PLC与变频器间的通信实现  

Realization of Communication between PLC and Frequency-converter

作　　者：黄金凤[1] 张进[1] 李占贤[1] 孙淑惠[1] 

机构地区：[1]河北理工大学,河北唐山063009

出　　处：《工矿自动化》2007年第5期95-97,共3页Journal Of Mine Automation

基　　金：中国博士后科学基金资助项目(2005038467)

摘　　要：文章讨论了PLC与采用MODBUS通信协议的变频器的通信原理及其实现,介绍了变频器的速度控制方式及其所采用的通信协议、PLC无顺序通信协议等技术。并以三菱Q系列PLC及串行通信模块对安川G7变频器的控制为例,研究如何用串行通信协议实现PLC与变频器之间的通信。In this paper, the principle and realization method of communication between PLC and frequency-converter with Modbus communication protocol were discussed. The speed control method and the communication protocol of frequency-converter and PLC non-sequence communication protocol were introduced. With the example of control to YASKAWA Varispeed G7 by MITSUBISHI Q series PLC and its communication module, it studied how to implement the communication between PLC and frequencyconverter by serial communication protocol.

关 键 词：变频器 通信协议 MODBUS PLC RS485 

分 类 号：TN915.04[电子电信—通信与信息系统]