Haier CA0035EAND Service Manual page 59

2 Chiller system connect to Modbus system
The max cable length for bus A1-B1 and A2-B2 is 1000m.
17.2 Communication protocol
Transmission mode
Baud rate
Start bit
Data bits
Odd-even check
Stop bit
Modbus RTU
9600bps
57
1 bit
8 bits
Even
1 bit