描述

DS200SDCCG5AHD

比較的前題是DCS系統(tǒng)與典型的、理想的FCS系統(tǒng)進(jìn)行比較。為什么要做如此的假設(shè)。做為DCS系統(tǒng)發(fā)展到今天，開發(fā)初期提出的技術(shù)要求卻已滿足并得到了完善，目前的狀況是進(jìn)一步提高，因此也就不存在典型、理想的說法。而作為FCS系統(tǒng)，90年代剛進(jìn)入實用化，作為開發(fā)初期的技術(shù)要求：兼容開放，雙向數(shù)字通信、數(shù)字智能現(xiàn)場裝置、高速總線等，目前還不理想有待完善。這種狀態(tài)與現(xiàn)場總線國際標(biāo)準(zhǔn)的制定不能說沒有關(guān)系。過去的十多年，各總線組織都忙于制定標(biāo)準(zhǔn)，開發(fā)產(chǎn)品，占領(lǐng)更多的市場，目的就是要擠身于國際標(biāo)準(zhǔn)，合法的占領(lǐng)更大的市場。現(xiàn)在有關(guān)國際標(biāo)準(zhǔn)的爭戰(zhàn)已告一段落，各大公司組織都已意識到，要真正占領(lǐng)市場，就得完善系統(tǒng)及相關(guān)產(chǎn)品。我們可以做這樣的預(yù)測，不久的將來，完善的現(xiàn)場總線系統(tǒng)及相關(guān)產(chǎn)品必須成為世界現(xiàn)場總線技術(shù)的主流。DCS系統(tǒng)是個大系統(tǒng)，其控制器功能強而且在系統(tǒng)中的作用十分重要，數(shù)據(jù)公路更是系統(tǒng)的關(guān)鍵，所以，必須整體投資一步到位，事后的擴容難度較大。而FCS功能下放較徹底，信息處理現(xiàn)場化，數(shù)字智能現(xiàn)場裝置的廣泛采用，使得控制器功能與重要性相對減弱。因此，F(xiàn)CS系統(tǒng)投資起點低，可以邊用、邊擴、邊投運。
DCS系統(tǒng)是封閉式系統(tǒng)，各公司產(chǎn)品基本不兼容。而FCS系統(tǒng)是開放式系統(tǒng)，用戶可以選擇不同廠商、不同品牌的各種設(shè)備連入現(xiàn)場總線，達(dá)到最佳的系統(tǒng)集成。
DCS系統(tǒng)的信息全都是二進(jìn)制或模擬信號形成的，必須有D/A與A/D轉(zhuǎn)換。而FCS系統(tǒng)是全數(shù)字化，就免去了D/A與A/D變換，高集成化高性能，使精度可以從±0.5%提高到±0.1%。
FCS系統(tǒng)可以將PID閉環(huán)控制功能裝入變送器或執(zhí)行器中，縮短了控制周期，目前可以從DCS的每秒2~5次，提高到FCS的每秒10~20次，從而改善調(diào)節(jié)性能。

產(chǎn)品承諾：
保?證?全新原裝進(jìn)口,
保?證?安全準(zhǔn)時發(fā)貨，
保?證售后服務(wù)質(zhì)量，
優(yōu)勢價格，大量現(xiàn)貨。

主營DCS系統(tǒng)配件
機器人系統(tǒng)配件
大型伺服系統(tǒng)配件
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Triconex?Siemens?Yaskawa?ABB?GE?Ovation?AB?Foxboro?Motorola?Schneider?XYCOM?KUKA ? 專業(yè)銷售進(jìn)口DCS? PLC系統(tǒng)備件模塊 15天包退換 一年質(zhì)保 大量現(xiàn)貨? 國內(nèi)實力庫存商家

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專業(yè)銷售進(jìn)口DCS? PLC系統(tǒng)備件模塊

PLC模塊，可編程控制器，CPU模塊，IO模塊，AI模塊，通訊模塊。AB/施耐德/ABB/GE/本特利/西屋/英維斯/霍尼韋爾/黑馬/FU克斯波羅

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