基于PROFIBUS-DP的PLC与FR-A740交流变频器通讯的实现

Realization of Communication between PLC and Frequency-converter FR-A740

简述了由工控机、PLC、变频器组成的基于Profibus-DP总线的控制系统,详细的分析了变频器通讯前的参数设置及Profibus-DP通讯协议,并给出了编程过程及代码。

This Profibus-DP Bus based control system with the frequency converter, PLC and IPC is described brefly. The setting of the inverter beforre conmunication and the communication protocol are introduced in detail,also programming and code are discussed.