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Holding Register (Analogue Output)
Register Name
Addr
Fault/Error Code (hex)
9
[READ ONLY]
MelcoBEMS MINI (A1M)
Firmware Version
10
[READ ONLY]
Modbus Comms Counter
11
[READ ONLY]
System Type Detected
13
[READ ONLY]
Power On/Off
300
Operating Mode
301
Ventilation Mode
302
Fan Speed A
303
Temperature Setpoint A
304
Supply Air Temperature
305
[READ ONLY]
Modicon
Details
Address
0x8000 = No error
0x6999 = Bad communication with unit
40010
(Refer to indoor unit documentation for description
of other fault code values)
40011
MelcoBEMS MINI (A1M) Firmware Version
Value of a counter which increments upon every
40012
valid Modbus command received. Counter is reset
to zero when value exceeds 65535.
0 = ATA unit connected
1 = ATW system connected
40014
2 = Lossnay system connected
255 = Undetermined (no unit detected yet)
0 = Power OFF
40301
1 = Power ON
1 = Heat
3 = Cool
40302
7 = Fan
8 = Auto
0 = Lossnay mode
40303
1 = Bypass mode
2 = Auto mode
0 = Auto
1 = Speed 1
40304
2 = Speed 2
3 = Speed 3
4 = Speed 4
Temperature value in ºC multiplied by 10.
0 = 0ºC ... 400 = 40ºC
40305
Note: Only available when 'Set Temperature on
Temperature Control Unit' value = 1 or 2.
Temperature value in ºC multiplied by 10.
0 = 0ºC ... 400 = 40ºC
40306
Note: Only available when 'Supply Air Temperature
Sensor' value = 1 (Equipped).
Applicable Unit Type
#2
76
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