PLC通信协议在实时监控系统中的应用

Application of PLC communication protocol in monitor control system

利用PLC通信协议,通过计算机串行口实现了计算机与PLC间的串行数据传输,实现了计算机与PLC的实时通信,最终实现了计算机对PLC所连接设备工作状态的实时监控。还对松下公司的FP系列PLC的通信协议进行了分析,介绍了基于VB的上位机通讯程序设计思想。

This paper discusses the method of how to build simple real time monitor control system by PLC communication protocol. In addition, we briefly introduce appropriative communication protocol of FP series PLC and a method of VB program design is also introduced.