基于MODBUS协议实现单片机与变频器的通信

Communication Between MCU and VFD Based on the Modbus Protocol

本文介绍采用MODBUS协议中的ASCII模式实现单片机与变频器的通信。单片机做作为上位机,变频器作为下位机,通过RS485接口实现单片机与变频器的通信,有效且经济地实现单片机对交流电机的控制。

This paper discusses the communication between the single-chip computer and the variable frequency converter by using the ASCII moed of the Modbus protocol. The RS485 serial port＇s connection is used to implement the communication, to control an AC motor.