2711-M3A18L1

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描述

2711-M3A18L1

相關(guān)控制功能實(shí)現(xiàn)
? ? 為了防止運(yùn)行時(shí)由于壓力變送器不可預(yù)見(jiàn)的故障造成PLC的PID運(yùn)算調(diào)節(jié)失實(shí)，從而造成管網(wǎng)壓力失恒引發(fā)失壓或爆管的嚴(yán)重事故。我們分別在1#和2#變頻泵后輸水管上安裝壓力變送器，可以同時(shí)測(cè)到出廠輸水管線上的壓力；在PLC程序上對(duì)壓力信號(hào)進(jìn)行了相應(yīng)的處理，在程序中設(shè)置選擇軟開(kāi)關(guān)，調(diào)度人員可以在RSView上將其中一臺(tái)壓力變送器的值設(shè)定為“控制反饋值”，另一臺(tái)壓力變送器的值則設(shè)為“參考反饋值”（見(jiàn)圖2：變頻恒壓供水系統(tǒng)控制圖形界面（RSView工作站））；對(duì)1#壓力和2#壓力值進(jìn)行比較，相差0.1Mpa時(shí)，判斷為，其中一只壓力變送器出現(xiàn)故障，變頻器控制轉(zhuǎn)換為遠(yuǎn)程直接手動(dòng)調(diào)頻控制（通過(guò)RSView設(shè)置運(yùn)行）。壓力變送器正常工作時(shí)，“控制反饋值”經(jīng)過(guò)平均濾波處理后，分別比較壓力報(bào)警上限和下限值，如果超出控制范圍，變頻器控制轉(zhuǎn)換為遠(yuǎn)程直接手動(dòng)調(diào)頻控制，否則“控制反饋值”作為PID調(diào)節(jié)的參數(shù)PV。
? ? 同時(shí)為了在就地手動(dòng)控制實(shí)現(xiàn)在控制現(xiàn)場(chǎng)對(duì)變頻泵進(jìn)行開(kāi)?？刂坪瓦\(yùn)行數(shù)據(jù)監(jiān)視。我們?cè)谧冾l泵工作現(xiàn)場(chǎng)安裝了A-B公司的PanelView圖形工作終端，該工作終端提供圖形交互界面和觸摸輸入方式，以從站的方式與PLC進(jìn)行通信，進(jìn)行數(shù)據(jù)和控制命令的交換，提供就地監(jiān)控操作的通道。

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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專業(yè)銷售進(jìn)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(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。

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