基于OPC技术的上位机与西门子PLC的通信

Communication between PC and Siemens PLC based on OPC technology

OPC是一种被广为接受的开放式的工业通信标准,在工业控制领域越来越得到广泛应用。本文介绍了基于OPC技术上位机VB程序与西门子PLC通信的实现过程,PC机能实时监控变频调速风机系统。VB不仅是上位机监控组态程序,也是OPC的客户端,需要开发OPC客户端的应用程序,实现上位机与PLC的通信。

OPC is a industrial communication standard accepted widely,and it is applied widely in the industrial controlling field. This paper introduces the realization process of communication between PC and Siemens PLC based OPC technology.PC can watch and control the speed converted fan system on real time.VB is the configuration software on PC,and it is also the client of OPC.We must compile the program to realize the communication between PC and PLC.