描述
2711P-T10C15D1
PLC與工業(yè)控制計算機(IPC)和集散控制系統(tǒng)(DCS)的比較
各自技術(shù)發(fā)展的起源
計算機是為了滿足快速大量數(shù)據(jù)處理要求的設(shè)備。硬件結(jié)構(gòu)方面，總線標準化程度高，兼容性強，軟件資源豐富，特別是有實時操作系統(tǒng)的支持，故對要求快速、實時性強、模型復(fù)雜和計算工作量大的工業(yè)對象的控制占有優(yōu)勢。集散系統(tǒng)從工業(yè)自動化儀表控制系統(tǒng)發(fā)展到以工業(yè)控制計算機為中心的集散系統(tǒng)，所以其在模擬量處理、回路調(diào)節(jié)方面具有一定優(yōu)勢，初期主要用在連續(xù)過程控制，側(cè)重回路調(diào)節(jié)功能。
PLC是由繼電器邏輯系統(tǒng)發(fā)展而來，主要用在離散制造、工序控制，初期主要是代替繼電器控制系統(tǒng)，側(cè)重于開關(guān)量順序控制方面。
近年來隨著微電子技術(shù)、大規(guī)模集成電路技術(shù)、計算機技術(shù)和通信技術(shù)等的發(fā)展，PLC在技術(shù)和功能上發(fā)生了飛躍。在初期邏輯運算的基礎(chǔ)上，增加了數(shù)值運算、閉環(huán)調(diào)節(jié)等功能，增加了模擬量和PID調(diào)節(jié)等功能模塊；運算速度提高，CPU的能力趕上了工業(yè)控制計算機；通信能力的提高發(fā)展了多種局部總線和網(wǎng)絡(luò)(LAN)，因而也可構(gòu)成為一個集散系統(tǒng)。特別是個人計算機也被吸收到PLC系統(tǒng)中。
PLC在過程控制的發(fā)展將是一智能變送器和現(xiàn)場總線，暨向下拓展功能，開放總線。
產(chǎn)品承諾：
保?證?全新原裝進口,
保?證?安全準時發(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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專業(yè)銷售進口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
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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