PLC与变频器的RS-485串行通信控制  

The RS-485 serial communication technology between PLC and frequency converter

作　　者：周宇[1] 梅顺齐[1] 

机构地区：[1]武汉科技学院,湖北武汉430073

出　　处：《机械研究与应用》2009年第2期109-111,共3页Mechanical Research & Application

摘　　要：基于RS-485串行通信技术,研究了利用欧姆龙CP1H可编程控制器和三菱FR-E540变频器的串行通信功能,搭建变频调速控制系统,实现可编程控制器对变频器的上位控制。介绍了控制系统中串行通信协议的写法,硬件的设置,并给出了变频调速编程的实例。实验证明利用RS-485通信协议搭建的控制系统具有接线简单,控制精度高,抗干扰能力强的优点。Based on the RS-485 serial communication technology, utilizing the serial communication technology of OMROIN CP1H programmable logic controller and Mitsubishi FR -E.540 frequency converter are researched to put up a frequency con- version control system, realizing PLC upper control for frequency converter. The writing method of the communication protocol, the hardware setting are introduced, and a frequency conversion programming example is given. The experiment proved that using the serial communication technology can make control system easy connection, high control accuracy and strong anti - interference.

关 键 词：可编程逻辑控制器(PLC) 变频器 RS-485串行通讯 控制系统 

分 类 号：TN773[电子电信—电路与系统]