带信道冗余的现场通信系统设计  

Design of Field Communication System with Channel Redundancy

作　　者：罗超[1] 薛福珍[1] 庞国仲[1] 

机构地区：[1]中国科学技术大学自动化系,合肥230027

出　　处：《仪器仪表学报》2004年第2期266-267,280,共3页Chinese Journal of Scientific Instrument

摘　　要：介绍了一种用于互连 DCS中各个 DOS和 Windows NT主机、并且独立于具体 DCS的现场通信系统。它采用了信道冗余模型 ,支持信道的自动和手动切换。通过一个面向数据块的传输层 ,它能够区分需要短时延的实时数据报文和需要高可靠性的命令 /应答报文并采用不同的策略进行传输。It introduces a field communication system that is used to interconnect all DOS and Windows NT hosts in a DCS and at the same time independent of the given DCS.It adopts a channel redundancy module and thus supports automatic and manual channel switching.By using a data block oriented transport layer it can differentiate between real-time packets that need short delay and command/response packets that need high reliability and uses different policies to transmit them.

关 键 词：现场通信系统 信道冗余 实时通信 DCS 设计 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置] TN914[自动化与计算机技术—控制科学与工程]