基于ControlNet网络的热备系统设计.doc

基于ControlNet网络的热备系统设计 摘 要 随着现代工业的迅速发展，生产中对系统连续工作的要求也就越来越高，无论是生产型企业如：石油、化工、钢铁等，还是服务型企业如：港口、地铁，机场等。系统永远可靠是它们的目标，所以热备技术被广泛应用并得到极大的发展。 本文以ControlLogix控制系统为基础，研究了Logix5555可编程处理器的网络特性和冗余特性，设计了基于ControlNet网络的热备系统。在完成PC工作站、冗余处理器（ControlLogix处理器）、通信模块1203-CN1、变频器PowerFlex70、被控对象风动模型的安装和组态之后，架设了基于ControlNet的两个Logix5555处理器之间的单机架和双机架热备控制系统。分别针对了处理器处于编程模式、错误模式、通讯失败、机架掉电等故障模式进行了梯形图程序的编写。同时用生产者/消费者技术实现处理器之间的准确对时，进而实现了精确计算切换时间，并通过网络优化实现了降低切换时间。最后，本文对所设计的系统进行了总结，并对今后的基于网络控制的可编程处理器冗余系统设计提出了有建设性的建议。 关键词： 热备 可靠性 可编程处理器 切换时间  The design of Hot Backup system based on ControlNet Author Liu Jun Tutor Wang Jinkuan, Zhao Qiang abstract With the rapid development of modern industry, the requisition for systems are higher and higher in Production. No matter what is production enterprise, such as petroleum, chemistry industry, steel; or service enterprise, like subway, port, airdrome. The objects of all them are the systems running well for ever, so Hot Backup technology is widely used in all kinds of systems and developed greatly. In this article, based on the ControlNet Network of Rockwell, the Network and redundancy characteristic of logix5555 programmable controller are researched. After finishing the installation and configuration of the PC station, Redundancy controller (ControlLogix controller), communication module 1203-CN1, PowerFlex70 drive and object model, a single chassis and a dual chassis Hot Backup control system based on ControlNet are set up, which contains two Logix5555 controllers. Application software RSLogix5000 is used for I/O configuration of Controller in Redundancy System and complying Rung logical procedure for faulted mode, communication failed, Programmable mode, power off. At the same time, two controllers are made to keep the same time with P/C and compute, switch time precisely with program, and reduce switch time by optimizing networks. Finally, a summarization is made for a Hot Backu