设备环  

Device Level Ring

作　　者：华镕 

机构地区：[1]罗克韦尔自动化(中国)有限公司,北京市100005

出　　处：《仪器仪表标准化与计量》2011年第6期35-38,共4页Instrument Standardization & Metrology

摘　　要：工业控制中存在一类应用,使用基于集成2个交换口的终端节点,构成的环形/线形网络,它比传统的星形网络更适于现场布局。另外,系统要求终端节点、网络接口或者电缆出现单点故障时也能继续运行。设备环(DLR)是一种故障容错网络,可以满足这种要求。A class of applications in the industrial control market which a ring/linear network based on end nodes with integrated 2-port switches is more suitable than a conventional star network. Additionally, continuous system operation is required even when a single fault occurs in the end node, its network interface or cable system. Device Level Ring （DLR） is a fault tolerant network allowing realization of control systems with such requirements. This paper provides an introduction to DLR network. It describes principle of operation of this network, its features, and performance. It also describes DLR protocol and presents recommendations for implementing the DLR interface.

关 键 词：高可用性网络 设备环 环监督器 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]