本源代码演示了通过串口利用MPI协议与西门子PLC S7-300系统通讯的实现方式。,Demo source code through the serial port using MPI agreement with Siemens PLC S7-300 system, ways of communication.

西门子MPI协议分析,对采用VB,VC与西门子s7-300系列PLC通讯的有用-Siemens MPI protocol analysis, using VB, VC and Siemens s7-300 series PLC communication of useful