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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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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
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