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
Thecolumn“NVM”indicatesifthevalueisstoredinanon-volatilememory(i.e.EEPROM)whenwritingto
it.
6Wiring
Fig.1Modbuswiring
PositionDescription
1
VTCunit.
2
RJ45onPCB,seenfromthetop.
3
Terminationresistor,closetotheendoftheline.
4Modbusmaster.
7Modbusvariablelist
7.1Registersforfancontrol
NameRegister
address
RorR/W
NVMAccess
(Reg./Coil)
Description/remarks
REG_FAN_SPEED_LEVEL
101
R/W
Y
1
Reg
0:Fansoff
1:Fansonlowspeed
2:Fansonnormalspeed
3:Fansonhighspeed
4:Automode
REG_FAN_SF_FLOW_LOW
102
R/W
Y
1
Reg
Supplyairfanspeedforlowspeed
REG_FAN_EF_FLOW_LOW
103
R/W
Y
1
Reg
Extractairfanspeedforlowspeed
REG_FAN_SF_FLOW_NOM
104
R/W
Y
1
Reg
Supplyairfanspeedfornominalspeed
REG_FAN_EF_FLOW_NOM
105
R/W
Y
1
Reg
Extractairfanspeedfornominalspeed
REG_FAN_SF_FLOW_HIGH
106
R/W
Y
1
Reg
Supplyairfanspeedforhighspeed
REG_FAN_EF_FLOW_HIGH
107
R/W
Y
1
Reg
Extractairfanspeedforhighspeed
ModbusforResidentialunitsUserManual
D24810
2
SystemairSverigeAB