摘要
列举了数种著名ＰＬＣ网络，它们大多是三级或四级总线型子网复合而成，具有良好的可扩展性及通信适应性。高层子网通用化与标准化的趋势使ＰＬＣ网络比较容易接入ＣＩＭＳ系统或大型集散系统。分析了ＰＬＣ网络其它各层采用专利协议的通信原理，存在问题及对策。
In this paper,several kinds of PLC network are introduced.Many of them are compounded with 3 or 4 level fieldbus sub networks.The trands of universality and large scale DCS.The communication principle,problem and counter plot of other level network of PLC which adopt themselves patent agreement are analyzed.
出处
《化工自动化及仪表》
CAS
1997年第6期3-8,共6页
Control and Instruments in Chemical Industry
基金
福建省自然科学基金
