福州聚福興自動化有限公司

190S-ANKA2-CB40C現(xiàn)貨

福州聚福興自動化有限公司是一家專業(yè)提供工業(yè)自動化領(lǐng)域的備件服務(wù)商，我們主營PLC模塊，DCS卡件，ESD系統(tǒng)卡件，振動監(jiān)測系統(tǒng)卡件，汽輪機控制系統(tǒng)模塊，燃氣發(fā)電機備件，我們與的多家PLC，DCS產(chǎn)品維護服務(wù)供應(yīng)商建立了緊密的合作關(guān)系。
公司以電子商務(wù)模式運營、縮減中間環(huán)節(jié)、為消費者在時間提供的產(chǎn)品及滿意的服務(wù)，公司擁有完善的物流供應(yīng)系統(tǒng)、現(xiàn)已與眾多國外品牌生產(chǎn)廠商建立了良好的合作關(guān)系。 我司能直接從境外進貨、能夠提供不同國別、廠商的設(shè)備以及備件、解決您多處尋找的麻煩或?qū)Ξa(chǎn)品質(zhì)量問題的擔心等，在價格上我們有很大的優(yōu)勢、產(chǎn)品詳細信息、竭誠歡迎您來電查詢或使用E-mail 查詢！
公司經(jīng)銷產(chǎn)品廣泛應(yīng)用于數(shù)控機械 冶金、石油天然氣、石油化工、化工、造紙印刷、紡織印染、機械、電子制造、汽車制造、煙草、塑膠機械、電力、水利、水處理/環(huán)保、市政工程、鍋爐供暖、能源、輸配電等行業(yè)。

2、從系統(tǒng)結(jié)構(gòu)來說:
PLC與DCS的基本結(jié)構(gòu)是一樣的。PLC發(fā)展到今天，已經(jīng)全面移植到計算機系統(tǒng)控制上了，傳統(tǒng)的編程器早就被淘汰。小型應(yīng)用的PLC一般使用觸摸屏，大規(guī)模應(yīng)用的PLC全面使用計算機系統(tǒng)。和DCS一樣，控制器與IO站使用現(xiàn)場總線（一般都是基于RS485或RS232異步串口通訊協(xié)議的總線方式），控制器與計算機之間如果沒有擴展的要求，也就是說只使用一臺計算機的情況下，也會使用這個總線通訊。但如果有不止一臺的計算機使用，系統(tǒng)結(jié)構(gòu)就會和DCS一樣，上位機平臺使用以太網(wǎng)結(jié)構(gòu)。這是PLC大型化后和DCS概念模糊的原因之一。
3、PLC和DCS的發(fā)展方向:
小型化的PLC將向更專業(yè)化的使用角度發(fā)展，比如功能更加有針對性、對應(yīng)用的環(huán)境更有針對性等等。大型的PLC與DCS的界線逐步淡化，直至完全融和。
DCS將向FCS的方向繼續(xù)發(fā)展。FCS的核心除了控制系統(tǒng)更加分散化以外，特別重要的是儀表。FCS在國外的應(yīng)用已經(jīng)發(fā)展到儀表級。控制系統(tǒng)需要處理的只是信號采集和提供人機界面以及邏輯控制，整個模擬量的控制分散到現(xiàn)場儀表，儀表與控制系統(tǒng)之間無需傳統(tǒng)電纜連接，使用現(xiàn)場總線連接整個儀表系統(tǒng)。(目前國內(nèi)有橫河在中海殼牌石化項目中用到了FCS,儀表級采用的是智能化儀表例如:EJX等，具備先進的控制水準)。
○如何正確對待PLC和DCS
我個人從不強調(diào)PLC和DCS之間孰優(yōu)孰劣，我把它們使用了一個新名詞“控制類產(chǎn)品”。我們提供給用戶的是適合用戶的控制系統(tǒng)。絕大多數(shù)用戶不會因為想使用一套DCS而去使用DCS，控制類產(chǎn)品必須定位在滿足用戶的工藝要求的基礎(chǔ)之上。其實提出使用DCS還是PLC的用戶大抵是從沒接觸過自控產(chǎn)品或有某種特殊需求的。過分強調(diào)這個東東只會陷入口舌之爭。
從PLC與DCS之間的區(qū)別和共同之處我們了解了控制類產(chǎn)品的大抵情況。注意，作為專業(yè)人士，我們自己不要為產(chǎn)品下PLC還是DCS的定義，自己的心理上更不能把產(chǎn)品這樣來區(qū)別對待。

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