描述
可編程控制器PLC是一種數(shù)字運(yùn)算操作的電子系統(tǒng),專為在工業(yè)環(huán)境應(yīng)用而設(shè)計(jì);它采用一類可編程的存儲(chǔ)器,用于其內(nèi)部存儲(chǔ)程序,執(zhí)行邏緝運(yùn)算、順序控制、定時(shí)、計(jì)數(shù)與算術(shù)運(yùn)算等操作指令,并通過數(shù)字、模擬式的輸入、輸出,控制各種類型的機(jī)械或生產(chǎn)過程;可編程控制器及其有關(guān)外圍設(shè)備的設(shè)計(jì),都要按照“易于與工業(yè)控制系統(tǒng)聯(lián)成一個(gè)整體、易于擴(kuò)充功能的原則”進(jìn)行。由該定義可知:PLC是一種由“事先存貯的程序”來確定控制功能的工控類計(jì)算機(jī)。
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