NRT405F901 manual Chapter 17 Modbus signals 38
Input register
Name of signal Type
Modbus
address
Description
RC_Actual_X.NRTSoftware X,4 1 Type of NRT software:
0 = Not used
RC_Actual_X.NRTVerMajor X,4 2 Major version
RC_Actual_X.NRTVerBranch X,4
4
Branch version
RC_Actual_X.NRTRevision X,4 5 Revision
RC_Actual_X.NRTUnitState X,4 7 Current running mode:
0 = Off
1 = Economy (Unoccupied)
2 = Not used (Stand-by)
3 = Not used (Occupied)
RC_Actual_X.NRTControllerState X,4 8 Current control:
0 = Off
1 = Heating
RC_Actual_X.NRTFanSpeed X,4 9 Current fan speed:
0 = Off
1 = Fan speed 1 active
2 = Fan speed 2 active
3 = Fan speed 3 active
Not used in this model X,4 10
RC_Actual_R.NRTRoomTempExt R,4 12 Room temperature from external sensor
RC_Actual_R.NRTRoomTempInt
Room temperature from internal sensor
RC_Actual_R.NRTAIChangeOver R,4
14
Change-over temperature
RC_Actual_R.NRTAnaIn1 R,4 15 Value on analogue input 1
Value on universal analogue input 1
RC_Actual_R.NRTUAnaOut1 R,4 17 Value on universal analogue output 1
Value on universal analogue output 2
RC_Actual_R.NRTSetPAdjustment R,4
19
Setpoint adjustment from internal unit
RC_Actual_R.NRTPIDSetP R,4 20 Controller setpoint
Controller output signal (0…100 %)
RC_Actual_R.NRTHeatOutput R,4 22 Heating output signal (0…100 %)
RC_Actual_R.NRTCoolOutput
Cooling output signal (0…100 %)
RC_Actual_R.NRTAI1Raw R,4
24
Raw value for analogue input 1
RC_Actual_R.NRTUI1Raw R,4 25 Raw value for universal input 1
RC_Actual_R.RoomTemp_NRT2 R,4 26 Room temperature input value from secondary
internal sensor