6GF6223-6MA
6GF6223-6MA
可編程控制器的定義
可編程控制器，簡(jiǎn)稱PLC（Programmable logic Controller）,是指以計(jì)算機(jī)技術(shù)為基礎(chǔ)的新型工業(yè)控制裝置。在1987年***際電工委員會(huì)（International Electrical Committee）頒布的PLC標(biāo)準(zhǔn)草案中對(duì)PLC做了如下定義：“PLC是 種專門為在工業(yè)環(huán)境下應(yīng)用而設(shè)計(jì)的數(shù)字運(yùn)算操作的電子裝置。
它采用可以編制程序的存儲(chǔ)器，用來(lái)在其內(nèi)部存儲(chǔ)執(zhí)行邏輯運(yùn)算、順序運(yùn)算、計(jì)時(shí)、計(jì)數(shù)和算術(shù)運(yùn)算等操作的指令，并能通過(guò)數(shù)字式或模擬式的輸入和輸出，控制各種類型的機(jī)械或生產(chǎn)過(guò)程。PLC及其有關(guān)的外圍設(shè)備都應(yīng)該按易于與工業(yè)控制系統(tǒng)形成 個(gè)整體，易于擴(kuò)展其功能的原則而設(shè)計(jì)。”
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