1783-US06T01F
1783-US06T01F
這里介紹一種用PLC定時器作看門狗，對控制對象工作情況進行監控的思路。
如用PLC控制某運動部件動作，看施加控制后動作進行了沒有，可用看門狗辦法實現監控。具體作法是在施加控制的同時，令看門狗定時器計時。如在規定的時間內動作完成，即定時器未超過警戒值的情況下，已收到動作完成信號，則說明控制對象工作正常，無需報警。
若超時，說明不正常，可作相應處理。
如果控制對象的各重要控制環節，都用這樣一些看門狗"看"著，那系統的工作將了如指掌，出現了問題，卡在什么環節上也很好查找。
現貨，現貨，降降降，火火火，火火火……
現貨，現貨，降降降，火火火，火火火……
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