PC机与PLC串口通信程序设计。PLC是采用西门子S7-200 PLC。里面包括PLC和VC程序。-PC, serial communication with the PLC programming. PLC is a Siemens S7-200 PLC. Which include the PLC and the VC process.

该VC++源程序的功能为实现上位机PC与下位机西门子S7-200型PLC的串口通讯（内附下位机S7-200型PLC程序）。-The function of VC++ source code for the host computer PC and the next crew PLC Siemens S7-200 type of serial communication (with lower machine-type PLC S7-200 program).

利用Visual C++实现PC与S7-200 PLC数字量输入与输出-Visual C++ implementation using PC and S7-200 PLC digital input and output

通过VC++编程，实现西门子S7-200 和三菱FX PLC 与上位机的通讯(Through VC++ programming, to achieve SIEMENS S7-200 and MITSUBISHI FX PLC communication with the host computer)