实时以太网技术及其在PLC产品中的应用综述  

Real-time Ethernet Technology and Its Application Review in PLC Products

作　　者：张红芳[1] 黄海[1] 孙延岭[1] 

机构地区：[1]国网电力科学研究院

出　　处：《可编程控制器与工厂自动化（PLC FA）》2011年第5期33-36,共4页Programmable controller & Factory Automation(PLC & FA)

摘　　要：本文首先分析了传统现场总线的特点,简单介绍了现场总线标准IEC61158的第四版采用的20种现场总线、工业以太网、实时以太网,指出实时以太网技术已经成为现场总线发展的必然趋势。本文分析了实时以太网的关键技术,就EPA、EtherCAT等几种实时以太网技术的技术特点进行了比较,最后指出传统现场总线将逐渐被实时以太网替代用于PLC产品,尤其在中高档PLC产品中。In this paper an analysis is conducted on the characteristics of the traditional field bus.The paper introduces 20 kinds of fieldbus,industrial Ethernet and real-time Ethernet in the fourth edition of fieldbus standard IEC61158.The real-time Ethernet has become an inevitable trend of fieldbus.The key technology of real-time Ethernet and technical features of EPA and EtherCAT are provided.Traditional fieldbus will be gradually replaced by real-time Ethernet for PLC,especially in the high-end PLC products.

关 键 词：现场总线 实时以太网 PLC 应用 

分 类 号：TP393[自动化与计算机技术—计算机应用技术]