ABB GFD233A 3BHE022294R0101 Serial Protocol for Human-Machine Exchange

ABB GFD233A 3BHE022294R0101 Serial Protocol for Human-Machine Exchange

ABB GFD233A 3BHE022294R0101 series inverter is used for transmission control; HITECH PWS3261 touch screen is used for man-machine information exchange. Related system composition block diagram shown in Figure 1. In this system, PLC Port 2 and inverter constitute MODBUS bus, through the PLC to control the three inverters to complete the system control needs, to realize the inverter speed setting, operation status monitoring and parameter exchange.

ABB GFD233A 3BHE022294R0101 ModBus communication protocol, is a serial, asynchronous master-slave communication protocol, only one device in the network can establish the protocol, other devices can only respond to the host’s query through the provision of data, or according to the query to make the corresponding action.ModBus protocol defines the format of the host’s query, which includes: master-slave address method (or broadcast). The ModBus protocol defines the format of the host query, which includes: the host-slave addressing method (or broadcast), the function code of the requested action, the transmitted data and error check, etc., or failing to complete the action requested by the host, it will organize a fault as a response.