交互通信机制，从而实现PLC对虚拟控制对象的常规实验控制和程序验证，最终建立

一套完整虚拟仿真实验项目。

关键词：PLC  VB  虚拟控制对象

Abstract: Virtual control objects are designed by using the VB software in this paper. An

interaction and communication mechanism between VB and PLC is established by using the

protocol conversion module. The conventional experimental control and program verification can

be realized by the PLC and virtual control objects.

Key words: PLC VB Virtu