MODBUS COMMUNICATIONS
HeatNet Control V3
Page 126
MODBUS
— BoilerStatus2 Flags
Bit
Description
Valid Values/Range
0
Disabled
– boiler is offline
For instance: Minimum off Time, Flow, Local Override, Calibrate etc.
0 = enabled, 1 = disabled
1
Heat Demand
0 = no demand, 1 = demand (1)
2
Alarm
An alarm or warning condition has occurred. An attempt(s) will automatically
be made to recover and resume normal operation.
0 = ok, 1 = alarm
3
Failed
A condition has occurred under which the boiler can no longer run.
0 = ok, 1 = failed
4
Member Error
An “Alarm” or “Failed” condition has occurred on one (or more) of the
member boilers.
0 = ok, 1 = error
5
Boiler Running
Main Valve is open and Modulation Delay time has expired
0 = off, 1 = running
6
Pump Running
0 = off, 1 = running
7
Spare 3 Interlock
0 = open, 1 = closed
8
LWCO Interlock (Low Water Cut Off)
0 = open, 1 = closed
9
VFD Interlock (Variable Frequency Drive)
0 = open, 1 = closed
10
Gas Prove Interlock
0 = open, 1 = closed
11
Spare 4 Interlock
0 = open, 1 = closed
12
Operator Interlock
0 = open, 1 = closed
13
Water Prove (Flow) Interlock
0 = open, 1 = closed
14
UV Sensor Air Prove Interlock
0 = open, 1 = closed
15
Main Valve
0 = closed, 1 = open
This BoilerStatus2 Heat Demand Flag is a combination of the Heat Demand input and the Modbus Heat Demand (40001).
MODBUS
— BoilerStatus3 Flags
Bit
Bit
Bit
0
AA High Fire
0 = off, 1 = on
1
Heat Demand (Local Override)
0 = off, 1 = on (1)
2
4-20mA Remote Enable
0 = off, 1 = on
3
Outdoor Air Reset Override
0 = off, 1 = on
4
T1
0 = off, 1 = on
Содержание HEATNET 3.0 Torus Series
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