描述

SUN 5148-04

在工業(yè)自動(dòng)化領(lǐng)域，可編程控制器(PLC)作為自動(dòng)控制以成為大多數(shù)自動(dòng)化系統(tǒng)的設(shè)備基礎(chǔ)，同時(shí)也給工業(yè)控制帶來了前所未有的非凡變化。使用PLC的工業(yè)控制系統(tǒng)與傳統(tǒng)的用繼電器的工業(yè)控制系統(tǒng)相比，在操作、控制、效率和精度等各個(gè)方面都具有無法比擬的優(yōu)點(diǎn)。雖然在工業(yè)控制系統(tǒng)中所使用的繼電器控制設(shè)備不會(huì)被完全淘汰，但是由于PLC的出現(xiàn)已經(jīng)改變了工業(yè)控制設(shè)計(jì)者的設(shè)計(jì)思想今天繼電器已應(yīng)用到家庭及工業(yè)控制的各個(gè)領(lǐng)域。他們比以往的產(chǎn)品具有更高的可靠性。但是，這也是隨之帶來的一些問題。如絕大多數(shù)控制繼電器都是長期磨損和疲勞工作條件下進(jìn)行的，容易損壞。而且繼電器的觸點(diǎn)容易產(chǎn)生電弧，甚至?xí)墼谝黄甬a(chǎn)生誤操作，引起嚴(yán)重的后果。再者，對(duì)一個(gè)具體使用的裝有上百個(gè)繼電器的設(shè)備，其控制箱將是龐大而笨重的。在全負(fù)荷運(yùn)載的情況下，大的繼電器將產(chǎn)生大量的熱及噪聲，同時(shí)也消耗了大量的電能。并且繼電器控制系統(tǒng)必須是手工接線、安裝，如果有簡單的改動(dòng)，也需要花費(fèi)大量時(shí)間及人力和物力去改制、安裝和調(diào)試?？删幊炭刂破饕泽w積小功能強(qiáng)大所著稱，它不但可以很容易地完成順序邏輯、運(yùn)動(dòng)控制、定時(shí)控制、計(jì)數(shù)控制、數(shù)字運(yùn)算、數(shù)據(jù)處理等功能，而且可以通過輸入輸出接口建立與各類生產(chǎn)機(jī)械數(shù)字量和模擬量的聯(lián)系，從而實(shí)現(xiàn)生產(chǎn)過程的自動(dòng)控制。特別是現(xiàn)在，由于信息、網(wǎng)絡(luò)時(shí)代的到來，擴(kuò)展了PLC的功能，使它具有很強(qiáng)的聯(lián)網(wǎng)通訊能力，從而更廣泛地應(yīng)用于眾多行業(yè)。順序控制是PLC最基本、應(yīng)用最廣泛的領(lǐng)域。所謂的順序控制，就是按照工藝流程的順序，在控制信號(hào)的作用下，使得生產(chǎn)過程的各個(gè)執(zhí)行機(jī)構(gòu)自動(dòng)地按照順序動(dòng)作。由于它還具有編程設(shè)計(jì)靈活、速度快、可靠性高、成本低、便于維護(hù)等優(yōu)點(diǎn)，所以在實(shí)現(xiàn)單機(jī)控制、多機(jī)群控制、生產(chǎn)流程控制中可以完全取代傳統(tǒng)的繼電器接觸器控制系統(tǒng)。它主要是根據(jù)操作按扭、限位開關(guān)及其它現(xiàn)場(chǎng)給來的指令信號(hào)和傳感器信號(hào)，控制機(jī)械運(yùn)動(dòng)部件進(jìn)行相應(yīng)的操作，從而達(dá)到了自動(dòng)化生產(chǎn)線控制。比較典型應(yīng)用在自動(dòng)電梯的控制、管道上電磁伐的自動(dòng)開啟和關(guān)閉、皮帶運(yùn)輸機(jī)的順序啟動(dòng)等。例如我分廠的原料混料系統(tǒng)就是利用了PLC的順序控制功能。

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DCS系統(tǒng)配件
機(jī)器人系統(tǒng)配件
大型伺服系統(tǒng)配件
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