Modbus协议在S7-226 PLC与伦茨变频器通信中的应用  

Application of Modbus Protocol in Communication between S7-226 PLC and Lenze Frequency Converter

作　　者：张致维[1] 张士聪[1] 王然风[1] 

机构地区：[1]太原理工大学矿业工程学院,山西太原030024

出　　处：《工矿自动化》2011年第8期142-146,共5页Journal Of Mine Automation

基　　金：山西省自然科学基金资助项目(2009011034)

摘　　要：针对采用常规开关量、模拟量控制变频器的方法存在信号远距离传输失真的问题,提出了一种应用Modbus协议对S7-226 PLC和伦茨变频器进行通信的方法,详细介绍了其通信调试步骤。实际应用表明,该方法不仅有效解决了信号远距离传输过程中的失真问题,而且在通信模式下PLC可以方便地控制变频器的运行和读取变频器的运行信息,达到了监控变频器运行状态的目的。In view of problem of distortion of signal of long-distance transmission when using conventional switch quantity,analogue control method to control frequency converter,the paper put forward a method which adopted Modbus protocol to communicate between S7-226 PLC and lenze frequency converter,introduced its communication debugging procedures in details.The actual application showed that the method can effectively resolve problem of signal in distortion process of long-distance transmission,and PLC can easily control running state of frequency converter and read running information of frequency converter under communication mode,so as to achieve purpose of monitoring of running status.

关 键 词：选煤厂 变频器 PLC 通信 MODBUS协议 

分 类 号：TD672[矿业工程—矿山机电]