基于VC的上位机与PLC高速通信的探讨

Discussion on High Speed Communication between PLC and VC-based Host Computer

通过上位机与S7-200系列PLC(可编程控制器)的几种通信方式的比较,重点介绍了用S i-em ens SIMATIC M icrocomputing ActiveX控件在不同的协议下与S7-200系列PLC进行高速数据通信的情况,测试各种通信时间,以寻求最快的通信方式.

By comparing several communication methods of in S7 - 200 PLC （ programmable logic controller） , this paper introduces the high speed data communication between Siemens SIMATIC Microcomputing ActiveX and the S7 - 200 PLC under different protocols, tests the time of every communication so as to find the fastest communication method.