在工業(yè)生產過程中，1969年面世的plc和1975年面世的DCS可能是兩類影響最為深遠的計算機操控系統(tǒng)。PLC 的面世替代了繼電器之類的器材，完成了開關量的連鎖操控、程序操控；DCS的面世替代了顯現(xiàn)儀、調節(jié)器之類的外表，完成了模擬量的指示、記載和PID回路調節(jié)等功能。20世紀80年代晚期，跟著計算機技能、通訊技能、集成電路技能、智能傳感器技能的開展而呈現(xiàn)的現(xiàn)場總線操控系統(tǒng)（Fieldbus Control System , FCS ）改變了原有操控系統(tǒng)的構造，使操控系統(tǒng)由關閉向敞開走出了主要的一步。20世紀90年代中期，以PC為根底的操控系統(tǒng)（PC-Based Control System，PCBCS）開始呈現(xiàn)，不少專家以為它將是工業(yè)自動化范疇最具開展?jié)摿Φ男录寄?，他們將PCBCS 與PLC 、DCS、 (或許再加上FCS)并稱為工業(yè)生產過程三大（或四大）操控系統(tǒng)。甚至有人在四年以前的文章中就談到"多數(shù)人以為在往后十年內PC操控將逐漸替代傳統(tǒng)的PLC或DCS"。而德國菲尼克斯（PHOENIX CONTACT）公司的專家介紹：簡直一切的咨詢機構都以為到2005年，PC為根底的操控系統(tǒng)將占商場分額的50%以上。
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