一個1/0故障屏顯示該信息的示例如下。故障組PLC CPU軟件故障中的故障是由系列90-30/90-20或Micro PLC CPU的操作軟件產(chǎn)生的。它們將在系統(tǒng)運行的許多不同點上出現(xiàn)。每當一個致命性故障出現(xiàn),PLC CPU便立即轉(zhuǎn)人特定的故障掃描(ERRORSWEEP)狀態(tài)。當PLC處于這種狀態(tài),其被允許的唯一操作是與編程器的通訊聯(lián)絡。清除這種故障的唯-途徑是給PLC循環(huán)通電。該組教障作用是致命性的。

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