

Value the below Warning Message will appear and the Operating Range will be reset to the new

Maximum Full Scale Value by pressing Enter The display will automatically jump to the

Operating Range Menu allowing the user to enter a new Operating Range Value This can be

accomplished by performing the steps under Section 481 See Altitude Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Altitude

(0000)Ft

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Altitude

and pressing the Enter

button will calculate

new Min amp Max Op

Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Altitude Example-

Altitude

Accepted

(0100)Ft

32

Process Output Calibration 495

4951 Minimum Calibration

The Minimum Calibration Menu allows the user to make output zero adjustments Monitor the

output and with each Up or Down key depression the output will increase or decrease by

001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

4952 Span Calibration

The Span Calibration Menu allows the user to make output span adjustments Span adjustments

require a low pressure air source adjusted to the Full Scale Value shown on the side label

Monitor the output and with each Up or Down button depression the output will increase or

decrease by 001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

Probe Coefficient 496

The Probe Correction Coefficient Menu allows the user to modify the formula constant of

109670 used for non-amplified Pitot-type flow sensors

Tech Config

Password 1000

Output Calibration Correction Coeff

Correction Coeff Probe

4PT Flow Corr (109670)

MAC Address (00109670)

33

Four Point Flow Correction 497

The Four Point Flow Correction Menu allows the user to make corrections to the display and

output signal at 20 increments between 20 and 80 of the Operating Range Value entered

The Displayed Value is a fixed value determined by the percentage of Operating Range The

Measured Value is the value determined by an independent balancerrsquos reading

Tech Config

Password 1000

Output Calibration 80000 CFM Displayed Value

Correction Coeff 60000 CFM 80000

4PT Flow Corr 40000 CFM Measured Value

MAC Address 20000 CFM 79500

80000 CFM Displayed Value

60000 CFM 60000

40000 CFM Measured Value

20000 CFM 60500

80000 CFM Displayed Value

60000 CFM 40000

40000 CFM Measured Value

20000 CFM 40100

80000 CFM Displayed Value

60000 CFM 20000

40000 CFM Measured Value

20000 CFM 19500

MAC Address (BACnet Communication Option) 498

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network The default is 002 For

additional information refer to Section 411

Tech Config

Password 1000

Output Calibration MAC Address

Correction Coeff (Range = 02 to 254)

4PT Flow Corr

MAC Address (002)

34

Instance Number (BACnet Communication Option) 499

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The default is 1002 For

additional information refer to Section 411

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (Default = 1002)

Instance Number

Modbus ID (01002)

Modbus ID (Modbus Communication Option) 4910

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network The default is 002 For

communication with WattMaster Controls the Modbus ID has been set by the factory to 009 for

outside airflow applications For additional information refer to the Section 411

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

Baud Rate (BACnet amp Modbus Communication Options) 4911

The Baud Rate Menu allows the user to set a unique network baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate Modbus communications supports

96 192 384 576 and 1152 Kbps baud rate The default is 384 Kbps For communication

with WattMaster Controls the Baud Rate has been set by the factory to 96 Kbps For additional

information refer to Section 411

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

35

410 WARNING MESSAGES

Input Pressure Overrange Message 4101

If the input pressure exceeds the entered Operating Range Value the following message will

appear on the display It will alternate between the process display and the error message until

the input falls below the Operating Range Value

- Caution -

Input Beyond

Operating Range

Selected

Transducer Calibration Message 4102

If during a transducer zero or span calibration process the transducer output pressure value

measured exceeds plusmn20 of the expected value the following message will appear on the display

Once the Enter button is pressed the display returns to the previous calibration menu

Value entered is

Outside Factory

set limits

(Press Enter)

Operating Range Message 4103

If the new values entered for Temperature Compensation Area Factor or Altitude (see Sections

487 491 and 494) causes the Operating Range Value to exceed the new calculated

Maximum Full Scale Value the following message will appear on the display

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

New Operating Range Message 4104

If a user enters a new Operating Range Value the following message will appear on the display

notifying the user that if any 4 PT Flow Correction Values (see Section 497) were previously

entered they will be reset The message allows the user to confirm that the Operating Range

change should be made To complete the Operating Range change the user must use the

UPDown buttons to change the NO to a YES and press the ENTER button

Value will

Reset 4PT

Flow Correction

Values

Make the Change

(NO)

(Press Enter)

36

411 NETWORK COMMUNICATION

The AAON Airflow Signal Processor can be ordered with BACnet Modbus or LonWorks

Communication For BACnet Communication the AAON Airflow Signal Processors utilize

MSTP (Master SlaveToken Passing) BACnet type protocol BACnet is implemented using

EIA-485 signaling standards through a shielded twisted pair wire operating at a baud rate of 96

Kbps to 768 Kbps Each device has a unique MAC Address ranging from 2 to 127 Refer to

Section 4113 for BACnet Protocol Implementation Conformance Statements (PICS) For

Modbus Communication the AAON Airflow Signal Processors utilize the Modbus ndash RTU Slave

protocol using EIA-485 signaling standards through a shielded twisted pair wire operating at a

baud rate of 96 Kbps to 1152 Kbps Each device has a unique Modbus ID ranging from 1 to

254 Refer to Section 4114 for Modbus software configuration parameters For LonWorks

Communication each AAON Airflow Signal Processor has a unique Neuron Chip ID which is

loaded on the network by pressing a service switch located on the main board (see Section

4111 Figure 7) The LonWorks network utilizes a shielded twisted pair wire operating at a

fixed baud rate of 78 Kbps Refer to Section 4115 for LonWorks network variables

Sections 4111 and 4112 contain procedures for electrical connection of the AAON Airflow

Signal Processor to the network and for configuring the required communication parameters

Electrical Connection 4111

The following procedure outlines the steps for installing the interface wiring for network

communication Network wire should be low capacitance shielded 22 or 24 AWG twisted pair

with PVC jacket such as Belden Part numbers 9841 3105A or equivalent

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Verify that the Power Switch (S3) is in the OFF position and install the interface

wiring for Pins 9 and 10 as shown in Figure 7 If multiple AAON Airflow Signal

Processors will be connected to the same network see Figure 8 for connecting

multiple devices For network systems that require all devices to have a common

signal ground refer to Figure 9 for electrical connection The J2 electrical

connector has a removable terminal block for ease of installing the interface

wiring

Step 4 For proper operation of BACnet and Modbus communication networks the

device that is electrically installed at the end of the network may require the

Terminator Switch be moved to the ON position to prevent line and data

reflection If Terminator is required it must be applied to both physical ends of

the network All other devices should have the Terminator Switch in the OFF

position The communication board is located on the back side of the main

AAON Airflow Signal Processor board See Figure 10 below for Terminator

Switch location on the communication board

Step 5 For LonWorks Communication refer to Figure 7 for the location of the Lon

Service Pin

37

Step 6 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 7 Configure the required parameters as outlined in Section 4112

Step 8 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

RP1

S3

NETWORK

COMMUNICATION+

-

LON

SERVICE PIN

Figure 7 - Network Communication Electrical Connection

38

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

AAON AIRFLOW

SIGNAL PROCESSOR

CONNECT ONLY ONE END OF SHIELD

WIRE TO EARTH GROUND AS SHOWN

SET TERMINATOR SWITCH

ON IF REQUIRED

NETWORK

COMMUNICATIONS

NETWORK

CONNECT SHIELD

WIRES TOGETHER

CONNECT SHIELD

WIRES TOGETHER

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not

Requiring Common Signal Grounds

Note If using two conductor communication wire use the shield wire to connect all device signal grounds together as shown in the figure below If using three conductor communication wire use the 3rd conductor to connect all device signal grounds together and connect one side of the shield to earth ground

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

SIGNAL

GROUND

8

J2

SIGNAL

GROUND

8

J28

J2

USE SHIELD WIRE OR 3RD CONDUCTOR TO

CONNECT DEVICE SIGNAL GROUND TO

NETWORK SIGNAL GROUND

SET TERMINATOR SWITCH

ON IF REQUIRED

AAON AIRFLOW

SIGNAL PROCESSOR

NETWORK

COMMUNICATIONS

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

SIGNAL

GROUND

SIGNAL

GROUND

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds

39

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location

COMMUNICATION BOARD ID

BOARD SERIAL NO

40

Parameter Configuration 4112

If BACnet or Modbus communication is ordered the associated settings will need to be

configured with the exception of Modbus communication with WattMaster Controls which has

been configured at the factory To set the parameters refer to the following procedure below

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 41121

through 41124 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

41121 MAC Address (BACnet Communication Option)

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network Each AAON Airflow Signal

Processor must have a unique MAC Address assigned ranging from 2 to 127

Tech Config

Password 1000

4PT Flow Corr MAC Address

MAC Address (Range = 02 to 254)

Instance Number

Modbus ID (002)

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 15: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

15

J1 J2

TOTAL

CONNECTION

STATIC

CONNECTION

TOTAL PRESSURE CONECTION

AAON AIRFLOW STATION

STATIC PRESSURE CONNECTION

AAON AIRFLOW STATION

Figure 5 - Pneumatic Connections

45 INPUTOUTPUT SET-UP

If input or output configuration changes are required refer to the Tables 1 and 2 in the sections

below and Figure 3 in Section 44

Process Output 451

If controls are provided by AAON the process output has been set by the factory for input to the

specific controller otherwise the default is 0-10VDC To change the output configuration set

the S2 amp S4 switches as follows

Table 1 - Process Output Switch Configuration

Process Output Range S2 S4

Current 4-20mA NA mA

Voltage 0-10VDC 10V V

Voltage 0-5VDC 5V V

Temperature Input 452

Since the AAON Temperature Transmitter has been provided the temperature input has been set

by the factory for 4-20mA To change the input configuration set the S1 switch as follows

Table 2 - Temperature Input Switch

Configuration

Temperature Input S1 Switch Selection

4-20mA mA

0-10VDC V

16

46 ACTIVE DISPLAYS amp KEY FUNCTIONS

Power-up Initiation Display 461

Upon initial power-up Software Revision information will be displayed on the graphic display

for approximately 5 seconds

EQ-1

Software Rev XXXXX

Modbus Rev XXXXX

Process Display Descriptions 462

After power-up initialization the following information will appear on the graphic display

depending upon the options purchased

75˚F

75˚F

75˚F

000000

000000

000000

AutoZero

ACFM

High Alarm

ACFM

Low Alarm

ACFM

Flow Monitoring with an

Auto Zero Cycle

Flow Monitoring with a

High Alarm Condition

Flow Monitoring with a

Low Alarm Condition

Table 3 - Process Display Descriptions

Number Description

1 Process value

2 Air Flow temperature units in degree F or C

3 Flashing Asterisk indicates the CPU is functioning

4 Engineering units

5 Displayed during an AutoZero cycle

6 Indicating High Alarm Value has been exceeded (HighLow Alarm Option)

7 Indicating Low Alarm Value has been exceeded (HighLow Alarm Option)

12 3

4

6

7 5

17

Key Functions 463

The following figure and description identify the function of each Key

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

2

13

4

567

8

RP1 9

Figure 6 - Key Functions

Table 4 - Key Functions

Number Description

1 Enter Key - Allows a user to enter into the Field Menu enter into a selected menu item

or store into memory changes made to the program

2 Up Key - Allows the user to scroll up in the menu list to a selected item or increase digits

when making value changes

3 Right Key - When making changes to user values the Right Key allows the user to scroll

to the correct digit for changes

4 Down Key - Allows the user to scroll down in the menu list to a selected item or

decrease digits when making value changes

5 Left Key - When making changes to user values the Left Key allows the user to scroll to

the correct digit for changes

6

Escape Key - The Escape Key allows the user to back out of the menu to the Active

Display If a user starts to make a change and decides to cancel the change the Escape

Key will allow the user to return to the Active Display without making the change

7 Power Switch ndash Allows a user to turn power off to the AAON Signal Processor during

field wiring or modifications to the device

8 Lon Switch ndash Allows a user to send a unique Neuron device ID when connecting to a

LonWorks communication network

9 RP1 ndash Allows a user to adjust the display contrast

18

47 DISPLAY MENUS

Table 5 shows the Field Setup and Tech Configuration Menus The display will vary depending

upon the options purchased

Table 5 - Display Menus

Field Setup Menu

(Press ENTER Key)

Tech Configuration Menu

(Press UPDOWN Keys simultaneously)

(Enter Password number 1000)

(Press ENTER Key)

Operating Range Area Factor

Zero Calibration Min Calibration

Eng Units Span Calibration

Lockdown Temp Fixed Value

Flow Correction Altitude

AutoZero Output Calibration

Temp Comp Correction Coeff

Display Filter 4PT Flow Corr

Output Filter MAC Address (Optional)

Alarm Options (Optional) Instance Number (Optional)

Factory Defaults Modbus ID (Optional)

Baud Rate (Optional)

48 FIELD SETUP MENUS

To set parameters under the Field Setup Menus refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Field Setup Menu by depressing and holding the Enter Key for 5

seconds

Step 2 Once in the Field Setup Menu use the UpDown Keys to highlight the

required parameter for configuration as shown in Sections 481 through

4811 Press the Enter Key once to access the highlighted parameter

Menu

Step 3 Once in the parameter menu the parameter can be changed using

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Field

Setup Menu

Step 4 After all of the required parameters have been configured exit the Field

Setup Menu by pressing the ESC Key The Process Display (see Section

462) will then be displayed

19

Operating Range 481

The Operating Range allows the user to enter a value which will represent 100 of the process

output signal (5VDC 10VDC or 20mA) The Operating Range Value has been set by the

factory to equal 110 of the design supply flow rate unless this value is less than the Minimum

Full Scale Value allowed for the AAON Airflow Signal Processor The menu will display the

Minimum Full Scale Value allowed which is then entered as the Operating Range

Field Setup

Menu

Operating Range Operating Range

Zero Calibration ( ACFM )

Engineering Units (6000-12000)

Lockdown (010000)

Zero Pressure Calibration 482

The Zero Calibration Menu allows the user to perform a zero transducer calibration to eliminate

any transducer zero shift

(Caution Before performing a zero calibration disconnect the Total (High) and Static (Low)

pressure connections perform a zero calibration and then reconnect the Total and Static

pressure connections)

Field Setup

Menu

Operating Range Input Value CPU Taking

Zero Calibration (0000) Inch wc Samples

Engineering Units

Lockdown (Press Enter) (Please Wait)

Engineering Units 483

Table 6 lists the engineering units that are available for the user to select from for display

purposes Changing the engineering units will affect the process display and the alarm value

menus The default setting is ACFM

Field Setup

Menu

Operating Range Eng Units

Zero Calibration

Engineering Units (ACFM)

Lockdown

20

Table 6 - Engineering Units

Standard

Flow

Units

Actual

Flow

Units

SCFM ACFM

SCFH LS

SLS Am3S

Sm3S Am3M

Sm3M Am3HR

Sm3HR

Lockdown 484

Due to the high square root gain associated with very low delta p values the display and process

output are locked to a zero value until the input value reaches the specified Lockdown Value that

was entered Above the Lockdown Value the output is linear to air flow

4841 Lockdown Value

The Lockdown Value can be changed from 0 to 20 of Operating Range Value Lockdown

Values can be changed in 1 increments The recommended standard is 5

Field Setup

Menu

Operating Range Lockdown (0-20)

Zero Calibration (5)

Engineering Units Delay (0-20 sec)

Lockdown (2) Sec

4842 Lockdown Delay

The Lockdown Delay Menu allows the user to enter a lockdown time delay (0-20 seconds) that

will delay the display and output lockdown from occurring until the flow value or output value

has remained below the lockdown value for that duration

Field Setup

Menu

Operating Range Lockdown (0-20)

Zero Calibration (5)

Engineering Units Delay (0-20 sec)

Lockdown (2) Sec

21

Flow Correction 485

The Flow Correction Menu was incorporated into the AAON Airflow Signal Processor to give

the user an easy way to make corrections to the display and output without changing the

Operating Range Value entered by the factory or user The Flow Correction Menu would be

used to correct for a constant error from zero to the entered Operating Range Value

4851 Flow Correction (K-Factor)

If the user knows the change required to match the balancers reading select the K-Factor

Menu and enter this value for the K-Factor The minimum and maximum allowable K-Factor

Value is displayed in the K-Factor Menu

Field Setup

Menu

Flow Correction Flow Correction

AutoZero K-Factor K-Factor Range

Temp Comp (085 13)

Display Filter K-Factor Calc K=(01000)

4852 Flow Correction (K-Factor Calculator)

If the new K-factor Value needs to be calculated select the K-Factor Calc Menu Enter the

Displayed Value on the AAON Airflow Signal Processor and actual Measured Value press

Enter and the change will be calculated and stored as the new K-Factor Value

Field Setup

Menu

Flow Correction Displayed Value

AutoZero K-Factor (000000)

Temp Comp Measured Value

Display Filter K-Factor Calc (000000)

-FLOW CORRECTION EXAMPLE-

The balancer is consistently measuring a value of 9500 CFM which is 500 CFM less than the

10000 CFM value on the AAON Airflow Signal Processor display The user would then

perform the following math function Measured Value Displayed Value = K-Factor so 9500

CFM 10000 CFM = 0950 The user would enter 0950 for the K-Factor Flow Correction If

the K-Factor Calculator is used the K- Factor Flow Correction would automatically update the K

Factor

AutoZero 486

The AutoZero feature corrects any zero offset caused by large ambient temperature changes

22

4861 AutoZero Status

The AutoZero Status Menu allows the user to turn the AutoZero function ON or OFF

Field Setup

Menu

Flow Correction AZ Status AZ Status

AutoZero AZ Interval (ONOFF)

Temp Comp AZ Test Interval

Display Filter (ON)

4862 AutoZero Interval

The AutoZero Interval Menu allows the user to select the AutoZero Interval from once an hour

to once a day in 1 hour increments Use the UPDOWN keys to select the interval value Upon

device power up an AutoZero cycle will occur after 20 seconds

Field Setup

Menu

Flow Correction AZ Status AZ Interval

AutoZero AZ Interval (1 TO 24HR)

Temp Comp AZ Test Interval

Display Filter (01)HR

4863 AutoZero Test Interval

For troubleshooting or testing the AutoZero function the AutoZero Test Interval Menu allows

the user to select an Auto Zero test frequency of once a minute to once every 30 minutes in 1

minute increments Use the UPDOWN keys to select the interval value If AutoZero Test

Interval is turned ON for more than 60 minutes it will automatically default to OFF and the

AutoZero Interval (see Section 4862) will be reactivated

Field Setup

Menu

Flow Correction AZ Status AZ Test Interval

AutoZero AZ Interval (OFF)

Temp Comp AZ Test Interval Interval

Display Filter (1)Min

Temperature Compensation 487

The Temperature Compensation option compensates the flow and velocity signal for density

changes caused by variations in the process air temperature An input signal from AAON

Temperature Transmitter is required see Section 33 for proper temperature transmitter

connection and Section 452 for temperature input signal configuration

23

4871 Temperature Units

The Temperature Units Menu allows the user to select the appropriate temperature units for the

job The default setting is ordmF

Field Setup

Menu

Flow Correction Temperature Units Units

AutoZero Temperature Values (ordmF ordmC)

Temp Comp Temperature Input

Display Filter Fixed Value (ordmF)

4872 Temperature Values

The Temperature Values Menu allows the factory or user to set the minimum and maximum

temperature range values that represent the input signal from the external temperature transmitter

or the building automation system Since the AAON Temperature Transmitter has been supplied

the minimum and maximum temperature range values of -30degF to 130degF have been

preprogramed

Field Setup

Menu

Flow Correction Temperature Units Minimum Value

AutoZero Temperature Values (-030)

Temp Comp Temperature Input Maximum Value

Display Filter Fixed Value (130)

If the temperature values are changed from the factory settings and the new temperature values

cause the existing Operating Range Value to be outside the new calculated Minimum or

Maximum Full Scale Value the below Warning Message will appear and the Operating Range

will be reset to the new Maximum Full Scale Value by pressing Enter The display will

automatically jump to the Operating Range Menu allowing the user to enter a new Operating

Range Value This can be accomplished by performing the steps under Section 481 See

Temperature Range Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

24

Minimum Value

(-000)

Maximum Value

(000)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Min amp

Max Temperature

value and pressing the

Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Temperature Range Example-

Minimum Value

(-000)

Accepted

(100)

4873 Temperature Input

The Temperature Input Menu allows the user to select between three temperature input options

(Fixed Variable and Network) for the flow calculations Since the AAON Temperature

Transmitter has been supplied Variable has been selected If Fixed is selected the default

temperature value entered in the Fixed Value Menu (see Section 4874) is used If Net is

selected the temperature input signal is obtained through network communications The Net

option is only available if one of the communication options is ordered The temperature value

is only displayed on the LCD screen if the Temperature Input is set to Variable or Network

Field Setup

Menu

Flow Correction Temperature Units Temp Input

AutoZero Temperature Values (FixVarNet)

Temp Comp Temperature Input

Display Filter Fixed Value (Variable)

25

4874 Fixed Value

The Fixed Value Menu allows the user to enter a temperature value for the flow calculations

This value will not be displayed on the LCD screen

Field Setup

Menu

Flow Correction Temperature Units Fixed Value

AutoZero Temperature Values (˚F)

Temp Comp Temperature Input

Display Filter Fixed Value (+068)

Display Filter 488

The Display Filter Menu allows the user to adjust the Display Filter rolling average algorithm by

setting the Sample Interval Time value in seconds and the number of rolling average Sample

Counts The adjustment range of the Sample Interval Time is 010 to 655 seconds in 010

increments The Sample Count range is 0 to 150 Sample Counts The Display Filter is

independent of the Process Output Filter Value (See Section 489)

Field Setup

Menu

Flow Correction Sample Interval Time

AutoZero (005)sec

Temp Comp (0-150) Sample Count

Display Filter (010)

Process Output Filter 489

The Process Output Filter Menu allows the user to adjust the Process Output Filters rolling

average algorithm by setting the Sample Interval Time value in seconds and the number of

rolling average Sample Counts The adjustment range of the Sample Interval Time is 010 to

655 seconds in 010 increments The Sample Count range is 0 to 150 Sample Counts The

Process Output Filter is independent of the Display Filter Value (See Section 488)

Field Setup

Menu

Output Filter Sample Interval Time

Alarm Options (005)sec

Factory Defaults (0-150) Sample Count

(010)

26

HighLow Alarm Option 4810

The following menus for configuration of HighLow Alarms are only available if the HighLow

Alarm option is purchased

48101 Alarm Status

The Alarm Status allows the user to independently turn each alarm ON or OFF

Field Setup

Menu

Output Filter Alarm Status Low Alarm

Alarm Options Alarm Value (On)

Factory Defaults Alarm Delay High Alarm

(On)

48102 Alarm Values

The Alarm Value Menu allows the user to enter the Low or the High flow alarm value Alarm

values will be displayed in the same engineering units selected in the Eng Units Menu (see

Section 483)

- High Alarm Function The High Alarm activates if the flow exceeds the High Alarm

value and resets when the flow drops below the High Alarm Value

- Low Alarm Function The Low Alarm activates if the flow drops below the Low

Alarm Value and resets when the flow exceeds the Low Alarm Value

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Value

Alarm Options Alarm Value (000000)

Factory Defaults Alarm Delay Hi Alarm Value

(100000)

48103 Alarm Delay

The Alarm Delay Menu allows the user to enter an alarm delay of 0 to 999 seconds before an

alarm will be activated The alarm will be reset without a delay

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Delay

Alarm Options Alarm Value (000)Seconds

Factory Defaults Alarm Delay Hi Alarm Delay

(000)Seconds

27

Factory Defaults 4811

If parameter configuration changes have been made incorrectly to the AAON Airflow Signal

Processor all device settings can be restored to the original AAON factory settings by selecting

YES and pressing Enter in both the Set To Factory Defaults Menu and the Verify Set To Factory

Defaults Menu (see Table 7 below for a list of Saved Settings)

Field Setup

Menu

Output Filter Set To Verify Set To

Alarm Options Factory Defaults Factory Defaults

Factory Defaults

(No) (No)

Table 7 - Factory Defaults

Item Saved Setting Item Saved Setting

1 All Factory Calibration Points (12) 14 MAC Address

2 Area Factor 15 Instance Number

3 Operating Range 16 Engineering Units

4 4 Pt Flow Correction 17 Display Filter Values

5 Altitude 18 Output Filter

6 K-Factor 19 DP Display Format

7 Lockdown amp Delay Values 20 Output Calibration

8 Flow Correction 21 AutoZero Status

9 Flow Coefficient 22 AutoZero Interval

10 Min amp Max Temp Range Values 23 Temp Units

11 Alarm Status 24 Temp Input

12 Alarm Values 25 Temp Fixed Value

13 Alarm Delay 26 Baud Rate

28

49 TECH CONFIGURATION MENUS

To set parameters under the Tech Configuration Menu refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 491

through 4911 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

Area Factor 491

To convert the differential pressure signal from the AAON Airflow Station to a flow value the

Area Factor associated with the AAON Airflow Station has been preprogramed by the factory

If the Area Factor needs to be checked or reconfigured the correct Area Factor for the AAON

Airflow Station can be found on the AAON Airflow Station product label installed in the air

handling unit

Tech Config

Password 1000

Area Factor Area Factor

Min Calibration (FT2)

Span Calibration

Altitude (001000)

29

If the Area Factor is reconfigured and the new Area Factor causes the existing Operating Range

Value to be outside the new calculated Minimum or Maximum Full Scale Value the below

Warning Message will appear and the Operating Range will be reset to the new Maximum Full

Scale Value by pressing Enter The display will automatically jump to the Operating Range

Menu allowing the user to enter a new Operating Range Value This can be accomplished by

performing the steps under Section 481 See Area Factor Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Area Factor

(FT )

(001000)

Area Factor

(FT )

Accepted

(001200)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Area

Factor and pressing

the Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Area Factor Example-

2

2

30

Minimum Calibration 492

The Minimum Calibration Menu allows a user to perform a minimum transducer calibration

This value will be placed in a different memory location and used until a Return to Factory

Defaults is selected (see Section 4811)

(Caution Before performing a minimum calibration disconnect the Total (High) and Static

(Low) Pressure connections perform a minimum calibration and then reconnect the Total

and Static Pressure connections)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00000) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Span Calibration 493

The Span Calibration Menu allows the user to perform a span transducer calibration to eliminate

any possible transducer drift This value will be placed in a different memory location than the

Factory Span memory location and used until a Return to Factory Defaults is selected (see

Section 4811)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00570) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Altitude 494

The Altitude Menu allows the user to enter the specific altitude for the job for the density

calculations the job specific site Altitude has been preprogramed by the factory

Tech Config

Password 1000

Area Factor Altitude

Min Calibration

Span Calibration (0000)Ft

Altitude

31

If the Altitude is changed from the factory setting and the new Altitude causes the existing

Operating Range Value to be outside the new calculated Minimum or Maximum Full Scale

Value the below Warning Message will appear and the Operating Range will be reset to the new

Maximum Full Scale Value by pressing Enter The display will automatically jump to the

Operating Range Menu allowing the user to enter a new Operating Range Value This can be

accomplished by performing the steps under Section 481 See Altitude Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Altitude

(0000)Ft

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Altitude

and pressing the Enter

button will calculate

new Min amp Max Op

Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Altitude Example-

Altitude

Accepted

(0100)Ft

32

Process Output Calibration 495

4951 Minimum Calibration

The Minimum Calibration Menu allows the user to make output zero adjustments Monitor the

output and with each Up or Down key depression the output will increase or decrease by

001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

4952 Span Calibration

The Span Calibration Menu allows the user to make output span adjustments Span adjustments

require a low pressure air source adjusted to the Full Scale Value shown on the side label

Monitor the output and with each Up or Down button depression the output will increase or

decrease by 001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

Probe Coefficient 496

The Probe Correction Coefficient Menu allows the user to modify the formula constant of

109670 used for non-amplified Pitot-type flow sensors

Tech Config

Password 1000

Output Calibration Correction Coeff

Correction Coeff Probe

4PT Flow Corr (109670)

MAC Address (00109670)

33

Four Point Flow Correction 497

The Four Point Flow Correction Menu allows the user to make corrections to the display and

output signal at 20 increments between 20 and 80 of the Operating Range Value entered

The Displayed Value is a fixed value determined by the percentage of Operating Range The

Measured Value is the value determined by an independent balancerrsquos reading

Tech Config

Password 1000

Output Calibration 80000 CFM Displayed Value

Correction Coeff 60000 CFM 80000

4PT Flow Corr 40000 CFM Measured Value

MAC Address 20000 CFM 79500

80000 CFM Displayed Value

60000 CFM 60000

40000 CFM Measured Value

20000 CFM 60500

80000 CFM Displayed Value

60000 CFM 40000

40000 CFM Measured Value

20000 CFM 40100

80000 CFM Displayed Value

60000 CFM 20000

40000 CFM Measured Value

20000 CFM 19500

MAC Address (BACnet Communication Option) 498

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network The default is 002 For

additional information refer to Section 411

Tech Config

Password 1000

Output Calibration MAC Address

Correction Coeff (Range = 02 to 254)

4PT Flow Corr

MAC Address (002)

34

Instance Number (BACnet Communication Option) 499

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The default is 1002 For

additional information refer to Section 411

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (Default = 1002)

Instance Number

Modbus ID (01002)

Modbus ID (Modbus Communication Option) 4910

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network The default is 002 For

communication with WattMaster Controls the Modbus ID has been set by the factory to 009 for

outside airflow applications For additional information refer to the Section 411

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

Baud Rate (BACnet amp Modbus Communication Options) 4911

The Baud Rate Menu allows the user to set a unique network baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate Modbus communications supports

96 192 384 576 and 1152 Kbps baud rate The default is 384 Kbps For communication

with WattMaster Controls the Baud Rate has been set by the factory to 96 Kbps For additional

information refer to Section 411

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

35

410 WARNING MESSAGES

Input Pressure Overrange Message 4101

If the input pressure exceeds the entered Operating Range Value the following message will

appear on the display It will alternate between the process display and the error message until

the input falls below the Operating Range Value

- Caution -

Input Beyond

Operating Range

Selected

Transducer Calibration Message 4102

If during a transducer zero or span calibration process the transducer output pressure value

measured exceeds plusmn20 of the expected value the following message will appear on the display

Once the Enter button is pressed the display returns to the previous calibration menu

Value entered is

Outside Factory

set limits

(Press Enter)

Operating Range Message 4103

If the new values entered for Temperature Compensation Area Factor or Altitude (see Sections

487 491 and 494) causes the Operating Range Value to exceed the new calculated

Maximum Full Scale Value the following message will appear on the display

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

New Operating Range Message 4104

If a user enters a new Operating Range Value the following message will appear on the display

notifying the user that if any 4 PT Flow Correction Values (see Section 497) were previously

entered they will be reset The message allows the user to confirm that the Operating Range

change should be made To complete the Operating Range change the user must use the

UPDown buttons to change the NO to a YES and press the ENTER button

Value will

Reset 4PT

Flow Correction

Values

Make the Change

(NO)

(Press Enter)

36

411 NETWORK COMMUNICATION

The AAON Airflow Signal Processor can be ordered with BACnet Modbus or LonWorks

Communication For BACnet Communication the AAON Airflow Signal Processors utilize

MSTP (Master SlaveToken Passing) BACnet type protocol BACnet is implemented using

EIA-485 signaling standards through a shielded twisted pair wire operating at a baud rate of 96

Kbps to 768 Kbps Each device has a unique MAC Address ranging from 2 to 127 Refer to

Section 4113 for BACnet Protocol Implementation Conformance Statements (PICS) For

Modbus Communication the AAON Airflow Signal Processors utilize the Modbus ndash RTU Slave

protocol using EIA-485 signaling standards through a shielded twisted pair wire operating at a

baud rate of 96 Kbps to 1152 Kbps Each device has a unique Modbus ID ranging from 1 to

254 Refer to Section 4114 for Modbus software configuration parameters For LonWorks

Communication each AAON Airflow Signal Processor has a unique Neuron Chip ID which is

loaded on the network by pressing a service switch located on the main board (see Section

4111 Figure 7) The LonWorks network utilizes a shielded twisted pair wire operating at a

fixed baud rate of 78 Kbps Refer to Section 4115 for LonWorks network variables

Sections 4111 and 4112 contain procedures for electrical connection of the AAON Airflow

Signal Processor to the network and for configuring the required communication parameters

Electrical Connection 4111

The following procedure outlines the steps for installing the interface wiring for network

communication Network wire should be low capacitance shielded 22 or 24 AWG twisted pair

with PVC jacket such as Belden Part numbers 9841 3105A or equivalent

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Verify that the Power Switch (S3) is in the OFF position and install the interface

wiring for Pins 9 and 10 as shown in Figure 7 If multiple AAON Airflow Signal

Processors will be connected to the same network see Figure 8 for connecting

multiple devices For network systems that require all devices to have a common

signal ground refer to Figure 9 for electrical connection The J2 electrical

connector has a removable terminal block for ease of installing the interface

wiring

Step 4 For proper operation of BACnet and Modbus communication networks the

device that is electrically installed at the end of the network may require the

Terminator Switch be moved to the ON position to prevent line and data

reflection If Terminator is required it must be applied to both physical ends of

the network All other devices should have the Terminator Switch in the OFF

position The communication board is located on the back side of the main

AAON Airflow Signal Processor board See Figure 10 below for Terminator

Switch location on the communication board

Step 5 For LonWorks Communication refer to Figure 7 for the location of the Lon

Service Pin

37

Step 6 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 7 Configure the required parameters as outlined in Section 4112

Step 8 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

RP1

S3

NETWORK

COMMUNICATION+

-

LON

SERVICE PIN

Figure 7 - Network Communication Electrical Connection

38

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

AAON AIRFLOW

SIGNAL PROCESSOR

CONNECT ONLY ONE END OF SHIELD

WIRE TO EARTH GROUND AS SHOWN

SET TERMINATOR SWITCH

ON IF REQUIRED

NETWORK

COMMUNICATIONS

NETWORK

CONNECT SHIELD

WIRES TOGETHER

CONNECT SHIELD

WIRES TOGETHER

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not

Requiring Common Signal Grounds

Note If using two conductor communication wire use the shield wire to connect all device signal grounds together as shown in the figure below If using three conductor communication wire use the 3rd conductor to connect all device signal grounds together and connect one side of the shield to earth ground

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

SIGNAL

GROUND

8

J2

SIGNAL

GROUND

8

J28

J2

USE SHIELD WIRE OR 3RD CONDUCTOR TO

CONNECT DEVICE SIGNAL GROUND TO

NETWORK SIGNAL GROUND

SET TERMINATOR SWITCH

ON IF REQUIRED

AAON AIRFLOW

SIGNAL PROCESSOR

NETWORK

COMMUNICATIONS

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

SIGNAL

GROUND

SIGNAL

GROUND

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds

39

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location

COMMUNICATION BOARD ID

BOARD SERIAL NO

40

Parameter Configuration 4112

If BACnet or Modbus communication is ordered the associated settings will need to be

configured with the exception of Modbus communication with WattMaster Controls which has

been configured at the factory To set the parameters refer to the following procedure below

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 41121

through 41124 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

41121 MAC Address (BACnet Communication Option)

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network Each AAON Airflow Signal

Processor must have a unique MAC Address assigned ranging from 2 to 127

Tech Config

Password 1000

4PT Flow Corr MAC Address

MAC Address (Range = 02 to 254)

Instance Number

Modbus ID (002)

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 16: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

16

46 ACTIVE DISPLAYS amp KEY FUNCTIONS

Power-up Initiation Display 461

Upon initial power-up Software Revision information will be displayed on the graphic display

for approximately 5 seconds

EQ-1

Software Rev XXXXX

Modbus Rev XXXXX

Process Display Descriptions 462

After power-up initialization the following information will appear on the graphic display

depending upon the options purchased

75˚F

75˚F

75˚F

000000

000000

000000

AutoZero

ACFM

High Alarm

ACFM

Low Alarm

ACFM

Flow Monitoring with an

Auto Zero Cycle

Flow Monitoring with a

High Alarm Condition

Flow Monitoring with a

Low Alarm Condition

Table 3 - Process Display Descriptions

Number Description

1 Process value

2 Air Flow temperature units in degree F or C

3 Flashing Asterisk indicates the CPU is functioning

4 Engineering units

5 Displayed during an AutoZero cycle

6 Indicating High Alarm Value has been exceeded (HighLow Alarm Option)

7 Indicating Low Alarm Value has been exceeded (HighLow Alarm Option)

12 3

4

6

7 5

17

Key Functions 463

The following figure and description identify the function of each Key

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

2

13

4

567

8

RP1 9

Figure 6 - Key Functions

Table 4 - Key Functions

Number Description

1 Enter Key - Allows a user to enter into the Field Menu enter into a selected menu item

or store into memory changes made to the program

2 Up Key - Allows the user to scroll up in the menu list to a selected item or increase digits

when making value changes

3 Right Key - When making changes to user values the Right Key allows the user to scroll

to the correct digit for changes

4 Down Key - Allows the user to scroll down in the menu list to a selected item or

decrease digits when making value changes

5 Left Key - When making changes to user values the Left Key allows the user to scroll to

the correct digit for changes

6

Escape Key - The Escape Key allows the user to back out of the menu to the Active

Display If a user starts to make a change and decides to cancel the change the Escape

Key will allow the user to return to the Active Display without making the change

7 Power Switch ndash Allows a user to turn power off to the AAON Signal Processor during

field wiring or modifications to the device

8 Lon Switch ndash Allows a user to send a unique Neuron device ID when connecting to a

LonWorks communication network

9 RP1 ndash Allows a user to adjust the display contrast

18

47 DISPLAY MENUS

Table 5 shows the Field Setup and Tech Configuration Menus The display will vary depending

upon the options purchased

Table 5 - Display Menus

Field Setup Menu

(Press ENTER Key)

Tech Configuration Menu

(Press UPDOWN Keys simultaneously)

(Enter Password number 1000)

(Press ENTER Key)

Operating Range Area Factor

Zero Calibration Min Calibration

Eng Units Span Calibration

Lockdown Temp Fixed Value

Flow Correction Altitude

AutoZero Output Calibration

Temp Comp Correction Coeff

Display Filter 4PT Flow Corr

Output Filter MAC Address (Optional)

Alarm Options (Optional) Instance Number (Optional)

Factory Defaults Modbus ID (Optional)

Baud Rate (Optional)

48 FIELD SETUP MENUS

To set parameters under the Field Setup Menus refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Field Setup Menu by depressing and holding the Enter Key for 5

seconds

Step 2 Once in the Field Setup Menu use the UpDown Keys to highlight the

required parameter for configuration as shown in Sections 481 through

4811 Press the Enter Key once to access the highlighted parameter

Menu

Step 3 Once in the parameter menu the parameter can be changed using

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Field

Setup Menu

Step 4 After all of the required parameters have been configured exit the Field

Setup Menu by pressing the ESC Key The Process Display (see Section

462) will then be displayed

19

Operating Range 481

The Operating Range allows the user to enter a value which will represent 100 of the process

output signal (5VDC 10VDC or 20mA) The Operating Range Value has been set by the

factory to equal 110 of the design supply flow rate unless this value is less than the Minimum

Full Scale Value allowed for the AAON Airflow Signal Processor The menu will display the

Minimum Full Scale Value allowed which is then entered as the Operating Range

Field Setup

Menu

Operating Range Operating Range

Zero Calibration ( ACFM )

Engineering Units (6000-12000)

Lockdown (010000)

Zero Pressure Calibration 482

The Zero Calibration Menu allows the user to perform a zero transducer calibration to eliminate

any transducer zero shift

(Caution Before performing a zero calibration disconnect the Total (High) and Static (Low)

pressure connections perform a zero calibration and then reconnect the Total and Static

pressure connections)

Field Setup

Menu

Operating Range Input Value CPU Taking

Zero Calibration (0000) Inch wc Samples

Engineering Units

Lockdown (Press Enter) (Please Wait)

Engineering Units 483

Table 6 lists the engineering units that are available for the user to select from for display

purposes Changing the engineering units will affect the process display and the alarm value

menus The default setting is ACFM

Field Setup

Menu

Operating Range Eng Units

Zero Calibration

Engineering Units (ACFM)

Lockdown

20

Table 6 - Engineering Units

Standard

Flow

Units

Actual

Flow

Units

SCFM ACFM

SCFH LS

SLS Am3S

Sm3S Am3M

Sm3M Am3HR

Sm3HR

Lockdown 484

Due to the high square root gain associated with very low delta p values the display and process

output are locked to a zero value until the input value reaches the specified Lockdown Value that

was entered Above the Lockdown Value the output is linear to air flow

4841 Lockdown Value

The Lockdown Value can be changed from 0 to 20 of Operating Range Value Lockdown

Values can be changed in 1 increments The recommended standard is 5

Field Setup

Menu

Operating Range Lockdown (0-20)

Zero Calibration (5)

Engineering Units Delay (0-20 sec)

Lockdown (2) Sec

4842 Lockdown Delay

The Lockdown Delay Menu allows the user to enter a lockdown time delay (0-20 seconds) that

will delay the display and output lockdown from occurring until the flow value or output value

has remained below the lockdown value for that duration

Field Setup

Menu

Operating Range Lockdown (0-20)

Zero Calibration (5)

Engineering Units Delay (0-20 sec)

Lockdown (2) Sec

21

Flow Correction 485

The Flow Correction Menu was incorporated into the AAON Airflow Signal Processor to give

the user an easy way to make corrections to the display and output without changing the

Operating Range Value entered by the factory or user The Flow Correction Menu would be

used to correct for a constant error from zero to the entered Operating Range Value

4851 Flow Correction (K-Factor)

If the user knows the change required to match the balancers reading select the K-Factor

Menu and enter this value for the K-Factor The minimum and maximum allowable K-Factor

Value is displayed in the K-Factor Menu

Field Setup

Menu

Flow Correction Flow Correction

AutoZero K-Factor K-Factor Range

Temp Comp (085 13)

Display Filter K-Factor Calc K=(01000)

4852 Flow Correction (K-Factor Calculator)

If the new K-factor Value needs to be calculated select the K-Factor Calc Menu Enter the

Displayed Value on the AAON Airflow Signal Processor and actual Measured Value press

Enter and the change will be calculated and stored as the new K-Factor Value

Field Setup

Menu

Flow Correction Displayed Value

AutoZero K-Factor (000000)

Temp Comp Measured Value

Display Filter K-Factor Calc (000000)

-FLOW CORRECTION EXAMPLE-

The balancer is consistently measuring a value of 9500 CFM which is 500 CFM less than the

10000 CFM value on the AAON Airflow Signal Processor display The user would then

perform the following math function Measured Value Displayed Value = K-Factor so 9500

CFM 10000 CFM = 0950 The user would enter 0950 for the K-Factor Flow Correction If

the K-Factor Calculator is used the K- Factor Flow Correction would automatically update the K

Factor

AutoZero 486

The AutoZero feature corrects any zero offset caused by large ambient temperature changes

22

4861 AutoZero Status

The AutoZero Status Menu allows the user to turn the AutoZero function ON or OFF

Field Setup

Menu

Flow Correction AZ Status AZ Status

AutoZero AZ Interval (ONOFF)

Temp Comp AZ Test Interval

Display Filter (ON)

4862 AutoZero Interval

The AutoZero Interval Menu allows the user to select the AutoZero Interval from once an hour

to once a day in 1 hour increments Use the UPDOWN keys to select the interval value Upon

device power up an AutoZero cycle will occur after 20 seconds

Field Setup

Menu

Flow Correction AZ Status AZ Interval

AutoZero AZ Interval (1 TO 24HR)

Temp Comp AZ Test Interval

Display Filter (01)HR

4863 AutoZero Test Interval

For troubleshooting or testing the AutoZero function the AutoZero Test Interval Menu allows

the user to select an Auto Zero test frequency of once a minute to once every 30 minutes in 1

minute increments Use the UPDOWN keys to select the interval value If AutoZero Test

Interval is turned ON for more than 60 minutes it will automatically default to OFF and the

AutoZero Interval (see Section 4862) will be reactivated

Field Setup

Menu

Flow Correction AZ Status AZ Test Interval

AutoZero AZ Interval (OFF)

Temp Comp AZ Test Interval Interval

Display Filter (1)Min

Temperature Compensation 487

The Temperature Compensation option compensates the flow and velocity signal for density

changes caused by variations in the process air temperature An input signal from AAON

Temperature Transmitter is required see Section 33 for proper temperature transmitter

connection and Section 452 for temperature input signal configuration

23

4871 Temperature Units

The Temperature Units Menu allows the user to select the appropriate temperature units for the

job The default setting is ordmF

Field Setup

Menu

Flow Correction Temperature Units Units

AutoZero Temperature Values (ordmF ordmC)

Temp Comp Temperature Input

Display Filter Fixed Value (ordmF)

4872 Temperature Values

The Temperature Values Menu allows the factory or user to set the minimum and maximum

temperature range values that represent the input signal from the external temperature transmitter

or the building automation system Since the AAON Temperature Transmitter has been supplied

the minimum and maximum temperature range values of -30degF to 130degF have been

preprogramed

Field Setup

Menu

Flow Correction Temperature Units Minimum Value

AutoZero Temperature Values (-030)

Temp Comp Temperature Input Maximum Value

Display Filter Fixed Value (130)

If the temperature values are changed from the factory settings and the new temperature values

cause the existing Operating Range Value to be outside the new calculated Minimum or

Maximum Full Scale Value the below Warning Message will appear and the Operating Range

will be reset to the new Maximum Full Scale Value by pressing Enter The display will

automatically jump to the Operating Range Menu allowing the user to enter a new Operating

Range Value This can be accomplished by performing the steps under Section 481 See

Temperature Range Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

24

Minimum Value

(-000)

Maximum Value

(000)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Min amp

Max Temperature

value and pressing the

Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Temperature Range Example-

Minimum Value

(-000)

Accepted

(100)

4873 Temperature Input

The Temperature Input Menu allows the user to select between three temperature input options

(Fixed Variable and Network) for the flow calculations Since the AAON Temperature

Transmitter has been supplied Variable has been selected If Fixed is selected the default

temperature value entered in the Fixed Value Menu (see Section 4874) is used If Net is

selected the temperature input signal is obtained through network communications The Net

option is only available if one of the communication options is ordered The temperature value

is only displayed on the LCD screen if the Temperature Input is set to Variable or Network

Field Setup

Menu

Flow Correction Temperature Units Temp Input

AutoZero Temperature Values (FixVarNet)

Temp Comp Temperature Input

Display Filter Fixed Value (Variable)

25

4874 Fixed Value

The Fixed Value Menu allows the user to enter a temperature value for the flow calculations

This value will not be displayed on the LCD screen

Field Setup

Menu

Flow Correction Temperature Units Fixed Value

AutoZero Temperature Values (˚F)

Temp Comp Temperature Input

Display Filter Fixed Value (+068)

Display Filter 488

The Display Filter Menu allows the user to adjust the Display Filter rolling average algorithm by

setting the Sample Interval Time value in seconds and the number of rolling average Sample

Counts The adjustment range of the Sample Interval Time is 010 to 655 seconds in 010

increments The Sample Count range is 0 to 150 Sample Counts The Display Filter is

independent of the Process Output Filter Value (See Section 489)

Field Setup

Menu

Flow Correction Sample Interval Time

AutoZero (005)sec

Temp Comp (0-150) Sample Count

Display Filter (010)

Process Output Filter 489

The Process Output Filter Menu allows the user to adjust the Process Output Filters rolling

average algorithm by setting the Sample Interval Time value in seconds and the number of

rolling average Sample Counts The adjustment range of the Sample Interval Time is 010 to

655 seconds in 010 increments The Sample Count range is 0 to 150 Sample Counts The

Process Output Filter is independent of the Display Filter Value (See Section 488)

Field Setup

Menu

Output Filter Sample Interval Time

Alarm Options (005)sec

Factory Defaults (0-150) Sample Count

(010)

26

HighLow Alarm Option 4810

The following menus for configuration of HighLow Alarms are only available if the HighLow

Alarm option is purchased

48101 Alarm Status

The Alarm Status allows the user to independently turn each alarm ON or OFF

Field Setup

Menu

Output Filter Alarm Status Low Alarm

Alarm Options Alarm Value (On)

Factory Defaults Alarm Delay High Alarm

(On)

48102 Alarm Values

The Alarm Value Menu allows the user to enter the Low or the High flow alarm value Alarm

values will be displayed in the same engineering units selected in the Eng Units Menu (see

Section 483)

- High Alarm Function The High Alarm activates if the flow exceeds the High Alarm

value and resets when the flow drops below the High Alarm Value

- Low Alarm Function The Low Alarm activates if the flow drops below the Low

Alarm Value and resets when the flow exceeds the Low Alarm Value

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Value

Alarm Options Alarm Value (000000)

Factory Defaults Alarm Delay Hi Alarm Value

(100000)

48103 Alarm Delay

The Alarm Delay Menu allows the user to enter an alarm delay of 0 to 999 seconds before an

alarm will be activated The alarm will be reset without a delay

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Delay

Alarm Options Alarm Value (000)Seconds

Factory Defaults Alarm Delay Hi Alarm Delay

(000)Seconds

27

Factory Defaults 4811

If parameter configuration changes have been made incorrectly to the AAON Airflow Signal

Processor all device settings can be restored to the original AAON factory settings by selecting

YES and pressing Enter in both the Set To Factory Defaults Menu and the Verify Set To Factory

Defaults Menu (see Table 7 below for a list of Saved Settings)

Field Setup

Menu

Output Filter Set To Verify Set To

Alarm Options Factory Defaults Factory Defaults

Factory Defaults

(No) (No)

Table 7 - Factory Defaults

Item Saved Setting Item Saved Setting

1 All Factory Calibration Points (12) 14 MAC Address

2 Area Factor 15 Instance Number

3 Operating Range 16 Engineering Units

4 4 Pt Flow Correction 17 Display Filter Values

5 Altitude 18 Output Filter

6 K-Factor 19 DP Display Format

7 Lockdown amp Delay Values 20 Output Calibration

8 Flow Correction 21 AutoZero Status

9 Flow Coefficient 22 AutoZero Interval

10 Min amp Max Temp Range Values 23 Temp Units

11 Alarm Status 24 Temp Input

12 Alarm Values 25 Temp Fixed Value

13 Alarm Delay 26 Baud Rate

28

49 TECH CONFIGURATION MENUS

To set parameters under the Tech Configuration Menu refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 491

through 4911 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

Area Factor 491

To convert the differential pressure signal from the AAON Airflow Station to a flow value the

Area Factor associated with the AAON Airflow Station has been preprogramed by the factory

If the Area Factor needs to be checked or reconfigured the correct Area Factor for the AAON

Airflow Station can be found on the AAON Airflow Station product label installed in the air

handling unit

Tech Config

Password 1000

Area Factor Area Factor

Min Calibration (FT2)

Span Calibration

Altitude (001000)

29

If the Area Factor is reconfigured and the new Area Factor causes the existing Operating Range

Value to be outside the new calculated Minimum or Maximum Full Scale Value the below

Warning Message will appear and the Operating Range will be reset to the new Maximum Full

Scale Value by pressing Enter The display will automatically jump to the Operating Range

Menu allowing the user to enter a new Operating Range Value This can be accomplished by

performing the steps under Section 481 See Area Factor Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Area Factor

(FT )

(001000)

Area Factor

(FT )

Accepted

(001200)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Area

Factor and pressing

the Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Area Factor Example-

2

2

30

Minimum Calibration 492

The Minimum Calibration Menu allows a user to perform a minimum transducer calibration

This value will be placed in a different memory location and used until a Return to Factory

Defaults is selected (see Section 4811)

(Caution Before performing a minimum calibration disconnect the Total (High) and Static

(Low) Pressure connections perform a minimum calibration and then reconnect the Total

and Static Pressure connections)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00000) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Span Calibration 493

The Span Calibration Menu allows the user to perform a span transducer calibration to eliminate

any possible transducer drift This value will be placed in a different memory location than the

Factory Span memory location and used until a Return to Factory Defaults is selected (see

Section 4811)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00570) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Altitude 494

The Altitude Menu allows the user to enter the specific altitude for the job for the density

calculations the job specific site Altitude has been preprogramed by the factory

Tech Config

Password 1000

Area Factor Altitude

Min Calibration

Span Calibration (0000)Ft

Altitude

31

If the Altitude is changed from the factory setting and the new Altitude causes the existing

Operating Range Value to be outside the new calculated Minimum or Maximum Full Scale

Value the below Warning Message will appear and the Operating Range will be reset to the new

Maximum Full Scale Value by pressing Enter The display will automatically jump to the

Operating Range Menu allowing the user to enter a new Operating Range Value This can be

accomplished by performing the steps under Section 481 See Altitude Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Altitude

(0000)Ft

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Altitude

and pressing the Enter

button will calculate

new Min amp Max Op

Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Altitude Example-

Altitude

Accepted

(0100)Ft

32

Process Output Calibration 495

4951 Minimum Calibration

The Minimum Calibration Menu allows the user to make output zero adjustments Monitor the

output and with each Up or Down key depression the output will increase or decrease by

001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

4952 Span Calibration

The Span Calibration Menu allows the user to make output span adjustments Span adjustments

require a low pressure air source adjusted to the Full Scale Value shown on the side label

Monitor the output and with each Up or Down button depression the output will increase or

decrease by 001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

Probe Coefficient 496

The Probe Correction Coefficient Menu allows the user to modify the formula constant of

109670 used for non-amplified Pitot-type flow sensors

Tech Config

Password 1000

Output Calibration Correction Coeff

Correction Coeff Probe

4PT Flow Corr (109670)

MAC Address (00109670)

33

Four Point Flow Correction 497

The Four Point Flow Correction Menu allows the user to make corrections to the display and

output signal at 20 increments between 20 and 80 of the Operating Range Value entered

The Displayed Value is a fixed value determined by the percentage of Operating Range The

Measured Value is the value determined by an independent balancerrsquos reading

Tech Config

Password 1000

Output Calibration 80000 CFM Displayed Value

Correction Coeff 60000 CFM 80000

4PT Flow Corr 40000 CFM Measured Value

MAC Address 20000 CFM 79500

80000 CFM Displayed Value

60000 CFM 60000

40000 CFM Measured Value

20000 CFM 60500

80000 CFM Displayed Value

60000 CFM 40000

40000 CFM Measured Value

20000 CFM 40100

80000 CFM Displayed Value

60000 CFM 20000

40000 CFM Measured Value

20000 CFM 19500

MAC Address (BACnet Communication Option) 498

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network The default is 002 For

additional information refer to Section 411

Tech Config

Password 1000

Output Calibration MAC Address

Correction Coeff (Range = 02 to 254)

4PT Flow Corr

MAC Address (002)

34

Instance Number (BACnet Communication Option) 499

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The default is 1002 For

additional information refer to Section 411

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (Default = 1002)

Instance Number

Modbus ID (01002)

Modbus ID (Modbus Communication Option) 4910

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network The default is 002 For

communication with WattMaster Controls the Modbus ID has been set by the factory to 009 for

outside airflow applications For additional information refer to the Section 411

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

Baud Rate (BACnet amp Modbus Communication Options) 4911

The Baud Rate Menu allows the user to set a unique network baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate Modbus communications supports

96 192 384 576 and 1152 Kbps baud rate The default is 384 Kbps For communication

with WattMaster Controls the Baud Rate has been set by the factory to 96 Kbps For additional

information refer to Section 411

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

35

410 WARNING MESSAGES

Input Pressure Overrange Message 4101

If the input pressure exceeds the entered Operating Range Value the following message will

appear on the display It will alternate between the process display and the error message until

the input falls below the Operating Range Value

- Caution -

Input Beyond

Operating Range

Selected

Transducer Calibration Message 4102

If during a transducer zero or span calibration process the transducer output pressure value

measured exceeds plusmn20 of the expected value the following message will appear on the display

Once the Enter button is pressed the display returns to the previous calibration menu

Value entered is

Outside Factory

set limits

(Press Enter)

Operating Range Message 4103

If the new values entered for Temperature Compensation Area Factor or Altitude (see Sections

487 491 and 494) causes the Operating Range Value to exceed the new calculated

Maximum Full Scale Value the following message will appear on the display

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

New Operating Range Message 4104

If a user enters a new Operating Range Value the following message will appear on the display

notifying the user that if any 4 PT Flow Correction Values (see Section 497) were previously

entered they will be reset The message allows the user to confirm that the Operating Range

change should be made To complete the Operating Range change the user must use the

UPDown buttons to change the NO to a YES and press the ENTER button

Value will

Reset 4PT

Flow Correction

Values

Make the Change

(NO)

(Press Enter)

36

411 NETWORK COMMUNICATION

The AAON Airflow Signal Processor can be ordered with BACnet Modbus or LonWorks

Communication For BACnet Communication the AAON Airflow Signal Processors utilize

MSTP (Master SlaveToken Passing) BACnet type protocol BACnet is implemented using

EIA-485 signaling standards through a shielded twisted pair wire operating at a baud rate of 96

Kbps to 768 Kbps Each device has a unique MAC Address ranging from 2 to 127 Refer to

Section 4113 for BACnet Protocol Implementation Conformance Statements (PICS) For

Modbus Communication the AAON Airflow Signal Processors utilize the Modbus ndash RTU Slave

protocol using EIA-485 signaling standards through a shielded twisted pair wire operating at a

baud rate of 96 Kbps to 1152 Kbps Each device has a unique Modbus ID ranging from 1 to

254 Refer to Section 4114 for Modbus software configuration parameters For LonWorks

Communication each AAON Airflow Signal Processor has a unique Neuron Chip ID which is

loaded on the network by pressing a service switch located on the main board (see Section

4111 Figure 7) The LonWorks network utilizes a shielded twisted pair wire operating at a

fixed baud rate of 78 Kbps Refer to Section 4115 for LonWorks network variables

Sections 4111 and 4112 contain procedures for electrical connection of the AAON Airflow

Signal Processor to the network and for configuring the required communication parameters

Electrical Connection 4111

The following procedure outlines the steps for installing the interface wiring for network

communication Network wire should be low capacitance shielded 22 or 24 AWG twisted pair

with PVC jacket such as Belden Part numbers 9841 3105A or equivalent

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Verify that the Power Switch (S3) is in the OFF position and install the interface

wiring for Pins 9 and 10 as shown in Figure 7 If multiple AAON Airflow Signal

Processors will be connected to the same network see Figure 8 for connecting

multiple devices For network systems that require all devices to have a common

signal ground refer to Figure 9 for electrical connection The J2 electrical

connector has a removable terminal block for ease of installing the interface

wiring

Step 4 For proper operation of BACnet and Modbus communication networks the

device that is electrically installed at the end of the network may require the

Terminator Switch be moved to the ON position to prevent line and data

reflection If Terminator is required it must be applied to both physical ends of

the network All other devices should have the Terminator Switch in the OFF

position The communication board is located on the back side of the main

AAON Airflow Signal Processor board See Figure 10 below for Terminator

Switch location on the communication board

Step 5 For LonWorks Communication refer to Figure 7 for the location of the Lon

Service Pin

37

Step 6 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 7 Configure the required parameters as outlined in Section 4112

Step 8 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

RP1

S3

NETWORK

COMMUNICATION+

-

LON

SERVICE PIN

Figure 7 - Network Communication Electrical Connection

38

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

AAON AIRFLOW

SIGNAL PROCESSOR

CONNECT ONLY ONE END OF SHIELD

WIRE TO EARTH GROUND AS SHOWN

SET TERMINATOR SWITCH

ON IF REQUIRED

NETWORK

COMMUNICATIONS

NETWORK

CONNECT SHIELD

WIRES TOGETHER

CONNECT SHIELD

WIRES TOGETHER

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not

Requiring Common Signal Grounds

Note If using two conductor communication wire use the shield wire to connect all device signal grounds together as shown in the figure below If using three conductor communication wire use the 3rd conductor to connect all device signal grounds together and connect one side of the shield to earth ground

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

SIGNAL

GROUND

8

J2

SIGNAL

GROUND

8

J28

J2

USE SHIELD WIRE OR 3RD CONDUCTOR TO

CONNECT DEVICE SIGNAL GROUND TO

NETWORK SIGNAL GROUND

SET TERMINATOR SWITCH

ON IF REQUIRED

AAON AIRFLOW

SIGNAL PROCESSOR

NETWORK

COMMUNICATIONS

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

SIGNAL

GROUND

SIGNAL

GROUND

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds

39

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location

COMMUNICATION BOARD ID

BOARD SERIAL NO

40

Parameter Configuration 4112

If BACnet or Modbus communication is ordered the associated settings will need to be

configured with the exception of Modbus communication with WattMaster Controls which has

been configured at the factory To set the parameters refer to the following procedure below

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 41121

through 41124 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

41121 MAC Address (BACnet Communication Option)

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network Each AAON Airflow Signal

Processor must have a unique MAC Address assigned ranging from 2 to 127

Tech Config

Password 1000

4PT Flow Corr MAC Address

MAC Address (Range = 02 to 254)

Instance Number

Modbus ID (002)

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 17: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

17

Key Functions 463

The following figure and description identify the function of each Key

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

2

13

4

567

8

RP1 9

Figure 6 - Key Functions

Table 4 - Key Functions

Number Description

1 Enter Key - Allows a user to enter into the Field Menu enter into a selected menu item

or store into memory changes made to the program

2 Up Key - Allows the user to scroll up in the menu list to a selected item or increase digits

when making value changes

3 Right Key - When making changes to user values the Right Key allows the user to scroll

to the correct digit for changes

4 Down Key - Allows the user to scroll down in the menu list to a selected item or

decrease digits when making value changes

5 Left Key - When making changes to user values the Left Key allows the user to scroll to

the correct digit for changes

6

Escape Key - The Escape Key allows the user to back out of the menu to the Active

Display If a user starts to make a change and decides to cancel the change the Escape

Key will allow the user to return to the Active Display without making the change

7 Power Switch ndash Allows a user to turn power off to the AAON Signal Processor during

field wiring or modifications to the device

8 Lon Switch ndash Allows a user to send a unique Neuron device ID when connecting to a

LonWorks communication network

9 RP1 ndash Allows a user to adjust the display contrast

18

47 DISPLAY MENUS

Table 5 shows the Field Setup and Tech Configuration Menus The display will vary depending

upon the options purchased

Table 5 - Display Menus

Field Setup Menu

(Press ENTER Key)

Tech Configuration Menu

(Press UPDOWN Keys simultaneously)

(Enter Password number 1000)

(Press ENTER Key)

Operating Range Area Factor

Zero Calibration Min Calibration

Eng Units Span Calibration

Lockdown Temp Fixed Value

Flow Correction Altitude

AutoZero Output Calibration

Temp Comp Correction Coeff

Display Filter 4PT Flow Corr

Output Filter MAC Address (Optional)

Alarm Options (Optional) Instance Number (Optional)

Factory Defaults Modbus ID (Optional)

Baud Rate (Optional)

48 FIELD SETUP MENUS

To set parameters under the Field Setup Menus refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Field Setup Menu by depressing and holding the Enter Key for 5

seconds

Step 2 Once in the Field Setup Menu use the UpDown Keys to highlight the

required parameter for configuration as shown in Sections 481 through

4811 Press the Enter Key once to access the highlighted parameter

Menu

Step 3 Once in the parameter menu the parameter can be changed using

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Field

Setup Menu

Step 4 After all of the required parameters have been configured exit the Field

Setup Menu by pressing the ESC Key The Process Display (see Section

462) will then be displayed

19

Operating Range 481

The Operating Range allows the user to enter a value which will represent 100 of the process

output signal (5VDC 10VDC or 20mA) The Operating Range Value has been set by the

factory to equal 110 of the design supply flow rate unless this value is less than the Minimum

Full Scale Value allowed for the AAON Airflow Signal Processor The menu will display the

Minimum Full Scale Value allowed which is then entered as the Operating Range

Field Setup

Menu

Operating Range Operating Range

Zero Calibration ( ACFM )

Engineering Units (6000-12000)

Lockdown (010000)

Zero Pressure Calibration 482

The Zero Calibration Menu allows the user to perform a zero transducer calibration to eliminate

any transducer zero shift

(Caution Before performing a zero calibration disconnect the Total (High) and Static (Low)

pressure connections perform a zero calibration and then reconnect the Total and Static

pressure connections)

Field Setup

Menu

Operating Range Input Value CPU Taking

Zero Calibration (0000) Inch wc Samples

Engineering Units

Lockdown (Press Enter) (Please Wait)

Engineering Units 483

Table 6 lists the engineering units that are available for the user to select from for display

purposes Changing the engineering units will affect the process display and the alarm value

menus The default setting is ACFM

Field Setup

Menu

Operating Range Eng Units

Zero Calibration

Engineering Units (ACFM)

Lockdown

20

Table 6 - Engineering Units

Standard

Flow

Units

Actual

Flow

Units

SCFM ACFM

SCFH LS

SLS Am3S

Sm3S Am3M

Sm3M Am3HR

Sm3HR

Lockdown 484

Due to the high square root gain associated with very low delta p values the display and process

output are locked to a zero value until the input value reaches the specified Lockdown Value that

was entered Above the Lockdown Value the output is linear to air flow

4841 Lockdown Value

The Lockdown Value can be changed from 0 to 20 of Operating Range Value Lockdown

Values can be changed in 1 increments The recommended standard is 5

Field Setup

Menu

Operating Range Lockdown (0-20)

Zero Calibration (5)

Engineering Units Delay (0-20 sec)

Lockdown (2) Sec

4842 Lockdown Delay

The Lockdown Delay Menu allows the user to enter a lockdown time delay (0-20 seconds) that

will delay the display and output lockdown from occurring until the flow value or output value

has remained below the lockdown value for that duration

Field Setup

Menu

Operating Range Lockdown (0-20)

Zero Calibration (5)

Engineering Units Delay (0-20 sec)

Lockdown (2) Sec

21

Flow Correction 485

The Flow Correction Menu was incorporated into the AAON Airflow Signal Processor to give

the user an easy way to make corrections to the display and output without changing the

Operating Range Value entered by the factory or user The Flow Correction Menu would be

used to correct for a constant error from zero to the entered Operating Range Value

4851 Flow Correction (K-Factor)

If the user knows the change required to match the balancers reading select the K-Factor

Menu and enter this value for the K-Factor The minimum and maximum allowable K-Factor

Value is displayed in the K-Factor Menu

Field Setup

Menu

Flow Correction Flow Correction

AutoZero K-Factor K-Factor Range

Temp Comp (085 13)

Display Filter K-Factor Calc K=(01000)

4852 Flow Correction (K-Factor Calculator)

If the new K-factor Value needs to be calculated select the K-Factor Calc Menu Enter the

Displayed Value on the AAON Airflow Signal Processor and actual Measured Value press

Enter and the change will be calculated and stored as the new K-Factor Value

Field Setup

Menu

Flow Correction Displayed Value

AutoZero K-Factor (000000)

Temp Comp Measured Value

Display Filter K-Factor Calc (000000)

-FLOW CORRECTION EXAMPLE-

The balancer is consistently measuring a value of 9500 CFM which is 500 CFM less than the

10000 CFM value on the AAON Airflow Signal Processor display The user would then

perform the following math function Measured Value Displayed Value = K-Factor so 9500

CFM 10000 CFM = 0950 The user would enter 0950 for the K-Factor Flow Correction If

the K-Factor Calculator is used the K- Factor Flow Correction would automatically update the K

Factor

AutoZero 486

The AutoZero feature corrects any zero offset caused by large ambient temperature changes

22

4861 AutoZero Status

The AutoZero Status Menu allows the user to turn the AutoZero function ON or OFF

Field Setup

Menu

Flow Correction AZ Status AZ Status

AutoZero AZ Interval (ONOFF)

Temp Comp AZ Test Interval

Display Filter (ON)

4862 AutoZero Interval

The AutoZero Interval Menu allows the user to select the AutoZero Interval from once an hour

to once a day in 1 hour increments Use the UPDOWN keys to select the interval value Upon

device power up an AutoZero cycle will occur after 20 seconds

Field Setup

Menu

Flow Correction AZ Status AZ Interval

AutoZero AZ Interval (1 TO 24HR)

Temp Comp AZ Test Interval

Display Filter (01)HR

4863 AutoZero Test Interval

For troubleshooting or testing the AutoZero function the AutoZero Test Interval Menu allows

the user to select an Auto Zero test frequency of once a minute to once every 30 minutes in 1

minute increments Use the UPDOWN keys to select the interval value If AutoZero Test

Interval is turned ON for more than 60 minutes it will automatically default to OFF and the

AutoZero Interval (see Section 4862) will be reactivated

Field Setup

Menu

Flow Correction AZ Status AZ Test Interval

AutoZero AZ Interval (OFF)

Temp Comp AZ Test Interval Interval

Display Filter (1)Min

Temperature Compensation 487

The Temperature Compensation option compensates the flow and velocity signal for density

changes caused by variations in the process air temperature An input signal from AAON

Temperature Transmitter is required see Section 33 for proper temperature transmitter

connection and Section 452 for temperature input signal configuration

23

4871 Temperature Units

The Temperature Units Menu allows the user to select the appropriate temperature units for the

job The default setting is ordmF

Field Setup

Menu

Flow Correction Temperature Units Units

AutoZero Temperature Values (ordmF ordmC)

Temp Comp Temperature Input

Display Filter Fixed Value (ordmF)

4872 Temperature Values

The Temperature Values Menu allows the factory or user to set the minimum and maximum

temperature range values that represent the input signal from the external temperature transmitter

or the building automation system Since the AAON Temperature Transmitter has been supplied

the minimum and maximum temperature range values of -30degF to 130degF have been

preprogramed

Field Setup

Menu

Flow Correction Temperature Units Minimum Value

AutoZero Temperature Values (-030)

Temp Comp Temperature Input Maximum Value

Display Filter Fixed Value (130)

If the temperature values are changed from the factory settings and the new temperature values

cause the existing Operating Range Value to be outside the new calculated Minimum or

Maximum Full Scale Value the below Warning Message will appear and the Operating Range

will be reset to the new Maximum Full Scale Value by pressing Enter The display will

automatically jump to the Operating Range Menu allowing the user to enter a new Operating

Range Value This can be accomplished by performing the steps under Section 481 See

Temperature Range Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

24

Minimum Value

(-000)

Maximum Value

(000)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Min amp

Max Temperature

value and pressing the

Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Temperature Range Example-

Minimum Value

(-000)

Accepted

(100)

4873 Temperature Input

The Temperature Input Menu allows the user to select between three temperature input options

(Fixed Variable and Network) for the flow calculations Since the AAON Temperature

Transmitter has been supplied Variable has been selected If Fixed is selected the default

temperature value entered in the Fixed Value Menu (see Section 4874) is used If Net is

selected the temperature input signal is obtained through network communications The Net

option is only available if one of the communication options is ordered The temperature value

is only displayed on the LCD screen if the Temperature Input is set to Variable or Network

Field Setup

Menu

Flow Correction Temperature Units Temp Input

AutoZero Temperature Values (FixVarNet)

Temp Comp Temperature Input

Display Filter Fixed Value (Variable)

25

4874 Fixed Value

The Fixed Value Menu allows the user to enter a temperature value for the flow calculations

This value will not be displayed on the LCD screen

Field Setup

Menu

Flow Correction Temperature Units Fixed Value

AutoZero Temperature Values (˚F)

Temp Comp Temperature Input

Display Filter Fixed Value (+068)

Display Filter 488

The Display Filter Menu allows the user to adjust the Display Filter rolling average algorithm by

setting the Sample Interval Time value in seconds and the number of rolling average Sample

Counts The adjustment range of the Sample Interval Time is 010 to 655 seconds in 010

increments The Sample Count range is 0 to 150 Sample Counts The Display Filter is

independent of the Process Output Filter Value (See Section 489)

Field Setup

Menu

Flow Correction Sample Interval Time

AutoZero (005)sec

Temp Comp (0-150) Sample Count

Display Filter (010)

Process Output Filter 489

The Process Output Filter Menu allows the user to adjust the Process Output Filters rolling

average algorithm by setting the Sample Interval Time value in seconds and the number of

rolling average Sample Counts The adjustment range of the Sample Interval Time is 010 to

655 seconds in 010 increments The Sample Count range is 0 to 150 Sample Counts The

Process Output Filter is independent of the Display Filter Value (See Section 488)

Field Setup

Menu

Output Filter Sample Interval Time

Alarm Options (005)sec

Factory Defaults (0-150) Sample Count

(010)

26

HighLow Alarm Option 4810

The following menus for configuration of HighLow Alarms are only available if the HighLow

Alarm option is purchased

48101 Alarm Status

The Alarm Status allows the user to independently turn each alarm ON or OFF

Field Setup

Menu

Output Filter Alarm Status Low Alarm

Alarm Options Alarm Value (On)

Factory Defaults Alarm Delay High Alarm

(On)

48102 Alarm Values

The Alarm Value Menu allows the user to enter the Low or the High flow alarm value Alarm

values will be displayed in the same engineering units selected in the Eng Units Menu (see

Section 483)

- High Alarm Function The High Alarm activates if the flow exceeds the High Alarm

value and resets when the flow drops below the High Alarm Value

- Low Alarm Function The Low Alarm activates if the flow drops below the Low

Alarm Value and resets when the flow exceeds the Low Alarm Value

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Value

Alarm Options Alarm Value (000000)

Factory Defaults Alarm Delay Hi Alarm Value

(100000)

48103 Alarm Delay

The Alarm Delay Menu allows the user to enter an alarm delay of 0 to 999 seconds before an

alarm will be activated The alarm will be reset without a delay

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Delay

Alarm Options Alarm Value (000)Seconds

Factory Defaults Alarm Delay Hi Alarm Delay

(000)Seconds

27

Factory Defaults 4811

If parameter configuration changes have been made incorrectly to the AAON Airflow Signal

Processor all device settings can be restored to the original AAON factory settings by selecting

YES and pressing Enter in both the Set To Factory Defaults Menu and the Verify Set To Factory

Defaults Menu (see Table 7 below for a list of Saved Settings)

Field Setup

Menu

Output Filter Set To Verify Set To

Alarm Options Factory Defaults Factory Defaults

Factory Defaults

(No) (No)

Table 7 - Factory Defaults

Item Saved Setting Item Saved Setting

1 All Factory Calibration Points (12) 14 MAC Address

2 Area Factor 15 Instance Number

3 Operating Range 16 Engineering Units

4 4 Pt Flow Correction 17 Display Filter Values

5 Altitude 18 Output Filter

6 K-Factor 19 DP Display Format

7 Lockdown amp Delay Values 20 Output Calibration

8 Flow Correction 21 AutoZero Status

9 Flow Coefficient 22 AutoZero Interval

10 Min amp Max Temp Range Values 23 Temp Units

11 Alarm Status 24 Temp Input

12 Alarm Values 25 Temp Fixed Value

13 Alarm Delay 26 Baud Rate

28

49 TECH CONFIGURATION MENUS

To set parameters under the Tech Configuration Menu refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 491

through 4911 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

Area Factor 491

To convert the differential pressure signal from the AAON Airflow Station to a flow value the

Area Factor associated with the AAON Airflow Station has been preprogramed by the factory

If the Area Factor needs to be checked or reconfigured the correct Area Factor for the AAON

Airflow Station can be found on the AAON Airflow Station product label installed in the air

handling unit

Tech Config

Password 1000

Area Factor Area Factor

Min Calibration (FT2)

Span Calibration

Altitude (001000)

29

If the Area Factor is reconfigured and the new Area Factor causes the existing Operating Range

Value to be outside the new calculated Minimum or Maximum Full Scale Value the below

Warning Message will appear and the Operating Range will be reset to the new Maximum Full

Scale Value by pressing Enter The display will automatically jump to the Operating Range

Menu allowing the user to enter a new Operating Range Value This can be accomplished by

performing the steps under Section 481 See Area Factor Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Area Factor

(FT )

(001000)

Area Factor

(FT )

Accepted

(001200)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Area

Factor and pressing

the Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Area Factor Example-

2

2

30

Minimum Calibration 492

The Minimum Calibration Menu allows a user to perform a minimum transducer calibration

This value will be placed in a different memory location and used until a Return to Factory

Defaults is selected (see Section 4811)

(Caution Before performing a minimum calibration disconnect the Total (High) and Static

(Low) Pressure connections perform a minimum calibration and then reconnect the Total

and Static Pressure connections)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00000) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Span Calibration 493

The Span Calibration Menu allows the user to perform a span transducer calibration to eliminate

any possible transducer drift This value will be placed in a different memory location than the

Factory Span memory location and used until a Return to Factory Defaults is selected (see

Section 4811)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00570) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Altitude 494

The Altitude Menu allows the user to enter the specific altitude for the job for the density

calculations the job specific site Altitude has been preprogramed by the factory

Tech Config

Password 1000

Area Factor Altitude

Min Calibration

Span Calibration (0000)Ft

Altitude

31

If the Altitude is changed from the factory setting and the new Altitude causes the existing

Operating Range Value to be outside the new calculated Minimum or Maximum Full Scale

Value the below Warning Message will appear and the Operating Range will be reset to the new

Maximum Full Scale Value by pressing Enter The display will automatically jump to the

Operating Range Menu allowing the user to enter a new Operating Range Value This can be

accomplished by performing the steps under Section 481 See Altitude Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Altitude

(0000)Ft

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Altitude

and pressing the Enter

button will calculate

new Min amp Max Op

Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Altitude Example-

Altitude

Accepted

(0100)Ft

32

Process Output Calibration 495

4951 Minimum Calibration

The Minimum Calibration Menu allows the user to make output zero adjustments Monitor the

output and with each Up or Down key depression the output will increase or decrease by

001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

4952 Span Calibration

The Span Calibration Menu allows the user to make output span adjustments Span adjustments

require a low pressure air source adjusted to the Full Scale Value shown on the side label

Monitor the output and with each Up or Down button depression the output will increase or

decrease by 001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

Probe Coefficient 496

The Probe Correction Coefficient Menu allows the user to modify the formula constant of

109670 used for non-amplified Pitot-type flow sensors

Tech Config

Password 1000

Output Calibration Correction Coeff

Correction Coeff Probe

4PT Flow Corr (109670)

MAC Address (00109670)

33

Four Point Flow Correction 497

The Four Point Flow Correction Menu allows the user to make corrections to the display and

output signal at 20 increments between 20 and 80 of the Operating Range Value entered

The Displayed Value is a fixed value determined by the percentage of Operating Range The

Measured Value is the value determined by an independent balancerrsquos reading

Tech Config

Password 1000

Output Calibration 80000 CFM Displayed Value

Correction Coeff 60000 CFM 80000

4PT Flow Corr 40000 CFM Measured Value

MAC Address 20000 CFM 79500

80000 CFM Displayed Value

60000 CFM 60000

40000 CFM Measured Value

20000 CFM 60500

80000 CFM Displayed Value

60000 CFM 40000

40000 CFM Measured Value

20000 CFM 40100

80000 CFM Displayed Value

60000 CFM 20000

40000 CFM Measured Value

20000 CFM 19500

MAC Address (BACnet Communication Option) 498

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network The default is 002 For

additional information refer to Section 411

Tech Config

Password 1000

Output Calibration MAC Address

Correction Coeff (Range = 02 to 254)

4PT Flow Corr

MAC Address (002)

34

Instance Number (BACnet Communication Option) 499

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The default is 1002 For

additional information refer to Section 411

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (Default = 1002)

Instance Number

Modbus ID (01002)

Modbus ID (Modbus Communication Option) 4910

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network The default is 002 For

communication with WattMaster Controls the Modbus ID has been set by the factory to 009 for

outside airflow applications For additional information refer to the Section 411

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

Baud Rate (BACnet amp Modbus Communication Options) 4911

The Baud Rate Menu allows the user to set a unique network baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate Modbus communications supports

96 192 384 576 and 1152 Kbps baud rate The default is 384 Kbps For communication

with WattMaster Controls the Baud Rate has been set by the factory to 96 Kbps For additional

information refer to Section 411

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

35

410 WARNING MESSAGES

Input Pressure Overrange Message 4101

If the input pressure exceeds the entered Operating Range Value the following message will

appear on the display It will alternate between the process display and the error message until

the input falls below the Operating Range Value

- Caution -

Input Beyond

Operating Range

Selected

Transducer Calibration Message 4102

If during a transducer zero or span calibration process the transducer output pressure value

measured exceeds plusmn20 of the expected value the following message will appear on the display

Once the Enter button is pressed the display returns to the previous calibration menu

Value entered is

Outside Factory

set limits

(Press Enter)

Operating Range Message 4103

If the new values entered for Temperature Compensation Area Factor or Altitude (see Sections

487 491 and 494) causes the Operating Range Value to exceed the new calculated

Maximum Full Scale Value the following message will appear on the display

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

New Operating Range Message 4104

If a user enters a new Operating Range Value the following message will appear on the display

notifying the user that if any 4 PT Flow Correction Values (see Section 497) were previously

entered they will be reset The message allows the user to confirm that the Operating Range

change should be made To complete the Operating Range change the user must use the

UPDown buttons to change the NO to a YES and press the ENTER button

Value will

Reset 4PT

Flow Correction

Values

Make the Change

(NO)

(Press Enter)

36

411 NETWORK COMMUNICATION

The AAON Airflow Signal Processor can be ordered with BACnet Modbus or LonWorks

Communication For BACnet Communication the AAON Airflow Signal Processors utilize

MSTP (Master SlaveToken Passing) BACnet type protocol BACnet is implemented using

EIA-485 signaling standards through a shielded twisted pair wire operating at a baud rate of 96

Kbps to 768 Kbps Each device has a unique MAC Address ranging from 2 to 127 Refer to

Section 4113 for BACnet Protocol Implementation Conformance Statements (PICS) For

Modbus Communication the AAON Airflow Signal Processors utilize the Modbus ndash RTU Slave

protocol using EIA-485 signaling standards through a shielded twisted pair wire operating at a

baud rate of 96 Kbps to 1152 Kbps Each device has a unique Modbus ID ranging from 1 to

254 Refer to Section 4114 for Modbus software configuration parameters For LonWorks

Communication each AAON Airflow Signal Processor has a unique Neuron Chip ID which is

loaded on the network by pressing a service switch located on the main board (see Section

4111 Figure 7) The LonWorks network utilizes a shielded twisted pair wire operating at a

fixed baud rate of 78 Kbps Refer to Section 4115 for LonWorks network variables

Sections 4111 and 4112 contain procedures for electrical connection of the AAON Airflow

Signal Processor to the network and for configuring the required communication parameters

Electrical Connection 4111

The following procedure outlines the steps for installing the interface wiring for network

communication Network wire should be low capacitance shielded 22 or 24 AWG twisted pair

with PVC jacket such as Belden Part numbers 9841 3105A or equivalent

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Verify that the Power Switch (S3) is in the OFF position and install the interface

wiring for Pins 9 and 10 as shown in Figure 7 If multiple AAON Airflow Signal

Processors will be connected to the same network see Figure 8 for connecting

multiple devices For network systems that require all devices to have a common

signal ground refer to Figure 9 for electrical connection The J2 electrical

connector has a removable terminal block for ease of installing the interface

wiring

Step 4 For proper operation of BACnet and Modbus communication networks the

device that is electrically installed at the end of the network may require the

Terminator Switch be moved to the ON position to prevent line and data

reflection If Terminator is required it must be applied to both physical ends of

the network All other devices should have the Terminator Switch in the OFF

position The communication board is located on the back side of the main

AAON Airflow Signal Processor board See Figure 10 below for Terminator

Switch location on the communication board

Step 5 For LonWorks Communication refer to Figure 7 for the location of the Lon

Service Pin

37

Step 6 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 7 Configure the required parameters as outlined in Section 4112

Step 8 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

RP1

S3

NETWORK

COMMUNICATION+

-

LON

SERVICE PIN

Figure 7 - Network Communication Electrical Connection

38

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

AAON AIRFLOW

SIGNAL PROCESSOR

CONNECT ONLY ONE END OF SHIELD

WIRE TO EARTH GROUND AS SHOWN

SET TERMINATOR SWITCH

ON IF REQUIRED

NETWORK

COMMUNICATIONS

NETWORK

CONNECT SHIELD

WIRES TOGETHER

CONNECT SHIELD

WIRES TOGETHER

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not

Requiring Common Signal Grounds

Note If using two conductor communication wire use the shield wire to connect all device signal grounds together as shown in the figure below If using three conductor communication wire use the 3rd conductor to connect all device signal grounds together and connect one side of the shield to earth ground

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

SIGNAL

GROUND

8

J2

SIGNAL

GROUND

8

J28

J2

USE SHIELD WIRE OR 3RD CONDUCTOR TO

CONNECT DEVICE SIGNAL GROUND TO

NETWORK SIGNAL GROUND

SET TERMINATOR SWITCH

ON IF REQUIRED

AAON AIRFLOW

SIGNAL PROCESSOR

NETWORK

COMMUNICATIONS

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

SIGNAL

GROUND

SIGNAL

GROUND

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds

39

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location

COMMUNICATION BOARD ID

BOARD SERIAL NO

40

Parameter Configuration 4112

If BACnet or Modbus communication is ordered the associated settings will need to be

configured with the exception of Modbus communication with WattMaster Controls which has

been configured at the factory To set the parameters refer to the following procedure below

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 41121

through 41124 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

41121 MAC Address (BACnet Communication Option)

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network Each AAON Airflow Signal

Processor must have a unique MAC Address assigned ranging from 2 to 127

Tech Config

Password 1000

4PT Flow Corr MAC Address

MAC Address (Range = 02 to 254)

Instance Number

Modbus ID (002)

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 18: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

18

47 DISPLAY MENUS

Table 5 shows the Field Setup and Tech Configuration Menus The display will vary depending

upon the options purchased

Table 5 - Display Menus

Field Setup Menu

(Press ENTER Key)

Tech Configuration Menu

(Press UPDOWN Keys simultaneously)

(Enter Password number 1000)

(Press ENTER Key)

Operating Range Area Factor

Zero Calibration Min Calibration

Eng Units Span Calibration

Lockdown Temp Fixed Value

Flow Correction Altitude

AutoZero Output Calibration

Temp Comp Correction Coeff

Display Filter 4PT Flow Corr

Output Filter MAC Address (Optional)

Alarm Options (Optional) Instance Number (Optional)

Factory Defaults Modbus ID (Optional)

Baud Rate (Optional)

48 FIELD SETUP MENUS

To set parameters under the Field Setup Menus refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Field Setup Menu by depressing and holding the Enter Key for 5

seconds

Step 2 Once in the Field Setup Menu use the UpDown Keys to highlight the

required parameter for configuration as shown in Sections 481 through

4811 Press the Enter Key once to access the highlighted parameter

Menu

Step 3 Once in the parameter menu the parameter can be changed using

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Field

Setup Menu

Step 4 After all of the required parameters have been configured exit the Field

Setup Menu by pressing the ESC Key The Process Display (see Section

462) will then be displayed

19

Operating Range 481

The Operating Range allows the user to enter a value which will represent 100 of the process

output signal (5VDC 10VDC or 20mA) The Operating Range Value has been set by the

factory to equal 110 of the design supply flow rate unless this value is less than the Minimum

Full Scale Value allowed for the AAON Airflow Signal Processor The menu will display the

Minimum Full Scale Value allowed which is then entered as the Operating Range

Field Setup

Menu

Operating Range Operating Range

Zero Calibration ( ACFM )

Engineering Units (6000-12000)

Lockdown (010000)

Zero Pressure Calibration 482

The Zero Calibration Menu allows the user to perform a zero transducer calibration to eliminate

any transducer zero shift

(Caution Before performing a zero calibration disconnect the Total (High) and Static (Low)

pressure connections perform a zero calibration and then reconnect the Total and Static

pressure connections)

Field Setup

Menu

Operating Range Input Value CPU Taking

Zero Calibration (0000) Inch wc Samples

Engineering Units

Lockdown (Press Enter) (Please Wait)

Engineering Units 483

Table 6 lists the engineering units that are available for the user to select from for display

purposes Changing the engineering units will affect the process display and the alarm value

menus The default setting is ACFM

Field Setup

Menu

Operating Range Eng Units

Zero Calibration

Engineering Units (ACFM)

Lockdown

20

Table 6 - Engineering Units

Standard

Flow

Units

Actual

Flow

Units

SCFM ACFM

SCFH LS

SLS Am3S

Sm3S Am3M

Sm3M Am3HR

Sm3HR

Lockdown 484

Due to the high square root gain associated with very low delta p values the display and process

output are locked to a zero value until the input value reaches the specified Lockdown Value that

was entered Above the Lockdown Value the output is linear to air flow

4841 Lockdown Value

The Lockdown Value can be changed from 0 to 20 of Operating Range Value Lockdown

Values can be changed in 1 increments The recommended standard is 5

Field Setup

Menu

Operating Range Lockdown (0-20)

Zero Calibration (5)

Engineering Units Delay (0-20 sec)

Lockdown (2) Sec

4842 Lockdown Delay

The Lockdown Delay Menu allows the user to enter a lockdown time delay (0-20 seconds) that

will delay the display and output lockdown from occurring until the flow value or output value

has remained below the lockdown value for that duration

Field Setup

Menu

Operating Range Lockdown (0-20)

Zero Calibration (5)

Engineering Units Delay (0-20 sec)

Lockdown (2) Sec

21

Flow Correction 485

The Flow Correction Menu was incorporated into the AAON Airflow Signal Processor to give

the user an easy way to make corrections to the display and output without changing the

Operating Range Value entered by the factory or user The Flow Correction Menu would be

used to correct for a constant error from zero to the entered Operating Range Value

4851 Flow Correction (K-Factor)

If the user knows the change required to match the balancers reading select the K-Factor

Menu and enter this value for the K-Factor The minimum and maximum allowable K-Factor

Value is displayed in the K-Factor Menu

Field Setup

Menu

Flow Correction Flow Correction

AutoZero K-Factor K-Factor Range

Temp Comp (085 13)

Display Filter K-Factor Calc K=(01000)

4852 Flow Correction (K-Factor Calculator)

If the new K-factor Value needs to be calculated select the K-Factor Calc Menu Enter the

Displayed Value on the AAON Airflow Signal Processor and actual Measured Value press

Enter and the change will be calculated and stored as the new K-Factor Value

Field Setup

Menu

Flow Correction Displayed Value

AutoZero K-Factor (000000)

Temp Comp Measured Value

Display Filter K-Factor Calc (000000)

-FLOW CORRECTION EXAMPLE-

The balancer is consistently measuring a value of 9500 CFM which is 500 CFM less than the

10000 CFM value on the AAON Airflow Signal Processor display The user would then

perform the following math function Measured Value Displayed Value = K-Factor so 9500

CFM 10000 CFM = 0950 The user would enter 0950 for the K-Factor Flow Correction If

the K-Factor Calculator is used the K- Factor Flow Correction would automatically update the K

Factor

AutoZero 486

The AutoZero feature corrects any zero offset caused by large ambient temperature changes

22

4861 AutoZero Status

The AutoZero Status Menu allows the user to turn the AutoZero function ON or OFF

Field Setup

Menu

Flow Correction AZ Status AZ Status

AutoZero AZ Interval (ONOFF)

Temp Comp AZ Test Interval

Display Filter (ON)

4862 AutoZero Interval

The AutoZero Interval Menu allows the user to select the AutoZero Interval from once an hour

to once a day in 1 hour increments Use the UPDOWN keys to select the interval value Upon

device power up an AutoZero cycle will occur after 20 seconds

Field Setup

Menu

Flow Correction AZ Status AZ Interval

AutoZero AZ Interval (1 TO 24HR)

Temp Comp AZ Test Interval

Display Filter (01)HR

4863 AutoZero Test Interval

For troubleshooting or testing the AutoZero function the AutoZero Test Interval Menu allows

the user to select an Auto Zero test frequency of once a minute to once every 30 minutes in 1

minute increments Use the UPDOWN keys to select the interval value If AutoZero Test

Interval is turned ON for more than 60 minutes it will automatically default to OFF and the

AutoZero Interval (see Section 4862) will be reactivated

Field Setup

Menu

Flow Correction AZ Status AZ Test Interval

AutoZero AZ Interval (OFF)

Temp Comp AZ Test Interval Interval

Display Filter (1)Min

Temperature Compensation 487

The Temperature Compensation option compensates the flow and velocity signal for density

changes caused by variations in the process air temperature An input signal from AAON

Temperature Transmitter is required see Section 33 for proper temperature transmitter

connection and Section 452 for temperature input signal configuration

23

4871 Temperature Units

The Temperature Units Menu allows the user to select the appropriate temperature units for the

job The default setting is ordmF

Field Setup

Menu

Flow Correction Temperature Units Units

AutoZero Temperature Values (ordmF ordmC)

Temp Comp Temperature Input

Display Filter Fixed Value (ordmF)

4872 Temperature Values

The Temperature Values Menu allows the factory or user to set the minimum and maximum

temperature range values that represent the input signal from the external temperature transmitter

or the building automation system Since the AAON Temperature Transmitter has been supplied

the minimum and maximum temperature range values of -30degF to 130degF have been

preprogramed

Field Setup

Menu

Flow Correction Temperature Units Minimum Value

AutoZero Temperature Values (-030)

Temp Comp Temperature Input Maximum Value

Display Filter Fixed Value (130)

If the temperature values are changed from the factory settings and the new temperature values

cause the existing Operating Range Value to be outside the new calculated Minimum or

Maximum Full Scale Value the below Warning Message will appear and the Operating Range

will be reset to the new Maximum Full Scale Value by pressing Enter The display will

automatically jump to the Operating Range Menu allowing the user to enter a new Operating

Range Value This can be accomplished by performing the steps under Section 481 See

Temperature Range Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

24

Minimum Value

(-000)

Maximum Value

(000)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Min amp

Max Temperature

value and pressing the

Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Temperature Range Example-

Minimum Value

(-000)

Accepted

(100)

4873 Temperature Input

The Temperature Input Menu allows the user to select between three temperature input options

(Fixed Variable and Network) for the flow calculations Since the AAON Temperature

Transmitter has been supplied Variable has been selected If Fixed is selected the default

temperature value entered in the Fixed Value Menu (see Section 4874) is used If Net is

selected the temperature input signal is obtained through network communications The Net

option is only available if one of the communication options is ordered The temperature value

is only displayed on the LCD screen if the Temperature Input is set to Variable or Network

Field Setup

Menu

Flow Correction Temperature Units Temp Input

AutoZero Temperature Values (FixVarNet)

Temp Comp Temperature Input

Display Filter Fixed Value (Variable)

25

4874 Fixed Value

The Fixed Value Menu allows the user to enter a temperature value for the flow calculations

This value will not be displayed on the LCD screen

Field Setup

Menu

Flow Correction Temperature Units Fixed Value

AutoZero Temperature Values (˚F)

Temp Comp Temperature Input

Display Filter Fixed Value (+068)

Display Filter 488

The Display Filter Menu allows the user to adjust the Display Filter rolling average algorithm by

setting the Sample Interval Time value in seconds and the number of rolling average Sample

Counts The adjustment range of the Sample Interval Time is 010 to 655 seconds in 010

increments The Sample Count range is 0 to 150 Sample Counts The Display Filter is

independent of the Process Output Filter Value (See Section 489)

Field Setup

Menu

Flow Correction Sample Interval Time

AutoZero (005)sec

Temp Comp (0-150) Sample Count

Display Filter (010)

Process Output Filter 489

The Process Output Filter Menu allows the user to adjust the Process Output Filters rolling

average algorithm by setting the Sample Interval Time value in seconds and the number of

rolling average Sample Counts The adjustment range of the Sample Interval Time is 010 to

655 seconds in 010 increments The Sample Count range is 0 to 150 Sample Counts The

Process Output Filter is independent of the Display Filter Value (See Section 488)

Field Setup

Menu

Output Filter Sample Interval Time

Alarm Options (005)sec

Factory Defaults (0-150) Sample Count

(010)

26

HighLow Alarm Option 4810

The following menus for configuration of HighLow Alarms are only available if the HighLow

Alarm option is purchased

48101 Alarm Status

The Alarm Status allows the user to independently turn each alarm ON or OFF

Field Setup

Menu

Output Filter Alarm Status Low Alarm

Alarm Options Alarm Value (On)

Factory Defaults Alarm Delay High Alarm

(On)

48102 Alarm Values

The Alarm Value Menu allows the user to enter the Low or the High flow alarm value Alarm

values will be displayed in the same engineering units selected in the Eng Units Menu (see

Section 483)

- High Alarm Function The High Alarm activates if the flow exceeds the High Alarm

value and resets when the flow drops below the High Alarm Value

- Low Alarm Function The Low Alarm activates if the flow drops below the Low

Alarm Value and resets when the flow exceeds the Low Alarm Value

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Value

Alarm Options Alarm Value (000000)

Factory Defaults Alarm Delay Hi Alarm Value

(100000)

48103 Alarm Delay

The Alarm Delay Menu allows the user to enter an alarm delay of 0 to 999 seconds before an

alarm will be activated The alarm will be reset without a delay

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Delay

Alarm Options Alarm Value (000)Seconds

Factory Defaults Alarm Delay Hi Alarm Delay

(000)Seconds

27

Factory Defaults 4811

If parameter configuration changes have been made incorrectly to the AAON Airflow Signal

Processor all device settings can be restored to the original AAON factory settings by selecting

YES and pressing Enter in both the Set To Factory Defaults Menu and the Verify Set To Factory

Defaults Menu (see Table 7 below for a list of Saved Settings)

Field Setup

Menu

Output Filter Set To Verify Set To

Alarm Options Factory Defaults Factory Defaults

Factory Defaults

(No) (No)

Table 7 - Factory Defaults

Item Saved Setting Item Saved Setting

1 All Factory Calibration Points (12) 14 MAC Address

2 Area Factor 15 Instance Number

3 Operating Range 16 Engineering Units

4 4 Pt Flow Correction 17 Display Filter Values

5 Altitude 18 Output Filter

6 K-Factor 19 DP Display Format

7 Lockdown amp Delay Values 20 Output Calibration

8 Flow Correction 21 AutoZero Status

9 Flow Coefficient 22 AutoZero Interval

10 Min amp Max Temp Range Values 23 Temp Units

11 Alarm Status 24 Temp Input

12 Alarm Values 25 Temp Fixed Value

13 Alarm Delay 26 Baud Rate

28

49 TECH CONFIGURATION MENUS

To set parameters under the Tech Configuration Menu refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 491

through 4911 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

Area Factor 491

To convert the differential pressure signal from the AAON Airflow Station to a flow value the

Area Factor associated with the AAON Airflow Station has been preprogramed by the factory

If the Area Factor needs to be checked or reconfigured the correct Area Factor for the AAON

Airflow Station can be found on the AAON Airflow Station product label installed in the air

handling unit

Tech Config

Password 1000

Area Factor Area Factor

Min Calibration (FT2)

Span Calibration

Altitude (001000)

29

If the Area Factor is reconfigured and the new Area Factor causes the existing Operating Range

Value to be outside the new calculated Minimum or Maximum Full Scale Value the below

Warning Message will appear and the Operating Range will be reset to the new Maximum Full

Scale Value by pressing Enter The display will automatically jump to the Operating Range

Menu allowing the user to enter a new Operating Range Value This can be accomplished by

performing the steps under Section 481 See Area Factor Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Area Factor

(FT )

(001000)

Area Factor

(FT )

Accepted

(001200)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Area

Factor and pressing

the Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Area Factor Example-

2

2

30

Minimum Calibration 492

The Minimum Calibration Menu allows a user to perform a minimum transducer calibration

This value will be placed in a different memory location and used until a Return to Factory

Defaults is selected (see Section 4811)

(Caution Before performing a minimum calibration disconnect the Total (High) and Static

(Low) Pressure connections perform a minimum calibration and then reconnect the Total

and Static Pressure connections)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00000) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Span Calibration 493

The Span Calibration Menu allows the user to perform a span transducer calibration to eliminate

any possible transducer drift This value will be placed in a different memory location than the

Factory Span memory location and used until a Return to Factory Defaults is selected (see

Section 4811)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00570) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Altitude 494

The Altitude Menu allows the user to enter the specific altitude for the job for the density

calculations the job specific site Altitude has been preprogramed by the factory

Tech Config

Password 1000

Area Factor Altitude

Min Calibration

Span Calibration (0000)Ft

Altitude

31

If the Altitude is changed from the factory setting and the new Altitude causes the existing

Operating Range Value to be outside the new calculated Minimum or Maximum Full Scale

Value the below Warning Message will appear and the Operating Range will be reset to the new

Maximum Full Scale Value by pressing Enter The display will automatically jump to the

Operating Range Menu allowing the user to enter a new Operating Range Value This can be

accomplished by performing the steps under Section 481 See Altitude Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Altitude

(0000)Ft

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Altitude

and pressing the Enter

button will calculate

new Min amp Max Op

Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Altitude Example-

Altitude

Accepted

(0100)Ft

32

Process Output Calibration 495

4951 Minimum Calibration

The Minimum Calibration Menu allows the user to make output zero adjustments Monitor the

output and with each Up or Down key depression the output will increase or decrease by

001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

4952 Span Calibration

The Span Calibration Menu allows the user to make output span adjustments Span adjustments

require a low pressure air source adjusted to the Full Scale Value shown on the side label

Monitor the output and with each Up or Down button depression the output will increase or

decrease by 001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

Probe Coefficient 496

The Probe Correction Coefficient Menu allows the user to modify the formula constant of

109670 used for non-amplified Pitot-type flow sensors

Tech Config

Password 1000

Output Calibration Correction Coeff

Correction Coeff Probe

4PT Flow Corr (109670)

MAC Address (00109670)

33

Four Point Flow Correction 497

The Four Point Flow Correction Menu allows the user to make corrections to the display and

output signal at 20 increments between 20 and 80 of the Operating Range Value entered

The Displayed Value is a fixed value determined by the percentage of Operating Range The

Measured Value is the value determined by an independent balancerrsquos reading

Tech Config

Password 1000

Output Calibration 80000 CFM Displayed Value

Correction Coeff 60000 CFM 80000

4PT Flow Corr 40000 CFM Measured Value

MAC Address 20000 CFM 79500

80000 CFM Displayed Value

60000 CFM 60000

40000 CFM Measured Value

20000 CFM 60500

80000 CFM Displayed Value

60000 CFM 40000

40000 CFM Measured Value

20000 CFM 40100

80000 CFM Displayed Value

60000 CFM 20000

40000 CFM Measured Value

20000 CFM 19500

MAC Address (BACnet Communication Option) 498

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network The default is 002 For

additional information refer to Section 411

Tech Config

Password 1000

Output Calibration MAC Address

Correction Coeff (Range = 02 to 254)

4PT Flow Corr

MAC Address (002)

34

Instance Number (BACnet Communication Option) 499

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The default is 1002 For

additional information refer to Section 411

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (Default = 1002)

Instance Number

Modbus ID (01002)

Modbus ID (Modbus Communication Option) 4910

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network The default is 002 For

communication with WattMaster Controls the Modbus ID has been set by the factory to 009 for

outside airflow applications For additional information refer to the Section 411

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

Baud Rate (BACnet amp Modbus Communication Options) 4911

The Baud Rate Menu allows the user to set a unique network baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate Modbus communications supports

96 192 384 576 and 1152 Kbps baud rate The default is 384 Kbps For communication

with WattMaster Controls the Baud Rate has been set by the factory to 96 Kbps For additional

information refer to Section 411

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

35

410 WARNING MESSAGES

Input Pressure Overrange Message 4101

If the input pressure exceeds the entered Operating Range Value the following message will

appear on the display It will alternate between the process display and the error message until

the input falls below the Operating Range Value

- Caution -

Input Beyond

Operating Range

Selected

Transducer Calibration Message 4102

If during a transducer zero or span calibration process the transducer output pressure value

measured exceeds plusmn20 of the expected value the following message will appear on the display

Once the Enter button is pressed the display returns to the previous calibration menu

Value entered is

Outside Factory

set limits

(Press Enter)

Operating Range Message 4103

If the new values entered for Temperature Compensation Area Factor or Altitude (see Sections

487 491 and 494) causes the Operating Range Value to exceed the new calculated

Maximum Full Scale Value the following message will appear on the display

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

New Operating Range Message 4104

If a user enters a new Operating Range Value the following message will appear on the display

notifying the user that if any 4 PT Flow Correction Values (see Section 497) were previously

entered they will be reset The message allows the user to confirm that the Operating Range

change should be made To complete the Operating Range change the user must use the

UPDown buttons to change the NO to a YES and press the ENTER button

Value will

Reset 4PT

Flow Correction

Values

Make the Change

(NO)

(Press Enter)

36

411 NETWORK COMMUNICATION

The AAON Airflow Signal Processor can be ordered with BACnet Modbus or LonWorks

Communication For BACnet Communication the AAON Airflow Signal Processors utilize

MSTP (Master SlaveToken Passing) BACnet type protocol BACnet is implemented using

EIA-485 signaling standards through a shielded twisted pair wire operating at a baud rate of 96

Kbps to 768 Kbps Each device has a unique MAC Address ranging from 2 to 127 Refer to

Section 4113 for BACnet Protocol Implementation Conformance Statements (PICS) For

Modbus Communication the AAON Airflow Signal Processors utilize the Modbus ndash RTU Slave

protocol using EIA-485 signaling standards through a shielded twisted pair wire operating at a

baud rate of 96 Kbps to 1152 Kbps Each device has a unique Modbus ID ranging from 1 to

254 Refer to Section 4114 for Modbus software configuration parameters For LonWorks

Communication each AAON Airflow Signal Processor has a unique Neuron Chip ID which is

loaded on the network by pressing a service switch located on the main board (see Section

4111 Figure 7) The LonWorks network utilizes a shielded twisted pair wire operating at a

fixed baud rate of 78 Kbps Refer to Section 4115 for LonWorks network variables

Sections 4111 and 4112 contain procedures for electrical connection of the AAON Airflow

Signal Processor to the network and for configuring the required communication parameters

Electrical Connection 4111

The following procedure outlines the steps for installing the interface wiring for network

communication Network wire should be low capacitance shielded 22 or 24 AWG twisted pair

with PVC jacket such as Belden Part numbers 9841 3105A or equivalent

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Verify that the Power Switch (S3) is in the OFF position and install the interface

wiring for Pins 9 and 10 as shown in Figure 7 If multiple AAON Airflow Signal

Processors will be connected to the same network see Figure 8 for connecting

multiple devices For network systems that require all devices to have a common

signal ground refer to Figure 9 for electrical connection The J2 electrical

connector has a removable terminal block for ease of installing the interface

wiring

Step 4 For proper operation of BACnet and Modbus communication networks the

device that is electrically installed at the end of the network may require the

Terminator Switch be moved to the ON position to prevent line and data

reflection If Terminator is required it must be applied to both physical ends of

the network All other devices should have the Terminator Switch in the OFF

position The communication board is located on the back side of the main

AAON Airflow Signal Processor board See Figure 10 below for Terminator

Switch location on the communication board

Step 5 For LonWorks Communication refer to Figure 7 for the location of the Lon

Service Pin

37

Step 6 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 7 Configure the required parameters as outlined in Section 4112

Step 8 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

RP1

S3

NETWORK

COMMUNICATION+

-

LON

SERVICE PIN

Figure 7 - Network Communication Electrical Connection

38

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

AAON AIRFLOW

SIGNAL PROCESSOR

CONNECT ONLY ONE END OF SHIELD

WIRE TO EARTH GROUND AS SHOWN

SET TERMINATOR SWITCH

ON IF REQUIRED

NETWORK

COMMUNICATIONS

NETWORK

CONNECT SHIELD

WIRES TOGETHER

CONNECT SHIELD

WIRES TOGETHER

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not

Requiring Common Signal Grounds

Note If using two conductor communication wire use the shield wire to connect all device signal grounds together as shown in the figure below If using three conductor communication wire use the 3rd conductor to connect all device signal grounds together and connect one side of the shield to earth ground

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

SIGNAL

GROUND

8

J2

SIGNAL

GROUND

8

J28

J2

USE SHIELD WIRE OR 3RD CONDUCTOR TO

CONNECT DEVICE SIGNAL GROUND TO

NETWORK SIGNAL GROUND

SET TERMINATOR SWITCH

ON IF REQUIRED

AAON AIRFLOW

SIGNAL PROCESSOR

NETWORK

COMMUNICATIONS

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

SIGNAL

GROUND

SIGNAL

GROUND

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds

39

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location

COMMUNICATION BOARD ID

BOARD SERIAL NO

40

Parameter Configuration 4112

If BACnet or Modbus communication is ordered the associated settings will need to be

configured with the exception of Modbus communication with WattMaster Controls which has

been configured at the factory To set the parameters refer to the following procedure below

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 41121

through 41124 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

41121 MAC Address (BACnet Communication Option)

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network Each AAON Airflow Signal

Processor must have a unique MAC Address assigned ranging from 2 to 127

Tech Config

Password 1000

4PT Flow Corr MAC Address

MAC Address (Range = 02 to 254)

Instance Number

Modbus ID (002)

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 19: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

19

Operating Range 481

The Operating Range allows the user to enter a value which will represent 100 of the process

output signal (5VDC 10VDC or 20mA) The Operating Range Value has been set by the

factory to equal 110 of the design supply flow rate unless this value is less than the Minimum

Full Scale Value allowed for the AAON Airflow Signal Processor The menu will display the

Minimum Full Scale Value allowed which is then entered as the Operating Range

Field Setup

Menu

Operating Range Operating Range

Zero Calibration ( ACFM )

Engineering Units (6000-12000)

Lockdown (010000)

Zero Pressure Calibration 482

The Zero Calibration Menu allows the user to perform a zero transducer calibration to eliminate

any transducer zero shift

(Caution Before performing a zero calibration disconnect the Total (High) and Static (Low)

pressure connections perform a zero calibration and then reconnect the Total and Static

pressure connections)

Field Setup

Menu

Operating Range Input Value CPU Taking

Zero Calibration (0000) Inch wc Samples

Engineering Units

Lockdown (Press Enter) (Please Wait)

Engineering Units 483

Table 6 lists the engineering units that are available for the user to select from for display

purposes Changing the engineering units will affect the process display and the alarm value

menus The default setting is ACFM

Field Setup

Menu

Operating Range Eng Units

Zero Calibration

Engineering Units (ACFM)

Lockdown

20

Table 6 - Engineering Units

Standard

Flow

Units

Actual

Flow

Units

SCFM ACFM

SCFH LS

SLS Am3S

Sm3S Am3M

Sm3M Am3HR

Sm3HR

Lockdown 484

Due to the high square root gain associated with very low delta p values the display and process

output are locked to a zero value until the input value reaches the specified Lockdown Value that

was entered Above the Lockdown Value the output is linear to air flow

4841 Lockdown Value

The Lockdown Value can be changed from 0 to 20 of Operating Range Value Lockdown

Values can be changed in 1 increments The recommended standard is 5

Field Setup

Menu

Operating Range Lockdown (0-20)

Zero Calibration (5)

Engineering Units Delay (0-20 sec)

Lockdown (2) Sec

4842 Lockdown Delay

The Lockdown Delay Menu allows the user to enter a lockdown time delay (0-20 seconds) that

will delay the display and output lockdown from occurring until the flow value or output value

has remained below the lockdown value for that duration

Field Setup

Menu

Operating Range Lockdown (0-20)

Zero Calibration (5)

Engineering Units Delay (0-20 sec)

Lockdown (2) Sec

21

Flow Correction 485

The Flow Correction Menu was incorporated into the AAON Airflow Signal Processor to give

the user an easy way to make corrections to the display and output without changing the

Operating Range Value entered by the factory or user The Flow Correction Menu would be

used to correct for a constant error from zero to the entered Operating Range Value

4851 Flow Correction (K-Factor)

If the user knows the change required to match the balancers reading select the K-Factor

Menu and enter this value for the K-Factor The minimum and maximum allowable K-Factor

Value is displayed in the K-Factor Menu

Field Setup

Menu

Flow Correction Flow Correction

AutoZero K-Factor K-Factor Range

Temp Comp (085 13)

Display Filter K-Factor Calc K=(01000)

4852 Flow Correction (K-Factor Calculator)

If the new K-factor Value needs to be calculated select the K-Factor Calc Menu Enter the

Displayed Value on the AAON Airflow Signal Processor and actual Measured Value press

Enter and the change will be calculated and stored as the new K-Factor Value

Field Setup

Menu

Flow Correction Displayed Value

AutoZero K-Factor (000000)

Temp Comp Measured Value

Display Filter K-Factor Calc (000000)

-FLOW CORRECTION EXAMPLE-

The balancer is consistently measuring a value of 9500 CFM which is 500 CFM less than the

10000 CFM value on the AAON Airflow Signal Processor display The user would then

perform the following math function Measured Value Displayed Value = K-Factor so 9500

CFM 10000 CFM = 0950 The user would enter 0950 for the K-Factor Flow Correction If

the K-Factor Calculator is used the K- Factor Flow Correction would automatically update the K

Factor

AutoZero 486

The AutoZero feature corrects any zero offset caused by large ambient temperature changes

22

4861 AutoZero Status

The AutoZero Status Menu allows the user to turn the AutoZero function ON or OFF

Field Setup

Menu

Flow Correction AZ Status AZ Status

AutoZero AZ Interval (ONOFF)

Temp Comp AZ Test Interval

Display Filter (ON)

4862 AutoZero Interval

The AutoZero Interval Menu allows the user to select the AutoZero Interval from once an hour

to once a day in 1 hour increments Use the UPDOWN keys to select the interval value Upon

device power up an AutoZero cycle will occur after 20 seconds

Field Setup

Menu

Flow Correction AZ Status AZ Interval

AutoZero AZ Interval (1 TO 24HR)

Temp Comp AZ Test Interval

Display Filter (01)HR

4863 AutoZero Test Interval

For troubleshooting or testing the AutoZero function the AutoZero Test Interval Menu allows

the user to select an Auto Zero test frequency of once a minute to once every 30 minutes in 1

minute increments Use the UPDOWN keys to select the interval value If AutoZero Test

Interval is turned ON for more than 60 minutes it will automatically default to OFF and the

AutoZero Interval (see Section 4862) will be reactivated

Field Setup

Menu

Flow Correction AZ Status AZ Test Interval

AutoZero AZ Interval (OFF)

Temp Comp AZ Test Interval Interval

Display Filter (1)Min

Temperature Compensation 487

The Temperature Compensation option compensates the flow and velocity signal for density

changes caused by variations in the process air temperature An input signal from AAON

Temperature Transmitter is required see Section 33 for proper temperature transmitter

connection and Section 452 for temperature input signal configuration

23

4871 Temperature Units

The Temperature Units Menu allows the user to select the appropriate temperature units for the

job The default setting is ordmF

Field Setup

Menu

Flow Correction Temperature Units Units

AutoZero Temperature Values (ordmF ordmC)

Temp Comp Temperature Input

Display Filter Fixed Value (ordmF)

4872 Temperature Values

The Temperature Values Menu allows the factory or user to set the minimum and maximum

temperature range values that represent the input signal from the external temperature transmitter

or the building automation system Since the AAON Temperature Transmitter has been supplied

the minimum and maximum temperature range values of -30degF to 130degF have been

preprogramed

Field Setup

Menu

Flow Correction Temperature Units Minimum Value

AutoZero Temperature Values (-030)

Temp Comp Temperature Input Maximum Value

Display Filter Fixed Value (130)

If the temperature values are changed from the factory settings and the new temperature values

cause the existing Operating Range Value to be outside the new calculated Minimum or

Maximum Full Scale Value the below Warning Message will appear and the Operating Range

will be reset to the new Maximum Full Scale Value by pressing Enter The display will

automatically jump to the Operating Range Menu allowing the user to enter a new Operating

Range Value This can be accomplished by performing the steps under Section 481 See

Temperature Range Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

24

Minimum Value

(-000)

Maximum Value

(000)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Min amp

Max Temperature

value and pressing the

Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Temperature Range Example-

Minimum Value

(-000)

Accepted

(100)

4873 Temperature Input

The Temperature Input Menu allows the user to select between three temperature input options

(Fixed Variable and Network) for the flow calculations Since the AAON Temperature

Transmitter has been supplied Variable has been selected If Fixed is selected the default

temperature value entered in the Fixed Value Menu (see Section 4874) is used If Net is

selected the temperature input signal is obtained through network communications The Net

option is only available if one of the communication options is ordered The temperature value

is only displayed on the LCD screen if the Temperature Input is set to Variable or Network

Field Setup

Menu

Flow Correction Temperature Units Temp Input

AutoZero Temperature Values (FixVarNet)

Temp Comp Temperature Input

Display Filter Fixed Value (Variable)

25

4874 Fixed Value

The Fixed Value Menu allows the user to enter a temperature value for the flow calculations

This value will not be displayed on the LCD screen

Field Setup

Menu

Flow Correction Temperature Units Fixed Value

AutoZero Temperature Values (˚F)

Temp Comp Temperature Input

Display Filter Fixed Value (+068)

Display Filter 488

The Display Filter Menu allows the user to adjust the Display Filter rolling average algorithm by

setting the Sample Interval Time value in seconds and the number of rolling average Sample

Counts The adjustment range of the Sample Interval Time is 010 to 655 seconds in 010

increments The Sample Count range is 0 to 150 Sample Counts The Display Filter is

independent of the Process Output Filter Value (See Section 489)

Field Setup

Menu

Flow Correction Sample Interval Time

AutoZero (005)sec

Temp Comp (0-150) Sample Count

Display Filter (010)

Process Output Filter 489

The Process Output Filter Menu allows the user to adjust the Process Output Filters rolling

average algorithm by setting the Sample Interval Time value in seconds and the number of

rolling average Sample Counts The adjustment range of the Sample Interval Time is 010 to

655 seconds in 010 increments The Sample Count range is 0 to 150 Sample Counts The

Process Output Filter is independent of the Display Filter Value (See Section 488)

Field Setup

Menu

Output Filter Sample Interval Time

Alarm Options (005)sec

Factory Defaults (0-150) Sample Count

(010)

26

HighLow Alarm Option 4810

The following menus for configuration of HighLow Alarms are only available if the HighLow

Alarm option is purchased

48101 Alarm Status

The Alarm Status allows the user to independently turn each alarm ON or OFF

Field Setup

Menu

Output Filter Alarm Status Low Alarm

Alarm Options Alarm Value (On)

Factory Defaults Alarm Delay High Alarm

(On)

48102 Alarm Values

The Alarm Value Menu allows the user to enter the Low or the High flow alarm value Alarm

values will be displayed in the same engineering units selected in the Eng Units Menu (see

Section 483)

- High Alarm Function The High Alarm activates if the flow exceeds the High Alarm

value and resets when the flow drops below the High Alarm Value

- Low Alarm Function The Low Alarm activates if the flow drops below the Low

Alarm Value and resets when the flow exceeds the Low Alarm Value

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Value

Alarm Options Alarm Value (000000)

Factory Defaults Alarm Delay Hi Alarm Value

(100000)

48103 Alarm Delay

The Alarm Delay Menu allows the user to enter an alarm delay of 0 to 999 seconds before an

alarm will be activated The alarm will be reset without a delay

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Delay

Alarm Options Alarm Value (000)Seconds

Factory Defaults Alarm Delay Hi Alarm Delay

(000)Seconds

27

Factory Defaults 4811

If parameter configuration changes have been made incorrectly to the AAON Airflow Signal

Processor all device settings can be restored to the original AAON factory settings by selecting

YES and pressing Enter in both the Set To Factory Defaults Menu and the Verify Set To Factory

Defaults Menu (see Table 7 below for a list of Saved Settings)

Field Setup

Menu

Output Filter Set To Verify Set To

Alarm Options Factory Defaults Factory Defaults

Factory Defaults

(No) (No)

Table 7 - Factory Defaults

Item Saved Setting Item Saved Setting

1 All Factory Calibration Points (12) 14 MAC Address

2 Area Factor 15 Instance Number

3 Operating Range 16 Engineering Units

4 4 Pt Flow Correction 17 Display Filter Values

5 Altitude 18 Output Filter

6 K-Factor 19 DP Display Format

7 Lockdown amp Delay Values 20 Output Calibration

8 Flow Correction 21 AutoZero Status

9 Flow Coefficient 22 AutoZero Interval

10 Min amp Max Temp Range Values 23 Temp Units

11 Alarm Status 24 Temp Input

12 Alarm Values 25 Temp Fixed Value

13 Alarm Delay 26 Baud Rate

28

49 TECH CONFIGURATION MENUS

To set parameters under the Tech Configuration Menu refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 491

through 4911 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

Area Factor 491

To convert the differential pressure signal from the AAON Airflow Station to a flow value the

Area Factor associated with the AAON Airflow Station has been preprogramed by the factory

If the Area Factor needs to be checked or reconfigured the correct Area Factor for the AAON

Airflow Station can be found on the AAON Airflow Station product label installed in the air

handling unit

Tech Config

Password 1000

Area Factor Area Factor

Min Calibration (FT2)

Span Calibration

Altitude (001000)

29

If the Area Factor is reconfigured and the new Area Factor causes the existing Operating Range

Value to be outside the new calculated Minimum or Maximum Full Scale Value the below

Warning Message will appear and the Operating Range will be reset to the new Maximum Full

Scale Value by pressing Enter The display will automatically jump to the Operating Range

Menu allowing the user to enter a new Operating Range Value This can be accomplished by

performing the steps under Section 481 See Area Factor Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Area Factor

(FT )

(001000)

Area Factor

(FT )

Accepted

(001200)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Area

Factor and pressing

the Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Area Factor Example-

2

2

30

Minimum Calibration 492

The Minimum Calibration Menu allows a user to perform a minimum transducer calibration

This value will be placed in a different memory location and used until a Return to Factory

Defaults is selected (see Section 4811)

(Caution Before performing a minimum calibration disconnect the Total (High) and Static

(Low) Pressure connections perform a minimum calibration and then reconnect the Total

and Static Pressure connections)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00000) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Span Calibration 493

The Span Calibration Menu allows the user to perform a span transducer calibration to eliminate

any possible transducer drift This value will be placed in a different memory location than the

Factory Span memory location and used until a Return to Factory Defaults is selected (see

Section 4811)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00570) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Altitude 494

The Altitude Menu allows the user to enter the specific altitude for the job for the density

calculations the job specific site Altitude has been preprogramed by the factory

Tech Config

Password 1000

Area Factor Altitude

Min Calibration

Span Calibration (0000)Ft

Altitude

31

If the Altitude is changed from the factory setting and the new Altitude causes the existing

Operating Range Value to be outside the new calculated Minimum or Maximum Full Scale

Value the below Warning Message will appear and the Operating Range will be reset to the new

Maximum Full Scale Value by pressing Enter The display will automatically jump to the

Operating Range Menu allowing the user to enter a new Operating Range Value This can be

accomplished by performing the steps under Section 481 See Altitude Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Altitude

(0000)Ft

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Altitude

and pressing the Enter

button will calculate

new Min amp Max Op

Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Altitude Example-

Altitude

Accepted

(0100)Ft

32

Process Output Calibration 495

4951 Minimum Calibration

The Minimum Calibration Menu allows the user to make output zero adjustments Monitor the

output and with each Up or Down key depression the output will increase or decrease by

001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

4952 Span Calibration

The Span Calibration Menu allows the user to make output span adjustments Span adjustments

require a low pressure air source adjusted to the Full Scale Value shown on the side label

Monitor the output and with each Up or Down button depression the output will increase or

decrease by 001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

Probe Coefficient 496

The Probe Correction Coefficient Menu allows the user to modify the formula constant of

109670 used for non-amplified Pitot-type flow sensors

Tech Config

Password 1000

Output Calibration Correction Coeff

Correction Coeff Probe

4PT Flow Corr (109670)

MAC Address (00109670)

33

Four Point Flow Correction 497

The Four Point Flow Correction Menu allows the user to make corrections to the display and

output signal at 20 increments between 20 and 80 of the Operating Range Value entered

The Displayed Value is a fixed value determined by the percentage of Operating Range The

Measured Value is the value determined by an independent balancerrsquos reading

Tech Config

Password 1000

Output Calibration 80000 CFM Displayed Value

Correction Coeff 60000 CFM 80000

4PT Flow Corr 40000 CFM Measured Value

MAC Address 20000 CFM 79500

80000 CFM Displayed Value

60000 CFM 60000

40000 CFM Measured Value

20000 CFM 60500

80000 CFM Displayed Value

60000 CFM 40000

40000 CFM Measured Value

20000 CFM 40100

80000 CFM Displayed Value

60000 CFM 20000

40000 CFM Measured Value

20000 CFM 19500

MAC Address (BACnet Communication Option) 498

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network The default is 002 For

additional information refer to Section 411

Tech Config

Password 1000

Output Calibration MAC Address

Correction Coeff (Range = 02 to 254)

4PT Flow Corr

MAC Address (002)

34

Instance Number (BACnet Communication Option) 499

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The default is 1002 For

additional information refer to Section 411

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (Default = 1002)

Instance Number

Modbus ID (01002)

Modbus ID (Modbus Communication Option) 4910

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network The default is 002 For

communication with WattMaster Controls the Modbus ID has been set by the factory to 009 for

outside airflow applications For additional information refer to the Section 411

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

Baud Rate (BACnet amp Modbus Communication Options) 4911

The Baud Rate Menu allows the user to set a unique network baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate Modbus communications supports

96 192 384 576 and 1152 Kbps baud rate The default is 384 Kbps For communication

with WattMaster Controls the Baud Rate has been set by the factory to 96 Kbps For additional

information refer to Section 411

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

35

410 WARNING MESSAGES

Input Pressure Overrange Message 4101

If the input pressure exceeds the entered Operating Range Value the following message will

appear on the display It will alternate between the process display and the error message until

the input falls below the Operating Range Value

- Caution -

Input Beyond

Operating Range

Selected

Transducer Calibration Message 4102

If during a transducer zero or span calibration process the transducer output pressure value

measured exceeds plusmn20 of the expected value the following message will appear on the display

Once the Enter button is pressed the display returns to the previous calibration menu

Value entered is

Outside Factory

set limits

(Press Enter)

Operating Range Message 4103

If the new values entered for Temperature Compensation Area Factor or Altitude (see Sections

487 491 and 494) causes the Operating Range Value to exceed the new calculated

Maximum Full Scale Value the following message will appear on the display

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

New Operating Range Message 4104

If a user enters a new Operating Range Value the following message will appear on the display

notifying the user that if any 4 PT Flow Correction Values (see Section 497) were previously

entered they will be reset The message allows the user to confirm that the Operating Range

change should be made To complete the Operating Range change the user must use the

UPDown buttons to change the NO to a YES and press the ENTER button

Value will

Reset 4PT

Flow Correction

Values

Make the Change

(NO)

(Press Enter)

36

411 NETWORK COMMUNICATION

The AAON Airflow Signal Processor can be ordered with BACnet Modbus or LonWorks

Communication For BACnet Communication the AAON Airflow Signal Processors utilize

MSTP (Master SlaveToken Passing) BACnet type protocol BACnet is implemented using

EIA-485 signaling standards through a shielded twisted pair wire operating at a baud rate of 96

Kbps to 768 Kbps Each device has a unique MAC Address ranging from 2 to 127 Refer to

Section 4113 for BACnet Protocol Implementation Conformance Statements (PICS) For

Modbus Communication the AAON Airflow Signal Processors utilize the Modbus ndash RTU Slave

protocol using EIA-485 signaling standards through a shielded twisted pair wire operating at a

baud rate of 96 Kbps to 1152 Kbps Each device has a unique Modbus ID ranging from 1 to

254 Refer to Section 4114 for Modbus software configuration parameters For LonWorks

Communication each AAON Airflow Signal Processor has a unique Neuron Chip ID which is

loaded on the network by pressing a service switch located on the main board (see Section

4111 Figure 7) The LonWorks network utilizes a shielded twisted pair wire operating at a

fixed baud rate of 78 Kbps Refer to Section 4115 for LonWorks network variables

Sections 4111 and 4112 contain procedures for electrical connection of the AAON Airflow

Signal Processor to the network and for configuring the required communication parameters

Electrical Connection 4111

The following procedure outlines the steps for installing the interface wiring for network

communication Network wire should be low capacitance shielded 22 or 24 AWG twisted pair

with PVC jacket such as Belden Part numbers 9841 3105A or equivalent

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Verify that the Power Switch (S3) is in the OFF position and install the interface

wiring for Pins 9 and 10 as shown in Figure 7 If multiple AAON Airflow Signal

Processors will be connected to the same network see Figure 8 for connecting

multiple devices For network systems that require all devices to have a common

signal ground refer to Figure 9 for electrical connection The J2 electrical

connector has a removable terminal block for ease of installing the interface

wiring

Step 4 For proper operation of BACnet and Modbus communication networks the

device that is electrically installed at the end of the network may require the

Terminator Switch be moved to the ON position to prevent line and data

reflection If Terminator is required it must be applied to both physical ends of

the network All other devices should have the Terminator Switch in the OFF

position The communication board is located on the back side of the main

AAON Airflow Signal Processor board See Figure 10 below for Terminator

Switch location on the communication board

Step 5 For LonWorks Communication refer to Figure 7 for the location of the Lon

Service Pin

37

Step 6 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 7 Configure the required parameters as outlined in Section 4112

Step 8 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

RP1

S3

NETWORK

COMMUNICATION+

-

LON

SERVICE PIN

Figure 7 - Network Communication Electrical Connection

38

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

AAON AIRFLOW

SIGNAL PROCESSOR

CONNECT ONLY ONE END OF SHIELD

WIRE TO EARTH GROUND AS SHOWN

SET TERMINATOR SWITCH

ON IF REQUIRED

NETWORK

COMMUNICATIONS

NETWORK

CONNECT SHIELD

WIRES TOGETHER

CONNECT SHIELD

WIRES TOGETHER

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not

Requiring Common Signal Grounds

Note If using two conductor communication wire use the shield wire to connect all device signal grounds together as shown in the figure below If using three conductor communication wire use the 3rd conductor to connect all device signal grounds together and connect one side of the shield to earth ground

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

SIGNAL

GROUND

8

J2

SIGNAL

GROUND

8

J28

J2

USE SHIELD WIRE OR 3RD CONDUCTOR TO

CONNECT DEVICE SIGNAL GROUND TO

NETWORK SIGNAL GROUND

SET TERMINATOR SWITCH

ON IF REQUIRED

AAON AIRFLOW

SIGNAL PROCESSOR

NETWORK

COMMUNICATIONS

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

SIGNAL

GROUND

SIGNAL

GROUND

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds

39

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location

COMMUNICATION BOARD ID

BOARD SERIAL NO

40

Parameter Configuration 4112

If BACnet or Modbus communication is ordered the associated settings will need to be

configured with the exception of Modbus communication with WattMaster Controls which has

been configured at the factory To set the parameters refer to the following procedure below

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 41121

through 41124 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

41121 MAC Address (BACnet Communication Option)

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network Each AAON Airflow Signal

Processor must have a unique MAC Address assigned ranging from 2 to 127

Tech Config

Password 1000

4PT Flow Corr MAC Address

MAC Address (Range = 02 to 254)

Instance Number

Modbus ID (002)

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 20: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

20

Table 6 - Engineering Units

Standard

Flow

Units

Actual

Flow

Units

SCFM ACFM

SCFH LS

SLS Am3S

Sm3S Am3M

Sm3M Am3HR

Sm3HR

Lockdown 484

Due to the high square root gain associated with very low delta p values the display and process

output are locked to a zero value until the input value reaches the specified Lockdown Value that

was entered Above the Lockdown Value the output is linear to air flow

4841 Lockdown Value

The Lockdown Value can be changed from 0 to 20 of Operating Range Value Lockdown

Values can be changed in 1 increments The recommended standard is 5

Field Setup

Menu

Operating Range Lockdown (0-20)

Zero Calibration (5)

Engineering Units Delay (0-20 sec)

Lockdown (2) Sec

4842 Lockdown Delay

The Lockdown Delay Menu allows the user to enter a lockdown time delay (0-20 seconds) that

will delay the display and output lockdown from occurring until the flow value or output value

has remained below the lockdown value for that duration

Field Setup

Menu

Operating Range Lockdown (0-20)

Zero Calibration (5)

Engineering Units Delay (0-20 sec)

Lockdown (2) Sec

21

Flow Correction 485

The Flow Correction Menu was incorporated into the AAON Airflow Signal Processor to give

the user an easy way to make corrections to the display and output without changing the

Operating Range Value entered by the factory or user The Flow Correction Menu would be

used to correct for a constant error from zero to the entered Operating Range Value

4851 Flow Correction (K-Factor)

If the user knows the change required to match the balancers reading select the K-Factor

Menu and enter this value for the K-Factor The minimum and maximum allowable K-Factor

Value is displayed in the K-Factor Menu

Field Setup

Menu

Flow Correction Flow Correction

AutoZero K-Factor K-Factor Range

Temp Comp (085 13)

Display Filter K-Factor Calc K=(01000)

4852 Flow Correction (K-Factor Calculator)

If the new K-factor Value needs to be calculated select the K-Factor Calc Menu Enter the

Displayed Value on the AAON Airflow Signal Processor and actual Measured Value press

Enter and the change will be calculated and stored as the new K-Factor Value

Field Setup

Menu

Flow Correction Displayed Value

AutoZero K-Factor (000000)

Temp Comp Measured Value

Display Filter K-Factor Calc (000000)

-FLOW CORRECTION EXAMPLE-

The balancer is consistently measuring a value of 9500 CFM which is 500 CFM less than the

10000 CFM value on the AAON Airflow Signal Processor display The user would then

perform the following math function Measured Value Displayed Value = K-Factor so 9500

CFM 10000 CFM = 0950 The user would enter 0950 for the K-Factor Flow Correction If

the K-Factor Calculator is used the K- Factor Flow Correction would automatically update the K

Factor

AutoZero 486

The AutoZero feature corrects any zero offset caused by large ambient temperature changes

22

4861 AutoZero Status

The AutoZero Status Menu allows the user to turn the AutoZero function ON or OFF

Field Setup

Menu

Flow Correction AZ Status AZ Status

AutoZero AZ Interval (ONOFF)

Temp Comp AZ Test Interval

Display Filter (ON)

4862 AutoZero Interval

The AutoZero Interval Menu allows the user to select the AutoZero Interval from once an hour

to once a day in 1 hour increments Use the UPDOWN keys to select the interval value Upon

device power up an AutoZero cycle will occur after 20 seconds

Field Setup

Menu

Flow Correction AZ Status AZ Interval

AutoZero AZ Interval (1 TO 24HR)

Temp Comp AZ Test Interval

Display Filter (01)HR

4863 AutoZero Test Interval

For troubleshooting or testing the AutoZero function the AutoZero Test Interval Menu allows

the user to select an Auto Zero test frequency of once a minute to once every 30 minutes in 1

minute increments Use the UPDOWN keys to select the interval value If AutoZero Test

Interval is turned ON for more than 60 minutes it will automatically default to OFF and the

AutoZero Interval (see Section 4862) will be reactivated

Field Setup

Menu

Flow Correction AZ Status AZ Test Interval

AutoZero AZ Interval (OFF)

Temp Comp AZ Test Interval Interval

Display Filter (1)Min

Temperature Compensation 487

The Temperature Compensation option compensates the flow and velocity signal for density

changes caused by variations in the process air temperature An input signal from AAON

Temperature Transmitter is required see Section 33 for proper temperature transmitter

connection and Section 452 for temperature input signal configuration

23

4871 Temperature Units

The Temperature Units Menu allows the user to select the appropriate temperature units for the

job The default setting is ordmF

Field Setup

Menu

Flow Correction Temperature Units Units

AutoZero Temperature Values (ordmF ordmC)

Temp Comp Temperature Input

Display Filter Fixed Value (ordmF)

4872 Temperature Values

The Temperature Values Menu allows the factory or user to set the minimum and maximum

temperature range values that represent the input signal from the external temperature transmitter

or the building automation system Since the AAON Temperature Transmitter has been supplied

the minimum and maximum temperature range values of -30degF to 130degF have been

preprogramed

Field Setup

Menu

Flow Correction Temperature Units Minimum Value

AutoZero Temperature Values (-030)

Temp Comp Temperature Input Maximum Value

Display Filter Fixed Value (130)

If the temperature values are changed from the factory settings and the new temperature values

cause the existing Operating Range Value to be outside the new calculated Minimum or

Maximum Full Scale Value the below Warning Message will appear and the Operating Range

will be reset to the new Maximum Full Scale Value by pressing Enter The display will

automatically jump to the Operating Range Menu allowing the user to enter a new Operating

Range Value This can be accomplished by performing the steps under Section 481 See

Temperature Range Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

24

Minimum Value

(-000)

Maximum Value

(000)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Min amp

Max Temperature

value and pressing the

Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Temperature Range Example-

Minimum Value

(-000)

Accepted

(100)

4873 Temperature Input

The Temperature Input Menu allows the user to select between three temperature input options

(Fixed Variable and Network) for the flow calculations Since the AAON Temperature

Transmitter has been supplied Variable has been selected If Fixed is selected the default

temperature value entered in the Fixed Value Menu (see Section 4874) is used If Net is

selected the temperature input signal is obtained through network communications The Net

option is only available if one of the communication options is ordered The temperature value

is only displayed on the LCD screen if the Temperature Input is set to Variable or Network

Field Setup

Menu

Flow Correction Temperature Units Temp Input

AutoZero Temperature Values (FixVarNet)

Temp Comp Temperature Input

Display Filter Fixed Value (Variable)

25

4874 Fixed Value

The Fixed Value Menu allows the user to enter a temperature value for the flow calculations

This value will not be displayed on the LCD screen

Field Setup

Menu

Flow Correction Temperature Units Fixed Value

AutoZero Temperature Values (˚F)

Temp Comp Temperature Input

Display Filter Fixed Value (+068)

Display Filter 488

The Display Filter Menu allows the user to adjust the Display Filter rolling average algorithm by

setting the Sample Interval Time value in seconds and the number of rolling average Sample

Counts The adjustment range of the Sample Interval Time is 010 to 655 seconds in 010

increments The Sample Count range is 0 to 150 Sample Counts The Display Filter is

independent of the Process Output Filter Value (See Section 489)

Field Setup

Menu

Flow Correction Sample Interval Time

AutoZero (005)sec

Temp Comp (0-150) Sample Count

Display Filter (010)

Process Output Filter 489

The Process Output Filter Menu allows the user to adjust the Process Output Filters rolling

average algorithm by setting the Sample Interval Time value in seconds and the number of

rolling average Sample Counts The adjustment range of the Sample Interval Time is 010 to

655 seconds in 010 increments The Sample Count range is 0 to 150 Sample Counts The

Process Output Filter is independent of the Display Filter Value (See Section 488)

Field Setup

Menu

Output Filter Sample Interval Time

Alarm Options (005)sec

Factory Defaults (0-150) Sample Count

(010)

26

HighLow Alarm Option 4810

The following menus for configuration of HighLow Alarms are only available if the HighLow

Alarm option is purchased

48101 Alarm Status

The Alarm Status allows the user to independently turn each alarm ON or OFF

Field Setup

Menu

Output Filter Alarm Status Low Alarm

Alarm Options Alarm Value (On)

Factory Defaults Alarm Delay High Alarm

(On)

48102 Alarm Values

The Alarm Value Menu allows the user to enter the Low or the High flow alarm value Alarm

values will be displayed in the same engineering units selected in the Eng Units Menu (see

Section 483)

- High Alarm Function The High Alarm activates if the flow exceeds the High Alarm

value and resets when the flow drops below the High Alarm Value

- Low Alarm Function The Low Alarm activates if the flow drops below the Low

Alarm Value and resets when the flow exceeds the Low Alarm Value

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Value

Alarm Options Alarm Value (000000)

Factory Defaults Alarm Delay Hi Alarm Value

(100000)

48103 Alarm Delay

The Alarm Delay Menu allows the user to enter an alarm delay of 0 to 999 seconds before an

alarm will be activated The alarm will be reset without a delay

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Delay

Alarm Options Alarm Value (000)Seconds

Factory Defaults Alarm Delay Hi Alarm Delay

(000)Seconds

27

Factory Defaults 4811

If parameter configuration changes have been made incorrectly to the AAON Airflow Signal

Processor all device settings can be restored to the original AAON factory settings by selecting

YES and pressing Enter in both the Set To Factory Defaults Menu and the Verify Set To Factory

Defaults Menu (see Table 7 below for a list of Saved Settings)

Field Setup

Menu

Output Filter Set To Verify Set To

Alarm Options Factory Defaults Factory Defaults

Factory Defaults

(No) (No)

Table 7 - Factory Defaults

Item Saved Setting Item Saved Setting

1 All Factory Calibration Points (12) 14 MAC Address

2 Area Factor 15 Instance Number

3 Operating Range 16 Engineering Units

4 4 Pt Flow Correction 17 Display Filter Values

5 Altitude 18 Output Filter

6 K-Factor 19 DP Display Format

7 Lockdown amp Delay Values 20 Output Calibration

8 Flow Correction 21 AutoZero Status

9 Flow Coefficient 22 AutoZero Interval

10 Min amp Max Temp Range Values 23 Temp Units

11 Alarm Status 24 Temp Input

12 Alarm Values 25 Temp Fixed Value

13 Alarm Delay 26 Baud Rate

28

49 TECH CONFIGURATION MENUS

To set parameters under the Tech Configuration Menu refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 491

through 4911 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

Area Factor 491

To convert the differential pressure signal from the AAON Airflow Station to a flow value the

Area Factor associated with the AAON Airflow Station has been preprogramed by the factory

If the Area Factor needs to be checked or reconfigured the correct Area Factor for the AAON

Airflow Station can be found on the AAON Airflow Station product label installed in the air

handling unit

Tech Config

Password 1000

Area Factor Area Factor

Min Calibration (FT2)

Span Calibration

Altitude (001000)

29

If the Area Factor is reconfigured and the new Area Factor causes the existing Operating Range

Value to be outside the new calculated Minimum or Maximum Full Scale Value the below

Warning Message will appear and the Operating Range will be reset to the new Maximum Full

Scale Value by pressing Enter The display will automatically jump to the Operating Range

Menu allowing the user to enter a new Operating Range Value This can be accomplished by

performing the steps under Section 481 See Area Factor Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Area Factor

(FT )

(001000)

Area Factor

(FT )

Accepted

(001200)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Area

Factor and pressing

the Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Area Factor Example-

2

2

30

Minimum Calibration 492

The Minimum Calibration Menu allows a user to perform a minimum transducer calibration

This value will be placed in a different memory location and used until a Return to Factory

Defaults is selected (see Section 4811)

(Caution Before performing a minimum calibration disconnect the Total (High) and Static

(Low) Pressure connections perform a minimum calibration and then reconnect the Total

and Static Pressure connections)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00000) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Span Calibration 493

The Span Calibration Menu allows the user to perform a span transducer calibration to eliminate

any possible transducer drift This value will be placed in a different memory location than the

Factory Span memory location and used until a Return to Factory Defaults is selected (see

Section 4811)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00570) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Altitude 494

The Altitude Menu allows the user to enter the specific altitude for the job for the density

calculations the job specific site Altitude has been preprogramed by the factory

Tech Config

Password 1000

Area Factor Altitude

Min Calibration

Span Calibration (0000)Ft

Altitude

31

If the Altitude is changed from the factory setting and the new Altitude causes the existing

Operating Range Value to be outside the new calculated Minimum or Maximum Full Scale

Value the below Warning Message will appear and the Operating Range will be reset to the new

Maximum Full Scale Value by pressing Enter The display will automatically jump to the

Operating Range Menu allowing the user to enter a new Operating Range Value This can be

accomplished by performing the steps under Section 481 See Altitude Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Altitude

(0000)Ft

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Altitude

and pressing the Enter

button will calculate

new Min amp Max Op

Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Altitude Example-

Altitude

Accepted

(0100)Ft

32

Process Output Calibration 495

4951 Minimum Calibration

The Minimum Calibration Menu allows the user to make output zero adjustments Monitor the

output and with each Up or Down key depression the output will increase or decrease by

001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

4952 Span Calibration

The Span Calibration Menu allows the user to make output span adjustments Span adjustments

require a low pressure air source adjusted to the Full Scale Value shown on the side label

Monitor the output and with each Up or Down button depression the output will increase or

decrease by 001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

Probe Coefficient 496

The Probe Correction Coefficient Menu allows the user to modify the formula constant of

109670 used for non-amplified Pitot-type flow sensors

Tech Config

Password 1000

Output Calibration Correction Coeff

Correction Coeff Probe

4PT Flow Corr (109670)

MAC Address (00109670)

33

Four Point Flow Correction 497

The Four Point Flow Correction Menu allows the user to make corrections to the display and

output signal at 20 increments between 20 and 80 of the Operating Range Value entered

The Displayed Value is a fixed value determined by the percentage of Operating Range The

Measured Value is the value determined by an independent balancerrsquos reading

Tech Config

Password 1000

Output Calibration 80000 CFM Displayed Value

Correction Coeff 60000 CFM 80000

4PT Flow Corr 40000 CFM Measured Value

MAC Address 20000 CFM 79500

80000 CFM Displayed Value

60000 CFM 60000

40000 CFM Measured Value

20000 CFM 60500

80000 CFM Displayed Value

60000 CFM 40000

40000 CFM Measured Value

20000 CFM 40100

80000 CFM Displayed Value

60000 CFM 20000

40000 CFM Measured Value

20000 CFM 19500

MAC Address (BACnet Communication Option) 498

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network The default is 002 For

additional information refer to Section 411

Tech Config

Password 1000

Output Calibration MAC Address

Correction Coeff (Range = 02 to 254)

4PT Flow Corr

MAC Address (002)

34

Instance Number (BACnet Communication Option) 499

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The default is 1002 For

additional information refer to Section 411

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (Default = 1002)

Instance Number

Modbus ID (01002)

Modbus ID (Modbus Communication Option) 4910

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network The default is 002 For

communication with WattMaster Controls the Modbus ID has been set by the factory to 009 for

outside airflow applications For additional information refer to the Section 411

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

Baud Rate (BACnet amp Modbus Communication Options) 4911

The Baud Rate Menu allows the user to set a unique network baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate Modbus communications supports

96 192 384 576 and 1152 Kbps baud rate The default is 384 Kbps For communication

with WattMaster Controls the Baud Rate has been set by the factory to 96 Kbps For additional

information refer to Section 411

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

35

410 WARNING MESSAGES

Input Pressure Overrange Message 4101

If the input pressure exceeds the entered Operating Range Value the following message will

appear on the display It will alternate between the process display and the error message until

the input falls below the Operating Range Value

- Caution -

Input Beyond

Operating Range

Selected

Transducer Calibration Message 4102

If during a transducer zero or span calibration process the transducer output pressure value

measured exceeds plusmn20 of the expected value the following message will appear on the display

Once the Enter button is pressed the display returns to the previous calibration menu

Value entered is

Outside Factory

set limits

(Press Enter)

Operating Range Message 4103

If the new values entered for Temperature Compensation Area Factor or Altitude (see Sections

487 491 and 494) causes the Operating Range Value to exceed the new calculated

Maximum Full Scale Value the following message will appear on the display

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

New Operating Range Message 4104

If a user enters a new Operating Range Value the following message will appear on the display

notifying the user that if any 4 PT Flow Correction Values (see Section 497) were previously

entered they will be reset The message allows the user to confirm that the Operating Range

change should be made To complete the Operating Range change the user must use the

UPDown buttons to change the NO to a YES and press the ENTER button

Value will

Reset 4PT

Flow Correction

Values

Make the Change

(NO)

(Press Enter)

36

411 NETWORK COMMUNICATION

The AAON Airflow Signal Processor can be ordered with BACnet Modbus or LonWorks

Communication For BACnet Communication the AAON Airflow Signal Processors utilize

MSTP (Master SlaveToken Passing) BACnet type protocol BACnet is implemented using

EIA-485 signaling standards through a shielded twisted pair wire operating at a baud rate of 96

Kbps to 768 Kbps Each device has a unique MAC Address ranging from 2 to 127 Refer to

Section 4113 for BACnet Protocol Implementation Conformance Statements (PICS) For

Modbus Communication the AAON Airflow Signal Processors utilize the Modbus ndash RTU Slave

protocol using EIA-485 signaling standards through a shielded twisted pair wire operating at a

baud rate of 96 Kbps to 1152 Kbps Each device has a unique Modbus ID ranging from 1 to

254 Refer to Section 4114 for Modbus software configuration parameters For LonWorks

Communication each AAON Airflow Signal Processor has a unique Neuron Chip ID which is

loaded on the network by pressing a service switch located on the main board (see Section

4111 Figure 7) The LonWorks network utilizes a shielded twisted pair wire operating at a

fixed baud rate of 78 Kbps Refer to Section 4115 for LonWorks network variables

Sections 4111 and 4112 contain procedures for electrical connection of the AAON Airflow

Signal Processor to the network and for configuring the required communication parameters

Electrical Connection 4111

The following procedure outlines the steps for installing the interface wiring for network

communication Network wire should be low capacitance shielded 22 or 24 AWG twisted pair

with PVC jacket such as Belden Part numbers 9841 3105A or equivalent

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Verify that the Power Switch (S3) is in the OFF position and install the interface

wiring for Pins 9 and 10 as shown in Figure 7 If multiple AAON Airflow Signal

Processors will be connected to the same network see Figure 8 for connecting

multiple devices For network systems that require all devices to have a common

signal ground refer to Figure 9 for electrical connection The J2 electrical

connector has a removable terminal block for ease of installing the interface

wiring

Step 4 For proper operation of BACnet and Modbus communication networks the

device that is electrically installed at the end of the network may require the

Terminator Switch be moved to the ON position to prevent line and data

reflection If Terminator is required it must be applied to both physical ends of

the network All other devices should have the Terminator Switch in the OFF

position The communication board is located on the back side of the main

AAON Airflow Signal Processor board See Figure 10 below for Terminator

Switch location on the communication board

Step 5 For LonWorks Communication refer to Figure 7 for the location of the Lon

Service Pin

37

Step 6 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 7 Configure the required parameters as outlined in Section 4112

Step 8 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

RP1

S3

NETWORK

COMMUNICATION+

-

LON

SERVICE PIN

Figure 7 - Network Communication Electrical Connection

38

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

AAON AIRFLOW

SIGNAL PROCESSOR

CONNECT ONLY ONE END OF SHIELD

WIRE TO EARTH GROUND AS SHOWN

SET TERMINATOR SWITCH

ON IF REQUIRED

NETWORK

COMMUNICATIONS

NETWORK

CONNECT SHIELD

WIRES TOGETHER

CONNECT SHIELD

WIRES TOGETHER

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not

Requiring Common Signal Grounds

Note If using two conductor communication wire use the shield wire to connect all device signal grounds together as shown in the figure below If using three conductor communication wire use the 3rd conductor to connect all device signal grounds together and connect one side of the shield to earth ground

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

SIGNAL

GROUND

8

J2

SIGNAL

GROUND

8

J28

J2

USE SHIELD WIRE OR 3RD CONDUCTOR TO

CONNECT DEVICE SIGNAL GROUND TO

NETWORK SIGNAL GROUND

SET TERMINATOR SWITCH

ON IF REQUIRED

AAON AIRFLOW

SIGNAL PROCESSOR

NETWORK

COMMUNICATIONS

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

SIGNAL

GROUND

SIGNAL

GROUND

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds

39

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location

COMMUNICATION BOARD ID

BOARD SERIAL NO

40

Parameter Configuration 4112

If BACnet or Modbus communication is ordered the associated settings will need to be

configured with the exception of Modbus communication with WattMaster Controls which has

been configured at the factory To set the parameters refer to the following procedure below

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 41121

through 41124 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

41121 MAC Address (BACnet Communication Option)

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network Each AAON Airflow Signal

Processor must have a unique MAC Address assigned ranging from 2 to 127

Tech Config

Password 1000

4PT Flow Corr MAC Address

MAC Address (Range = 02 to 254)

Instance Number

Modbus ID (002)

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 21: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

21

Flow Correction 485

The Flow Correction Menu was incorporated into the AAON Airflow Signal Processor to give

the user an easy way to make corrections to the display and output without changing the

Operating Range Value entered by the factory or user The Flow Correction Menu would be

used to correct for a constant error from zero to the entered Operating Range Value

4851 Flow Correction (K-Factor)

If the user knows the change required to match the balancers reading select the K-Factor

Menu and enter this value for the K-Factor The minimum and maximum allowable K-Factor

Value is displayed in the K-Factor Menu

Field Setup

Menu

Flow Correction Flow Correction

AutoZero K-Factor K-Factor Range

Temp Comp (085 13)

Display Filter K-Factor Calc K=(01000)

4852 Flow Correction (K-Factor Calculator)

If the new K-factor Value needs to be calculated select the K-Factor Calc Menu Enter the

Displayed Value on the AAON Airflow Signal Processor and actual Measured Value press

Enter and the change will be calculated and stored as the new K-Factor Value

Field Setup

Menu

Flow Correction Displayed Value

AutoZero K-Factor (000000)

Temp Comp Measured Value

Display Filter K-Factor Calc (000000)

-FLOW CORRECTION EXAMPLE-

The balancer is consistently measuring a value of 9500 CFM which is 500 CFM less than the

10000 CFM value on the AAON Airflow Signal Processor display The user would then

perform the following math function Measured Value Displayed Value = K-Factor so 9500

CFM 10000 CFM = 0950 The user would enter 0950 for the K-Factor Flow Correction If

the K-Factor Calculator is used the K- Factor Flow Correction would automatically update the K

Factor

AutoZero 486

The AutoZero feature corrects any zero offset caused by large ambient temperature changes

22

4861 AutoZero Status

The AutoZero Status Menu allows the user to turn the AutoZero function ON or OFF

Field Setup

Menu

Flow Correction AZ Status AZ Status

AutoZero AZ Interval (ONOFF)

Temp Comp AZ Test Interval

Display Filter (ON)

4862 AutoZero Interval

The AutoZero Interval Menu allows the user to select the AutoZero Interval from once an hour

to once a day in 1 hour increments Use the UPDOWN keys to select the interval value Upon

device power up an AutoZero cycle will occur after 20 seconds

Field Setup

Menu

Flow Correction AZ Status AZ Interval

AutoZero AZ Interval (1 TO 24HR)

Temp Comp AZ Test Interval

Display Filter (01)HR

4863 AutoZero Test Interval

For troubleshooting or testing the AutoZero function the AutoZero Test Interval Menu allows

the user to select an Auto Zero test frequency of once a minute to once every 30 minutes in 1

minute increments Use the UPDOWN keys to select the interval value If AutoZero Test

Interval is turned ON for more than 60 minutes it will automatically default to OFF and the

AutoZero Interval (see Section 4862) will be reactivated

Field Setup

Menu

Flow Correction AZ Status AZ Test Interval

AutoZero AZ Interval (OFF)

Temp Comp AZ Test Interval Interval

Display Filter (1)Min

Temperature Compensation 487

The Temperature Compensation option compensates the flow and velocity signal for density

changes caused by variations in the process air temperature An input signal from AAON

Temperature Transmitter is required see Section 33 for proper temperature transmitter

connection and Section 452 for temperature input signal configuration

23

4871 Temperature Units

The Temperature Units Menu allows the user to select the appropriate temperature units for the

job The default setting is ordmF

Field Setup

Menu

Flow Correction Temperature Units Units

AutoZero Temperature Values (ordmF ordmC)

Temp Comp Temperature Input

Display Filter Fixed Value (ordmF)

4872 Temperature Values

The Temperature Values Menu allows the factory or user to set the minimum and maximum

temperature range values that represent the input signal from the external temperature transmitter

or the building automation system Since the AAON Temperature Transmitter has been supplied

the minimum and maximum temperature range values of -30degF to 130degF have been

preprogramed

Field Setup

Menu

Flow Correction Temperature Units Minimum Value

AutoZero Temperature Values (-030)

Temp Comp Temperature Input Maximum Value

Display Filter Fixed Value (130)

If the temperature values are changed from the factory settings and the new temperature values

cause the existing Operating Range Value to be outside the new calculated Minimum or

Maximum Full Scale Value the below Warning Message will appear and the Operating Range

will be reset to the new Maximum Full Scale Value by pressing Enter The display will

automatically jump to the Operating Range Menu allowing the user to enter a new Operating

Range Value This can be accomplished by performing the steps under Section 481 See

Temperature Range Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

24

Minimum Value

(-000)

Maximum Value

(000)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Min amp

Max Temperature

value and pressing the

Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Temperature Range Example-

Minimum Value

(-000)

Accepted

(100)

4873 Temperature Input

The Temperature Input Menu allows the user to select between three temperature input options

(Fixed Variable and Network) for the flow calculations Since the AAON Temperature

Transmitter has been supplied Variable has been selected If Fixed is selected the default

temperature value entered in the Fixed Value Menu (see Section 4874) is used If Net is

selected the temperature input signal is obtained through network communications The Net

option is only available if one of the communication options is ordered The temperature value

is only displayed on the LCD screen if the Temperature Input is set to Variable or Network

Field Setup

Menu

Flow Correction Temperature Units Temp Input

AutoZero Temperature Values (FixVarNet)

Temp Comp Temperature Input

Display Filter Fixed Value (Variable)

25

4874 Fixed Value

The Fixed Value Menu allows the user to enter a temperature value for the flow calculations

This value will not be displayed on the LCD screen

Field Setup

Menu

Flow Correction Temperature Units Fixed Value

AutoZero Temperature Values (˚F)

Temp Comp Temperature Input

Display Filter Fixed Value (+068)

Display Filter 488

The Display Filter Menu allows the user to adjust the Display Filter rolling average algorithm by

setting the Sample Interval Time value in seconds and the number of rolling average Sample

Counts The adjustment range of the Sample Interval Time is 010 to 655 seconds in 010

increments The Sample Count range is 0 to 150 Sample Counts The Display Filter is

independent of the Process Output Filter Value (See Section 489)

Field Setup

Menu

Flow Correction Sample Interval Time

AutoZero (005)sec

Temp Comp (0-150) Sample Count

Display Filter (010)

Process Output Filter 489

The Process Output Filter Menu allows the user to adjust the Process Output Filters rolling

average algorithm by setting the Sample Interval Time value in seconds and the number of

rolling average Sample Counts The adjustment range of the Sample Interval Time is 010 to

655 seconds in 010 increments The Sample Count range is 0 to 150 Sample Counts The

Process Output Filter is independent of the Display Filter Value (See Section 488)

Field Setup

Menu

Output Filter Sample Interval Time

Alarm Options (005)sec

Factory Defaults (0-150) Sample Count

(010)

26

HighLow Alarm Option 4810

The following menus for configuration of HighLow Alarms are only available if the HighLow

Alarm option is purchased

48101 Alarm Status

The Alarm Status allows the user to independently turn each alarm ON or OFF

Field Setup

Menu

Output Filter Alarm Status Low Alarm

Alarm Options Alarm Value (On)

Factory Defaults Alarm Delay High Alarm

(On)

48102 Alarm Values

The Alarm Value Menu allows the user to enter the Low or the High flow alarm value Alarm

values will be displayed in the same engineering units selected in the Eng Units Menu (see

Section 483)

- High Alarm Function The High Alarm activates if the flow exceeds the High Alarm

value and resets when the flow drops below the High Alarm Value

- Low Alarm Function The Low Alarm activates if the flow drops below the Low

Alarm Value and resets when the flow exceeds the Low Alarm Value

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Value

Alarm Options Alarm Value (000000)

Factory Defaults Alarm Delay Hi Alarm Value

(100000)

48103 Alarm Delay

The Alarm Delay Menu allows the user to enter an alarm delay of 0 to 999 seconds before an

alarm will be activated The alarm will be reset without a delay

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Delay

Alarm Options Alarm Value (000)Seconds

Factory Defaults Alarm Delay Hi Alarm Delay

(000)Seconds

27

Factory Defaults 4811

If parameter configuration changes have been made incorrectly to the AAON Airflow Signal

Processor all device settings can be restored to the original AAON factory settings by selecting

YES and pressing Enter in both the Set To Factory Defaults Menu and the Verify Set To Factory

Defaults Menu (see Table 7 below for a list of Saved Settings)

Field Setup

Menu

Output Filter Set To Verify Set To

Alarm Options Factory Defaults Factory Defaults

Factory Defaults

(No) (No)

Table 7 - Factory Defaults

Item Saved Setting Item Saved Setting

1 All Factory Calibration Points (12) 14 MAC Address

2 Area Factor 15 Instance Number

3 Operating Range 16 Engineering Units

4 4 Pt Flow Correction 17 Display Filter Values

5 Altitude 18 Output Filter

6 K-Factor 19 DP Display Format

7 Lockdown amp Delay Values 20 Output Calibration

8 Flow Correction 21 AutoZero Status

9 Flow Coefficient 22 AutoZero Interval

10 Min amp Max Temp Range Values 23 Temp Units

11 Alarm Status 24 Temp Input

12 Alarm Values 25 Temp Fixed Value

13 Alarm Delay 26 Baud Rate

28

49 TECH CONFIGURATION MENUS

To set parameters under the Tech Configuration Menu refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 491

through 4911 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

Area Factor 491

To convert the differential pressure signal from the AAON Airflow Station to a flow value the

Area Factor associated with the AAON Airflow Station has been preprogramed by the factory

If the Area Factor needs to be checked or reconfigured the correct Area Factor for the AAON

Airflow Station can be found on the AAON Airflow Station product label installed in the air

handling unit

Tech Config

Password 1000

Area Factor Area Factor

Min Calibration (FT2)

Span Calibration

Altitude (001000)

29

If the Area Factor is reconfigured and the new Area Factor causes the existing Operating Range

Value to be outside the new calculated Minimum or Maximum Full Scale Value the below

Warning Message will appear and the Operating Range will be reset to the new Maximum Full

Scale Value by pressing Enter The display will automatically jump to the Operating Range

Menu allowing the user to enter a new Operating Range Value This can be accomplished by

performing the steps under Section 481 See Area Factor Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Area Factor

(FT )

(001000)

Area Factor

(FT )

Accepted

(001200)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Area

Factor and pressing

the Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Area Factor Example-

2

2

30

Minimum Calibration 492

The Minimum Calibration Menu allows a user to perform a minimum transducer calibration

This value will be placed in a different memory location and used until a Return to Factory

Defaults is selected (see Section 4811)

(Caution Before performing a minimum calibration disconnect the Total (High) and Static

(Low) Pressure connections perform a minimum calibration and then reconnect the Total

and Static Pressure connections)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00000) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Span Calibration 493

The Span Calibration Menu allows the user to perform a span transducer calibration to eliminate

any possible transducer drift This value will be placed in a different memory location than the

Factory Span memory location and used until a Return to Factory Defaults is selected (see

Section 4811)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00570) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Altitude 494

The Altitude Menu allows the user to enter the specific altitude for the job for the density

calculations the job specific site Altitude has been preprogramed by the factory

Tech Config

Password 1000

Area Factor Altitude

Min Calibration

Span Calibration (0000)Ft

Altitude

31

If the Altitude is changed from the factory setting and the new Altitude causes the existing

Operating Range Value to be outside the new calculated Minimum or Maximum Full Scale

Value the below Warning Message will appear and the Operating Range will be reset to the new

Maximum Full Scale Value by pressing Enter The display will automatically jump to the

Operating Range Menu allowing the user to enter a new Operating Range Value This can be

accomplished by performing the steps under Section 481 See Altitude Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Altitude

(0000)Ft

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Altitude

and pressing the Enter

button will calculate

new Min amp Max Op

Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Altitude Example-

Altitude

Accepted

(0100)Ft

32

Process Output Calibration 495

4951 Minimum Calibration

The Minimum Calibration Menu allows the user to make output zero adjustments Monitor the

output and with each Up or Down key depression the output will increase or decrease by

001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

4952 Span Calibration

The Span Calibration Menu allows the user to make output span adjustments Span adjustments

require a low pressure air source adjusted to the Full Scale Value shown on the side label

Monitor the output and with each Up or Down button depression the output will increase or

decrease by 001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

Probe Coefficient 496

The Probe Correction Coefficient Menu allows the user to modify the formula constant of

109670 used for non-amplified Pitot-type flow sensors

Tech Config

Password 1000

Output Calibration Correction Coeff

Correction Coeff Probe

4PT Flow Corr (109670)

MAC Address (00109670)

33

Four Point Flow Correction 497

The Four Point Flow Correction Menu allows the user to make corrections to the display and

output signal at 20 increments between 20 and 80 of the Operating Range Value entered

The Displayed Value is a fixed value determined by the percentage of Operating Range The

Measured Value is the value determined by an independent balancerrsquos reading

Tech Config

Password 1000

Output Calibration 80000 CFM Displayed Value

Correction Coeff 60000 CFM 80000

4PT Flow Corr 40000 CFM Measured Value

MAC Address 20000 CFM 79500

80000 CFM Displayed Value

60000 CFM 60000

40000 CFM Measured Value

20000 CFM 60500

80000 CFM Displayed Value

60000 CFM 40000

40000 CFM Measured Value

20000 CFM 40100

80000 CFM Displayed Value

60000 CFM 20000

40000 CFM Measured Value

20000 CFM 19500

MAC Address (BACnet Communication Option) 498

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network The default is 002 For

additional information refer to Section 411

Tech Config

Password 1000

Output Calibration MAC Address

Correction Coeff (Range = 02 to 254)

4PT Flow Corr

MAC Address (002)

34

Instance Number (BACnet Communication Option) 499

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The default is 1002 For

additional information refer to Section 411

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (Default = 1002)

Instance Number

Modbus ID (01002)

Modbus ID (Modbus Communication Option) 4910

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network The default is 002 For

communication with WattMaster Controls the Modbus ID has been set by the factory to 009 for

outside airflow applications For additional information refer to the Section 411

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

Baud Rate (BACnet amp Modbus Communication Options) 4911

The Baud Rate Menu allows the user to set a unique network baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate Modbus communications supports

96 192 384 576 and 1152 Kbps baud rate The default is 384 Kbps For communication

with WattMaster Controls the Baud Rate has been set by the factory to 96 Kbps For additional

information refer to Section 411

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

35

410 WARNING MESSAGES

Input Pressure Overrange Message 4101

If the input pressure exceeds the entered Operating Range Value the following message will

appear on the display It will alternate between the process display and the error message until

the input falls below the Operating Range Value

- Caution -

Input Beyond

Operating Range

Selected

Transducer Calibration Message 4102

If during a transducer zero or span calibration process the transducer output pressure value

measured exceeds plusmn20 of the expected value the following message will appear on the display

Once the Enter button is pressed the display returns to the previous calibration menu

Value entered is

Outside Factory

set limits

(Press Enter)

Operating Range Message 4103

If the new values entered for Temperature Compensation Area Factor or Altitude (see Sections

487 491 and 494) causes the Operating Range Value to exceed the new calculated

Maximum Full Scale Value the following message will appear on the display

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

New Operating Range Message 4104

If a user enters a new Operating Range Value the following message will appear on the display

notifying the user that if any 4 PT Flow Correction Values (see Section 497) were previously

entered they will be reset The message allows the user to confirm that the Operating Range

change should be made To complete the Operating Range change the user must use the

UPDown buttons to change the NO to a YES and press the ENTER button

Value will

Reset 4PT

Flow Correction

Values

Make the Change

(NO)

(Press Enter)

36

411 NETWORK COMMUNICATION

The AAON Airflow Signal Processor can be ordered with BACnet Modbus or LonWorks

Communication For BACnet Communication the AAON Airflow Signal Processors utilize

MSTP (Master SlaveToken Passing) BACnet type protocol BACnet is implemented using

EIA-485 signaling standards through a shielded twisted pair wire operating at a baud rate of 96

Kbps to 768 Kbps Each device has a unique MAC Address ranging from 2 to 127 Refer to

Section 4113 for BACnet Protocol Implementation Conformance Statements (PICS) For

Modbus Communication the AAON Airflow Signal Processors utilize the Modbus ndash RTU Slave

protocol using EIA-485 signaling standards through a shielded twisted pair wire operating at a

baud rate of 96 Kbps to 1152 Kbps Each device has a unique Modbus ID ranging from 1 to

254 Refer to Section 4114 for Modbus software configuration parameters For LonWorks

Communication each AAON Airflow Signal Processor has a unique Neuron Chip ID which is

loaded on the network by pressing a service switch located on the main board (see Section

4111 Figure 7) The LonWorks network utilizes a shielded twisted pair wire operating at a

fixed baud rate of 78 Kbps Refer to Section 4115 for LonWorks network variables

Sections 4111 and 4112 contain procedures for electrical connection of the AAON Airflow

Signal Processor to the network and for configuring the required communication parameters

Electrical Connection 4111

The following procedure outlines the steps for installing the interface wiring for network

communication Network wire should be low capacitance shielded 22 or 24 AWG twisted pair

with PVC jacket such as Belden Part numbers 9841 3105A or equivalent

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Verify that the Power Switch (S3) is in the OFF position and install the interface

wiring for Pins 9 and 10 as shown in Figure 7 If multiple AAON Airflow Signal

Processors will be connected to the same network see Figure 8 for connecting

multiple devices For network systems that require all devices to have a common

signal ground refer to Figure 9 for electrical connection The J2 electrical

connector has a removable terminal block for ease of installing the interface

wiring

Step 4 For proper operation of BACnet and Modbus communication networks the

device that is electrically installed at the end of the network may require the

Terminator Switch be moved to the ON position to prevent line and data

reflection If Terminator is required it must be applied to both physical ends of

the network All other devices should have the Terminator Switch in the OFF

position The communication board is located on the back side of the main

AAON Airflow Signal Processor board See Figure 10 below for Terminator

Switch location on the communication board

Step 5 For LonWorks Communication refer to Figure 7 for the location of the Lon

Service Pin

37

Step 6 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 7 Configure the required parameters as outlined in Section 4112

Step 8 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

RP1

S3

NETWORK

COMMUNICATION+

-

LON

SERVICE PIN

Figure 7 - Network Communication Electrical Connection

38

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

AAON AIRFLOW

SIGNAL PROCESSOR

CONNECT ONLY ONE END OF SHIELD

WIRE TO EARTH GROUND AS SHOWN

SET TERMINATOR SWITCH

ON IF REQUIRED

NETWORK

COMMUNICATIONS

NETWORK

CONNECT SHIELD

WIRES TOGETHER

CONNECT SHIELD

WIRES TOGETHER

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not

Requiring Common Signal Grounds

Note If using two conductor communication wire use the shield wire to connect all device signal grounds together as shown in the figure below If using three conductor communication wire use the 3rd conductor to connect all device signal grounds together and connect one side of the shield to earth ground

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

SIGNAL

GROUND

8

J2

SIGNAL

GROUND

8

J28

J2

USE SHIELD WIRE OR 3RD CONDUCTOR TO

CONNECT DEVICE SIGNAL GROUND TO

NETWORK SIGNAL GROUND

SET TERMINATOR SWITCH

ON IF REQUIRED

AAON AIRFLOW

SIGNAL PROCESSOR

NETWORK

COMMUNICATIONS

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

SIGNAL

GROUND

SIGNAL

GROUND

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds

39

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location

COMMUNICATION BOARD ID

BOARD SERIAL NO

40

Parameter Configuration 4112

If BACnet or Modbus communication is ordered the associated settings will need to be

configured with the exception of Modbus communication with WattMaster Controls which has

been configured at the factory To set the parameters refer to the following procedure below

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 41121

through 41124 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

41121 MAC Address (BACnet Communication Option)

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network Each AAON Airflow Signal

Processor must have a unique MAC Address assigned ranging from 2 to 127

Tech Config

Password 1000

4PT Flow Corr MAC Address

MAC Address (Range = 02 to 254)

Instance Number

Modbus ID (002)

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 22: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

22

4861 AutoZero Status

The AutoZero Status Menu allows the user to turn the AutoZero function ON or OFF

Field Setup

Menu

Flow Correction AZ Status AZ Status

AutoZero AZ Interval (ONOFF)

Temp Comp AZ Test Interval

Display Filter (ON)

4862 AutoZero Interval

The AutoZero Interval Menu allows the user to select the AutoZero Interval from once an hour

to once a day in 1 hour increments Use the UPDOWN keys to select the interval value Upon

device power up an AutoZero cycle will occur after 20 seconds

Field Setup

Menu

Flow Correction AZ Status AZ Interval

AutoZero AZ Interval (1 TO 24HR)

Temp Comp AZ Test Interval

Display Filter (01)HR

4863 AutoZero Test Interval

For troubleshooting or testing the AutoZero function the AutoZero Test Interval Menu allows

the user to select an Auto Zero test frequency of once a minute to once every 30 minutes in 1

minute increments Use the UPDOWN keys to select the interval value If AutoZero Test

Interval is turned ON for more than 60 minutes it will automatically default to OFF and the

AutoZero Interval (see Section 4862) will be reactivated

Field Setup

Menu

Flow Correction AZ Status AZ Test Interval

AutoZero AZ Interval (OFF)

Temp Comp AZ Test Interval Interval

Display Filter (1)Min

Temperature Compensation 487

The Temperature Compensation option compensates the flow and velocity signal for density

changes caused by variations in the process air temperature An input signal from AAON

Temperature Transmitter is required see Section 33 for proper temperature transmitter

connection and Section 452 for temperature input signal configuration

23

4871 Temperature Units

The Temperature Units Menu allows the user to select the appropriate temperature units for the

job The default setting is ordmF

Field Setup

Menu

Flow Correction Temperature Units Units

AutoZero Temperature Values (ordmF ordmC)

Temp Comp Temperature Input

Display Filter Fixed Value (ordmF)

4872 Temperature Values

The Temperature Values Menu allows the factory or user to set the minimum and maximum

temperature range values that represent the input signal from the external temperature transmitter

or the building automation system Since the AAON Temperature Transmitter has been supplied

the minimum and maximum temperature range values of -30degF to 130degF have been

preprogramed

Field Setup

Menu

Flow Correction Temperature Units Minimum Value

AutoZero Temperature Values (-030)

Temp Comp Temperature Input Maximum Value

Display Filter Fixed Value (130)

If the temperature values are changed from the factory settings and the new temperature values

cause the existing Operating Range Value to be outside the new calculated Minimum or

Maximum Full Scale Value the below Warning Message will appear and the Operating Range

will be reset to the new Maximum Full Scale Value by pressing Enter The display will

automatically jump to the Operating Range Menu allowing the user to enter a new Operating

Range Value This can be accomplished by performing the steps under Section 481 See

Temperature Range Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

24

Minimum Value

(-000)

Maximum Value

(000)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Min amp

Max Temperature

value and pressing the

Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Temperature Range Example-

Minimum Value

(-000)

Accepted

(100)

4873 Temperature Input

The Temperature Input Menu allows the user to select between three temperature input options

(Fixed Variable and Network) for the flow calculations Since the AAON Temperature

Transmitter has been supplied Variable has been selected If Fixed is selected the default

temperature value entered in the Fixed Value Menu (see Section 4874) is used If Net is

selected the temperature input signal is obtained through network communications The Net

option is only available if one of the communication options is ordered The temperature value

is only displayed on the LCD screen if the Temperature Input is set to Variable or Network

Field Setup

Menu

Flow Correction Temperature Units Temp Input

AutoZero Temperature Values (FixVarNet)

Temp Comp Temperature Input

Display Filter Fixed Value (Variable)

25

4874 Fixed Value

The Fixed Value Menu allows the user to enter a temperature value for the flow calculations

This value will not be displayed on the LCD screen

Field Setup

Menu

Flow Correction Temperature Units Fixed Value

AutoZero Temperature Values (˚F)

Temp Comp Temperature Input

Display Filter Fixed Value (+068)

Display Filter 488

The Display Filter Menu allows the user to adjust the Display Filter rolling average algorithm by

setting the Sample Interval Time value in seconds and the number of rolling average Sample

Counts The adjustment range of the Sample Interval Time is 010 to 655 seconds in 010

increments The Sample Count range is 0 to 150 Sample Counts The Display Filter is

independent of the Process Output Filter Value (See Section 489)

Field Setup

Menu

Flow Correction Sample Interval Time

AutoZero (005)sec

Temp Comp (0-150) Sample Count

Display Filter (010)

Process Output Filter 489

The Process Output Filter Menu allows the user to adjust the Process Output Filters rolling

average algorithm by setting the Sample Interval Time value in seconds and the number of

rolling average Sample Counts The adjustment range of the Sample Interval Time is 010 to

655 seconds in 010 increments The Sample Count range is 0 to 150 Sample Counts The

Process Output Filter is independent of the Display Filter Value (See Section 488)

Field Setup

Menu

Output Filter Sample Interval Time

Alarm Options (005)sec

Factory Defaults (0-150) Sample Count

(010)

26

HighLow Alarm Option 4810

The following menus for configuration of HighLow Alarms are only available if the HighLow

Alarm option is purchased

48101 Alarm Status

The Alarm Status allows the user to independently turn each alarm ON or OFF

Field Setup

Menu

Output Filter Alarm Status Low Alarm

Alarm Options Alarm Value (On)

Factory Defaults Alarm Delay High Alarm

(On)

48102 Alarm Values

The Alarm Value Menu allows the user to enter the Low or the High flow alarm value Alarm

values will be displayed in the same engineering units selected in the Eng Units Menu (see

Section 483)

- High Alarm Function The High Alarm activates if the flow exceeds the High Alarm

value and resets when the flow drops below the High Alarm Value

- Low Alarm Function The Low Alarm activates if the flow drops below the Low

Alarm Value and resets when the flow exceeds the Low Alarm Value

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Value

Alarm Options Alarm Value (000000)

Factory Defaults Alarm Delay Hi Alarm Value

(100000)

48103 Alarm Delay

The Alarm Delay Menu allows the user to enter an alarm delay of 0 to 999 seconds before an

alarm will be activated The alarm will be reset without a delay

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Delay

Alarm Options Alarm Value (000)Seconds

Factory Defaults Alarm Delay Hi Alarm Delay

(000)Seconds

27

Factory Defaults 4811

If parameter configuration changes have been made incorrectly to the AAON Airflow Signal

Processor all device settings can be restored to the original AAON factory settings by selecting

YES and pressing Enter in both the Set To Factory Defaults Menu and the Verify Set To Factory

Defaults Menu (see Table 7 below for a list of Saved Settings)

Field Setup

Menu

Output Filter Set To Verify Set To

Alarm Options Factory Defaults Factory Defaults

Factory Defaults

(No) (No)

Table 7 - Factory Defaults

Item Saved Setting Item Saved Setting

1 All Factory Calibration Points (12) 14 MAC Address

2 Area Factor 15 Instance Number

3 Operating Range 16 Engineering Units

4 4 Pt Flow Correction 17 Display Filter Values

5 Altitude 18 Output Filter

6 K-Factor 19 DP Display Format

7 Lockdown amp Delay Values 20 Output Calibration

8 Flow Correction 21 AutoZero Status

9 Flow Coefficient 22 AutoZero Interval

10 Min amp Max Temp Range Values 23 Temp Units

11 Alarm Status 24 Temp Input

12 Alarm Values 25 Temp Fixed Value

13 Alarm Delay 26 Baud Rate

28

49 TECH CONFIGURATION MENUS

To set parameters under the Tech Configuration Menu refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 491

through 4911 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

Area Factor 491

To convert the differential pressure signal from the AAON Airflow Station to a flow value the

Area Factor associated with the AAON Airflow Station has been preprogramed by the factory

If the Area Factor needs to be checked or reconfigured the correct Area Factor for the AAON

Airflow Station can be found on the AAON Airflow Station product label installed in the air

handling unit

Tech Config

Password 1000

Area Factor Area Factor

Min Calibration (FT2)

Span Calibration

Altitude (001000)

29

If the Area Factor is reconfigured and the new Area Factor causes the existing Operating Range

Value to be outside the new calculated Minimum or Maximum Full Scale Value the below

Warning Message will appear and the Operating Range will be reset to the new Maximum Full

Scale Value by pressing Enter The display will automatically jump to the Operating Range

Menu allowing the user to enter a new Operating Range Value This can be accomplished by

performing the steps under Section 481 See Area Factor Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Area Factor

(FT )

(001000)

Area Factor

(FT )

Accepted

(001200)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Area

Factor and pressing

the Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Area Factor Example-

2

2

30

Minimum Calibration 492

The Minimum Calibration Menu allows a user to perform a minimum transducer calibration

This value will be placed in a different memory location and used until a Return to Factory

Defaults is selected (see Section 4811)

(Caution Before performing a minimum calibration disconnect the Total (High) and Static

(Low) Pressure connections perform a minimum calibration and then reconnect the Total

and Static Pressure connections)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00000) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Span Calibration 493

The Span Calibration Menu allows the user to perform a span transducer calibration to eliminate

any possible transducer drift This value will be placed in a different memory location than the

Factory Span memory location and used until a Return to Factory Defaults is selected (see

Section 4811)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00570) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Altitude 494

The Altitude Menu allows the user to enter the specific altitude for the job for the density

calculations the job specific site Altitude has been preprogramed by the factory

Tech Config

Password 1000

Area Factor Altitude

Min Calibration

Span Calibration (0000)Ft

Altitude

31

If the Altitude is changed from the factory setting and the new Altitude causes the existing

Operating Range Value to be outside the new calculated Minimum or Maximum Full Scale

Value the below Warning Message will appear and the Operating Range will be reset to the new

Maximum Full Scale Value by pressing Enter The display will automatically jump to the

Operating Range Menu allowing the user to enter a new Operating Range Value This can be

accomplished by performing the steps under Section 481 See Altitude Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Altitude

(0000)Ft

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Altitude

and pressing the Enter

button will calculate

new Min amp Max Op

Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Altitude Example-

Altitude

Accepted

(0100)Ft

32

Process Output Calibration 495

4951 Minimum Calibration

The Minimum Calibration Menu allows the user to make output zero adjustments Monitor the

output and with each Up or Down key depression the output will increase or decrease by

001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

4952 Span Calibration

The Span Calibration Menu allows the user to make output span adjustments Span adjustments

require a low pressure air source adjusted to the Full Scale Value shown on the side label

Monitor the output and with each Up or Down button depression the output will increase or

decrease by 001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

Probe Coefficient 496

The Probe Correction Coefficient Menu allows the user to modify the formula constant of

109670 used for non-amplified Pitot-type flow sensors

Tech Config

Password 1000

Output Calibration Correction Coeff

Correction Coeff Probe

4PT Flow Corr (109670)

MAC Address (00109670)

33

Four Point Flow Correction 497

The Four Point Flow Correction Menu allows the user to make corrections to the display and

output signal at 20 increments between 20 and 80 of the Operating Range Value entered

The Displayed Value is a fixed value determined by the percentage of Operating Range The

Measured Value is the value determined by an independent balancerrsquos reading

Tech Config

Password 1000

Output Calibration 80000 CFM Displayed Value

Correction Coeff 60000 CFM 80000

4PT Flow Corr 40000 CFM Measured Value

MAC Address 20000 CFM 79500

80000 CFM Displayed Value

60000 CFM 60000

40000 CFM Measured Value

20000 CFM 60500

80000 CFM Displayed Value

60000 CFM 40000

40000 CFM Measured Value

20000 CFM 40100

80000 CFM Displayed Value

60000 CFM 20000

40000 CFM Measured Value

20000 CFM 19500

MAC Address (BACnet Communication Option) 498

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network The default is 002 For

additional information refer to Section 411

Tech Config

Password 1000

Output Calibration MAC Address

Correction Coeff (Range = 02 to 254)

4PT Flow Corr

MAC Address (002)

34

Instance Number (BACnet Communication Option) 499

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The default is 1002 For

additional information refer to Section 411

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (Default = 1002)

Instance Number

Modbus ID (01002)

Modbus ID (Modbus Communication Option) 4910

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network The default is 002 For

communication with WattMaster Controls the Modbus ID has been set by the factory to 009 for

outside airflow applications For additional information refer to the Section 411

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

Baud Rate (BACnet amp Modbus Communication Options) 4911

The Baud Rate Menu allows the user to set a unique network baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate Modbus communications supports

96 192 384 576 and 1152 Kbps baud rate The default is 384 Kbps For communication

with WattMaster Controls the Baud Rate has been set by the factory to 96 Kbps For additional

information refer to Section 411

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

35

410 WARNING MESSAGES

Input Pressure Overrange Message 4101

If the input pressure exceeds the entered Operating Range Value the following message will

appear on the display It will alternate between the process display and the error message until

the input falls below the Operating Range Value

- Caution -

Input Beyond

Operating Range

Selected

Transducer Calibration Message 4102

If during a transducer zero or span calibration process the transducer output pressure value

measured exceeds plusmn20 of the expected value the following message will appear on the display

Once the Enter button is pressed the display returns to the previous calibration menu

Value entered is

Outside Factory

set limits

(Press Enter)

Operating Range Message 4103

If the new values entered for Temperature Compensation Area Factor or Altitude (see Sections

487 491 and 494) causes the Operating Range Value to exceed the new calculated

Maximum Full Scale Value the following message will appear on the display

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

New Operating Range Message 4104

If a user enters a new Operating Range Value the following message will appear on the display

notifying the user that if any 4 PT Flow Correction Values (see Section 497) were previously

entered they will be reset The message allows the user to confirm that the Operating Range

change should be made To complete the Operating Range change the user must use the

UPDown buttons to change the NO to a YES and press the ENTER button

Value will

Reset 4PT

Flow Correction

Values

Make the Change

(NO)

(Press Enter)

36

411 NETWORK COMMUNICATION

The AAON Airflow Signal Processor can be ordered with BACnet Modbus or LonWorks

Communication For BACnet Communication the AAON Airflow Signal Processors utilize

MSTP (Master SlaveToken Passing) BACnet type protocol BACnet is implemented using

EIA-485 signaling standards through a shielded twisted pair wire operating at a baud rate of 96

Kbps to 768 Kbps Each device has a unique MAC Address ranging from 2 to 127 Refer to

Section 4113 for BACnet Protocol Implementation Conformance Statements (PICS) For

Modbus Communication the AAON Airflow Signal Processors utilize the Modbus ndash RTU Slave

protocol using EIA-485 signaling standards through a shielded twisted pair wire operating at a

baud rate of 96 Kbps to 1152 Kbps Each device has a unique Modbus ID ranging from 1 to

254 Refer to Section 4114 for Modbus software configuration parameters For LonWorks

Communication each AAON Airflow Signal Processor has a unique Neuron Chip ID which is

loaded on the network by pressing a service switch located on the main board (see Section

4111 Figure 7) The LonWorks network utilizes a shielded twisted pair wire operating at a

fixed baud rate of 78 Kbps Refer to Section 4115 for LonWorks network variables

Sections 4111 and 4112 contain procedures for electrical connection of the AAON Airflow

Signal Processor to the network and for configuring the required communication parameters

Electrical Connection 4111

The following procedure outlines the steps for installing the interface wiring for network

communication Network wire should be low capacitance shielded 22 or 24 AWG twisted pair

with PVC jacket such as Belden Part numbers 9841 3105A or equivalent

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Verify that the Power Switch (S3) is in the OFF position and install the interface

wiring for Pins 9 and 10 as shown in Figure 7 If multiple AAON Airflow Signal

Processors will be connected to the same network see Figure 8 for connecting

multiple devices For network systems that require all devices to have a common

signal ground refer to Figure 9 for electrical connection The J2 electrical

connector has a removable terminal block for ease of installing the interface

wiring

Step 4 For proper operation of BACnet and Modbus communication networks the

device that is electrically installed at the end of the network may require the

Terminator Switch be moved to the ON position to prevent line and data

reflection If Terminator is required it must be applied to both physical ends of

the network All other devices should have the Terminator Switch in the OFF

position The communication board is located on the back side of the main

AAON Airflow Signal Processor board See Figure 10 below for Terminator

Switch location on the communication board

Step 5 For LonWorks Communication refer to Figure 7 for the location of the Lon

Service Pin

37

Step 6 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 7 Configure the required parameters as outlined in Section 4112

Step 8 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

RP1

S3

NETWORK

COMMUNICATION+

-

LON

SERVICE PIN

Figure 7 - Network Communication Electrical Connection

38

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

AAON AIRFLOW

SIGNAL PROCESSOR

CONNECT ONLY ONE END OF SHIELD

WIRE TO EARTH GROUND AS SHOWN

SET TERMINATOR SWITCH

ON IF REQUIRED

NETWORK

COMMUNICATIONS

NETWORK

CONNECT SHIELD

WIRES TOGETHER

CONNECT SHIELD

WIRES TOGETHER

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not

Requiring Common Signal Grounds

Note If using two conductor communication wire use the shield wire to connect all device signal grounds together as shown in the figure below If using three conductor communication wire use the 3rd conductor to connect all device signal grounds together and connect one side of the shield to earth ground

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

SIGNAL

GROUND

8

J2

SIGNAL

GROUND

8

J28

J2

USE SHIELD WIRE OR 3RD CONDUCTOR TO

CONNECT DEVICE SIGNAL GROUND TO

NETWORK SIGNAL GROUND

SET TERMINATOR SWITCH

ON IF REQUIRED

AAON AIRFLOW

SIGNAL PROCESSOR

NETWORK

COMMUNICATIONS

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

SIGNAL

GROUND

SIGNAL

GROUND

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds

39

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location

COMMUNICATION BOARD ID

BOARD SERIAL NO

40

Parameter Configuration 4112

If BACnet or Modbus communication is ordered the associated settings will need to be

configured with the exception of Modbus communication with WattMaster Controls which has

been configured at the factory To set the parameters refer to the following procedure below

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 41121

through 41124 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

41121 MAC Address (BACnet Communication Option)

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network Each AAON Airflow Signal

Processor must have a unique MAC Address assigned ranging from 2 to 127

Tech Config

Password 1000

4PT Flow Corr MAC Address

MAC Address (Range = 02 to 254)

Instance Number

Modbus ID (002)

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 23: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

23

4871 Temperature Units

The Temperature Units Menu allows the user to select the appropriate temperature units for the

job The default setting is ordmF

Field Setup

Menu

Flow Correction Temperature Units Units

AutoZero Temperature Values (ordmF ordmC)

Temp Comp Temperature Input

Display Filter Fixed Value (ordmF)

4872 Temperature Values

The Temperature Values Menu allows the factory or user to set the minimum and maximum

temperature range values that represent the input signal from the external temperature transmitter

or the building automation system Since the AAON Temperature Transmitter has been supplied

the minimum and maximum temperature range values of -30degF to 130degF have been

preprogramed

Field Setup

Menu

Flow Correction Temperature Units Minimum Value

AutoZero Temperature Values (-030)

Temp Comp Temperature Input Maximum Value

Display Filter Fixed Value (130)

If the temperature values are changed from the factory settings and the new temperature values

cause the existing Operating Range Value to be outside the new calculated Minimum or

Maximum Full Scale Value the below Warning Message will appear and the Operating Range

will be reset to the new Maximum Full Scale Value by pressing Enter The display will

automatically jump to the Operating Range Menu allowing the user to enter a new Operating

Range Value This can be accomplished by performing the steps under Section 481 See

Temperature Range Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

24

Minimum Value

(-000)

Maximum Value

(000)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Min amp

Max Temperature

value and pressing the

Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Temperature Range Example-

Minimum Value

(-000)

Accepted

(100)

4873 Temperature Input

The Temperature Input Menu allows the user to select between three temperature input options

(Fixed Variable and Network) for the flow calculations Since the AAON Temperature

Transmitter has been supplied Variable has been selected If Fixed is selected the default

temperature value entered in the Fixed Value Menu (see Section 4874) is used If Net is

selected the temperature input signal is obtained through network communications The Net

option is only available if one of the communication options is ordered The temperature value

is only displayed on the LCD screen if the Temperature Input is set to Variable or Network

Field Setup

Menu

Flow Correction Temperature Units Temp Input

AutoZero Temperature Values (FixVarNet)

Temp Comp Temperature Input

Display Filter Fixed Value (Variable)

25

4874 Fixed Value

The Fixed Value Menu allows the user to enter a temperature value for the flow calculations

This value will not be displayed on the LCD screen

Field Setup

Menu

Flow Correction Temperature Units Fixed Value

AutoZero Temperature Values (˚F)

Temp Comp Temperature Input

Display Filter Fixed Value (+068)

Display Filter 488

The Display Filter Menu allows the user to adjust the Display Filter rolling average algorithm by

setting the Sample Interval Time value in seconds and the number of rolling average Sample

Counts The adjustment range of the Sample Interval Time is 010 to 655 seconds in 010

increments The Sample Count range is 0 to 150 Sample Counts The Display Filter is

independent of the Process Output Filter Value (See Section 489)

Field Setup

Menu

Flow Correction Sample Interval Time

AutoZero (005)sec

Temp Comp (0-150) Sample Count

Display Filter (010)

Process Output Filter 489

The Process Output Filter Menu allows the user to adjust the Process Output Filters rolling

average algorithm by setting the Sample Interval Time value in seconds and the number of

rolling average Sample Counts The adjustment range of the Sample Interval Time is 010 to

655 seconds in 010 increments The Sample Count range is 0 to 150 Sample Counts The

Process Output Filter is independent of the Display Filter Value (See Section 488)

Field Setup

Menu

Output Filter Sample Interval Time

Alarm Options (005)sec

Factory Defaults (0-150) Sample Count

(010)

26

HighLow Alarm Option 4810

The following menus for configuration of HighLow Alarms are only available if the HighLow

Alarm option is purchased

48101 Alarm Status

The Alarm Status allows the user to independently turn each alarm ON or OFF

Field Setup

Menu

Output Filter Alarm Status Low Alarm

Alarm Options Alarm Value (On)

Factory Defaults Alarm Delay High Alarm

(On)

48102 Alarm Values

The Alarm Value Menu allows the user to enter the Low or the High flow alarm value Alarm

values will be displayed in the same engineering units selected in the Eng Units Menu (see

Section 483)

- High Alarm Function The High Alarm activates if the flow exceeds the High Alarm

value and resets when the flow drops below the High Alarm Value

- Low Alarm Function The Low Alarm activates if the flow drops below the Low

Alarm Value and resets when the flow exceeds the Low Alarm Value

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Value

Alarm Options Alarm Value (000000)

Factory Defaults Alarm Delay Hi Alarm Value

(100000)

48103 Alarm Delay

The Alarm Delay Menu allows the user to enter an alarm delay of 0 to 999 seconds before an

alarm will be activated The alarm will be reset without a delay

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Delay

Alarm Options Alarm Value (000)Seconds

Factory Defaults Alarm Delay Hi Alarm Delay

(000)Seconds

27

Factory Defaults 4811

If parameter configuration changes have been made incorrectly to the AAON Airflow Signal

Processor all device settings can be restored to the original AAON factory settings by selecting

YES and pressing Enter in both the Set To Factory Defaults Menu and the Verify Set To Factory

Defaults Menu (see Table 7 below for a list of Saved Settings)

Field Setup

Menu

Output Filter Set To Verify Set To

Alarm Options Factory Defaults Factory Defaults

Factory Defaults

(No) (No)

Table 7 - Factory Defaults

Item Saved Setting Item Saved Setting

1 All Factory Calibration Points (12) 14 MAC Address

2 Area Factor 15 Instance Number

3 Operating Range 16 Engineering Units

4 4 Pt Flow Correction 17 Display Filter Values

5 Altitude 18 Output Filter

6 K-Factor 19 DP Display Format

7 Lockdown amp Delay Values 20 Output Calibration

8 Flow Correction 21 AutoZero Status

9 Flow Coefficient 22 AutoZero Interval

10 Min amp Max Temp Range Values 23 Temp Units

11 Alarm Status 24 Temp Input

12 Alarm Values 25 Temp Fixed Value

13 Alarm Delay 26 Baud Rate

28

49 TECH CONFIGURATION MENUS

To set parameters under the Tech Configuration Menu refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 491

through 4911 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

Area Factor 491

To convert the differential pressure signal from the AAON Airflow Station to a flow value the

Area Factor associated with the AAON Airflow Station has been preprogramed by the factory

If the Area Factor needs to be checked or reconfigured the correct Area Factor for the AAON

Airflow Station can be found on the AAON Airflow Station product label installed in the air

handling unit

Tech Config

Password 1000

Area Factor Area Factor

Min Calibration (FT2)

Span Calibration

Altitude (001000)

29

If the Area Factor is reconfigured and the new Area Factor causes the existing Operating Range

Value to be outside the new calculated Minimum or Maximum Full Scale Value the below

Warning Message will appear and the Operating Range will be reset to the new Maximum Full

Scale Value by pressing Enter The display will automatically jump to the Operating Range

Menu allowing the user to enter a new Operating Range Value This can be accomplished by

performing the steps under Section 481 See Area Factor Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Area Factor

(FT )

(001000)

Area Factor

(FT )

Accepted

(001200)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Area

Factor and pressing

the Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Area Factor Example-

2

2

30

Minimum Calibration 492

The Minimum Calibration Menu allows a user to perform a minimum transducer calibration

This value will be placed in a different memory location and used until a Return to Factory

Defaults is selected (see Section 4811)

(Caution Before performing a minimum calibration disconnect the Total (High) and Static

(Low) Pressure connections perform a minimum calibration and then reconnect the Total

and Static Pressure connections)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00000) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Span Calibration 493

The Span Calibration Menu allows the user to perform a span transducer calibration to eliminate

any possible transducer drift This value will be placed in a different memory location than the

Factory Span memory location and used until a Return to Factory Defaults is selected (see

Section 4811)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00570) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Altitude 494

The Altitude Menu allows the user to enter the specific altitude for the job for the density

calculations the job specific site Altitude has been preprogramed by the factory

Tech Config

Password 1000

Area Factor Altitude

Min Calibration

Span Calibration (0000)Ft

Altitude

31

If the Altitude is changed from the factory setting and the new Altitude causes the existing

Operating Range Value to be outside the new calculated Minimum or Maximum Full Scale

Value the below Warning Message will appear and the Operating Range will be reset to the new

Maximum Full Scale Value by pressing Enter The display will automatically jump to the

Operating Range Menu allowing the user to enter a new Operating Range Value This can be

accomplished by performing the steps under Section 481 See Altitude Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Altitude

(0000)Ft

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Altitude

and pressing the Enter

button will calculate

new Min amp Max Op

Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Altitude Example-

Altitude

Accepted

(0100)Ft

32

Process Output Calibration 495

4951 Minimum Calibration

The Minimum Calibration Menu allows the user to make output zero adjustments Monitor the

output and with each Up or Down key depression the output will increase or decrease by

001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

4952 Span Calibration

The Span Calibration Menu allows the user to make output span adjustments Span adjustments

require a low pressure air source adjusted to the Full Scale Value shown on the side label

Monitor the output and with each Up or Down button depression the output will increase or

decrease by 001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

Probe Coefficient 496

The Probe Correction Coefficient Menu allows the user to modify the formula constant of

109670 used for non-amplified Pitot-type flow sensors

Tech Config

Password 1000

Output Calibration Correction Coeff

Correction Coeff Probe

4PT Flow Corr (109670)

MAC Address (00109670)

33

Four Point Flow Correction 497

The Four Point Flow Correction Menu allows the user to make corrections to the display and

output signal at 20 increments between 20 and 80 of the Operating Range Value entered

The Displayed Value is a fixed value determined by the percentage of Operating Range The

Measured Value is the value determined by an independent balancerrsquos reading

Tech Config

Password 1000

Output Calibration 80000 CFM Displayed Value

Correction Coeff 60000 CFM 80000

4PT Flow Corr 40000 CFM Measured Value

MAC Address 20000 CFM 79500

80000 CFM Displayed Value

60000 CFM 60000

40000 CFM Measured Value

20000 CFM 60500

80000 CFM Displayed Value

60000 CFM 40000

40000 CFM Measured Value

20000 CFM 40100

80000 CFM Displayed Value

60000 CFM 20000

40000 CFM Measured Value

20000 CFM 19500

MAC Address (BACnet Communication Option) 498

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network The default is 002 For

additional information refer to Section 411

Tech Config

Password 1000

Output Calibration MAC Address

Correction Coeff (Range = 02 to 254)

4PT Flow Corr

MAC Address (002)

34

Instance Number (BACnet Communication Option) 499

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The default is 1002 For

additional information refer to Section 411

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (Default = 1002)

Instance Number

Modbus ID (01002)

Modbus ID (Modbus Communication Option) 4910

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network The default is 002 For

communication with WattMaster Controls the Modbus ID has been set by the factory to 009 for

outside airflow applications For additional information refer to the Section 411

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

Baud Rate (BACnet amp Modbus Communication Options) 4911

The Baud Rate Menu allows the user to set a unique network baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate Modbus communications supports

96 192 384 576 and 1152 Kbps baud rate The default is 384 Kbps For communication

with WattMaster Controls the Baud Rate has been set by the factory to 96 Kbps For additional

information refer to Section 411

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

35

410 WARNING MESSAGES

Input Pressure Overrange Message 4101

If the input pressure exceeds the entered Operating Range Value the following message will

appear on the display It will alternate between the process display and the error message until

the input falls below the Operating Range Value

- Caution -

Input Beyond

Operating Range

Selected

Transducer Calibration Message 4102

If during a transducer zero or span calibration process the transducer output pressure value

measured exceeds plusmn20 of the expected value the following message will appear on the display

Once the Enter button is pressed the display returns to the previous calibration menu

Value entered is

Outside Factory

set limits

(Press Enter)

Operating Range Message 4103

If the new values entered for Temperature Compensation Area Factor or Altitude (see Sections

487 491 and 494) causes the Operating Range Value to exceed the new calculated

Maximum Full Scale Value the following message will appear on the display

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

New Operating Range Message 4104

If a user enters a new Operating Range Value the following message will appear on the display

notifying the user that if any 4 PT Flow Correction Values (see Section 497) were previously

entered they will be reset The message allows the user to confirm that the Operating Range

change should be made To complete the Operating Range change the user must use the

UPDown buttons to change the NO to a YES and press the ENTER button

Value will

Reset 4PT

Flow Correction

Values

Make the Change

(NO)

(Press Enter)

36

411 NETWORK COMMUNICATION

The AAON Airflow Signal Processor can be ordered with BACnet Modbus or LonWorks

Communication For BACnet Communication the AAON Airflow Signal Processors utilize

MSTP (Master SlaveToken Passing) BACnet type protocol BACnet is implemented using

EIA-485 signaling standards through a shielded twisted pair wire operating at a baud rate of 96

Kbps to 768 Kbps Each device has a unique MAC Address ranging from 2 to 127 Refer to

Section 4113 for BACnet Protocol Implementation Conformance Statements (PICS) For

Modbus Communication the AAON Airflow Signal Processors utilize the Modbus ndash RTU Slave

protocol using EIA-485 signaling standards through a shielded twisted pair wire operating at a

baud rate of 96 Kbps to 1152 Kbps Each device has a unique Modbus ID ranging from 1 to

254 Refer to Section 4114 for Modbus software configuration parameters For LonWorks

Communication each AAON Airflow Signal Processor has a unique Neuron Chip ID which is

loaded on the network by pressing a service switch located on the main board (see Section

4111 Figure 7) The LonWorks network utilizes a shielded twisted pair wire operating at a

fixed baud rate of 78 Kbps Refer to Section 4115 for LonWorks network variables

Sections 4111 and 4112 contain procedures for electrical connection of the AAON Airflow

Signal Processor to the network and for configuring the required communication parameters

Electrical Connection 4111

The following procedure outlines the steps for installing the interface wiring for network

communication Network wire should be low capacitance shielded 22 or 24 AWG twisted pair

with PVC jacket such as Belden Part numbers 9841 3105A or equivalent

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Verify that the Power Switch (S3) is in the OFF position and install the interface

wiring for Pins 9 and 10 as shown in Figure 7 If multiple AAON Airflow Signal

Processors will be connected to the same network see Figure 8 for connecting

multiple devices For network systems that require all devices to have a common

signal ground refer to Figure 9 for electrical connection The J2 electrical

connector has a removable terminal block for ease of installing the interface

wiring

Step 4 For proper operation of BACnet and Modbus communication networks the

device that is electrically installed at the end of the network may require the

Terminator Switch be moved to the ON position to prevent line and data

reflection If Terminator is required it must be applied to both physical ends of

the network All other devices should have the Terminator Switch in the OFF

position The communication board is located on the back side of the main

AAON Airflow Signal Processor board See Figure 10 below for Terminator

Switch location on the communication board

Step 5 For LonWorks Communication refer to Figure 7 for the location of the Lon

Service Pin

37

Step 6 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 7 Configure the required parameters as outlined in Section 4112

Step 8 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

RP1

S3

NETWORK

COMMUNICATION+

-

LON

SERVICE PIN

Figure 7 - Network Communication Electrical Connection

38

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

AAON AIRFLOW

SIGNAL PROCESSOR

CONNECT ONLY ONE END OF SHIELD

WIRE TO EARTH GROUND AS SHOWN

SET TERMINATOR SWITCH

ON IF REQUIRED

NETWORK

COMMUNICATIONS

NETWORK

CONNECT SHIELD

WIRES TOGETHER

CONNECT SHIELD

WIRES TOGETHER

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not

Requiring Common Signal Grounds

Note If using two conductor communication wire use the shield wire to connect all device signal grounds together as shown in the figure below If using three conductor communication wire use the 3rd conductor to connect all device signal grounds together and connect one side of the shield to earth ground

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

SIGNAL

GROUND

8

J2

SIGNAL

GROUND

8

J28

J2

USE SHIELD WIRE OR 3RD CONDUCTOR TO

CONNECT DEVICE SIGNAL GROUND TO

NETWORK SIGNAL GROUND

SET TERMINATOR SWITCH

ON IF REQUIRED

AAON AIRFLOW

SIGNAL PROCESSOR

NETWORK

COMMUNICATIONS

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

SIGNAL

GROUND

SIGNAL

GROUND

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds

39

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location

COMMUNICATION BOARD ID

BOARD SERIAL NO

40

Parameter Configuration 4112

If BACnet or Modbus communication is ordered the associated settings will need to be

configured with the exception of Modbus communication with WattMaster Controls which has

been configured at the factory To set the parameters refer to the following procedure below

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 41121

through 41124 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

41121 MAC Address (BACnet Communication Option)

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network Each AAON Airflow Signal

Processor must have a unique MAC Address assigned ranging from 2 to 127

Tech Config

Password 1000

4PT Flow Corr MAC Address

MAC Address (Range = 02 to 254)

Instance Number

Modbus ID (002)

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 24: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

24

Minimum Value

(-000)

Maximum Value

(000)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Min amp

Max Temperature

value and pressing the

Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Temperature Range Example-

Minimum Value

(-000)

Accepted

(100)

4873 Temperature Input

The Temperature Input Menu allows the user to select between three temperature input options

(Fixed Variable and Network) for the flow calculations Since the AAON Temperature

Transmitter has been supplied Variable has been selected If Fixed is selected the default

temperature value entered in the Fixed Value Menu (see Section 4874) is used If Net is

selected the temperature input signal is obtained through network communications The Net

option is only available if one of the communication options is ordered The temperature value

is only displayed on the LCD screen if the Temperature Input is set to Variable or Network

Field Setup

Menu

Flow Correction Temperature Units Temp Input

AutoZero Temperature Values (FixVarNet)

Temp Comp Temperature Input

Display Filter Fixed Value (Variable)

25

4874 Fixed Value

The Fixed Value Menu allows the user to enter a temperature value for the flow calculations

This value will not be displayed on the LCD screen

Field Setup

Menu

Flow Correction Temperature Units Fixed Value

AutoZero Temperature Values (˚F)

Temp Comp Temperature Input

Display Filter Fixed Value (+068)

Display Filter 488

The Display Filter Menu allows the user to adjust the Display Filter rolling average algorithm by

setting the Sample Interval Time value in seconds and the number of rolling average Sample

Counts The adjustment range of the Sample Interval Time is 010 to 655 seconds in 010

increments The Sample Count range is 0 to 150 Sample Counts The Display Filter is

independent of the Process Output Filter Value (See Section 489)

Field Setup

Menu

Flow Correction Sample Interval Time

AutoZero (005)sec

Temp Comp (0-150) Sample Count

Display Filter (010)

Process Output Filter 489

The Process Output Filter Menu allows the user to adjust the Process Output Filters rolling

average algorithm by setting the Sample Interval Time value in seconds and the number of

rolling average Sample Counts The adjustment range of the Sample Interval Time is 010 to

655 seconds in 010 increments The Sample Count range is 0 to 150 Sample Counts The

Process Output Filter is independent of the Display Filter Value (See Section 488)

Field Setup

Menu

Output Filter Sample Interval Time

Alarm Options (005)sec

Factory Defaults (0-150) Sample Count

(010)

26

HighLow Alarm Option 4810

The following menus for configuration of HighLow Alarms are only available if the HighLow

Alarm option is purchased

48101 Alarm Status

The Alarm Status allows the user to independently turn each alarm ON or OFF

Field Setup

Menu

Output Filter Alarm Status Low Alarm

Alarm Options Alarm Value (On)

Factory Defaults Alarm Delay High Alarm

(On)

48102 Alarm Values

The Alarm Value Menu allows the user to enter the Low or the High flow alarm value Alarm

values will be displayed in the same engineering units selected in the Eng Units Menu (see

Section 483)

- High Alarm Function The High Alarm activates if the flow exceeds the High Alarm

value and resets when the flow drops below the High Alarm Value

- Low Alarm Function The Low Alarm activates if the flow drops below the Low

Alarm Value and resets when the flow exceeds the Low Alarm Value

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Value

Alarm Options Alarm Value (000000)

Factory Defaults Alarm Delay Hi Alarm Value

(100000)

48103 Alarm Delay

The Alarm Delay Menu allows the user to enter an alarm delay of 0 to 999 seconds before an

alarm will be activated The alarm will be reset without a delay

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Delay

Alarm Options Alarm Value (000)Seconds

Factory Defaults Alarm Delay Hi Alarm Delay

(000)Seconds

27

Factory Defaults 4811

If parameter configuration changes have been made incorrectly to the AAON Airflow Signal

Processor all device settings can be restored to the original AAON factory settings by selecting

YES and pressing Enter in both the Set To Factory Defaults Menu and the Verify Set To Factory

Defaults Menu (see Table 7 below for a list of Saved Settings)

Field Setup

Menu

Output Filter Set To Verify Set To

Alarm Options Factory Defaults Factory Defaults

Factory Defaults

(No) (No)

Table 7 - Factory Defaults

Item Saved Setting Item Saved Setting

1 All Factory Calibration Points (12) 14 MAC Address

2 Area Factor 15 Instance Number

3 Operating Range 16 Engineering Units

4 4 Pt Flow Correction 17 Display Filter Values

5 Altitude 18 Output Filter

6 K-Factor 19 DP Display Format

7 Lockdown amp Delay Values 20 Output Calibration

8 Flow Correction 21 AutoZero Status

9 Flow Coefficient 22 AutoZero Interval

10 Min amp Max Temp Range Values 23 Temp Units

11 Alarm Status 24 Temp Input

12 Alarm Values 25 Temp Fixed Value

13 Alarm Delay 26 Baud Rate

28

49 TECH CONFIGURATION MENUS

To set parameters under the Tech Configuration Menu refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 491

through 4911 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

Area Factor 491

To convert the differential pressure signal from the AAON Airflow Station to a flow value the

Area Factor associated with the AAON Airflow Station has been preprogramed by the factory

If the Area Factor needs to be checked or reconfigured the correct Area Factor for the AAON

Airflow Station can be found on the AAON Airflow Station product label installed in the air

handling unit

Tech Config

Password 1000

Area Factor Area Factor

Min Calibration (FT2)

Span Calibration

Altitude (001000)

29

If the Area Factor is reconfigured and the new Area Factor causes the existing Operating Range

Value to be outside the new calculated Minimum or Maximum Full Scale Value the below

Warning Message will appear and the Operating Range will be reset to the new Maximum Full

Scale Value by pressing Enter The display will automatically jump to the Operating Range

Menu allowing the user to enter a new Operating Range Value This can be accomplished by

performing the steps under Section 481 See Area Factor Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Area Factor

(FT )

(001000)

Area Factor

(FT )

Accepted

(001200)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Area

Factor and pressing

the Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Area Factor Example-

2

2

30

Minimum Calibration 492

The Minimum Calibration Menu allows a user to perform a minimum transducer calibration

This value will be placed in a different memory location and used until a Return to Factory

Defaults is selected (see Section 4811)

(Caution Before performing a minimum calibration disconnect the Total (High) and Static

(Low) Pressure connections perform a minimum calibration and then reconnect the Total

and Static Pressure connections)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00000) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Span Calibration 493

The Span Calibration Menu allows the user to perform a span transducer calibration to eliminate

any possible transducer drift This value will be placed in a different memory location than the

Factory Span memory location and used until a Return to Factory Defaults is selected (see

Section 4811)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00570) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Altitude 494

The Altitude Menu allows the user to enter the specific altitude for the job for the density

calculations the job specific site Altitude has been preprogramed by the factory

Tech Config

Password 1000

Area Factor Altitude

Min Calibration

Span Calibration (0000)Ft

Altitude

31

If the Altitude is changed from the factory setting and the new Altitude causes the existing

Operating Range Value to be outside the new calculated Minimum or Maximum Full Scale

Value the below Warning Message will appear and the Operating Range will be reset to the new

Maximum Full Scale Value by pressing Enter The display will automatically jump to the

Operating Range Menu allowing the user to enter a new Operating Range Value This can be

accomplished by performing the steps under Section 481 See Altitude Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Altitude

(0000)Ft

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Altitude

and pressing the Enter

button will calculate

new Min amp Max Op

Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Altitude Example-

Altitude

Accepted

(0100)Ft

32

Process Output Calibration 495

4951 Minimum Calibration

The Minimum Calibration Menu allows the user to make output zero adjustments Monitor the

output and with each Up or Down key depression the output will increase or decrease by

001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

4952 Span Calibration

The Span Calibration Menu allows the user to make output span adjustments Span adjustments

require a low pressure air source adjusted to the Full Scale Value shown on the side label

Monitor the output and with each Up or Down button depression the output will increase or

decrease by 001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

Probe Coefficient 496

The Probe Correction Coefficient Menu allows the user to modify the formula constant of

109670 used for non-amplified Pitot-type flow sensors

Tech Config

Password 1000

Output Calibration Correction Coeff

Correction Coeff Probe

4PT Flow Corr (109670)

MAC Address (00109670)

33

Four Point Flow Correction 497

The Four Point Flow Correction Menu allows the user to make corrections to the display and

output signal at 20 increments between 20 and 80 of the Operating Range Value entered

The Displayed Value is a fixed value determined by the percentage of Operating Range The

Measured Value is the value determined by an independent balancerrsquos reading

Tech Config

Password 1000

Output Calibration 80000 CFM Displayed Value

Correction Coeff 60000 CFM 80000

4PT Flow Corr 40000 CFM Measured Value

MAC Address 20000 CFM 79500

80000 CFM Displayed Value

60000 CFM 60000

40000 CFM Measured Value

20000 CFM 60500

80000 CFM Displayed Value

60000 CFM 40000

40000 CFM Measured Value

20000 CFM 40100

80000 CFM Displayed Value

60000 CFM 20000

40000 CFM Measured Value

20000 CFM 19500

MAC Address (BACnet Communication Option) 498

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network The default is 002 For

additional information refer to Section 411

Tech Config

Password 1000

Output Calibration MAC Address

Correction Coeff (Range = 02 to 254)

4PT Flow Corr

MAC Address (002)

34

Instance Number (BACnet Communication Option) 499

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The default is 1002 For

additional information refer to Section 411

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (Default = 1002)

Instance Number

Modbus ID (01002)

Modbus ID (Modbus Communication Option) 4910

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network The default is 002 For

communication with WattMaster Controls the Modbus ID has been set by the factory to 009 for

outside airflow applications For additional information refer to the Section 411

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

Baud Rate (BACnet amp Modbus Communication Options) 4911

The Baud Rate Menu allows the user to set a unique network baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate Modbus communications supports

96 192 384 576 and 1152 Kbps baud rate The default is 384 Kbps For communication

with WattMaster Controls the Baud Rate has been set by the factory to 96 Kbps For additional

information refer to Section 411

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

35

410 WARNING MESSAGES

Input Pressure Overrange Message 4101

If the input pressure exceeds the entered Operating Range Value the following message will

appear on the display It will alternate between the process display and the error message until

the input falls below the Operating Range Value

- Caution -

Input Beyond

Operating Range

Selected

Transducer Calibration Message 4102

If during a transducer zero or span calibration process the transducer output pressure value

measured exceeds plusmn20 of the expected value the following message will appear on the display

Once the Enter button is pressed the display returns to the previous calibration menu

Value entered is

Outside Factory

set limits

(Press Enter)

Operating Range Message 4103

If the new values entered for Temperature Compensation Area Factor or Altitude (see Sections

487 491 and 494) causes the Operating Range Value to exceed the new calculated

Maximum Full Scale Value the following message will appear on the display

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

New Operating Range Message 4104

If a user enters a new Operating Range Value the following message will appear on the display

notifying the user that if any 4 PT Flow Correction Values (see Section 497) were previously

entered they will be reset The message allows the user to confirm that the Operating Range

change should be made To complete the Operating Range change the user must use the

UPDown buttons to change the NO to a YES and press the ENTER button

Value will

Reset 4PT

Flow Correction

Values

Make the Change

(NO)

(Press Enter)

36

411 NETWORK COMMUNICATION

The AAON Airflow Signal Processor can be ordered with BACnet Modbus or LonWorks

Communication For BACnet Communication the AAON Airflow Signal Processors utilize

MSTP (Master SlaveToken Passing) BACnet type protocol BACnet is implemented using

EIA-485 signaling standards through a shielded twisted pair wire operating at a baud rate of 96

Kbps to 768 Kbps Each device has a unique MAC Address ranging from 2 to 127 Refer to

Section 4113 for BACnet Protocol Implementation Conformance Statements (PICS) For

Modbus Communication the AAON Airflow Signal Processors utilize the Modbus ndash RTU Slave

protocol using EIA-485 signaling standards through a shielded twisted pair wire operating at a

baud rate of 96 Kbps to 1152 Kbps Each device has a unique Modbus ID ranging from 1 to

254 Refer to Section 4114 for Modbus software configuration parameters For LonWorks

Communication each AAON Airflow Signal Processor has a unique Neuron Chip ID which is

loaded on the network by pressing a service switch located on the main board (see Section

4111 Figure 7) The LonWorks network utilizes a shielded twisted pair wire operating at a

fixed baud rate of 78 Kbps Refer to Section 4115 for LonWorks network variables

Sections 4111 and 4112 contain procedures for electrical connection of the AAON Airflow

Signal Processor to the network and for configuring the required communication parameters

Electrical Connection 4111

The following procedure outlines the steps for installing the interface wiring for network

communication Network wire should be low capacitance shielded 22 or 24 AWG twisted pair

with PVC jacket such as Belden Part numbers 9841 3105A or equivalent

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Verify that the Power Switch (S3) is in the OFF position and install the interface

wiring for Pins 9 and 10 as shown in Figure 7 If multiple AAON Airflow Signal

Processors will be connected to the same network see Figure 8 for connecting

multiple devices For network systems that require all devices to have a common

signal ground refer to Figure 9 for electrical connection The J2 electrical

connector has a removable terminal block for ease of installing the interface

wiring

Step 4 For proper operation of BACnet and Modbus communication networks the

device that is electrically installed at the end of the network may require the

Terminator Switch be moved to the ON position to prevent line and data

reflection If Terminator is required it must be applied to both physical ends of

the network All other devices should have the Terminator Switch in the OFF

position The communication board is located on the back side of the main

AAON Airflow Signal Processor board See Figure 10 below for Terminator

Switch location on the communication board

Step 5 For LonWorks Communication refer to Figure 7 for the location of the Lon

Service Pin

37

Step 6 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 7 Configure the required parameters as outlined in Section 4112

Step 8 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

RP1

S3

NETWORK

COMMUNICATION+

-

LON

SERVICE PIN

Figure 7 - Network Communication Electrical Connection

38

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

AAON AIRFLOW

SIGNAL PROCESSOR

CONNECT ONLY ONE END OF SHIELD

WIRE TO EARTH GROUND AS SHOWN

SET TERMINATOR SWITCH

ON IF REQUIRED

NETWORK

COMMUNICATIONS

NETWORK

CONNECT SHIELD

WIRES TOGETHER

CONNECT SHIELD

WIRES TOGETHER

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not

Requiring Common Signal Grounds

Note If using two conductor communication wire use the shield wire to connect all device signal grounds together as shown in the figure below If using three conductor communication wire use the 3rd conductor to connect all device signal grounds together and connect one side of the shield to earth ground

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

SIGNAL

GROUND

8

J2

SIGNAL

GROUND

8

J28

J2

USE SHIELD WIRE OR 3RD CONDUCTOR TO

CONNECT DEVICE SIGNAL GROUND TO

NETWORK SIGNAL GROUND

SET TERMINATOR SWITCH

ON IF REQUIRED

AAON AIRFLOW

SIGNAL PROCESSOR

NETWORK

COMMUNICATIONS

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

SIGNAL

GROUND

SIGNAL

GROUND

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds

39

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location

COMMUNICATION BOARD ID

BOARD SERIAL NO

40

Parameter Configuration 4112

If BACnet or Modbus communication is ordered the associated settings will need to be

configured with the exception of Modbus communication with WattMaster Controls which has

been configured at the factory To set the parameters refer to the following procedure below

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 41121

through 41124 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

41121 MAC Address (BACnet Communication Option)

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network Each AAON Airflow Signal

Processor must have a unique MAC Address assigned ranging from 2 to 127

Tech Config

Password 1000

4PT Flow Corr MAC Address

MAC Address (Range = 02 to 254)

Instance Number

Modbus ID (002)

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 25: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

25

4874 Fixed Value

The Fixed Value Menu allows the user to enter a temperature value for the flow calculations

This value will not be displayed on the LCD screen

Field Setup

Menu

Flow Correction Temperature Units Fixed Value

AutoZero Temperature Values (˚F)

Temp Comp Temperature Input

Display Filter Fixed Value (+068)

Display Filter 488

The Display Filter Menu allows the user to adjust the Display Filter rolling average algorithm by

setting the Sample Interval Time value in seconds and the number of rolling average Sample

Counts The adjustment range of the Sample Interval Time is 010 to 655 seconds in 010

increments The Sample Count range is 0 to 150 Sample Counts The Display Filter is

independent of the Process Output Filter Value (See Section 489)

Field Setup

Menu

Flow Correction Sample Interval Time

AutoZero (005)sec

Temp Comp (0-150) Sample Count

Display Filter (010)

Process Output Filter 489

The Process Output Filter Menu allows the user to adjust the Process Output Filters rolling

average algorithm by setting the Sample Interval Time value in seconds and the number of

rolling average Sample Counts The adjustment range of the Sample Interval Time is 010 to

655 seconds in 010 increments The Sample Count range is 0 to 150 Sample Counts The

Process Output Filter is independent of the Display Filter Value (See Section 488)

Field Setup

Menu

Output Filter Sample Interval Time

Alarm Options (005)sec

Factory Defaults (0-150) Sample Count

(010)

26

HighLow Alarm Option 4810

The following menus for configuration of HighLow Alarms are only available if the HighLow

Alarm option is purchased

48101 Alarm Status

The Alarm Status allows the user to independently turn each alarm ON or OFF

Field Setup

Menu

Output Filter Alarm Status Low Alarm

Alarm Options Alarm Value (On)

Factory Defaults Alarm Delay High Alarm

(On)

48102 Alarm Values

The Alarm Value Menu allows the user to enter the Low or the High flow alarm value Alarm

values will be displayed in the same engineering units selected in the Eng Units Menu (see

Section 483)

- High Alarm Function The High Alarm activates if the flow exceeds the High Alarm

value and resets when the flow drops below the High Alarm Value

- Low Alarm Function The Low Alarm activates if the flow drops below the Low

Alarm Value and resets when the flow exceeds the Low Alarm Value

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Value

Alarm Options Alarm Value (000000)

Factory Defaults Alarm Delay Hi Alarm Value

(100000)

48103 Alarm Delay

The Alarm Delay Menu allows the user to enter an alarm delay of 0 to 999 seconds before an

alarm will be activated The alarm will be reset without a delay

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Delay

Alarm Options Alarm Value (000)Seconds

Factory Defaults Alarm Delay Hi Alarm Delay

(000)Seconds

27

Factory Defaults 4811

If parameter configuration changes have been made incorrectly to the AAON Airflow Signal

Processor all device settings can be restored to the original AAON factory settings by selecting

YES and pressing Enter in both the Set To Factory Defaults Menu and the Verify Set To Factory

Defaults Menu (see Table 7 below for a list of Saved Settings)

Field Setup

Menu

Output Filter Set To Verify Set To

Alarm Options Factory Defaults Factory Defaults

Factory Defaults

(No) (No)

Table 7 - Factory Defaults

Item Saved Setting Item Saved Setting

1 All Factory Calibration Points (12) 14 MAC Address

2 Area Factor 15 Instance Number

3 Operating Range 16 Engineering Units

4 4 Pt Flow Correction 17 Display Filter Values

5 Altitude 18 Output Filter

6 K-Factor 19 DP Display Format

7 Lockdown amp Delay Values 20 Output Calibration

8 Flow Correction 21 AutoZero Status

9 Flow Coefficient 22 AutoZero Interval

10 Min amp Max Temp Range Values 23 Temp Units

11 Alarm Status 24 Temp Input

12 Alarm Values 25 Temp Fixed Value

13 Alarm Delay 26 Baud Rate

28

49 TECH CONFIGURATION MENUS

To set parameters under the Tech Configuration Menu refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 491

through 4911 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

Area Factor 491

To convert the differential pressure signal from the AAON Airflow Station to a flow value the

Area Factor associated with the AAON Airflow Station has been preprogramed by the factory

If the Area Factor needs to be checked or reconfigured the correct Area Factor for the AAON

Airflow Station can be found on the AAON Airflow Station product label installed in the air

handling unit

Tech Config

Password 1000

Area Factor Area Factor

Min Calibration (FT2)

Span Calibration

Altitude (001000)

29

If the Area Factor is reconfigured and the new Area Factor causes the existing Operating Range

Value to be outside the new calculated Minimum or Maximum Full Scale Value the below

Warning Message will appear and the Operating Range will be reset to the new Maximum Full

Scale Value by pressing Enter The display will automatically jump to the Operating Range

Menu allowing the user to enter a new Operating Range Value This can be accomplished by

performing the steps under Section 481 See Area Factor Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Area Factor

(FT )

(001000)

Area Factor

(FT )

Accepted

(001200)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Area

Factor and pressing

the Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Area Factor Example-

2

2

30

Minimum Calibration 492

The Minimum Calibration Menu allows a user to perform a minimum transducer calibration

This value will be placed in a different memory location and used until a Return to Factory

Defaults is selected (see Section 4811)

(Caution Before performing a minimum calibration disconnect the Total (High) and Static

(Low) Pressure connections perform a minimum calibration and then reconnect the Total

and Static Pressure connections)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00000) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Span Calibration 493

The Span Calibration Menu allows the user to perform a span transducer calibration to eliminate

any possible transducer drift This value will be placed in a different memory location than the

Factory Span memory location and used until a Return to Factory Defaults is selected (see

Section 4811)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00570) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Altitude 494

The Altitude Menu allows the user to enter the specific altitude for the job for the density

calculations the job specific site Altitude has been preprogramed by the factory

Tech Config

Password 1000

Area Factor Altitude

Min Calibration

Span Calibration (0000)Ft

Altitude

31

If the Altitude is changed from the factory setting and the new Altitude causes the existing

Operating Range Value to be outside the new calculated Minimum or Maximum Full Scale

Value the below Warning Message will appear and the Operating Range will be reset to the new

Maximum Full Scale Value by pressing Enter The display will automatically jump to the

Operating Range Menu allowing the user to enter a new Operating Range Value This can be

accomplished by performing the steps under Section 481 See Altitude Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Altitude

(0000)Ft

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Altitude

and pressing the Enter

button will calculate

new Min amp Max Op

Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Altitude Example-

Altitude

Accepted

(0100)Ft

32

Process Output Calibration 495

4951 Minimum Calibration

The Minimum Calibration Menu allows the user to make output zero adjustments Monitor the

output and with each Up or Down key depression the output will increase or decrease by

001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

4952 Span Calibration

The Span Calibration Menu allows the user to make output span adjustments Span adjustments

require a low pressure air source adjusted to the Full Scale Value shown on the side label

Monitor the output and with each Up or Down button depression the output will increase or

decrease by 001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

Probe Coefficient 496

The Probe Correction Coefficient Menu allows the user to modify the formula constant of

109670 used for non-amplified Pitot-type flow sensors

Tech Config

Password 1000

Output Calibration Correction Coeff

Correction Coeff Probe

4PT Flow Corr (109670)

MAC Address (00109670)

33

Four Point Flow Correction 497

The Four Point Flow Correction Menu allows the user to make corrections to the display and

output signal at 20 increments between 20 and 80 of the Operating Range Value entered

The Displayed Value is a fixed value determined by the percentage of Operating Range The

Measured Value is the value determined by an independent balancerrsquos reading

Tech Config

Password 1000

Output Calibration 80000 CFM Displayed Value

Correction Coeff 60000 CFM 80000

4PT Flow Corr 40000 CFM Measured Value

MAC Address 20000 CFM 79500

80000 CFM Displayed Value

60000 CFM 60000

40000 CFM Measured Value

20000 CFM 60500

80000 CFM Displayed Value

60000 CFM 40000

40000 CFM Measured Value

20000 CFM 40100

80000 CFM Displayed Value

60000 CFM 20000

40000 CFM Measured Value

20000 CFM 19500

MAC Address (BACnet Communication Option) 498

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network The default is 002 For

additional information refer to Section 411

Tech Config

Password 1000

Output Calibration MAC Address

Correction Coeff (Range = 02 to 254)

4PT Flow Corr

MAC Address (002)

34

Instance Number (BACnet Communication Option) 499

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The default is 1002 For

additional information refer to Section 411

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (Default = 1002)

Instance Number

Modbus ID (01002)

Modbus ID (Modbus Communication Option) 4910

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network The default is 002 For

communication with WattMaster Controls the Modbus ID has been set by the factory to 009 for

outside airflow applications For additional information refer to the Section 411

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

Baud Rate (BACnet amp Modbus Communication Options) 4911

The Baud Rate Menu allows the user to set a unique network baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate Modbus communications supports

96 192 384 576 and 1152 Kbps baud rate The default is 384 Kbps For communication

with WattMaster Controls the Baud Rate has been set by the factory to 96 Kbps For additional

information refer to Section 411

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

35

410 WARNING MESSAGES

Input Pressure Overrange Message 4101

If the input pressure exceeds the entered Operating Range Value the following message will

appear on the display It will alternate between the process display and the error message until

the input falls below the Operating Range Value

- Caution -

Input Beyond

Operating Range

Selected

Transducer Calibration Message 4102

If during a transducer zero or span calibration process the transducer output pressure value

measured exceeds plusmn20 of the expected value the following message will appear on the display

Once the Enter button is pressed the display returns to the previous calibration menu

Value entered is

Outside Factory

set limits

(Press Enter)

Operating Range Message 4103

If the new values entered for Temperature Compensation Area Factor or Altitude (see Sections

487 491 and 494) causes the Operating Range Value to exceed the new calculated

Maximum Full Scale Value the following message will appear on the display

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

New Operating Range Message 4104

If a user enters a new Operating Range Value the following message will appear on the display

notifying the user that if any 4 PT Flow Correction Values (see Section 497) were previously

entered they will be reset The message allows the user to confirm that the Operating Range

change should be made To complete the Operating Range change the user must use the

UPDown buttons to change the NO to a YES and press the ENTER button

Value will

Reset 4PT

Flow Correction

Values

Make the Change

(NO)

(Press Enter)

36

411 NETWORK COMMUNICATION

The AAON Airflow Signal Processor can be ordered with BACnet Modbus or LonWorks

Communication For BACnet Communication the AAON Airflow Signal Processors utilize

MSTP (Master SlaveToken Passing) BACnet type protocol BACnet is implemented using

EIA-485 signaling standards through a shielded twisted pair wire operating at a baud rate of 96

Kbps to 768 Kbps Each device has a unique MAC Address ranging from 2 to 127 Refer to

Section 4113 for BACnet Protocol Implementation Conformance Statements (PICS) For

Modbus Communication the AAON Airflow Signal Processors utilize the Modbus ndash RTU Slave

protocol using EIA-485 signaling standards through a shielded twisted pair wire operating at a

baud rate of 96 Kbps to 1152 Kbps Each device has a unique Modbus ID ranging from 1 to

254 Refer to Section 4114 for Modbus software configuration parameters For LonWorks

Communication each AAON Airflow Signal Processor has a unique Neuron Chip ID which is

loaded on the network by pressing a service switch located on the main board (see Section

4111 Figure 7) The LonWorks network utilizes a shielded twisted pair wire operating at a

fixed baud rate of 78 Kbps Refer to Section 4115 for LonWorks network variables

Sections 4111 and 4112 contain procedures for electrical connection of the AAON Airflow

Signal Processor to the network and for configuring the required communication parameters

Electrical Connection 4111

The following procedure outlines the steps for installing the interface wiring for network

communication Network wire should be low capacitance shielded 22 or 24 AWG twisted pair

with PVC jacket such as Belden Part numbers 9841 3105A or equivalent

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Verify that the Power Switch (S3) is in the OFF position and install the interface

wiring for Pins 9 and 10 as shown in Figure 7 If multiple AAON Airflow Signal

Processors will be connected to the same network see Figure 8 for connecting

multiple devices For network systems that require all devices to have a common

signal ground refer to Figure 9 for electrical connection The J2 electrical

connector has a removable terminal block for ease of installing the interface

wiring

Step 4 For proper operation of BACnet and Modbus communication networks the

device that is electrically installed at the end of the network may require the

Terminator Switch be moved to the ON position to prevent line and data

reflection If Terminator is required it must be applied to both physical ends of

the network All other devices should have the Terminator Switch in the OFF

position The communication board is located on the back side of the main

AAON Airflow Signal Processor board See Figure 10 below for Terminator

Switch location on the communication board

Step 5 For LonWorks Communication refer to Figure 7 for the location of the Lon

Service Pin

37

Step 6 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 7 Configure the required parameters as outlined in Section 4112

Step 8 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

RP1

S3

NETWORK

COMMUNICATION+

-

LON

SERVICE PIN

Figure 7 - Network Communication Electrical Connection

38

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

AAON AIRFLOW

SIGNAL PROCESSOR

CONNECT ONLY ONE END OF SHIELD

WIRE TO EARTH GROUND AS SHOWN

SET TERMINATOR SWITCH

ON IF REQUIRED

NETWORK

COMMUNICATIONS

NETWORK

CONNECT SHIELD

WIRES TOGETHER

CONNECT SHIELD

WIRES TOGETHER

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not

Requiring Common Signal Grounds

Note If using two conductor communication wire use the shield wire to connect all device signal grounds together as shown in the figure below If using three conductor communication wire use the 3rd conductor to connect all device signal grounds together and connect one side of the shield to earth ground

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

SIGNAL

GROUND

8

J2

SIGNAL

GROUND

8

J28

J2

USE SHIELD WIRE OR 3RD CONDUCTOR TO

CONNECT DEVICE SIGNAL GROUND TO

NETWORK SIGNAL GROUND

SET TERMINATOR SWITCH

ON IF REQUIRED

AAON AIRFLOW

SIGNAL PROCESSOR

NETWORK

COMMUNICATIONS

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

SIGNAL

GROUND

SIGNAL

GROUND

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds

39

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location

COMMUNICATION BOARD ID

BOARD SERIAL NO

40

Parameter Configuration 4112

If BACnet or Modbus communication is ordered the associated settings will need to be

configured with the exception of Modbus communication with WattMaster Controls which has

been configured at the factory To set the parameters refer to the following procedure below

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 41121

through 41124 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

41121 MAC Address (BACnet Communication Option)

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network Each AAON Airflow Signal

Processor must have a unique MAC Address assigned ranging from 2 to 127

Tech Config

Password 1000

4PT Flow Corr MAC Address

MAC Address (Range = 02 to 254)

Instance Number

Modbus ID (002)

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 26: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

26

HighLow Alarm Option 4810

The following menus for configuration of HighLow Alarms are only available if the HighLow

Alarm option is purchased

48101 Alarm Status

The Alarm Status allows the user to independently turn each alarm ON or OFF

Field Setup

Menu

Output Filter Alarm Status Low Alarm

Alarm Options Alarm Value (On)

Factory Defaults Alarm Delay High Alarm

(On)

48102 Alarm Values

The Alarm Value Menu allows the user to enter the Low or the High flow alarm value Alarm

values will be displayed in the same engineering units selected in the Eng Units Menu (see

Section 483)

- High Alarm Function The High Alarm activates if the flow exceeds the High Alarm

value and resets when the flow drops below the High Alarm Value

- Low Alarm Function The Low Alarm activates if the flow drops below the Low

Alarm Value and resets when the flow exceeds the Low Alarm Value

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Value

Alarm Options Alarm Value (000000)

Factory Defaults Alarm Delay Hi Alarm Value

(100000)

48103 Alarm Delay

The Alarm Delay Menu allows the user to enter an alarm delay of 0 to 999 seconds before an

alarm will be activated The alarm will be reset without a delay

Field Setup

Menu

Output Filter Alarm Status Lo Alarm Delay

Alarm Options Alarm Value (000)Seconds

Factory Defaults Alarm Delay Hi Alarm Delay

(000)Seconds

27

Factory Defaults 4811

If parameter configuration changes have been made incorrectly to the AAON Airflow Signal

Processor all device settings can be restored to the original AAON factory settings by selecting

YES and pressing Enter in both the Set To Factory Defaults Menu and the Verify Set To Factory

Defaults Menu (see Table 7 below for a list of Saved Settings)

Field Setup

Menu

Output Filter Set To Verify Set To

Alarm Options Factory Defaults Factory Defaults

Factory Defaults

(No) (No)

Table 7 - Factory Defaults

Item Saved Setting Item Saved Setting

1 All Factory Calibration Points (12) 14 MAC Address

2 Area Factor 15 Instance Number

3 Operating Range 16 Engineering Units

4 4 Pt Flow Correction 17 Display Filter Values

5 Altitude 18 Output Filter

6 K-Factor 19 DP Display Format

7 Lockdown amp Delay Values 20 Output Calibration

8 Flow Correction 21 AutoZero Status

9 Flow Coefficient 22 AutoZero Interval

10 Min amp Max Temp Range Values 23 Temp Units

11 Alarm Status 24 Temp Input

12 Alarm Values 25 Temp Fixed Value

13 Alarm Delay 26 Baud Rate

28

49 TECH CONFIGURATION MENUS

To set parameters under the Tech Configuration Menu refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 491

through 4911 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

Area Factor 491

To convert the differential pressure signal from the AAON Airflow Station to a flow value the

Area Factor associated with the AAON Airflow Station has been preprogramed by the factory

If the Area Factor needs to be checked or reconfigured the correct Area Factor for the AAON

Airflow Station can be found on the AAON Airflow Station product label installed in the air

handling unit

Tech Config

Password 1000

Area Factor Area Factor

Min Calibration (FT2)

Span Calibration

Altitude (001000)

29

If the Area Factor is reconfigured and the new Area Factor causes the existing Operating Range

Value to be outside the new calculated Minimum or Maximum Full Scale Value the below

Warning Message will appear and the Operating Range will be reset to the new Maximum Full

Scale Value by pressing Enter The display will automatically jump to the Operating Range

Menu allowing the user to enter a new Operating Range Value This can be accomplished by

performing the steps under Section 481 See Area Factor Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Area Factor

(FT )

(001000)

Area Factor

(FT )

Accepted

(001200)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Area

Factor and pressing

the Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Area Factor Example-

2

2

30

Minimum Calibration 492

The Minimum Calibration Menu allows a user to perform a minimum transducer calibration

This value will be placed in a different memory location and used until a Return to Factory

Defaults is selected (see Section 4811)

(Caution Before performing a minimum calibration disconnect the Total (High) and Static

(Low) Pressure connections perform a minimum calibration and then reconnect the Total

and Static Pressure connections)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00000) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Span Calibration 493

The Span Calibration Menu allows the user to perform a span transducer calibration to eliminate

any possible transducer drift This value will be placed in a different memory location than the

Factory Span memory location and used until a Return to Factory Defaults is selected (see

Section 4811)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00570) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Altitude 494

The Altitude Menu allows the user to enter the specific altitude for the job for the density

calculations the job specific site Altitude has been preprogramed by the factory

Tech Config

Password 1000

Area Factor Altitude

Min Calibration

Span Calibration (0000)Ft

Altitude

31

If the Altitude is changed from the factory setting and the new Altitude causes the existing

Operating Range Value to be outside the new calculated Minimum or Maximum Full Scale

Value the below Warning Message will appear and the Operating Range will be reset to the new

Maximum Full Scale Value by pressing Enter The display will automatically jump to the

Operating Range Menu allowing the user to enter a new Operating Range Value This can be

accomplished by performing the steps under Section 481 See Altitude Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Altitude

(0000)Ft

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Altitude

and pressing the Enter

button will calculate

new Min amp Max Op

Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Altitude Example-

Altitude

Accepted

(0100)Ft

32

Process Output Calibration 495

4951 Minimum Calibration

The Minimum Calibration Menu allows the user to make output zero adjustments Monitor the

output and with each Up or Down key depression the output will increase or decrease by

001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

4952 Span Calibration

The Span Calibration Menu allows the user to make output span adjustments Span adjustments

require a low pressure air source adjusted to the Full Scale Value shown on the side label

Monitor the output and with each Up or Down button depression the output will increase or

decrease by 001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

Probe Coefficient 496

The Probe Correction Coefficient Menu allows the user to modify the formula constant of

109670 used for non-amplified Pitot-type flow sensors

Tech Config

Password 1000

Output Calibration Correction Coeff

Correction Coeff Probe

4PT Flow Corr (109670)

MAC Address (00109670)

33

Four Point Flow Correction 497

The Four Point Flow Correction Menu allows the user to make corrections to the display and

output signal at 20 increments between 20 and 80 of the Operating Range Value entered

The Displayed Value is a fixed value determined by the percentage of Operating Range The

Measured Value is the value determined by an independent balancerrsquos reading

Tech Config

Password 1000

Output Calibration 80000 CFM Displayed Value

Correction Coeff 60000 CFM 80000

4PT Flow Corr 40000 CFM Measured Value

MAC Address 20000 CFM 79500

80000 CFM Displayed Value

60000 CFM 60000

40000 CFM Measured Value

20000 CFM 60500

80000 CFM Displayed Value

60000 CFM 40000

40000 CFM Measured Value

20000 CFM 40100

80000 CFM Displayed Value

60000 CFM 20000

40000 CFM Measured Value

20000 CFM 19500

MAC Address (BACnet Communication Option) 498

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network The default is 002 For

additional information refer to Section 411

Tech Config

Password 1000

Output Calibration MAC Address

Correction Coeff (Range = 02 to 254)

4PT Flow Corr

MAC Address (002)

34

Instance Number (BACnet Communication Option) 499

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The default is 1002 For

additional information refer to Section 411

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (Default = 1002)

Instance Number

Modbus ID (01002)

Modbus ID (Modbus Communication Option) 4910

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network The default is 002 For

communication with WattMaster Controls the Modbus ID has been set by the factory to 009 for

outside airflow applications For additional information refer to the Section 411

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

Baud Rate (BACnet amp Modbus Communication Options) 4911

The Baud Rate Menu allows the user to set a unique network baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate Modbus communications supports

96 192 384 576 and 1152 Kbps baud rate The default is 384 Kbps For communication

with WattMaster Controls the Baud Rate has been set by the factory to 96 Kbps For additional

information refer to Section 411

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

35

410 WARNING MESSAGES

Input Pressure Overrange Message 4101

If the input pressure exceeds the entered Operating Range Value the following message will

appear on the display It will alternate between the process display and the error message until

the input falls below the Operating Range Value

- Caution -

Input Beyond

Operating Range

Selected

Transducer Calibration Message 4102

If during a transducer zero or span calibration process the transducer output pressure value

measured exceeds plusmn20 of the expected value the following message will appear on the display

Once the Enter button is pressed the display returns to the previous calibration menu

Value entered is

Outside Factory

set limits

(Press Enter)

Operating Range Message 4103

If the new values entered for Temperature Compensation Area Factor or Altitude (see Sections

487 491 and 494) causes the Operating Range Value to exceed the new calculated

Maximum Full Scale Value the following message will appear on the display

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

New Operating Range Message 4104

If a user enters a new Operating Range Value the following message will appear on the display

notifying the user that if any 4 PT Flow Correction Values (see Section 497) were previously

entered they will be reset The message allows the user to confirm that the Operating Range

change should be made To complete the Operating Range change the user must use the

UPDown buttons to change the NO to a YES and press the ENTER button

Value will

Reset 4PT

Flow Correction

Values

Make the Change

(NO)

(Press Enter)

36

411 NETWORK COMMUNICATION

The AAON Airflow Signal Processor can be ordered with BACnet Modbus or LonWorks

Communication For BACnet Communication the AAON Airflow Signal Processors utilize

MSTP (Master SlaveToken Passing) BACnet type protocol BACnet is implemented using

EIA-485 signaling standards through a shielded twisted pair wire operating at a baud rate of 96

Kbps to 768 Kbps Each device has a unique MAC Address ranging from 2 to 127 Refer to

Section 4113 for BACnet Protocol Implementation Conformance Statements (PICS) For

Modbus Communication the AAON Airflow Signal Processors utilize the Modbus ndash RTU Slave

protocol using EIA-485 signaling standards through a shielded twisted pair wire operating at a

baud rate of 96 Kbps to 1152 Kbps Each device has a unique Modbus ID ranging from 1 to

254 Refer to Section 4114 for Modbus software configuration parameters For LonWorks

Communication each AAON Airflow Signal Processor has a unique Neuron Chip ID which is

loaded on the network by pressing a service switch located on the main board (see Section

4111 Figure 7) The LonWorks network utilizes a shielded twisted pair wire operating at a

fixed baud rate of 78 Kbps Refer to Section 4115 for LonWorks network variables

Sections 4111 and 4112 contain procedures for electrical connection of the AAON Airflow

Signal Processor to the network and for configuring the required communication parameters

Electrical Connection 4111

The following procedure outlines the steps for installing the interface wiring for network

communication Network wire should be low capacitance shielded 22 or 24 AWG twisted pair

with PVC jacket such as Belden Part numbers 9841 3105A or equivalent

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Verify that the Power Switch (S3) is in the OFF position and install the interface

wiring for Pins 9 and 10 as shown in Figure 7 If multiple AAON Airflow Signal

Processors will be connected to the same network see Figure 8 for connecting

multiple devices For network systems that require all devices to have a common

signal ground refer to Figure 9 for electrical connection The J2 electrical

connector has a removable terminal block for ease of installing the interface

wiring

Step 4 For proper operation of BACnet and Modbus communication networks the

device that is electrically installed at the end of the network may require the

Terminator Switch be moved to the ON position to prevent line and data

reflection If Terminator is required it must be applied to both physical ends of

the network All other devices should have the Terminator Switch in the OFF

position The communication board is located on the back side of the main

AAON Airflow Signal Processor board See Figure 10 below for Terminator

Switch location on the communication board

Step 5 For LonWorks Communication refer to Figure 7 for the location of the Lon

Service Pin

37

Step 6 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 7 Configure the required parameters as outlined in Section 4112

Step 8 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

RP1

S3

NETWORK

COMMUNICATION+

-

LON

SERVICE PIN

Figure 7 - Network Communication Electrical Connection

38

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

AAON AIRFLOW

SIGNAL PROCESSOR

CONNECT ONLY ONE END OF SHIELD

WIRE TO EARTH GROUND AS SHOWN

SET TERMINATOR SWITCH

ON IF REQUIRED

NETWORK

COMMUNICATIONS

NETWORK

CONNECT SHIELD

WIRES TOGETHER

CONNECT SHIELD

WIRES TOGETHER

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not

Requiring Common Signal Grounds

Note If using two conductor communication wire use the shield wire to connect all device signal grounds together as shown in the figure below If using three conductor communication wire use the 3rd conductor to connect all device signal grounds together and connect one side of the shield to earth ground

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

SIGNAL

GROUND

8

J2

SIGNAL

GROUND

8

J28

J2

USE SHIELD WIRE OR 3RD CONDUCTOR TO

CONNECT DEVICE SIGNAL GROUND TO

NETWORK SIGNAL GROUND

SET TERMINATOR SWITCH

ON IF REQUIRED

AAON AIRFLOW

SIGNAL PROCESSOR

NETWORK

COMMUNICATIONS

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

SIGNAL

GROUND

SIGNAL

GROUND

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds

39

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location

COMMUNICATION BOARD ID

BOARD SERIAL NO

40

Parameter Configuration 4112

If BACnet or Modbus communication is ordered the associated settings will need to be

configured with the exception of Modbus communication with WattMaster Controls which has

been configured at the factory To set the parameters refer to the following procedure below

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 41121

through 41124 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

41121 MAC Address (BACnet Communication Option)

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network Each AAON Airflow Signal

Processor must have a unique MAC Address assigned ranging from 2 to 127

Tech Config

Password 1000

4PT Flow Corr MAC Address

MAC Address (Range = 02 to 254)

Instance Number

Modbus ID (002)

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 27: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

27

Factory Defaults 4811

If parameter configuration changes have been made incorrectly to the AAON Airflow Signal

Processor all device settings can be restored to the original AAON factory settings by selecting

YES and pressing Enter in both the Set To Factory Defaults Menu and the Verify Set To Factory

Defaults Menu (see Table 7 below for a list of Saved Settings)

Field Setup

Menu

Output Filter Set To Verify Set To

Alarm Options Factory Defaults Factory Defaults

Factory Defaults

(No) (No)

Table 7 - Factory Defaults

Item Saved Setting Item Saved Setting

1 All Factory Calibration Points (12) 14 MAC Address

2 Area Factor 15 Instance Number

3 Operating Range 16 Engineering Units

4 4 Pt Flow Correction 17 Display Filter Values

5 Altitude 18 Output Filter

6 K-Factor 19 DP Display Format

7 Lockdown amp Delay Values 20 Output Calibration

8 Flow Correction 21 AutoZero Status

9 Flow Coefficient 22 AutoZero Interval

10 Min amp Max Temp Range Values 23 Temp Units

11 Alarm Status 24 Temp Input

12 Alarm Values 25 Temp Fixed Value

13 Alarm Delay 26 Baud Rate

28

49 TECH CONFIGURATION MENUS

To set parameters under the Tech Configuration Menu refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 491

through 4911 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

Area Factor 491

To convert the differential pressure signal from the AAON Airflow Station to a flow value the

Area Factor associated with the AAON Airflow Station has been preprogramed by the factory

If the Area Factor needs to be checked or reconfigured the correct Area Factor for the AAON

Airflow Station can be found on the AAON Airflow Station product label installed in the air

handling unit

Tech Config

Password 1000

Area Factor Area Factor

Min Calibration (FT2)

Span Calibration

Altitude (001000)

29

If the Area Factor is reconfigured and the new Area Factor causes the existing Operating Range

Value to be outside the new calculated Minimum or Maximum Full Scale Value the below

Warning Message will appear and the Operating Range will be reset to the new Maximum Full

Scale Value by pressing Enter The display will automatically jump to the Operating Range

Menu allowing the user to enter a new Operating Range Value This can be accomplished by

performing the steps under Section 481 See Area Factor Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Area Factor

(FT )

(001000)

Area Factor

(FT )

Accepted

(001200)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Area

Factor and pressing

the Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Area Factor Example-

2

2

30

Minimum Calibration 492

The Minimum Calibration Menu allows a user to perform a minimum transducer calibration

This value will be placed in a different memory location and used until a Return to Factory

Defaults is selected (see Section 4811)

(Caution Before performing a minimum calibration disconnect the Total (High) and Static

(Low) Pressure connections perform a minimum calibration and then reconnect the Total

and Static Pressure connections)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00000) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Span Calibration 493

The Span Calibration Menu allows the user to perform a span transducer calibration to eliminate

any possible transducer drift This value will be placed in a different memory location than the

Factory Span memory location and used until a Return to Factory Defaults is selected (see

Section 4811)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00570) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Altitude 494

The Altitude Menu allows the user to enter the specific altitude for the job for the density

calculations the job specific site Altitude has been preprogramed by the factory

Tech Config

Password 1000

Area Factor Altitude

Min Calibration

Span Calibration (0000)Ft

Altitude

31

If the Altitude is changed from the factory setting and the new Altitude causes the existing

Operating Range Value to be outside the new calculated Minimum or Maximum Full Scale

Value the below Warning Message will appear and the Operating Range will be reset to the new

Maximum Full Scale Value by pressing Enter The display will automatically jump to the

Operating Range Menu allowing the user to enter a new Operating Range Value This can be

accomplished by performing the steps under Section 481 See Altitude Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Altitude

(0000)Ft

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Altitude

and pressing the Enter

button will calculate

new Min amp Max Op

Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Altitude Example-

Altitude

Accepted

(0100)Ft

32

Process Output Calibration 495

4951 Minimum Calibration

The Minimum Calibration Menu allows the user to make output zero adjustments Monitor the

output and with each Up or Down key depression the output will increase or decrease by

001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

4952 Span Calibration

The Span Calibration Menu allows the user to make output span adjustments Span adjustments

require a low pressure air source adjusted to the Full Scale Value shown on the side label

Monitor the output and with each Up or Down button depression the output will increase or

decrease by 001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

Probe Coefficient 496

The Probe Correction Coefficient Menu allows the user to modify the formula constant of

109670 used for non-amplified Pitot-type flow sensors

Tech Config

Password 1000

Output Calibration Correction Coeff

Correction Coeff Probe

4PT Flow Corr (109670)

MAC Address (00109670)

33

Four Point Flow Correction 497

The Four Point Flow Correction Menu allows the user to make corrections to the display and

output signal at 20 increments between 20 and 80 of the Operating Range Value entered

The Displayed Value is a fixed value determined by the percentage of Operating Range The

Measured Value is the value determined by an independent balancerrsquos reading

Tech Config

Password 1000

Output Calibration 80000 CFM Displayed Value

Correction Coeff 60000 CFM 80000

4PT Flow Corr 40000 CFM Measured Value

MAC Address 20000 CFM 79500

80000 CFM Displayed Value

60000 CFM 60000

40000 CFM Measured Value

20000 CFM 60500

80000 CFM Displayed Value

60000 CFM 40000

40000 CFM Measured Value

20000 CFM 40100

80000 CFM Displayed Value

60000 CFM 20000

40000 CFM Measured Value

20000 CFM 19500

MAC Address (BACnet Communication Option) 498

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network The default is 002 For

additional information refer to Section 411

Tech Config

Password 1000

Output Calibration MAC Address

Correction Coeff (Range = 02 to 254)

4PT Flow Corr

MAC Address (002)

34

Instance Number (BACnet Communication Option) 499

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The default is 1002 For

additional information refer to Section 411

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (Default = 1002)

Instance Number

Modbus ID (01002)

Modbus ID (Modbus Communication Option) 4910

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network The default is 002 For

communication with WattMaster Controls the Modbus ID has been set by the factory to 009 for

outside airflow applications For additional information refer to the Section 411

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

Baud Rate (BACnet amp Modbus Communication Options) 4911

The Baud Rate Menu allows the user to set a unique network baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate Modbus communications supports

96 192 384 576 and 1152 Kbps baud rate The default is 384 Kbps For communication

with WattMaster Controls the Baud Rate has been set by the factory to 96 Kbps For additional

information refer to Section 411

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

35

410 WARNING MESSAGES

Input Pressure Overrange Message 4101

If the input pressure exceeds the entered Operating Range Value the following message will

appear on the display It will alternate between the process display and the error message until

the input falls below the Operating Range Value

- Caution -

Input Beyond

Operating Range

Selected

Transducer Calibration Message 4102

If during a transducer zero or span calibration process the transducer output pressure value

measured exceeds plusmn20 of the expected value the following message will appear on the display

Once the Enter button is pressed the display returns to the previous calibration menu

Value entered is

Outside Factory

set limits

(Press Enter)

Operating Range Message 4103

If the new values entered for Temperature Compensation Area Factor or Altitude (see Sections

487 491 and 494) causes the Operating Range Value to exceed the new calculated

Maximum Full Scale Value the following message will appear on the display

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

New Operating Range Message 4104

If a user enters a new Operating Range Value the following message will appear on the display

notifying the user that if any 4 PT Flow Correction Values (see Section 497) were previously

entered they will be reset The message allows the user to confirm that the Operating Range

change should be made To complete the Operating Range change the user must use the

UPDown buttons to change the NO to a YES and press the ENTER button

Value will

Reset 4PT

Flow Correction

Values

Make the Change

(NO)

(Press Enter)

36

411 NETWORK COMMUNICATION

The AAON Airflow Signal Processor can be ordered with BACnet Modbus or LonWorks

Communication For BACnet Communication the AAON Airflow Signal Processors utilize

MSTP (Master SlaveToken Passing) BACnet type protocol BACnet is implemented using

EIA-485 signaling standards through a shielded twisted pair wire operating at a baud rate of 96

Kbps to 768 Kbps Each device has a unique MAC Address ranging from 2 to 127 Refer to

Section 4113 for BACnet Protocol Implementation Conformance Statements (PICS) For

Modbus Communication the AAON Airflow Signal Processors utilize the Modbus ndash RTU Slave

protocol using EIA-485 signaling standards through a shielded twisted pair wire operating at a

baud rate of 96 Kbps to 1152 Kbps Each device has a unique Modbus ID ranging from 1 to

254 Refer to Section 4114 for Modbus software configuration parameters For LonWorks

Communication each AAON Airflow Signal Processor has a unique Neuron Chip ID which is

loaded on the network by pressing a service switch located on the main board (see Section

4111 Figure 7) The LonWorks network utilizes a shielded twisted pair wire operating at a

fixed baud rate of 78 Kbps Refer to Section 4115 for LonWorks network variables

Sections 4111 and 4112 contain procedures for electrical connection of the AAON Airflow

Signal Processor to the network and for configuring the required communication parameters

Electrical Connection 4111

The following procedure outlines the steps for installing the interface wiring for network

communication Network wire should be low capacitance shielded 22 or 24 AWG twisted pair

with PVC jacket such as Belden Part numbers 9841 3105A or equivalent

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Verify that the Power Switch (S3) is in the OFF position and install the interface

wiring for Pins 9 and 10 as shown in Figure 7 If multiple AAON Airflow Signal

Processors will be connected to the same network see Figure 8 for connecting

multiple devices For network systems that require all devices to have a common

signal ground refer to Figure 9 for electrical connection The J2 electrical

connector has a removable terminal block for ease of installing the interface

wiring

Step 4 For proper operation of BACnet and Modbus communication networks the

device that is electrically installed at the end of the network may require the

Terminator Switch be moved to the ON position to prevent line and data

reflection If Terminator is required it must be applied to both physical ends of

the network All other devices should have the Terminator Switch in the OFF

position The communication board is located on the back side of the main

AAON Airflow Signal Processor board See Figure 10 below for Terminator

Switch location on the communication board

Step 5 For LonWorks Communication refer to Figure 7 for the location of the Lon

Service Pin

37

Step 6 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 7 Configure the required parameters as outlined in Section 4112

Step 8 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

RP1

S3

NETWORK

COMMUNICATION+

-

LON

SERVICE PIN

Figure 7 - Network Communication Electrical Connection

38

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

AAON AIRFLOW

SIGNAL PROCESSOR

CONNECT ONLY ONE END OF SHIELD

WIRE TO EARTH GROUND AS SHOWN

SET TERMINATOR SWITCH

ON IF REQUIRED

NETWORK

COMMUNICATIONS

NETWORK

CONNECT SHIELD

WIRES TOGETHER

CONNECT SHIELD

WIRES TOGETHER

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not

Requiring Common Signal Grounds

Note If using two conductor communication wire use the shield wire to connect all device signal grounds together as shown in the figure below If using three conductor communication wire use the 3rd conductor to connect all device signal grounds together and connect one side of the shield to earth ground

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

SIGNAL

GROUND

8

J2

SIGNAL

GROUND

8

J28

J2

USE SHIELD WIRE OR 3RD CONDUCTOR TO

CONNECT DEVICE SIGNAL GROUND TO

NETWORK SIGNAL GROUND

SET TERMINATOR SWITCH

ON IF REQUIRED

AAON AIRFLOW

SIGNAL PROCESSOR

NETWORK

COMMUNICATIONS

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

SIGNAL

GROUND

SIGNAL

GROUND

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds

39

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location

COMMUNICATION BOARD ID

BOARD SERIAL NO

40

Parameter Configuration 4112

If BACnet or Modbus communication is ordered the associated settings will need to be

configured with the exception of Modbus communication with WattMaster Controls which has

been configured at the factory To set the parameters refer to the following procedure below

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 41121

through 41124 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

41121 MAC Address (BACnet Communication Option)

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network Each AAON Airflow Signal

Processor must have a unique MAC Address assigned ranging from 2 to 127

Tech Config

Password 1000

4PT Flow Corr MAC Address

MAC Address (Range = 02 to 254)

Instance Number

Modbus ID (002)

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 28: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

28

49 TECH CONFIGURATION MENUS

To set parameters under the Tech Configuration Menu refer to the procedure below associated

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 491

through 4911 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

Area Factor 491

To convert the differential pressure signal from the AAON Airflow Station to a flow value the

Area Factor associated with the AAON Airflow Station has been preprogramed by the factory

If the Area Factor needs to be checked or reconfigured the correct Area Factor for the AAON

Airflow Station can be found on the AAON Airflow Station product label installed in the air

handling unit

Tech Config

Password 1000

Area Factor Area Factor

Min Calibration (FT2)

Span Calibration

Altitude (001000)

29

If the Area Factor is reconfigured and the new Area Factor causes the existing Operating Range

Value to be outside the new calculated Minimum or Maximum Full Scale Value the below

Warning Message will appear and the Operating Range will be reset to the new Maximum Full

Scale Value by pressing Enter The display will automatically jump to the Operating Range

Menu allowing the user to enter a new Operating Range Value This can be accomplished by

performing the steps under Section 481 See Area Factor Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Area Factor

(FT )

(001000)

Area Factor

(FT )

Accepted

(001200)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Area

Factor and pressing

the Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Area Factor Example-

2

2

30

Minimum Calibration 492

The Minimum Calibration Menu allows a user to perform a minimum transducer calibration

This value will be placed in a different memory location and used until a Return to Factory

Defaults is selected (see Section 4811)

(Caution Before performing a minimum calibration disconnect the Total (High) and Static

(Low) Pressure connections perform a minimum calibration and then reconnect the Total

and Static Pressure connections)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00000) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Span Calibration 493

The Span Calibration Menu allows the user to perform a span transducer calibration to eliminate

any possible transducer drift This value will be placed in a different memory location than the

Factory Span memory location and used until a Return to Factory Defaults is selected (see

Section 4811)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00570) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Altitude 494

The Altitude Menu allows the user to enter the specific altitude for the job for the density

calculations the job specific site Altitude has been preprogramed by the factory

Tech Config

Password 1000

Area Factor Altitude

Min Calibration

Span Calibration (0000)Ft

Altitude

31

If the Altitude is changed from the factory setting and the new Altitude causes the existing

Operating Range Value to be outside the new calculated Minimum or Maximum Full Scale

Value the below Warning Message will appear and the Operating Range will be reset to the new

Maximum Full Scale Value by pressing Enter The display will automatically jump to the

Operating Range Menu allowing the user to enter a new Operating Range Value This can be

accomplished by performing the steps under Section 481 See Altitude Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Altitude

(0000)Ft

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Altitude

and pressing the Enter

button will calculate

new Min amp Max Op

Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Altitude Example-

Altitude

Accepted

(0100)Ft

32

Process Output Calibration 495

4951 Minimum Calibration

The Minimum Calibration Menu allows the user to make output zero adjustments Monitor the

output and with each Up or Down key depression the output will increase or decrease by

001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

4952 Span Calibration

The Span Calibration Menu allows the user to make output span adjustments Span adjustments

require a low pressure air source adjusted to the Full Scale Value shown on the side label

Monitor the output and with each Up or Down button depression the output will increase or

decrease by 001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

Probe Coefficient 496

The Probe Correction Coefficient Menu allows the user to modify the formula constant of

109670 used for non-amplified Pitot-type flow sensors

Tech Config

Password 1000

Output Calibration Correction Coeff

Correction Coeff Probe

4PT Flow Corr (109670)

MAC Address (00109670)

33

Four Point Flow Correction 497

The Four Point Flow Correction Menu allows the user to make corrections to the display and

output signal at 20 increments between 20 and 80 of the Operating Range Value entered

The Displayed Value is a fixed value determined by the percentage of Operating Range The

Measured Value is the value determined by an independent balancerrsquos reading

Tech Config

Password 1000

Output Calibration 80000 CFM Displayed Value

Correction Coeff 60000 CFM 80000

4PT Flow Corr 40000 CFM Measured Value

MAC Address 20000 CFM 79500

80000 CFM Displayed Value

60000 CFM 60000

40000 CFM Measured Value

20000 CFM 60500

80000 CFM Displayed Value

60000 CFM 40000

40000 CFM Measured Value

20000 CFM 40100

80000 CFM Displayed Value

60000 CFM 20000

40000 CFM Measured Value

20000 CFM 19500

MAC Address (BACnet Communication Option) 498

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network The default is 002 For

additional information refer to Section 411

Tech Config

Password 1000

Output Calibration MAC Address

Correction Coeff (Range = 02 to 254)

4PT Flow Corr

MAC Address (002)

34

Instance Number (BACnet Communication Option) 499

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The default is 1002 For

additional information refer to Section 411

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (Default = 1002)

Instance Number

Modbus ID (01002)

Modbus ID (Modbus Communication Option) 4910

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network The default is 002 For

communication with WattMaster Controls the Modbus ID has been set by the factory to 009 for

outside airflow applications For additional information refer to the Section 411

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

Baud Rate (BACnet amp Modbus Communication Options) 4911

The Baud Rate Menu allows the user to set a unique network baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate Modbus communications supports

96 192 384 576 and 1152 Kbps baud rate The default is 384 Kbps For communication

with WattMaster Controls the Baud Rate has been set by the factory to 96 Kbps For additional

information refer to Section 411

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

35

410 WARNING MESSAGES

Input Pressure Overrange Message 4101

If the input pressure exceeds the entered Operating Range Value the following message will

appear on the display It will alternate between the process display and the error message until

the input falls below the Operating Range Value

- Caution -

Input Beyond

Operating Range

Selected

Transducer Calibration Message 4102

If during a transducer zero or span calibration process the transducer output pressure value

measured exceeds plusmn20 of the expected value the following message will appear on the display

Once the Enter button is pressed the display returns to the previous calibration menu

Value entered is

Outside Factory

set limits

(Press Enter)

Operating Range Message 4103

If the new values entered for Temperature Compensation Area Factor or Altitude (see Sections

487 491 and 494) causes the Operating Range Value to exceed the new calculated

Maximum Full Scale Value the following message will appear on the display

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

New Operating Range Message 4104

If a user enters a new Operating Range Value the following message will appear on the display

notifying the user that if any 4 PT Flow Correction Values (see Section 497) were previously

entered they will be reset The message allows the user to confirm that the Operating Range

change should be made To complete the Operating Range change the user must use the

UPDown buttons to change the NO to a YES and press the ENTER button

Value will

Reset 4PT

Flow Correction

Values

Make the Change

(NO)

(Press Enter)

36

411 NETWORK COMMUNICATION

The AAON Airflow Signal Processor can be ordered with BACnet Modbus or LonWorks

Communication For BACnet Communication the AAON Airflow Signal Processors utilize

MSTP (Master SlaveToken Passing) BACnet type protocol BACnet is implemented using

EIA-485 signaling standards through a shielded twisted pair wire operating at a baud rate of 96

Kbps to 768 Kbps Each device has a unique MAC Address ranging from 2 to 127 Refer to

Section 4113 for BACnet Protocol Implementation Conformance Statements (PICS) For

Modbus Communication the AAON Airflow Signal Processors utilize the Modbus ndash RTU Slave

protocol using EIA-485 signaling standards through a shielded twisted pair wire operating at a

baud rate of 96 Kbps to 1152 Kbps Each device has a unique Modbus ID ranging from 1 to

254 Refer to Section 4114 for Modbus software configuration parameters For LonWorks

Communication each AAON Airflow Signal Processor has a unique Neuron Chip ID which is

loaded on the network by pressing a service switch located on the main board (see Section

4111 Figure 7) The LonWorks network utilizes a shielded twisted pair wire operating at a

fixed baud rate of 78 Kbps Refer to Section 4115 for LonWorks network variables

Sections 4111 and 4112 contain procedures for electrical connection of the AAON Airflow

Signal Processor to the network and for configuring the required communication parameters

Electrical Connection 4111

The following procedure outlines the steps for installing the interface wiring for network

communication Network wire should be low capacitance shielded 22 or 24 AWG twisted pair

with PVC jacket such as Belden Part numbers 9841 3105A or equivalent

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Verify that the Power Switch (S3) is in the OFF position and install the interface

wiring for Pins 9 and 10 as shown in Figure 7 If multiple AAON Airflow Signal

Processors will be connected to the same network see Figure 8 for connecting

multiple devices For network systems that require all devices to have a common

signal ground refer to Figure 9 for electrical connection The J2 electrical

connector has a removable terminal block for ease of installing the interface

wiring

Step 4 For proper operation of BACnet and Modbus communication networks the

device that is electrically installed at the end of the network may require the

Terminator Switch be moved to the ON position to prevent line and data

reflection If Terminator is required it must be applied to both physical ends of

the network All other devices should have the Terminator Switch in the OFF

position The communication board is located on the back side of the main

AAON Airflow Signal Processor board See Figure 10 below for Terminator

Switch location on the communication board

Step 5 For LonWorks Communication refer to Figure 7 for the location of the Lon

Service Pin

37

Step 6 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 7 Configure the required parameters as outlined in Section 4112

Step 8 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

RP1

S3

NETWORK

COMMUNICATION+

-

LON

SERVICE PIN

Figure 7 - Network Communication Electrical Connection

38

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

AAON AIRFLOW

SIGNAL PROCESSOR

CONNECT ONLY ONE END OF SHIELD

WIRE TO EARTH GROUND AS SHOWN

SET TERMINATOR SWITCH

ON IF REQUIRED

NETWORK

COMMUNICATIONS

NETWORK

CONNECT SHIELD

WIRES TOGETHER

CONNECT SHIELD

WIRES TOGETHER

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not

Requiring Common Signal Grounds

Note If using two conductor communication wire use the shield wire to connect all device signal grounds together as shown in the figure below If using three conductor communication wire use the 3rd conductor to connect all device signal grounds together and connect one side of the shield to earth ground

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

SIGNAL

GROUND

8

J2

SIGNAL

GROUND

8

J28

J2

USE SHIELD WIRE OR 3RD CONDUCTOR TO

CONNECT DEVICE SIGNAL GROUND TO

NETWORK SIGNAL GROUND

SET TERMINATOR SWITCH

ON IF REQUIRED

AAON AIRFLOW

SIGNAL PROCESSOR

NETWORK

COMMUNICATIONS

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

SIGNAL

GROUND

SIGNAL

GROUND

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds

39

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location

COMMUNICATION BOARD ID

BOARD SERIAL NO

40

Parameter Configuration 4112

If BACnet or Modbus communication is ordered the associated settings will need to be

configured with the exception of Modbus communication with WattMaster Controls which has

been configured at the factory To set the parameters refer to the following procedure below

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 41121

through 41124 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

41121 MAC Address (BACnet Communication Option)

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network Each AAON Airflow Signal

Processor must have a unique MAC Address assigned ranging from 2 to 127

Tech Config

Password 1000

4PT Flow Corr MAC Address

MAC Address (Range = 02 to 254)

Instance Number

Modbus ID (002)

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 29: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

29

If the Area Factor is reconfigured and the new Area Factor causes the existing Operating Range

Value to be outside the new calculated Minimum or Maximum Full Scale Value the below

Warning Message will appear and the Operating Range will be reset to the new Maximum Full

Scale Value by pressing Enter The display will automatically jump to the Operating Range

Menu allowing the user to enter a new Operating Range Value This can be accomplished by

performing the steps under Section 481 See Area Factor Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Area Factor

(FT )

(001000)

Area Factor

(FT )

Accepted

(001200)

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Area

Factor and pressing

the Enter button will

calculate new Min amp

Max Op Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Area Factor Example-

2

2

30

Minimum Calibration 492

The Minimum Calibration Menu allows a user to perform a minimum transducer calibration

This value will be placed in a different memory location and used until a Return to Factory

Defaults is selected (see Section 4811)

(Caution Before performing a minimum calibration disconnect the Total (High) and Static

(Low) Pressure connections perform a minimum calibration and then reconnect the Total

and Static Pressure connections)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00000) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Span Calibration 493

The Span Calibration Menu allows the user to perform a span transducer calibration to eliminate

any possible transducer drift This value will be placed in a different memory location than the

Factory Span memory location and used until a Return to Factory Defaults is selected (see

Section 4811)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00570) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Altitude 494

The Altitude Menu allows the user to enter the specific altitude for the job for the density

calculations the job specific site Altitude has been preprogramed by the factory

Tech Config

Password 1000

Area Factor Altitude

Min Calibration

Span Calibration (0000)Ft

Altitude

31

If the Altitude is changed from the factory setting and the new Altitude causes the existing

Operating Range Value to be outside the new calculated Minimum or Maximum Full Scale

Value the below Warning Message will appear and the Operating Range will be reset to the new

Maximum Full Scale Value by pressing Enter The display will automatically jump to the

Operating Range Menu allowing the user to enter a new Operating Range Value This can be

accomplished by performing the steps under Section 481 See Altitude Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Altitude

(0000)Ft

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Altitude

and pressing the Enter

button will calculate

new Min amp Max Op

Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Altitude Example-

Altitude

Accepted

(0100)Ft

32

Process Output Calibration 495

4951 Minimum Calibration

The Minimum Calibration Menu allows the user to make output zero adjustments Monitor the

output and with each Up or Down key depression the output will increase or decrease by

001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

4952 Span Calibration

The Span Calibration Menu allows the user to make output span adjustments Span adjustments

require a low pressure air source adjusted to the Full Scale Value shown on the side label

Monitor the output and with each Up or Down button depression the output will increase or

decrease by 001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

Probe Coefficient 496

The Probe Correction Coefficient Menu allows the user to modify the formula constant of

109670 used for non-amplified Pitot-type flow sensors

Tech Config

Password 1000

Output Calibration Correction Coeff

Correction Coeff Probe

4PT Flow Corr (109670)

MAC Address (00109670)

33

Four Point Flow Correction 497

The Four Point Flow Correction Menu allows the user to make corrections to the display and

output signal at 20 increments between 20 and 80 of the Operating Range Value entered

The Displayed Value is a fixed value determined by the percentage of Operating Range The

Measured Value is the value determined by an independent balancerrsquos reading

Tech Config

Password 1000

Output Calibration 80000 CFM Displayed Value

Correction Coeff 60000 CFM 80000

4PT Flow Corr 40000 CFM Measured Value

MAC Address 20000 CFM 79500

80000 CFM Displayed Value

60000 CFM 60000

40000 CFM Measured Value

20000 CFM 60500

80000 CFM Displayed Value

60000 CFM 40000

40000 CFM Measured Value

20000 CFM 40100

80000 CFM Displayed Value

60000 CFM 20000

40000 CFM Measured Value

20000 CFM 19500

MAC Address (BACnet Communication Option) 498

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network The default is 002 For

additional information refer to Section 411

Tech Config

Password 1000

Output Calibration MAC Address

Correction Coeff (Range = 02 to 254)

4PT Flow Corr

MAC Address (002)

34

Instance Number (BACnet Communication Option) 499

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The default is 1002 For

additional information refer to Section 411

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (Default = 1002)

Instance Number

Modbus ID (01002)

Modbus ID (Modbus Communication Option) 4910

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network The default is 002 For

communication with WattMaster Controls the Modbus ID has been set by the factory to 009 for

outside airflow applications For additional information refer to the Section 411

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

Baud Rate (BACnet amp Modbus Communication Options) 4911

The Baud Rate Menu allows the user to set a unique network baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate Modbus communications supports

96 192 384 576 and 1152 Kbps baud rate The default is 384 Kbps For communication

with WattMaster Controls the Baud Rate has been set by the factory to 96 Kbps For additional

information refer to Section 411

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

35

410 WARNING MESSAGES

Input Pressure Overrange Message 4101

If the input pressure exceeds the entered Operating Range Value the following message will

appear on the display It will alternate between the process display and the error message until

the input falls below the Operating Range Value

- Caution -

Input Beyond

Operating Range

Selected

Transducer Calibration Message 4102

If during a transducer zero or span calibration process the transducer output pressure value

measured exceeds plusmn20 of the expected value the following message will appear on the display

Once the Enter button is pressed the display returns to the previous calibration menu

Value entered is

Outside Factory

set limits

(Press Enter)

Operating Range Message 4103

If the new values entered for Temperature Compensation Area Factor or Altitude (see Sections

487 491 and 494) causes the Operating Range Value to exceed the new calculated

Maximum Full Scale Value the following message will appear on the display

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

New Operating Range Message 4104

If a user enters a new Operating Range Value the following message will appear on the display

notifying the user that if any 4 PT Flow Correction Values (see Section 497) were previously

entered they will be reset The message allows the user to confirm that the Operating Range

change should be made To complete the Operating Range change the user must use the

UPDown buttons to change the NO to a YES and press the ENTER button

Value will

Reset 4PT

Flow Correction

Values

Make the Change

(NO)

(Press Enter)

36

411 NETWORK COMMUNICATION

The AAON Airflow Signal Processor can be ordered with BACnet Modbus or LonWorks

Communication For BACnet Communication the AAON Airflow Signal Processors utilize

MSTP (Master SlaveToken Passing) BACnet type protocol BACnet is implemented using

EIA-485 signaling standards through a shielded twisted pair wire operating at a baud rate of 96

Kbps to 768 Kbps Each device has a unique MAC Address ranging from 2 to 127 Refer to

Section 4113 for BACnet Protocol Implementation Conformance Statements (PICS) For

Modbus Communication the AAON Airflow Signal Processors utilize the Modbus ndash RTU Slave

protocol using EIA-485 signaling standards through a shielded twisted pair wire operating at a

baud rate of 96 Kbps to 1152 Kbps Each device has a unique Modbus ID ranging from 1 to

254 Refer to Section 4114 for Modbus software configuration parameters For LonWorks

Communication each AAON Airflow Signal Processor has a unique Neuron Chip ID which is

loaded on the network by pressing a service switch located on the main board (see Section

4111 Figure 7) The LonWorks network utilizes a shielded twisted pair wire operating at a

fixed baud rate of 78 Kbps Refer to Section 4115 for LonWorks network variables

Sections 4111 and 4112 contain procedures for electrical connection of the AAON Airflow

Signal Processor to the network and for configuring the required communication parameters

Electrical Connection 4111

The following procedure outlines the steps for installing the interface wiring for network

communication Network wire should be low capacitance shielded 22 or 24 AWG twisted pair

with PVC jacket such as Belden Part numbers 9841 3105A or equivalent

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Verify that the Power Switch (S3) is in the OFF position and install the interface

wiring for Pins 9 and 10 as shown in Figure 7 If multiple AAON Airflow Signal

Processors will be connected to the same network see Figure 8 for connecting

multiple devices For network systems that require all devices to have a common

signal ground refer to Figure 9 for electrical connection The J2 electrical

connector has a removable terminal block for ease of installing the interface

wiring

Step 4 For proper operation of BACnet and Modbus communication networks the

device that is electrically installed at the end of the network may require the

Terminator Switch be moved to the ON position to prevent line and data

reflection If Terminator is required it must be applied to both physical ends of

the network All other devices should have the Terminator Switch in the OFF

position The communication board is located on the back side of the main

AAON Airflow Signal Processor board See Figure 10 below for Terminator

Switch location on the communication board

Step 5 For LonWorks Communication refer to Figure 7 for the location of the Lon

Service Pin

37

Step 6 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 7 Configure the required parameters as outlined in Section 4112

Step 8 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

RP1

S3

NETWORK

COMMUNICATION+

-

LON

SERVICE PIN

Figure 7 - Network Communication Electrical Connection

38

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

AAON AIRFLOW

SIGNAL PROCESSOR

CONNECT ONLY ONE END OF SHIELD

WIRE TO EARTH GROUND AS SHOWN

SET TERMINATOR SWITCH

ON IF REQUIRED

NETWORK

COMMUNICATIONS

NETWORK

CONNECT SHIELD

WIRES TOGETHER

CONNECT SHIELD

WIRES TOGETHER

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not

Requiring Common Signal Grounds

Note If using two conductor communication wire use the shield wire to connect all device signal grounds together as shown in the figure below If using three conductor communication wire use the 3rd conductor to connect all device signal grounds together and connect one side of the shield to earth ground

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

SIGNAL

GROUND

8

J2

SIGNAL

GROUND

8

J28

J2

USE SHIELD WIRE OR 3RD CONDUCTOR TO

CONNECT DEVICE SIGNAL GROUND TO

NETWORK SIGNAL GROUND

SET TERMINATOR SWITCH

ON IF REQUIRED

AAON AIRFLOW

SIGNAL PROCESSOR

NETWORK

COMMUNICATIONS

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

SIGNAL

GROUND

SIGNAL

GROUND

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds

39

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location

COMMUNICATION BOARD ID

BOARD SERIAL NO

40

Parameter Configuration 4112

If BACnet or Modbus communication is ordered the associated settings will need to be

configured with the exception of Modbus communication with WattMaster Controls which has

been configured at the factory To set the parameters refer to the following procedure below

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 41121

through 41124 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

41121 MAC Address (BACnet Communication Option)

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network Each AAON Airflow Signal

Processor must have a unique MAC Address assigned ranging from 2 to 127

Tech Config

Password 1000

4PT Flow Corr MAC Address

MAC Address (Range = 02 to 254)

Instance Number

Modbus ID (002)

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 30: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

30

Minimum Calibration 492

The Minimum Calibration Menu allows a user to perform a minimum transducer calibration

This value will be placed in a different memory location and used until a Return to Factory

Defaults is selected (see Section 4811)

(Caution Before performing a minimum calibration disconnect the Total (High) and Static

(Low) Pressure connections perform a minimum calibration and then reconnect the Total

and Static Pressure connections)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00000) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Span Calibration 493

The Span Calibration Menu allows the user to perform a span transducer calibration to eliminate

any possible transducer drift This value will be placed in a different memory location than the

Factory Span memory location and used until a Return to Factory Defaults is selected (see

Section 4811)

Tech Config

Password 1000

Area Factor Input Value CPU Taking

Min Calibration (00570) Inch wc Samples

Span Calibration

Altitude (Press Enter) (Please Wait)

Altitude 494

The Altitude Menu allows the user to enter the specific altitude for the job for the density

calculations the job specific site Altitude has been preprogramed by the factory

Tech Config

Password 1000

Area Factor Altitude

Min Calibration

Span Calibration (0000)Ft

Altitude

31

If the Altitude is changed from the factory setting and the new Altitude causes the existing

Operating Range Value to be outside the new calculated Minimum or Maximum Full Scale

Value the below Warning Message will appear and the Operating Range will be reset to the new

Maximum Full Scale Value by pressing Enter The display will automatically jump to the

Operating Range Menu allowing the user to enter a new Operating Range Value This can be

accomplished by performing the steps under Section 481 See Altitude Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Altitude

(0000)Ft

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Altitude

and pressing the Enter

button will calculate

new Min amp Max Op

Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Altitude Example-

Altitude

Accepted

(0100)Ft

32

Process Output Calibration 495

4951 Minimum Calibration

The Minimum Calibration Menu allows the user to make output zero adjustments Monitor the

output and with each Up or Down key depression the output will increase or decrease by

001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

4952 Span Calibration

The Span Calibration Menu allows the user to make output span adjustments Span adjustments

require a low pressure air source adjusted to the Full Scale Value shown on the side label

Monitor the output and with each Up or Down button depression the output will increase or

decrease by 001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

Probe Coefficient 496

The Probe Correction Coefficient Menu allows the user to modify the formula constant of

109670 used for non-amplified Pitot-type flow sensors

Tech Config

Password 1000

Output Calibration Correction Coeff

Correction Coeff Probe

4PT Flow Corr (109670)

MAC Address (00109670)

33

Four Point Flow Correction 497

The Four Point Flow Correction Menu allows the user to make corrections to the display and

output signal at 20 increments between 20 and 80 of the Operating Range Value entered

The Displayed Value is a fixed value determined by the percentage of Operating Range The

Measured Value is the value determined by an independent balancerrsquos reading

Tech Config

Password 1000

Output Calibration 80000 CFM Displayed Value

Correction Coeff 60000 CFM 80000

4PT Flow Corr 40000 CFM Measured Value

MAC Address 20000 CFM 79500

80000 CFM Displayed Value

60000 CFM 60000

40000 CFM Measured Value

20000 CFM 60500

80000 CFM Displayed Value

60000 CFM 40000

40000 CFM Measured Value

20000 CFM 40100

80000 CFM Displayed Value

60000 CFM 20000

40000 CFM Measured Value

20000 CFM 19500

MAC Address (BACnet Communication Option) 498

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network The default is 002 For

additional information refer to Section 411

Tech Config

Password 1000

Output Calibration MAC Address

Correction Coeff (Range = 02 to 254)

4PT Flow Corr

MAC Address (002)

34

Instance Number (BACnet Communication Option) 499

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The default is 1002 For

additional information refer to Section 411

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (Default = 1002)

Instance Number

Modbus ID (01002)

Modbus ID (Modbus Communication Option) 4910

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network The default is 002 For

communication with WattMaster Controls the Modbus ID has been set by the factory to 009 for

outside airflow applications For additional information refer to the Section 411

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

Baud Rate (BACnet amp Modbus Communication Options) 4911

The Baud Rate Menu allows the user to set a unique network baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate Modbus communications supports

96 192 384 576 and 1152 Kbps baud rate The default is 384 Kbps For communication

with WattMaster Controls the Baud Rate has been set by the factory to 96 Kbps For additional

information refer to Section 411

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

35

410 WARNING MESSAGES

Input Pressure Overrange Message 4101

If the input pressure exceeds the entered Operating Range Value the following message will

appear on the display It will alternate between the process display and the error message until

the input falls below the Operating Range Value

- Caution -

Input Beyond

Operating Range

Selected

Transducer Calibration Message 4102

If during a transducer zero or span calibration process the transducer output pressure value

measured exceeds plusmn20 of the expected value the following message will appear on the display

Once the Enter button is pressed the display returns to the previous calibration menu

Value entered is

Outside Factory

set limits

(Press Enter)

Operating Range Message 4103

If the new values entered for Temperature Compensation Area Factor or Altitude (see Sections

487 491 and 494) causes the Operating Range Value to exceed the new calculated

Maximum Full Scale Value the following message will appear on the display

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

New Operating Range Message 4104

If a user enters a new Operating Range Value the following message will appear on the display

notifying the user that if any 4 PT Flow Correction Values (see Section 497) were previously

entered they will be reset The message allows the user to confirm that the Operating Range

change should be made To complete the Operating Range change the user must use the

UPDown buttons to change the NO to a YES and press the ENTER button

Value will

Reset 4PT

Flow Correction

Values

Make the Change

(NO)

(Press Enter)

36

411 NETWORK COMMUNICATION

The AAON Airflow Signal Processor can be ordered with BACnet Modbus or LonWorks

Communication For BACnet Communication the AAON Airflow Signal Processors utilize

MSTP (Master SlaveToken Passing) BACnet type protocol BACnet is implemented using

EIA-485 signaling standards through a shielded twisted pair wire operating at a baud rate of 96

Kbps to 768 Kbps Each device has a unique MAC Address ranging from 2 to 127 Refer to

Section 4113 for BACnet Protocol Implementation Conformance Statements (PICS) For

Modbus Communication the AAON Airflow Signal Processors utilize the Modbus ndash RTU Slave

protocol using EIA-485 signaling standards through a shielded twisted pair wire operating at a

baud rate of 96 Kbps to 1152 Kbps Each device has a unique Modbus ID ranging from 1 to

254 Refer to Section 4114 for Modbus software configuration parameters For LonWorks

Communication each AAON Airflow Signal Processor has a unique Neuron Chip ID which is

loaded on the network by pressing a service switch located on the main board (see Section

4111 Figure 7) The LonWorks network utilizes a shielded twisted pair wire operating at a

fixed baud rate of 78 Kbps Refer to Section 4115 for LonWorks network variables

Sections 4111 and 4112 contain procedures for electrical connection of the AAON Airflow

Signal Processor to the network and for configuring the required communication parameters

Electrical Connection 4111

The following procedure outlines the steps for installing the interface wiring for network

communication Network wire should be low capacitance shielded 22 or 24 AWG twisted pair

with PVC jacket such as Belden Part numbers 9841 3105A or equivalent

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Verify that the Power Switch (S3) is in the OFF position and install the interface

wiring for Pins 9 and 10 as shown in Figure 7 If multiple AAON Airflow Signal

Processors will be connected to the same network see Figure 8 for connecting

multiple devices For network systems that require all devices to have a common

signal ground refer to Figure 9 for electrical connection The J2 electrical

connector has a removable terminal block for ease of installing the interface

wiring

Step 4 For proper operation of BACnet and Modbus communication networks the

device that is electrically installed at the end of the network may require the

Terminator Switch be moved to the ON position to prevent line and data

reflection If Terminator is required it must be applied to both physical ends of

the network All other devices should have the Terminator Switch in the OFF

position The communication board is located on the back side of the main

AAON Airflow Signal Processor board See Figure 10 below for Terminator

Switch location on the communication board

Step 5 For LonWorks Communication refer to Figure 7 for the location of the Lon

Service Pin

37

Step 6 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 7 Configure the required parameters as outlined in Section 4112

Step 8 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

RP1

S3

NETWORK

COMMUNICATION+

-

LON

SERVICE PIN

Figure 7 - Network Communication Electrical Connection

38

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

AAON AIRFLOW

SIGNAL PROCESSOR

CONNECT ONLY ONE END OF SHIELD

WIRE TO EARTH GROUND AS SHOWN

SET TERMINATOR SWITCH

ON IF REQUIRED

NETWORK

COMMUNICATIONS

NETWORK

CONNECT SHIELD

WIRES TOGETHER

CONNECT SHIELD

WIRES TOGETHER

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not

Requiring Common Signal Grounds

Note If using two conductor communication wire use the shield wire to connect all device signal grounds together as shown in the figure below If using three conductor communication wire use the 3rd conductor to connect all device signal grounds together and connect one side of the shield to earth ground

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

SIGNAL

GROUND

8

J2

SIGNAL

GROUND

8

J28

J2

USE SHIELD WIRE OR 3RD CONDUCTOR TO

CONNECT DEVICE SIGNAL GROUND TO

NETWORK SIGNAL GROUND

SET TERMINATOR SWITCH

ON IF REQUIRED

AAON AIRFLOW

SIGNAL PROCESSOR

NETWORK

COMMUNICATIONS

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

SIGNAL

GROUND

SIGNAL

GROUND

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds

39

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location

COMMUNICATION BOARD ID

BOARD SERIAL NO

40

Parameter Configuration 4112

If BACnet or Modbus communication is ordered the associated settings will need to be

configured with the exception of Modbus communication with WattMaster Controls which has

been configured at the factory To set the parameters refer to the following procedure below

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 41121

through 41124 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

41121 MAC Address (BACnet Communication Option)

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network Each AAON Airflow Signal

Processor must have a unique MAC Address assigned ranging from 2 to 127

Tech Config

Password 1000

4PT Flow Corr MAC Address

MAC Address (Range = 02 to 254)

Instance Number

Modbus ID (002)

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 31: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

31

If the Altitude is changed from the factory setting and the new Altitude causes the existing

Operating Range Value to be outside the new calculated Minimum or Maximum Full Scale

Value the below Warning Message will appear and the Operating Range will be reset to the new

Maximum Full Scale Value by pressing Enter The display will automatically jump to the

Operating Range Menu allowing the user to enter a new Operating Range Value This can be

accomplished by performing the steps under Section 481 See Altitude Example below

Warning Message

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

Altitude

(0000)Ft

Op Range Outside

Allowable Value

Reset to Max FS

(Press Enter)

Op Range value within

New MinMax values

Op Range value exceeds

New MinMax values

Entering a new Altitude

and pressing the Enter

button will calculate

new Min amp Max Op

Range values

Warning Message

Operating Range

(ACFM)

(6000 - 12000)

(12000)

Pressing the Enter button

will reset the current Op

Range value to the new

calculated Max FS value

which will represent 100

of the process output value

The Op Range value can be

changed and will represent

100 of the process output

signal (5vdc 10vdc or 20mA)

-Altitude Example-

Altitude

Accepted

(0100)Ft

32

Process Output Calibration 495

4951 Minimum Calibration

The Minimum Calibration Menu allows the user to make output zero adjustments Monitor the

output and with each Up or Down key depression the output will increase or decrease by

001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

4952 Span Calibration

The Span Calibration Menu allows the user to make output span adjustments Span adjustments

require a low pressure air source adjusted to the Full Scale Value shown on the side label

Monitor the output and with each Up or Down button depression the output will increase or

decrease by 001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

Probe Coefficient 496

The Probe Correction Coefficient Menu allows the user to modify the formula constant of

109670 used for non-amplified Pitot-type flow sensors

Tech Config

Password 1000

Output Calibration Correction Coeff

Correction Coeff Probe

4PT Flow Corr (109670)

MAC Address (00109670)

33

Four Point Flow Correction 497

The Four Point Flow Correction Menu allows the user to make corrections to the display and

output signal at 20 increments between 20 and 80 of the Operating Range Value entered

The Displayed Value is a fixed value determined by the percentage of Operating Range The

Measured Value is the value determined by an independent balancerrsquos reading

Tech Config

Password 1000

Output Calibration 80000 CFM Displayed Value

Correction Coeff 60000 CFM 80000

4PT Flow Corr 40000 CFM Measured Value

MAC Address 20000 CFM 79500

80000 CFM Displayed Value

60000 CFM 60000

40000 CFM Measured Value

20000 CFM 60500

80000 CFM Displayed Value

60000 CFM 40000

40000 CFM Measured Value

20000 CFM 40100

80000 CFM Displayed Value

60000 CFM 20000

40000 CFM Measured Value

20000 CFM 19500

MAC Address (BACnet Communication Option) 498

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network The default is 002 For

additional information refer to Section 411

Tech Config

Password 1000

Output Calibration MAC Address

Correction Coeff (Range = 02 to 254)

4PT Flow Corr

MAC Address (002)

34

Instance Number (BACnet Communication Option) 499

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The default is 1002 For

additional information refer to Section 411

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (Default = 1002)

Instance Number

Modbus ID (01002)

Modbus ID (Modbus Communication Option) 4910

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network The default is 002 For

communication with WattMaster Controls the Modbus ID has been set by the factory to 009 for

outside airflow applications For additional information refer to the Section 411

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

Baud Rate (BACnet amp Modbus Communication Options) 4911

The Baud Rate Menu allows the user to set a unique network baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate Modbus communications supports

96 192 384 576 and 1152 Kbps baud rate The default is 384 Kbps For communication

with WattMaster Controls the Baud Rate has been set by the factory to 96 Kbps For additional

information refer to Section 411

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

35

410 WARNING MESSAGES

Input Pressure Overrange Message 4101

If the input pressure exceeds the entered Operating Range Value the following message will

appear on the display It will alternate between the process display and the error message until

the input falls below the Operating Range Value

- Caution -

Input Beyond

Operating Range

Selected

Transducer Calibration Message 4102

If during a transducer zero or span calibration process the transducer output pressure value

measured exceeds plusmn20 of the expected value the following message will appear on the display

Once the Enter button is pressed the display returns to the previous calibration menu

Value entered is

Outside Factory

set limits

(Press Enter)

Operating Range Message 4103

If the new values entered for Temperature Compensation Area Factor or Altitude (see Sections

487 491 and 494) causes the Operating Range Value to exceed the new calculated

Maximum Full Scale Value the following message will appear on the display

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

New Operating Range Message 4104

If a user enters a new Operating Range Value the following message will appear on the display

notifying the user that if any 4 PT Flow Correction Values (see Section 497) were previously

entered they will be reset The message allows the user to confirm that the Operating Range

change should be made To complete the Operating Range change the user must use the

UPDown buttons to change the NO to a YES and press the ENTER button

Value will

Reset 4PT

Flow Correction

Values

Make the Change

(NO)

(Press Enter)

36

411 NETWORK COMMUNICATION

The AAON Airflow Signal Processor can be ordered with BACnet Modbus or LonWorks

Communication For BACnet Communication the AAON Airflow Signal Processors utilize

MSTP (Master SlaveToken Passing) BACnet type protocol BACnet is implemented using

EIA-485 signaling standards through a shielded twisted pair wire operating at a baud rate of 96

Kbps to 768 Kbps Each device has a unique MAC Address ranging from 2 to 127 Refer to

Section 4113 for BACnet Protocol Implementation Conformance Statements (PICS) For

Modbus Communication the AAON Airflow Signal Processors utilize the Modbus ndash RTU Slave

protocol using EIA-485 signaling standards through a shielded twisted pair wire operating at a

baud rate of 96 Kbps to 1152 Kbps Each device has a unique Modbus ID ranging from 1 to

254 Refer to Section 4114 for Modbus software configuration parameters For LonWorks

Communication each AAON Airflow Signal Processor has a unique Neuron Chip ID which is

loaded on the network by pressing a service switch located on the main board (see Section

4111 Figure 7) The LonWorks network utilizes a shielded twisted pair wire operating at a

fixed baud rate of 78 Kbps Refer to Section 4115 for LonWorks network variables

Sections 4111 and 4112 contain procedures for electrical connection of the AAON Airflow

Signal Processor to the network and for configuring the required communication parameters

Electrical Connection 4111

The following procedure outlines the steps for installing the interface wiring for network

communication Network wire should be low capacitance shielded 22 or 24 AWG twisted pair

with PVC jacket such as Belden Part numbers 9841 3105A or equivalent

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Verify that the Power Switch (S3) is in the OFF position and install the interface

wiring for Pins 9 and 10 as shown in Figure 7 If multiple AAON Airflow Signal

Processors will be connected to the same network see Figure 8 for connecting

multiple devices For network systems that require all devices to have a common

signal ground refer to Figure 9 for electrical connection The J2 electrical

connector has a removable terminal block for ease of installing the interface

wiring

Step 4 For proper operation of BACnet and Modbus communication networks the

device that is electrically installed at the end of the network may require the

Terminator Switch be moved to the ON position to prevent line and data

reflection If Terminator is required it must be applied to both physical ends of

the network All other devices should have the Terminator Switch in the OFF

position The communication board is located on the back side of the main

AAON Airflow Signal Processor board See Figure 10 below for Terminator

Switch location on the communication board

Step 5 For LonWorks Communication refer to Figure 7 for the location of the Lon

Service Pin

37

Step 6 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 7 Configure the required parameters as outlined in Section 4112

Step 8 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

RP1

S3

NETWORK

COMMUNICATION+

-

LON

SERVICE PIN

Figure 7 - Network Communication Electrical Connection

38

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

AAON AIRFLOW

SIGNAL PROCESSOR

CONNECT ONLY ONE END OF SHIELD

WIRE TO EARTH GROUND AS SHOWN

SET TERMINATOR SWITCH

ON IF REQUIRED

NETWORK

COMMUNICATIONS

NETWORK

CONNECT SHIELD

WIRES TOGETHER

CONNECT SHIELD

WIRES TOGETHER

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not

Requiring Common Signal Grounds

Note If using two conductor communication wire use the shield wire to connect all device signal grounds together as shown in the figure below If using three conductor communication wire use the 3rd conductor to connect all device signal grounds together and connect one side of the shield to earth ground

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

SIGNAL

GROUND

8

J2

SIGNAL

GROUND

8

J28

J2

USE SHIELD WIRE OR 3RD CONDUCTOR TO

CONNECT DEVICE SIGNAL GROUND TO

NETWORK SIGNAL GROUND

SET TERMINATOR SWITCH

ON IF REQUIRED

AAON AIRFLOW

SIGNAL PROCESSOR

NETWORK

COMMUNICATIONS

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

SIGNAL

GROUND

SIGNAL

GROUND

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds

39

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location

COMMUNICATION BOARD ID

BOARD SERIAL NO

40

Parameter Configuration 4112

If BACnet or Modbus communication is ordered the associated settings will need to be

configured with the exception of Modbus communication with WattMaster Controls which has

been configured at the factory To set the parameters refer to the following procedure below

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 41121

through 41124 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

41121 MAC Address (BACnet Communication Option)

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network Each AAON Airflow Signal

Processor must have a unique MAC Address assigned ranging from 2 to 127

Tech Config

Password 1000

4PT Flow Corr MAC Address

MAC Address (Range = 02 to 254)

Instance Number

Modbus ID (002)

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 32: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

32

Process Output Calibration 495

4951 Minimum Calibration

The Minimum Calibration Menu allows the user to make output zero adjustments Monitor the

output and with each Up or Down key depression the output will increase or decrease by

001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

4952 Span Calibration

The Span Calibration Menu allows the user to make output span adjustments Span adjustments

require a low pressure air source adjusted to the Full Scale Value shown on the side label

Monitor the output and with each Up or Down button depression the output will increase or

decrease by 001VDC or 001mA depending on output selection

Tech Config

Password 1000

Output Calibration Min Calibration Use UpDown

Correction Coeff Span Calibration Buttons

4PT Flow Corr Adjust Output

MAC Address (Press Enter)

Probe Coefficient 496

The Probe Correction Coefficient Menu allows the user to modify the formula constant of

109670 used for non-amplified Pitot-type flow sensors

Tech Config

Password 1000

Output Calibration Correction Coeff

Correction Coeff Probe

4PT Flow Corr (109670)

MAC Address (00109670)

33

Four Point Flow Correction 497

The Four Point Flow Correction Menu allows the user to make corrections to the display and

output signal at 20 increments between 20 and 80 of the Operating Range Value entered

The Displayed Value is a fixed value determined by the percentage of Operating Range The

Measured Value is the value determined by an independent balancerrsquos reading

Tech Config

Password 1000

Output Calibration 80000 CFM Displayed Value

Correction Coeff 60000 CFM 80000

4PT Flow Corr 40000 CFM Measured Value

MAC Address 20000 CFM 79500

80000 CFM Displayed Value

60000 CFM 60000

40000 CFM Measured Value

20000 CFM 60500

80000 CFM Displayed Value

60000 CFM 40000

40000 CFM Measured Value

20000 CFM 40100

80000 CFM Displayed Value

60000 CFM 20000

40000 CFM Measured Value

20000 CFM 19500

MAC Address (BACnet Communication Option) 498

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network The default is 002 For

additional information refer to Section 411

Tech Config

Password 1000

Output Calibration MAC Address

Correction Coeff (Range = 02 to 254)

4PT Flow Corr

MAC Address (002)

34

Instance Number (BACnet Communication Option) 499

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The default is 1002 For

additional information refer to Section 411

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (Default = 1002)

Instance Number

Modbus ID (01002)

Modbus ID (Modbus Communication Option) 4910

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network The default is 002 For

communication with WattMaster Controls the Modbus ID has been set by the factory to 009 for

outside airflow applications For additional information refer to the Section 411

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

Baud Rate (BACnet amp Modbus Communication Options) 4911

The Baud Rate Menu allows the user to set a unique network baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate Modbus communications supports

96 192 384 576 and 1152 Kbps baud rate The default is 384 Kbps For communication

with WattMaster Controls the Baud Rate has been set by the factory to 96 Kbps For additional

information refer to Section 411

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

35

410 WARNING MESSAGES

Input Pressure Overrange Message 4101

If the input pressure exceeds the entered Operating Range Value the following message will

appear on the display It will alternate between the process display and the error message until

the input falls below the Operating Range Value

- Caution -

Input Beyond

Operating Range

Selected

Transducer Calibration Message 4102

If during a transducer zero or span calibration process the transducer output pressure value

measured exceeds plusmn20 of the expected value the following message will appear on the display

Once the Enter button is pressed the display returns to the previous calibration menu

Value entered is

Outside Factory

set limits

(Press Enter)

Operating Range Message 4103

If the new values entered for Temperature Compensation Area Factor or Altitude (see Sections

487 491 and 494) causes the Operating Range Value to exceed the new calculated

Maximum Full Scale Value the following message will appear on the display

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

New Operating Range Message 4104

If a user enters a new Operating Range Value the following message will appear on the display

notifying the user that if any 4 PT Flow Correction Values (see Section 497) were previously

entered they will be reset The message allows the user to confirm that the Operating Range

change should be made To complete the Operating Range change the user must use the

UPDown buttons to change the NO to a YES and press the ENTER button

Value will

Reset 4PT

Flow Correction

Values

Make the Change

(NO)

(Press Enter)

36

411 NETWORK COMMUNICATION

The AAON Airflow Signal Processor can be ordered with BACnet Modbus or LonWorks

Communication For BACnet Communication the AAON Airflow Signal Processors utilize

MSTP (Master SlaveToken Passing) BACnet type protocol BACnet is implemented using

EIA-485 signaling standards through a shielded twisted pair wire operating at a baud rate of 96

Kbps to 768 Kbps Each device has a unique MAC Address ranging from 2 to 127 Refer to

Section 4113 for BACnet Protocol Implementation Conformance Statements (PICS) For

Modbus Communication the AAON Airflow Signal Processors utilize the Modbus ndash RTU Slave

protocol using EIA-485 signaling standards through a shielded twisted pair wire operating at a

baud rate of 96 Kbps to 1152 Kbps Each device has a unique Modbus ID ranging from 1 to

254 Refer to Section 4114 for Modbus software configuration parameters For LonWorks

Communication each AAON Airflow Signal Processor has a unique Neuron Chip ID which is

loaded on the network by pressing a service switch located on the main board (see Section

4111 Figure 7) The LonWorks network utilizes a shielded twisted pair wire operating at a

fixed baud rate of 78 Kbps Refer to Section 4115 for LonWorks network variables

Sections 4111 and 4112 contain procedures for electrical connection of the AAON Airflow

Signal Processor to the network and for configuring the required communication parameters

Electrical Connection 4111

The following procedure outlines the steps for installing the interface wiring for network

communication Network wire should be low capacitance shielded 22 or 24 AWG twisted pair

with PVC jacket such as Belden Part numbers 9841 3105A or equivalent

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Verify that the Power Switch (S3) is in the OFF position and install the interface

wiring for Pins 9 and 10 as shown in Figure 7 If multiple AAON Airflow Signal

Processors will be connected to the same network see Figure 8 for connecting

multiple devices For network systems that require all devices to have a common

signal ground refer to Figure 9 for electrical connection The J2 electrical

connector has a removable terminal block for ease of installing the interface

wiring

Step 4 For proper operation of BACnet and Modbus communication networks the

device that is electrically installed at the end of the network may require the

Terminator Switch be moved to the ON position to prevent line and data

reflection If Terminator is required it must be applied to both physical ends of

the network All other devices should have the Terminator Switch in the OFF

position The communication board is located on the back side of the main

AAON Airflow Signal Processor board See Figure 10 below for Terminator

Switch location on the communication board

Step 5 For LonWorks Communication refer to Figure 7 for the location of the Lon

Service Pin

37

Step 6 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 7 Configure the required parameters as outlined in Section 4112

Step 8 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

RP1

S3

NETWORK

COMMUNICATION+

-

LON

SERVICE PIN

Figure 7 - Network Communication Electrical Connection

38

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

AAON AIRFLOW

SIGNAL PROCESSOR

CONNECT ONLY ONE END OF SHIELD

WIRE TO EARTH GROUND AS SHOWN

SET TERMINATOR SWITCH

ON IF REQUIRED

NETWORK

COMMUNICATIONS

NETWORK

CONNECT SHIELD

WIRES TOGETHER

CONNECT SHIELD

WIRES TOGETHER

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not

Requiring Common Signal Grounds

Note If using two conductor communication wire use the shield wire to connect all device signal grounds together as shown in the figure below If using three conductor communication wire use the 3rd conductor to connect all device signal grounds together and connect one side of the shield to earth ground

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

SIGNAL

GROUND

8

J2

SIGNAL

GROUND

8

J28

J2

USE SHIELD WIRE OR 3RD CONDUCTOR TO

CONNECT DEVICE SIGNAL GROUND TO

NETWORK SIGNAL GROUND

SET TERMINATOR SWITCH

ON IF REQUIRED

AAON AIRFLOW

SIGNAL PROCESSOR

NETWORK

COMMUNICATIONS

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

SIGNAL

GROUND

SIGNAL

GROUND

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds

39

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location

COMMUNICATION BOARD ID

BOARD SERIAL NO

40

Parameter Configuration 4112

If BACnet or Modbus communication is ordered the associated settings will need to be

configured with the exception of Modbus communication with WattMaster Controls which has

been configured at the factory To set the parameters refer to the following procedure below

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 41121

through 41124 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

41121 MAC Address (BACnet Communication Option)

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network Each AAON Airflow Signal

Processor must have a unique MAC Address assigned ranging from 2 to 127

Tech Config

Password 1000

4PT Flow Corr MAC Address

MAC Address (Range = 02 to 254)

Instance Number

Modbus ID (002)

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 33: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

33

Four Point Flow Correction 497

The Four Point Flow Correction Menu allows the user to make corrections to the display and

output signal at 20 increments between 20 and 80 of the Operating Range Value entered

The Displayed Value is a fixed value determined by the percentage of Operating Range The

Measured Value is the value determined by an independent balancerrsquos reading

Tech Config

Password 1000

Output Calibration 80000 CFM Displayed Value

Correction Coeff 60000 CFM 80000

4PT Flow Corr 40000 CFM Measured Value

MAC Address 20000 CFM 79500

80000 CFM Displayed Value

60000 CFM 60000

40000 CFM Measured Value

20000 CFM 60500

80000 CFM Displayed Value

60000 CFM 40000

40000 CFM Measured Value

20000 CFM 40100

80000 CFM Displayed Value

60000 CFM 20000

40000 CFM Measured Value

20000 CFM 19500

MAC Address (BACnet Communication Option) 498

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network The default is 002 For

additional information refer to Section 411

Tech Config

Password 1000

Output Calibration MAC Address

Correction Coeff (Range = 02 to 254)

4PT Flow Corr

MAC Address (002)

34

Instance Number (BACnet Communication Option) 499

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The default is 1002 For

additional information refer to Section 411

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (Default = 1002)

Instance Number

Modbus ID (01002)

Modbus ID (Modbus Communication Option) 4910

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network The default is 002 For

communication with WattMaster Controls the Modbus ID has been set by the factory to 009 for

outside airflow applications For additional information refer to the Section 411

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

Baud Rate (BACnet amp Modbus Communication Options) 4911

The Baud Rate Menu allows the user to set a unique network baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate Modbus communications supports

96 192 384 576 and 1152 Kbps baud rate The default is 384 Kbps For communication

with WattMaster Controls the Baud Rate has been set by the factory to 96 Kbps For additional

information refer to Section 411

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

35

410 WARNING MESSAGES

Input Pressure Overrange Message 4101

If the input pressure exceeds the entered Operating Range Value the following message will

appear on the display It will alternate between the process display and the error message until

the input falls below the Operating Range Value

- Caution -

Input Beyond

Operating Range

Selected

Transducer Calibration Message 4102

If during a transducer zero or span calibration process the transducer output pressure value

measured exceeds plusmn20 of the expected value the following message will appear on the display

Once the Enter button is pressed the display returns to the previous calibration menu

Value entered is

Outside Factory

set limits

(Press Enter)

Operating Range Message 4103

If the new values entered for Temperature Compensation Area Factor or Altitude (see Sections

487 491 and 494) causes the Operating Range Value to exceed the new calculated

Maximum Full Scale Value the following message will appear on the display

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

New Operating Range Message 4104

If a user enters a new Operating Range Value the following message will appear on the display

notifying the user that if any 4 PT Flow Correction Values (see Section 497) were previously

entered they will be reset The message allows the user to confirm that the Operating Range

change should be made To complete the Operating Range change the user must use the

UPDown buttons to change the NO to a YES and press the ENTER button

Value will

Reset 4PT

Flow Correction

Values

Make the Change

(NO)

(Press Enter)

36

411 NETWORK COMMUNICATION

The AAON Airflow Signal Processor can be ordered with BACnet Modbus or LonWorks

Communication For BACnet Communication the AAON Airflow Signal Processors utilize

MSTP (Master SlaveToken Passing) BACnet type protocol BACnet is implemented using

EIA-485 signaling standards through a shielded twisted pair wire operating at a baud rate of 96

Kbps to 768 Kbps Each device has a unique MAC Address ranging from 2 to 127 Refer to

Section 4113 for BACnet Protocol Implementation Conformance Statements (PICS) For

Modbus Communication the AAON Airflow Signal Processors utilize the Modbus ndash RTU Slave

protocol using EIA-485 signaling standards through a shielded twisted pair wire operating at a

baud rate of 96 Kbps to 1152 Kbps Each device has a unique Modbus ID ranging from 1 to

254 Refer to Section 4114 for Modbus software configuration parameters For LonWorks

Communication each AAON Airflow Signal Processor has a unique Neuron Chip ID which is

loaded on the network by pressing a service switch located on the main board (see Section

4111 Figure 7) The LonWorks network utilizes a shielded twisted pair wire operating at a

fixed baud rate of 78 Kbps Refer to Section 4115 for LonWorks network variables

Sections 4111 and 4112 contain procedures for electrical connection of the AAON Airflow

Signal Processor to the network and for configuring the required communication parameters

Electrical Connection 4111

The following procedure outlines the steps for installing the interface wiring for network

communication Network wire should be low capacitance shielded 22 or 24 AWG twisted pair

with PVC jacket such as Belden Part numbers 9841 3105A or equivalent

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Verify that the Power Switch (S3) is in the OFF position and install the interface

wiring for Pins 9 and 10 as shown in Figure 7 If multiple AAON Airflow Signal

Processors will be connected to the same network see Figure 8 for connecting

multiple devices For network systems that require all devices to have a common

signal ground refer to Figure 9 for electrical connection The J2 electrical

connector has a removable terminal block for ease of installing the interface

wiring

Step 4 For proper operation of BACnet and Modbus communication networks the

device that is electrically installed at the end of the network may require the

Terminator Switch be moved to the ON position to prevent line and data

reflection If Terminator is required it must be applied to both physical ends of

the network All other devices should have the Terminator Switch in the OFF

position The communication board is located on the back side of the main

AAON Airflow Signal Processor board See Figure 10 below for Terminator

Switch location on the communication board

Step 5 For LonWorks Communication refer to Figure 7 for the location of the Lon

Service Pin

37

Step 6 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 7 Configure the required parameters as outlined in Section 4112

Step 8 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

RP1

S3

NETWORK

COMMUNICATION+

-

LON

SERVICE PIN

Figure 7 - Network Communication Electrical Connection

38

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

AAON AIRFLOW

SIGNAL PROCESSOR

CONNECT ONLY ONE END OF SHIELD

WIRE TO EARTH GROUND AS SHOWN

SET TERMINATOR SWITCH

ON IF REQUIRED

NETWORK

COMMUNICATIONS

NETWORK

CONNECT SHIELD

WIRES TOGETHER

CONNECT SHIELD

WIRES TOGETHER

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not

Requiring Common Signal Grounds

Note If using two conductor communication wire use the shield wire to connect all device signal grounds together as shown in the figure below If using three conductor communication wire use the 3rd conductor to connect all device signal grounds together and connect one side of the shield to earth ground

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

SIGNAL

GROUND

8

J2

SIGNAL

GROUND

8

J28

J2

USE SHIELD WIRE OR 3RD CONDUCTOR TO

CONNECT DEVICE SIGNAL GROUND TO

NETWORK SIGNAL GROUND

SET TERMINATOR SWITCH

ON IF REQUIRED

AAON AIRFLOW

SIGNAL PROCESSOR

NETWORK

COMMUNICATIONS

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

SIGNAL

GROUND

SIGNAL

GROUND

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds

39

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location

COMMUNICATION BOARD ID

BOARD SERIAL NO

40

Parameter Configuration 4112

If BACnet or Modbus communication is ordered the associated settings will need to be

configured with the exception of Modbus communication with WattMaster Controls which has

been configured at the factory To set the parameters refer to the following procedure below

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 41121

through 41124 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

41121 MAC Address (BACnet Communication Option)

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network Each AAON Airflow Signal

Processor must have a unique MAC Address assigned ranging from 2 to 127

Tech Config

Password 1000

4PT Flow Corr MAC Address

MAC Address (Range = 02 to 254)

Instance Number

Modbus ID (002)

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 34: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

34

Instance Number (BACnet Communication Option) 499

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The default is 1002 For

additional information refer to Section 411

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (Default = 1002)

Instance Number

Modbus ID (01002)

Modbus ID (Modbus Communication Option) 4910

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network The default is 002 For

communication with WattMaster Controls the Modbus ID has been set by the factory to 009 for

outside airflow applications For additional information refer to the Section 411

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

Baud Rate (BACnet amp Modbus Communication Options) 4911

The Baud Rate Menu allows the user to set a unique network baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate Modbus communications supports

96 192 384 576 and 1152 Kbps baud rate The default is 384 Kbps For communication

with WattMaster Controls the Baud Rate has been set by the factory to 96 Kbps For additional

information refer to Section 411

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

35

410 WARNING MESSAGES

Input Pressure Overrange Message 4101

If the input pressure exceeds the entered Operating Range Value the following message will

appear on the display It will alternate between the process display and the error message until

the input falls below the Operating Range Value

- Caution -

Input Beyond

Operating Range

Selected

Transducer Calibration Message 4102

If during a transducer zero or span calibration process the transducer output pressure value

measured exceeds plusmn20 of the expected value the following message will appear on the display

Once the Enter button is pressed the display returns to the previous calibration menu

Value entered is

Outside Factory

set limits

(Press Enter)

Operating Range Message 4103

If the new values entered for Temperature Compensation Area Factor or Altitude (see Sections

487 491 and 494) causes the Operating Range Value to exceed the new calculated

Maximum Full Scale Value the following message will appear on the display

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

New Operating Range Message 4104

If a user enters a new Operating Range Value the following message will appear on the display

notifying the user that if any 4 PT Flow Correction Values (see Section 497) were previously

entered they will be reset The message allows the user to confirm that the Operating Range

change should be made To complete the Operating Range change the user must use the

UPDown buttons to change the NO to a YES and press the ENTER button

Value will

Reset 4PT

Flow Correction

Values

Make the Change

(NO)

(Press Enter)

36

411 NETWORK COMMUNICATION

The AAON Airflow Signal Processor can be ordered with BACnet Modbus or LonWorks

Communication For BACnet Communication the AAON Airflow Signal Processors utilize

MSTP (Master SlaveToken Passing) BACnet type protocol BACnet is implemented using

EIA-485 signaling standards through a shielded twisted pair wire operating at a baud rate of 96

Kbps to 768 Kbps Each device has a unique MAC Address ranging from 2 to 127 Refer to

Section 4113 for BACnet Protocol Implementation Conformance Statements (PICS) For

Modbus Communication the AAON Airflow Signal Processors utilize the Modbus ndash RTU Slave

protocol using EIA-485 signaling standards through a shielded twisted pair wire operating at a

baud rate of 96 Kbps to 1152 Kbps Each device has a unique Modbus ID ranging from 1 to

254 Refer to Section 4114 for Modbus software configuration parameters For LonWorks

Communication each AAON Airflow Signal Processor has a unique Neuron Chip ID which is

loaded on the network by pressing a service switch located on the main board (see Section

4111 Figure 7) The LonWorks network utilizes a shielded twisted pair wire operating at a

fixed baud rate of 78 Kbps Refer to Section 4115 for LonWorks network variables

Sections 4111 and 4112 contain procedures for electrical connection of the AAON Airflow

Signal Processor to the network and for configuring the required communication parameters

Electrical Connection 4111

The following procedure outlines the steps for installing the interface wiring for network

communication Network wire should be low capacitance shielded 22 or 24 AWG twisted pair

with PVC jacket such as Belden Part numbers 9841 3105A or equivalent

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Verify that the Power Switch (S3) is in the OFF position and install the interface

wiring for Pins 9 and 10 as shown in Figure 7 If multiple AAON Airflow Signal

Processors will be connected to the same network see Figure 8 for connecting

multiple devices For network systems that require all devices to have a common

signal ground refer to Figure 9 for electrical connection The J2 electrical

connector has a removable terminal block for ease of installing the interface

wiring

Step 4 For proper operation of BACnet and Modbus communication networks the

device that is electrically installed at the end of the network may require the

Terminator Switch be moved to the ON position to prevent line and data

reflection If Terminator is required it must be applied to both physical ends of

the network All other devices should have the Terminator Switch in the OFF

position The communication board is located on the back side of the main

AAON Airflow Signal Processor board See Figure 10 below for Terminator

Switch location on the communication board

Step 5 For LonWorks Communication refer to Figure 7 for the location of the Lon

Service Pin

37

Step 6 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 7 Configure the required parameters as outlined in Section 4112

Step 8 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

RP1

S3

NETWORK

COMMUNICATION+

-

LON

SERVICE PIN

Figure 7 - Network Communication Electrical Connection

38

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

AAON AIRFLOW

SIGNAL PROCESSOR

CONNECT ONLY ONE END OF SHIELD

WIRE TO EARTH GROUND AS SHOWN

SET TERMINATOR SWITCH

ON IF REQUIRED

NETWORK

COMMUNICATIONS

NETWORK

CONNECT SHIELD

WIRES TOGETHER

CONNECT SHIELD

WIRES TOGETHER

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not

Requiring Common Signal Grounds

Note If using two conductor communication wire use the shield wire to connect all device signal grounds together as shown in the figure below If using three conductor communication wire use the 3rd conductor to connect all device signal grounds together and connect one side of the shield to earth ground

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

SIGNAL

GROUND

8

J2

SIGNAL

GROUND

8

J28

J2

USE SHIELD WIRE OR 3RD CONDUCTOR TO

CONNECT DEVICE SIGNAL GROUND TO

NETWORK SIGNAL GROUND

SET TERMINATOR SWITCH

ON IF REQUIRED

AAON AIRFLOW

SIGNAL PROCESSOR

NETWORK

COMMUNICATIONS

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

SIGNAL

GROUND

SIGNAL

GROUND

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds

39

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location

COMMUNICATION BOARD ID

BOARD SERIAL NO

40

Parameter Configuration 4112

If BACnet or Modbus communication is ordered the associated settings will need to be

configured with the exception of Modbus communication with WattMaster Controls which has

been configured at the factory To set the parameters refer to the following procedure below

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 41121

through 41124 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

41121 MAC Address (BACnet Communication Option)

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network Each AAON Airflow Signal

Processor must have a unique MAC Address assigned ranging from 2 to 127

Tech Config

Password 1000

4PT Flow Corr MAC Address

MAC Address (Range = 02 to 254)

Instance Number

Modbus ID (002)

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 35: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

35

410 WARNING MESSAGES

Input Pressure Overrange Message 4101

If the input pressure exceeds the entered Operating Range Value the following message will

appear on the display It will alternate between the process display and the error message until

the input falls below the Operating Range Value

- Caution -

Input Beyond

Operating Range

Selected

Transducer Calibration Message 4102

If during a transducer zero or span calibration process the transducer output pressure value

measured exceeds plusmn20 of the expected value the following message will appear on the display

Once the Enter button is pressed the display returns to the previous calibration menu

Value entered is

Outside Factory

set limits

(Press Enter)

Operating Range Message 4103

If the new values entered for Temperature Compensation Area Factor or Altitude (see Sections

487 491 and 494) causes the Operating Range Value to exceed the new calculated

Maximum Full Scale Value the following message will appear on the display

Op Range Outside

Allowable Value

Reset to MAX FS

(Press Enter)

New Operating Range Message 4104

If a user enters a new Operating Range Value the following message will appear on the display

notifying the user that if any 4 PT Flow Correction Values (see Section 497) were previously

entered they will be reset The message allows the user to confirm that the Operating Range

change should be made To complete the Operating Range change the user must use the

UPDown buttons to change the NO to a YES and press the ENTER button

Value will

Reset 4PT

Flow Correction

Values

Make the Change

(NO)

(Press Enter)

36

411 NETWORK COMMUNICATION

The AAON Airflow Signal Processor can be ordered with BACnet Modbus or LonWorks

Communication For BACnet Communication the AAON Airflow Signal Processors utilize

MSTP (Master SlaveToken Passing) BACnet type protocol BACnet is implemented using

EIA-485 signaling standards through a shielded twisted pair wire operating at a baud rate of 96

Kbps to 768 Kbps Each device has a unique MAC Address ranging from 2 to 127 Refer to

Section 4113 for BACnet Protocol Implementation Conformance Statements (PICS) For

Modbus Communication the AAON Airflow Signal Processors utilize the Modbus ndash RTU Slave

protocol using EIA-485 signaling standards through a shielded twisted pair wire operating at a

baud rate of 96 Kbps to 1152 Kbps Each device has a unique Modbus ID ranging from 1 to

254 Refer to Section 4114 for Modbus software configuration parameters For LonWorks

Communication each AAON Airflow Signal Processor has a unique Neuron Chip ID which is

loaded on the network by pressing a service switch located on the main board (see Section

4111 Figure 7) The LonWorks network utilizes a shielded twisted pair wire operating at a

fixed baud rate of 78 Kbps Refer to Section 4115 for LonWorks network variables

Sections 4111 and 4112 contain procedures for electrical connection of the AAON Airflow

Signal Processor to the network and for configuring the required communication parameters

Electrical Connection 4111

The following procedure outlines the steps for installing the interface wiring for network

communication Network wire should be low capacitance shielded 22 or 24 AWG twisted pair

with PVC jacket such as Belden Part numbers 9841 3105A or equivalent

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Verify that the Power Switch (S3) is in the OFF position and install the interface

wiring for Pins 9 and 10 as shown in Figure 7 If multiple AAON Airflow Signal

Processors will be connected to the same network see Figure 8 for connecting

multiple devices For network systems that require all devices to have a common

signal ground refer to Figure 9 for electrical connection The J2 electrical

connector has a removable terminal block for ease of installing the interface

wiring

Step 4 For proper operation of BACnet and Modbus communication networks the

device that is electrically installed at the end of the network may require the

Terminator Switch be moved to the ON position to prevent line and data

reflection If Terminator is required it must be applied to both physical ends of

the network All other devices should have the Terminator Switch in the OFF

position The communication board is located on the back side of the main

AAON Airflow Signal Processor board See Figure 10 below for Terminator

Switch location on the communication board

Step 5 For LonWorks Communication refer to Figure 7 for the location of the Lon

Service Pin

37

Step 6 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 7 Configure the required parameters as outlined in Section 4112

Step 8 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

RP1

S3

NETWORK

COMMUNICATION+

-

LON

SERVICE PIN

Figure 7 - Network Communication Electrical Connection

38

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

AAON AIRFLOW

SIGNAL PROCESSOR

CONNECT ONLY ONE END OF SHIELD

WIRE TO EARTH GROUND AS SHOWN

SET TERMINATOR SWITCH

ON IF REQUIRED

NETWORK

COMMUNICATIONS

NETWORK

CONNECT SHIELD

WIRES TOGETHER

CONNECT SHIELD

WIRES TOGETHER

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not

Requiring Common Signal Grounds

Note If using two conductor communication wire use the shield wire to connect all device signal grounds together as shown in the figure below If using three conductor communication wire use the 3rd conductor to connect all device signal grounds together and connect one side of the shield to earth ground

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

SIGNAL

GROUND

8

J2

SIGNAL

GROUND

8

J28

J2

USE SHIELD WIRE OR 3RD CONDUCTOR TO

CONNECT DEVICE SIGNAL GROUND TO

NETWORK SIGNAL GROUND

SET TERMINATOR SWITCH

ON IF REQUIRED

AAON AIRFLOW

SIGNAL PROCESSOR

NETWORK

COMMUNICATIONS

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

SIGNAL

GROUND

SIGNAL

GROUND

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds

39

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location

COMMUNICATION BOARD ID

BOARD SERIAL NO

40

Parameter Configuration 4112

If BACnet or Modbus communication is ordered the associated settings will need to be

configured with the exception of Modbus communication with WattMaster Controls which has

been configured at the factory To set the parameters refer to the following procedure below

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 41121

through 41124 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

41121 MAC Address (BACnet Communication Option)

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network Each AAON Airflow Signal

Processor must have a unique MAC Address assigned ranging from 2 to 127

Tech Config

Password 1000

4PT Flow Corr MAC Address

MAC Address (Range = 02 to 254)

Instance Number

Modbus ID (002)

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 36: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

36

411 NETWORK COMMUNICATION

The AAON Airflow Signal Processor can be ordered with BACnet Modbus or LonWorks

Communication For BACnet Communication the AAON Airflow Signal Processors utilize

MSTP (Master SlaveToken Passing) BACnet type protocol BACnet is implemented using

EIA-485 signaling standards through a shielded twisted pair wire operating at a baud rate of 96

Kbps to 768 Kbps Each device has a unique MAC Address ranging from 2 to 127 Refer to

Section 4113 for BACnet Protocol Implementation Conformance Statements (PICS) For

Modbus Communication the AAON Airflow Signal Processors utilize the Modbus ndash RTU Slave

protocol using EIA-485 signaling standards through a shielded twisted pair wire operating at a

baud rate of 96 Kbps to 1152 Kbps Each device has a unique Modbus ID ranging from 1 to

254 Refer to Section 4114 for Modbus software configuration parameters For LonWorks

Communication each AAON Airflow Signal Processor has a unique Neuron Chip ID which is

loaded on the network by pressing a service switch located on the main board (see Section

4111 Figure 7) The LonWorks network utilizes a shielded twisted pair wire operating at a

fixed baud rate of 78 Kbps Refer to Section 4115 for LonWorks network variables

Sections 4111 and 4112 contain procedures for electrical connection of the AAON Airflow

Signal Processor to the network and for configuring the required communication parameters

Electrical Connection 4111

The following procedure outlines the steps for installing the interface wiring for network

communication Network wire should be low capacitance shielded 22 or 24 AWG twisted pair

with PVC jacket such as Belden Part numbers 9841 3105A or equivalent

Caution - All electrical connections must be made with the AAON Airflow Signal Processor

Power Switch in the OFF position

Step 1 Remove the corner mounting screws on the AAON Airflow Signal Processor

cover by turning each screw counter clockwise

Step 2 Remove the cover

Step 3 Verify that the Power Switch (S3) is in the OFF position and install the interface

wiring for Pins 9 and 10 as shown in Figure 7 If multiple AAON Airflow Signal

Processors will be connected to the same network see Figure 8 for connecting

multiple devices For network systems that require all devices to have a common

signal ground refer to Figure 9 for electrical connection The J2 electrical

connector has a removable terminal block for ease of installing the interface

wiring

Step 4 For proper operation of BACnet and Modbus communication networks the

device that is electrically installed at the end of the network may require the

Terminator Switch be moved to the ON position to prevent line and data

reflection If Terminator is required it must be applied to both physical ends of

the network All other devices should have the Terminator Switch in the OFF

position The communication board is located on the back side of the main

AAON Airflow Signal Processor board See Figure 10 below for Terminator

Switch location on the communication board

Step 5 For LonWorks Communication refer to Figure 7 for the location of the Lon

Service Pin

37

Step 6 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 7 Configure the required parameters as outlined in Section 4112

Step 8 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

RP1

S3

NETWORK

COMMUNICATION+

-

LON

SERVICE PIN

Figure 7 - Network Communication Electrical Connection

38

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

AAON AIRFLOW

SIGNAL PROCESSOR

CONNECT ONLY ONE END OF SHIELD

WIRE TO EARTH GROUND AS SHOWN

SET TERMINATOR SWITCH

ON IF REQUIRED

NETWORK

COMMUNICATIONS

NETWORK

CONNECT SHIELD

WIRES TOGETHER

CONNECT SHIELD

WIRES TOGETHER

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not

Requiring Common Signal Grounds

Note If using two conductor communication wire use the shield wire to connect all device signal grounds together as shown in the figure below If using three conductor communication wire use the 3rd conductor to connect all device signal grounds together and connect one side of the shield to earth ground

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

SIGNAL

GROUND

8

J2

SIGNAL

GROUND

8

J28

J2

USE SHIELD WIRE OR 3RD CONDUCTOR TO

CONNECT DEVICE SIGNAL GROUND TO

NETWORK SIGNAL GROUND

SET TERMINATOR SWITCH

ON IF REQUIRED

AAON AIRFLOW

SIGNAL PROCESSOR

NETWORK

COMMUNICATIONS

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

SIGNAL

GROUND

SIGNAL

GROUND

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds

39

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location

COMMUNICATION BOARD ID

BOARD SERIAL NO

40

Parameter Configuration 4112

If BACnet or Modbus communication is ordered the associated settings will need to be

configured with the exception of Modbus communication with WattMaster Controls which has

been configured at the factory To set the parameters refer to the following procedure below

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 41121

through 41124 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

41121 MAC Address (BACnet Communication Option)

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network Each AAON Airflow Signal

Processor must have a unique MAC Address assigned ranging from 2 to 127

Tech Config

Password 1000

4PT Flow Corr MAC Address

MAC Address (Range = 02 to 254)

Instance Number

Modbus ID (002)

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 37: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

37

Step 6 Turn the Power Switch (S3) to the ON position see Section 461 and 462 for

display descriptions

Step 7 Configure the required parameters as outlined in Section 4112

Step 8 Replace the cover by turning each corner cover mounting screw clockwise

J1

1 2 3 11 12 13 14 15 16 17 184 5 6 7 8

J3 (ALARM OPTION)J2

ON

OFF

POWER

SWITCH

ENTERESC

109

LON

INPUT

TEMP

mA

V

PROC

OUTPUT

mA

V

10V

5V

S1S2 S4

TEMPERATURE OUTPUT POWER (+ 24VDC)

- TEMPERATURE (GND)

+ TEMPERATURE INPUT

+ NETWORK COMMUNICATION

- NETWORK COMMUNICATION

- ANALOG PROCESS OUTPUT(GND)

+ ANALOG PROCESS OUTPUT

8

10

9

EARTH GROUND

124VAC DC

3

2

J1

4

6

7

5

J2

J3 (ALARM OPTION)

15

17

18

16

11

13

14

12

NC

LOW ALARMNO

NC

COM

PURGE HOLD

HIGH ALARM

COM

NO

RP1

S3

NETWORK

COMMUNICATION+

-

LON

SERVICE PIN

Figure 7 - Network Communication Electrical Connection

38

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

AAON AIRFLOW

SIGNAL PROCESSOR

CONNECT ONLY ONE END OF SHIELD

WIRE TO EARTH GROUND AS SHOWN

SET TERMINATOR SWITCH

ON IF REQUIRED

NETWORK

COMMUNICATIONS

NETWORK

CONNECT SHIELD

WIRES TOGETHER

CONNECT SHIELD

WIRES TOGETHER

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not

Requiring Common Signal Grounds

Note If using two conductor communication wire use the shield wire to connect all device signal grounds together as shown in the figure below If using three conductor communication wire use the 3rd conductor to connect all device signal grounds together and connect one side of the shield to earth ground

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

SIGNAL

GROUND

8

J2

SIGNAL

GROUND

8

J28

J2

USE SHIELD WIRE OR 3RD CONDUCTOR TO

CONNECT DEVICE SIGNAL GROUND TO

NETWORK SIGNAL GROUND

SET TERMINATOR SWITCH

ON IF REQUIRED

AAON AIRFLOW

SIGNAL PROCESSOR

NETWORK

COMMUNICATIONS

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

SIGNAL

GROUND

SIGNAL

GROUND

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds

39

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location

COMMUNICATION BOARD ID

BOARD SERIAL NO

40

Parameter Configuration 4112

If BACnet or Modbus communication is ordered the associated settings will need to be

configured with the exception of Modbus communication with WattMaster Controls which has

been configured at the factory To set the parameters refer to the following procedure below

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 41121

through 41124 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

41121 MAC Address (BACnet Communication Option)

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network Each AAON Airflow Signal

Processor must have a unique MAC Address assigned ranging from 2 to 127

Tech Config

Password 1000

4PT Flow Corr MAC Address

MAC Address (Range = 02 to 254)

Instance Number

Modbus ID (002)

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 38: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

38

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

AAON AIRFLOW

SIGNAL PROCESSOR

CONNECT ONLY ONE END OF SHIELD

WIRE TO EARTH GROUND AS SHOWN

SET TERMINATOR SWITCH

ON IF REQUIRED

NETWORK

COMMUNICATIONS

NETWORK

CONNECT SHIELD

WIRES TOGETHER

CONNECT SHIELD

WIRES TOGETHER

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

Figure 8 - Network Communication Electrical Connection Of Multiple Devices Not

Requiring Common Signal Grounds

Note If using two conductor communication wire use the shield wire to connect all device signal grounds together as shown in the figure below If using three conductor communication wire use the 3rd conductor to connect all device signal grounds together and connect one side of the shield to earth ground

AUTOMATION SYSTEMBUILDING

-

+

109

J2

+ -109

J2109

J2

-+ -+

SIGNAL

GROUND

8

J2

SIGNAL

GROUND

8

J28

J2

USE SHIELD WIRE OR 3RD CONDUCTOR TO

CONNECT DEVICE SIGNAL GROUND TO

NETWORK SIGNAL GROUND

SET TERMINATOR SWITCH

ON IF REQUIRED

AAON AIRFLOW

SIGNAL PROCESSOR

NETWORK

COMMUNICATIONS

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR OFF)

NETWORK

(SET TERMINATOR ON)

AAON AIRFLOW

SIGNAL PROCESSOR

AAON AIRFLOW

SIGNAL PROCESSOR

SIGNAL

GROUND

SIGNAL

GROUND

Figure 9 - Network Communication Electrical Connection Of Multiple Devices Requiring

Common Signal Grounds

39

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location

COMMUNICATION BOARD ID

BOARD SERIAL NO

40

Parameter Configuration 4112

If BACnet or Modbus communication is ordered the associated settings will need to be

configured with the exception of Modbus communication with WattMaster Controls which has

been configured at the factory To set the parameters refer to the following procedure below

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 41121

through 41124 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

41121 MAC Address (BACnet Communication Option)

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network Each AAON Airflow Signal

Processor must have a unique MAC Address assigned ranging from 2 to 127

Tech Config

Password 1000

4PT Flow Corr MAC Address

MAC Address (Range = 02 to 254)

Instance Number

Modbus ID (002)

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 39: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

39

Figure 10 - BACNET amp MODBUS Communication Board Terminator Switch Location

COMMUNICATION BOARD ID

BOARD SERIAL NO

40

Parameter Configuration 4112

If BACnet or Modbus communication is ordered the associated settings will need to be

configured with the exception of Modbus communication with WattMaster Controls which has

been configured at the factory To set the parameters refer to the following procedure below

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 41121

through 41124 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

41121 MAC Address (BACnet Communication Option)

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network Each AAON Airflow Signal

Processor must have a unique MAC Address assigned ranging from 2 to 127

Tech Config

Password 1000

4PT Flow Corr MAC Address

MAC Address (Range = 02 to 254)

Instance Number

Modbus ID (002)

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 40: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

40

Parameter Configuration 4112

If BACnet or Modbus communication is ordered the associated settings will need to be

configured with the exception of Modbus communication with WattMaster Controls which has

been configured at the factory To set the parameters refer to the following procedure below

subsections and Section 463 for Key functions

Step 1 Enter the Tech Configuration Menu by pressing and holding the UpDown

Keys simultaneously for 5 seconds

Step 2 Using the UpDownLeftRight Keys enter password number 1000 and

press the Enter Key

Step 3 Once in the Tech Configuration Menu use the UpDown Keys to highlight

the required parameter for configuration as shown in Sections 41121

through 41124 Press the Enter Key once to access the highlighted

parameter Menu

Step 4 Once in the parameter menu the parameter can be changed using the

UpDownLeftRight Keys After the parameter has been changed press

the Enter Key once Then Press the ESC Key once to return to the Tech

Configuration Menu

Step 5 After all of the required parameters have been configured exit the Tech

Configuration Menu by pressing the ESC Key The Process Display (see

Section 462) will then be displayed

41121 MAC Address (BACnet Communication Option)

When the BACnet Communication option is ordered the MAC Address Menu allows the user to

set a unique device address when connecting to a BACnet network Each AAON Airflow Signal

Processor must have a unique MAC Address assigned ranging from 2 to 127

Tech Config

Password 1000

4PT Flow Corr MAC Address

MAC Address (Range = 02 to 254)

Instance Number

Modbus ID (002)

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 41: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

41

41122 Instance Number (BACnet Communication Option)

When the BACnet Communication option is ordered the Instance Number Menu allows the user

to set a unique device address when connecting to a BACnet network The Instance Number is a

5 digit number identifying the particular network the devices are attached to and can range from

a value of 1000 to 32127 The first 2 digits of the Instance Number identify the particular

network (01 to 32) and the last 3 digits are the devices unique MAC Address It is recommended

for network device organization that the MAC Address and Instance number follow the example

shown below

Tech Config

Password 1000

4PT Flow Corr Instance Number

MAC Address (default = 1002)

Instance Number

Modbus ID (1002)

-INSTANCE NUMBER EXAMPLE-

The following example shows two devices (MAC Address 002 and 003) attached to a network

identified as 01000

Device 1 MAC Address number is 002

Device 1 Instance Number will be 01002

Device 2 MAC Address number is 003

Device 2 Instance Number will be 01003

41123 Modbus ID (Modbus Communication Option)

When the Modbus Communication option is ordered the Modbus ID Menu allows the user to set

a unique device address when connecting to a Modbus network ranging from 1 to 254 The

default is 002 For communication with WattMaster Controls the Modbus ID has been set by the

factory to 009 for outside airflow applications

Tech Config

Password 1000

4PT Flow Corr Modbus ID

MAC Address (Range = 01 to 254)

Instance Number

Modbus ID (002)

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 42: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

42

41124 Baud Rate (Modbus and BACnet Communication Options)

The Baud Rate Menu allows the user to set a unique network baud rate Modbus

communications supports 96 192 384 576 and 1152 Kbps baud rate The current BACnet

protocol supports 96 192 384 and 768 Kbps baud rate The default is 384 Kbps For

communication with WattMaster Controls the Baud Rate has been set by the factory to 96

Kbps For additional information refer to the AAON Outdoor Airflow Measurement System

OampM

Tech Config

Password 1000

Baud Rate Baud Rate

(96 192 384 768)

(384) Kbps

BACnet Protocol Implementation Conformance Statements 4113

Refer to Tables 8 through 10 below for the BACnet Protocol Implementation Conformance

Statements (PICS) and for details on the Standard Object Types Supported

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 43: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

43

Table 8 - BACNET Protocol Implementation Conformance Statements

BACnet Standardized Device Profile (Annex L) BACnet Application Specific Controller (B-

ASC)

BACnet Interoperability Building Blocks

Supported (Annex K)

DS-RP-B

DS-RPM-B

DS-WP-B

DS-WPM-B

DM-RD-B

DM-DDB-B

DM-DOB-B

DM-DCC-B

Segmentation Capability NONE

Standard Object Types Supported

(See Table 9 for details)

Analog Input

Analog Value

Multistate Value

Data Link Layer Options MSTP Master (Clause 9)

Baud Rate(s) 9600 19200 38400 76800

Device Address Binding NO

Networking Options NONE

Character Sets Supported ANSI 34

Supported Services ReadProperty Execute

ReadPropertyMultiple Execute

WriteProperty Execute

WritePropertyMultiple Execute

DeviceCommunicationControl Execute

Who-Is Initiate

Execute

Who-Has Execute

I-Am Initiate

Execute

I-Have Execute

Gateway This product does not support gateway

functionality for any types of non-BACnet

equipmentnetwork(s)

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 44: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

44

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Device No No Object Name

Description

Location

Object Identifier

APDU Timeout

Max Info Frames

Max Master

Description

Location

Analog Input 1

Pressure

No No Description

Eng Units

Read Only REAL

Analog Input 2

Flow

No No Description

Eng Units

Read Only REAL

Analog Input 3

Temperature

No No Description

Eng Units

Present

Value

REAL

Analog Value 1

Pressure Operating

Range

No No Description Present

Value

REAL

Analog Value 2

Pressure Hi Alarm

No No Description Present

Value

REAL

Analog Value 3

Pressure Lo Alarm

No No Description Present

Value

REAL

Analog Value 4

Flow Operating Range

No No Description Present

Value

REAL

Analog Value 5

Flow Hi Alarm

No No Description Present

Value

REAL

Analog Value 6

Flow Lo Alarm

No No Description Present

Value

REAL

Analog Value 7

Hi Alarm Delay

No No Description Present

Value

Unsigned

Integer

Analog Value 8

Lo Alarm Delay

No No Description Present

Value

Unsigned

Integer

Multistate Value 1

Hi Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 45: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

45

Table 9 - Standard Object Types Supported

Object

Create

Object

Service

Delete

Object

Service

Optional

Properties

Supported

Writeable

Properties

Property

Data

Type

Data Value

Description

(State_Text)

Multistate Value 2

Hi Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 3

Lo Alarm Enable

No No Description Present

Value

Unsigned

Integer 1 = Disable

2 = Enable

Multistate Value 4

Lo Alarm Status

No No Description Read Only Unsigned

Integer

1 = No

Alarm

2 = Alarm

Multistate Value 5

Engineering Units

No No Description Present

Value

Unsigned

Integer See Table 10

Multistate Value 6

Temperature Units

No No Description Present

Value

Unsigned

Integer

1 =

Fahrenheit

2 = Celsius

Multistate Value 7

Temperature Source

No No Description Present

Value

Unsigned

Integer

1 = Temp

Input

2 = Fixed

Temp

3 = Network

Multistate Value 8

Process Type

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Pressure

Multistate Value 9

Process Unit

No No Description Read Only Unsigned

Integer 1 = Flow

2 = Velocity

Multistate Value 10

Flow Type

No No Description Read Only Unsigned

Integer 1 = Actual

2 = Standard

Note All BACnet required properties are supported Table 9 above lists optional amp writable

properties supported

Table 10 - Multistate Value 5 Engineering Units State_Textlist

Flow

Multistate Value 8 = 1

Multistate Value 9 = 1

Velocity

Multistate Value 8 = 1

Multistate Value 9 = 2

Pressure

Multistate Value 8 = 1

Multistate Value 9 = 1

1 = CFM

2 = LS

3 = msup3S

4 = msup3HR

5 = (Flow )

1 = FPM

2 = ms

3 = (Velocity )

1 = Inch WC

2 = Pa

3 = KPa

4 = mm WC

5 = (Pressure )

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 46: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

46

Modbus Software Configuration Parameters 4114

Refer to Tables 11 through 13 below for the Modbus Software Configuration Parameters and

Modbus Devise Objects If the query sent by the Master host has errors in it the AAON Airflow

Signal Processor will respond with Error Codes as listed in Table 14

Table 11 -MODBUS Software Configuration Parameters

Communication Type Serial

Protocol RTU - Slave

Modbus ID First device starts at 1 and increments up to

254

Baud Rate 96 Kbps 192 Kbps 384 Kbps (Default)

576 Kbps amp 1152 Kbps

Data Bits 8

Parity NONE

Stop Bit 1

Flow Control NONE

Time Out 150 msec (minimum)

Poll Time 100 msec (minimum)

Address Type Decimal 40000 ndash 40999 (Holding Register

Address)

Byte Order Motorola (Default)

High Byte Bits 15 ndash 8

Low Byte Bits 7 - 0

Start Address 0-based

Max Block Size

(Holding Registers)

8

Function Code (03X) Read Registers

(06X) Write Single Register

(10X) Write Multiple Register

Notes

1 When using a USB to RS-485 converter make sure to set Echo to OFF

2 The AAON Airflow Signal Processorrsquos Modbus protocol supports the ldquoBroadcasting

Addressrdquo function This function allows for writing to multiple devices at one time

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 47: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

47

Table 12 - MODBUS Device Objects

Item Description

Register

Number CC

Data

Type Data Value Descriptions

1 Pressure Input 40369 R Signed Short

2 Flow Input 40370 R Signed Long

3 Temperature Value 40459 W Signed Short To write a temperature

value from the network set

ldquoTemperature Sourcerdquo data

value to 2 (Network) See

Item 20 below

4 Temp Fixed Value 40457 W Signed Short

5 Pressure Operating Range 40359 R Signed Short

6 Pressure High Alarm Value 40424 W Signed Short

7 Pressure Low Alarm Value 40425 W Signed Short

8 Flow Operating Range 40362 R Signed Long

9 Flow High Alarm Value 40416 W Signed Long

10 Flow Low Alarm Value 40418 W Signed Long

11 Process Type 40150 R Word 0 = Flow

1 = Pressure

12 High Alarm Enable 40430 W Word 0 = Off

1 = On

13 High Alarm Delay 40428 W Word 0 to 999 seconds

14 High Alarm Out 40081 R Word 0 = No Alarm

1 = Alarm

15 Low Alarm Enable 40431 W Word 0 = Off

1 = On

16 Low Alarm Delay 40429 W Word 0 to 999 Seconds

17 Low Alarm Out 40080 R Word 0 = No Alarm

1 = Alarm

18 Engineering Unit 40128 R Word See Table 13 below

19 Temperature Unit 40450 W Word 0 = degF

1 = degC

20 Temperature Source 40455 W Word 0 = Variable

1 = Fixed

2 = Network

21 Decimal Point 40133 R Word 1 = XXXX

2 = XXXX

3 = XXXX

4 = XXXX

Notes

In the CC column an R denotes a Read Only object and a W denotes a ReadWrite

object

The AAON Airflow Signal Processor responds to a read request from the master for these

parameters by sending the value of these parameters without any decimal points It is

important that the Modbus software that reads these parameters must also read the

decimal point information or the programmer must set it manually in the software to

display the value correctly

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 48: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

48

Table 13 -Engineering Unit Data Value Descriptions

Actual Flow Standard Flow Actual Velocity Standard Velocity Pressure

0 =ACFM

1 = LS

2 = Am3S

3 =

0 = SCFM

1 = SCFH

2 = SLS

3 = Sm3S

4 = Sm3HR

5 =

0 = AFPM

1 = AmS

2 =

0 = SFPM

1 = SmS

2 =

0 = Inch wc

1 = Pa

2 = KPa

3 = mm wc

4 =

Table 14 -MODBUS Exception Codes

Error Code Error Type

01H Function Code Error

A function code other than 03H 06H or 10H has been set by the master

02H Invalid Register Number Error

The register address you are attempting to access is not allowed in the signal

processor 03H Invalid Quantity Error

The number of data packets (Blocks) being read or written is larger than 8

In write mode the number of data packets in the message is not No of packets x

2 21H Data Setting Error

Attempted to write beyond registerrsquos data limits

22H Write-in Error

Register is Read Only

LonWorks Network Variables 4115

Identification of the LonWorks Module is listed Table 15 The AAON Airflow Signal Processor

transmits LonWorks data in f US format If the values transmitted are incorrect the user may

need to convert the data from f US format to f SI format Network variables are shown in

Table 16

Table 15 -Identification Of LONWORKS Module

Program ID 8000E20A5A040490

Manufacture ID E2

Category Sensors

Device Class Multi-Function Sensors

Usage Industrial Commercial

Model Number 90

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 49: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

49

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

1 Pressure Process Value nvoPressure_PV SNVT_press_f Pascal Inch

WC

2 Flow Process Value nvoFlow_PV SNVT_flow_f LiterSec ft3min-

CFM

3 Velocity Process Value nvoVelocity_PV SNVT_speed_f MeterSec ftmin-

FPM

4

Process Value in

Percentage for Flow

Velocity or Pressure

nvoPercentage_PV SNVT_lev_percent

5 Temperature Process

Value Analog Input nviTemp_PV SNVT_temp degC degF

6 Temperature Process

Value Fixed nvoTemp_PV SNVT_temp degC degF

7 High Alarm Enable nciLoAlEnb SCPTlowLimit1Enable Bool

8 Low Alarm Enable nciHiAlEnb SCPThighLimit1Enable Bool

9 Low Alarm Status nvoLoAlarmStatus SNVT_state_64

10 High Alarm Status nvoHiAlarmStatus SNVT_state_64

11

Pressure Operating

Range nciPressure_OP SNVT_press_f Pascal

Inch

WC

12 Flow Operating Range nciFlow_OP SNVT_flow_f LiterSec

ft3min-

CFM

13

Velocity Operating

Range nciVelocity_OP SNVT_speed_f MeterSec

ftmin-

FPM

14

Pressure Low Alarm

Limit nciPrssure_LoAl SNVT_press_f Pascal

Inch

WC

15 Flow Low Alarm Limit nciFlow_LoAl SNVT_flow_f LiterSec

ft3min-

CFM

16

Velocity Low Alarm

Limit nciVelocity_LoAl SNVT_speed_f MeterSec

ftmin-

FPM

17

Pressure High Alarm

Limit nciPressure_HiAl SNVT_press_f Pascal

Inch

WC

18 Flow High Alarm Limit nciFlow_HiAl SNVT_flow_f LiterSec

ft3min-

CFM

19

Velocity High Alarm

Limit nciVelocity_HiAl SNVT_speed_f MeterSec

ftmin-

FPM

20 Low Alarm Delay nciLoAlDly SCPTlowLimDly Sec

21 High Alarm Delay nciHiAlDly SCPThighLimDly Sec

22 Flow Calculation

Method

ncoCalcMet UCPT_CalcMet Enumeration

23 Network Temperature =

2

nciTempSrc UCPT_TempSource Enumeration

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 50: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

50

Table 16 -LONWORKS Network Variables

Description LonWorks Name

LonWorks Network

Variable

Default Eng

Unit (SI)

US

Eng

Unit

24 Major Soft Version ncoSorfMajVer SCPTdevMajVer

25 Minor Soft Version ncoSoftMinVer SCPTdevMinVer

Table 17 - Network Variable Types

Network Variable Formats User Defined Formats

SNVT_press_f SNVT_press_fSI text(f)

SNVT_press_fSI_kPa text(f

0001+0(0973))

SNVT_press_fUS text(f

00040217+0(0954))

SNVT_press_fUS_psi text(f

14504e-4+0(0875))

SNVT_press_fSI_mmWC

text(f 0101967+0(54))

mm of H2O

SNVT_flow_f SNVT_flow_fSI text(f)

SNVT_flow_fUS text(f

21189+0(0966))

SNVT_flow_fUS_liq text(f

026418+0(0837))

SNVT_flow_fSI_cfh

text(f 1271328+0(51))

cu fthr

SNVT_flow_fSI_cms

text(f 0001+0(52))

cu msec

SNVT_flow_fSI_cmh

text(f 36+0(53)) cu

mhr

Notes

1 Information taken from typeslonmarkorg

2 User defined formats are added in STANDARDfmt file

Table 18 - Configuration Property

Network Variable Variable Description

Data Value

Description

UCPT_CalcMet While the AAON Airflow Signal Processor is in Flow or

Velocity mode variable shows the FlowVelocity

calculation method

0 = Actual

1 = Standard

UCPT_TempSource Temperature source configuration property shows the

temperature sensor status

0 = Variable

Temp_Input

1 = Fixed Temp_

2 = Network

Temp_Input

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 51: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

51

412 TROUBLESHOOTING

A Trouble shooting table for the base unit is included in Section 4121 Trouble shooting tables

for the communication options are included in Sections 4122 through 4124

Base Unit 4121

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

1 No Display or Back Light 1 Verify ONOFF switch is in ON position (see

Figure 3 in Section 44)

2 Verify correct input power and connection at 3 pin

connector J1 (see Figure 3 in Section 44)

3 Contact Factory Service Department

2 Display background is too dark or

characters are too light 1 Adjust RP1 Display potentiometer located in the

upper left hand corner of the board (See Section

463)

3 Display does not respond to input

pressure changes and Key pad

functions

1 Reset the unit by turning the ONOFF switch OFF

and back ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

4 Display does not respond to input

pressure changes but does respond to

Key pad functions

1 Verify pneumatic input lines are not reversed at the

Signal Processor ports or the sensing element (see

Figure 5 in Section 44)

2 Use a pneumatic gauge to measure the pneumatic

signal input to the Signal Processor Verify the

signals are within the Operating Range of the

AAON Signal Processor (see Section 481)

3 Contact Factory Service Department

5 Display does not respond to Key Pad

functions 1 Reset the unit by turning the ONOFF switch to

OFF and then ON (see Figure 3 in Section 44)

2 Contact Factory Service Department

6 CAUTION INPUT OVERRANGE

message on Display 1 Verify the Operating Range of the AAON Signal

Processor (see Section 481) is correct for the

application

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 52: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

52

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

2 Remove pneumatic signal lines If display returns

to 0 reading use a pneumatic gauge to measure the

pneumatic signal Verify input signal is equal to or

less then the Operating Range of the AAON Signal

Processor (see Section 481) If the display does

not return to 0 a pneumatic tube may be plugged

by moisture underneath the PC board Consult the

factory

3 Verify menu selections are set correctly

Operating Range Flow Correction Temperature

Compensation Area Factor and Altitude

4 Verify that the temperature input is connected

correctly (see Section 33) Verify correct

temperature input signal (see Section 452)

5 Contact Factory Service Department

7 Incorrect Temperature Reading 1 Verify correct temperature input signal (see

Section 452)

2 Verify Temperature Transmitter is connected

correctly to the Signal Processor (see Section 33)

3 Contact Factory Service Department

8 No Output signal or Incorrect Output

signal Display is reading correct

value

1 Verify Process Output S2 amp S4 switches are in the

correct position for the application (see Section

451 and Figure 3 in Section 44)

2 Disconnect Output signal wires and verify output

signal at Signal Processorrsquos connector J2 is correct

3 Verify correct Operating Range (see Section 481)

4 Perform Process Output Calibration (see Section

495)

5 Contact Factory Service Department

9 Incorrect Process Output Values after

changing Area Factor Altitude or

Temperature Value Display readings

are correct

1 Re-Enter Operating Range Value in Field Menu

(see Section 481)

2 Contact Factory Service Department

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 53: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

53

Table 19 -Base Unit Troubleshooting Table

Symptom Solution

10 Unstable Display and Process Output

at very low flow

1 Increase Display and Process Filter (see Sections

488 and 489)

2 Decrease Lockdown Value (see Section 4841)

3 Increase Lockdown Delay Value (see Section

4842)

4 Contact Factory Service Department

11 ldquoAZ Errorrdquo text on display 1 Turn Power Switch S3 OFF and ON to reset the AutoZero valve (see Figure 3 in Section 44)

2 Check for a pinched tube beneath the main board

(Caution Remove power before removing board)

3 Contact Factory Service Department

BACnet Communication Option 4122

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify each device has a unique MAC Code and

the Instance Number includes the MAC Code

number Example Instance Number = 01002

MAC Code = 002 (see Sections 41121 and

41122)

2 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Contact Factory Service Department

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 54: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

54

Table 20 -BACNET Communication Troubleshooting Table

Symptom Solution

2 Building Management System

communicating with some devices but

not others

1 Verify each device has a unique MAC Code and

the Instance number includes the unique MAC

Code number Example Instance Number =

01002 MAC Code = 002 (see Sections 41121

and 41122)

2 Verify data + amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

3 Verify the communications Baud Rate is set the

same for all devices (see Section 41124)

4 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Contact Factory Service Department

3 A device on the trunk stops

communicating

1 Try setting the Terminator Switch (located on the

BACnet communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

2 Verify jumper is making contact by measuring

resistance between network wires If connection is

made the resistance will be approx 200 ohms and

if connection is not made the resistance will be

approx 75K ohms

3 Contact Factory Service Department

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 55: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

55

Modbus Communication Option 4123

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the AAON

Airflow Signal Processors

1 Verify each AAON Airflow Signal Processor has a

unique Modbus ID number (see Section 41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify Modbus Software Configuration Parameters

(see Section 4114)

4 Verify data + amp - connections on all AAON

Airflow Signal Processor devices are wired

correctly to the Building Management System (see

Figures 7 through 9 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

6 Contact Factory Service Department

2 Building Management System

communicating with some AAON

Airflow Signal Processors but not

others

1 Verify each AAON Airflow Signal Processor has

a unique Modbus ID number (see Section

41123)

2 Verify the AAON Airflow Signal Processors Baud

Rate matches the Building Management System

Baud Rate requirement (see Section 41124)

3 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

4 Try setting the Terminator Switch (located on the

Modbus communication board) on the last device

in the communication chain to the ON position

(see Figures 8 through 10 in Section 4111)

5 Check Exception Codes (see Table 14 in Section

4114)

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 56: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

56

Table 21 -MODBUS Communication Troubleshooting Table

Symptom Solution

6 Verify Modbus board is installed and seated

correctly Modbus board is located on the back

side of the main board

7 Contact Factory Service Department

3 Query sent by the Master host has

errors in it

1 Check Exception Codes (see Table 14 in Section

4114)

LonWorks Communication Option 4124

Table 22 - LONWORKS Communication Troubleshooting Table

Symptom Solution

1 Building Management System not

communicating with any of the

devices

1 Verify data + amp - connections on all devices and

the Building Management System are wired

correctly (see Figures 7 through 9 in Section

4111)

2 Contact Factory Service Department

2 Building Management System

communicating with some devices but

not others

1 Verify data +amp - wires are connected correctly on

those devices not communicating (see Figures 7

through 9 in Section 4111)

2 Contact Factory Service Department

3 Lon reading incorrect values due to

incorrect data format

1 Select the incorrect value and change the units

from fUS to fSI (see Section 4115)

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability

Page 57: AAON Outdoor Airflow Measurement System - AAON... · The AAON Outdoor Airflow Measurement System includes an airflow station, airflow signal processor, and temperature transmitter

Copyright copy AAON all rights reserved throughout the world

AAONreg and AAONAIREreg are registered trademarks of AAON Inc Tulsa OK

AAON

2425 South Yukon Ave

Tulsa OK 74107-2728

wwwaaoncom

AAON Outdoor Airflow Measurement System

Operation amp Maintenance Manual

V50950 Rev A 160929

Factory Technical Support 918-382-6400 Note Before calling Technical Support please have the model and serial number

of the unit available

Parts For replacement parts please contact your local AAON Representative

It is the intent of AAON to provide accurate and current product information However in the interest of

product improvement AAON reserves the right to change pricing specifications andor design of its

product without notice obligation or liability