高速公路照明用集散控制系统通信网研究  

Investigation on a New Communication Network of DCS for Highway Lighting Monitoring System

作　　者：曹广忠[1] 徐刚[1] 

机构地区：[1]深圳大学工程技术学院,深圳518060

出　　处：《仪器仪表学报》2002年第5期504-507,511,共5页Chinese Journal of Scientific Instrument

基　　金：广东省自然科学基金(No000845);深圳市科学技术局基金(No9901)资助项目。

摘　　要：开发了一套功能较完善的高速公路照明用智能集散监控系统,提出了由Internet-Ethernet-RS485光纤网三层网络构建系统的网络通信方案。针对下位机采用基于RS485通信协议的可编程控制器（PLC）,分析了联网拓展的可行性,构建了新拓展的 PLC RS485网络通信系统,使PLC网络通信系统可同时接入多达256台的PLC。试验运行结果表明:系统性能稳定,实现了高速公路照明系统的远距离集中智能监控。Based on the model of three layers Internet-Ethernet- RS485 network,a DCS system developed for monitoring and control of highway lighting monitoring system(HLMS) is presented,which is composed of proxy server, SQL server .industrial computers ,and FX2N PLCs made by MITSUBISH ELECTRONIC. When this kind of PLC as the substation and RS485 communication protocol are utilized, the disadvantage of the corresponding RS485 network is that the only 16 PLCs can be linked together to work based on RS485 communication protocol. In order to extend the number of PLCs,an optical fiber communication network is introduced and investigated. As a result,256 PLCs can operate together instead of 16 PLCs based on RS485 communication protocol. Applied and tested in the HLMS,the new communication network shows high performance such as high reliability with lower price.

关 键 词：集散控制系统 高速公路 照明 RS485通信 光纤通信网 可编程控制器 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置] TN915[自动化与计算机技术—控制科学与工程]