中英文文献翻译关于PLC外文翻译.docx

中英文文献翻译关于PLC外文翻译.docx

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中英文文献翻译关于PLC外文翻译

外文文献

PLCtechniquediscussionandfuturedevelopment

ProgrammableController（ProgrammableLogicController,customarilyreferredtoasPLC）isamicroprocessorasthecoreofthegeneralindustrialautomationdevices.Isinthelate1960sintherelaycontrolsystemdevelopedonthebasisof,itwilltraditionalrelaycontroltechnologycombinedwithcomputertechnologyandcommunicationtechnology,hasasimplestructure,superiorperformance,highreliability,flexible,generalandconvenientuse,easytoprogramming.Inparticular,thecharacteristicsofthePLCisshownasthefollowing

Aspects:

（1）thehighreliabilityofhardware.PLCisspecializedinindustrialenvironmentundertheconditionsofapplicationanddesign.CanbeplacedinawelldesignedPLChasaveryhighvoltagenoise,electromagneticinterferenceandmechanicalvibration,extremetemperature,andhumidityenvironment.Isintheaspectofhardwaredesign,firstofallwithhighqualitycomponents,andadoptreasonablesystemstructure,strengthening,simplifyinstallation,makesiteasytoantivibrationshock,totheprintedcircuitboarddesign,machiningandweldingprocessaretakenverystrictmeasures,andonthecircuit,thestructureandprocesshadtakensomeuniqueways.BecausethePLCitselfhasveryhighreliability,sointheeventofafailurepartsmostlyfocusedontheinput/outputpartsandsuchassensors,limitswitches,photoelectricswitch,electromagneticvalve,motor,etc.programmingandeasytouse.Automaticcontrolbymicrocomputer,commonlyusedassemblylanguageprogramming,difficulttograsp,requirestheuserhasacertainlevelofknowledgeofcomputerhardwareandsoftware.PLCusedforprocesscontrol,problemorientedprogrammingmethod,comparedwiththecurrentlyusedassemblylanguagemicrocomputercontrol,whileinsidethePLCincreasestheinterpretationprocedure,toincreasetheprogram'sexecutiontime,butformostofthemechanicalandelectricalcontrolequipment,thislossisnegligible.（3）Wiringissimple,highuniversality.Inthecaseofelectricalmatching,PLCconnectionjustputtheinputsignalofthedevice（button,switch,etc.）connectedtotheinputterminalofPLC,willaccepttheoutputsignalofexecutivecontroltasks（contactor,solenoidvalves）,executivecomponentsconnectedtothePLCoutputterminals.Wiringissimple,leavesouttheconventionalrelaycontrolsystemwiringandremovingthetrouble.PLCprogramminglogicprovidescanchangeaccordingtotherequirementsoflogicalrelationship,sothatproductionlineautomationprocesscanchangeatwill.ThisperformancemakesthePLChastheveryhigheconomicbenefits.UsedtoconnectfielddevicesofthehardwareinterfacedesignhasactuallybecomeapartofPLC,sincethediagnosisofmodularinterfacecircuitcanpointtothefault,andeasytotroubleshootingandreplacementoffaultparts,sothatthesoftwareandhardwaredesignofthesiteelectricalpersonnelandtechnicalpersonneltouse.（4）canbeconnectedtocontrolnetworksystem.PLCcanbeconnectedtobecomepowerfulnetworksystem.GeneralPLCnetworkcanbedividedintotwokinds:

onekindisalow-speednetwork,USESthemaster-slavemodecommunication,transferratefromthepotterthousandsandthousandsofpottertothetransmissiondistanceis500~2500m;Anotherkindofhigh-speednetwork,USESthetokenpassingmodecommunication,communicationrateof1mto10MBPS,transmissiondistanceis500~1000m,1024onlinenodes.Thesetwotypesofnetworksarelinkedtogether,canbecompatiblewithdifferenttypesofprogrammablecontrollerandcomputer,formingcontrolrangealotoflocalnetwork.5.Easytoinstall,easytomaintain.PLCinstallationissimpleandpowerfulfunctions,itsrelativelysmallsizeallowsthemtoinstalltherelaycontrolboxusuallyrequiredforhalfofthespace.InthelargePLCsysteminstallation,remoteI/ointheoptimallocation.RemoteI/Ostationthroughdoubleaxisofcoaxialcable,oreventotheCPU,whichgreatlyreducesthematerialandlabor,remotesubsystemmethodmeansfromdifferentpartsofthesystemcanbeinstalledinfield.Becausealmostallofthecomponentsaremodular,onlyneedtochangewhenmaintainingmodulelevelplug-incomponents,faultdetectioncircuitdiagnosisindicatorwillbeembeddedineachpart,canindicatethedeviceisworkingcorrectly,theresistanceinprogrammingisvisibleinput/outputdevicesONorOFF,stillcanwriteprogramminginstructionstoreportfailures.Inaddition,PLCautomationtechnology,computertechnologyandcommunicationtechnologytogether,andyoucanalsocompletethefollowingfunctions:

logiccontrol,timingcontrol,countingcontrol,steppercontrol,A/DandD/Aconversion,dataprocessing,communicationnetworkandmonitoringonthecontrolsystem.Ingeneral,theapplicationofPLChaveboomintheworld,thePLCdevelopmentdirectionmainlytowardminiaturization,deflationaryforce,standardization,standardization,intelligence,highspeed,largecapacity,networkdevelopment,thiswillmakethePLCfunctionisstronger,higherreliability,moreconvenientuse,wideapplicationandmore

ThePLCbiggestcharacteristicsliein:

Theelectricalengineeringteacheralreadynolongerelectrichardwareuptoomanycalculationsofcost,aslongasordertheimportationthatthebuttonswitchortheimportationofthesensorsordertolinkthePLCupcansolveproblem,passtooutputtoordertheconjunctioncontactmachineorcontrolthestartequipmentsofthebigpoweraftertheelectricappliances,buttheexportationequipmentsdirectconjunctionofthesmallpowercan.

PLCinternalcontainmenthavetheCPUoftheCPU,andtaketohaveanI/Oforexpandofexteriortoconnectapeople'saddressandsavingmachinethreebigpiecestoconstitute,CPUcoreisfromanormanyistiredtoaddthemachinetoconstitute,mathematicsthattheyhavethelogicoperationability,andcanreadtheproceduresavethecontentsofthemachinetodrivethehomologoussavingmachineandI/Ostoconnectafterpassthecalculation;TheI/Oaddinnerpartistiredtheinputandoutputsystemofthemachineandexteriorlink,anddeposittherelateddataintotheproceduresavingmachineordatasavingmachine;ThesavingmachinecandepositthedatathattheI/Oinputinthesavingmachine,andinworkadjustingtobecometiredtoaddthemachineandI/Ostoconnect,savingmachineseparatelysavingmachineRAMoftheproceduresavingmachineROManddates,theROMcandodepositofthedatapermanenceinthesavingmachine,butRAMonlyfortheCPUcomputesthetemporarycalculationusageofhourofbufferspace.

ThePLCanti-interferenceisveryandexcellent,ourrootneednotconcernitsservicelifeandtheworksituationbad,theseallproblemshavealreadynolongerbecomethetopicthatwefail,butstaytoourisaconcerntocometointernalresourcesofmakeuseofthePLCtostrengthenthecontrolabilityoftheequipmentsforus,makeourequipmentsmoregentle.

PLClanguageisnotweimagineofeditcollectedmaterialsthelanguageorlanguageofCstocarryonweavingthedistance,butthetrapezoiddiagramthattheadoptionisoriginalaftertheelectricappliancestocontrol,maketheelectricalengineeringteacherwhileweavingtowritetheprocedureveryeasycomprehendedthePLClanguage,andalotofnon-electricityprofessionalalsoveryquicklyknowandgodeepintotothePLC.

IsPLConeoftheadvantageaboveandonly,thisisalsoonepartthatthepeoplecomprehendmoreandeasily,inalotofequipments,thepeoplehavealreadynolongerhopedtoseetoomanycontrolbuttons,theydamagenotonlyandeasilyandproducetheartificialerroreasiest,smallisnotamainerrorperhapsyoucanstillaccept;Butleadevenisafatalerrorgreatlyiswhatwecan'tistolerantof.Newtechniquealwaysforbringingmoresafeandconvenientoperationforus,makewealotofproblemsforfaceonsweepbutlight,doyouunderstandtheHMI?

SaystheHMIhereyoubasicallynotclearwhatitis,alsohavenointerestunderstanding,changeoneinsidetextexplainsitintothetouchtoholdorman-machineinterfaceyouknew,anditcombineswiththePLCtoourlargerspace.

HMIthecontrolnotonlyisreducedthecontrolpressbutton,increasethevividofthecontrol,moremainofitiscansequenceof,andatcanthechangedatainputtooutputthefeedbackwithdata,controlinthetemperaturecurveofimitatebutalsocankeepthemanifestationofviewtocomeout.Andcanwritethefunctionhelpprocedurethroughaplaittoprovidethehelpofvariouswhatliesinone'spower,theonewhomakeoperatereducestheotioseerror.CurrentlytheHMIfactoryisalsomoreandmore,thefunctionisalsomoreandmorestrong,thepriceisalsomoreandmorelow,andthenoodlesoftheusagearewidemoreandmore.TheHMIforegroundcansaythatthink°tobegoodvery.

Atalotofsituations,thelistisasmoothmovementthatcan'tguaranteetheequipmentsbythecontrolofthesinglemachine,butpasstheinformationexchangesoftheequipmentsandequipmentstoattaintheresultthatwewant.Forexampleforepackandtheexaminationoftheempressworkpreface,wewillarrivewrappinginformationfeedbacktoexaminetheplace,andexaminetheinformationoftheplacetoalsowantthefeedbacktopacking.Passtheinformationsharethustomakeboththechainconnect,becomingatotalbody,thematchofyourthatthusmakeismoreclose,ateachotherattaintoreflecttheresultthatmutuallyflick.

ThePLCcorrespondencehasalreadycomemorebodynowitsvalue,atthePLCandcorrespondencebetweenPLC,canpassthecommunicationoftheinformationandtheshareofthedatestoguaranteet