外文翻译--PLC技术讨论和未来发展.doc

英文原文PLCtechniquediscussionandfuturedevelopmentAlongwiththedevelopmentoftheages,thetechniquethatisnowadaysisalsograduallyperfect,thecompetitionplaysmoremorestrong；theoperationthatlistdependstheartificialhasalreadycantsatisfiedwiththecurrentmanufacturingindustryforeground,alsocantguaranteetherequestofthehigherquantityandhighnewtheimageofthetechniquebusinessenterprise.Thepeopleseeinproducepractice,automatebroughtthetremendousconvenienceandtheproductquantitiesforpeopleupofassurance,alsoeasedthepersonnelslaborstrength,reducetheestablishmentonthepersonnel.Thetargetcontrolofthehardrealizationinmanycomplicatedproductionlines,wholeandexcellentturn,thebestdecisionetc.,well-trainedoperationwork,technicalpersonnelorexpert,governorbutcanjudgeandoperateeasily,canacquirethesatisfiedresult.Theresearchtargetoftheartificialintelligencemakesuseofthecalculatorexactlytocarryout,imitatetheseintelligencesbehavior,moderatingtheworkthroughpersonsbrainandcalculators,withthemodethatpersonsmachinecombine,forresolvetheverycomplicatedproblemtolookforthebestpathWecomeinsightofthecontrolthatlinksaftertheelectricappliancesinvarioussituation,thatisalreadythethattimegenerationpast,nowofafteruseinthemoldaperhapssimpleequipmentsofgrass-rootscontrolthattheelectricappliancescandoforthelowlevelonly；AndthePLCemergencealsobecametheepoch-makingtopic,addingthevividsoftwarecontrolthroughaveryandstablehardware,makingtheautomationheadforthenewhightide.ThePLCbiggestcharacteristicsliein:Theelectricalengineeringteacheralreadynolongerelectrichardwareuptoomanycalculationsofcost,aslongasordertheimportationthatthebuttonswitchortheimportationofthesensorsordertolinkthePLCupcansolveproblem,passtooutputtoordertheconjunctioncontactmachineorcontrolthestartequipmentsofthebigpoweraftertheelectricappliances,buttheexportationequipmentsdirectconjunctionofthesmallpowercan.PLCinternalcontainmenthavetheCPUoftheCPU,andtaketohaveanI/Oforexpandofexteriortoconnectapeoplesaddressandsavingmachinethreebigpiecestoconstitute,CPUcoreisfromanormanyistiredtoaddthemachinetoconstitute,mathematicsthattheyhavethelogicoperationability,andcanreadtheproceduresavethecontentsofthemachinetodrivethehomologoussavingmachineandI/Ostoconnectafterpassthecalculation；TheI/Oaddinnerpartistiredtheinputandoutputsystemofthemachineandexteriorlink,anddeposittherelateddataintotheproceduresavingmachineordatasavingmachine；ThesavingmachinecandepositthedatathattheI/Oinputinthesavingmachine,andinworkadjustingtobecometiredtoaddthemachineandI/Ostoconnect,savingmachineseparatelysavingmachineRAMoftheproceduresavingmachineROManddatas,theROMcancandodepositofthedatapermanenceinthesavingmachine,butRAMonlyfortheCPUcomputesthetemporarycalculationusageofhourofbufferspace.ThePLCanti-interferenceisveryandexcellent,ourrootneednotconcernitsservicelifeandtheworksituationbad,theseallproblemshavealreadynolongerbecomethetopicthatwefail,butstaytoourisaconcerntocometointernalresourcesofmakeuseofthePLCtostrengthenthecontrolabilityoftheequipmentsforus,makeourequipmentsmoregentle.PLClanguageisnotweimagineofeditcollectedmaterialsthelanguageorlanguageofCstocarryonweavingthedistance,butthetrapezoiddiagramthattheadoptionisoriginalaftertheelectricappliancestocontrol,maketheelectricalengineeringteacherwhileweavingtowritetheprocedureveryeasycomprehendedthePLClanguage,andalotofnon-electricityprofessionalalsoveryquicklyknowandgodeepintotothePLC.IsPLConeoftheadvantageaboveandonly,thisisalsoonepartthatthepeoplecomprehendmoreandeasily,inalotofequipments,thepeoplehavealreadynolongerhopedtoseetoomanycontrolbuttons,theydamagenotonlyandeasilyandproducetheartificialerroreasiest,smallisnotamainerrorperhapsyoucanstillaccept；Butleadevenisafatalerrorgreatlyiswhatwecantistolerantof.Newtechniquealwaysforbringingmoresafeandconvenientoperationforus,makewealotofproblemsforfaceonsweepbutlight,doyouunderstandtheHMI?SaystheHMIhereyoubasicallynotclearwhatitis,alsohavenointerestunderstanding,changeoneinsidetextexplainsitintothetouchtoholdorman-machineinterfaceyouknew,itcombineswiththePLCtoourlargerspace.HMIthecontrolnotonlyonlyisreducedthecontrolpressbutton,increasethevividofthecontrol,moremainofitiscansequenceof,andatcanthechangedatainputtooutputthefeedbackwithdata,controlinthetemperaturecurveofimitatebutalsocankeepthemanifestationofviewtocomeout.Andcanwritethefunctionhelpprocedurethroughaplaittoprovidethehelpofvariouswhatliesinonespower,theonewhomakeoperatereducestheotioseerror.CurrentlytheHMIfactoryisalsomoreandmore,thefunctionisalsomoreandmorestrong,thepriceisalsomoreandmorelow,thenoodlesoftheusagearewidemoreandmore.TheHMIforegroundcansaythatthinktobegoodvery.Atalotofsituations,thelistisisasmoothmovementthatcantguaranteetheequipmentsbythecontrolofthesinglemachine,butpasstheinformationexchangesoftheequipmentsandequipmentstoattaintheresultthatwewant.Forexampleforepackandtheexaminationoftheempressworkpreface,wewillarrivewrappinginformationfeedbacktoexaminetheplace,andexaminetheinformationoftheplacetoalsowantthefeedbacktopacking.Passtheinformationsharethustomakeboththechainconnect,becomingatotalbody,thematchofyourthatthusmakeismoreclose,ateachotherattaintoreflecttheresultthatmutuallyflick.ThePLCcorrespondencehasalreadycomemoremorebodynowitsvalue,atthePLCandcorrespondencebetweenPLC,canpassthecommunicationoftheinformationandtheshareofthedatastoguaranteethatoftheequipmentsmoderatesmutually,theresultthatarrivealreadytorepairwitheachother.DataconversiontheadoptionRS232betweenPLCconnecttocometothetransmissiondata,buttheRS232pickupapeopleandcanguarantee10metersonlyofdeliverthedistance,ifinthedistanceof1000meterswecanpasstheRS485tocarryonthecorrespondence,thelongerdistancecanpasstheMODELonlytocarryondeliver.ThePLCdatatransmissionisjusttobecalledaformtoitinapieceofandcontinuousaddressthatthedataoftheinnerpartdeliverstheotherparty,we,thePLCoftheotherpartypassestoreaddatainthewatchtocarryontheoperation.Ifthedatathatdatainthewatchisatoestablishgenerally,thatisjustthegeneraldatatransmission,forexampletodayofoilpricerise,Iwanttodeliverthepriceoftheoilpricetolosetheoilallyonboard,thatistheshareofthedata；ButtakedatainthewatchforaninstructionprocedurethatcontrolsthePLC,thathadthedifficultyverymuch,forexampleyouhavetocontrolonepedestalrobottopresstheactionworkthatyouimagine,youwilldrawupforittheformthataprocedurecombinewiththedatasendsouttopassby.Theformthatinformationtransportcontainsinglework,thehalfaworkandthedifferenceofaworks.Themeaningofthesingleworkalsoistosayboth,acansendoutonly,butacanreceiveonly,forexampleaspyhecanreceivethedesignationofthesuperioronly,butcantgivethesuperiorreply；Aworkofhalfisalso2andcancansendoutsimilartoacceptthedata,butcantsendoutandacceptatthesametime,forexamplewhenyoumakeaphonecallistocantanswerthephone,theotherpartyalso；Butwholepairworksisbothcansendoutandacceptthedata,andcansendoutandacceptatthesametime.BeliketheInternetisatypicalexample.Theprocessthatinformationtransportalsohassynchronousanddifferentstepcent:Thedatalineandtheclocklinesaresynchronouswhensynchronousmeaninglieinsendingoutthedata,isalsothedatasignalandtheclocksignalstobecarryonbytheCPUtosendoutatthesametime,thisneedstoallwantthespecializedclocksignaleachothertocarryonthetransmissionandconnecttosend,andisconstrained,thecharacteristicsofthiskindofmethodliesinitsspeedveryquick,butcorrespondworktimeoftakeuptheCPUandalsowanttobelongoppositely,atthesametimethetechniquedifficultyalsoverybig.Itsrequestliesincanthaveanerrormarginsinadatadeliver,otherwisethewholepieceaccordingtocomparetheoccurrencemistake,thisonthehardwareisabiggerdifficulty.Appliedmoreandmoreextensiveinsomeappropriativeequipments,beliketheappropriativemedicaltreatmentequipments,thenumericalsignalequipments.etc.,incomparetheonedatadeliver,itsresultisverygood.Andthedifferentstepisanapplicationthemostextensive,thisreceivebenefitinitoftechniquedifficultyisoppositeandwanttobesmall,atthesametimenotneedtopreparethespecializedclocksignal,itscharacteristicstoliein,itsdataispartition,thelong-lostsendoutandaccept,betheCPUistoobusyoftimecangrindtoastopsextowork,alsoreducedthedifficultyonthehardware,thedatathrowtoloseatthesametimeoppositewanttobelittle,wecanpasstheexaminationofthedatatoobservewhetherthedatathatwesendouthasthemistakeornot,belikestrangeaccidentallythemethod,tiredadditionandeightefficaciesmethodetc.,canusetohelpswhetherthedatathatweexaminetosendouthaveornotthemistakeoccurrence,passthefeedbacktocarryonthediscriminator.Alineoftransmissionoftheinformationcontainastringofandcombinethecentof:TheusualPLCis8machines,certainlyalsohaving16machines.Wecanbeanatthetimeofsendingoutthedataasendouttotheotherparty,alsocanbe88sendoutthedatatotheotherparty,anand8differentiationsarealsotheasthatwesaytosendoutthedataandcombinesendsoutthedata.Aspeedismoreandslowly,butaslongas2orthreelinescansolveproblem,andcanusethetelephonelinetocarryonthelongrangecontrol.Butcombinetheosculartransmissionspeedisveryquickof,itisastringofoscularof25600%,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.,beliketotostickdownwhichthebookthatweseeiswhenweopenthedoorthepageorsimplymakeamark,becausewetreatandwouldstillneedtocontinueimmediatelyafterbookofseethebehind.TheCPUalwaysdoestheaffairthatshoulddoaccordingtoourwill,butyourmistakeofgiveitanaffair,italsowouldbesametodo,thiswemustnotice.Theinterruptionisnotonlya,sometimesexistingjointlywiththehourseveralinsidebreak,breakofftohavethepreferredClass,theywillcarryouttheinterruptionofthehigherClassaccordingtopersonsrequest.Thiskindofbreaksoffthemediuminterruptiontoalsobecametobreakofftheset.TheClassthatcertainlybreakoffisrelevantaccordingtovariousresourcesofCPUwithinternalPLC,alsofollowingaheapofcapacitysizeofalsorelevantfasten.Thecontentsthatbreakoffhasalotofkinds,forexampletheexteriorbreakoff,correspondenceinofsendoutandaccepttheinterr