ATH HEATNET KN Series, Operation Instructions Manual, Page: 134 / 144

MODBUS COMMUNICATIONS HeatNet Control REV 3.47-1
Page 134
Figure 63 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).