外文翻译--PLC控制器的简介.doc
英文原文IntroductionToPLCControllersAlongwiththedevelopmentoftheages,thetechniquethatisnowadaysisalsograduallyperfect,thecompetitionplaysmorestrong;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,savingmachineseparatelysavingmachineRAMoftheproceduresavingmachineROManddates,theROMcandodepositofthedatapermanenceinthesavingmachine,butRAMonlyfortheCPUcomputesthetemporarycalculationusageofhourofbufferspace.ThePLCanti-interferenceisveryandexcellent,ourrootneednotconcernitsservicelifeandtheworksituationbad,theseallproblemshavealreadynolongerbecomethetopicthatwefail,butstaytoourisaconcerntocometointernalresourcesofmakeuseofthePLCtostrengthenthecontrolabilityoftheequipmentsforus,makeourequipmentsmoregentle.PLClanguageisnotweimagineofeditcollectedmaterialsthelanguageorlanguageofCstocarryonweavingthedistance,butthetrapezoiddiagramthattheadoptionisoriginalaftertheelectricappliancestocontrol,maketheelectricalengineeringteacherwhileweavingtowritetheprocedureveryeasycomprehendedthePLClanguage,andalotofnon-electricityprofessionalalsoveryquicklyknowandgodeepintotothePLC.PLCisoneoftheadvantageaboveandonly,thisisalsoonepartthatthepeoplecomprehendmoreandeasily,inalotofequipments,thepeoplehavealreadynolongerhopedtoseetoomanycontrolbuttons,theydamagenotonlyandeasilyandproducetheartificialerroreasiest,smallisnotamainerrorperhapsyoucanstillaccept;Butleadevenisafatalerrorgreatlyiswhatwecantistolerantof.Newtechniquealwaysforbringingmoresafeandconvenientoperationforus,makewealotofproblemsforfaceonsweepbutlight,doyouunderstandtheHMI?SaystheHMIhereyoubasicallynotclearwhatitis,alsohavenointerestunderstanding,changeoneinsidetextexplainsitintothetouchtoholdorman-machineinterfaceyouknew,anditcombineswiththePLCtoourlargerspace.HMIthecontrolnotonlyisreducedthecontrolpressbutton,increasethevividofthecontrol,moremainofitiscansequenceof,andatcanthechangedatainputtooutputthefeedbackwithdata,controlinthetemperaturecurveofimitatebutalsocankeepthemanifestationofviewtocomeout.Andcanwritethefunctionhelpprocedurethroughaplaittoprovidethehelpofvariouswhatliesinonespower,theonewhomakeoperatereducestheotioseerror.CurrentlytheHMIfactoryisalsomoreandmore,thefunctionisalsomoreandmorestrong,thepriceisalsomoreandmorelow,andthenoodlesoftheusagearewidemoreandmore.TheHMIforegroundcansaythatthink°tobegoodvery.ThePLCcorrespondencehasalreadycomemorebodynowitsvalue,atthePLCandcorrespondencebetweenPLCs,canpassthecommunicationoftheinformationandtheshareofthedatestoguaranteethatoftheequipmentsmoderatesmutually,theresultthatarrivealreadytorepairwitheachother.DataconversiontheadoptionRS232betweenPLCconnecttocometothetransmissiondata,buttheRS232pickupapeopleandcanguarantee10metersonlyofdeliverthedistance,ifinthedistanceof1000meterswecanpasstheRS485tocarryonthecorrespondence,thelongerdistancecanpasstheMODELonlytocarryondeliver.ThePLCdatatransmissionisjusttobecalledaformtoitinapieceofandcontinuousaddressthatthedataoftheinnerpartdeliverstheotherparty,we,thePLCoftheotherpartypassestoreaddatainthewatchtocarryontheoperation.Ifthedatathatdatainthewatchisatoestablishgenerally,thatisjustthegeneraldatatransmission,forexampletodayofoilpricerise,Iwanttodeliverthepriceoftheoilpricetolosetheoilallyonboard,thatistheshareofthedata;ButtakedatainthewatchforaninstructionprocedurethatcontrolsthePLC,thathadthedifficultyverymuch,forexampleyouhavetocontrolonepedestalrobottopresstheactionworkthatyouimagine,youwilldrawupforittheformthataprocedurecombinewiththedatasendsouttopassby.Alineoftransmissionoftheinformationcontainsastringofandcombinethecentof:TheusualPLCis8machines,certainlyalsohaving16machines.Wecanbeanatthetimeofsendingoutthedataasendouttotheotherparty,alsocanbe88sendoutthedatatotheotherparty,anand8differentiationsarealsotheasthatwesaytosendoutthedataandcombinesendsoutthedata.Aspeedismoreandslowly,butaslongas2orthreelinescansolveproblem,andcanusethetelephonelinetocarryonthelongrangecontrol.Butcombinetheoculartransmissionspeedisveryquickof,itisastringofocularof25600%,occupytheadvantageintheshortdistance,theinviewofthefactTTLelectricityiseven,beinglimitedbythescopeofonemetergenerally,itcombineunwellusedforthedatatransmissionofthelongpull,thusthecostistooexpensive.Whenyouarereadingthebook,youhearsomeoneknockondoor,youstoptostartupofaffair,openthedoorandcombinetocontinuewiththeonewhoknockondooradialogue,thetelephoneofthistimerang,yousignalhinttoconnectatelephone,afterconnectingthetelephonethrough,returnoverdocometogetherknockondoortohaveaconversation,afterdialoguecomplete,youcontinueagaintoseeyourbook,thiskindofcircumstancewearecalledtheinterruptiontoit,ithastheauthority,alsohavingsexofhavetheinitiative,thePLChadsuchfunction.Itscharacteristicslieinusandmaymeettheurgentlyabruptaffairsintheoperationprocessoftheequipments,wewanttostoptostartimmediatelyupofwork,thewhereaboutsmanagesthemoreimportantaffair,thiskindofcircumstanceisweusuallymeetof,PLCwhilecarryouturgentmission,totalwillkeepthecurrentappearancefirst,forexampletheaddressoftheprocedure,CPUoftiredaddthemachinedataetc.,beliketostickdownwhichthebookthatweseeiswhenweopenthedoorthepageorsimplymakeamark,becausewetreatandwouldstillneedtocontinueimmediatelyafterbookofseethebehind.TheCPUalwaysdoestheaffairthatshoulddoaccordingtoourwill,butyourmistakeofgiveitanaffair,italsowouldbesametodo,thiswemustnotice.Theinterruptionisnotonlya,sometimesexistingjointlywiththehourseveralinsidebreak,breakofftohavethepreferredClass,theywillcarryouttheinterruptionofthehigherClassaccordingtopersonsrequest.Thiskindofbreaksoffthemediuminterruptiontoalsobecametobreakofftheset.TheClassthatcertainlybreakoffisrelevantaccordingtovariousresourcesofCPUwithinternalPLC,alsofollowingaheapofcapacitysizeofalsorelevantfasten.Whenweareworkaworkpiece,givingthePLCasignal,countingPLCinnerpartthemachineadd1tocomputeusforadayofworkload,acountthemachineandcansolveprobleminbrief,certainlytheyalsocankeepthedataundertheconditionofdroppingtheelectricity,urgingthedatanottothrowtolose,thisisalsowhatwehopeearnestly.ThePLCstillhasthefunctionthatthehighclasscountsthemachine,beinguswhileacceptsomedatesofhighspeed,thehighspeedthatheresayisthedataoftheinallaspectstinysecondclass,forexamplethebarcodescannerisscanningthedatacontinuously,calculatinghigh-speedsignalofthedataprocessorDSPetc.,wewilladoptthehighclasstocountthemachinetohelpwecarryoncount.ItatthePLCcarriesouttheprocedureoncediscoverthatthehighclasscountsthemachinetoshouldofinterruption,willletgooftheworkonthehandimmediately.Thetrapezoiddiagramprocedurethatpassesbytoweavethedistanceagainexplainsthehighclassforustocarryoutproceduretocountmachinewouldautomaticperformancetoshouldofwork,thusrisetheClassthatthehighclasscountsthemachinetohighoneClass.Youheardtoomanythisphrasesperhaps:"crash",themeaningthatismostlyisaworkloadofCPUtoleadgreatly,theinternalresourcesshortageetc.thecircumstancecantresultinprocedurecirculate.ThePLCalsohasthesimilarcircumstance,thereisawatchdogWDTintheinnerpartofPLC,wecanestablishtimethataprocedureofWDTcirculate,beingtoappeartheproceduretojumptoturnthemistakeintheproceduremovementprocessortheprocedureisbusy,movementtimeoftheprocedureexceedsWDTconstitutiontime,theCPUturnbuttheWDTresettheappearance.Theprocedurerestartsthemovement,butwillnotcarryonthebreakagetotheinterruption.ThePLCdevelopmenthasalreadyenteredfornetworkagesofcorrespondencefromthemodeoftheone,andtogetherotherworkscontrolthenetplankandI/Ocardplankstocarryontheshareeasily.Astatesoftwarecanpassallsehardwireslink,moreanimationpictureofkeeptheviewtocarriesonthecontrol,andcanspasstheInternettocarryonthecontrolintheforeignland,theblast-offthatisliketheabsolutebeingboatNo.5istoadoptthiskindofwaytomakeairshipgoupthesky.Thedevelopmentofthehigherlayerneedsourcontinuousefforttoobtain.ThePLCemergencehasalreadyaffectedafewpersonsfully,wealsoobtainedmoreknowledgeandpreceptsfromthetoponeexperienceofthegeneration,comingtothecontinuousdevelopmentPLCtechnique,pushittowardhigherwavetide