C#编写的与西门子PLC1200之间，通过socket进行的通讯-C# with Siemens PLC1200, communication through the socket

里面包含西门子PLC,S7通讯协议，可以通讯plc1500，plc1200,内含源码(It contains Siemens PLC and S7 communication protocol, which can communicate with plc1500 and plc1200, including source code)