描述

FOXBORO-FBM207B

由于現(xiàn)場(chǎng)總線的以上特點(diǎn)，特別是其系統(tǒng)結(jié)構(gòu)的簡(jiǎn)化，使其從設(shè)計(jì)、安裝、投運(yùn)到正常生產(chǎn)運(yùn)行及檢修維護(hù)，都體現(xiàn)出優(yōu)越性。它不僅節(jié)省了硬件數(shù)量與投資，節(jié)省了安裝費(fèi)用，而且系統(tǒng)的維護(hù)開(kāi)銷(xiāo)也大大地降低?，F(xiàn)場(chǎng)總線控制系統(tǒng)不僅精確度與可靠性高，在方便使用和維護(hù)性方面，F(xiàn)CS也比DCS有優(yōu)勢(shì)。FCS使用統(tǒng)一的組態(tài)方式，安裝、運(yùn)行、維修簡(jiǎn)便；利用智能化現(xiàn)場(chǎng)儀表，使維修預(yù)報(bào)（Predicted maintenance）成為可能；由于系統(tǒng)具有互操作性和互用性，用戶(hù)可以自由選擇不同品牌的設(shè)備達(dá)到最佳的系統(tǒng)集成，在設(shè)備出現(xiàn)故障時(shí)，可以自由選擇替換的設(shè)備，保障用戶(hù)的高度系統(tǒng)集成主動(dòng)權(quán)。此外，它還具有設(shè)計(jì)簡(jiǎn)單，易于重構(gòu)等特點(diǎn)。傳統(tǒng)的集散控制系統(tǒng)（DCS系統(tǒng)）具有集中監(jiān)控、分散控制、操作方便的特點(diǎn)。但是，在實(shí)際應(yīng)用中也發(fā)現(xiàn)DCS的結(jié)構(gòu)存在一些不足之處，如控制不能做到徹底分散，危險(xiǎn)仍然相對(duì)集中；由于系統(tǒng)的不開(kāi)放性，不同廠家的產(chǎn)品不能互換、互聯(lián)，限制了用戶(hù)的選擇范圍。利用現(xiàn)場(chǎng)總線技術(shù)，開(kāi)發(fā)FCS系統(tǒng)的目標(biāo)是針對(duì)現(xiàn)存的DCS的某些不足，改進(jìn)控制系統(tǒng)的結(jié)構(gòu)，提高其性能和通用性。
FCS想要在實(shí)際中取代DCS，既要具備DCS所具有的功能，又要能克服DCS的缺點(diǎn)。FCS由于采用了現(xiàn)場(chǎng)總線技術(shù)，在開(kāi)放性、控制分散等方面優(yōu)于傳統(tǒng)DCS。但是由于它是一種新技術(shù)，目前連標(biāo)準(zhǔn)本身都還沒(méi)有制定統(tǒng)一，因此FCS與成熟的DCS相比，還存在下列的一些欠缺。由于現(xiàn)場(chǎng)總線標(biāo)準(zhǔn)本身尚在發(fā)展中，從而給產(chǎn)品的開(kāi)發(fā)和測(cè)試帶來(lái)難度。這在一定程度上造成產(chǎn)品開(kāi)發(fā)商、生產(chǎn)商少，產(chǎn)品品種單一而且價(jià)格昂貴。
在某些場(chǎng)合中，F(xiàn)CS還無(wú)法提供DCS已有的控制功能。由于軟硬件水平的限制，其功能塊的功能還不是很強(qiáng)，品種也不夠齊全；用現(xiàn)場(chǎng)儀表還只能組成一般的控制回路如單回路、串級(jí)、比例控制等，對(duì)于復(fù)雜的、先進(jìn)的控制算法還無(wú)法在儀表中實(shí)現(xiàn)，對(duì)于單回路內(nèi)有多輸入、多輸出的情況缺乏好的解決方案。

產(chǎn)品承諾：
保?證?全新原裝進(jìn)口,
保?證?安全準(zhǔn)時(shí)發(fā)貨，
保?證售后服務(wù)質(zhì)量，
優(yōu)勢(shì)價(jià)格，大量現(xiàn)貨。

主營(yíng)DCS系統(tǒng)配件
機(jī)器人系統(tǒng)配件
大型伺服系統(tǒng)配件
品牌：ABB???,AB??,GE,FOXBORO,本特利，英維思，伍德沃德，西屋，瑞恩，施耐德，西門(mén)子，摩托羅拉，安川。力士樂(lè)。ACSO，橫河等進(jìn)口品牌。Triconex?Siemens?Yaskawa?ABB?GE?Ovation?AB?Foxboro?Motorola?Schneider?XYCOM?KUKA

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