IC693MDL750RR
由上述內(nèi)容很容易看出：SCADA，DCS是一種概念，而PLC是一種產(chǎn)品，三者不具可比性：
1、PLC是一種產(chǎn)品，由它可以構(gòu)成SCADA，DCS；
2、DCS 是過程控制發(fā)展起來(lái)的，PLC是繼電器—邏輯控制系統(tǒng)發(fā)展起來(lái)的；
3、PLC 是設(shè)備，DCS，SCADA是系統(tǒng)。
狹義地說，DCS主要用于過程自動(dòng)化，PLC主要用于工廠自動(dòng)化（生產(chǎn)線），SCADA 主要針對(duì)廣域的需求，如油田，綿延千里的管線。如果從計(jì)算機(jī)和網(wǎng)絡(luò)的角度來(lái)說，它們是統(tǒng)一的，之所以有區(qū)別，主要在應(yīng)用的需求， DCS常常要求高級(jí)的控制算法。如在煉油行業(yè)，PLC對(duì)處理速度要求高，因?yàn)榻?jīng)常用在聯(lián)鎖上，甚至是故障安全系統(tǒng)，SCADA也有一些特殊要求，如振動(dòng)監(jiān)測(cè)，流量計(jì)算，調(diào)峰調(diào)谷等等。
因此，也可以簡(jiǎn)單的認(rèn)為：
SCADA是調(diào)度管理層
DCS是廠站管理層
PLC是現(xiàn)場(chǎng)設(shè)備層
SCADA系統(tǒng)是一個(gè)歷史悠久，但仍處于快速發(fā)展中的“新生”事物，具有系統(tǒng)復(fù)雜、接口標(biāo)準(zhǔn)開放與Internet網(wǎng)絡(luò)深度融合等特點(diǎn)，需要整合產(chǎn)、學(xué)、研、用各方面的研究SCADA系統(tǒng)的信息安全理論和技術(shù)，鼓勵(lì)國(guó)內(nèi)SCADA系統(tǒng)廠商進(jìn)行技術(shù)積累和創(chuàng)新，培養(yǎng)達(dá)到世界先進(jìn)水平的SCADA系統(tǒng)技術(shù)研發(fā)團(tuán)隊(duì)，逐步在重點(diǎn)行業(yè)中推廣使用自主知識(shí)產(chǎn)權(quán)的國(guó)產(chǎn)化SCADA系統(tǒng)替換國(guó)外系統(tǒng)。
IC693MDL750RR
PTQ-PDPMV1
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IC693MDL750RR
