NRT405F901 manual
Chapter 17
Modbus signals
39
Holding register
Name of signal
Type
Modbus
address
Default setting
Description
Not used in this model
X,3
1-2
-
RC_Setp_X.NRTHeatOutputSelect
X,3
3
2
Manual/Auto heating
output
RC_Setp_X.NRTCoolOutputSelect
X,3
4
2
Manual/Auto cooling
output
RC_Setp_X.NRTFanSelect
X,3
5
4
Select fan mode:
0 = Off
1 = Manual speed 1
2 = Manual speed 2
3 = Manual speed 3
4 = Auto
RC_Setp_X. NRTFanControlMode
X,3
6
3
Select fan control:
0 = No control
1 = The fan is controlled by
heating requirement
2 = The fan is controlled by
cooling requirement
3 = The fan is controlled by
both heating and cooling
requirement
RC_Setp_X.NRTFanSpeed1Start
X,3
7
20
Controller output signal in
% for fan speed 1
RC_Setp_X.NRTFanSpeed2Start
X,3
8
60
Controller output signal in
% for fan speed 2
RC_Setp_X.NRTFanSpeed3Start
X,3
9
100
Controller output signal in
% for fan speed 3
RC_Setp_X.NRTFanSpeedHyst
X,3
10
5
Controller output signal
hysteresis start/stop fan
speed
RC_Setp_X.NRTFanSpeedMax
X,3
11
3
Number of fan speeds (1-3)
Not used in this model
X,3
12
-
RC_Setp_X.NRTChangeOverSelect
X,3
13
2
Manual/Auto Change-over
(0=Heating, 1=Cooling,
2=Auto)
RC_Setp_X.NRTRemoteState
X,3
14
5
Used for remote control:
0 = Off
1 = Economy/Standby
2 = Economy/Standby
3 = Presence
5 = No remote control
RC_Setp_X.NRTUnitReturnState
X,3
15
-
Pre-set running mode:
0 = Off
1 = Standby
RC_Setp_X.NRTUnitShutDownState
X,3
16
0
Shutdown mode:
0 = Off
1 = Standby
Not used in this model
X,3
17
-
