CIAT AquaCIAT LD Series User manual

ECG-UG-16-006
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AquaCIAT LD/ILD
Modbus
Rev A
1/13/17
1 OF 20
Company private. Do not distribute outside of CIAT Corporation
USER GUIDE
AquaCIAT LD/ILD Chillers
Modbus Communication

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Modbus
Rev A
1/13/17
2 OF 20
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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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Modbus
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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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Modbus
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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)

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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

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Modbus
Rev A
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3. Mapping interface
Table
Item
Description
Media
Type
Address
(hex)
Format
ALM
COOLER_FREEZE_F
ALM_COOLER_FREEZE_F
DI
1
(0001)h
Byte (8-bit)
ALM
LOW_SUCTION_A_F
ALM_LOW_SUCTION_A_F
DI
5
(0005)h
Byte (8-bit)
ALM
LOW_SUCTION_B_F
ALM_LOW_SUCTION_B_F
DI
6
(0006)h
Byte (8-bit)
ALM
HIGH_SH_A_F
ALM_HIGH_SH_A_F
DI
8
(0008)h
Byte (8-bit)
ALM
HIGH_SH_B_F
ALM_HIGH_SH_B_F
DI
9
(0009)h
Byte (8-bit)
ALM
LOW_SH_A_F
ALM_LOW_SH_A_F
DI
11
(000B)h
Byte (8-bit)
ALM
LOW_SH_B_F
ALM_LOW_SH_B_F
DI
12
(000C)h
Byte (8-bit)
ALM
COOLER_LOCK_F
ALM_COOLER_LOCK_F
DI
14
(000E)h
Byte (8-bit)
ALM
CPA1_REVERSE_ROT_F
ALM_CPA1_REVERSE_ROT_F
DI
16
(0010)h
Byte (8-bit)
ALM
CPA2_REVERSE_ROT_F
ALM_CPA2_REVERSE_ROT_F
DI
17
(0011)h
Byte (8-bit)
ALM
CPA3_REVERSE_ROT_F
ALM_CPA3_REVERSE_ROT_F
DI
18
(0012)h
Byte (8-bit)
ALM
CPB1_REVERSE_ROT_F
ALM_CPB1_REVERSE_ROT_F
DI
20
(0014)h
Byte (8-bit)
ALM
CPB2_REVERSE_ROT_F
ALM_CPB2_REVERSE_ROT_F
DI
21
(0015)h
Byte (8-bit)
ALM
LOSS_COM_MS_F
ALM_LOSS_COM_MS_F
DI
30
(001E)h
Byte (8-bit)
ALM
CCN_EMSTOP_F
CCN_EMSTOP_F
DI
31
(001F)h
Byte (8-bit)
ALM
COOL_PUMP1_F
COOL_PUMP1_F
DI
32
(0020)h
Byte (8-bit)
ALM
COOL_PUMP2_F
COOL_PUMP2_F
DI
33
(0021)h
Byte (8-bit)
ALM
REPEATED_HI_DGT_A_F
REPEATED_HIGH_DGT_A_F
DI
37
(0025)h
Byte (8-bit)
ALM
REPEATED_HI_DGT_B_F
REPEATED_HIGH_DGT_B_F
DI
38
(0026)h
Byte (8-bit)
ALM
REPEATED_LO_SST_A_F
REPEATED_LOW_SST_A_F
DI
40
(0028)h
Byte (8-bit)
ALM
REPEATED_LO_SST_B_F
REPEATED_LOW_SST_B_F
DI
41
(0029)h
Byte (8-bit)
ALM
HEAT_LOW_EWT_F
HEAT_LOW_EWT_F
DI
43
(002B)h
Byte (8-bit)
ALM
HP_SWITCH_A_F
HP_SWITCH_A_F
DI
63
(003F)h
Byte (8-bit)
ALM
HP_SWITCH_B_F
HP_SWITCH_B_F
DI
64
(0040)h
Byte (8-bit)
ALM
SENSORS_SWAP_F
SENSORS_SWAP_F
DI
97
Byte (8-bit)

ECG-UG-16-006
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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
DI
29
(001D)h
Byte (8-bit)
ALM
FLUIDE_FAIL
FLUIDE_FAIL
DI
99
(0063)h
Byte (8-bit)
ALM
FC_PROCESS_F
FC_PROCESS_F
DI
101
(0065)h
Byte (8-bit)
ALM
WL_PRESS_Z_ERROR_F
WL_PRESS_ZERO_ERROR_F
DI
1202
(04B2)h
Byte (8-bit)
ALM
WL_PRESS_TOO_LOW_F
WL_PRESS_TOO_LOW_F
DI
1203
(04B3)h
Byte (8-bit)
ALM
WL_PUMP_NO_START_F
WL_PUMP_NOT_STARTED_F
DI
1204
(04B4)h
Byte (8-bit)
ALM
WL_PRESS_ERR_RTST_F
WL_PRESS_ERROR_IN_RUNTEST_F
DI
1205
(04B5)h
Byte (8-bit)
ALM
WL_PUMP_OVERLOAD_F
WL_PUMP_OVERLOAD_F
DI
1206
(04B6)h
Byte (8-bit)
ALM
WL_LOW_FLOW_F
WL_LOW_FLOW_F
DI
1207
(04B7)h
Byte (8-bit)
ALM
WL_PRESS_CROSS_F
WL_PRESS_CROSS_F
DI
1208
(04B8)h
Byte (8-bit)
ALM
WL_LOW_PRESS_WARN_F
WL_LOW_PRESS_WARNING_F
DI
1209
(04B9)h
Byte (8-bit)
ALM
DP_A_F
ALM_DP_A_F
DI
2001
(07D1)h
Byte (8-bit)
ALM
DP_B_F
ALM_DP_B_F
DI
2002
(07D2)h
Byte (8-bit)
ALM
SP_A_F
ALM_SP_A_F
DI
2004
(07D4)h
Byte (8-bit)
ALM
SP_B_F
ALM_SP_B_F
DI
2005
(07D5)h
Byte (8-bit)
ALM
WP_IN_F
WP_IN_F
DI
2024
(07E8)h
Byte (8-bit)
ALM
WP_OUT_F
WP_OUT_F
DI
2025
(07E9)h
Byte (8-bit)
ALM
SERVICE_MAINT_ALERT
SERVICE_MAINTNANCE_ALERT
DI
3000
(0BB8)h
Byte (8-bit)
ALM
FGAS_NEEDED
FGAS_NEEDED
DI
3005
(0BBD)h
Byte (8-bit)
ALM
SIOB_A_LOW_VOLT_F
SIOB_LOW_VOLT_CIRA_F
DI
4001
(0FA1)h
Byte (8-bit)
ALM
SIOB_B_LOW_VOLT_F
SIOB_LOW_VOLT_CIRB_F
DI
4002
(0FA2)h
Byte (8-bit)
ALM
SIOB_CIR_A_COM_F
ALM_SIOB_CIR_A_COM_F
DI
4901
(1325)h
Byte (8-bit)
ALM
SIOB_CIR_B_COM_F
ALM_SIOB_CIR_B_COM_F
DI
4902
(1326)h
Byte (8-bit)
ALM
AUX1_COM_F
ALM_AUX1_COM_F
DI
4601
(11F9)h
Byte (8-bit)
ALM
FC_AUX1_COM_F
FC_AUX1_COM_F
DI
4602
(11FA)h
Byte (8-bit)

ECG-UG-16-006
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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
DI
5001
(1389)h
Byte (8-bit)
ALM
COOL_LWT_F
ALM_COOL_LWT_F
DI
5002
(138A)h
Byte (8-bit)
ALM
DEFROST_T_A_F
ALM_DEFROST_T_A_F
DI
5003
(138B)h
Byte (8-bit)
ALM
DEFROST_T_B_F
ALM_DEFROST_T_B_F
DI
5004
(138C)h
Byte (8-bit)
ALM
OAT_F
ALM_OAT_F
DI
5010
(1392)h
Byte (8-bit)
ALM
CHWSTEMP_F
ALM_CHWSTEMP_F
DI
5011
(1393)h
Byte (8-bit)
ALM
SUCTION_T_A_F
ALM_SUCTION_T_A_F
DI
5012
(1394)h
Byte (8-bit)
ALM
SUCTION_T_B_F
ALM_SUCTION_T_B_F
DI
5013
(1395)h
Byte (8-bit)
ALM
SGTC1_F
ALM_SGTC1_F
DI
5044
(13B4)h
Byte (8-bit)
ALM
SGTC2_F
ALM_SGTC2_F
DI
5045
(13B5)h
Byte (8-bit)
ALM
FC_WLOOP_F
FC_WLOOP_F
DI
5046
(13B6)h
Byte (8-bit)
ALM
FC_LWT_F
FC_LWT_F
DI
5047
(13B7)h
Byte (8-bit)
ALM
FC_OAT_F
FC_OAT_F
DI
5048
(13B8)h
Byte (8-bit)
ALM
DRV_FAN_A_F
DRV_FAN_A_F
DI
7001
(1B59)h
Byte (8-bit)
ALM
DRV_FAN_B_F
DRV_FAN_B_F
DI
7002
(1B5A)h
Byte (8-bit)
ALM
DRV_WTR_PUMP_F
DRV_WTR_PUMP_F
DI
7003
(1B5B)h
Byte (8-bit)
ALM
ILL_FACT_CONF_F
ILL_FACT_CONF_F
DI
8001
(1F41)h
Byte (8-bit)
ALM
INI_FACT_CONF_F
INI_FACT_CONF_F
DI
8000
(1F40)h
Byte (8-bit)
ALM
M_S_CONFIG_F
M_S_CONFIG_F
DI
8101
(1FA5)h
Byte (8-bit)
PROTOCOL
SP_OCC
Setpoint Occupied?
HR
0
(0000)h
Signed Integer
(32-bit)
PROTOCOL
CHIL_S_S
Net.: Cmd Start/Stop
HR
2
(0002)h
Signed Integer
(32-bit)
PROTOCOL
CHIL_OCC
Chiller occupied?
HR
4
(0004)h
Signed Integer
(32-bit)
PROTOCOL
EMSTOP
Emergency Stop
HR
6
(0006)h
Signed Integer
(32-bit)
PROTOCOL
HC_SEL
Heatcool Select
HR
8
(0008)h
Signed Integer
(32-bit)
PROTOCOL
SP_SEL
Setpoint Select
HR
10
(000A)h
Signed Integer
(32-bit)
PROTOCOL
DEM_LIM
Demand Limit
HR
12
Signed Integer

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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
HR
14
(000E)h
IEEE Float
(32-bit)
HCCONFIG
cr_sel
Cooling Reset Select
HR
18
(0012)h
Signed Integer
(32-bit)
HCCONFIG
hr_sel
Heating Reset Select
HR
20
(0014)h
Signed Integer
(32-bit)
RESETCFG
oatcr_no
OAT No Reset Value
HR
22
(0016)h
IEEE Float
(32-bit)
RESETCFG
oatcr_fu
OAT Full Reset Value
HR
24
(0018)h
IEEE Float
(32-bit)
RESETCFG
dt_cr_no
Delta T No Reset Value
HR
26
(001A)h
IEEE Float
(32-bit)
RESETCFG
dt_cr_fu
Delta T Full Reset Value
HR
28
(001C)h
IEEE Float
(32-bit)
RESETCFG
cr_deg
Cooling Reset Deg. Value
HR
30
(001E)h
IEEE Float
(32-bit)
RESETCFG
oathr_no
OAT No Reset Value
HR
32
(0020)h
IEEE Float
(32-bit)
RESETCFG
oathr_fu
OAT Full Reset Value
HR
34
(0022)h
IEEE Float
(32-bit)
RESETCFG
dt_hr_no
Delta T No Reset Value
HR
36
(0024)h
IEEE Float
(32-bit)
RESETCFG
dt_hr_fu
Delta T Full Reset Value
HR
38
(0026)h
IEEE Float
(32-bit)
RESETCFG
hr_deg
Heating Reset Deg. Value
HR
40
(0028)h
IEEE Float
(32-bit)
CP_UNABL
un_cp_a1
Compressor A1 Disable
HR
60
(003C)h
Signed Integer
(32-bit)
CP_UNABL
un_cp_a2
Compressor A2 Disable
HR
62
(003E)h
Signed Integer
(32-bit)
CP_UNABL
un_cp_a3
Compressor A3 Disable
HR
64
(0040)h
Signed Integer
(32-bit)
CP_UNABL
un_cp_b1
Compressor B1 Disable
HR
68
(0044)h
Signed Integer
(32-bit)
CP_UNABL
un_cp_b2
Compressor B2 Disable
HR
70
(0046)h
Signed Integer
(32-bit)
SETPOINT
csp1
Cooling Setpoint 1
HR
76
(004C)h
IEEE Float
(32-bit)
SETPOINT
csp2
Cooling Setpoint 2
HR
78
(004E)h
IEEE Float
(32-bit)
SETPOINT
hsp1
Heating Setpoint 1
HR
80
(0050)h
IEEE Float
(32-bit)
SETPOINT
hsp2
Heating Setpoint 2
HR
82
(0052)h
IEEE Float
(32-bit)
SETPOINT
ramp_sp
Ramp Loading
HR
84
(0054)h
IEEE Float
(32-bit)
SETPOINT
cauto_sp
Cool Changeover Setpt
HR
86
(0056)h
IEEE Float
(32-bit)
SETPOINT
hauto_sp
Heat Changeover Setpt
HR
88
(0058)h
IEEE Float
(32-bit)

ECG-UG-16-006
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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
HR
90
(005A)h
Signed Integer
(32-bit)
SETPOINT
lim_sp2
Switch Limit Setpoint 2
HR
92
(005C)h
Signed Integer
(32-bit)
SETPOINT
lim_sp3
Switch Limit Setpoint 3
HR
94
(005E)h
Signed Integer
(32-bit)
SETPOINT
min_sct
Desuperheater Min Sct
HR
96
(0060)h
IEEE Float
(32-bit)
MODBUSRS
metric
Metric Unit
HR
106
(006A)h
Signed Integer
(32-bit)
MODBUSRS
swap_b
Swap Bytes
HR
108
(006C)h
Signed Integer
(32-bit)
MODBUSRS
real_typ
Real type management
HR
110
(006E)h
Signed Integer
(32-bit)
MODBUSIP
metric
Metric Unit
HR
112
(0070)h
Signed Integer
(32-bit)
MODBUSIP
swap_b
Swap Bytes
HR
114
(0072)h
Signed Integer
(32-bit)
MODBUSIP
real_typ
Real type management
HR
116
(0074)h
Signed Integer
(32-bit)
GENUNIT
SP_OCC
Setpoint Occupied?
IR
0
(0000)h
Signed Integer
(32-bit)
GENUNIT
CHIL_S_S
Net.: Cmd Start/Stop
IR
2
(0002)h
Signed Integer
(32-bit)
GENUNIT
CHIL_OCC
Net.: Cmd Occupied
IR
4
(0004)h
Signed Integer
(32-bit)
GENUNIT
EMSTOP
Emergency Stop
IR
6
(0006)h
Signed Integer
(32-bit)
GENUNIT
CTRL_TYP
Local=0 Net.=1 Remote=2
IR
8
(0008)h
Signed Integer
(32-bit)
GENUNIT
STATUS
Running Status
IR
10
(000A)h
Signed Integer
(32-bit)
GENUNIT
min_left
Minutes Left for Start
IR
12
(000C)h
IEEE Float
(32-bit)
GENUNIT
HEATCOOL
Heat/Cool status
IR
14
(000E)h
Signed Integer
(32-bit)
GENUNIT
SP_SEL
Setpoint Select
IR
16
(0010)h
Signed Integer
(32-bit)
GENUNIT
CAP_T
Percent Total Capacity
IR
18
(0012)h
Signed Integer
(32-bit)
GENUNIT
CAPA_T
Circuit A Total Capacity
IR
20
(0014)h
Signed Integer
(32-bit)
GENUNIT
CAPB_T
Circuit B Total Capacity
IR
22
(0016)h
Signed Integer
(32-bit)
GENUNIT
DEM_LIM
Active Demand Limit Val
IR
24
(0018)h
Signed Integer
(32-bit)
GENUNIT
SP
Current Setpoint
IR
26
(001A)h
IEEE Float
(32-bit)
GENUNIT
CTRL_PNT
Control Point
IR
28
(001C)h
IEEE Float
(32-bit)
GENUNIT
ALM
Alarm State
IR
30
Signed Integer