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针对控制系统中上位机与S7-300系列PLC通信的实际问题,总结了几种监控计算机与S7-300系列PLC的通信方法,这几种方法在不同的控制系统中能较好的解决监控计算机与S7-300系列PLC的通信问题。
In view of the actual problem that the upper computer of the control system communicates with S7-300 series PLC, summed up several kinds of communication methods of monitoring computer and S7-300 series PLC, these kinds of methods can better solve the problem of monitoring computer in different control systems Communication problems with S7-300 series PLCs.