描述
SCHNEIDER-140ACI03000
過程控制要用到模擬量。模擬量一般是指連續(xù)變化的量,如電流、電壓、溫度、壓力等物理量。過程控制的目的就是,根據(jù)有關(guān)模擬量的當(dāng)前與歷史的輸入狀況,產(chǎn)生所要求的開關(guān)量、或模擬量輸出,以使系統(tǒng)工作參數(shù)能按一定要求工作。是連續(xù)生產(chǎn)過程最常用的控制。
過程控制的類型很多。
PLC用于過程控制,已是一個(gè)趨勢(shì)。因?yàn)橛肞LC實(shí)現(xiàn)這個(gè)控制,其價(jià)格比用別的要低,而且,用它時(shí),在進(jìn)行模擬量控制的同時(shí),還可很方便的進(jìn)行其它控制。再加上各種過程控制模塊的開發(fā)與應(yīng)用,以及相關(guān)軟件的推出及使用,用PLC進(jìn)行種種過程控制已變得很容易,其編程也很簡(jiǎn)便。所以,目前有的廠家PLC用于模擬量控制的份額,已超過用于順序控制。
用于運(yùn)動(dòng)控制
運(yùn)動(dòng)控制主要指,對(duì)工作對(duì)象的位置、速度及加速度所作的控制??梢允菃巫鴺?biāo),即控制對(duì)象作直線運(yùn)動(dòng);也可是多坐標(biāo)的,控制對(duì)象的平面、立體,以至于角度變換等運(yùn)動(dòng)。有時(shí),還可控制多個(gè)對(duì)象,而這些對(duì)象間的運(yùn)動(dòng)可能還要有協(xié)調(diào)。
上個(gè)世紀(jì)50年代誕生于美國(guó)的數(shù)控技術(shù),簡(jiǎn)稱數(shù)控(NC),就是基于電子計(jì)算機(jī)及這個(gè)脈沖量的應(yīng)用而不斷發(fā)展與完善的運(yùn)動(dòng)控制技術(shù)。而今,已發(fā)展到非常完善的境地,已是成為當(dāng)今自動(dòng)化技術(shù)的一個(gè)重要支柱。
PLC也已具備處理脈沖量的能力。PLC有脈沖信號(hào)輸入點(diǎn)或模塊,可接收脈沖量輸入(PI)。PLC有脈沖信號(hào)輸出點(diǎn)或模塊,可輸出脈沖量(PO)。有了處理PI / PO這兩種功能,加上PLC已有數(shù)據(jù)處理及運(yùn)算能力,完全可以依NC的原理進(jìn)行運(yùn)動(dòng)控制。
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,西門子,摩托羅拉,安川。力士樂。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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