ABB SR511

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選擇深圳長(zhǎng)欣,選擇放心,售后無(wú)憂
大量現(xiàn)貨,當(dāng)天順豐發(fā)貨!
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Email:sales@cxplcmro.com

描述

ABB SR511
計(jì)算機(jī)面向?qū)ο缶幊痰膬?yōu)點(diǎn)也有重用性和易管理型,在PLC中也曾在,以Step7為例,需要討論FC和FB的差異。觀察數(shù)據(jù)類型,F(xiàn)B比FC只不過(guò)多一個(gè)“STAT”類型,在使用上FB需要背景DB,F(xiàn)C不需要,但就這個(gè)差別導(dǎo)致FB擁有自己獨(dú)立的數(shù)據(jù)儲(chǔ)存空間,而FC的數(shù)據(jù)儲(chǔ)存卻必須借助公有變量(如中間變量M或者共享DB),有這樣一種準(zhǔn)則,程序塊的獨(dú)立性越強(qiáng),其重用性也越好,產(chǎn)生數(shù)據(jù)訪問(wèn)沖突的可能性也更少,則更易于管理。有些公司生產(chǎn)的PLC,其程序語(yǔ)言沒(méi)有類似FB的這種特性,這時(shí)可以采用類似“FC+共享DB”的替代方案解決,但它的獨(dú)立性已經(jīng)大大降低。
同樣的代碼的獨(dú)立性是標(biāo)準(zhǔn)制定的一個(gè)重要環(huán)節(jié),很難想象一個(gè)與其他功能塊之間有著千絲萬(wàn)縷聯(lián)系的功能塊能夠被作為標(biāo)準(zhǔn)塊在不同工程中有效的重復(fù)使用。
縱觀計(jì)算機(jī)語(yǔ)言的發(fā)展,最開(kāi)始的編程都是令人恐怖的,而當(dāng)今的編程讓人們得到很大的解脫,有很多現(xiàn)成的標(biāo)準(zhǔn)類庫(kù)實(shí)用,人們可以把更多的編程精力放在實(shí)現(xiàn)功能本身上,plc編程也應(yīng)該朝這種方向發(fā)展,應(yīng)該讓更多的人從事應(yīng)用層面的設(shè)計(jì),那些標(biāo)準(zhǔn)功能塊不應(yīng)該重復(fù)的被不同人員開(kāi)發(fā),雖然各大PLC廠開(kāi)發(fā)了大量的程序庫(kù),但工業(yè)控制對(duì)象各式各樣,不同行業(yè)都應(yīng)該擁有自己的程序庫(kù),而代碼的可重用性是評(píng)價(jià)這些功能塊好壞的關(guān)鍵。

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(mén)子,摩托羅拉,安川。力士樂(lè)。ACSO,橫河等進(jìn)口品牌。 專業(yè)銷售進(jìn)口DCS? PLC系統(tǒng)備件模塊
Triconex?Siemens?Yaskawa?ABB?GE?Ovation?AB?Foxboro?Motorola?Schneider?XYCOM?KUKA
? 專業(yè)銷售進(jìn)口DCS? PLC系統(tǒng)備件模塊 15天包退換 一年質(zhì)保 大量現(xiàn)貨? 國(guó)內(nèi)實(shí)力庫(kù)存商家

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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(guó)內(nèi)實(shí)力庫(kù)存商家


選擇深圳長(zhǎng)欣,選擇放心,售后無(wú)憂大量現(xiàn)貨,當(dāng)天順豐發(fā)貨!
主營(yíng):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(mén)子、摩托羅拉、GE發(fā)那科、安川、博世力士樂(lè),ACSO,力士樂(lè)等各大品牌的DCS系統(tǒng)配件,機(jī)器人系統(tǒng)配件,大型伺服系統(tǒng)備件。

先介紹幾點(diǎn)經(jīng)驗(yàn)。
1、先通讀一遍“系統(tǒng)手冊(cè)”(不管能不能看懂,先了解個(gè)大概,以便學(xué)習(xí)編程時(shí)查找);
2、由位控邏輯入手,逐漸增加定時(shí)、計(jì)數(shù)等條件,把或、與、非關(guān)系理順;
3、進(jìn)而練習(xí)整數(shù)運(yùn)算、實(shí)數(shù)運(yùn)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(gè)物理回路驗(yàn)證,比如變頻器+電機(jī)+測(cè)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(shí)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(jī)器人配件DSQC系列和Motorola MVME系列,GE 卡件 模塊 驅(qū)動(dòng)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(huì)一種至于其它的學(xué)習(xí)起來(lái)也就簡(jiǎn)單了。