GMV5 D.C INVERTER MULTI VRF SERVICE MANUAL
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2.1.4.2 Modbus Gateway
(1)Functions
GREE Modbus gateways for the central air conditioning system are used to bridge the internal
network of the air conditioning system (CANbus) and the monitoring network (Modbus). It will provide the
Gree web-based remote monitoring and control system/BMS communication interfaces and is enabled
to take the real-time monitoring and the long-distance control to the air conditioning system. Also, it will
provide the Modbus RTU protocol, five digital inputs and five digital outputs, among which the DI1 is
defined for the fire alarm input (when the fire alarm signal is input, the Modbus gateway will stop the air
conditioning system immediately).
Power input
Gateway
Running
Alarm Power
Address
Function
1) Interface Drawing