微机联锁PLC系统热备改冷备的探索与实施

Exploration and Practice to Change Microcomputer Interlocking PLC from Hot- Backup to Cold-Back

针对现行铁路信号微机联锁系统中PLC双机热备中存在的局限性，创造性的对PLC的远程I／O进行拓展，将双机热备改进为双机热备与冷备兼顾，提高系统运行效率，大大缩短故障处理时间。

Aiming at shortcomings of hot-backup PLC in railway signal microcomputer interlocking system, my department expanded the remote I/O and changed the hot-backup PLC to a cold-backup PLC so that my department enhanced running efficiency of the system and shortened fault-processing time.