CIAT DynaCIAT LG Manuel utilisateur

ECG–UG–16-014

REVISION

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DynaCIAT LG/LGN

–Modbus

Communication

Original

03/04/2017

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This document is the property of CIAT Corporation and is delivered on the express condition that it is not to be

disclosed, reproduced in whole or in part, or used for manufacture by anyone other than CIAT Corporation without

its written consent, and that no right is granted to disclose or so use any information contained in said document.

Connect Touch Control for DynaCIAT LG/LGN

chillers

MODBUS COMMUNICATION

User’s guide

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–Modbus

Communication

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This document is the property of CIAT Corporation and is delivered on the express condition that it is not to be disclosed, reproduced in whole or in part, or used for manufacture

by anyone other than CIAT Corporation without its written consent, and that no right is granted to disclose or so use any information contained in said document.

REVISIONS HISTORY

REV

DATE yyyy mm dd

DESCRIPTION

DONE BY

Original

2017-04-03

Original

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Modbus

Communication

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This document is the property of CIAT Corporation and is delivered on the express condition that it is not to be

disclosed, reproduced in whole or in part, or used for manufacture by anyone other than CIAT Corporation

without its written consent, and that no right is granted to disclose or so use any information contained in said

document.

TABLE OF CONTENT

REVISIONS HISTORY ............................................................................................................... 2

TABLE OF CONTENT ............................................................................................................... 3

1INTRODUCTION ............................................................................................................... 4

1.1 Purpose .......................................................................................................................... 4

1.2 Definitions, Abbreviations and acronyms......................................................................... 4

2CONNECTION CHANNELS .................................................................................................... 5

2.1 RS485 socket details........................................................................................................ 5

2.2 RJ45 socket details.......................................................................................................... 6

3MODBUS FUNCTIONS ....................................................................................................... 7

4MAPPING INTERFACE ........................................................................................................ 8

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Modbus

Communication

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This document is the property of CIAT Corporation and is delivered on the express condition that it is not to be

disclosed, reproduced in whole or in part, or used for manufacture by anyone other than CIAT Corporation

without its written consent, and that no right is granted to disclose or so use any information contained in said

document.

1INTRODUCTION

1.1 Purpose

This guide is intended to be used by Building Management System (BMS) engineer inside or outside the CIAT

Corporation.

It describes in details the Modbus communication with DynaCIAT LG/LGN units.

All information already provided in the product IOM are not available in this document.

1.2 Definitions, Abbreviations and acronyms

Acronym

/Abbreviation

Definition

Discrete Input

EXV

Expansion Valve

Free Cooling

Holding Register

IEEE

Institute of Electrical and Electronics Engineers

Internet Protocol

Input Register

Net

Network

OAT

Outside Air Temperature

RTU

Remote Terminal United Technologies Corporation

SCT

Saturated Condensing Temperature

SST

Saturated Suction Temperature

TCP

Transmission Control Protocol

xxLS

..Low Speed

xxHS

..High Speed

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Modbus

Communication

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This document is the property of CIAT Corporation and is delivered on the express condition that it is not to be

disclosed, reproduced in whole or in part, or used for manufacture by anyone other than CIAT Corporation

without its written consent, and that no right is granted to disclose or so use any information contained in said

document.

2CONNECTION CHANNELS

Here below sockets available for communication purposes with external devices.

sockets identification available for communication

NB: PORT 0 should be used only if it is not already used to connect a gateway integrated in the unit.

2.1 RS485 socket details

Bus “port0” is intended to Modbus serial line with RS485 (i.e. no control flow)

Transmission mode:

Used for Local area network communication type by external devices.

With twisted shielded pair

distance up to 1000m without amplifier

Normally configurable at 9600, 19200 or 38400 baud in half duplex.

Parity bit may be active or deactivated. If parity is disabled, additional stop bits are automatically

set for frame timing considerations. Otherwise, parity may be odd or even according to the

settings chosen.

Exclusively RTU mode operates with configurable combination (No ASCII mode permission)

1 start, 8 data, even parity, 1 stop bit

1 start, 8 data, odd parity, 1 stop bit

1 start, 8 data, even parity forced, 1 stop bit

1 start, 8 data, odd parity forced, 1 stop bit

1 start, 8 data, 2 stop bit

1 start, 8 data, no parity , 1 stop bit (EXCLUDED)

RTU protocol is compatible with both Little/ Big Endian for data field (i.e. either most significant

byte is sent first or Least significant byte is sent first)

Unit identifier must be declared from 1 to 247 as slave product number setup (i.e. station

number)

Cyclic Redundancy Check is made by the RTU protocol layer as defined in Appendix A of “Modbus

over serial line” specification available at modbus.org

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Modbus

Communication

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This document is the property of CIAT Corporation and is delivered on the express condition that it is not to be

disclosed, reproduced in whole or in part, or used for manufacture by anyone other than CIAT Corporation

without its written consent, and that no right is granted to disclose or so use any information contained in said

document.

Due to floating no native floating point representation for the Modbus communication protocol,

IEEE754 representation has been integrated. As the opposite, float handled as integer is also

available (i.e. float X 10) depending on setup.

Bus “port1” is proprietary and therefore reserved for internal purpose.

2.2 RJ45 socket details

Modbus Ethernet is intended to Modbus IP.

Used for wide area network communication type by external devices (building management system tool or

maintenance tool and so on…)

Cross pair wired cable shall be used for nominal configuration.

distance up to 100m without amplifier

Speed communication at 10 Mega baud not configurable

IPv4 address configurable for class address with DHCP NOT active for

Class A (0.xxx.xxx.xxx to 127.xxx.xxx.xxx)

Class B (128.0.xxx.xxx to 191. 255.xxx.xxx)

Class C (192.0.0.xxx to 223.255.255.xxx)

(IP address declared on the control unit needed to set up connection with external device)

All requests are sent via Transfer Control Protocol on registered port 502 by default but other port

number may be set as calibrate value.

TCP/IP Modbus protocol is compatible with both Little/ Big Endian for data field (i.e. either most

significant byte is sent first or Least significant byte is sent first)

Unit identifier must be declared from 1 to 247 as slave product number setup (i.e. station

number)

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Modbus

Communication

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This document is the property of CIAT Corporation and is delivered on the express condition that it is not to be

disclosed, reproduced in whole or in part, or used for manufacture by anyone other than CIAT Corporation

without its written consent, and that no right is granted to disclose or so use any information contained in said

document.

3MODBUS FUNCTIONS

The following standard functions are supported:

Code

Modbus function

Address register range

Application

01 with quantity 1

READ COIL STATUS

0 to 9999 (decimal)

None

01 with quantity N

READ MULTIPLE COIL STATUS

(from 1 to 2000max.

contiguous)

None

15 with quantity 1

WRITE COIL

None

15 with quantity N

WRITE MULTIPLE COILS (from 1

to 2000max. contiguous)

None

02 with quantity 1

READ DISCRETE INPUT

0 to 9999 (decimal)

Alarms

02 with quantity N

READ MULTIPLE DISCRETE

INPUTS (from 1 to 2000max.

contiguous)

04 with quantity 2

READ INPUT REGISTER

0 to 9999 (decimal)

Useful user parameters

04 with quantity NX2

READ MULTIPLE INPUT

REGISTERS (from 1 to 123 max.

contiguous)

Useful user parameters

03 with quantity 2

READ HOLDING REGISTER

0 to 9999 (decimal)

Configuration or service dataset

03 with quantity NX2

READ MULTIPLE HOLDING

REGISTERS (from 1 to 123 max.

contiguous)

Configuration or service dataset

16 with quantity 2

WRITE HOLDING REGISTER

Configuration or service dataset

16 with quantity NX2

WRITE MULTIPLE HOLDING

REGISTERS (from 1 to 123 max.

contiguous)

Configuration or service dataset

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Modbus

Communication

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This document is the property of CIAT Corporation and is delivered on the express condition that it is not to be

disclosed, reproduced in whole or in part, or used for manufacture by anyone other than CIAT Corporation

without its written consent, and that no right is granted to disclose or so use any information contained in said

document.

4MAPPING INTERFACE

Table

Item

Description

Media

Type

Address

(hex)

Format

ALM

COOLER_FREEZE_F

Cooler Water Exchanger Freeze

Protection

1 (0001)h

Byte (8-bit)

ALM

LOW_SUCTION_A_F

Circuit A Low Saturated Suction

Temperature

5 (0005)h

Byte (8-bit)

ALM

LOW_SUCTION_B_F

Circuit B Low Saturated Suction

Temperature

6 (0006)h

Byte (8-bit)

ALM

HIGH_SH_A_F

Circuit A High Suction Superheat

8 (0008)h

Byte (8-bit)

ALM

HIGH_SH_B_F

Circuit B High Suction Superheat

9 (0009)h

Byte (8-bit)

ALM

LOW_SH_A_F

Circuit A Low Suction Superheat

11 (000B)h

Byte (8-bit)

ALM

LOW_SH_B_F

Circuit B Low Suction Superheat

12 (000C)h

Byte (8-bit)

ALM

LOCK_SW_F

Customer Interlock Failure

14 (000E)h

Byte (8-bit)

ALM

CONDENSER_LOCK_F

Condenser Flow Switch Failure

15 (000F)h

Byte (8-bit)

ALM

CPA1_REVERSE_ROT_F

Compressor A1 Not Started Or

Pressure Increase not Established

16 (0010)h

Byte (8-bit)

ALM

CPA2_REVERSE_ROT_F

Compressor A2 Not Started Or

Pressure Increase not Established

17 (0011)h

Byte (8-bit)

ALM

CPA3_REVERSE_ROT_F

Compressor A3 Not Started Or

Pressure Increase not Established

18 (0012)h

Byte (8-bit)

ALM

CPB1_REVERSE_ROT_F

Compressor B1 Not Started Or

Pressure Increase not Established

20 (0014)h

Byte (8-bit)

ALM

CPB2_REVERSE_ROT_F

Compressor B2 Not Started Or

Pressure Increase not Established

21 (0015)h

Byte (8-bit)

ALM

LOSS_COM_MS_F

Master/Slave communication Failure

30 (001E)h

Byte (8-bit)

ALM

NETWORK_EMSTOP_F

Unit is in Network emergency stop

31 (001F)h

Byte (8-bit)

ALM

COOL_PUMP1_F

Cooler pump 1 default

32 (0020)h

Byte (8-bit)

ALM

COOL_PUMP2_F

Cooler pump 2 default

33 (0021)h

Byte (8-bit)

ALM

COND_PUMP1_F

Condenser pump 1 default

73 (0049)h

Byte (8-bit)

ALM

COND_PUMP2_F

Condenser pump 2 default

74 (004A)h

Byte (8-bit)

ALM

REPEAT_HIGH_DGT_A_F

Circuit A Repeated High Discharge Gas

Overrides

37 (0025)h

Byte (8-bit)

ALM

REPEAT_HIGH_DGT_B_F

Circuit B Repeated High Discharge Gas

Overrides

38 (0026)h

Byte (8-bit)

ALM

REPEAT_LOW_SST_A_F

Circuit A Repeated low suction

temperature overrides

40 (0028)h

Byte (8-bit)

ALM

REPEAT_LOW_SST_B_F

Circuit B Repeated low suction

temperature overrides

41 (0029)h

Byte (8-bit)

ALM

HEAT_LOW_EWT_F

Low entering water temperature in

heating

43 (002B)h

Byte (8-bit)

ALM

COOLER_FLOW_F

Cooler flow switch failure

51 (0033)h

Byte (8-bit)

ALM

HP_A_F

Circuit A High pressure switch Failure

63 (003F)h

Byte (8-bit)

ALM

HP_B_F

Circuit B High pressure switch Failure

64 (0040)h

Byte (8-bit)

ALM

SENSORS_SWAP_F

Cooler Water Exchanger Temperature

Sensors Swapped

97 (0061)h

Byte (8-bit)

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Modbus

Communication

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This document is the property of CIAT Corporation and is delivered on the express condition that it is not to be

disclosed, reproduced in whole or in part, or used for manufacture by anyone other than CIAT Corporation

without its written consent, and that no right is granted to disclose or so use any information contained in said

document.

Table

Item

Description

Media

Type

Address

(hex)

Format

ALM

COND_SENSORS_SWAP_F

Condenser Water Exchanger

Temperature Sensors Swapped

98 (0062)h

Byte (8-bit)

ALM

LOSS_COM_SM_F

Loss of communication with System

Manager

29 (001D)h

Byte (8-bit)

ALM

FLUIDE_FAIL

Possible Refrigerant Leakage Failure

99 (0063)h

Byte (8-bit)

ALM

FC_PROCESS_F

Free Cooling Process Failure

101 (0065)h

Byte (8-bit)

ALM

CL_WL_PRES_ZERO_ERR

Cooler water loop process failure -

zero error

1202 (04B2)h

Byte (8-bit)

ALM

CL_WL_PRES_TOO_LOW

Cooler water loop failure - water

press too low

1203 (04B3)h

Byte (8-bit)

ALM

CL_WL_PUMP_NO_START

Cooler water loop failure - pump not

started

1204 (04B4)h

Byte (8-bit)

ALM

CL_WL_SPECI_PUMP_RT

Cooler Water Loop : RT specific

1205 (04B5)h

Byte (8-bit)

ALM

CL_WL_PUMP_OVERLOAD

Cooler water loop failure - pump

overload

1206 (04B6)h

Byte (8-bit)

ALM

CL_WL_FLOW_SWITCH_F

Cooler water loop failure - switch fail

1207 (04B7)h

Byte (8-bit)

ALM

CL_WL_PRES_CROSS

Cooler water loop failure - press cross

1208 (04B8)h

Byte (8-bit)

ALM

CD_WL_PRES_ZERO_ERR

Condenser water loop failure - zero

error

1102 (044E)h

Byte (8-bit)

ALM

CD_WL_PRES_TOO_LOW

Condenser water loop failure - water

press too low

1103 (044F)h

Byte (8-bit)

ALM

CD_WL_PUMP_NO_START

Condenser water loop failure - pump

not started

1104 (0450)h

Byte (8-bit)

ALM

CD_WL_SPECI_PUMP_RT

Condenserer Water Loop : RT specific

1105 (0451)h

Byte (8-bit)

ALM

CD_WL_PUMP_OVERLOAD

Condenser water loop failure - pump

overload

1106 (0452)h

Byte (8-bit)

ALM

CD_WL_FLOW_SWITCH_F

Condenser water loop failure - switch

fail

1107 (0453)h

Byte (8-bit)

ALM

CD_WL_PRES_CROSS

Condenser water loop failure - press

cross

1108 (0454)h

Byte (8-bit)

ALM

CL_WL_PROCESS_F

Cooler Water loop process Failure

1100 (044C)h

Byte (8-bit)

ALM

CD_WL_PROCESS_F

Condenser Water loop Failure

1200 (04B0)h

Byte (8-bit)

ALM

DP_A_F

Circuit A Discharge Pressure

Transducer Failure

2001 (07D1)h

Byte (8-bit)

ALM

DP_B_F

Circuit B Discharge Pressure

Transducer Failure

2002 (07D2)h

Byte (8-bit)

ALM

SP_A_F

Circuit A Suction Pressure Transducer

Failure

2004 (07D4)h

Byte (8-bit)

ALM

SP_B_F

Circuit B Suction Pressure Transducer

Failure

2005 (07D5)h

Byte (8-bit)

ALM

CL_WP_IN_F

Water Exchanger Entering Fluid

Transducer Failure

2024 (07E8)h

Byte (8-bit)

ALM

CL_WP_OUT_F

Water Exchanger Leaving Fluid

Transducer Failure

2025 (07E9)h

Byte (8-bit)

ALM

CD_WP_IN_F

Water Condenser Entering Fluid

Transducer Failure

2026 (07EA)h

Byte (8-bit)

ALM

CD_WP_OUT_F

Water Condenser Leaving Fluid

2027 (07EB)h

Byte (8-bit)

ECG–UG–16-014

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Modbus

Communication

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This document is the property of CIAT Corporation and is delivered on the express condition that it is not to be

disclosed, reproduced in whole or in part, or used for manufacture by anyone other than CIAT Corporation

without its written consent, and that no right is granted to disclose or so use any information contained in said

document.

Table

Item

Description

Media

Type

Address

(hex)

Format

Transducer Failure

ALM

SERVICE_MAINTNANCE

Service maintenance alert

3000 (0BB8)h

Byte (8-bit)

ALM

FGAS_NEEDED

Fgas check needed, call your

maintenance company

3005 (0BBD)h

Byte (8-bit)

ALM

SIOB_A_LOW_VOLT_F

SIOB 1 Low Voltage Failure

4001 (0FA1)h

Byte (8-bit)

ALM

SIOB_B_LOW_VOLT_F

SIOB 2 Low Voltage Failure

4002 (0FA2)h

Byte (8-bit)

ALM

EXV_A_F

Main EXV stepper motor failure - cir A

4005 (0FA5)h

Byte (8-bit)

ALM

EXV_B_F

Main EXV stepper motor failure - cir B

4020 (0FB4)h

Byte (8-bit)

ALM

SIOB_A_COM_F

Loss of communication with SIOB

Board Number 1

4901 (1325)h

Byte (8-bit)

ALM

SIOB_B_COM_F

Loss of communication with SIOB

Board Number 2

4902 (1326)h

Byte (8-bit)

ALM

AUX1_HEATER_COM_F

Loss of communication with AUX1

Heating Device Control board

4601 (11F9)h

Byte (8-bit)

ALM

AUX1_DRYC_COM_F

Loss of communication with AUX1

Condenser board

4602 (11FA)h

Byte (8-bit)

ALM

AUX1_FREECOOL_COM_F

Loss of communication with AUX1

FreeCooling board

4603 (11FB)h

Byte (8-bit)

ALM

AUX1_OPTION_COM_F

Loss of communication with AUX1

Options board

4604 (11FC)h

Byte (8-bit)

ALM

FC_AUX1_COM_F

Loss of communication with Free

Cooling Board 1

4602 (11FA)h

Byte (8-bit)

ALM

COOL_EWT_F

Water Exchanger Entering Fluid

Thermistor Failure

5001 (1389)h

Byte (8-bit)

ALM

COOL_LWT_F

Water Exchanger Leaving Fluid

Thermistor Failure

5002 (138A)h

Byte (8-bit)

ALM

COND_EWT_F

Condenser Entering Fluid Thermistor

Failure

5006 (138E)h

Byte (8-bit)

ALM

COND_LWT_F

Condenser Leaving Fluid Thermistor

Failure

5007 (138F)h

Byte (8-bit)

ALM

OAT_F

OAT Thermistor Failure

5010 (1392)h

Byte (8-bit)

ALM

CHWSTEMP_F

Master/Slave Common Fluid

Thermistor Failure

5011 (1393)h

Byte (8-bit)

ALM

HTWSTEMP_F

Master/Slave Common Heating Fluid

Thermistor Failure

5032 (13A8)h

Byte (8-bit)

ALM

DRY_LWT_F

Dry Cooler LWT Thermistor Failure

5036 (13AC)h

Byte (8-bit)

ALM

DGT_A_F

Circuit A Discharge Gas Thermistor

Failure

5044 (13B4)h

Byte (8-bit)

ALM

DGT_B_F

Circuit B Discharge Gas Thermistor

Failure

5045 (13B5)h

Byte (8-bit)

ALM

SUCTION_T_A_F

Circuit A Suction Gas Thermistor

Failure

5012 (1394)h

Byte (8-bit)

ALM

SUCTION_T_B_F

Circuit B Suction Gas Thermistor

Failure

5013 (1395)h

Byte (8-bit)

ALM

FC_WLOOP_F

Free Cooling Water Loop Thermistor

Failure

5046 (13B6)h

Byte (8-bit)

ALM

FC_LWT_F

Free Cooling Leaving Water

5047 (13B7)h

Byte (8-bit)

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