User guide

AM Series Modbus Interface Manual
1.4 PRE-DEFINED DEVICES
1.4.1 General Notes
For all devices, empty or not, available holding registers return 0. When it is not implemented,
requests can be ignored by the Modbus device.
Holding registers below 99 are reserved for legacy devices, and are optional. The functionality of
these registers is not changed or influenced by this specification.
1.4.2 Managing Boiler
Managing Boiler Parameters
Holding
Register
Access
Parameter Name
Automatic
Conversion
Range
R
W
100 0064 X X
Modbus Units
- Bit0: °C / °F Bit1: bar / psi
101 0065 X - Device type -
1 = Managing / Stand-alone
Boiler
102 0066 X - State - See state table
103 0067 X - Status - See status table
104 0068 X - Error Code - See error list
105 0069 X - Warning Code - See warning list
106 006A X X
Boiler CH setpoint
V Depending on units °C / °F
107 006B X X
Boiler DHW setpoint
V Depending on units °C / °F
108 006C X X
Boiler operation
- 0..x
109 006D X X
DHW type
- 0..x
110 006E X X
CH mode
- 0..x
111 006F X X
DHW mode
- 0..x
112 0070 X - Supply temperature V Depending on units °C / °F
113 0071 X - Return temperature V Depending on units °C / °F
114 0072 X - DHW temperature V Depending on units °C / °F
115 0073 X Flue gas temperature V Depending on units °C / °F
116 0074 X Heat exchanger temperature V Depending on units °C / °F
117 0075 X Firing Rate V 0..100%
118 0076 X Min Firing Rate V 0..100%
119 0077 X Flame current V 0..x uA
120 0078 X Water pressure V Depending on units 0..x bar/psi
121 0079 X Analog in V 0..10,0V
122 007A X Analog out V 0..10,0V
OMM-0102_0A AERCO International, Inc. • 100 Oritani Dr. • Blauvelt, NY 10913 Page 9 of 18
GF-146-MB Phone: [phone] PRI: 09/22/2014