基于Socket技术的计算机与PLC通信方法研究

Research on Communication Method between PC and PLC Based on Socket Technology

介绍了利用Winsock控件的网络编程原理,分析了采用TCP协议与UDP协议的异同点,给出了一种VB平台下的计算机与PLC以太网通信方法。该方法可对网络中的PLC进行实时、有效的监控,提高PLC的控制能力。

This paper presents the principle of programmingwith Winsock control.And the differences between TCP and UDP protocols are analyzed.A communication method between PC and PLC is introduced with VB language.This method can moni- tor PLC effectively in real time and enhance control capability of PLC.