OMRON可编程控制器与变频器的通信设计

随着数字化控制技术的日益成熟,各数字设备之间的通信问题显得尤为重要,最为常见的是可编程控制器PLC(以下简称PLC)和变频器的组合应用,实现PLC控制变频器,其中采用RS 485通讯方式实施控制的应用最广泛。RS 485通讯具有抗干扰能力强、传输速度高等优点,且设计、安装简单,大多数电气产品采用该方式进行通信。着重介绍以OM-RON CJ1系列PLC和3G3系列变频器之间利用协议宏功能实现通信,实现OMRON可编程控制器对变频器的控制。

Communication Design of OMRON Programmable Controller and Frequency Converter

Along with the gradual maturity of the numerical control technique,the problem of communication among numerical equipments becomes more important,especially,the problem of combination and application of the controller with possibly designed programs PLC and the frequency converter,the accomplishment of PLC frequency converter,applying RS 485 to carry out the control is used most extensively.The way of RS 485 communication has the following advantages as strong ability of noninterference,fast speed of transmission etc,and it is easy to design and install,and most of the electric products use this way to communicate.This paper mainly introduces the accomplishment of communication utilizing the macroscopic function of protocol between the series of PLC of OMRON CJ1 and the series of frequency converter of 3G3,and the accomplishment of the control of OMRON controller with possibly designed programs on the frequency converter.