Modbus for residential D24810 User manual(A007)
Table Of Contents
- 1 Introduction
- 2 Transmission modes
- 3 Physical layer
- 4 Address
- 5 Notes
- 6 Wiring
- 7 Modbus variable list
- 7.1 Registers for fan control
- 7.2 Registers for heater control
- 7.3 Registers for the damper
- 7.4 Registers for the rotor
- 7.5 Registers for RH sensor
- 7.6 Registers for the week program
- 7.7 Registers for system parameters
- 7.8 Registers for clock
- 7.9 Registers for the filter
- 7.10 Registers for VTC defrosting
- 7.11 Register for VR/VTR defrosting
- 7.12 Registers for the digital inputs
- 7.13 Registers for PCU-PB
- 7.14 Registers for alarms
- 7.15 Register for demand control
- 7.16 Register for wireless network
- 7.17 Registers for RH transfer control
7.10RegistersforVTCdefrosting
NameRegister
address
RorR/W
NVMAccess
(Reg./Coil)
Description/remarks
REG_DEFR_STATE_VTC
651RReg
Stateofdefrostingstatemachine.
0:Nodefrostingongoing
2:Bypassdefrosting
3:Stopdefrosting
4:Defrosterror
REG_DEFR_CONFIGURATION
652RReg
Defrostingconguration.
0:A
1:B
2:C(nolongersupportedbyPCU-EC4)
3:D(nolongersupportedbyPCU-EC4)
REG_DEFR_UNBAL_ALLOWED
653
R/W
Y
Reg+CoilCoil10433:Unbalanceallowed.
0:Unbalancenotallowed.
1:Unbalanceallowed.
REG_DEFR_MODE_VTC
654
R/W
YReg
Defrostingmode.
Allowedvalues:
IfnoRHsensorispresent:1–5.
IfRHsensorispresent:1–3,
correspondingtoSoft,Normaland
Hard.
REG_RH_SENSOR_PRESENT
655
R/W
Reg
SettingofpresenceofRHsensor.
0:Sensorisnotconnected,orthesensor
isconnectedbutshallnotbeused.
1:Sensorisconnectedandshallbeused.
7.11RegisterforVR/VTRdefrosting
NameRegister
address
RorR/W
NVMAccess
(Reg./Coil)
Description/remarks
REG_DEFR_STATE_VR
671RReg
Stateofdefrostingstatemachine.
0:Inactive
1:Lowtemperature
2:Defrosting
REG_DEFR_MODE_VR
672
R/RW
YReg
Defrostingmode.
Allowedvalues:0-5.
ModbusforResidentialunitsUserManual
D24810
11
SystemairSverigeAB