基于CPLD的Profibus-DP冗余双网切换逻辑的设计

Design of Profibus-DP Dual Redundant Network Switch Based on CPLD

中文关键词:  工业控制系统  Profibus-DP  冗余双网通信  CPLD  冗余双网切换

英文关键词:industrial control system  Profibus-DP  dual redundant communication  CPLD  dual redundant network switch

中文摘要:

      Profibus-DP总线在工业现场控制系统中应用非常广泛，为了提高系统的可靠性，工业控制系统多采用冗余双网Profibus-DP总线通信，当一条Profibus-DP总线出问题时，Profibus-DP系统可以利用冗余双网切换逻辑切换到另一条Profibus-DP总线运行，该切换逻辑基于CPLD，实现了Profibus-DP冗余双网通信的硬件切换机制。

英文摘要:

      The application of Profibus-DP bus is very popular in industrial control systems.In order to improve system reliability,industrial control systems often adopt dual redundant Profibus-DP communications.When one Profibus-DP bus fails,the Profibus-DP system can switch to the other Profibus-DP bus through dual redundant network switch logic.This switch logic implements hard switch of Profibus-DP dual redundant communications based on CPLD.