并利用程序间联锁性的特点，用PLC编程有效的预防这类故障的发生。
The program of PLC has a characteristic of interlock, and then it can prevent this fault from doing effectively.
本课题来自唐公塔泵站的液位联锁系统，该系统实现高位水池与二级泵站、低位水池与一级泵站间的液位控制连锁，以保证水池液位始终保持在规定的安全限度内。
The task comes from a real problem of water level controlled at Tang Gong Ta pump station, which is a water level controlling system for safe range between pool and electric moter.
首先根据进路间不同的敌对关系，得到进路联锁表的生成判据。
Firstly, the generation criterion of admission passage interlocking table can be created according to the different antagonism of admission passages.
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