集散控制系统中通讯子网的实时性问题研究

Research of The Realtime Problem on Communication Subnet of DCS

在现代工业控制系统 ,尤其是DCS集散控制系统中 ,通信子网的实时性起着至关重要的作用。讨论了在各种拓朴结构及复合拓朴结构下 ,几种常用存取控制方法及通讯协议的实时性问题。并以各著名品牌的DCS为例比较了其处理实时性问题的不同方法。对于研制集散控制系统及基于网络的控制系统提供了有效的选择方案。

In the modern control system,especially in the Distribute Control System,.the realtime problem of communicative subnet play a very important role.This paper discuss the realtime problem of some usual access control method and communication protocol in all kinds of topologic and complex topologic construction .We use some kinds of famous DCS to compare their different method solving the realtime problem.It is useful for us to research and produce DCS and other control system on network.