求翻译：PLC自检信号很多，内部器件也很多，多数使用者未充分发挥其作用。 实在，完全可利用它进行PLC自身工作的监控，或对控制对象进行监控。 这里介绍一种用PLC定时器作看门狗，对控制对象工作情况进行监控的思路。 如用PLC控制某运动部件动作，看施加控制后动作进行了没有，可用看门狗办法实现监控。具体作法是在施加控制的同时，令看门狗定时器计时。如在规定的时间内动作完成，即定时器未超过警戒值的情况下，已收到动作完成信号，则说明控制对象工作正常，无需报警。是什么意思？

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Self-test signal PLC many, many internal device, and most users are not fully play its role. It is, to use it for their own work PLC monitoring, or Control objects to monitor. Here is a timer for PLC watchdog, and work to control objects in the line of thought control. If you use a moving part PLC c

The PLC self-checking signal are very many, the internal component very are also many, the most users fully have not played%2

PLC self test signal a lot, has a lot of internal devices, most users did not bring into full play its role. Indeed, fully use it for monitoring of PLC's own work, or to monitor the control object. Here is a kind of PLC timers for watchdog, monitoring of controlled object. PLC control of a moving pa