自動(dòng)化專(zhuān)業(yè)本科畢業(yè)設(shè)計(jì)英文翻譯

自動(dòng)化專(zhuān)業(yè)本科畢業(yè)設(shè)計(jì)英文翻譯學(xué)院（部）：專(zhuān)業(yè)班級(jí)：學(xué)生姓名：指導(dǎo)老師：年月日安徽理工大學(xué)畢業(yè)設(shè)計(jì)FOREIGNLITERATUREAtpresent,themaincontrolwayinautomationfieldarerelaycontrol,microcomputercontrolandPLCcontrol.Comparedwiththerelaycontrolsystemandthemicrocomputercontrolsystem,thePLCcontrolsystemhasaseriesofadvantages,suchaslittleworkloadofdesigning,installing,wiringanddebugging,shortcycleofdevelopmentofworkingenvironmentandconvenientmaintenance.Meanwhile,therelaycontrolsystemhasalreadybeenfewusedonthemachinecontrolsystemisinferiorinabilityofanti-interference,highinrequirementofworkingenvironmentandlongindesignanddevelopingcycleofthecontrolsystem.Soitsapplicationhasbeingondefiningtrendintheautomationcontrolfieldbyyear.Theelectricalcontrolsystemofz-3040Radialarmdrillhasmanydefectssuchascomplexcircuit,highfailurerate,largemaintenanceworkload,poorreliabilityandflexibility.Thispaperintroducesthez-3040RadialarmdrillrelaycontactanalogcontrolsystemreformationwithPLCtoguaranteetherapidity,accuracyandrationalityofelectriccontrolsystem.Itsatisfiedrealproductiondemandandenhancetheeconomicbenefit.Theoriginalwasintroducedinitialcontrollerofprogrammabledistinguishingfeatureandperformance.Analysesonz-3040’sRadialarmdrilltechniquepropertyandtheworkcycledistancetravelledbyastreamofwaterbase,expoundedtheinitialcontrollerofapplicationES’ssetprogrammablecarryingonthetechnologicaltransformationsystemdesigntosuch,andfinishcomeoutthecontrolproceduretrapeziumpicture.WhatisaPLCcontrolsystem?Sincethe1960stheUnitedStatestolaunchprogrammablelogiccontroller(ProgrammableLogicController,PLC)toreplaceconventionalcontroldevicessincetherelay,PLChasbeenrapiddevelopmentinvariouspartsoftheworldhavebeenwidelyused.Atthesametime,PLC'sfunctionalsoimproved.Withcomputertechnology,signalprocessingtechnology,controltechnologynetworktechnologydevelopmentanduserdemandforcontinuousimprovement,PLCindealingwiththevolumeswitchonthebasisoftheincreaseintheamountofanalogprocessingandmotioncontrolfunctions.Today,thePLCisnolongerconfinedtothelogiccontrol,motioncontrol,processcontrolandotherfieldhasalsoplayedaveryimportantrole.Discretecontrolofthesystemasthepreferredproduct,PLCinthetwentiethcenturytothe1990sand1980s,haveachievedrapiddevelopmentintheworldofPLCtomaintain1安徽理工大學(xué)畢業(yè)設(shè)計(jì)anannualgrowthrateof20%to30%.WiththefactoryautomationandcontinuousimprovementinthePLCandmarketbaseexpansioninrecentyearsinthePLCindustryslowdowninthegrowthrateofdevelopedcountries.However,ChinaandotherdevelopingcountriesinthePLC'sgrowingveryrapidly.Comprehensiveinformation,in2004globalsalesofthePLCforabout10,000,000,000U.S.dollars,inthefieldofautomationplaysaveryimportantposition.PLCtouchbytheimitationoftheoriginalrelaycontrolprincipledevelopedinthe1970s,onlythePLClogiccontrolswitch,firstofallapplicationsintheautomotivemanufacturingindustry.Totheimplementationofitsstoreoperationslogic,theorderofcontrol,timing,countingandcomputing,andotheroperatinginstructions;anddigitalinputandoutputoperationtocontrolalltypesofmachineryandproductionprocess.ThepreparationoftheusercontrolprocedurestoexpresstheproductionprocessrequirementsandadvanceintothePLCuserprogrammemory.Run-timebystoringthecontentsonebyonetheimplementationofprocedurestocompletetheprocessrequiredtooperate.PLC'sCPUinstructionswithstep-by-stepprocesstostoretheaddressoftheprogramcounter,runningintheprocess,eachstepintheimplementationoftheautomaticcounterplus1,step-by-stepprocessfromthestart(zero-stepnumber),followedbythefinalsteptotheimplementationofthe(usuallyENDcommand),andthenreturntostartstep-by-stepcycleofoperation.EachPLCcompletedacycleofthetimerequiredfortheoperationknownasascanningcycle.DifferentmodelsofthePLC,scanningcycletocycleinamicrosecondbetweenthescoresofmicroseconds.PLCladderprogramusedincalculatinglogic,toshowtheadvantagesofquick,microsecondintheorderofmagnitude,calculatinglogic1Kprocedureslessthan1ms.Itallhaveinputasaswitchtohandlethevolume,16-bit(also32-bit)forasimulatedtraffic.PLClarge-scaleuseofaCPUtocompletethesimulationoftheamountofcomputing.TheresultssenttothePLCcontroller.ThesameI/Opointssystem,withPLCthanDCS,thecostshouldbelower(about40%oftheprovincetoaround).PLCspecialoperationdidnotstopitwithsoftwareandhardwarearecommon,somaintenancecostsmuchlowerthantheDCS.OneofthePLCcontroller,youcanreceivethousandsofI/Opoints(uptomorethan8000I/O).Iftheobjectisachainofequipment,smallloop,thePLCtoadoptmoreappropriate.AsaresultofGeneralPLCcontrolsoftwareinthedesignofmanagementinformationsystems,tobeeasier.Overthepast10years,withthePLCtolowerpricesandgrowinguserdemand,agrowingnumberofsmallandmedium-sizedequipmenttostartusingPLCcontrol,PLCinChinagrewrapidly.WithChina'srapideconomicdevelopmentandthebasisofthelevelof2安徽理工大學(xué)畢業(yè)設(shè)計(jì)automationandcontinuousimprovementinthenextperiodoftimeinthePLCwillcontinuetomaintainourgrowthmomentum.GeneralPLCcanbeusedinspecialequipmentthatitisanembeddedcontroller,butingeneraltherelativePLCandembeddedcontrollertohavehigherreliabilityandbetterstability.Practicalworkencounteredanumberofusersoftheoriginaluseofembeddedcontrollersarenowbeingusedorcustom-GeneralPLCtoreplacetheembeddedcontrollerPLC.PLCcontrolsystemdesignmainpointInthemodernizedindustrialproductionequipment,hasthemassivedigitalquantityandthesimulationquantitycontroldevice,forexampletheelectricalmachinerystops,solenoidvalve'smakeandbreak,theproductcounting,thetemperature,thepressure,thecurrentcapacityhypothesisandthecontrolandsoon,intheindustryscene'stheseautomaticcontrolquestion,theprogrammablecontroller(PLC)hasbecomeoneofsolutionmosteffectivetools.WhenPLCcontrolsystemdesignshouldpayattentiontothefollowingseveralspots.one,programmablecontroller(PLC)andprogrammer'sselectingandpurchasing:inthepresentmarket'sPLCproductisnumerous,besidesthedomesticallyproducedbrand,theoverseasbrandincludes:JapaneseOMRON,MITSUBISHI,FUJI,IDEC,HITACHI,doMutsuhito,Germany'sSiemens,SouthKorea'sLGandsoon,howselectandpurchasethePLCproduct?1.ThesystemfirstshoulddeterminethatthesystemusesPLCwiththePLCsingleplanecontroltoformthenetwork,fromthiscalculatestheinput,theoutput(I/O)thepoints,andwhenselectsandpurchasesPLCmustintheactualneedpointsfoundationreserve10%remainders.2.ThedefiniteloadtypeactsaccordingtothePLCout-porttohavetheloadistheconcurrentortheexchange,isthebigelectriccurrentortheundercurrent,aswellasPLCoutputmovementfrequencyandsoon,thusdeterminedthattheout-portusestherelaytooutputthetransistortooutput,perhapsthrusteroutput.Thedifferentloadselectsthedifferentoutputmodetosystem'ssteadyoperationisveryimportant.3.ThestoragecapacityandtheinstructioncarryoutthespeedarethePLCshapingimportanttargets,generallythereservesisbigger;thespeedquickerPLCpricetobehigher,althoughoverseasvariousfactoriesproductmoreorlessthesame,butalsohascertaindifference.4.“COM"choice,differentPLCproduct,it"COM"aquantityisdissimilar,some"COM"belt8outputspots,somebelt4outputspots,alsohasthebelt1or2outputspot.3安徽理工大學(xué)畢業(yè)設(shè)計(jì)Whentheloadtypearemany,andtheelectriccurrentisbigtime,usesone"COM"abelt1-2outputproduct,whentheloadtypeminorityquantityaremany,usesone"COM"abelt4-8outputproduct.5.BecauseeachManufacturer'sdevelopmentsoftwareisdifferent,thecompatibilityisalsosystematicallyselectsandpurchaseswhenthekeypoint,atpresenthadnotdiscoveredthatthecompletelycompatibleproduct,shouldselectthePLCproductreasonablyaccordingtothesystem.6.Programmer'sselectingandpurchasing:thePLCprogrammingmayadoptthreeways:First,withthegeneralhandholdprogrammer,itcanonlyuseinthesentencetablesentenceprogrammingwhichthefactorystipulated.Centerwayeasyscenedebugging,andthevolumesmallcostislow,butitsefficiencylowadaptationaircrafttypearefew,comparedwithissuitableissmallinthesystemcapacity,inamountusedfewsystems.Second,thegraphprogrammerprogramming,thiswayusesthegraphicmodeprogramming,facilitatesintuitively,generallytheelectricalpersonnelshort-termmayapplyfreely,buttheprogrammerpriceishigh.Third,programswithIBMandthecompatiblepersonalcomputer+PLCsoftwarepackage,thiswayistheefficiencyhighestoneway,isalsothemostcommonlyusedoneway,butthemajorityofsoftwarepackagepriceisexpensive.7.selectsthebigcompany'sproductasfaraspossible,becauseitsproductqualityhasthesafeguard,andthetechnicalsupport,thepost-saleserviceisalsogenerallygood,willbeadvantageousinthelaterproductexpansionandthesoftwareandhardwarepromotion.Second,input,outputcircuit'sdesign1.Powersourcereturnroute.ThePLCpowersupplyisgenerallyAC85-240V(alsohasDC24V),adaptsthepowersourcescopetobewide,butfortheantigambling,shouldinstallthepowersourcetopurifythepart(forexamplepowersourcefilter.1:1insulatingtransformerandsoon)on2.PLCDC24Vpowersource'suse.]OnvariouscompaniesPLCproducthastheDC24Vpowersourcegenerally,butthispowersourcecapacityissmall,isseveraldozensmillamperestoseveralhundredmillamperes,withitsbeltloadwhenshouldpayattentiontothecapacity,simultaneouslycompletesagainstshortcircuitmeasure(,becausethispowersource'soverloadorshortcircuitwillaffectPLCthemovement).3.ExteriorDC24Vpowersource.IftheinputcircuithastheDC24Vpowersupplyproximityswitch,theelectro-opticalswitchandsoon,butonthePLCDC24Vpowersourcecapacityisinsufficienttime,mustprovidetheDC24Vpowersourcefromexterior;Butthispowersource"one"theenddonot"one"aswellas"COM"lookscarefullythecompanywiththePLCDC24Vpowersource,will4安徽理工大學(xué)畢業(yè)設(shè)計(jì)otherwiseaffectPLCthemovement.4.inputsensitivity.EachManufacturerhasthestipulationtothePLCinputvoltageandtheelectriccurrent,whenreceiver'sinputcurrentisbiggerthanPLCthebiggestinputcurrentorhasleakstheelectriccurrent,willcontainerrorsthemovement,reducesthesensitivity.Thereforeshouldbesuitabletheweak-currentinputandtoleakstheelectriccurrenttotaketheprotectivemeasure,andselectstheinputtosupplytoleakinputPLC.Whenthetwotypessensor(electro-opticalswitch,non-contactswitch)havetheLEDlimitswitch,theinputleakageisinoperableforlackhasthewronginputorthelampisbright,thecountermeasurereducestheinputimpedancefortheconnectionbleeder,theresistancenumberbyFigure1equationdevelopment:whenthetransistororthebidirectionalsilicon-controlledrectifieroutput,ifreceivesbigsurgecurrentontheequipment,mustconsidertheprotectiontransistorandthesilicon-controlledrectifier.Thetransistorandthesilicon-controlledrectifiermayundergothenominalcurrent10timesofsurgecurrents,ifsurpasses,mayaccordingtoFigure2,chart3onereduceit:5.Processestotheperceptualload.Wheninput,outputterminationperceptualload,mustintheloadbothsidesparallelimpactblankerorthediode,diode'snegativepoleandthevoltage㈩Leansextremelytheconnection.6.TheexteriorinterlockwithearthsusingthePLCcontrolelectricalmachinerywhenreversesandsoon,thecounter-movement,isavoidsPCtheunusualmovementcausingtheaccidentandthemachinerydamage,shouldinexteriorcomposeachain-likereturnroute.Earth:TheGRpostistheearthterminal.Withpreventstheinducedelectricityspecial-purposetomeetthegrounding(thecross-sectionalarea2mm2aboveelectricwire)toselectthethirdearthmethod(earthresistance100Ωbelow).LGisthenoisefilterneutralpost,ifhasthedisoperationgreatlybecauseofthenoise,ortopreventtheelectricshock,LGandtheGRpipenipple,selectsthethirdearthmethod.Meetsthegroundingthelengthin20mforsuitable.Meetsthegroundingtouseincommonwithotherequipmentorcanworkjusttheoppositewithbuilding'smetalstructureconnection,comesunderthebadinfluence.7.PLCexternaldriveelectriccircuitcannotleadtheloaddirectlyregardingthePLCoutputinthesituation,mustinexteriorusethedrivingcircuit,mayusethesolidstaterelayorthethrusterelectriccircuitactuates,simultaneouslyshouldusetheprotectioncircuitandthesurgeabsorbingcircuit.theotherPLCinputoutputwiringalsohascertainrequest,pleaserefertovariouscompanies'instructionforuse.First,theexpansionmoduleselectsregardingthesmallsystem,likein80spotsystems,donotneedtoexpandgenerally;whenthesystemisbig,mustexpand.Thedifferentcompany'sproduct,hasthelimittothesystemtotalpointsandexpansionmodule5安徽理工大學(xué)畢業(yè)設(shè)計(jì)quantity,whenexpandsstillcouldnotmeettheneeds,mayusethenetworkarchitecture.Atthesametime,somefactoryproduct'sindividualinstructiondoesnotsupporttheexpansionmodule,therefore,whencarriesonthesoftwaretoprogrammustpayattention.Whenusesanalogmodulesandsoontemperature,variousfactoriesalsohavesomestipulations,pleaserefertothecorrelationtechniquehandbook.Second,PLCnetworksdesign,whencarriesonthenetworkdesignwithPLC,itsdifficultycontrolsthePLCsingleplaneismuchbiggerthan,firstiselectedwiththequitefamiliartype,hasthethoroughunderstandingtoitselementaryinstructionandthefunctioncommand,andtheinstructioncarriesoutthespeedandtheuserprogramstoragecapacityshouldalsotheinquireclosely.Otherwisecannotadaptthereal-timerequest,createsthesystemcollapse.Moreovertothecorrespondenceconnection,thecommunicationprotocol,thedatatransferspeedandsoonmustconsider.MustseekthenetworkdesignandthesoftwaresupportandthedetailedtechnicaldatafinallytothePLCfactory,asforselectsseveralworkstations,decidesaccordingtothesystemsize.Third,softwaresestablish.Beforecompilingthesoftware,shouldfirstbefamiliarwiththePLCproductinstructionbookletwhichselects,aftertreatingfamiliar,programsagain.Ifusesthegraphprogrammerorthesoftwarepackageprogramming,thenmayprogramdirectly,ifwiththehand-holdprogrammerprogramming,shoulddrawthetrapezoidalchartfirst,thentheprogramming,mayreducelikethismakesamistake,thespeedisalsoquick,afterformingcompletes,revolvesspatiallyfirst,aftertreatingeachmovementnormally,thenontheequipmentdebugs.Thepulsequantity'scontrolusesinstep-by-steppingmuchtheelectricalmachinery,theservoelectricalmachinery'sanglecontrol,thedistancecontrol,thepositioncontrolandsoon.Thefollowingistakestep-by-stepstheelectricalmachineryasregularlytoshoweachcontrolmode.1,step-by-stepselectricalmachinery'sanglecontrol.Mustfirststep-by-stepexplicitlyelectricalmachinery'ssegmentationnumber,thenthedeterminationstep-by-stepsthetotalpulsenumberwhichtheelectricalmachinerytransfersneeds.Computation“anglepercentage=hypothesisangle/360°(i.e.acircle)”“anangleactionpulsenumber=totalpulsenumber*anglepercentage.”theformulais:aangleactionpulsenumber=totalpulsenumber*(hypothesisangle/360°).2,step-by-stepselectricalmachinery'sdistancecontrol.Firstisclearstep-by-stepsthetotalpulsenumberwhichtheelectricalmachinerytransfersneeds.Thenthedeterminationstep-by-stepstheelectricalmachineryhoopdiameter,thecomputationhoopperimeter.6安徽理工大學(xué)畢業(yè)設(shè)計(jì)Calculateseachpulsingoperationdistance.Thelastcounthypothesisisawayfromthepulsenumberwhichmustmove.Theformulais:thehypothesisisawayfrom/[(hoopdiameter*3.14)fromthepulsenumber=hypothesis/atotalpulsenumber]3,tostep-by-stepelectricalmachinery'spositioncontrolaretheanglecontrolandthedistancecontrolsynthesis.Theaboveisonlythesimpleanalysisstep-by-stepselectricalmachinery'scontrolmode,possibleandactualhasdiscrepancies,onlyforthefellowcolleaguestorefer.Theservoelectricalmachinery'smovementandstep-by-stepselectricalmachinery'sdissimilarity,butmustconsiderthattheservoelectricalmachinery'sinternalelectronicgearcomparesandtheservoelectricalmachinery'sreductiongearratio.Somematterssaidarequitesimple,butthepracticalapplicationhadthedifficulty.Askseverybodytocomprehendtruthintheactualwork.7安徽理工大學(xué)畢業(yè)設(shè)計(jì)中文翻譯目前，在自動(dòng)化領(lǐng)域主要的控制方式有繼電器、微機(jī)控制和PLC三種。由于PLC控制系統(tǒng)與繼電器控制系統(tǒng)及微機(jī)控制系統(tǒng)相比，具有設(shè)計(jì)、安裝、調(diào)試工作量小，研制周期短，可靠性高，抗干擾能力強(qiáng)，故障率低，對(duì)工作環(huán)境要求低，維護(hù)方便等一系列優(yōu)點(diǎn)。而繼電器控制系統(tǒng)因技術(shù)性能差，功能單一，在機(jī)械控制系統(tǒng)中很少使用。微機(jī)控制系統(tǒng)因抗干擾能力較差，對(duì)工作環(huán)境要求高，設(shè)計(jì)研制周期較PLC控制系統(tǒng)長(zhǎng)，因此，在自動(dòng)化控制領(lǐng)域的應(yīng)用呈逐年下降趨勢(shì)。隨著信息化產(chǎn)業(yè)的高速發(fā)展，數(shù)控機(jī)床的功能日趨完善，技術(shù)是機(jī)械工加自動(dòng)化的基礎(chǔ)，機(jī)床的刻心技術(shù)，其水平高低關(guān)系到國(guó)家戰(zhàn)略地位和體現(xiàn)國(guó)家綜合實(shí)力的水平。今后數(shù)控技術(shù)又將向著高進(jìn)數(shù)控機(jī)床已經(jīng)完全取代了普通機(jī)床，而數(shù)控是數(shù)控化，高速化，高效化，系統(tǒng)化，自動(dòng)化，智能化，集體化方向發(fā)展，并注重工藝適用性和經(jīng)濟(jì)性。由于z-3040型搖臂鉆床的電氣控制系統(tǒng)存在線路復(fù)雜、故障率高、維護(hù)工作量大、可靠性低、靈活性差等缺點(diǎn),本文提出了用PLC對(duì)z-3040型搖臂鉆床的繼電器接觸式模擬控制系統(tǒng)進(jìn)行技術(shù)改造,從而保證了電控系統(tǒng)的快速性、準(zhǔn)確性、合理性,更好地滿足了實(shí)際生產(chǎn)的需要,提高了經(jīng)濟(jì)效益。什么是PLC控制系統(tǒng)？自60年代以來(lái)，美國(guó)推出可編程邏輯控制器器），以取代傳統(tǒng)的控制設(shè)備，因?yàn)橹欣^，公司一直在快速發(fā)展中世界各地區(qū)都得到廣泛應(yīng)用。同時(shí)，PLC的功能也有所改善。隨著計(jì)算機(jī)技術(shù)，信號(hào)處理技術(shù)，控制技術(shù)，網(wǎng)絡(luò)技術(shù)的發(fā)展和用戶(hù)需求的不斷提高，PLC在處理開(kāi)關(guān)量的基礎(chǔ)上增加了模擬量處理和運(yùn)動(dòng)控制功能。今天，該公司已不再局限于邏輯控制，運(yùn)動(dòng)控制，程控制及其他領(lǐng)域也發(fā)揮了非常重要的作用。離散控制系統(tǒng)的首選產(chǎn)品，PLC在二十世紀(jì)90年代和80年代，取得了長(zhǎng)足的發(fā)展在世界上的PLC保持年均增長(zhǎng)20％至30％。隨著工廠自動(dòng)化和持續(xù)改進(jìn)的PLC和市場(chǎng)基礎(chǔ)擴(kuò)大最近幾年在PLC的工業(yè)增速下降趨勢(shì)，發(fā)達(dá)國(guó)家。然而，中國(guó)和其（可編程邏輯控制器，可編程控制過(guò)他發(fā)展中國(guó)家的公司的發(fā)展十分迅速。全面的信息，2004年全球銷(xiāo)售的PLC約一百萬(wàn)點(diǎn)零零零萬(wàn)美元，在自動(dòng)化領(lǐng)域發(fā)揮了非常重要的地位。PLC的觸摸的仿原繼電器控制關(guān)，首先應(yīng)用在汽車(chē)制造業(yè)。在執(zhí)行其存儲(chǔ)業(yè)務(wù)的邏輯，順序控制，定時(shí)，計(jì)數(shù)和計(jì)算，和其他業(yè)務(wù)的指示,和數(shù)字音頻輸入和輸出操作，控制所有類(lèi)型的機(jī)器和生產(chǎn)工原理研制在上世紀(jì)70年代，只有PLC邏輯控制開(kāi)藝。編寫(xiě)控制程序的用戶(hù)表示，生產(chǎn)過(guò)程的要求和進(jìn)入PLC的用戶(hù)程序存儲(chǔ)器。運(yùn)8安徽理工大學(xué)畢業(yè)設(shè)計(jì)行時(shí)存儲(chǔ)的內(nèi)容逐一執(zhí)行程序，以完成該過(guò)程所需的操作?？删幊炭刂破鞯腃PU指示一步一步進(jìn)程存儲(chǔ)地址的程序計(jì)數(shù)器，運(yùn)行在這個(gè)過(guò)程中，每個(gè)步驟的執(zhí)行情況自動(dòng)計(jì)數(shù)器加1，循序漸進(jìn)的過(guò)程從一開(kāi)始（零步數(shù)），其次是最后一步的執(zhí)行（通常最終命令），然后返回到開(kāi)始逐步循環(huán)作業(yè)。每個(gè)公司完成一作被稱(chēng)為掃描周期。不同型號(hào)的PLC，個(gè)周期所需的時(shí)間的運(yùn)循環(huán)掃描周期在微秒之間的分?jǐn)?shù)微秒。PLC在微秒量級(jí)，計(jì)算邏輯1000程序小于1毫秒。這一切都已經(jīng)投入作為一個(gè)開(kāi)關(guān)來(lái)處理量，16位（也32位）的模擬交通。PLC的大規(guī)模使用一個(gè)CPU來(lái)完成模的擬數(shù)額計(jì)算。結(jié)果發(fā)送給PLC控制器。梯形圖程序中使用的計(jì)算邏輯，顯示快速的優(yōu)點(diǎn)，相同的I/O點(diǎn)系統(tǒng)，DCS系統(tǒng)與PLC相比，成本應(yīng)該更低（約40％左右的?。?。PLC的特別行動(dòng)并沒(méi)有停止它的軟件和硬件很常見(jiàn)，所以維修費(fèi)用遠(yuǎn)遠(yuǎn)低于發(fā)展中國(guó)家。一個(gè)PLC控制器，您就可以果對(duì)象是一個(gè)鏈的設(shè)備，小環(huán)，臨立會(huì)通過(guò)管理信息系統(tǒng)，將更加容易。去10年中，與PLC在較低的價(jià)格和日益增加的用戶(hù)需求，越來(lái)越多的中小型設(shè)備，開(kāi)始使用PLC控制，PLC在我國(guó)迅速發(fā)展。隨著我國(guó)經(jīng)濟(jì)的快速發(fā)展和基礎(chǔ)自動(dòng)化水平和持續(xù)改進(jìn)在未來(lái)一段時(shí)間內(nèi)的PLC將繼續(xù)保持我們的增長(zhǎng)勢(shì)頭一般PLC的可用于特殊的設(shè)備，它是一個(gè)嵌入式控制器，但在一般的相對(duì)PLC和嵌入式控制器具有更高的可靠性和更好的穩(wěn)定性。實(shí)際工作中遇到了一些用戶(hù)原來(lái)使用的嵌入式控制器收到數(shù)以千計(jì)的I/O點(diǎn)（最多超過(guò)8000的I/）。O如更為恰當(dāng)。由于一般的PLC控制軟件的設(shè)計(jì)，在過(guò)現(xiàn)在正在使用或定制的可編程控制器，以取代嵌入式控制器PLC的。在現(xiàn)代化的工業(yè)生產(chǎn)設(shè)備，擁有大量的數(shù)字量和模擬量控制裝置，例如電機(jī)停止，電磁閥的制造和突破，產(chǎn)品計(jì)數(shù)，溫度，壓力，目前的能力假說(shuō)，以及控制和等等，在業(yè)界現(xiàn)場(chǎng)的這些自動(dòng)控制問(wèn)題，可編程控制器（PLC）已成為解決最有效的工具。PLC控制系統(tǒng)設(shè)計(jì)的注意可編程控制器（PLC）和程序員的選擇和采購(gòu)：在目前市場(chǎng)上PLC的產(chǎn)品很多，除了國(guó)產(chǎn)品牌，國(guó)外品牌包括：日本歐姆龍，三菱，富士，IDEC制藥公司，日立，做Mutsuhito，德國(guó)的西門(mén)子，韓國(guó)LG等，如何選擇和購(gòu)買(mǎi)的PLC產(chǎn)品？1.該系統(tǒng)首先應(yīng)確定，該系統(tǒng)采用可編程控制器與PLC的單一平面控制，形成網(wǎng)絡(luò)，從這一計(jì)算輸入，輸出（I/O）的點(diǎn)，選擇和購(gòu)買(mǎi)時(shí)，必須在公司的實(shí)際需要點(diǎn)基礎(chǔ)其余10％的準(zhǔn)備金。2.在一定的負(fù)荷型行為根據(jù)PLC的暗流，以晶閘管輸出。不同的負(fù)載選擇不同的輸出模式，系統(tǒng)的穩(wěn)定運(yùn)行是非常重要的。3.在存儲(chǔ)容量和指令執(zhí)行速度是PLC的塑造重要的目標(biāo)，一般儲(chǔ)備大，速度快PLC的價(jià)格較高，但海外各廠家的產(chǎn)品大致相同，但也有一定的差異。出端口有負(fù)載的流或Exchange，是大電流或及PLC輸出運(yùn)動(dòng)頻率等，從而確定出端口使用繼電器輸出晶體管輸出，也許9安徽理工大學(xué)畢業(yè)設(shè)計(jì)“4.com”域名的選擇，不同公司的產(chǎn)品,“com”它域名的數(shù)量是不同的，有些“com”域名的輸出帶8點(diǎn)，一些帶4個(gè)輸出點(diǎn)，還帶1個(gè)或2個(gè)輸出點(diǎn)。當(dāng)負(fù)載類(lèi)型有很多，和大電流時(shí)，使用一個(gè)“com”域名皮帶1-2輸出產(chǎn)品，當(dāng)負(fù)載類(lèi)型少數(shù)民族數(shù)量很多，使用一個(gè)“com”域名皮帶4-8輸出產(chǎn)品。5.因?yàn)槊總€(gè)制造商開(kāi)發(fā)軟件是不同的，兼容性也系統(tǒng)地選購(gòu)時(shí)，關(guān)鍵的一點(diǎn)，目前還沒(méi)有發(fā)現(xiàn)完全兼容的產(chǎn)品，應(yīng)選擇合理的PLC產(chǎn)品根據(jù)系統(tǒng)。6.程序員的選擇和采購(gòu)：在PLC編程可通過(guò)三種方式：第一，與一般手持編程器，它只能使用表中的一句編程工廠規(guī)定。中心現(xiàn)場(chǎng)調(diào)試方法簡(jiǎn)單，體積小成本低，但其效