CIAT AquaCIAT LD Series Bedienungsanleitung

ECG-UG-16-006

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Modbus

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USER GUIDE

AquaCIAT LD/ILD Chillers

Modbus Communication

ECG-UG-16-006

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Modbus

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Table of contents

REVISION HISTORY.................................................................................................................. 2

ACRONYMS............................................................................................................................. 2

1. CONNECTION CHANNELS ............................................................................................... 3

1.1. RS485 SOCKET DETAILS ............................................................................................................. 3

1.2. RJ45 SOCKET DETAILS................................................................................................................ 4

2. MODBUS FUNCTIONS .................................................................................................... 5

3. MAPPING INTERFACE..................................................................................................... 6

REVISION HISTORY

Revision

Date

Description of Change

Original

13/06/2016

Initial

Rev A

07/09/2016

Added SH and SUCT_T in mapping (SR1.4 and

above)

ACRONYMS

DI Discrete Input

EXV Expansion Valve

FC Free Cooling

HR Holding Register

IEEE Institute of Electrical and Electronics Engineers

IP Internet Protocol

IR 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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1. Connection channels

Here below sockets available for communication purposes with external devices.

sockets identification available for communication

1.1.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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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.

1.2.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)

ECG-UG-16-006

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Modbus

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2. Modbus Functions

The following standard function 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

ECG-UG-16-006

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Modbus

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3. Mapping interface

Table

Item

Description

Media

Type

Address

(hex)

Format

ALM

COOLER_FREEZE_F

ALM_COOLER_FREEZE_F

(0001)h

Byte (8-bit)

ALM

LOW_SUCTION_A_F

ALM_LOW_SUCTION_A_F

(0005)h

Byte (8-bit)

ALM

LOW_SUCTION_B_F

ALM_LOW_SUCTION_B_F

(0006)h

Byte (8-bit)

ALM

HIGH_SH_A_F

ALM_HIGH_SH_A_F

(0008)h

Byte (8-bit)

ALM

HIGH_SH_B_F

ALM_HIGH_SH_B_F

(0009)h

Byte (8-bit)

ALM

LOW_SH_A_F

ALM_LOW_SH_A_F

(000B)h

Byte (8-bit)

ALM

LOW_SH_B_F

ALM_LOW_SH_B_F

(000C)h

Byte (8-bit)

ALM

COOLER_LOCK_F

ALM_COOLER_LOCK_F

(000E)h

Byte (8-bit)

ALM

CPA1_REVERSE_ROT_F

ALM_CPA1_REVERSE_ROT_F

(0010)h

Byte (8-bit)

ALM

CPA2_REVERSE_ROT_F

ALM_CPA2_REVERSE_ROT_F

(0011)h

Byte (8-bit)

ALM

CPA3_REVERSE_ROT_F

ALM_CPA3_REVERSE_ROT_F

(0012)h

Byte (8-bit)

ALM

CPB1_REVERSE_ROT_F

ALM_CPB1_REVERSE_ROT_F

(0014)h

Byte (8-bit)

ALM

CPB2_REVERSE_ROT_F

ALM_CPB2_REVERSE_ROT_F

(0015)h

Byte (8-bit)

ALM

LOSS_COM_MS_F

ALM_LOSS_COM_MS_F

(001E)h

Byte (8-bit)

ALM

CCN_EMSTOP_F

(001F)h

Byte (8-bit)

ALM

COOL_PUMP1_F

(0020)h

Byte (8-bit)

ALM

COOL_PUMP2_F

(0021)h

Byte (8-bit)

ALM

REPEATED_HI_DGT_A_F

REPEATED_HIGH_DGT_A_F

(0025)h

Byte (8-bit)

ALM

REPEATED_HI_DGT_B_F

REPEATED_HIGH_DGT_B_F

(0026)h

Byte (8-bit)

ALM

REPEATED_LO_SST_A_F

REPEATED_LOW_SST_A_F

(0028)h

Byte (8-bit)

ALM

REPEATED_LO_SST_B_F

REPEATED_LOW_SST_B_F

(0029)h

Byte (8-bit)

ALM

HEAT_LOW_EWT_F

(002B)h

Byte (8-bit)

ALM

HP_SWITCH_A_F

(003F)h

Byte (8-bit)

ALM

HP_SWITCH_B_F

(0040)h

Byte (8-bit)

ALM

SENSORS_SWAP_F

Byte (8-bit)

ECG-UG-16-006

REVISION

DATE

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Modbus

Rev A

1/13/17

7 OF 20

Company private. Do not distribute outside of CIAT Corporation

Table

Item

Description

Media

Type

Address

(hex)

Format

(0061)h

ALM

LOSS_COM_SM_F

ALM_LOSS_COM_SM_F

(001D)h

Byte (8-bit)

ALM

FLUIDE_FAIL

(0063)h

Byte (8-bit)

ALM

FC_PROCESS_F

101

(0065)h

Byte (8-bit)

ALM

WL_PRESS_Z_ERROR_F

WL_PRESS_ZERO_ERROR_F

1202

(04B2)h

Byte (8-bit)

ALM

WL_PRESS_TOO_LOW_F

1203

(04B3)h

Byte (8-bit)

ALM

WL_PUMP_NO_START_F

WL_PUMP_NOT_STARTED_F

1204

(04B4)h

Byte (8-bit)

ALM

WL_PRESS_ERR_RTST_F

WL_PRESS_ERROR_IN_RUNTEST_F

1205

(04B5)h

Byte (8-bit)

ALM

WL_PUMP_OVERLOAD_F

1206

(04B6)h

Byte (8-bit)

ALM

WL_LOW_FLOW_F

1207

(04B7)h

Byte (8-bit)

ALM

WL_PRESS_CROSS_F

1208

(04B8)h

Byte (8-bit)

ALM

WL_LOW_PRESS_WARN_F

WL_LOW_PRESS_WARNING_F

1209

(04B9)h

Byte (8-bit)

ALM

DP_A_F

ALM_DP_A_F

2001

(07D1)h

Byte (8-bit)

ALM

DP_B_F

ALM_DP_B_F

2002

(07D2)h

Byte (8-bit)

ALM

SP_A_F

ALM_SP_A_F

2004

(07D4)h

Byte (8-bit)

ALM

SP_B_F

ALM_SP_B_F

2005

(07D5)h

Byte (8-bit)

ALM

WP_IN_F

2024

(07E8)h

Byte (8-bit)

ALM

WP_OUT_F

2025

(07E9)h

Byte (8-bit)

ALM

SERVICE_MAINT_ALERT

SERVICE_MAINTNANCE_ALERT

3000

(0BB8)h

Byte (8-bit)

ALM

FGAS_NEEDED

3005

(0BBD)h

Byte (8-bit)

ALM

SIOB_A_LOW_VOLT_F

SIOB_LOW_VOLT_CIRA_F

4001

(0FA1)h

Byte (8-bit)

ALM

SIOB_B_LOW_VOLT_F

SIOB_LOW_VOLT_CIRB_F

4002

(0FA2)h

Byte (8-bit)

ALM

SIOB_CIR_A_COM_F

ALM_SIOB_CIR_A_COM_F

4901

(1325)h

Byte (8-bit)

ALM

SIOB_CIR_B_COM_F

ALM_SIOB_CIR_B_COM_F

4902

(1326)h

Byte (8-bit)

ALM

AUX1_COM_F

ALM_AUX1_COM_F

4601

(11F9)h

Byte (8-bit)

ALM

FC_AUX1_COM_F

4602

(11FA)h

Byte (8-bit)

ECG-UG-16-006

REVISION

DATE

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Modbus

Rev A

1/13/17

8 OF 20

Company private. Do not distribute outside of CIAT Corporation

Table

Item

Description

Media

Type

Address

(hex)

Format

ALM

COOL_EWT_F

ALM_COOL_EWT_F

5001

(1389)h

Byte (8-bit)

ALM

COOL_LWT_F

ALM_COOL_LWT_F

5002

(138A)h

Byte (8-bit)

ALM

DEFROST_T_A_F

ALM_DEFROST_T_A_F

5003

(138B)h

Byte (8-bit)

ALM

DEFROST_T_B_F

ALM_DEFROST_T_B_F

5004

(138C)h

Byte (8-bit)

ALM

OAT_F

ALM_OAT_F

5010

(1392)h

Byte (8-bit)

ALM

CHWSTEMP_F

ALM_CHWSTEMP_F

5011

(1393)h

Byte (8-bit)

ALM

SUCTION_T_A_F

ALM_SUCTION_T_A_F

5012

(1394)h

Byte (8-bit)

ALM

SUCTION_T_B_F

ALM_SUCTION_T_B_F

5013

(1395)h

Byte (8-bit)

ALM

SGTC1_F

ALM_SGTC1_F

5044

(13B4)h

Byte (8-bit)

ALM

SGTC2_F

ALM_SGTC2_F

5045

(13B5)h

Byte (8-bit)

ALM

FC_WLOOP_F

5046

(13B6)h

Byte (8-bit)

ALM

FC_LWT_F

5047

(13B7)h

Byte (8-bit)

ALM

FC_OAT_F

5048

(13B8)h

Byte (8-bit)

ALM

DRV_FAN_A_F

7001

(1B59)h

Byte (8-bit)

ALM

DRV_FAN_B_F

7002

(1B5A)h

Byte (8-bit)

ALM

DRV_WTR_PUMP_F

7003

(1B5B)h

Byte (8-bit)

ALM

ILL_FACT_CONF_F

8001

(1F41)h

Byte (8-bit)

ALM

INI_FACT_CONF_F

8000

(1F40)h

Byte (8-bit)

ALM

M_S_CONFIG_F

8101

(1FA5)h

Byte (8-bit)

PROTOCOL

SP_OCC

Setpoint Occupied?

(0000)h

Signed Integer

(32-bit)

PROTOCOL

CHIL_S_S

Net.: Cmd Start/Stop

(0002)h

Signed Integer

(32-bit)

PROTOCOL

CHIL_OCC

Chiller occupied?

(0004)h

Signed Integer

(32-bit)

PROTOCOL

EMSTOP

Emergency Stop

(0006)h

Signed Integer

(32-bit)

PROTOCOL

HC_SEL

Heatcool Select

(0008)h

Signed Integer

(32-bit)

PROTOCOL

SP_SEL

Setpoint Select

(000A)h

Signed Integer

(32-bit)

PROTOCOL

DEM_LIM

Demand Limit

Signed Integer

ECG-UG-16-006

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Modbus

Rev A

1/13/17

9 OF 20

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Table

Item

Description

Media

Type

Address

(hex)

Format

(000C)h

(32-bit)

PROTOCOL

CTRL_PNT

Control Point

(000E)h

IEEE Float

(32-bit)

HCCONFIG

cr_sel

Cooling Reset Select

(0012)h

Signed Integer

(32-bit)

HCCONFIG

hr_sel

Heating Reset Select

(0014)h

Signed Integer

(32-bit)

RESETCFG

oatcr_no

OAT No Reset Value

(0016)h

IEEE Float

(32-bit)

RESETCFG

oatcr_fu

OAT Full Reset Value

(0018)h

IEEE Float

(32-bit)

RESETCFG

dt_cr_no

Delta T No Reset Value

(001A)h

IEEE Float

(32-bit)

RESETCFG

dt_cr_fu

Delta T Full Reset Value

(001C)h

IEEE Float

(32-bit)

RESETCFG

cr_deg

Cooling Reset Deg. Value

(001E)h

IEEE Float

(32-bit)

RESETCFG

oathr_no

OAT No Reset Value

(0020)h

IEEE Float

(32-bit)

RESETCFG

oathr_fu

OAT Full Reset Value

(0022)h

IEEE Float

(32-bit)

RESETCFG

dt_hr_no

Delta T No Reset Value

(0024)h

IEEE Float

(32-bit)

RESETCFG

dt_hr_fu

Delta T Full Reset Value

(0026)h

IEEE Float

(32-bit)

RESETCFG

hr_deg

Heating Reset Deg. Value

(0028)h

IEEE Float

(32-bit)

CP_UNABL

un_cp_a1

Compressor A1 Disable

(003C)h

Signed Integer

(32-bit)

CP_UNABL

un_cp_a2

Compressor A2 Disable

(003E)h

Signed Integer

(32-bit)

CP_UNABL

un_cp_a3

Compressor A3 Disable

(0040)h

Signed Integer

(32-bit)

CP_UNABL

un_cp_b1

Compressor B1 Disable

(0044)h

Signed Integer

(32-bit)

CP_UNABL

un_cp_b2

Compressor B2 Disable

(0046)h

Signed Integer

(32-bit)

SETPOINT

csp1

Cooling Setpoint 1

(004C)h

IEEE Float

(32-bit)

SETPOINT

csp2

Cooling Setpoint 2

(004E)h

IEEE Float

(32-bit)

SETPOINT

hsp1

Heating Setpoint 1

(0050)h

IEEE Float

(32-bit)

SETPOINT

hsp2

Heating Setpoint 2

(0052)h

IEEE Float

(32-bit)

SETPOINT

ramp_sp

Ramp Loading

(0054)h

IEEE Float

(32-bit)

SETPOINT

cauto_sp

Cool Changeover Setpt

(0056)h

IEEE Float

(32-bit)

SETPOINT

hauto_sp

Heat Changeover Setpt

(0058)h

IEEE Float

(32-bit)

ECG-UG-16-006

REVISION

DATE

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Modbus

Rev A

1/13/17

10 OF 20

Company private. Do not distribute outside of CIAT Corporation

Table

Item

Description

Media

Type

Address

(hex)

Format

SETPOINT

lim_sp1

Switch Limit Setpoint 1

(005A)h

Signed Integer

(32-bit)

SETPOINT

lim_sp2

Switch Limit Setpoint 2

(005C)h

Signed Integer

(32-bit)

SETPOINT

lim_sp3

Switch Limit Setpoint 3

(005E)h

Signed Integer

(32-bit)

SETPOINT

min_sct

Desuperheater Min Sct

(0060)h

IEEE Float

(32-bit)

MODBUSRS

metric

Metric Unit

106

(006A)h

Signed Integer

(32-bit)

MODBUSRS

swap_b

Swap Bytes

108

(006C)h

Signed Integer

(32-bit)

MODBUSRS

real_typ

Real type management

110

(006E)h

Signed Integer

(32-bit)

MODBUSIP

metric

Metric Unit

112

(0070)h

Signed Integer

(32-bit)

MODBUSIP

swap_b

Swap Bytes

114

(0072)h

Signed Integer

(32-bit)

MODBUSIP

real_typ

Real type management

116

(0074)h

Signed Integer

(32-bit)

GENUNIT

SP_OCC

Setpoint Occupied?

(0000)h

Signed Integer

(32-bit)

GENUNIT

CHIL_S_S

Net.: Cmd Start/Stop

(0002)h

Signed Integer

(32-bit)

GENUNIT

CHIL_OCC

Net.: Cmd Occupied

(0004)h

Signed Integer

(32-bit)

GENUNIT

EMSTOP

Emergency Stop

(0006)h

Signed Integer

(32-bit)

GENUNIT

CTRL_TYP

Local=0 Net.=1 Remote=2

(0008)h

Signed Integer

(32-bit)

GENUNIT

STATUS

Running Status

(000A)h

Signed Integer

(32-bit)

GENUNIT

min_left

Minutes Left for Start

(000C)h

IEEE Float

(32-bit)

GENUNIT

HEATCOOL

Heat/Cool status

(000E)h

Signed Integer

(32-bit)

GENUNIT

SP_SEL

Setpoint Select

(0010)h

Signed Integer

(32-bit)

GENUNIT

CAP_T

Percent Total Capacity

(0012)h

Signed Integer

(32-bit)

GENUNIT

CAPA_T

Circuit A Total Capacity

(0014)h

Signed Integer

(32-bit)

GENUNIT

CAPB_T

Circuit B Total Capacity

(0016)h

Signed Integer

(32-bit)

GENUNIT

DEM_LIM

Active Demand Limit Val

(0018)h

Signed Integer

(32-bit)

GENUNIT

Current Setpoint

(001A)h

IEEE Float

(32-bit)

GENUNIT

CTRL_PNT

Control Point

(001C)h

IEEE Float

(32-bit)

GENUNIT

ALM

Alarm State

Signed Integer

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