Gree VRF, Service Manual

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Gree VRF Protocol Gateway
4
Remarks :
（
1
）
One 485 bus can connect to 254 gateways at most, if there a re other 485 equipment
in the 485 bus, the connectable gateway should reduce accordingly.
（
2
）
It is recommended that the connecting quantity of gateway of 485 bus n is less or
equal to 16.
2 Introduction to Parts
2.1 Parts List
S=standard fittings; O=prepared by user; P=purchased by user
Name Model Material Code Remarks Supply Range
VRF Protocol
Gateway kit
Gateway components
ME30-24/D1(BM)
NC20000160

Can connect to BMS

Protocol interfaces: Modbus
protocol, CAN protocol,
BACnet protocol

Hardware interface: RS485,
CAN, Ethernet

485 communication baud rate
9600, start bit 1 bit, data bit 8
bits, no parity bit, stop bit 1 bit

TCP communication:
gateway Modbus TCP fixed
interface: 502

UDP port in BACnet/IP mode:
BAC0

Major components: gateway,
instruction manual
S
Optical isolation
relay
Optical isolation relay
RS485
LN02200010
The total distance of the
communication cable needs to add
a relay every time it exceeds 800
meters, and it needs to add a relay
every time the quantity of Modbus
gateway exceeds 30. It needs to
be adopted when the conditions
are met.
P
Optical isolation
convertor
Optical isolation
convertor GD01
LN02200020
Only when BMS dopts RS232
method should the convertor be
adopted
P
Centralized control
cabinet
Prepared by user - - O
2.2 Gateway ME30-24/D1(BM)
2.2.1 Introduction of Functions
Gree multi VRF protocol gateway ME30-24/D1(BM) can realize data exchange between air
conditioner and BMS, providing standard Modbus RTU, Modbus TCP and BACnet/IP building
interfaces. The gateway is applicable to the Gree multi VRF unit model that adopts CAN protocol.