基于Profinet的异地冗余技术——高速公路隧道监控系统中的应用

Distributed Redunduncy Control System based on Profinet——Application of Tunnel Control System in Highway

随着自动化技术的发展,冗余PLC技术和Profi net技术已经广泛应用并成为隧道监控系统的主流标准。异地冗余系统不同于以往的冗余系统,其特点表现在互为热备的两套主控PLC在不同地点,即使一个PLC发生严重事故损坏,整体PLC系统依然可以稳定运行。Profi net技术通过数据优先级控制保证控制网络的实时性,基于Profinet的异地冗余技术是Profinet技术和异地冗余技术的结合,这种技术在隧道监控系统中的实际应用是一个创新,大大的提高了系统的稳定性能和数据传输的实时性。

With booming development of the automation-tech, the redundancy technology and Profinet technology for PLC control system are widely applied and becoming the main standard of tunnel control system. Distributed redunduncy control system is different from the commonredunduncy control system, it features that the two main PLC stand by for each other can be distributed in different locations, even if one location's PLC cabinet is breakdown in accident, the PLC control system is still running without influence. Profinet technology has the priority control ability for the all the data transferring in the control net, the distributed redunduncy control system based on Profinet is the combination of redunduncy and Profinet, it is an innovation for the application of tunnel control system and make a big promotion of the system stability and real-time.