A20B-2000-0670

A20B-2000-0670

這個(gè)檢修思路就是聲光報(bào)警故障出現(xiàn)。

(1)先看是否是軟故障引起，各各相關(guān)聯(lián)的參數(shù)設(shè)置是否合理，實(shí)際值超沒超出設(shè)定范圍；

(2)PLC外圍電氣元件有沒有損壞；

(3)PLC本身元件有無損壞或者編程有紊亂

總結(jié)一下，PLC區(qū)分外圍與本身故障。我們看PLC各各端子的指示燈(一般情況指示燈損壞率非常低)是否閃滅，指示燈亮一般是外圍有故障。PLC外圍元件的檢查與我們原先檢查方式大致相同，只是多了傳感器的檢查項(xiàng)目。與PLC相匹配的觸摸屏我們只要檢查數(shù)據(jù)設(shè)置是否合理。PLC自身檢查在滿足輸出條件或者有輸入信號(hào)時(shí)PLC端子通斷是否正常。

綜上，PLC控制線路故障大多數(shù)出現(xiàn)在外圍。以上幾點(diǎn)是過來人的維修經(jīng)驗(yàn)，有不足之處請批評指教，共同進(jìn)步。

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