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22 

Modbus  

Modbus RTU and Modbus TCP/IP are both standard.  
Default Modbus TCP/IP IP: 192.168.2.1, Default Modbus RTU: Baud-57600, Data Length-8, Parity-Odd, Stop Bits-1. 
 

Table 9 – Modbus Table 

Types 

Index 

Size  Variable Name 

Data Type 

Coil 0 

HMI_START 

Bool 

Coil 1 

SYSTEM_RUNNING 

Bool 

Coil 2 

HMI_STOP 

Bool 

Coil 3 

SYSTEM_STOPPING 

Bool 

Coil 4 

COMPRESSORS_RUNNING 

Bool 

Coil 4 

SYSTEM_NOT_RUNNING 

Bool 

Coil 5 

PHASE_OK 

Bool 

Coil 10 

CKT1_DEMAND_REQUEST Bool 

Coil 11 

CKT1_COMPRESSORS_RUNNING Bool 

Coil 12 

CKT2_DEMAND_REQUEST Bool 

Coil 13 

CKT2_COMPRESSORS_RUNNING Bool 

Coil 20 

AL_ALARMS_PRESENT 

Bool 

Coil 21 

AL_GENERAL_ALARMS 

Bool 

Coil 22 

AL_CRITICAL_ALARM 

Bool 

Coil 23 

AL_PHASE_LOSS.Active 

Bool 

Coil 24 

AL_FREEZESTAT.Active 

Bool 

Coil 25 

AL_CKT1_FREEZESTAT.Active 

Bool 

Coil 26 

AL_CKT2_FREEZESTAT.Active 

Bool 

Coil 27 

AL_EVAP_FLOW.Active 

Bool 

Coil 28 

AL_CKT1_EVAP_FLOW.Active 

Bool 

Coil 29 

AL_CKT2_EVAP_FLOW.Active 

Bool 

Coil 30 

AL_CKT1_RFRG_ALARM 

Bool 

Coil 31 

AL_CKT2_RFRG_ALARM 

Bool 

Coil 32 

AL_CKT1_CRITICAL_ALARM Bool 

Coil 33 

AL_CKT2_CRITICAL_ALARM Bool 

Coil 34 

AL_PROCESS_PUMP_OVLD.Active Bool 

Coil 35 

AL_STANDBY_PUMP_OVLD.Active 

Bool 

Coil 36 

AL_CKT1_LPS.Active 

Bool 

Coil 37 

AL_CKT2_LPS.Active 

Bool 

Coil 38 

AL_CKT1_LLPS.Active 

Bool 

Coil 39 

AL_CKT2_LLPS.Active 

Bool 

Coil 40 

AL_CKT1_DISCHARGE_PX_SOFT_FAULT.Active Bool 

Coil 41 

AL_CKT2_DISCHARGE_PX_SOFT_FAULT.Active Bool 

Coil 42 

AL_CKT1_HPS.Active 

Bool 

Coil 43 

AL_CKT2_HPS.Active 

Bool 

Coil 44 

AL_COMP1A_STATUS_FAULT.Active 

Bool 

Coil 45 

AL_COMP2A_STATUS_FAULT.Active 

Bool 

Coil 46 

AL_COMP1B_STATUS_FAULT.Active 

Bool 

Coil 47 

AL_COMP2B_STATUS_FAULT.Active 

Bool 

Coil 48 

AL_HIGH_HIGH_RETURN_FLUID_TEMP.Active 

Bool 

Coil 49 

AL_HIGH_HIGH_SUPPLY_FLUID_TEMP.Active 

Bool 

Coil 50 

AL_LOW_LOW_SUPPLY_FLUID_TEMP.Active 

Bool 

Coil 51 

AL_CKT1_EXCESSIVE_PUMP_DOWN_CYCLING.Active 

Bool 

Coil 52 

AL_CKT1_PUMP_DOWN_FAULT.Active Bool 

Coil 53 

AL_CKT2_EXCESSIVE_PUMP_DOWN_CYCLING.Active 

Bool 

Coil 54 

AL_CKT2_PUMP_DOWN_FAULT.Active Bool 

Coil 55 

HIGH_SUPPLY_WATER_TEMP_WARNING 

Bool 

Coil 56 

LOW_SUPPLY_WATER_TEMP_WARNING Bool 

Coil 57 

HIGH_RETURN_WATER_TEMP_WARNING 

Bool 

 

 

Summary of Contents for Accuchiller KSE

Page 1: ......

Page 2: ......

Page 3: ...reen Navigation 7 System Initialization 7 Figure 5 Start Up Splash Screen 7 Home Chiller Home Screen 8 System Overview 8 Figure 6 Chiller Home Screen 8 Table 1 System Overview Functions 8 Starting and...

Page 4: ...igital Outputs Screen 14 Menu 1 User Setup 14 Figure 33 User Setup Menu 1 Screen 14 Figure 34 User Setup Menu 2 Screen 14 Figure 35 User Setup Menu 3 Screen 14 User Setup Alarm Setup 15 Figure 36 User...

Page 5: ...ser Setup Primary Secondary Setup Screen 19 User Setup Chiller Capacity 20 Chiller Capacity Screen 20 Figure 50 User Setup Chiller Capacity Setup Screen 20 User Setup Date Time 20 Date Time Screen 20...

Page 6: ...erant Valves 26 Step 5 Check Low Temperature Alarm 26 Step 6 Turn On Control Power 26 Step 7 Establish Coolant Flow 26 Step 8 Initial Unit Operation 27 Preventive Maintenance 27 Once a Week 27 Once a...

Page 7: ...rant for heat transfer purposes This chemical is sealed and tested in a pressurized system containing ASME coded vessels however a system failure will release it Refrigerant gas can cause toxic fumes...

Page 8: ...aining or repairing the equipment to protect against any sparks debris or fluid leaks Pre Installation Receiving Inspection When the unit arrives verify the information on the unit nameplate agrees wi...

Page 9: ...e the clearance on the control panel side to 4 feet while still meeting NEC code and without impeding performance When installing multiple chillers in the same location the minimum separation between...

Page 10: ...4 Figure 3 Mounting Platform Figure 4 Rigging...

Page 11: ...e main terminal block energizes the entire electric circuitry of the unit A power supply provides 24 VDC control power Shut off the electric power at the main disconnect before opening access panels f...

Page 12: ...f the compressor with incorrect electrical phase sequencing will result in mechanical damage to the compressors Check the phasing with a phase sequence meter prior to applying power The proper sequenc...

Page 13: ...assword protected to prevent unintended changes There are two levels of security Username is case sensitive User Level Password 9999 Supervisor Level Password 7720 When navigating screens any user adj...

Page 14: ...h circuit None Status Messaging Provides information about any warnings or alarms which may have occurred None Setpoint Modify the Setpoint by touching the current Setpoint on the HMI An authorized se...

Page 15: ...em Some parameters are password protected The main User level password is for gaining access to changing the main system set point and various other warning and alarm settings A few higher level areas...

Page 16: ...uld appear in this window Warning Glycol If the Chiller Setpoint goes below 45 F the Glycol Warning Screen will appear as in Figure 12 The amount of antifreeze will vary depending on the actual desire...

Page 17: ...rious portions of the system Figure 13 Diagnostics Menu Screen Figure 14 Diagnostics Circuit Details Screen Figure 15 Diagnostics Circuit Interlock Screen Figure 16 Diagnostics Pumps Screen Figure 17...

Page 18: ...ontrol program and provide some level of supervisory control to some operating parameters the control system includes some security level protections Figure 20 Security Menu Figure 21 Security Log In...

Page 19: ...ts Outputs The Input Output screens display the status of the various system inputs and outputs This provides a detailed level of information for monitoring system operation and for diagnosing any per...

Page 20: ...Digital Outputs Screen Menu 1 User Setup The control system allows for customization and adjustment of many parameters In most cases the factory default settings are sufficient however adjustment of p...

Page 21: ...he fault trigger will occur Supply 0 0 F Evap 38 0 F Startup Bypass Delay time once the system has started before monitoring High and Low temperature Alarms 1200 sec Flow Delay Flow Sensor fault delay...

Page 22: ...line temperature is the superheat Figure 39 User Setup EEV Control Setup Screen Table 4 EEV Control Setup Parameters Menu Item Description Default Value Mode Selection In Auto Mode the control system...

Page 23: ...cess value drops below the set point by this differential all compressors turn off 5 F Stage to Stage Delay This is the minimum delay duration between stages on multiple compressors During this time d...

Page 24: ...setpoint relating to low percent setpoint During the start sequence 45 F 7 C User Setup Dynmic Lift Setup Dynamic Lift Setup Screen The Dynamic Lift control logic adjusts the chiller head pressure to...

Page 25: ...its Setup Screen User Setup Remote Setpoint When the remote setpoint option is active an incoming 4 20mA or 0 10VDC signal controls the setpoint of the master chiller The signal will span from the MIN...

Page 26: ...e fields for adjustment The time is automaticity saved Figure 51 User Setup Date Time Setup Screen User Setup Pump Down Pump Down Screen This screen allows for adjustments to the pump down sequence Th...

Page 27: ...y start if a power outage has occurred during a run state When active the Automatic Start toggle will indicate Automatic Start Enabled and when not active it will indicate Automatic Start Disabled Fig...

Page 28: ...AL_CKT2_RFRG_ALARM Bool Coil 32 1 AL_CKT1_CRITICAL_ALARM Bool Coil 33 1 AL_CKT2_CRITICAL_ALARM Bool Coil 34 1 AL_PROCESS_PUMP_OVLD Active Bool Coil 35 1 AL_STANDBY_PUMP_OVLD Active Bool Coil 36 1 AL_C...

Page 29: ...eal InputRegister 32 2 CKT2_EXV_PERCENT Real InputRegister 34 2 CKT1_RFRG_SUCTION_TEMP_HMI Real InputRegister 36 2 CKT2_RFRG_SUCTION_TEMP_HMI Real InputRegister 38 2 CKT1_SUCTION_PRESSURE_HMI Real Inp...

Page 30: ...compressor s crankcase heater Disconnect main power only when servicing the chiller The crankcase heater should remain on when the compressor is off to ensure liquid refrigerant does not accumulate i...

Page 31: ...0 2 ppm Ammonium NH3 Less than 2 ppm Chlorides Cl Less than 300 ppm Electrical Conductivity 10 500 S cm Free aggressive Carbon Dioxide CO2 Less than 5 ppm Free Chlorine Cl2 Less than 1 PPM HCO3 SO4 2...

Page 32: ...will be operating Also ensure the process coolant has sufficient freeze protection glycol to handle at least 5 F below the Low Temperature Alarm setting All chillers are shipped from the factory with...

Page 33: ...e procedures as closely as possible Specific site conditions may require repeating certain tasks more frequently The importance of a properly established preventive maintenance program cannot be overe...

Page 34: ...tem refrigerant charge and verify the system is still full charged 18 Check the operation of the compressor crankcase heater Energize the heater while the compressor is off Taking an amp reading of th...

Page 35: ...ge service valve is fully or partially closed Open valve all the way Refrigerant circuit overcharged Contact refrigeration service technician High refrigerant pressure sensor Replace if faulty PLC inp...

Page 36: ...s Compressor 2 L2 Amps Compressor 2 L3 Amps Compressor 3 L1 Amps Compressor 3 L2 Amps Compressor 3 L3 Amps Compressor 4 L1 Amps Compressor 4 L2 Amps Compressor 4 L3 Amps Refrigerant Circuit 1 Superhea...

Page 37: ...31 Notes...

Page 38: ...32...

Page 39: ......

Page 40: ...t Sales Customer Service Parts Department 847 966 2260 info thermalcare com 847 966 2260 847 966 2636 847 966 8560 847 966 9358 fax www thermalcare com sales thermalcare com service thermalcare com tc...

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