自由通信口协议在恒温装置中的应用

The Application of Freeport Mode in Thermostat

利用S7-200PLC(可编程控制器)的自由通信口协议功能,由VB实现PLC与PC上位机的通信,达到对恒温装置监控的目的,叙述了从硬件连接到软件编程的过程。

This paper gives the process of hardware linking and software programming by using the function of the Freeport mode of the S7-200 programmable logic controller,including a communication between the PLC and the OC built by VB,and the thermostat monitored and controlled by VB interface.