3.5用于信號(hào)監(jiān)控
PLC自檢信號(hào)很多，內(nèi)部器件也很多，多數(shù)使用者未充分發(fā)揮其作用。
其實(shí)，完全可利用它進(jìn)行PLC自身工作的監(jiān)控，或?qū)刂茖?duì)象進(jìn)行監(jiān)控。
這里介紹一種用PLC定時(shí)器作看門(mén)狗，對(duì)控制對(duì)象工作情況進(jìn)行監(jiān)控的思路。
如用PLC控制某運(yùn)動(dòng)部件動(dòng)作，看施加控制后動(dòng)作進(jìn)行了沒(méi)有，可用看門(mén)狗辦法實(shí)現(xiàn)監(jiān)控。具體作法是在施加控制的同時(shí)，令看門(mén)狗定時(shí)器計(jì)時(shí)。如在規(guī)定的時(shí)間內(nèi)動(dòng)作完成，即定時(shí)器未超過(guò)警戒值的情況下，已收到動(dòng)作完成信號(hào)，則說(shuō)明控制對(duì)象工作正常，無(wú)需報(bào)警。
備貨，備貨，降降降，火火火，火火火……
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公司名稱(chēng)：廈門(mén)泰尼電氣有限公司
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