我國(guó)的PLC產(chǎn)品的研制和生產(chǎn)經(jīng)歷了三個(gè)階段:順序控制器(1973~1979)——一位處理器為主的工業(yè)控制器(1979~1985)——8位微處理器為主的可編程序控制器(1985以后)。在對(duì)外開(kāi)放政策的推動(dòng)下,國(guó)外PLC產(chǎn)品大量進(jìn)入我國(guó)市場(chǎng),一部分隨成套設(shè)備進(jìn)口。如寶鋼一、二期工程就引進(jìn)了500多套,還有咸陽(yáng)顯象管廠、秦皇島煤碼頭、汽車廠等?,F(xiàn)在,PLC在國(guó)內(nèi)的各行各業(yè)也有了極大的應(yīng)用,技術(shù)含量也越來(lái)越高。
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