IC660EBA020
IC660EBA020
IC660EBA020
IC660EBA020
一般講DCS由四部份組成：I/O板、控制器、通訊網(wǎng)絡(luò)和操作站。I/O板主要完成模擬和數(shù)字的轉(zhuǎn)換（A/D和D/A轉(zhuǎn)換）；控制器是DCS的核心部件，任務(wù)是完成以PID為主要功能的過程控制；操作站將生產(chǎn)過程與人相連，使人員達(dá)到監(jiān)控、管理生產(chǎn)過程的目的；而通訊網(wǎng)絡(luò)則是控制器與操作站之間的紐帶。
《聯(lián)系人；歐先生》
《座機(jī)：0592-5709825》
《傳真：0592-5917519》
《24小時(shí)熱線：18030229053微信同步》
《QQ ：2479261344》
《QQ郵箱：2479261344@qq.com》
2.1.2 DCS系統(tǒng)的發(fā)展
DCS是繼1969年P(guān)LC問世后，由Honeywell公司在1975年首先推出TDC2000，當(dāng)時(shí)它只有模擬量控制。隨后出現(xiàn)的DCS有MAX-1、RS3、日本橫河的YEPARK MARKⅡ、東芝的TOSDICDCS等。這個(gè)時(shí)期的DCS產(chǎn)品比較注重控制功能的實(shí)現(xiàn)，系統(tǒng)的設(shè)計(jì)重點(diǎn)是現(xiàn)場(chǎng)控制站。人機(jī)界面功能相對(duì)較弱，系統(tǒng)均由專有產(chǎn)品構(gòu)成。
八十年代，隨著微處理器運(yùn)算能力的增強(qiáng)，超大規(guī)模集成電路集成度的提高和成本的不斷降低，第二代DCS產(chǎn)品出現(xiàn)了。它的最大特點(diǎn)是引入了局域網(wǎng)作為系統(tǒng)骨干。在功能上增加了順序控制、邏輯控制等，加強(qiáng)了系統(tǒng)管理站的功能，人機(jī)界面功能更加完善。
八十年代后期，為適應(yīng)信息社會(huì)發(fā)展的需要，加強(qiáng)信息管理，開發(fā)高一層次的信息管理系統(tǒng)，使DCS向高層次發(fā)展，出現(xiàn)了第三代DCS產(chǎn)品。第三代產(chǎn)品在開放性上有了很大改善，增加了上層網(wǎng)絡(luò)，將生產(chǎn)的管理功能納入到系統(tǒng)中。
2.1.3 DCS系統(tǒng)功能
當(dāng)前DCS系統(tǒng)的控制技術(shù)比較成熟和完善的。很多系統(tǒng)開發(fā)商都有自己公司的一整套解決方案。利用現(xiàn)存的技術(shù)將會(huì)享有系統(tǒng)集成容易、可靠性高、操作性好等方面的優(yōu)勢(shì)。
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