Gree ME30-24/E5

Modbus Gateway(Pro) Technical Service Manual
1
Chapter Ⅰ Installation
1. System Introduction
Gree Modbus Gateway(Pro) can achieve data exchange between air conditioner and BMS.
This gateway is applicable for Gree multi VRF which adopts CAN protocol. Modbus Gateway(Pro)
can collect, monitor and control operation data of multi VRF remotely and give out alarm when the
unit occurs error. Maintenance personnel doesn’t need to set each unit on site. They can check
the operation status, control startup and shutdown and set temperature of the air conditioning
system through computer, which greatly improves work efficiency and reduces human cost and
management cost.
BMS system
Other devices
Lighting
Fire control
Ventilation
Elevator
Electricity
Master
ODU
L1
Modbus
gateway 1
...
Slave ODU
...
IDU
...
L2
Master
ODU
ODU
Slave ODU
Slave ODU
IDU
IDU
IDU
IDUIDU
Modbus
gateway n
L3
L3
L3
L1
L1
CAN 1 bus
CAN 2 bus
CAN 2 network
CAN 1 network
Topology Introduction:
Modbus bus: L1 shown in the figure is the Modbus bus.
CAN1 network: which is consist of Modbus Gateway(Pro) and all IDUs and ODUs of the
system. One CAN1 network can be connected to maximum 80 IDUs.
CAN2 network: which is consist of Modbus Gateway(Pro) and main control ODU of the