摘要
西门子公司的SIMATIC S7-200系列是广泛适用于中小型设备控制的工业可编程控制器,其良好的通讯能力使其在工业控制中得到越来越广泛的应用。在现代工业控制领域中,PLC作为下位机完成现场各种信号和数据的采集、运算和控制,上位机则可提供人机交互界面,实现数据的处理以及现场数据的实时显示等监视和远程控制等功能。介绍了利用VB实现S7-200 PLC与上位机之间串行通讯的原理及方法。
The PLC of SIEMENS SIMATIC S7--200 series is widely suit for small and middle controlling systems. The excellent communication ability makes itself to be used wider and wider. In the fields of modern industrial controlling, PLC is used to collect, calculate and control every kind of signals and data, while the host computer can provide mutual interface,realizing the functions of managing data and long-distance controlling. This paper introduces the theory and way on the serial communication between S7-- 200 PLC and host computer based on VB.
出处
《机械工程与自动化》
2007年第2期79-80,85,共3页
Mechanical Engineering & Automation
