利用VB实现上位机对变频器的远程监控

Long -distance Monitor and Control of Frequency Converter by Using VB

本文介绍了如何利用VB的通讯控件MSComm,根据USS通讯协议,实现上位机对西门子变频器的远程控制。文中详细说明了VB控件MSComm的使用方法以及西门子变频器的USS通信协议,同时给出了程序设计流程图和部分程序清单。

This paper presents how to use VB's communication control to realize long -distance monitor and con-trol of frequency converter,according to USS protocol.The use of MSComm and the USS protocol are in-troduced in detail,as well as providing flow chart of prog ram and a part of prog ram codes.