外文翻译--可编程控制器技术.doc

英文原文PLCtechniquediscussionandfuturedevelopmentAlongwiththedevelopmentoftheages,thetechniquethatisnowadaysisalsograduallyperfect,thecompetitionplaysmorestrongtheoperationthatlistdependstheartificialhasalreadycantsatisfiedwiththecurrentmanufacturingindustryforeground,alsocantguaranteetherequestofthehigherquantityandhighnewtheimageofthetechniquebusinessenterprise.Thepeopleseeinproducepractice,automatebroughtthetremendousconvenienceandtheproductquantitiesforpeopleupofassurance,alsoeasedthepersonnelslaborstrength,reducetheestablishmentonthepersonnel.Thetargetcontrolofthehardrealizationinmanycomplicatedproductionlines,wholeandexcellentturn,thebestdecisionetc.,welltrainedoperationwork,technicalpersonnelorexpert,governorbutcanjudgeandoperateeasily,canacquirethesatisfiedresult.Theresearchtargetoftheartificialintelligencemakesuseofthecalculatorexactlytocarryout,imitatetheseintelligencesbehavior,moderatingtheworkthroughpersonsbrainandcalculators,withthemodethatpersonsmachinecombine,forresolvetheverycomplicatedproblemtolookforthebestpathWecomeinsightofthecontrolthatlinksaftertheelectricappliancesinvarioussituation,thatisalreadythethattimegenerationpast,nowofafteruseinthemoldaperhapssimpleequipmentsofgrassrootscontrolthattheelectricappliancescandoforthelowlevelonlyAndthePLCemergencealsobecametheepochmakingtopic,addingthevividsoftwarecontrolthroughaveryandstablehardware,makingtheautomationheadforthenewhightide.ThePLCbiggestcharacteristicslieinTheelectricalengineeringteacheralreadynolongerelectrichardwareuptoomanycalculationsofcost,aslongasordertheimportationthatthebuttonswitchortheimportationofthesensorsordertolinkthePLCupcansolveproblem,passtooutputtoordertheconjunctioncontactmachineorcontrolthestartequipmentsofthebigpoweraftertheelectricappliances,buttheexportationequipmentsdirectconjunctionofthesmallpowercan.PLCinternalcontainmenthavetheCPUoftheCPU,andtaketohaveanI/Oforexpandofexteriortoconnectapeoplesaddressandsavingmachinethreebigpiecestoconstitute,CPUcoreisfromanormanyistiredtoaddthemachinetoconstitute,mathematicsthattheyhavethelogicoperationability,andcanreadtheproceduresavethecontentsofthemachinetodrivethehomologoussavingmachineandI/OstoconnectafterpassthecalculationTheI/Oaddinnerpartistiredtheinputandoutputsystemofthemachineandexteriorlink,anddeposittherelateddataintotheproceduresavingmachineordatasavingmachineThesavingmachinecandepositthedatathattheI/Oinputinthesavingmachine,andinworkadjustingtobecometiredtoaddthemachineandI/Ostoconnect,savingmachineseparatelysavingmachineRAMoftheproceduresavingmachineROManddates,theROMcandodepositofthedatapermanenceinthesavingmachine,butRAMonlyfortheCPUcomputesthetemporarycalculationusageofhourofbufferspace.ThePLCantiinterferenceisveryandexcellent,ourrootneednotconcernitsservicelifeandtheworksituationbad,theseallproblemshavealreadynolongerbecomethetopicthatwefail,butstaytoourisaconcerntocometointernalresourcesofmakeuseofthePLCtostrengthenthecontrolabilityoftheequipmentsforus,makeourequipmentsmoregentle.PLClanguageisnotweimagineofeditcollectedmaterialsthelanguageorlanguageofCstocarryonweavingthedistance,butthetrapezoiddiagramthattheadoptionisoriginalaftertheelectricappliancestocontrol,maketheelectricalengineeringteacherwhileweavingtowritetheprocedureveryeasycomprehendedthePLClanguage,andalotofnonelectricityprofessionalalsoveryquicklyknowandgodeepintotothePLC.IsPLConeoftheadvantageaboveandonly,thisisalsoonepartthatthepeoplecomprehendmoreandeasily,inalotofequipments,thepeoplehavealreadynolongerhopedtoseetoomanycontrolbuttons,theydamagenotonlyandeasilyandproducetheartificialerroreasiest,smallisnotamainerrorperhapsyoucanstillacceptButleadevenisafatalerrorgreatlyiswhatwecantistolerantof.Newtechniquealwaysforbringingmoresafeandconvenientoperationforus,makewealotofproblemsforfaceonsweepbutlight,doyouunderstandtheHMISaystheHMIhereyoubasicallynotclearwhatitis,alsohavenointerestunderstanding,changeoneinsidetextexplainsitintothetouchtoholdormanmachineinterfaceyouknew,anditcombineswiththePLCtoourlargerspace.HMIthecontrolnotonlyisreducedthecontrolpressbutton,increasethevividofthecontrol,moremainofitiscansequenceof,andatcanthechangedatainputtooutputthefeedbackwithdata,controlinthetemperaturecurveofimitatebutalsocankeepthemanifestationofviewtocomeout.Andcanwritethefunctionhelpprocedurethroughaplaittoprovidethehelpofvariouswhatliesinonespower,theonewhomakeoperatereducestheotioseerror.CurrentlytheHMIfactoryisalsomoreandmore,thefunctionisalsomoreandmorestrong,thepriceisalsomoreandmorelow,andthenoodlesoftheusagearewidemoreandmore.TheHMIforegroundcansaythatthink°tobegoodvery.Atalotofsituations,thelistisasmoothmovementthatcantguaranteetheequipmentsbythecontrolofthesinglemachine,butpasstheinformationexchangesoftheequipmentsandequipmentstoattaintheresultthatwewant.Forexampleforepackandtheexaminationoftheempressworkpreface,wewillarrivewrappinginformationfeedbacktoexaminetheplace,andexaminetheinformationoftheplacetoalsowantthefeedbacktopacking.Passtheinformationsharethustomakeboththechainconnect,becomingatotalbody,thematchofyourthatthusmakeismoreclose,ateachotherattaintoreflecttheresultthatmutuallyflick.ThePLCcorrespondencehasalreadycomemorebodynowitsvalue,atthePLCandcorrespondencebetweenPLCs,canpassthecommunicationoftheinformationandtheshareofthedatestoguaranteethatoftheequipmentsmoderatesmutually,theresultthatarrivealreadytorepairwitheachother.DataconversiontheadoptionRS232betweenPLCconnecttocometothetransmissiondata,buttheRS232pickupapeopleandcanguarantee10metersonlyofdeliverthedistance,ifinthedistanceof1000meterswecanpasstheRS485tocarryonthecorrespondence,thelongerdistancecanpasstheMODELonlytocarryondeliver.ThePLCdatatransmissionisjusttobecalledaformtoitinapieceofandcontinuousaddressthatthedataoftheinnerpartdeliverstheotherparty,we,thePLCoftheotherpartypassestoreaddatainthewatchtocarryontheoperation.Ifthedatathatdatainthewatchisatoestablishgenerally,thatisjustthegeneraldatatransmission,forexampletodayofoilpricerise,Iwanttodeliverthepriceoftheoilpricetolosetheoilallyonboard,thatistheshareofthedataButtakedatainthewatchforaninstructionprocedurethatcontrolsthePLC,thathadthedifficultyverymuch,forexampleyouhavetocontrolonepedestalrobottopresstheactionworkthatyouimagine,youwilldrawupforittheformthataprocedurecombinewiththedatasendsouttopassby.Theformthatinformationtransportcontainsinglework,thehalfaworkandthedifferenceofaworkers.Themeaningofthesingleworkalsoistosayboth,acansendoutonly,butacanreceiveonly,forexampleaspyhecanreceivethedesignationofthesuperioronly,butcantgivethesuperiorreplyAworkofhalfisalso2andcansendoutsimilartoacceptthedata,butcantsendoutandacceptatthesametime,forexamplewhenyoumakeaphonecallistocantanswerthephone,theotherpartyalsoButwholepairworksisbothcansendoutandacceptthedata,andcansendoutandacceptatthesametime.BeliketheInternetisatypicalexample.TheprocessthatinformationtransportalsohassynchronousanddifferentstepcentThedatalineandtheclocklinesaresynchronouswhensynchronousmeaninglieinsendingoutthedata,isalsothedatasignalandtheclocksignalstobecarryonbytheCPUtosendoutatthesametime,thisneedstoallwantthespecializedclocksignaleachothertocarryonthetransmissionandconnecttosend,andisconstrained,thecharacteristicsofthiskindofmethodliesinitsspeedveryquick,butcorrespondworktimeoftakeuptheCPUandalsowanttobelongoppositely,atthesametimethetechniquedifficultyalsoverybig.Itsrequestliesincantinghaveanerrormarginsinadatesdeliver,otherwisethewholepieceaccordingtocomparetheoccurrencemistake,thisonthehardwareisabiggerdifficulty.Appliedmoreandmoreextensiveinsomeappropriativeequipments,beliketheappropriativemedicaltreatmentequipments,thenumericalsignalequipments...etc.,incomparetheonedatadeliver,itsresultisverygood.Andthedifferentstepisanapplicationthemostextensive,thisreceivebenefitinitoftechniquedifficultyisoppositeandwanttobesmall,atthesametimenotneedtopreparethespecializedclocksignal,itscharacteristicstoliein,itsdataispartition,thelonglostsendoutandaccept,betheCPUistoobusyoftimecangrindtoastopsextowork,alsoreducedthedifficultyonthehardware,thedatathrowtoloseatthesametimeoppositewanttobelittle,wecanpasstheexaminationofthedatatoobservewhetherthedatathatwesendouthasthemistakeornot,belikestrangeaccidentallythemethod,tiredadditionandeightefficaciesmethodetc.,canusetohelpswhetherthedatathatweexaminetosendouthaveornotthemistakeoccurrence,passthefeedbacktocarryonthediscriminator.AlineoftransmissionoftheinformationcontainsastringofandcombinethecentofTheusualPLCis8machines,certainlyalsohaving16machines.Wecanbeanatthetimeofsendingoutthedataasendouttotheotherparty,alsocanbe88sendoutthedatatotheotherparty,anand8differentiationsarealsotheasthatwesaytosendoutthedataandcombinesendsoutthedata.Aspeedismoreandslowly,butaslongas2orthreelinescansolveproblem,andcanusethetelephonelinetocarryonthelongrangecontrol.Butcombinetheoculartransmissionspeedisveryquickof,itisastringofocularof25600,occupytheadvantageintheshortdistance,theinviewofthefactTTLelectricityiseven,beinglimitedbythescopeofonemetergenerally,itcombineunwellusedforthedatatransmissionofthelongpull,thusthecostistooexpensive.Underalotofcircumstanceswearetotaltoliketoadoptthestringtocombinetheconversionchiptocarryondeliver,underthiskindofcircumstancenotneedustocarryontodepositedthemachinetoestablishtooandcomplicatedly,butcarryonthedataexchangesthroughthedatatransmissioninstructiondirectly,butisnotaveryviablewayinthecorrespondence,becausethePLCoftheotherpartymusthasbeenwaitforyourdataexportationatthetimeofsendingoutthedata,itcantdootherworks.Whenyouarereadingthebook,youhearsomeoneknockondoor,youstoptostartupofaffair,openthedoorandcombinetocontinuewiththeonewhoknockondooradialogue,thetelephoneofthistimerang,yousignalhinttoconnectatelephone,afterconnectingthetelephonethrough,returnoverdocometogetherknockondoortohaveaconversation,afterdialoguecomplete,youcontinueagaintoseeyourbook,thiskindofcircumstancewearecalledtheinterruptiontoit,ithastheauthority,alsohavingsexofhavetheinitiative,thePLChadsuchfunction.Itscharacteristicslieinusandmaymeettheurgentlyabruptaffairsintheoperationprocessoftheequipments,wewanttostoptostartimmediatelyupofwork,thewhereaboutsmanagesthemoreimportantaffair,thiskindofcircumstanceisweusuallymeetof,PLCwhilecarryouturgentmission,totalwillkeepthecurrentappearancefirst,forexampletheaddressoftheprocedure,CPUoftiredaddthemachinedataetc.,beliketostickdownwhichthebookthatweseeiswhenweopenthedoorthepageor