3HAC14549-3/12A

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描述

3HAC14549-3/12A

?在自動化的許多領(lǐng)域,有效性的要求越來越高,因而對自動化系統(tǒng)的容錯水平的要求也變得越來越高,尤其在設(shè)備停機代價非常大的場合。為了滿足這些嚴格的要求,在DCS系統(tǒng)中通常采用冗余技術(shù),這樣才能夠滿足這些領(lǐng)域所需要的安全性、可靠性和有效性的標準。
? ? 在DCS控制系統(tǒng)中,分布處理單元是系統(tǒng)關(guān)鍵的部分。當前這些分布處理單元的控制器往往是基于86系列CPU建構(gòu)的,這種架構(gòu)目前被廣泛采用。但是由于86系列分布處理單元的特點,導(dǎo)致現(xiàn)在的控制器處理單元存在很多的缺點,如放熱量大等。而且在封閉的環(huán)境中,這些問題始終很難解決。隨著很多低功耗技術(shù)的發(fā)展和低功耗控制器的出現(xiàn),分布處理單元的CPU可以有更多的選擇,尤其是低功耗的控制器產(chǎn)生很少的熱量,且可以使系統(tǒng)的集成度更高。
? ? 無論是國內(nèi)還是國外的DCS控制系統(tǒng)之間有多大區(qū)別,冗余技術(shù)在這些DCS控制系統(tǒng)中都被廣泛采用。DCS控制系統(tǒng)中主要采用了網(wǎng)絡(luò)冗余技術(shù)、分布處理單元冗余技術(shù)、IO卡件冗余技術(shù)、電源冗余技術(shù)等。
? ??1、DCS系統(tǒng)的模型
? ? DCS控制系統(tǒng)是控制技術(shù)、計算機技術(shù)、通信技術(shù)及圖形顯示技術(shù)相結(jié)合的產(chǎn)物,其一般的體系結(jié)構(gòu)見圖1。由圖1DCS控制系統(tǒng)模型框圖可知,DPU指的是分布處理單元。DCS控制系統(tǒng)的體系結(jié)構(gòu)分為3層:過程控制層、監(jiān)控層和管理層。其中過程控制層是DCS系統(tǒng)控制的基礎(chǔ),其設(shè)備的主要功能是控制接口、現(xiàn)場控制單元、檢測儀表和執(zhí)行機構(gòu);監(jiān)控層主要由監(jiān)控計算機、高級操作站和接口裝置構(gòu)成,主要負責(zé)操作監(jiān)視、系統(tǒng)報警、趨勢顯示及系統(tǒng)診斷等功能;管理層主要由管理計算機組成,負責(zé)整個系統(tǒng)的管理工作。

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


選擇深圳長欣,選擇放心,售后無憂大量現(xiàn)貨,當天順豐發(fā)貨!
主營:本特利,英維思,伍德沃德,??怂共_、西屋、瑞恩、施耐德莫迪康、ABB、AB、西門子、摩托羅拉、GE發(fā)那科、安川、博世力士樂,ACSO,力士樂等各大品牌的DCS系統(tǒng)配件,機器人系統(tǒng)配件,大型伺服系統(tǒng)備件。

先介紹幾點經(jīng)驗。
1、先通讀一遍“系統(tǒng)手冊”(不管能不能看懂,先了解個大概,以便學(xué)習(xí)編程時查找);
2、由位控邏輯入手,逐漸增加定時、計數(shù)等條件,把或、與、非關(guān)系理順;
3、進而練習(xí)整數(shù)運算、實數(shù)運算、類型轉(zhuǎn)換;
4、量程轉(zhuǎn)換、PID調(diào)節(jié)回路的建立及P、I、D參數(shù)的理解(最好是有個物理回路驗證,比如變頻器+電機+測速傳感器);
5、循環(huán)、順序、跳轉(zhuǎn)等程序控制(盡量避免跳轉(zhuǎn),非跳不可時也是跳的越近越好);
6、中斷、通訊、位置控制....

本人以ABB工業(yè)機器人配件DSQC系列和Motorola MVME系列,GE 卡件 模塊 驅(qū)動器系列為主攻。各位電工朋友可根據(jù)自己的條件選擇適合自己的PLC品牌,由于PLC的基本框架大同小異,學(xué)會一種至于其它的學(xué)習(xí)起來也就簡單了。