Survey Technical Manual v 1.0

Manual code 75807107A.0909

“ORIGINAL VERSION”

SURVEY

Microprocessor control

Technical manual

Software Version 1.0

SURVEY Microprocessor Control

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CONTENTS

1 INTRODUCTION 5 1.1 GENERAL INFORMATION AND SOFTWARE FUNCTIONS 5

2 DESCRIPTION OF INPUTS-OUTPUTS ON SURVEY 6

3 LOCAL OR REMOTE USER TERMINAL 7 3.1 LOCAL OR REMOTE USER TERMINAL 7

3.1.1 LOCAL OR REMOTE USER INTERFACE LEDS 7

4 USING THE CONTROL SOFTWARE 8 4.1 MODIFYING THE CONTROL PARAMETERS 8

4.1.1 ACCESSING THE MAIN MENU 8 4.1.2 ACCESSING THE PARAMETERS FOR NON-PROTECTED LOOPS 8 4.1.3 ACCESSING THE PARAMETERS FOR PROTECTED LOOPS 8 4.1.4 EXITING THE SCREENS, LOOPS AND MAIN MENU 8

5 CONTROL SOFTWARE MAIN MENU 9 5.1 LOOP SETPOINT 9 5.2 UNIT STATUS LOOP 9 5.3 LOOP MAINTENANCE 9 5.4 PARAMETERS LOOP 9 5.5 CLOCK LOOP 9 5.6 INFO LOOP 9

6 DESCRIPTION OF THE CONTROL SOFTWARE PARAMETERS 10 6.1 SETPOINT LOOP: MODIFYING THE SETPOINTS 10 6.2 USER SETUP LOOP: SETTING THE OPERATING PROGRAM 10

6.2.1 VENTILATION 10 6.2.2 ROOM TEMPERATURE 10 6.2.3 ROOM HUMIDITY 10 6.2.4 SUPPLY TEMPERATURE 10 6.2.5 PROBE CALIBRATION 11 6.2.6 LAN TEST 11 6.2.7 EXTERNAL SUPERVISOR 11 6.2.8 PASSWORD 11

6.3 MANUFACTURER SETUP LOOP: CONFIGURATION OF THE COMPONENTS 12 6.3.1 PROBE PRESENCE 12 6.3.2 PROBE TYPE 12 6.3.3 VENTILATION 12 6.3.4 COOLING SETUP 12 6.3.5 DIRECT EXPANSION 13 6.3.6 HEATING SETUP 13 6.3.7 HUMIDITY SETUP 13 6.3.8 SETPOINT LIMITS 13 6.3.9 REGULATION DEAD ZONE 13 6.3.10 LAN SETUP 14 6.3.11 ALARM DELAY 14 6.3.12 PASSWORD 14

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7 MEANING OF THE ALARM SCREENS 15 7.1 RESETTING THE BUZZER 15 7.2 ALARM CONDITION CHECK 15 7.3 RESETTING AN ALARM 15 7.4 TABLE OF ALARMS 16

8 SERIAL COMMUNICATION AND SUPERVISORY/BMS SYSTEMS 17 8.1 SERIAL COMMUNICATION 17 8.2 SUPERVISORY SYSTEMS 17 8.3 BMS SYSTEMS 17 8.4 MICROPROCESSOR CONTROL ACCESSORIES 18

8.4.1 MODBUS® SERIAL CIRCUIT BOARD RS485 18 8.4.2 SERIAL CIRCUIT BOARD CONNECTION 19

8.5 SERIES C SURVEY SUPERVISOR MICROPROCESSOR VARIABLES (SOFTWARE VERSION 1.0) 20

9 SURVEY DEVICE TROUBLESHOOTING 24 9.1 THE UNIT DOES NOT START 24 9.2 INCORRECT READING OF INPUT SIGNALS 24 9.3 QUESTIONABLE ALARM SIGNALLING FROM DIGITAL INPUT 24 9.4 THE SURVEY DEVICE REPEATEDLY PROCEEDS IN WATCHDOG MODE, 24 9.5 SERIAL CONNECTION WITH THE SUPERVISOR/BMS DOE NOT WORK 24

10 GLOSSARY 25

11 NOTES 26


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IMPORTANT WARNINGS

The equipment described in this manual has been constructed to operate without risk for the intended purposes, provided that:

• Appliance installation, connection, operation and maintenance is carried out by qualified personnel in accordance with the instructions contained in these manuals.

• All the conditions stipulated in the user manual of the unit microprocessor are observed.

Any other use or modification of the equipment, unless expressly authorised by the manufacturer, is deemed improper.

Any injuries or damage sustained as a result of improper use shall be the sole responsibility of the user.

THE INSTRUCTIONS IN THIS MANUAL ENABLE ADEQUATE MANAGEMENT BY THE USER AND GUARANTEE EFFICIENT UNIT OPERATION.

FOR MORE DETAILED INSTRUCTIONS, REFER TO THE TECHNICAL MANUALS PROVIDED IN THE I.T. MEDIA SUPPLIED WITH

THE UNIT.

WARRANTY

TECNAIR LV air conditioners are subject to the following warranty conditions which are automatically deemed to have been understood and accepted by the customer at the time of placing the order.

TECNAIR LV guarantees that the products supplied are well made and of good quality. It undertakes during the period of

warranty specified herein to repair or to replace with new at its own discretion, in the shortest time possible, any parts found to present recognised defects in materials, construction or workmanship that render them unfit for the intended use, provided that these faults are not the result of negligence on the part of the purchaser, neglect or inexperience of the user, normal wear and tear, damage caused by third parties, acts of God or other causes not arising from manufacturing defects. TECNAIR LV, however, shall not be liable to compensation for direct or indirect damage of any nature incurred for any reason.

Defective components will be replaced at the Uboldo manufacturing plant, and all transportation and replacement costs shall

be borne by the Purchaser. The duration of the warranty is 2 (two) years from the date of consignment. The warranty shall be rendered void automatically

if the equipment is repaired or modified or in any way completed (such as, for example, in the case of non-supply of an electrical panel or similar) or in the case of the installation of non-original parts (parts not supplied by TECNAIR LV).

The above warranty conditions apply provided that the Purchaser has fulfilled all contractual obligations and in particular those

regarding payment.

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1 INTRODUCTION 1.1 GENERAL INFORMATION AND SOFTWARE FUNCTIONS

The program controls direct expansion (A) or chilled water (C) series C air conditioning units for sanitary environments.

The main functions of the program are as follows:

FUNCTION DESCRIPTION

Temperature control using P, PI or PID system.

Return humidity control using Proportional system. Regulation

Supply temperature limit control.

Supply fan ON/OFF or variable control via PWM signal.

Control of 1 or 2 Scroll compressors on 1 or 2 circuits. Compressors

Variable Hot Gas Injection control 0/10 V for cooling power regulation.

Cooling valve and Heating valve Floating valves, 3-point or variable at 0/10 V.

Electric heaters 1- or 2-stage control, or variable at 0/10 V.

Humidifier Control signal variable at 0/10V.

Motorised dampers ON/OFF control signal.

Management of Flood Alarms.

Management of Fire/Smoke Alarms.

Mangement of Return Air Filter Alarm. Alarms

Management of Component Alarms, Alarm Logging, Breakdown Signalling.

Maximum number of units: 12.

Rotation for balancing unit operating hours. CANbus Local Network

Switching on the backup unit to compensate for any excess thermal load, or following an alarm event (support procedure).

Modbus network Modbus RTU slave on RS485.

IMPORTANT - WARNING:

TO PREVENT ANY TAMPERING WHICH MAY COMPROMISE UNIT OPERATION,

ONLY AUTHORISED PERSONNEL SHOULD HAVE ACCESS TO THE UNITS


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2 DESCRIPTION OF INPUTS-OUTPUTS ON SURVEY

The functions of the inputs and outputs on the main SURVEY board, designed for series C air conditioners, are listed below.

ANALOGUE INPUTS

No. TYPE DESCRIPTION

AI 1 (DI9) ON-OFF Humidifier General Alarm AI 2 (DI 10) ON-OFF Flooding Alarm AI 3 (DI 11) ON-OFF Fire/Smoke Alarm AI 4 (DI 12) ON-OFF Dirty Filter Alarm

AI 5 0-1 V Room Humidity AI 6 NTC Room Temperature AI 7 NTC Supply Temperature

AI 8 0-5 V Supply Pressure Sensor

DIGITAL INPUTS


DI 1 N.C. General Supply Fans DI 2 N.C. General Electric Heater DI 3 N.O. Motorised Dampers Status DI 4 N.C. Remote OFF DI 5 N.C. Low Pressure Compressor 1 DI 6 N.C. Low Pressure Compressor 2 DI 7 N.C. Compressor 1 General (Compressor High pressure+Thermal)

DI 8 N.C. Compressor 2 General (Compressor High pressure+Thermal)

DIGITAL OUTPUTS


DO 1 N.O. Fans Control DO 2 N.O. Dampers Control DO 3 N.O. Opens 3P cooling valve / Compressor 1 DO 4 N.O. Closes 3P cooling valve / Compressor 2 DO 5 N.O. Opens 3P heating valve / Stage of El. Heat. 1 DO 6 N.O. Closes 3P heating valve / Stage of El. Heat. 2 DO 7 N.O. Non-critical Alarm

DO 8 N.O. Serious Alarm

ANALOGUE OUTPUTS

No. TYPE DESCRIPTION AO 1 PWM Supply Fans Speed Control AO 2 PWM Variable Heating Valve AO 3 0-10 V Cooling Valve AO 4 0-10 V External Humidifier

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3 LOCAL OR REMOTE USER TERMINAL 3.1 LOCAL OR REMOTE USER TERMINAL

KEY NAME DESCRIPTION

UP Scrolls upwards through the screens associated with a specific group; if the cursor is in a setting

field, it enables the user to increase the value.

DOWN Scrolls downwards through the screens associated with a specific group; if the cursor is in a

setting field, it enables the user to decrease the value.

EXIT If pressed, enables exit from the menus and parameter modification procedures.

ON-OFF Enables the user to turn the unit on and off.

ALARM Displays the alarms on screen and enables alarm BUZZER shutoff and active alarm reset.

ENTER Used to move the cursor to the setting fields. In the setting fields it confirms the set value and moves to the next parameter.

MENU If pressed and held, enables access to the Main display menu showing the machine status, control sensor readings and operating mode.

UP + DOWN If pressed and held, can be used to unlock the display keypad.

3.1.1 LOCAL OR REMOTE USER INTERFACE LEDS

A green led is located next to each key, indicating the specific parameter group selected during the display and modification of operating parameters. There are also several LEDs with special functions as shown in the tables below.

KEY COLOUR DESCRIPTION

GREEN

Off: Unit OFF.

On: Unit ON.

Flashing: Unit turned off from remote control or due to serious alarm/Unit in standby.

RED On: Presence of one or more alarm conditions.

ORANGE Instrument powered correctly.


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4 USING THE CONTROL SOFTWARE

The user terminal display shows all information required for precise and comprehensive control. The display of all parameters, both read-only and modifiable, is organised as follows:

1. The main MENU contains LOOPS which group the parameters which must be displayed by category.

2. The LOOPS are divided into 2 categories:

• LOOPS NOT PROTECTED by a password: these display the values of the sensors, alarms, device operating hours, the time and date, and enable the entry of temperature and humidity setpoints and adjustment of the internal clock.

• LOOPS PROTECTED by a password: these enable setting of the main functions (times, differentials, etc.) for the connected devices.

3. Each LOOP contains a series of SCREENS which are used to display or modify the parameters.

4.1 MODIFYING THE CONTROL PARAMETERS 4.1.1 ACCESSING THE MAIN MENU

To access the MENU, simply press and hold the ENTER key ( ). It is possible to scroll through the LOOPS for the MENU using the ARROW keys ( ). 4.1.2 ACCESSING THE PARAMETERS FOR NON-PROTECTED LOOPS

To access the parameters for the non-protected LOOPS, simply press the ENTER key ( ). It is possible to scroll through the SCREENS for the non-protected LOOPS using the ARROW keys ( ). Whenever

the SCREEN has a modifiable parameter (e.g. password, setpoint,…), if ENTER is pressed ( ) the available field is highlighted. The ARROW keys ( ) can be used to modify the field.

To memorise the entered value, simply press ENTER ( ). Following this procedure, the field will no longer be highlighted

and it will once again be possible to scroll through the SCREENS using the ARROW keys ( ). On the other hand, if you do not wish to save the parameter, simply press the EXIT key ( ). Following this procedure,

the field will no longer be highlighted and it will once again be possible to scroll through the SCREENS using the ARROW keys ( ).

4.1.3 ACCESSING THE PARAMETERS FOR PROTECTED LOOPS To access the parameters for the protected LOOPS (user and manufacturer), it will be necessary, in the

PARAMETERS LOOP, to enter the correct LOGIN password:

USER PARAMETERS: Password 0123 (Modifiable)

MANUFACTURER PARAMETERS: Password 0694 (Modifiable)

4.1.4 EXITING THE SCREENS, LOOPS AND MAIN MENU It is possible to exit the SCREENS, the LOOPS and the MENU by pressing the EXIT key ( ).

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5 CONTROL SOFTWARE MAIN MENU 5.1 LOOP SETPOINT

Within the LOOP SETPOINT, it is possible to modify the room temperature and room humidity control setpoints. These parameters can be modified so that the user is able to select his/her preferred environmental conditions.

5.2 UNIT STATUS LOOP Within the UNIT STATUS LOOP, it is possible to display the status of all the control components installed inside the unit. It is

also possible to display the LAN status. The Loop is divided into the following sub-groups:

COMPONENT STATUS: Status of the unit components.

NET STATUS: Status of the units in the LAN. 5.3 LOOP MAINTENANCE

Within LOOP MAINTENANCE it is possible to display the working hours of the main unit components. It is also possible to display the log of alarms which have occurred. The Loop is divided into the following sub-groups:

WORKING HOURS: Working hours count for the main unit components.

ALARMS LOGGING: Log of the alarms which have occurred.

5.4 PARAMETERS LOOP

Within the PARAMETERS LOOP, after gaining access by entering the correct login password, it is possible to modify the parameters corresponding to unit control and the parameters corresponding to unit construction. The Loop is divided into the following sub-groups:

LOGIN: Selection of the access password for the parameter configuration Loops.

USER SETUP: Modification of the unit control and operation parameters.

LANGUAGES: Enables the software language to be changed.

MANUFACTURER SETUP: Deletes the working hours count and the alarms log.

DELETE LOGGING: Can be used to delete the working hours count and the alarms log.

5.5 CLOCK LOOP

Within the CLOCK LOOP, it is possible to adjust the current time and date of the control software.

5.6 INFO LOOP Within the INFO LOOP, it is possible to display the information corresponding to the control software and the unit order

confirmation.

For more detailed and specific information on control procedures, please refer to the unit INSTALLATION, OPERATION AND MAINTENANCE MANUAL accompanying the IT media

supplied.


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6 DESCRIPTION OF THE CONTROL SOFTWARE PARAMETERS

6.1 SETPOINT LOOP: MODIFYING THE SETPOINTS

NAME DESCRIPTION MIN MAX DEFAULT U.M. NEW

S01 Temperature Setpoint r01 r02 22.0 °C

S02 Humidity Setpoint r03 r04 50.0 Rh%

6.2 USER SETUP LOOP: SETTING THE OPERATING PROGRAM

6.2.1 VENTILATION


SP1 Air Flow 500 99000 1500 m3/h

SP2 Pressure 100 900 350 Pa 6.2.2 ROOM TEMPERATURE


T01 Proportional Band 0.1 20.0 2.0 °C

T02 Integral Time 0 9999 0 S

T03 Derivative Time 0 9999 0 S

T04 High Temperature Alarm Offset -20.0 20.0 10.0 °C

T05 Low Temperature Alarm Offset -20.0 20.0 10.0 °C

6.2.3 ROOM HUMIDITY


U01 Proportional Band 1 50 10 Rh%

U02 High Humidity Alarm Offset 0 100 20 Rh%

U03 Low Humidity Alarm Offset 0 100 20 Rh%

6.2.4 SUPPLY TEMPERATURE


TM1 High Supply Temperature Limit -15.0 90.0 30.0 °C

TM2 High Supply Temperature Mode Alarm Only Cooling Procedure Alarm Only

TM3 Low Supply Temperature Limit -15.0 90.0 5.0 °C

TM4 Low Supply Temperature Mode Alarm Only Heating Procedure Alarm Only

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6.2.5 PROBE CALIBRATION


CA1 Room Temperature -10.0 10.0 0.0 °C

CA2 Room Humidity -10 10 0 Rh%

CA3 Supply Temperature -50.0 500.0 0.0 °C

CA4 Supply Pressure Sensor 0 100 0 Pa 6.2.6 LAN TEST


TNT LAN Rotation Test Enable NO YES NO - 6.2.7 EXTERNAL SUPERVISOR


SU1 Address 1 254 1 -

SU2 Baudrate 1200 38400 19200 Baud 6.2.8 PASSWORD


L01 User 0 9999 0123 -


supplied.


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6.3 MANUFACTURER SETUP LOOP: CONFIGURATION OF THE COMPONENTS 6.3.1 PROBE PRESENCE


P01 Room Humidity NO YES NO -

P02 Supply Temperature NO YES NO -

P03 Supply Pressure Sensor NO YES NO -

6.3.2 PROBE TYPE


P05 Temperature: Type NTC PT1000 NTC -

P06 Temperature: Minimum -50.0 500.0 0.0 °C

P07 Temperature: Maximum -50.0 500.0 100.0 °C

P08 Humidity: Type NTC 0-1V 0-1V -

P09 Humidity: Minimum 0 100 0 Rh%

P10 Humidity: Maximum 0 100 100 Rh%

P11 Pressure: Type NTC 0-1V 0-5V -

P12 Pressure: Minimum 0 5000 0 Pa

P13 Pressure: Maximum 0 5000 5000 Pa 6.3.3 VENTILATION


VE1 Motorised Damper NO YES NO -

VE2 Variable Speed Fans NO YES NO -

FT1 Regulation Type Cooling power Constant Pressure Cooling power -

VE3 Minimum Speed 0 100 30 %

VE4 Maximum Speed 0 100 80 %

VE5 Fan Speed in Dehumidification VE3 100 30 %

FT2 Plug Fans Coefficient 0 1000 72 -

FT3 Fans Number 1 4 1 -

FT4 Modulation Speed 1 100 1 s

FT5 Air Flow Dead zone 100 800 100 m3/h

FT6 Pressure Dead zone 10 100 10 Pa 6.3.4 COOLING SETUP


H01 Unit Type Direct Expansion Chilled Water Direct Expansion -

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6.3.5 DIRECT EXPANSION


E01 Number of Compressors 1 2 1 -

E02 Automatic Rotation NO YES NO -

E03 Hot Gas Valve NO YES NO -

E04 Maximum Limit HG 0 100 80 %

E05 Maximum Limit HG in Dehumidification 0 100 40 % 6.3.6 HEATING SETUP


CL1 Heating NO Heating Valve NO -

CL2 Number of Heaters 0 2 1 - 6.3.7 HUMIDITY SETUP


UM1 Humidifier NO YES NO -

UM2 Cooling and Humidifier Together NO YES NO -

UM3 Dehumidification NO YES YES -

UM4 Partial Dehumidification NO YES NO - 6.3.8 SETPOINT LIMITS


r01 Minimum Temperature Limit -40.0 r02 15.0 °C

r02 Maximum Temperature Limit r01 150.0 30.0 °C

r03 Minimum Humidity Limit -40 r04 30 Rh%

r04 Maximum Humidity Limit r03 150 75 Rh% 6.3.9 REGULATION DEAD ZONE


ZM1 Temperature Dead Zone 0 80 10 %

ZM2 Humidity Dead Zone 0 80 20 %


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6.3.10 LAN SETUP


n00 LAN Address 1 100 1 -

n01 LAN Enable NO YES NO -

n02 Number of Units 2 12 2 -

n03 Number of Units in Standby 1 11 1 -

n04 Enable Unit Rotation NO YES NO -

n05 Time Period for Rotation 0 9999 1 H

n06 Enable Support NO Cascade Individual -

n07 Support Offset 0 20.0 2.0 °C

n08 Support Differential 0.1 20.0 1.0 °C

n09 Support Delay 0 9999 0 s 6.3.11 ALARM DELAY


Ad1 Temperature and Humidity 0 9999 300 s

Ad2 Startup Delay 0 9999 150 s

Ad3 Low Pressure 0 9999 180 s 6.3.12 PASSWORD


L02 Manufacturer 0 9999 0694 -


supplied.

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7 MEANING OF THE ALARM SCREENS

Each alarm condition is signalled by:

• Activation of the BUZZER incorporated in the user terminal; • Illumination of the RED LED on the front panel of the user terminal ( );

• Display of a bell symbol on the main program screen.

7.1 RESETTING THE BUZZER

Press EXIT ( ) to reset the buzzer without displaying the alarm. This function remains active even with the keypad block enabled.

7.2 ALARM CONDITION CHECK

Press ALARM ( ) to display the message corresponding to the most recent active alarm. The BUZZER is shut off. Use the ARROW KEYS ( ) to scroll through all active alarm signals. If the alarm is SERIOUS, and therefore blocks unit operation, the GREEN LED ( ) starts flashing. Press EXIT ( ) to return to the main program screen.

7.3 RESETTING AN ALARM

While an alarm is displayed, press and hold ALARM ( ) to delete the alarm signal shown on the display. Press and hold

ALARM ( ) to delete all stored alarm signals. If the alarm signals are reset without having eliminated the relative causes, the alarm signal will return immediately.


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7.4 TABLE OF ALARMS

NAME DESCRIPTION STARTUP DELAY

(s) OPERATING DELAY

(s) ACTIVATION

WITH UNIT OFF SERIOUS ALARM

NON-CRITICAL ALARM

AFS General Supply Fan 40 0 NO YES NO

AFr Fire/Smoke 0 0 YES YES NO

ADA Damper Status Ad2 0 NO YES NO

EA5 Room Humidity Probe Error 20 10 NO NO YES

EA6 Room Temperature Probe Error 20 10 NO NO YES

EA7 Supply Temperature Probe Error 20 10 NO NO YES

EA8 Supply Pressure Probe Error 20 10 NO NO YES

AC1 Compressor 1 General 0 0 NO NO YES

AC2 Compressor 2 General 0 0 NO NO YES

ALP Low Pressure Compressor 1 Ad3 0 NO NO YES

AL2 Low Pressure Compressor 2 Ad3 0 NO NO YES

ARG Electric Heater Safety Switch 0 0 NO NO YES

AFD Dirty Air Filter 20 0 NO NO YES

AHU External Humidifier General Alarm 20 0 NO NO YES

FLO Flood Alarm 0 0 YES NO YES

AMA No Master Alarm 20 5 NO NO YES

AHT High Room Temperature Ad1 Ad1 NO NO YES

ALT Low Room Temperature Ad1 Ad1 NO NO YES

AHH High Room Humidity Ad1 Ad1 NO NO YES

ALH Low Room Humidity Ad1 Ad1 NO NO YES

AHS High Supply Temperature Ad1 Ad1 NO NO YES

ALS Low Supply Temperature Ad1 Ad1 NO NO YES

For more detailed and specific information on alarm causes, please refer to the unit

INSTALLATION, OPERATION AND MAINTENANCE MANUAL accompanying the IT media supplied.

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8 SERIAL COMMUNICATION AND SUPERVISORY/BMS SYSTEMS 8.1 SERIAL COMMUNICATION

Serial communication is the transmission of information from one computer to another, or from a computer to a peripheral device, one bit at a time. This type of transmission is used by microprocessors for communication between peripheral devices (LAN, I/O expansion, etc.) and for communication with supervisory/BMS systems.

To allow communication between the monitored devices and those used to collect and analyse the data, a common language

is required, i.e. a collection of rules and commands recognised by both parts involved, called a communication protocol. There are various protocols: some are PROPRIETARY, i.e. developed by an individual brand for communicaiton between its

own instruments; others are defined as INTERNATIONAL STANDARDS, even if they are not yet universally established, and allow communication between instruments supplied by different manufacturers.

The Modbus® communication protocol, introduced to the market in the 1970s by MODICON, is one of the most common

protocols used by BMS systems in industrial and civil applications. The fact that it is easy to use, requires few resources and is reliable and flexible means it can be used to supervise all types of processes and procedures required by the user.

TECNAIR LV therefore chose the Modbus® communication protocol as the serial communication standard for its own units.

8.2 SUPERVISORY SYSTEMS

A supervisory system comprises the equipment and programs aimed at monitoring and managing a machine, or a small group of machines. Usually a supervisor is custom designed to meet the specific requirements of the system to be monitored. Normally a supervisory system is fitted where it becomes necessary to check specific critical variables in order to obtain operative data and logs. A supervisor is usually very limited and only checks the systems used to obtain the required status. A supervisor may be installed on site or examined remotely (e.g. using a modem). 8.3 BMS SYSTEMS

A system aimed at monitoring and managing whole buildings is called a BMS. A BMS system may resemble a large supervisor, but it usually features significantly more advanced functions than the latter. This type of monitoring is installed on sites where checking is required for all processes performed internally.

A BMS usually interacts with:

a. Fire/alarm systems b. Air processing systems c. Motion sensors d. Lighting systems e. Water systems f. etc.


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8.4 MICROPROCESSOR CONTROL ACCESSORIES 8.4.1 MODBUS® SERIAL CIRCUIT BOARD RS485

SURVEY microprocessors may be fitted as part of a supervisory and/or remote assistance network adopting the Modbus®

RS485 standard through a serial circuit board (optional).

The table lists the applications of the pinout connector on the RS485 serial circuit board:

PIN APPLICATION

1 D +

2 D -

3 GND

The serial communication protocol used has the following characteristics:

SERIAL COMMUNICATION PROTOCOL CHARACTERISTICS

Protocol Modbus® Slave, RTU mode Std. for communication RS485 Opto-isolated in terms of the network Baud Rate Varies between 1200 and 38400 Baud Word Length 8 Parity None Stop Bits 1

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8.4.2 SERIAL CIRCUIT BOARD CONNECTION To create a RS485 network, simply connect the SURVEY circuit boards via the connectors with extractable terminals on the

serial board, using a cable with the following characteristics: Type Cable cross-section Closing resistance Max. length

Belden 3106A/3107A AWG20/22 cross-sect. min. 0.2 mm2 / max. 2.5 mm2 120 Ω, 0.25 W 1000 m

Connection cable example

RS485 network connection example

WARNING!

DO NOT CREATE BRANCHES DO NOT LAY WITH POWER CABLES


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8.5 SERIES C SURVEY SUPERVISOR MICROPROCESSOR VARIABLES (SOFTWARE VERSION 1.0)

ANALOGUE VARIABLES (REGISTER)

REGISTER INDEX DESCRIPTION U.M. READ/WRITE

Analogue inputs

1 Room humidity %rh R

2 Room temperature °C R

3 Supply air temperature °C R

5 Supply pressure Pa R

Analogue outputs

6 Supply fan speed % R

7 Opening variable heating valve % R

8 Hot gas bypass/Variable cooling valve % R

9 External humidifier request % R

Working hours

11 Unit working hours h R

12 Compressor 1 working hours h R

13 Compressor 2 working hours h R

14 Humidifier working hours h R

15 Electric heater working hours h R

Regulation

16 Current air flow (long) m3/h R

17 Current air flow (long) m3/h

LAN

18 Unit 1 status * R












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Parameters

30 Temperature Setpoint °C R/W

31 Prop. band - Temperature °C R/W

32 Humidity Setpoint %Rh R/W

33 Prop. Band - Humidity %Rh R/W

34 Air Flow Setpoint m3/h R/W

35 Air Pressure Setpoint Pa R/W

Alarm Thresholds 36 High Room Temperature Threshold °C R/W

37 Low Room Temperature Threshold °C R/W

38 High Room Humidity Threshold °C R/W

39 Low Room Humidity Threshold °C R/W

40 High Supply Temperature Setpoint °C R/W

41 Low Supply Temperature Setpoint °C R/W

* Unit Status Descriptions 1 = Unit ON 2 = Unit OFF 3 = OFF due to serious alarm

4 = OFF via supervisor 5 = OFF via remote 6 = Standby

7 = In support 8 = Support request 9 = In replacement


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DIGITAL VARIABLES (COIL)

COIL INDEX DESCRIPTION READ/WRITE

Digital outputs

1 Supply fans control (DO1) R

2 Motorised dampers control (DO2) R

3 Compressor 1 control/Open 3P cooling valve (DO3) R

4 Compressor 2 control/Close 3P cooling valve (DO4) R

5 Elec. Heat. 1st stage/Open 3P heating valve (DO5) R

6 Elec. Heat. 2nd stage/Close 3P heating valve (DO6) R

7 General non-critical alarm (DO7) R

8 General serious alarm (DO8) R

Statuses

10 Unit ON R

Controls

14 Unit OFF: The unit is switched off via the supervisor R/W

15 Reset unit alarms R/W

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ALARMS (COIL)

COIL INDEX DESCRIPTION READ/WRITE

16 Humidity probe error or disconnection alarm R

17 Room temperature probe error or disconnection alarm R

18 Supply pressure probe error or disconnection alarm R

19 Supply temperature probe error or disconnection alarm R

21 Compressor 1 general alarm R

22 Compressor 2 general alarm R

23 Electric heater safety switch alarm R

24 General supply fans alarm (Unit OFF) R

25 Air filter dirty alarm R

26 Fire/Smoke alarm (Unit OFF) R

27 Low pressure compressor 1 alarm R

28 Low pressure compressor 2 alarm R

29 General external humidifier alarm R

30 High room temperature alarm R

31 Low room temperature alarm R

32 High room humidity alarm R

33 Low room humidity alarm R

34 No master alarm R

35 Motorised dampers alarm (Unit OFF) R

36 Flooding alarm R

37 High supply temperature alarm R

38 Low supply temperature alarm R


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9 SURVEY DEVICE TROUBLESHOOTING 9.1 THE UNIT DOES NOT START

LAN CONNECTION LED ON MAIN BOARD OFF, LCD OFF, OTHER LEDS OFF

Check the following:

• The mains power supply is connected. • 24 Vac is connected downstream of the supply voltage transformer. • The 24 Vac power supply connector has been correctly inserted into the corresponding support on the main

SURVEY board. • The protection fuse is intact. • The telephone cable connecting the terminal (if present) and the main board has been connected properly.

9.2 INCORRECT READING OF INPUT SIGNALS


• The inputs have been calibrated correctly (via program). • The SURVEY board and probes are powered correctly. • The digital inputs’ power supply is separated from the SURVEY power supply. • The probe wires have been connected in accordance with the instructions supplied. • The probe wires are positioned at a suitable distance from potential sources of electromagnetic interference (power

cables, contactors, high-voltage cables and cables connected to devices with high voltage consumption at start-up). • The thermal resistance level between the probe and any probe pocket is not too high. Place a little paste or

conductive oil inside the pockets if necessary, in order to guarantee effective temperature transmission. • Whether it is a probe error or whether it is a SURVEY conversion error. Checks may vary depending on the type of probe.

9.3 QUESTIONABLE ALARM SIGNALLING FROM DIGITAL INPUT

Make sure there is an alarm signal at the input, measuring the current between the shared terminal and the IDn digital input corresponding to the signalled alarm. The microprocessor signals an alarm when it detects open contacts:

• If the current is 5 mA or the alarm contact is closed. • If the current is 0 mA the alarm contact is open.

9.4 THE SURVEY DEVICE REPEATEDLY PROCEEDS IN WATCHDOG MODE,

I.E. IT SWITCHES OFF AND RESTARTS CONTINUALLY, AS IF THE POWER SUPPLY IS CUT OFF FOR A FEW SECONDS


• The power cables do not run near the main board microprocessors. • There are no sources of electromagnetic interference near the microprocessor or the data transmission cables.

9.5 SERIAL CONNECTION WITH THE SUPERVISOR/BMS DOE NOT WORK


• The RS485 serial circuit board is present and connected correctly. • The SURVEY unit identification number has been set correctly. • The type of serial cables used. • The serial cables have been connected correctly, in accordance with the diagram provided in the documentation

corresponding to the supervisory network. • The serial cables have not been disconnected.

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10 GLOSSARY

• Proportional band: defines a temperature range of just a few degrees starting from the setpoint, within which the system operates the control devices.

• Buzzer: sound device fitted onto the external terminals; a long sound indicates an alarm, while a short sound indicates that

the limits have been exceeded while setting the parameters. The remote 6-key terminals are not fitted wth this device. • Default: this term is used to describe the values (e.g. setpoint and proportional band values) that will be automatically

applied by the system if the operator fails to set them. • Step: defines an area of the proportional band (of temperature or humidity) within which a device is switched on and, at the

same time, defines the values at which the device is switched on and off. • Supply: the air delivered to the room by the air conditioner. • Screen: the screen appearing on the display. • Branch - Loop: series of screens relating to the same topic and which therefore can be accessed easily simply by pressing

the arrow keys; a branch may be accessed by pressing one of the keys on the terminal, which displays the first screen in the Loop.

• Ramp: the operating range of a variable valve from 0% to 100%. • Range: range of values that may be assumed by a parameter.

• Setpoint: defines the temperature (or humidity) value to which the system is set; the system activates the heating or

cooling devices until the temperature (or humidity) in the controlled environment matches the setpoint value. • Standby: defines the status of the unit while it is switched off locally.

• Stamp (memory): memory of the circuit board on which the default values for all parameters, selected by TECNAIR LV,

are stored. The memory is permanent, even if the power is cut off. • Variable valve: the variable valve is controlled by a signal with voltage varying from 0 to 10 V. • Dead zone - Neutral zone: define a very narrow temperature range between the setpoint and the proportional band within

which the control devices are not operated.


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11 NOTES

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TECNAIR LV S.p.AVia Caduti della Liberazione 53

21040 UBOLDO (VA)Tel. (+39) 029699111

Fax (+39) 0296781570@: [email protected]

www: www.tecnairlv.it

Documents

Survey Technical Manual v 1.0