Haier MRV 5-RC VP1-112B Service Manual page 156

④ BM4 introduction: Group class (physical master unit is valid)
ModeBus
BM4_1
Centralized control
BM4_2
protocol selection
BM4_3 Reserved
BM4_4 ModeBus
~ centralized control
BM4_8 communication
address
BM4_1 BM4_2
OFF OFF
OFF ON
ON OFF
ON ON
OFF
BM4_4 BM4_5 BM4_6
OFF OFF OFF
OFF OFF OFF
OFF OFF OFF
OFF OFF OFF
OFF OFF ON
OFF OFF ON
OFF OFF ON
OFF OFF ON
OFF OFF OFF
OFF OFF OFF
... ... ...
ON ON ON
153
Protocol selection
Third party standard MODBUS protocol (default)
Computer management protocol
Specific centralized control protocol
Reserved
Reserved
BM4_7 BM4_8
OFF OFF
OFF ON
ON OFF
ON ON
OFF OFF
OFF ON
ON OFF
ON ON
OFF OFF
OFF ON
... ...
ON ON
ModeBus set control
communication address
(IGU02 using the address
in brackets)
Address1 (0)
Address 2 (1)
Address 3 (2)
Address 4 (3)
Address 5 (4)
Address 6 (5)
Address 7 (6)
Address 8 (7)
Address 9 (8)
Address 10 (9)
......
Address 32 (31)