1. Overview of Modbus(Mini) gateway
1. Function introduction
Gree Modbus (Mini) gateway can realize data exchange between air conditioning units and BMS.Provides standard Modbus RTU protocol.
This gateway is suitable for Gree's GWV5S full DC frequency conversion multi-connection, GMV5 DC frequency conversion multi-connection, GMV Water water source heat pump DC frequency conversion multi-connection, GMV ES DC frequency conversion multi-connection, GMV Tops villa-type home central air conditioner, and GMV Star home central air conditioner.
2. Appearance picture
2. Network topology diagram
illustrate:
The device address of each Modbus gateway on a Modbus bus cannot be repeated, otherwise communication will be malfunctioned!The device address range of Modbus gatewayValue: 1~255.
Network diagram description:
Modbus bus: L1 in the figure shows the Modbus bus.
CAN1 network: The network shown in the figure ③ is a CAN1 network, consisting of Modbus Gateway (Mini) and all external units and internal units of the system, one CAN1The network can access up to 80 internal units, and the bus shown in L3 in the network is the CAN1 bus.
CAN2 network: The network shown in ①② in the figure is a CAN2 network, consisting of Modbus Gateway (Mini) and the system master external unit. A CAN2 network is the most importantIt can access 16 sets of external units and 255 internal units.When there are more than 16 external units or more than 255 internal units, they need to be divided into 2 CAN2 networks. The total shown in L2 in the figureThe line is a CAN2 bus.
System: A system consists of a set of external units (a set of external units is a module group, which can be composed of 1 to 4 modules, that is, 1 to 4 external units) and its internal unitscomposition.
The number of units that can be connected to Modbus Gateway (Mini) can be connected to a Modbus Gateway (Mini) up to 16 sets of external units and 128 internal units, more than 128The desktop requires two Modbus gateways.
3. Dimensional drawing
4. Modbus Gateway (Mini) detailed introduction
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