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1.3.2.3
Setting of Communication Connection
(1) Communication wire connection between Modbus Gateway(Mini) and BMS:
Step 1: Confirm the first Modbus Gateway(Mini) (Modbus Gateway(Mini)1 as shown in the figure) that needs to be connected to
BMS. Connect the port of RS485 of this gateway and the BMS with communication cable, as shown in step ① in the figure.
Step 2: Connect the RS485 communication port of Modbus Gateway(Mini) (Modbus Gateway(Mini)1) with the RS485-
communication port of the second Modbus Gateway(Mini) (Modbus Gateway(Mini)2 as shown in the figure) with communication
cable; as shown in step ② in the figure.
Step 3: The other Modbus Gateway(Mini)shall be connected in series; as shown in step ③ in the figure.
（2）Communication wire connection between Modbus Gateway(Mini) and air conditioner:
Step 1: Confirm the master ODU that each Modbus Gateway(Mini) shall be connected (set master ODU with SA8 DIP). Please
refer to “
Communicaiton connection between Modbus Gateway(Mini) and air conditioner” and adopt series connection,
as shown
in step ④ in the figure.
Step 2: Connect the G1 and G2 port of CAN communication interface of Modbus Gateway(Mini) and the G1 and G2 port of
wiring board of corresponding master ODU with communication cable, as shown in step ⑤ in the figure.
※ CAN2 network: Detailed meaning please refer to topology introduction.
（3）Modbus Gateway(Mini) DIP setting:
Modbus Gateway(Mini)
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