Gree ME30-24/E5 - Communication Connection Methods; Serial Connection Requirement; BMS Connection Diagram; Air Conditioner Connection Diagram

Modbus Gateway(Pro) Technical Service Manual
16
1.2 LED Display
LED indicators shown in the above figure are divided into two parts: status indicators
(operation, alarm, power) and communication indicators(CAN, RS485, RS232). Operation status
of each indicator is shown in the following table.
CAN
RX
When the data from the equipment (e.g. air conditioner)
connected with Modbus Gateway(Pro) is received, it will
flash.
CAN
TX
When the data is transferred to the equipment (e.g. air
conditioner) connected with Modbus Gateway(Pro), it will
flash.
RS485-1
RX
When the data from the Modbus bus is received, it will
flash.
RS485-1
TX
When the data is transferred to the Modbus bus, it will
flash.
RS232
RX
This device does not use this LED indicator.
RS232
TX
This device does not use this LED indicator.
RS485-2
RX
This device does not use this LED indicator.
…
Master
control unit
of ODU
system 1
Set as with
matched
resistance
Set as
without
matched
resistance
Master
control unit
of ODU
system 2
Master
control unit
of ODU
system n
CAN2 bus
Set as
without
matched
resistance
Set as with
matched
resistance
…
Master
control unit
of ODU
system 1
Set as with
matched
resistance
Set as
without
matched
resistance
Master
control unit
of ODU
system 2
Master
control unit
of ODU
system n
CAN2 bus
Set as
without
matched
resistance
Set as with
matched
resistance