描述

1C31194G03

在中國(guó)，大約從1974、75年在北京和上海開(kāi)始開(kāi)發(fā)采用位片式微處理芯片的可編程順序控制器，并有所應(yīng)用。但一直未能形成批量生產(chǎn)。在改革開(kāi)放剛起步的1979年，在當(dāng)時(shí)的機(jī)械部?jī)x表局的推動(dòng)下，開(kāi)始從美國(guó)MODICON引進(jìn)起584的PLC，并首先在電站的輔機(jī)如輸煤、除灰除渣、水處理系統(tǒng)以及水泥廠等控制系統(tǒng)中成功應(yīng)用，從而大大推動(dòng)了PLC在我國(guó)工業(yè)的大規(guī)模運(yùn)用。遺憾的是，花了很大一筆外匯的這個(gè)項(xiàng)目并不曾形成良性的有后續(xù)的發(fā)展。

自1985年開(kāi)始，小型PLC首先是日本三菱電機(jī)公司的MELSEC-F，通過(guò)非政府渠道進(jìn)入中國(guó)市場(chǎng)。不到三、四年時(shí)間，小型PLC就形成了大面積的推廣應(yīng)用局面。1990年以后，Siemens、Allen Bradley以及其它知名品牌開(kāi)始大舉進(jìn)入中國(guó)市場(chǎng)，占據(jù)中、大型的PLC的較大份額。1995年后形成了大型PLC以歐美為主、中型PLC歐美和日本平分秋色、小型PLC則以日本為主、Siemens也步步緊逼的格局。至今沒(méi)有很大改變。1992年以后，可編程序控制器國(guó)際標(biāo)準(zhǔn)IEC 61131的各個(gè)部分陸續(xù)公布施行。中國(guó)的工業(yè)過(guò)程測(cè)量和控制標(biāo)準(zhǔn)化委員會(huì)按與IEC國(guó)際標(biāo)準(zhǔn)等效的原則，組織翻譯出版工作。于1995年12月29日以GB/T 15969.1,15969.2,15969.3,15969.4 頒布了PLC的國(guó)家標(biāo)準(zhǔn)。該標(biāo)準(zhǔn)只涉及IEC 61131的第一、第二、第三和第四部分，沒(méi)有納入1995年以后出版的第五部分通信、第七部分模糊控制編程軟件工具、第八部分IEC 61131-3語(yǔ)言的實(shí)現(xiàn)導(dǎo)則。

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