太浦闸监控系统现场总线通信网络可靠性研究  

Reliable research in fieldbus communication network of Taipu sluice

作　　者：邹爱平[1] 迮振荣[1] 晋成凤[2] 吕国芳[2] 

机构地区：[1]太湖流域管理局苏州管理局,江苏苏州215011 [2]河海大学能源与电气学院,江苏南京211100

出　　处：《电子设计工程》2010年第9期93-95,共3页Electronic Design Engineering

摘　　要：针对太浦闸监控系统现场控制单元现场总线通信网络存在的问题,根据现场勘测分析,得出可能导致此问题的原因有:网络拓扑结构不合理、总线特性阻抗的连续性不好、系统保护措施不够,提出了采用RS485集线器来实现星型接法,使网络拓扑结构合理,并通过其光电隔离的防雷的功能,加强系统的保护,同时在总线的终端串接电阻来改善总线特性阻抗的连续性,对原有现场总线通信网络进行改造。改造后系统运行稳定可靠,效果良好。For the fieldbus communication network problems appearing in the on-site control unit of Taipu gate dam hub monitoring system, according to the field exploration and analysis, several possible reasons can be concluded： the unreason- able network topology; the unqualified continuity of bus impedance; the insufficient protection system. The paper puts for- ward the following proposals to transform the original fieldbus communication network： adopting RS485 hub to realize star connection method, making network topology reasonable; strengthening the system protection by photoelectric isolation＇ lightning protection function; installing resistances in series on bus termination to improve bus impedance continuity. After transformation, the system operation is stable and reliable with good effect.

关 键 词：RS485 现场总线 集线器 RELIABILITY 

分 类 号：TN202[电子电信—物理电子学]