基于C++ Builder的PC与S7-200通讯在数控系统中的应用

Application of C++ Builder Based Communication between Computer & PLC In CNC System

以数控系统的监控系统为实例,介绍一种基于C++Builder的西门子S7-200系列PLC与PC机之间的串行通讯设计,并给出了通讯协议和部分软件清单。

Take the case of monitoring system of CNC system, the paper introduces the communication protocol and software design of a serial communication between Siemens S7 - 200 PLC and PC based on C ＋ ＋Builder.