PU516A 3BSE032402R1 ABB

There are many PLC self-test signals and many internal devices,and most users do not give full play to their functions.

In fact,it can be used to monitor the PLC’s own work,or to monitor the control object.

For a complex control system,especially an automatic control system,it is very necessary to monitor and even further self-diagnosis.It can reduce the faults of the system,it is easy to find the faults,it can improve the cumulative average trouble-free running time,reduce the fault repair time,and improve the reliability of the system.

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。

其实，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。

对一个复杂的控制系统，特别是自动控制系统，监控以至进一步能自诊断是非常必要的。它可减少系统的故障，出了故障也好查找，可提高累计平均无故障运行时间，降低故障修复时间，提高系统的可靠性。