上位机与PLC通信的设计及应用  

The Design and Application of Communication between Host Computer and PLC

作　　者：丁莉君[1] 李宏燕[1] 

机构地区：[1]宁夏大学机械工程学院,宁夏银川750021

出　　处：《机床与液压》2009年第9期231-232,175,共3页Machine Tool & Hydraulics

基　　金：宁夏大学科学研究基金资助项目(ZR200705)

摘　　要：以监控计算机与可编程控制器(PLC)数据通信方式为理论基础,对专用行车装置提出了实时监控的方法,给出了在Visual Basic 6.0环境下实现上位机与西门子S7-200系列PLC通信的思路,通过对相关理论和技术的分析、应用,设计出监控界面,开发了通信程序。阐述了S7-200系列PLC自由口通信模式的设计过程,并将其应用于生产实际。实践表明,这种通信方式具有一定的工程应用价值和参考价值。Based on communication between monitoring computer and PLC, the real time monitoring mode about line vehicle ap- paratus was proposed and the communication between host computer and SIEMENS＇ S7-200 PLC under VB6.0 was realized. The moni- toring interface was designed and the communication program was compiled by analyzing and using some theories and technique. The design process of S7-200 PLC＇s free port communication model was discussed, and the approach was used in production.

关 键 词：可编程控制器 上位机 通信 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]