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140CRP93200R

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品 牌: 施耐德 
型 號(hào): 140CRP93200R 
規(guī) 格: 140CRP93200R 
單 價(jià): 999.00元/個(gè) 
起 訂: 1 個(gè) 
供貨總量: 999 個(gè)
發(fā)貨期限: 自買家付款之日起 3 天內(nèi)發(fā)貨
所在地: 福建 廈門市
有效期至: 長(zhǎng)期有效
更新日期: 2015-01-23 11:05
瀏覽次數(shù): 1
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公司基本資料信息
 
 
 
【140CRP93200R】詳細(xì)說(shuō)明
?140CRP93200R
140CRP93200R
140CRP93200R
可編程序控制器PLC的發(fā)展概況及發(fā)展方向
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一、國(guó)外PLC發(fā)展概況

PLC自問(wèn)世以來(lái),經(jīng)過(guò)40多年的發(fā)展,在美、德、日等工業(yè)發(fā)達(dá)國(guó)家已成為重要的產(chǎn)業(yè)之一。世界總銷售額不斷上升、生產(chǎn)廠家不斷涌現(xiàn)、品種不斷翻新。產(chǎn)量產(chǎn)值大幅度上升而價(jià)格則不斷下降。

目前,世界上有200多個(gè)廠家生產(chǎn)PLC,較有名的:美國(guó):AB通用電氣、莫迪康公司;日本:三菱、富士、歐姆龍、松下電工等;德國(guó):西門子公司;法國(guó):TE?施耐德公司;韓國(guó):三星、LG公司等。

、技術(shù)發(fā)展動(dòng)向

1.?產(chǎn)品規(guī)模向大、小兩個(gè)方向發(fā)展

大:? I/O點(diǎn)數(shù)達(dá)14336點(diǎn)、32位為微處理器、多CPU并行工作、大容量存儲(chǔ)器、掃描

??????速度高速化。

?。?span lang="EN-US">??由整體結(jié)構(gòu)向小型模塊化結(jié)構(gòu)發(fā)展,增加了配置的靈活性,降低了成本。

2. PLC在閉環(huán)過(guò)程控制中應(yīng)用日益廣泛

3.?不斷加強(qiáng)通訊功能

4.?新器件和模塊不斷推出

高檔的PLC除了主要采用CPU以提高處理速度外,還有帶處理器的EPROMRAM的智能I/O模塊、高速計(jì)數(shù)模塊、遠(yuǎn)程I/O模塊等專用化模塊。

5.?編程工具豐富多樣,功能不斷提高,編程語(yǔ)言趨向標(biāo)準(zhǔn)化

有各種簡(jiǎn)單或復(fù)雜的編程器及編程軟件,采用梯形圖、功能圖、語(yǔ)句表等編程語(yǔ)言,亦有高檔的PLC指令系統(tǒng)。

6.?發(fā)展容錯(cuò)技術(shù)

采用熱備用或并行工作、多數(shù)表決的工作方式。

7.追求軟硬件的標(biāo)準(zhǔn)化。

、國(guó)內(nèi)發(fā)展及應(yīng)用概況

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(19731979)——一位處理器為主的工業(yè)控制器(19791985)——8位微處理器為主的可編程序控制器(1985以后)。在對(duì)外開放政策的推動(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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