描述
用PLC實(shí)現(xiàn)對(duì)系統(tǒng)的控制是非?？煽康摹＿@是因?yàn)镻LC在硬件與軟件兩個(gè)方面都采取了很多措施，確保它能可靠工作。事實(shí)上，如果PLC工作不可靠，就無法在工業(yè)環(huán)境下運(yùn)用，也就不成其為PLC了。
?PLC的輸入輸出電路與內(nèi)部CPU是電隔離。其信息靠光耦器件或電磁器件傳遞。而且，CPU板還有抗電磁干擾的屏蔽措施。故可確保PLC程序的運(yùn)行不受外界的電與磁干擾，能正常地工作。
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