描述

3AL78821BAAF01

高可靠性是電氣控制設(shè)備的關(guān)鍵性能。PLC由于采用現(xiàn)代大規(guī)模集成電路技術(shù)，采用嚴(yán)格的生產(chǎn)工藝制造，內(nèi)部電路采取了先進的抗干擾技術(shù)，具有很高的可靠性。例如三菱公司生產(chǎn)的F系列PLC平均無故障時間高達30萬小時。一些使用冗余CPU的PLC的平均無故障工作時間則更長。從PLC的機外電路來說，使用PLC構(gòu)成控制系統(tǒng)，和同等規(guī)模的繼電接觸器系統(tǒng)相比，電氣接線及開關(guān)接點已減少到數(shù)百甚至數(shù)千分之一，故障也就大大降低。此外，PLC帶有硬件故障自我檢測功能，出現(xiàn)故障時可及時發(fā)出警報信息。在應(yīng)用軟件中，應(yīng)用者還可以編入外圍器件的故障自診斷程序，使系統(tǒng)中除PLC以外的電路及設(shè)備也獲得故障自診斷保護。這樣，整個系統(tǒng)具有極高的可靠性也就不奇怪了。PLC發(fā)展到今天，已經(jīng)形成了大、中、小各種規(guī)模的系列化產(chǎn)品。可以用于各種規(guī)模的工業(yè)控制場合。除了邏輯處理功能以外，現(xiàn)代PLC大多具有完善的數(shù)據(jù)運算能力，可用于各種數(shù)字控制領(lǐng)域。近年來PLC的功能單元大量涌現(xiàn)，使PLC滲透到了位置控制、溫度控制、CNC等各種工業(yè)控制中。加上PLC通信能力的增強及人機界面技術(shù)的發(fā)展，使用PLC組成各種控制系統(tǒng)變得非常容易。PLC作為通用工業(yè)控制計算機，是面向工礦企業(yè)的工控設(shè)備。它接口容易，編程語言易于為工程技術(shù)人員接受。梯形圖語言的圖形符號與表達方式和繼電器電路圖相當(dāng)接近，只用PLC的少量開關(guān)量邏輯控制指令就可以方便地實現(xiàn)繼電器電路的功能。為不熟悉電子電路、不懂計算機原理和匯編語言的人使用計算機從事工業(yè)控制打開了方便之門。PLC用存儲邏輯代替接線邏輯，大大減少了控制設(shè)備外部的接線，使控制系統(tǒng)設(shè)計及建造的周期大為縮短，同時維護也變得容易起來。更重要的是使同一設(shè)備經(jīng)過改變程序改變生產(chǎn)過程成為可能。這很適合多品種、小批量的生產(chǎn)場合。?可編程控制器（ProgrammableLogicControllerr），簡稱為PLC，由于其高可靠性，便捷的通訊接口，簡易方便的安裝設(shè)計等特點，廣泛的應(yīng)用于各種工業(yè)邏輯控制領(lǐng)域。燃機循泵控制系統(tǒng)也采用了以微處理為基礎(chǔ)的可編程控制器和工控機構(gòu)成監(jiān)控系統(tǒng)?？刂品绞讲捎肅RT操作員站進行監(jiān)視控制，通過CRT畫面和鍵盤對整個工藝系統(tǒng)進行監(jiān)視和控制，實現(xiàn)對循環(huán)水系統(tǒng)的數(shù)據(jù)采集，處理，圖象顯示，報警，制表和自動順序控制，完成相關(guān)輔助系統(tǒng)的調(diào)節(jié)功能及局部系統(tǒng)的邏輯控制和聯(lián)鎖保護。根據(jù)目前的運行管理情況及考慮今后的管理發(fā)展方象，程序控制系統(tǒng)及被控設(shè)備均按有人和無人化值班方式設(shè)計和配置，并預(yù)留遠(yuǎn)程通訊接口以備今后與其他控制系統(tǒng)實現(xiàn)數(shù)據(jù)通訊和遠(yuǎn)方監(jiān)控。

產(chǎn)品承諾：
保?證?全新原裝進口,
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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3AL78821BAAF01

描述

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