摘要
该文介绍了利用VisualBasic6．0的MSComm控件完成对计算机串口的控制、系统通过ModBus协议及RS232／485转换电路实现对变频器的参数传递、运行控制等。
This Paper Introduces a way by which The host Computer controls variable frequency driver by The Mircosoft Communication Control based by Visual Basic 6.0, The serial Communication Program is designed to control the variable frequency driver by using the ModBus protocol and RS232/485 change-over circuito So it can be realized that transfer parameters and control running.
作者
张交柏
ZHANG Jiao-bai （Hunan Normal University Subsidiary, Xiangdong Hospital Information Center, Liling 412200, China）
出处
《电脑知识与技术》
2010年第02X期1485-1486,1489,共3页
Computer Knowledge and Technology
