ATH HeatNetKN-10, User Manual

Page: 81 / 108

MODBUS COMMUNICATIONS HeatNet Control V3 2.x
Page 81
Figure 41 MODBUS Input Variables (Read Only)
Address Name
Raw Data
Type
Scale Description Valid Values/Range
3) A calculated setpoint if running in
Outdoor Air Reset Mode
4) The 4-20ma (0-10V) setpoint.
30241 AvailableBoilers
16 bit signed
---
The maximum number of boilers available
to fire.
0 - 16
30242 BTUHigh16
32 bit unsigned
30243 BTULow16
30247 SystemReturnTemp 16 bit signed ---
The system return temperature (if
available). See BoilerStatus4 to determine
if the sensor is present.
32
– 250 °F
30265
SystemFlowHigh16
32 bit unsigned 0.01
Boiler SystemFlow High (Upper) and Low
(Lower) 16 bit registers. To get Boiler
SystemFlow High (Upper) and Low (Lower)
16 bit registers. To get the actual
SystemFlow, the high and low 16 bit
registers must be combined (concatenated)
into a single 32 bit counter as:
SystemFlowHigh16: SystemFlowLow16
Example
SystemFlow = ((SystemFlowHigh16 *
65536) + SystemFlowLow16) * 0.01
This value is either the system flow meter
reading or the value written to the
BMSFlowRateGPM register by the BMS.
0-1500 GPM
30266 SystemFlowLow16
30269 HeatingBoilersOn 8 bit unsigned ---
The number of boilers currently running for
heating.
0
– 16
30270 DHWBoilersOn 8 bit unsigned ---
The number of boilers currently running for
DHW.
0
– 16
30271 ManualBoilersOn 8 bit unsigned ---
The number of boilers currently running
due to a local override, T1, T2, AA/High
Fire, etc.
0
– 16
Figure 42 MODBUS
— BoilerStatus1 Flags
Bit Description Valid Values/Range
0 Pilot Valve 0 = closed, 1 = open
1 Blower Running 0 = off, 1 = running
2 Ignition Alarm 0 = ok, 1 = alarm
3 Valve Alarm 0 = ok, 1 = alarm
4 High Limit 0 = ok, 1 = tripped
5 Air Prove Switch 0 = open, 1 = closed
6 RESERVED (FACTORY)
7 Software Operator 0 = off, 1 = on
8 Header Sensor not Detected 0 = detected, 1 = not detected
9 Supply Sensor not Detected 0 = detected, 1 = not detected