MAC071C-0-GS-4-C/095-A-0/J521LX
MAC071C-0-GS-4-C/095-A-0/J521LX
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這類(lèi)故障一般是由于變頻器運(yùn)行參數(shù)設(shè)定不合適，或外部工況、條件不滿(mǎn)足變頻器使用要求所產(chǎn)生的一種保護(hù)動(dòng)作現(xiàn)象；另一類(lèi)是由于使用環(huán)境惡劣，高溫、導(dǎo)電粉塵引起的短路、潮濕引起的絕緣降低或擊穿等突發(fā)故障(嚴(yán)重時(shí)，會(huì)出現(xiàn)打火、爆炸等異常現(xiàn)象)。這類(lèi)故障發(fā)生后，一般會(huì)使變頻器無(wú)任何顯示，其處理方法是先對(duì)變頻器解體檢查，重點(diǎn)查找損壞件，根據(jù)故障發(fā)生區(qū)，進(jìn)行清理、測(cè)量、更換，然后全面測(cè)試，再恢復(fù)系統(tǒng)，空載試運(yùn)行，觀察觸發(fā)回路輸出側(cè)的波形，當(dāng)6組波形大小、相位差相等后，再加載運(yùn)行，達(dá)到解決故障的目的。本文主要闡述第二類(lèi)故障的分析和處理方法
大多數(shù)有關(guān)PLC的故障是外圍接口信號(hào)故障，所以在維修時(shí)，只要PLC有些部分控制的動(dòng)作正常，都不應(yīng)該懷疑PLC程序。如果通過(guò)診斷確認(rèn)運(yùn)算程序有輸出，而PLC的物理接口沒(méi)有輸出，則為硬件接口電路故障。另外硬件故障多于軟件故障，大多是由外部信號(hào)不滿(mǎn)足或執(zhí)行元件故障引起，而不是PLC系統(tǒng)的問(wèn)題。
隨著現(xiàn)代工業(yè)設(shè)備自動(dòng)化，越來(lái)越多的工廠設(shè)備將采用PLC人機(jī)界面等自動(dòng)化器件來(lái)控制，因此設(shè)備自動(dòng)化程度越來(lái)越高。對(duì)設(shè)備的維護(hù)人員的技術(shù)要求越來(lái)越嚴(yán)格。作為一名合格的技術(shù)員，需要掌握的技能也越來(lái)越多，越來(lái)越全面性，以此來(lái)滿(mǎn)足自動(dòng)化的發(fā)展及要求
現(xiàn)在許多 PLC 采用和計(jì)算機(jī)聯(lián)接，并利用專(zhuān)用的工具軟件進(jìn)行編程或監(jiān)控。
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電力拖動(dòng)方案選擇是電氣控制系統(tǒng)設(shè)計(jì)的主要內(nèi)容之一，也是以后各部分設(shè)計(jì)內(nèi)容的基礎(chǔ)和先決條件。什么是電力拖動(dòng)方案呢？所謂電力拖動(dòng)方案是指根據(jù)零件加工精度、加工效率要求、生產(chǎn)機(jī)械的結(jié)構(gòu)、運(yùn)動(dòng)部件的數(shù)量、運(yùn)動(dòng)要求、負(fù)載性質(zhì)、調(diào)速要求以及投資額等條件去確定電動(dòng)機(jī)的類(lèi)型、數(shù)量、傳動(dòng)方式以及擬訂電動(dòng)機(jī)起動(dòng)、運(yùn)行、調(diào)速、轉(zhuǎn)向、制動(dòng)等控制要求
在工業(yè)自動(dòng)化領(lǐng)域，PLC和工控機(jī)是人們不得不提的兩類(lèi)控制設(shè)備，它們是大多數(shù)自動(dòng)化系統(tǒng)的基礎(chǔ)設(shè)備。PLC和工控機(jī)的最新技術(shù)發(fā)展是工程師對(duì)設(shè)備應(yīng)用性能要求的完美體現(xiàn)：控制器的硬件標(biāo)準(zhǔn)化，以及用戶(hù)的各種控制要求通過(guò)軟件來(lái)進(jìn)行改變。PLC就是一種利用計(jì)算機(jī)原理為順序控制專(zhuān)門(mén)設(shè)計(jì)的、通用的、使用方便的裝置。它采用了專(zhuān)用設(shè)計(jì)的硬件，而使用性能都是通過(guò)控制程序來(lái)確定的。工控機(jī)則是利用了個(gè)人計(jì)算機(jī)的PCI總線和PC/104總線、采用功能板卡擴(kuò)展控制I/O點(diǎn)來(lái)實(shí)現(xiàn)計(jì)算機(jī)控制的一種方便的控制設(shè)備。它具有工業(yè)現(xiàn)場(chǎng)應(yīng)用特性，同時(shí)又極大地利用了PC機(jī)的軟件環(huán)境，用戶(hù)可以方便地選擇各制造商提供的產(chǎn)品。
變頻器通電后無(wú)顯示，也是較常見(jiàn)的故障現(xiàn)象之一，引起這類(lèi)故障原因，多數(shù)也是由于開(kāi)關(guān)電源的損壞所致。如MF系列變頻器的開(kāi)關(guān)電源采用的是較常見(jiàn)的反激式開(kāi)關(guān)電源控制方式，開(kāi)關(guān)電源的輸出級(jí)電路發(fā)生短路也會(huì)引起開(kāi)關(guān)電源損壞，從而導(dǎo)致變頻器無(wú)顯示。
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TOMTECNON-STERILIZEDPOLYPROPYLENEPIPETTETIPS196-20
TWDLCAA16DRF
SGDA-01AS
MSK076C-0450-NN-S1-UG0-NNNNR911315661
UNYCSPSDUMET
IC600KD510RR
施耐德TSXSCP114
P0151HDConnector,Coax
3HAC020813-139
BL-MC75E-20TB現(xiàn)貨
GEIC697BEM731C3
DDO02
ALLENBRADLEY42CMB2LPBED4USPP42CMB2LPBED4
CONDORCPCI-204-12031
140DDI35300
172JNN21032
R911306619HAS01.1-075-072-MN《卓凱惠價(jià)速銷(xiāo)》
PASTERNACK92623-6759
IC693MDL655
3HAC029157-001/04
PC-0085-001
