Boiler Control Instruction & Operation Manual
Page 2
6
of
68
Installation
Energy Management Interface
Table 8: Modbus Signal List (continued)
Modbus
Register
Protocol
Name
Description
Read (R)/
Write (W)
10,211
CH setpoint
Status of local setpoint
R
10,453
DHW setpoint
Status of local setpoint
R
10,546
Lead Lag setpoint
Status of local setpoint
R
10,212
CH TOD setpoint
Status of local setpoint
R
10,065
CH setpoint source
0=Unknown,
1=Normal setpoint,
2=TOD setpoint,
3=Outdoor reset,
4=Remote control (4-20mA ),
7=Outdoor reset time of day
R
10,016
Active CH setpoint
-40 F (-40°C) to 266 F (130°C)
Setpoint determined by CH setpoint source (register
65).
R
10,081
DHW setpoint
source
0=Unknown,
1=Normal setpoint,
2=TOD setpoint,
5=DHW tap setpoint,
6=DHW preheat setpoint
R
10,017
Active DHW
setpoint
-40 F (-40°C) to 266 F (130°C) Setpoint determined by
DHW setpoint source (register 81).
R
10,162
Lead Lag master
setpoint source
0=Unknown,
1=CH setpoint,
2=CH TOD setpoint,
3=Outdoor reset,
4=Remote control (4-20mA ),
5=DHW setpoint,
6=DHW TOD setpoint,
7=Outdoor reset time of day,
8=Mix setpoint
R
10,018
Active LL setpoint
-40 F (-40°C) to 266 F (130°C)
Setpoint determined by LL setpoint source (register
162).
R
10,643
Low Temperature
setpoint
Setpoint entered on the local user interface.
valid range 79 F (26.1 C) to 191 F (88.3 C)
R
10,121
Low Temperature
setpoint source
0=Unknown,
1=Normal setpoint,
2=TOD setpoint,
3=Outdoor reset,
4=Remote control,
7=Outdoor reset time of day,
9=Outdoor boost
R
10,024
Active Low
Temperature
setpoint
-40 F (-40°C) to 266 F (130°C) Setpoint determined by
Low Temp setpoint source (register 121).
R
Temperature Sensors
10,007
Supply sensor
-40 F (-40°C) to 266 F (130°C)
R
10,011
Return sensor
-40 F (-40°C) to 266 F (130°C)
R
10,013
Header sensor
-40 F (-40°C) to 266 F (130°C)
R
10,014
Stack sensor
-40 F (-40°C) to 266 F (130°C)
R
10,170
Outdoor sensor
-40 F (-40°C) to 266 F (130°C)
R
15
4 - 20 mA remote
control input
mA value for S2 (J8-6) parameter selectable as
(remote set point) & (remote modulation)
R