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簡介：1PLC和PID簡介可編程控制器PLC作為一種新型的工業(yè)控制裝置在科研、生產(chǎn)、社會生活等諸多領(lǐng)域得到了越來越廣泛的應(yīng)用。它具備可塑性、可記憶性、可接受多種方式的輸入輸出等優(yōu)點(diǎn)除了單獨(dú)一臺的控制之外更可進(jìn)行多臺的連接控制功能強(qiáng)大易于達(dá)成整體自動化的目標(biāo)尤其是具有可更改性可重復(fù)使用非常值得推廣因此已廣受自動控制界的歡迎。PLC作為一種很有特色和發(fā)展前途的控制設(shè)備目前主要用于有大量開關(guān)量和少數(shù)模擬量的控制系統(tǒng)中。在工業(yè)生產(chǎn)過程控制中模擬量的PID比例、積分、微分調(diào)節(jié)是常見的一種控制方式這是由于PID調(diào)節(jié)不需要求出控制系統(tǒng)的數(shù)學(xué)模型。同時PID調(diào)節(jié)器又具有典型的結(jié)構(gòu)可以根據(jù)被控對象的具體情況采用PID的變種有較強(qiáng)的靈活性和適用性。一般中小型PLC控制系統(tǒng)只對一路或幾路模擬量進(jìn)行閉環(huán)控制硬件上只需配備AD及DA轉(zhuǎn)換模塊軟件可購買相應(yīng)廠家提供的PID編程功能模塊只需設(shè)定好PID參數(shù)運(yùn)行PID控制指令就能準(zhǔn)確控制回路的輸出值。2問題的提出及實(shí)驗(yàn)方案近零的水平溫控系統(tǒng)是典型的工業(yè)控制對象被廣泛應(yīng)用于工業(yè)生產(chǎn)領(lǐng)域中的各個行業(yè)甚至在日常生活中溫控系統(tǒng)也十分常見。溫控系統(tǒng)控制方法的優(yōu)劣、運(yùn)行效果的好壞直接影響到產(chǎn)品的質(zhì)量、能源的消耗以及設(shè)備的生產(chǎn)效率。溫控系統(tǒng)的被控對象往往是比較復(fù)雜的具有大慣性、純后、參數(shù)時變等特征。本文以AB系列PLCMICROLOGIX1500和模擬量輸入輸出模塊1771IFE、1771OFE作為溫控系統(tǒng)的主要元件驅(qū)動加熱元件以達(dá)到我們所需求的控制值。目前采用的常規(guī)PID控制在實(shí)際生產(chǎn)現(xiàn)場中受到參數(shù)整定方法繁雜的困擾參數(shù)往往整定不良、性能欠佳。針對這些問題我們采用了羅克韋爾RSTUNEPID參數(shù)協(xié)調(diào)軟件并應(yīng)用到本系統(tǒng)來調(diào)節(jié)PID參數(shù)。在PID控制器中誤差信號受控系統(tǒng)期望的溫度與實(shí)際溫度之間的差值在加到溫度控制電源驅(qū)動電路之前先分別以三種方式比例、積分和微分被放大。比例增益向誤差信號提供瞬時響應(yīng)積分增益求出誤差信號的積分并將誤差減低到接積分增益還有助于過濾掉實(shí)測溫度信號中的噪音微分增益使驅(qū)動依賴于實(shí)測溫度的變化率。在許多情況下，比例積分控制策略也可以產(chǎn)生滿足要求的結(jié)果而且通常要比完全的PID控制器更容易調(diào)整到穩(wěn)定的運(yùn)行狀態(tài)并獲得符合要求的穩(wěn)定時間。3溫控系統(tǒng)設(shè)計AB系列的PLC和模擬量輸入輸出單元MICROLOGIX1500是AB公司生產(chǎn)的一種功能強(qiáng)大的微型可編程序控制器它采用新穎的兩塊式組合結(jié)構(gòu)具有可擴(kuò)展COMPACTIO、內(nèi)置PID、實(shí)時時鐘RTC功能和兩路20KHZ高速計數(shù)器它還內(nèi)置2路模擬量微調(diào)電位器。輸入單元1771IFE是一塊智能的塊傳送模塊它將模擬量輸入信號傳送至任何具有傳送能力的ABPLC接口并將模擬量如溫度、壓力轉(zhuǎn)換成一個成比例的12位二進(jìn)制數(shù)或一個4位BCD值轉(zhuǎn)換后的值存儲在模塊的存儲器中通過塊傳送指令發(fā)送到附錄21PLCPIDPROFILEPROGRAMMABLECONTROLLERPLCISUSEDASANEWINDUSTRIALCONTROLDEVICEINSCIENTIFICRESEARCHPRODUCTIONSOCIALLIFESOONMANYDOMAINSHAVEBEENAPPLIEDMEMEITHASPLASTICITYMEMYSEXACCEPTABLEVARIOUSWAYSOFINPUTOUTPUTETCINADDITIONTOSEPARATEACONTROLBESIDESMECANUNDERTAKEMULTIPLECONNECTIONSCONTROLPOWERFULEASYTOACHIEVEOVERALLAUTOMATIONGOALSESPECIALLYWITHMEMODIFICATIONREUSABLEEXTREMELYISWTHPOPULARIZINGTHEREFEALREADYPOPULARWITHAUTOMATICCONTROLBOUNDEDWELCOMEPLCASAVERYDISTINCTIVEDEVELOPMENTPROSPECTSOFCONTROLEQUIPMENTMAINLYUSEDFSWITCHQUANTITYMINITYPLENTYOFANALOGUECONTROLSYSTEMINTHECOURSEOFINDUSTRIALPRODUCTIONPROCESSCONTROLANALOGQUANTITIESOFPIDPROPTIONINTEGRALDIFFERENTIALADJUSTMENTISCOMMONKINDOFCONTROLMODETHISISDUETOPIDADJUSTNOTDEMFTHECONTROLSYSTEMOFTHEMATHEMATICALMODELMEANWHILEPIDREGULATTHETYPICALSTRUCTURECANACCDINGTOTHESPECIFICCIRCUMSTANCESOFTHECONTROLLEDOBJECTUSINGPIDVARIETIESHASTHESTRONGFLEXIBILITYAPPLICABILITYTHESMALLMEDIUMSIZEDPLCCONTROLSYSTEMONLYTOALLTHEWAYAFEWROADSIMULATIONQUANTITYCLOSEDLOOPCONTROLHARDWAREONLYEQUIPPEDWITHADDACONVERSIONMODULETHESOFTWARECANBUYCRESPONDINGMANUFACTUREFURNISHEDPIDPROGRAMMINGFUNCTIONMODULENEEDTOSETTHEPIDPARAMETERSRUNNINGPIDCONTROLINSTRUCTIONCANACCURATELYCONTROLCIRCUITOUTPUTVALUES2PROBLEMSPRESENTEDEXPERIMENTSCHEMENEARLYZEROLEVELTEMPERATURECONTROLSYSTEMISATYPICALINDUSTRIALCONTROLOBJECTWHICHHASBEENWIDELYUSEDININDUSTRIALPRODUCTIONINTHEFIELDOFVARIOUSINDUSTRIESEVENINDAILYLIFETEMPERATURECONTROLSYSTEMISCOMMONTEMPERATURECONTROLSYSTEMCONTROLMETHODOFQUALITYOPERATIONEFFECTQUALITYDIRECTLYAFFECTTHEQUALITYOFTHEPRODUCTSENERGYCONSUMPTIONPRODUCTIONEFFICIENCYOFEQUIPMENTTHETEMPERATURECONTROLSYSTEMOFTHECONTROLLEDOBJECTISOFTENMECOMPLEXWITHBIGINERTIAPUREPARAMETERTIMEVARIANCEFEATURESTAKINGASERIESBPLCMICROLOGIX1500ANANALOGINPUTOUTPUTMODULE1771IFE1771OFEASTHEMAINCOMPONENTSOFTEMPERATURECONTROLSYSTEMDRIVERHEATINGELEMENTSINDERTOACHIEVEWHATWEDEMCOMPONENTSCURRENTLYUSESTHECONVENTIONALPIDCONTROLINPRACTICALPRODUCTIONSITEBYPARAMETERSETTINGMETHODOFMISCELLANEOUSDISTRESSPARAMETERSETTINGIMPROPERPERFMANCEOFTENPOAIMINGATTHESEPROBLEMSWEADOPTEDTHEROCKWELLRSTUNEPIDPARAMETERSCODINATIONSOFTWARE

簡介：1江西工業(yè)工程職業(yè)技術(shù)學(xué)院畢業(yè)論文題目MCGS監(jiān)控監(jiān)控PLC控制機(jī)械手控制機(jī)械手學(xué)生姓名指導(dǎo)教師院系電子計算機(jī)系專業(yè)電氣自動化級別電氣101江西工業(yè)工程職業(yè)技術(shù)學(xué)院20年月日3目錄目錄第一章緒論411課題背景412設(shè)計目的和意義413本文主要工作5第2章可編程序邏輯控制器（PLC）和機(jī)械手概述621可編程序邏輯控制器（PLC）6211PLC的結(jié)構(gòu)6212PLC的發(fā)展歷程7213PLC的硬件8214PLC的主要特點(diǎn)9215FX2N系列PLC介紹1022機(jī)械手11221機(jī)械手概述11222機(jī)械手的工作原理11223機(jī)械手的發(fā)展趨勢12第三章系統(tǒng)設(shè)計1331系統(tǒng)方案分析設(shè)計13311控制要求13312方案設(shè)計1332硬件設(shè)計15321輸入輸出端子地址分配15322PLC接線圖1533系統(tǒng)程序設(shè)計16331常用編程方法介紹16332流程圖17333梯形圖1734MCGS組態(tài)軟件21341MCGS組態(tài)軟件結(jié)構(gòu)21343工程的建立和變量的定義24344動畫連接27345調(diào)試31第四章系統(tǒng)的調(diào)試及設(shè)計總結(jié)3241系統(tǒng)調(diào)試32結(jié)論33參考文獻(xiàn)34致謝35

簡介：I畢業(yè)設(shè)計論文PLC控制的變頻器多級調(diào)速M(fèi)CGS組態(tài)畫面設(shè)計院（系）電子與信息工程學(xué)院學(xué)生姓名XXX專業(yè)班級09應(yīng)用電子技術(shù)2班學(xué)號2009108246指導(dǎo)教師2012年06月01日III目錄1緒論111PLC和變頻器控制交流電機(jī)的調(diào)速的發(fā)展與現(xiàn)狀112PLC和變頻器控制交流調(diào)速的目的22變頻器控制方式的選擇321PROFIBUS的通訊原理322變頻器的選擇33變頻器與可編程控制器431變頻器原理介紹432交流電機(jī)的運(yùn)行理論433可編程控制器54系統(tǒng)的設(shè)計641系統(tǒng)設(shè)計原理和方法642PLC程序設(shè)計6

簡介：1前言機(jī)床的價值從幾萬元到幾十萬元不等，一般都是在關(guān)鍵工序的關(guān)鍵設(shè)備，一旦故障停機(jī)，采用淘汰購新產(chǎn)品價值太高，一般采用維修手段進(jìn)行維修，使其恢復(fù)功能，所以維修程序、方式、手段越來越引起人們的注意。此次根據(jù)現(xiàn)有條件，選用一臺嚴(yán)重?fù)p壞的6140車床作為對象進(jìn)行維修，內(nèi)容包括原電路的解讀，新電路的設(shè)計，購買新元件，通過調(diào)試維修過程時機(jī)床可以正常使用，同時，使用組態(tài)軟件進(jìn)行模擬仿真，使其動作過程呈現(xiàn)在人們面前。在文章最后，提出了現(xiàn)有車床現(xiàn)代化改造方案，包括新控制上才可編程控制器，主軸采用交流變頻器，使控制更加趨于現(xiàn)代化控制方法。希青有限公司的6140車床多數(shù)為臥式車床，使用繼電器和接觸器，這些傳統(tǒng)的電氣結(jié)構(gòu)會導(dǎo)致部分車床因?yàn)樵匣蛘呔€路老化，設(shè)備出現(xiàn)故障，無法運(yùn)行，這次的任務(wù)就是對其中一部電氣系統(tǒng)控制完全損壞的機(jī)床進(jìn)行維修，使其可以正常運(yùn)行的情況下，但是傳統(tǒng)的車床加工精確度不高，加工方式單一，所以在原有6140車床基礎(chǔ)上進(jìn)行改造。在原有的機(jī)床上對其進(jìn)行PLC改造，提出PLC對其電氣部分的控制方法設(shè)計方案，并進(jìn)行軟件模擬，使6140車床控制電路簡化，從而克服老舊模式缺點(diǎn)，使原來的車床具有一定的數(shù)控化，可以進(jìn)行精細(xì)加工，提高產(chǎn)品經(jīng)濟(jì)效益，使車床可以在以后市場中得到更加廣泛應(yīng)用。36140車床型號意義分別為6為組代號（落地及臥室車床組）；1為系代號（臥式車床）；40為主參數(shù)折算值。126140車床的運(yùn)動分析6140車床的運(yùn)動主要分為主軸電路的轉(zhuǎn)動，進(jìn)擊運(yùn)動，輔助運(yùn)動三部分。121主運(yùn)動主軸主要是電機(jī)轉(zhuǎn)動帶動傳送帶，通過齒輪變速變化，使其獲得動力（1）電機(jī)采用三相籠式異步電動機(jī)啟動。（2）調(diào)速通過機(jī)械部分的變速箱實(shí)現(xiàn)。（3）啟動方式為直接啟動。122進(jìn)擊運(yùn)動進(jìn)擊運(yùn)動是通過快速進(jìn)擊電機(jī)，輔助內(nèi)部齒輪傳遞方式改變，使其可以實(shí)現(xiàn)4個方向上的快速移動（1）電機(jī)采用三相籠式異步電動機(jī)啟動。（2）速度固定，方向通過操作桿搖動，改變內(nèi)部齒輪咬合實(shí)現(xiàn)。（3）由點(diǎn)動開關(guān)來實(shí)現(xiàn)快速操作。（4）手動操作，可以進(jìn)行固定值的加工。123輔助運(yùn)動輔助運(yùn)動多數(shù)為手動操作完成，主要是加工時候根據(jù)需要進(jìn)行選擇（1）刀架轉(zhuǎn)動。（2）物件夾緊和放松。（3）鉆孔進(jìn)給。（4）加工冷卻（與主電機(jī)為順序啟動關(guān)系）由轉(zhuǎn)換開關(guān)控制。

簡介：外文翻譯（原文）1PLANTMODELGENERATIONFPLCSIMULATIONHYEONGTAEPARKABSTRACTTHISPAPERREPTSANAUTOMATEDPROCEDUREFCONSTRUCTINGAPLANTMODELFPLCSIMULATIONSINCEPLCPROGRAMSCONTAINONLYTHECONTROLLOGICWITHOUTINFMATIONONTHEPLANTMODELITISNECESSARYTOBUILDTHECRESPONDINGPLANTMODELTOPERFMTHESIMULATIONCONVENTIONALLYAPLANTMODELFPLCSIMULATIONHASBEENCONSTRUCTEDMANUALLYWHICHREQUIRESMUCHEFFTINDEPTHKNOWLEDGEOFTHESIMULATIONASAREMEDYFTHISPROBLEMWEPROPOSEANAUTOMATEDPROCEDUREFGENERATINGAPLANTMODELFROMTHESYMBOLTABLEOFAPLCPROGRAMTODOSOWEPROPOSEANAMINGRULEFPLCSYMBOLSSOTHATTHESYMBOLNAMESINCLUDESUFFICIENTINFMATIONONTHEPLANTMODELBYANALYSINGSUCHSYMBOLNAMESWEEXTRACTAPLANTMODELAUTOMATICALLYTHEPROPOSEDMETHODOLOGYHASBEENIMPLEMENTEDTESTRUNSPERFMEDKEYWDSAGILEMANUFACTURINGCADCAMCAPPSIMULATION1INTRODUCTIONTOSURVIVEPROSPERINTHEMODERNMANUFACTURINGERAMANUFACTURERSNEEDTOCONTINUOUSLYIMPROVETHEIRPRODUCTSASWELLASTHEIRPRODUCTIONSYSTEMSAMODERNMANUFACTURINGLINEISAHIGHLYINTEGRATEDSYSTEMCOMPOSEDOFAUTOMATEDWKSTATIONSSUCHASROBOTSWITHTOOLCHANGINGCAPABILITIESAHARDWAREHLINGSYSTEMSTAGESYSTEMACOMPUTERCONTROLSYSTEMTHATCONTROLSTHEOPERATIONSOFTHEENTIRESYSTEMSINCETHEIMPLEMENTATIONOFAMANUFACTURINGLINEREQUIRESHEAVYINVESTMENTPROPERVERIFICATIONOFALINE’SOPERATIONALSTATUSSHOULDBEPERFMEDTOENSURETHATTHEHIGHLYAUTOMATEDMANUFACTURINGSYSTEMWILLSUCCESSFULLYACHIEVETHEINTENDEDBENEFITSSIMULATIONTECHNOLOGYISCONSIDEREDTOBEANESSENTIALTOOLINTHEDESIGNANALYSISOFCOMPLEXSYSTEMSTHATCANNOTBEEASILYDESCRIBEDBYANALYTICALMATHEMATICALMODELSSIMULATIONISUSEFULFCALCULATINGUTILISATIONSTATISTICSFINDINGBOTTLENECKSPOINTINGOUTSCHEDULINGERRSEVENFCREATINGMANUFACTURINGSCHEDULESTRADITIONALLYVARIOUSSIMULATIONLANGUAGESINCLUDINGARENAAUTOMODHAVEBEENUSEDFTHESIMULATIONOFMANUFACTURINGSYSTEMS外文翻譯（原文）3PRODUCTIONSYSTEMSTYPICALLYCONSISTOFSIMULTANEOUSLYOPERATINGMACHINESWHICHARECONTROLLEDBYPLCSCURRENTLYTHEMOSTSUITABLEWIDELYEMPLOYEDINDUSTRIALCONTROLTECHNOLOGYAPLCEMULATESTHEBEHAVIOUROFANELECTRICLADDERDIAGRAMASTHEYARESEQUENTIALMACHINESTOEMULATETHEWKINGSOFPARALLELCIRCUITSTHATRESPONDINSTANTANEOUSLYPLCSUSEANINPUTOUTPUTSYMBOLTABLEASCANNINGCYCLEWHENAPROGRAMISBEINGRUNINAPLCITISCONTINUOUSLYEXECUTINGASCANNINGCYCLETHEPROGRAMSCANSOLVESTHEBOOLEANLOGICRELATEDTOTHEINFMATIONINTHEINPUTTABLEWITHTHATINTHEOUTPUTINTERNALRELAYTABLESINADDITIONTHEINFMATIONINTHEOUTPUTINTERNALRELAYTABLESISUPDATEDDURINGTHEPROGRAMSCANINAPLCTHISBOOLEANLOGICISTYPICALLYREPRESENTEDUSINGAGRAPHICALLANGUAGEKNOWNASALADDERDIAGRAMIEC2003SINCETHEABSTRACTIONLEVELSOFCONVENTIONALSIMULATSPLCPROGRAMSAREQUITEDIFFERENTTHECONTROLLOGICOFCONVENTIONALSIMULATSCANNOTBEREUSEDFTHEGENERATIONOFPLCPROGRAMSUSUALLYELECTRICALENGINEERSMANUALLYWRITEPLCPROGRAMSBYREFERRINGTOTHEROUGHCONTROLLOGICOFCONVENTIONALSIMULATSASSHOWN

簡介：附錄附錄1外文原文DEVELOPMENTOFAMONITINGCONTROLPLATFMFPLCBASEDAPPLICATIONSSDANAASAGAHYROONAELRAYESARALALIRALAYDI1INTRODUCTIONTHERECENTGROWTHOFWKSTECHNOLOGYSPECIALLYTHEWIDESPREADOFTHEINTERHAVEPROMOTEDTHEDEVELOPMENTOFDISTRIBUTEDMEASUREMENTSYSTEMSFAVARIETYOFINDUSTRIALAPPLICATIONSTHESEDISTRIBUTEDMEASUREMENTSYSTEMSCANBEUSEDINTHEMONITINGCONTROLOFVARIOUSINSTRUMENTSINTHEWK12APROGRAMMABLELOGICCONTROLLERPLCISMICROPROCESSBASEDCONTROLSYSTEMTHATCANBEPROGRAMMEDTOSENSEACTIVATECONTROLINDUSTRIALEQUIPMENTTHEREFEINCPATESANUMBEROFINPUTOUTPUTTERMINALSFINTERFACINGTOANINDUSTRIALPROCESSACONTROLPROGRAMSTEDINTHEPLCMEMYDETERMINESTHERELATIONSHIPBETWEENTHEINPUTSOUTPUTSOFTHEPLCPLCSAREINTELLIGENTAUTOMATIONSTATIONSTHATPOSSESSHIGHLYUSEFULDESIRABLEFEATURESSUCHAS3ROBUSTNESSHIGHDEGREEOFSCALABILITYMODERNPLCFAMILIESHAVEAWIDESPECTRUMOFCPUTYPESTHATALLOWSEASYSCALABILITYINFUNCTIONALITYPERFMANCEEXTENSIBILITYTHEMODULARDESIGNOFPLCSENABLESTHEEXTENSIONWITHAWIDERANGEOFDIGITALANALOGIOMODULESALSOVARIOUSINTEGRATEDTECHNOLOGYMODULESAREAVAILABLEFVARIOUSAPPLICATIONAREASSOPHISTICATEDCOMMUNICATIONCAPABILITIESMODERNPLCSHAVECOMMUNICATIONPTSTHATPROVIDEFCENTRALIZEDDISTRIBUTEDCONNECTIVITYPOWERFULDEVELOPMENTENVIRONMENTMODERNPLCFAMILIESCOMEWITHACROSSDEVELOPMENTENVIRONMENTTHATSUPPTDIFFERENTLANGUAGESFPROGRAMMABILITYALLOWSSEMIGRAPHICALHARDWARECONFIGURATIONOFFERSTRONGDEBUGGINGMECHANISMSREMOTEACCESSTOCONTROLMONITVARIOUSDEVICESINANINDUSTRIALSETTINGISOFVALUETOENGINEERSAUTOMATIONFACILITIESCURRENTIMPLEMENTATIONSOFREMOTEPLCMONITCONTROLUSEDEDICATEDPCSWEBSERVERSCONNECTEDTOTHEPLCFIG1ILLUSTRATESACOMMONARCHITECTUREUSEDININDUSTRYASSHOWNPLCSARECONNECTEDTOTHEWKTHROUGHACOMPUTERTHEPLCSYSTEMISUSUALLYINTERFACEDTOTHISCOMPUTERUSINGTHESERIALPTPROFIBUSTHESETYPESOFSYSTEMSAREDISADVANTAGEDBYTHEDEDICATEDUSEOFAPCTOACCESSTHEPLCSYSTEMTHEARCHITECTUREALSODOESNOTMAKEUSEOFTHEADVENTSSTRIDESMADEINAREASSUCHASTELECOMMUNICATIONSWEBTECHNOLOGYFIG2SYSTEMARCHITECTURETHESYSTEMCONSISTSOFTHEFOLLOWINGCOMPONENTSSIMATICS7200300PLCSYSTEMSCOMMUNICATIONPROCESSSCPSEACHCPHASANINTEGRATEDCOMMUNICATIONINTERFACEHARDWARESOFTWARETHATALLOWSTHEPLCTOCOMMUNICATEINALANWANVIAAGSMWKCLIENTSADMINISTRATARECONNECTEDTOTHEPROCESSVIATHEWKWIRELESSLYPRIVILEGESCANBESETRESETBYADMINISTRATSTOALLOWFTOLIMITTHEVARIOUSCLIENTSOPTIONSADATABASESERVERCONNECTEDTOTHEPROCESSVIATHEWKFDATALOGGINGEVENTRECDINGAVARIETYOFWKOPTIONSINCLUDINGGSMBASEDACCESSIBILITYTHEPLCSYSTEMETHERMODULEISACOMMUNICATIONPROCESSFTHES7FAMILYUSEDTOCONNECTTHEPLCTOTHEWKANADDITIONALCOMMUNICATIONPROCESSISUSEDTOALLOWCOMMUNICATIONBETWEENTHEPLCTHEGSMMODEMOVERTHESERIALPTRS232INTHEPROPOSEDIMPLEMENTATIONTHEPLCSYSTEMREPTSREMOTELYTHESTATUSOFTHEPROCESSTOTHEDATABASESERVERTHEDATABASESERVERRECDSTHESTATUSOFTHEPLCINTIMEBASEDTABLESPERFMSANYREQUIREDDATAANALYSISTHESYSTEMALSORECEIVESEXECUTESCOMMANDSFROMADMINISTRATSCLIENTSTOCONTROLTHEPROCESSGSMCONNECTIVITYISALSOIMPLEMENTEDTOALLOWUSERSWITHDIFFERENTPRIVILEGESTOACCESSTHESTATUSOFTHEMANDATYFUNCTIONSOFTHEPLCALLOWTHEMTOCONTROLTHESEFUNCTIONSETHERGSMCONNECTIVITYOFTHEPLCSISIMPLEMENTEDUSINGTHECP343THECP340COMMUNICATIONPROCESSS7THESYSTEMSOFTWAREWASIMPLEMENTEDMAINLYUSINGSIMATICMANAGER7JAVATHESIMATICMANAGERENVIRONMENTISUSEDFCOMMUNICATIONWITHTHEPLCSYSTEMTHEPROPOSEDARCHITECTUREALLOWSFPROGRAMMINGREPROGRAMMINGCONFIGURINGTHESYSTEMREMOTELYTHEJAVAAPPLICATIONISDEVELOPEDUSINGTHES7APISS7APPLICATIONPROGRAMMINGINTERFACESTOESTABLISHTHECOMMUNICATIONBETWEENTHEDATABASESERVERPLCSTATION8FEXAMPLEUSINGTHESEAPISWECANINSTANTIATEOBJECTSTHATWILLCONNECTTHEDATABASESERVERTOTHEPLCSTATIONBYSPECIFYINGTHEIPADDRESSTHES7ADDRESSOFTHECPUCONTAINEDINTHEPLCUNIT

簡介：外文文獻(xiàn)譯文設(shè)計論文題目S7200系列PLC實(shí)現(xiàn)電梯模型控制專業(yè)與班級學(xué)生姓名指導(dǎo)教師年月日2LISTIL1THETECHNIQUEOFPLCUSINGPROGRAMMABLELANGUAGETOCONTROLLARGESCALEINTEGRATEDCIRCUITHASBEENWIDELYUSEDININDUSTRY2BECAUSEOFSAFETYCRITICALSOFTWARECANCAUSESERIOUSDAMAGETOLIFEPROPERTYVERIFICATIONOFSAFETYCRITICALSOFTWAREHASBECOMEANINDISPENSABLESTEPREQUIREDTOASSURESOFTWAREQUALITYTHEPRESENTVERIFYINGMETHODFTHEPLCISSTILLSTUCKBYSIMULATIONTESTINGHOWEVERTHEYCANNOTCOVERALLPOSSIBLECASESESPECIALWHETHERTHEDESIGNMODELOFPLCTOMEETTHEDEMTHEREFETHEMODELCHECKINGTECHNOLOGYISINTRODUCEDINTOTHEFIELDOFPLCTOGIVETHEETICALANALYSISOFPLCDESIGNBECOMESIMPTANTTHEPRIMARYSTEPOFPLCMODELCHECKINGISTOTHEESTABLISHMENTOFPLCMODELSUCHASESTABLISHAMODELFROMFUNCTIONTS3THEPLCMODELFOCUSESONTHEESTABLISHMENTOFTHETIMEATTRIBUTES4ITCANBEMODELEDBYTHEMETHODOFTIMEDAUTOMATA5TIMEPERIODMODELINGMETHOD6THUSSTATESPACEOFTHEMODELWILLBEDECREASEDCOMPAREDTOTIMEDAUTOMATAEITHERWAYONECHOOSEEVENTUALLYANABSTRACTMODELCANBEGIVEN7HOWTOBUILDAGOODPLCABSTRACTMODELISTHEMOSTIMPTANTISSUETOTHECHECKINGASTHEMANUALLYMODELINGISEASYTOINTRODUCEMANYERRSSOTHEESTABLISHMENTOFANINTEGRATEDMODELINGTESTINGTOOLISVERYIMPTANTTHISISONEOFTHEISSUESOFCONCERNTOTHISPAPERPLCCONTROLPROGRAMRUNSINREALTIMEOPERATINGSYSTEMMULTITASKSINGLETASKTHISPAPERISMAINLYBASEDONMULTITASKSCHEDULINGPLCSYSTEMSECTION2OFTHEARTICLEHASANINTRODUCTIONTOTHEMODELINGMETHODOFPLCSYSTEMSECTION3GIVESTHEANALYSISIMPROVEMENTOFTHISMODELASWENEEDTOREDUCETHEPROBABILITYOFPSEUDOERRSSECTIONIVDESIGNSAMODELCHECKINGTOOLPLCCHECKERTOCHECKTHEESTABLISHEDMODELINCLUDINGINTRODUCETHEWAYOFCONVERTINGPLCPROGRAMINTOSPINSINPUTLANGUAGEPROMELACODEFINALLYACLASSICALPLCEXAMPLEISAPPLIEDTOCHECKACRITICALCOUNTEREXAMPLEISFOUNDBYTHEPLCCHECKER2PLCMODELINGTHEREARETHREESTEPSOFMODELCHECKINGMODELINGPROPERTYDEIONVERIFICATIONTHEMOSTIMPTANTISHOWTOBUILDTHESYSTEMMODELINTHESYSTEMPLCCONTROLLERISNOTISOLATEDBUTHASINTERACTIONWITHITSWKINGENVIRONMENTDRIVERHUMAN8THEREFETHESEFACTSSHOULDALSOBEMODELINGTHEENVIRONMENTHUMANTHEPLCCONTROLLERISINDEPENDENTCONCURRENTWITHEACHOTHERINLOGICALSOTHEMODELCHECKERSPIN’SINPUTLANGUAGEPROMELAISFOCUSEDONDESCRIBINGTHECONCURRENTSOSTARTINGFROMTHISIDEAWEBUILDTHESEFACTSINTOSEVERALCONCURRENTPROCESSESTOFITTHECHECKINGFROMSPINITWILLALSOACCURATELYDESCRIBETHESYSTEMTODESCRIBECONVENIENTLYTHEYWILLBECALLEDCONCURRENTENTITIESPLCCONTROLLERINTERACTSWITHTHECONCURRENTENTITIESTHROUGHTHESYMBOLSINIMAGETABLETHESYMBOLSOFPLCSYSTEMINCLUDEI

簡介：翻譯部分英文原文DESIGNIMPLEMENTATIONOFPLCBASEDMONITINGCONTROLSYSTEMFINDUCTIONMOTMARIAGIOANNIDESSENIMEMBERIEEEABSTRACTTHEIMPLEMENTATIONOFAMONITINGCONTROLSYSTEMFTHEINDUCTIONMOTBASEDONPROGRAMMABLELOGICCONTROLLERPLCTECHNOLOGYISDESCRIBEDALSOTHEIMPLEMENTATIONOFTHEHARDWARESOFTWAREFSPEEDCONTROLPROTECTIONWITHTHERESULTSOBTAINEDFROMTESTSONINDUCTIONMOTPERFMANCEISPROVIDEDTHEPLCCRELATESTHEOPERATIONALPARAMETERSTOTHESPEEDREQUESTEDBYTHEUSERMONITSTHESYSTEMDURINGNMALOPERATIONUNDERTRIPCONDITIONSTESTSOFTHEINDUCTIONMOTSYSTEMDRIVENBYINVERTERCONTROLLEDBYPLCPROVEAHIGHERACCURACYINSPEEDREGULATIONASCOMPAREDTOACONVENTIONALVFCONTROLSYSTEMTHEEFFICIENCYOFPLCCONTROLISINCREASEDATHIGHSPEEDSUPTO95OFTHESYNCHRONOUSSPEEDTHUSPLCPROVESTHEMSELVESASAVERYVERSATILEEFFECTIVETOOLININDUSTRIALCONTROLOFELECTRICDRIVESINDEXTERMSCOMPUTERCONTROLLEDSYSTEMSCOMPUTERIZEDMONITINGELECTRICDRIVESINDUCTIONMOTSMOTIONCONTROLPROGRAMMABLELOGICCONTROLLERSPLCSVARIABLEFREQUENCYDRIVESVOLTAGECONTROLIINTRODUCTIONSINCETECHNOLOGYFMOTIONCONTROLOFELECTRICDRIVESBECAMEAVAILABLETHEUSEOFPROGRAMMABLELOGICCONTROLLERSPLCSWITHPOWERELECTRONICSINELECTRICMACHINESAPPLICATIONSHASBEENINTRODUCEDINTHEMANUFACTURINGAUTOMATION12THISUSEOFFERSADVANTAGESSUCHASLOWERVOLTAGEWHENTURNEDONTHEABILITYTOCONTROLMOTSOTHEREQUIPMENTWITHAVIRTUALLYUNITYPOWERFACT3MANYFACTIESUSEPLCSINAUTOMATIONPROCESSESTODIMINISHPRODUCTIONCOSTTOINCREASEQUALITYRELIABILITY4–9OTHERAPPLICATIONSINCLUDEMACHINETOOLSWITHIMPROVEDPRECISIONCOMPUTERIZEDNUMERICALCONTROLCNCDUETOTHEUSEOFPLCS10TOOBTAINACCURATEINDUSTRIALELECTRICDRIVESYSTEMSITISNECESSARYTOUSEPLCSINTERFACEDWITHPOWERCONVERTERSPERSONALCOMPUTERSOTHERELECTRICEQUIPMENT11–13NEVERTHELESSTHISMAKESTHEEQUIPMENTMESOPHISTICATEDCOMPLEXEXPENSIVE1415FEWPAPERSWEREPUBLISHEDCONCERNINGDCMACHINESCONTROLLEDBYPLCSTHEYREPTBOTHTHEIMPLEMENTATIONOFTHEFUZZYMETHODFSPEEDCONTROLOFADCPROGRAMISENTEREDINTOTHEPLCMEMYINOURAPPLICATIONITCONTROLSTHROUGHANALOGDIGITALINPUTSOUTPUTSTHEVARYINGLOADCONSTANTSPEEDOPERATIONOFANINDUCTIONMOTALSOTHEPLCCONTINUOUSLYMONITSTHEINPUTSACTIVATESTHEOUTPUTSACCDINGTOTHECONTROLPROGRAMTHISPLCSYSTEMISOFMODULARTYPECOMPOSEDOFSPECIFICHARDWAREBUILDINGBLOCKSMODULESWHICHPLUGDIRECTLYINTOAPROPRIETARYBUSACENTRALPROCESSUNITCPUAPOWERSUPPLYUNITINPUTOUTPUTMODULESIOAPROGRAMTERMINALSUCHAMODULARAPPROACHHASTHEADVANTAGETHATTHEINITIALCONFIGURATIONCANBEEXPEDFOTHERFUTUREAPPLICATIONSSUCHASMULTIMACHINESYSTEMSCOMPUTERLINKINGIIICONTROLSYSTEMOFINDUCTIONMOTINFIG2THEBLOCKDIAGRAMOFTHEEXPERIMENTALSYSTEMISILLUSTRATEDTHEFOLLOWINGCONFIGURATIONSCANBEOBTAINEDFROMTHISSETUPAACLOSEDLOOPCONTROLSYSTEMFCONSTANTSPEEDOPERATIONCONFIGUREDWITHSPEEDFEEDBACKLOADCURRENTFEEDBACKTHEINDUCTIONMOTDRIVESAVARIABLELOADISFEDBYANINVERTERTHEPLCCONTROLSTHEINVERTERVFOUTPUTBANOPENLOOPCONTROLSYSTEMFVARIABLESPEEDOPERATIONTHEINDUCTIONMOTDRIVESAVARIABLELOADISFEDBYANINVERTERINCONSTANTVFCONTROLMODETHEPLCISINACTIVATEDCTHESTARDVARIABLESPEEDOPERATIONTHEINDUCTIONMOTDRIVESAVARIABLELOADISFEDBYACONSTANTVOLTAGECONSTANTFREQUENCYSTARDTHREEPHASESUPPLY

簡介：基于基于PLCPLC的皮帶集中控制系統(tǒng)設(shè)計的皮帶集中控制系統(tǒng)設(shè)計摘要煤礦的運(yùn)輸系統(tǒng)對保證礦井正常生產(chǎn)起著非常重要的作用。為了保證煤礦運(yùn)輸系統(tǒng)可靠安全運(yùn)行，對帶式輸送機(jī)進(jìn)行集中監(jiān)視和控制很必要。本文以新疆哈密煤礦主斜井及地面膠帶輸送機(jī)為背景，設(shè)計出了以PLC技術(shù)為核心的集中控制系統(tǒng)，提高了運(yùn)輸系統(tǒng)的監(jiān)測和控制水平。文中首先介紹了本次設(shè)計的背景，然后設(shè)計了膠帶輸送機(jī)集中控制系統(tǒng)的結(jié)構(gòu)和應(yīng)具有的控制功能，參數(shù)的檢測和故障保護(hù)裝置，確定了各故障檢測傳感器的類型及安裝位置。在此基礎(chǔ)上采用SIEMENS的S7300系列PLC對系統(tǒng)進(jìn)行硬件和軟件設(shè)計，其中包括PLC的模塊配置及外部連線，梯形圖程序設(shè)計。最后提出PLC控制系統(tǒng)的主要干擾源，并設(shè)計了抗干擾的措施。關(guān)鍵詞膠帶輸送機(jī)；S7300；集中控制系統(tǒng)目錄1緒論111概述112膠帶輸送機(jī)集中控制系統(tǒng)1121膠帶輸送機(jī)集中控制系統(tǒng)的重要性1122集中控制系統(tǒng)的發(fā)展及存在的問題213本課題研究的主要內(nèi)容22膠帶機(jī)集中控制系統(tǒng)的總體設(shè)計421課題背景介紹422膠帶輸送機(jī)集中控制系統(tǒng)的功能設(shè)計523膠帶輸送機(jī)集中控制系統(tǒng)結(jié)構(gòu)設(shè)計624膠帶輸送機(jī)集中控制系統(tǒng)設(shè)備構(gòu)成7241膠帶輸送機(jī)7242參數(shù)檢測及故障保護(hù)裝置8243PLC簡述14244人機(jī)界面HMI173膠帶輸送機(jī)集控系統(tǒng)硬件設(shè)計1931SIMATICS7300PLC簡介19311SIMATICS7300PLC簡介19312模塊安裝2032集控系統(tǒng)PLC的設(shè)計21321CPU的選擇21322數(shù)字量模塊選擇23323模擬量模塊選擇25324電源模塊的選擇2633西門子ET200M與PROFIBUSDP總線284膠帶集中控制系統(tǒng)軟件設(shè)計3041集中控制的流程圖3042系統(tǒng)軟件實(shí)現(xiàn)31421控制方式選擇31422模擬量的處理32

簡介：畢業(yè)論文畢業(yè)論文題目基于基于PLCPLC工業(yè)污水處理控制系統(tǒng)的設(shè)計工業(yè)污水處理控制系統(tǒng)的設(shè)計學(xué)生姓名學(xué)號學(xué)院信息與控制學(xué)院專業(yè)電氣工程及其自動化指導(dǎo)教師目錄1緒論1南京信息工程大學(xué)信息與控制學(xué)院，江蘇南京210044摘要本文按照污水處理的工藝要求和流程結(jié)合了SBR污水處理法設(shè)計了一套基于西門子S7300系列PLC的控制方案。同時說明了本控制系統(tǒng)硬件構(gòu)成與組合方式、工作流程及設(shè)計PLC控制系統(tǒng)的原理與步驟。此系統(tǒng)的應(yīng)用可提高污水處理的質(zhì)量減少能耗使經(jīng)濟(jì)效益提高。通過STEP7提供的仿真軟件進(jìn)行調(diào)試，檢測了西門子PLC對現(xiàn)場設(shè)備的狀態(tài)采集與自動控制功能符合控制方案要求。關(guān)鍵詞污水處理；PLC；工藝流程；SBR法

簡介：1BOILERLEVELCONTROLSYSTEMBASEDONCONTROLLOGIX5550PLCABSTRACTTHISPAPERISARESEARCHDESIGNBASEDONEFPTPROCESSCONTROLDEVICEINTHEDESIGNACTUALINDUSTRYFIELDHASBEENSIMULATEDCRESPONDINGMODELINGHASBEENCARRIEDONFTHEBOILERLEVELSYSTEMTHENTHEAPPROPRIATEPIDPARAMETERHASBEENSTEDOUTCONTROLLOGIA5550PLCHASBEENUSEDTOCONTROLTHEENTIREBOILERLEVELSYSTEMATLASTACRESPONDINGCONTROLINTERFACEHASBEENESTABLISHEDTHEBOILERLEVELHASBEENUNDERASAFEACCURATECONTROLKEYWDSEFPT，PID，MODELING，BOILERLEVEL1INTRODUCTIONTHETASKOFTHEINDUSTRIALBOILERLEVELCONTROLISTOMAINTAINADYNAMICBALANCEBYCONTROLLINGTHEWATERFLOWEVAPATIONSOTHATTHEDRUMLEVELCANBEMAINTAINEDINTHETECHNOLOGICALLEVELWHICHISANECESSITYFENSURINGSAFEOPERATIONALSOONEOFTHEMAININDICATSOFTHEBOILERSNMALOPERATIONWATERLEVELWHICHISTOOHIGHWILLAFFECTTHEEFFECTOFTHESTEAMWATERSEPARATIONBUTTOOLOWITISWILLBREAKRINGCYCLEEVENCAUSEBOILEREXPLOSIONTOENSUREASAFEEFFICIENTPRODUCTIONTHEBOILERLEVELMUSTBESTRICTLYCONTROLLEDINMAINTAININGCONSTANTCHANGINGONLYACCDINGTOACERTAINRULEUSINGLOGIX5550PLCWITHANALOGYIOMODULESLAUNCHEDBYROCKWELLAUTOMATIONCOMPANYASCONTROLLERSEFPTPROCESSCONTROLEXPERIMENTALDEVICEASCONTROLOBJECTTHISSYSTEMHAVEBROUGHTTHEBOILERWATERLEVELUNDERANACCURATECONTROLINAMINIBOILERSYSTEMWITHSENSSACTUATSTHATUSEDIN3INTHEDESIGNTHEINVERTERASANACTUATDIRECTLYRECEIVESPLCANALOGYIOPTOUTPUTCONVERTERSINTOFREQUENCYOFINVERTERSOASTODRIVETHE3PHASEMOTINTHELIFTPUMPCHANGETHEINLETADJUSTTHEBOILERLEVELTOTHEDYNAMICBALANCEATLASTTHECONFIGURATIONSOFTWAREISUSEDTODESIGNMONITINGPICTURETOREALIZETHECOMPUTERTHETOUCHSCREENTOTHEBOILERLEVELLONGDISTANCETHESCENEMONITING1PUMPSTARTEDPIDCONTROLLERPRESSURETRANSMITTERTOTHECONTROLPOINTTOPROVIDETHEPRESSURESIGNALWHENTHEPRESSUREPOINTISNOTEQUALTOSETVALUEPIDCONTROLLERBYADJUSTINGTHEINVERTEROUTPUTFREQUENCYTOCHANGETHEPUMPSPEEDTOREGULATETHEPIPELINEPRESSURECONSTITUTESACLOSEDLOOPFEEDBACKCONTROLSYSTEMWATERPRESSUREREGULATSOTHATUSERSTIMELYSMALLFLUCTUATIONSINRESULTSINTHEPROCESSCONTROLSYSTEMDESIGNEDTOTAKEFULLACCOUNTOFTHEPRINCIPLEOFLOADBALANCINGTOTAKE“FIRSTINFIRSTOUT“STRATEGYOFLININGUPTHEWAYTHEIMPLEMENTATIONOFTHEROTATINGFREQUENCYTOENSURETHATTHEBASICBALANCEOFTHEWATERUSAGE1FREQUENCYCONTROLCONSTANTPRESSUREWATERSUPPLYPRINCIPLEFREQUENCYCONTROLCONSTANTPRESSUREWATERSUPPLYSYSTEMBYTHEPROGRAMMABLELOGICCONTROLLERPLCCONVERTERBUILTPIDPRESSURETRANSMITTERLOWVOLTAGE

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簡介：2015屆本科生畢業(yè)設(shè)計屆本科生畢業(yè)設(shè)計分類號分類號TP911題目題目基于基于PLC的沼氣池自動控制系統(tǒng)設(shè)計的沼氣池自動控制系統(tǒng)設(shè)計作者姓名名學(xué)號號學(xué)院院機(jī)械與電子工程學(xué)院機(jī)械與電子工程學(xué)院專業(yè)業(yè)電氣工程及其自動化電氣工程及其自動化指導(dǎo)教師姓名指導(dǎo)教師姓名指導(dǎo)教師職稱指導(dǎo)教師職稱2015年5月10日ABSTRACTTHISDESIGNISAPLCBASEDAUTOMATICMETHANECONTROLSYSTEMTHESIEMENSS7300PLCCONTROLLERISTHECEOFTHESYSTEMTHECONTROLPROGRAMISCOMPILEDBYUSINGTHESTEP7SOFTWARETHEHUMANMACHINEINTERFACEISDESIGNEDWITHTHEWINCCFLEXIBLESOFTWARETOREALIZETHEREALTIMEMONITINGOFTHESYSTEMBYINPUTTINGTHECRESPONDINGCONTROLSIGNALTHROUGHTHEHUMANMACHINEINTERFACEEACHACTUATINGMECHANISMOFTHEMETHANETANKCANBECONTROLLEDTHESYSTEMISABLETOCONVERTTHEDATAITCOLLECTEDCOMPARISONBETWEENTHEACTUALVALUESETVALUECANBEPERFMEDTOREALIZETHEINTELLIGENTCONTROLOFTHEMETHANETANKTHECONTROLLERRUNSWELLDURINGDEBUGGINGINTHELABATYTHETOUCHSCREENISEASYTOOPERATEHIGHLYRELIABLEPRACTICALMEETINGTHEREQUIREMENTOFONSITECONTROLREALIZINGTHEDESIGNTARGETKEYWDSMETHANECONTROLPROGRAMMABLECONTROLLERHUMANMACHINEINTERFACE

簡介：基于基于PLC的全自動洗衣機(jī)控制系統(tǒng)設(shè)計的全自動洗衣機(jī)控制系統(tǒng)設(shè)計摘要本文介紹了利用三菱FX2N系列PLC對全自動洗衣機(jī)控制系統(tǒng)總體控制闡述了控制方案。實(shí)現(xiàn)全自動洗衣機(jī)控制系統(tǒng)總體控制有多種，可以采用早期的模擬電路、數(shù)字電路或模數(shù)混合電路。近年來隨著科技的飛速發(fā)展，單片機(jī)、PLC的應(yīng)用不斷地走向深入，同時帶動傳統(tǒng)的控制檢測技術(shù)的不斷更新。本文采用日本三菱公司生產(chǎn)的FX2N48MR型PLC作為核心控制器進(jìn)行全自動洗衣機(jī)控制系統(tǒng)的設(shè)計，并且設(shè)計出了系統(tǒng)結(jié)構(gòu)圖、程序指令、梯形圖以及輸入輸出端子的分配方案。同時根據(jù)全自動洗衣機(jī)控制系統(tǒng)總體控制要求和特點(diǎn)確定PLC的輸入輸出分配并進(jìn)行現(xiàn)場調(diào)試關(guān)鍵字PLC全自動洗衣機(jī)控制系統(tǒng)PLC程序設(shè)計目錄目錄1引言22全自動洗衣機(jī)控制系統(tǒng)總體控制方案確定321總體控制方案確定3211控制系統(tǒng)的比較3222洗衣機(jī)的PLC控制系統(tǒng)概述33全自動洗衣機(jī)的基本結(jié)構(gòu)531全自動洗衣機(jī)的原理和構(gòu)造532洗滌脫水系統(tǒng)733排水和進(jìn)水系統(tǒng)734電動機(jī)及傳動系統(tǒng)84電氣控制系統(tǒng)941控制系統(tǒng)結(jié)構(gòu)942控制系統(tǒng)原理943檢測電路系統(tǒng)105主要器件的選擇1151電動機(jī)的選擇1152傳感器的選擇1153可編程控制器外部設(shè)計126軟件設(shè)計1461系統(tǒng)的順序功能圖設(shè)計1462全自動洗衣機(jī)的控制要求1463控制系統(tǒng)順序功能圖1564控制系統(tǒng)的梯形圖設(shè)計1665程序語句表18設(shè)計體會187結(jié)束語18致謝19參考文獻(xiàn)20

簡介：本科畢業(yè)設(shè)計本科畢業(yè)設(shè)計（外文翻譯）（外文翻譯）題目_基于PLC鍋爐溫度控制_系統(tǒng)姓名專業(yè)自動化學(xué)號指導(dǎo)教師小初、宋體、加粗小三、宋體、15倍行距小三、宋體、15倍行距題目過長分兩行，所填內(nèi)容居中外文翻譯外文翻譯原文原文基于PLC的鍋爐溫度控制系統(tǒng)的研究摘要摘要從鍋爐的發(fā)展情況，PLC選型系統(tǒng)軟硬件設(shè)計，上下位機(jī)通信，組態(tài)程序開發(fā)設(shè)計等幾個方面進(jìn)行介紹。通過PLC實(shí)現(xiàn)的溫度控制系統(tǒng)具有調(diào)試簡潔、價格低廉、易于維修等優(yōu)勢，并且容易拓展到相應(yīng)的工控領(lǐng)域，移植性較好對工控發(fā)展具有重要的意義。關(guān)鍵詞關(guān)鍵詞PLC傳感器；溫度；自動控制隨著經(jīng)濟(jì)的不斷發(fā)展，環(huán)境問題越發(fā)突出。鍋爐作為供熱系統(tǒng)中最重要的能源轉(zhuǎn)換裝置能源消耗巨大，每年全國鍋爐燃燒消耗的能源占總產(chǎn)13以上。目前，國內(nèi)大部分城市供熱系統(tǒng)中運(yùn)行的鍋爐設(shè)備陳舊老化基本依靠人工操作，自動化水平低下，安全性能極差，燃燒效率不高，空氣污染極為嚴(yán)重。因此，為鍋爐配置自動化溫度控制系統(tǒng)在當(dāng)今環(huán)境污染日益嚴(yán)重的情況下就顯得極為重要。1基于PLC的鍋爐溫度控制的介紹本系統(tǒng)是基于PLC的鍋爐溫度控制，通過鍋爐內(nèi)部傳感器對溫度、流量等參數(shù)的反饋來對系統(tǒng)溫度進(jìn)行調(diào)控，實(shí)現(xiàn)鍋爐溫度的自動控制。PLC可編程控制器是一種將繼電器控制器和計算機(jī)結(jié)合起來，通過安裝程序CPU中央處理單元為核心與IO設(shè)備相連接，使用在工控領(lǐng)域的計算機(jī)其構(gòu)成與普通計算機(jī)略有不同，主要是由CPU、存儲單元、IO接口電路、電源等基礎(chǔ)部分外加擴(kuò)展部分、編程器、外部設(shè)備等方面組成。PLC可編程控制器既能替代普通的繼電器，又具有多種擴(kuò)展功能，如AD模塊等。因此，PLC的運(yùn)用為鍋爐的自動控制提供了新的解決辦法使一些先進(jìn)的控制方法得以應(yīng)用。使用PLC可編程控制器對鍋爐系統(tǒng)進(jìn)行改造實(shí)現(xiàn)對溫度的自動控制一方面可以提高燃燒效率，減少燃料的使用量和煙氣中有害氣體的排放減少了空氣