GMV5 D.C INVERTER MULTI VRF SERVICE MANUAL
310
NOTE:
The length of the CAN2 bus connecting the Modbus gateway with master ODUs should not
exceed 500 m, as shown in the following figure:
ODU system 2
Master ODU
ODU system n
Master ODU
ODU system 1
Master ODU
……
Modbus gateway
Max.: 500 m
CAN2 bus
―n‖ (n≤16) represents the quantity of the air conditioning systems.
(2) Connection of Communication Lines
Precaution!
Only serial connection is allowed for all communication lines of the Modbus gateway. The star
connection is prohibited.
1) Communication lines between the Modbus gateway and the Gree Web-based remote monitoring
and control system/BMS
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