基于FX_(2N)系列PLC的高速公路照明用集散控制系统通信网扩展研究  

Investigation on Communication Network of DCS for Highway Lighting Monitoring System Based on FX_(2N) PLC

作　　者：曹广忠[1] 徐刚[1] 

机构地区：[1]深圳大学工程技术学院,518060

出　　处：《电工技术杂志》2002年第11期20-23,共4页Electrotechnical Journal

基　　金：广东省自然科学基金资助项目 (0 0 0 845 ) ;广东省教育厅"千百十"工程人才基金资助项目

摘　　要：提出了由Internet、Ethernet、RS— 4 85光纤网三层网络构建高速公路照明用智能集散监控系统的网络通信方案。下位机采用基于RS— 4 85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PLCRS— 4 85网络通信系统 ,使该PLC网络通信系统可同时接入多达 2 5 6台的PLC。Based on the model of three layers INTERNERT ETHERNET RS-485 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 FX 2N PLCs made by MITSUBISH ELECTRONIC When this kind of PLC as the substation and RS-485 communication protocol are utilized,the disadvantage of the corresponding RS-485 network is that the only 16 PLCs can be linked together to work based on RS-485 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 RS-485 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：FX2N系列PLC 高速公路照明 集散控制系统 通信网 扩展 光纤通信网 可编程控制器 

分 类 号：TP273.5[自动化与计算机技术—检测技术与自动化装置]