Word2000和S7-200PLC间的通信

The communication both Word2000 and S7-200 PLC

首先介绍了S7- 2 0 0PLC自由口通信的模式、规范及帧的格式 ,然后论述在上位机中用VB6 .0编写能进行串行通信的DLL主要步骤以及注意事项 ,最后讨论了在Word 2 0 0 0中应用DLL的方法 ,实现了PLC和Word 2 0 0 0之间的串通信。

Firstly,this paper introduces the mode,criterion and frame format of freeport of S7-200 PLC.Secondly,discuss the process and the noticeable proceeding about programming DLL using VB6.0,finally a method on applying it was proposed.By which we realized the serial communication between PLC and Word2000.