Design of Dual-system Negotiation Redundant Hot Standby Industrial Control Platform
In order to solve the problems of complex design and high cost caused by the central arbitration mechanism commonly used in multimode redundancy control system,a design scheme of dual-system hot backup redundancy control platform without central arbitration was proposed.The scheme did not include arbitration equipment,and the control platform was mainly composed of two sets of identical main control modules connected by two pairs of mutually redundant high-speed fiber channel,in which the main control module used embedded processor and field programmable gate array to work together,and all software and hardware were domestically selected.The running state of the main control module was managed by the finite state machine,the two mod-ules used optical fiber communication to achieve information exchange and key data synchronization,and combined with negotia-tion monitoring instead of arbitration mechanism to achieve hot backup redundancy.The control platform was designed with hard-ware and software layered architecture.The hardware layer was composed of processing system hardware and programmable logic hardware,and the software layer was composed of embedded real-time operating system and driver program.The application layer design based on the open control platform can ensure the flexibility of the user's business logic to the greatest extent.
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