Input Registers - Procon A1M Installation Manual

12.2.

Input registers

Input Registers are read using function code 04.
Input Register (Analogue Input)
Register Name Addr
Fault/Error Code (hex) 1
MelcoBEMS MINI (A1M)
3
Firmware Version
Modbus Comms Counter 5
Fault Code (decimal) 8
System Type Detected 9
Own Refrigerant Address 25
Defrost 26
Residual Heat Removal 27
Refrigerant Error Info 28
Modicon
Details
Address
0x8000 = No error
0x6999 = Bad communication with unit
30002
(Refer to indoor unit documentation for description
of other fault code values)
30004 MelcoBEMS MINI (A1M) Firmware Version
Value of a counter which increments upon every
valid Modbus command received. Value will
30006
automatically reset to zero when value exceeds
65535.
8000 = No error
6999 = Bad communication between A1M and unit
30009
(Refer to unit documentation for description of other
fault code values)
0 = ATA unit connected
1 = ATW system connected
30010
2 = Lossnay system connected
255 = Undetermined (no unit detected yet)
30026 0 ... 32
0 = Normal
1 = Standby
30027
2 = Defrost
3 = Waiting Restart
0 = Normal
30028 1 = Prepared
2 = Residual Heat Removal
0 = Normal
1 = Error (System)
30029
2 = Error (Startup)
3 = Maintenance Error
Applicable Unit Type
#2 #2 #2
55