PCI-7334

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描述

PCI-7334

PLC維修工作中,外圍線路由現(xiàn)場輸入信號(如按鈕開關、選擇開關、接近開關及一些傳感器輸出的開關量、繼電器輸出觸點或模數(shù)轉(zhuǎn)換器轉(zhuǎn)換的模擬量等)和現(xiàn)場輸出信號(電磁閥、繼電器、接觸器、電機等),以及導線和接線端子等組成。PLC維修時我們發(fā)現(xiàn),接線松動、元器件損壞、機械故障、干擾等均可引起外圍電路故障。所以,PLC維修時排查要仔細,替換的元器件要選用性能可靠安全系數(shù)高的優(yōu)質(zhì)器件。一些功能強大的控制系統(tǒng)采用故障代碼表表示故障,對故障的分析排除帶來極大便利,PLC維修時應好好利用。

PLC維修實例:水下切粒機的控制系統(tǒng)出現(xiàn)故障,PLC維修工程師發(fā)現(xiàn)I5.4無輸入導致Q7.0無輸出,切粒機無法開啟。檢查后發(fā)現(xiàn)信號轉(zhuǎn)換器和接近開關同時損壞,更換后正常。PLC維修時,象這類故障就具有一定的隱蔽性,排故時要借助萬用表、系統(tǒng)原理圖和邏輯圖逐級排除。PLC控制系統(tǒng)綜合了數(shù)字電路、模擬電路、繼電回路和計算機技術,具有較高的穩(wěn)定性和可靠性,但一旦出現(xiàn)故障就會造成整個系統(tǒng)停機損失較大,PLC維修有一定困難且維修費用也較高,借助的維修工具除了萬用表有時還要用到示波器甚至計算機,這就要求PLC維修人員具有較高的專業(yè)技能,并且有一定的外語和計算機功底,只有對整個系統(tǒng)了解和熟悉后才能對常見的故障做到判斷迅速、排除迅速,并盡可能地降低維修費用,確保系統(tǒng)的正常穩(wěn)定。

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,以便學習編程時查找);
2、由位控邏輯入手,逐漸增加定時、計數(shù)等條件,把或、與、非關系理順;
3、進而練習整數(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,學會一種至于其它的學習起來也就簡單了。