104X905BA603 104X905BA603 104X905BA603
PLC問(wèn)世以來(lái),盡管時(shí)間不長(cháng),但發(fā)展迅速。為了使其生產(chǎn)和發(fā)展標準化,***際電工委員會(huì )(IEC) 后頒布了PLC標準的草案 稿, 二稿,并在1987年2月通過(guò)了對它的定義:
“可編程控制器是 種數字運算操作的電子系統,專(zhuān)為在工業(yè)環(huán)境應用而設計的。它采用 類(lèi)可編程的存儲器,用于其內部存儲程序,執行邏輯運算、順序控制、定時(shí)、計數與算術(shù)操作等面向用戶(hù)的指令,并通過(guò)數字或模擬式輸入/輸出控制各種類(lèi)型的機械或生產(chǎn)過(guò)程??删幊炭刂破骷捌溆嘘P(guān)外部設備,都按易于與工業(yè)控制系統聯(lián)成 個(gè)整體,易于擴充其功能的原則設計。”
為了避免與個(gè)人計算機PC(Personal Computer)相混淆,所以改為PLC(Programmable Logic Controller)即可編程邏輯控制器,但從功能上講,現在的PLC早已不是原來(lái)意義上的“PLC”了。
總之,可編程控制器是 臺計算機,它是專(zhuān)為工業(yè)環(huán)境應用而設計制造的計算機。它具有豐富的輸入、輸出接口,并且具有較強的驅動(dòng)能力。但可編程控制器產(chǎn)品并不針對某 具體工業(yè)應用,在實(shí)際應用時(shí),其硬件需根據實(shí)際需要進(jìn)行選用配置,其軟件需根據控制要求進(jìn)行設計編制。
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廈門(mén)莫格電氣自動(dòng)化
★ 公司名:廈門(mén)興銳嘉進(jìn)出口
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主營(yíng):FOXBORO,AB、ABB、Scheneider、Siemens、FANUC,安川,GE
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