故障處理某些故障或狀態(tài)對(duì)系統(tǒng)的操作和執(zhí)行產(chǎn)生影響時(shí).說(shuō)明在90-30 PLC系列、90-20 PLC系列和Micro PLC中存在故障。這些情況可能影響PLC控制機(jī)器或過(guò)程的能力。其它情況可能只作為一種警告，如:低的電池信號(hào)保護(hù)存儲(chǔ)器的電池電壓偏低,應(yīng)更換,此情況或錯(cuò)誤稱(chēng)為故障。

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