1D54458G02
1D54458G02
1D54458G02
可編程控制器PLC運(yùn)行時可能會出現(xiàn)死機(jī)的情況,這給工業(yè)生產(chǎn)造成不可預(yù)估的損失,因此,首先要了解PLC死機(jī)的原因,針對原因進(jìn)行排查,軟件或硬件錯誤都有可能導(dǎo)致PLC死機(jī),下面分別進(jìn)行介紹:
1、硬件方面
(1)I/O竄電,PLC自動偵測到I/O錯誤,進(jìn)入STOP模式。
(2)I/O損壞,程序運(yùn)行到需要該I/O的反饋信號,不能向下執(zhí)行指令。
(3)擴(kuò)展模塊(功能型,如A/D)線路干擾或開路等。
(4)電源部分有干擾或故障。
(5)PLC的連接模塊及地址分配模塊出故障。
(6)電纜引起的故障。
2、軟件方面
(1)觸發(fā)了死循環(huán)。
(2)程序改寫了系統(tǒng)參數(shù)區(qū)的內(nèi)容,卻沒有初始化部分。
(3)保護(hù)程序啟動:硬件保護(hù)、限制使用時間(針對貨款收回)
(4)數(shù)據(jù)溢出,步長過大、看門狗 (可修改DOG時間)動作。
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