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CIAT AquaCIAT LD Series, User Manual

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CIAT AquaCIAT LD Series User Manual Download Page 3

 

ECG-UG-16-006

 

REVISION 

DATE 

PAGE 

AquaCIAT LD/ILD 

Modbus  

Rev A 

1/13/17 

3 OF 20 

 

Company private. Do not distribute outside of CIAT Corporation

 

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

 

Summary of Contents for AquaCIAT LD Series

Page 1: ...ECG UG 16 006 REVISION DATE PAGE 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...

Page 2: ...sion 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 Re...

Page 3: ...d 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 combin...

Page 4: ...ross 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 wit...

Page 5: ...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 u...

Page 6: ...M_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_REVERS...

Page 7: ...07 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...

Page 8: ...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 b...

Page 9: ...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 Re...

Page 10: ...er 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...

Page 11: ...0038 h IEEE Float 32 bit TEMP SST_A Saturated Suction Tmp A IR 58 003A h IEEE Float 32 bit TEMP SCT_B Saturated Cond Tmp B IR 60 003C h IEEE Float 32 bit TEMP SST_B Saturated Suction Tmp B IR 62 003E...

Page 12: ...S_B Head Pressure Position B IR 158 009E h Signed Integer 32 bit OUTPUTS EXVPosA EXV Position Circuit A IR 160 00A0 h IEEE Float 32 bit OUTPUTS EXVPosB EXV Position Circuit B IR 162 00A2 h IEEE Float...

Page 13: ...R 274 0112 h IEEE Float 32 bit PUMPSTAT drvp_pct Pump Drive Percent IR 280 0118 h IEEE Float 32 bit RUNTIME hr_mach Machine Operating Hours IR 294 0126 h IEEE Float 32 bit RUNTIME st_mach Machine Star...

Page 14: ...imit IR 436 01B4 h Signed Integer 32 bit GENCONF nh_start Night Mode Start Hour IR 438 01B6 h Signed Integer 32 bit GENCONF nh_end Night Mode End Hour IR 440 01B8 h Signed Integer 32 bit HCCONFIG both...

Page 15: ...Signed Integer 32 bit MSTSLAVE ms_activ Master Slave Ctrl Active IR 578 0242 h Signed Integer 32 bit MSTSLAVE lead_sel Lead Unit is the IR 580 0244 h Signed Integer 32 bit MSTSLAVE slv_stat Slave Chi...

Page 16: ...sct_sp_b Cir B SCT Control Point IR 826 033A h IEEE Float 32 bit DRV_CTRL drvb_pwr Cir B Fan Drive Power IR 828 033C h IEEE Float 32 bit DRV_CTRL drvb_i Cir B Fan Drive Amps IR 830 033E h IEEE Float...

Page 17: ...h Signed Integer 32 bit DEFROSTM sst_dm_b Mean SST Calculation IR 878 036E h IEEE Float 32 bit DEFROSTM delt_b Delta OAT Mean SST IR 880 0370 h IEEE Float 32 bit DEFROSTM delt_r_b Reference Delta IR...

Page 18: ...ate_of5 PowerDown 5 day mon year IR 928 03A0 h IEEE Float 32 bit LAST_POR time_of5 PowerDown 5 hour minute IR 930 03A2 h IEEE Float 32 bit PR_LIMIT sdt_m_a Discharge A Temp Average IR 932 03A4 h IEEE...

Page 19: ...ed Integer 32 bit MODBUSIP port_nbr Port Number IR 1036 040C h Signed Integer 32 bit HEADCTRL sst_min Required minimum SST IR 1042 0412 h IEEE Float 32 bit HEADCTRL pinch_sp Required Min Pinch IR 1044...

Page 20: ...er 32 bit HEADCTRL fan_a Fan Speed IR 1086 043E h IEEE Float 32 bit HEADCTRL fan_b Fan Speed IR 1088 0440 h IEEE Float 32 bit HEADCTRL now_scta Current Condensing Tmp IR 1090 0442 h IEEE Float 32 bit...

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