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外文翻译--PLC简介.doc

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外文翻译--PLC简介.doc

6.翻译6.1外文资料PlcIntroductionProgrammablecontrolleristhefirstinthelate1960sintheUnitedStates,thencalledPlcprogrammablelogic.controller.ProgrammableLogicControllerisusedtoreplacerelays.Fortheimplementationofthelogicaljudgement,timing,sequencenumber,andothercontrolfunctions.TheconceptispresentedPlcGeneralMotorsCorporation.Plcandthebasicdesignisthecomputerfunctionalimprovements,flexible,genericandotheradvantagesandrelaycontrolsystemsimpleandeasytooperate,suchastheadvantagesofcheappricescombinedcontrollerhardwareisstandardandoverall.Accordingtothepracticalapplicationoftargetsoftwareinordertocontrolthecontentoftheuserproceduresmemorycontroller,thecontrollerandconnectingtheaccusedconvenienttarget.Inthemid1970s,thePlchasbeenwidelyusedasacentralprocessingunitmicroprocessor,importexportmoduleandtheexternalcircuitsareused,largescaleintegratedcircuitsevenwhenthePlcisnolongertheonlylogicalICjudgementfunctionsalsohavedataprocessing,PIDconditioninganddatacommunicationsfunctions.InternationalElectrotechnicalCommissionIECstandardspromulgatedprogrammablecontrollerforprogrammablecontrollerdraftmadethefollowingdefinitionprogrammablecontrollerisadigitalelectroniccomputersoperatingsystem,specificallyforapplicationsintheindustrialdesignenvironment.Itusedprogrammablememory,usedtoimplementlogicintheirinternalstorageoperations,sequencecontrol,timing,countingandarithmeticoperations,suchasoperatinginstructions,andthroughdigitalandanaloginputandoutput,thecontrolofvarioustypesofmachineryorproductionprocesses.Programmablecontrollerandrelatedperipherals,andindustrialcontrolsystemseasilylinkedtoformawhole,toexpanditsfunctionaldesign.Programmablecontrollerfortheuser,isanoncontactequipment,theprocedurescanbechangedtochangeproductionprocesses.Theprogrammablecontrollerhasbecomeapowerfultoolforfactoryautomation,widelypopularreplication.Programmablecontrollerisuserorientedindustriesdedicatedcontrolcomputer,withmanydistinctivefeatures.First,highreliability,antiinterferencecapabilitySecondprogrammingvisual,simpleThird,adaptabilitygoodFourthfunctionalimprovements,strongfunctionalinterface1.SubjectcontentandapplicationscopeThisnationalstandardspecifiesthetechnicalrequirementsandqualityrequirementsforthelifttractionmachineswithratedspeedlessthan25m/s.Thisnationalstandardisapplicabletotractionmachinesdesignedforpassengerlift,sickbedliftandfreightlift.Itsinapplicabletothetractionmachinesdesignedfordumbwaiterliftandallkindsofliftswithratedspeednotlessthan2.5m/s.Theothertractionmachinesdesignedforallkindsofliftswithratedspeednotlessthan2.5m/scanmakereferencefromthisnationalstandardforenforcement.2.NormativereferencesGB3768DeterminationofsoundpowerlevelsofnoiseSimplemethodGB7025Majorparameteroflift,versionanddimensionofcar,shaftandmachineroomGB7588SafetyRulesfortheConstructionandInstallationofLiftsGB10058SpecificationsforliftsGB10085BasicparametersofsingleenvelopingwormgearGB10089Cylindricalworm,wormwheelaccuracyGB12974GeneralTechnicalSpecificationsforACLiftMotorGB11368CleanlinessofgearassemblyGB191PackagingPictorialmarkingsforhandlingofgoods3.TerminologyRatedspeedoftractionmachineItsthelinearspeedofthepitchdiameteroftractionwheel,correspondingtotheratedspeedofcar.RatedloadoftractionmachineWhenthetractionratiois11andthebalancecoefficientis0.40,itmeanstheratedloadofthecarinthetangentialtractionofthetractionwheel.NationalStandardofthePeoplesRepublicofChinaGBT100581997SpecificationsforLiftsForewordThenationalstandardistheamendmenttotheoriginalSpecificationsforLiftsGB1005888,maincontentofwhichareasthefollowing1Inchapterwholeperformance,theregulationsofclassificationarecanceled,whichincludeaccelerationandredardedspeedofverticalvibration,accelerationandredardedspeedofhorizontalvibration,aswellasindicatorsofnoiseandlevelingaccuracy.2Forimprovingoperationefficiencyofthelifts,therequirementstoopentimeandclosetimeofpassengerliftsareaddedinthenationalstandard.3Inchapterreliability,theregulationofclassificationofreliabilityindicatoriscanceledexaminingrequeststocontrolcabinetwhichisconsideredascommoditycomponentareaddedinthenationalstandard.4InAppendixA,specificregulationsaremadetotechnicaldocumentskeptinmanufactureraftersaleoflifts.ThestandardwillreplaceGB1005888sincetheeffectivedate.AppendixAisastandardappendix.ThestandardisproposedbyMinistryofConstructionofthePeoplesRepublicofChina.ThestandardisunderthejurisdictionofChinaLiftStandardizationTechnicalCommittee.ThisstandardisdraftedbyInstituteofConstructionMechanizationofChinaAcademyofBuildingResearch,BeijingSchindlerElevatorCo.,LtdinChina,TianjinOtisElevatorCo.,LtdinChina,andGuangzhouElevatorIndustryCo.,Ltd.ThestandardismainlypreparedbyKerongPeng,GuozhenZhang,XiaohuiXiandXizhiYang.Thestandardwasfirstlyissuedin1988andfirstlyrevisedin1997.1ScopeThestandardformulatestechnicalspecificationsofpassengerliftsandfreightlifts,inspectionprovisions,indicationmarks,package,transportationandstorage.Thestandardisapplicabletopoweractuatedtractiontypeorcompulsorytypepassengerliftsandfreightliftswhoseratedspeedisnothigherthan2.5m/sThestandardisinapplicabletohydraulicliftsanddumbwaiterlifts.2NormativeReferencesThearticlesincludedinthefollowingstandardsbecomethearticlesofthenationalstandardbyquotation.Thelistededitionsareefficientwhilethestandardispublished.Allstandardswillberevised,soallpartieswhousethefollowingstandardsshouldconsiderthelatesteditionaspossible.GB282887InbatchCheckCountingSamplingProcessandSampleTablesuitableforcontinuousbatchGB75881995SafetyCodeforManufacturingandInstallationofLiftseqvEN8111985Inthiscode,Chapter1,Chapter2,Chapter3,Chapter4,Section7.2.1partial,Section8.17.1,Section9.1.2b,Section9.9.6.2partial,Section12.6partial,Section13.1.1.3,Section15.2.3.2partial,Section16.2a6partial,AppendixC,AppendixE,AppendixG,AppendixMandAppendixZAarerecommendatorytherestareobligatory.ThiscodeistherevisedversionofGB75881995SafetyRulesfortheConstructionandInstallationofLiftsequivalenttoEN8111985onthebaseofEN8111998SafetyRulesfortheConstructionandInstallationofLiftsissuedbyEuropeanCommitteeforStandardizationCEN.ThisrevisedversionisequivalenttoEN8111998inthefieldsoftechnicalcontentsandarticlenumbering.ComparedwithEN8111985,EN8111998changedhugepartsofcontents.Thenewversionincreasesplentyofnewtechnicalcontentsandnewcalculationmethod.BesidesafewpartsarechangedaccordingtotheChinseliftsituations,thisrevisedversionisbasicallycomplianttothecontentsofEN8111998.Intherevisedversion,thefollowingmajortechnicalcontentsarechanged1.GB75881995versionhasaconciseanddefiniteapplicationscope,sothisrevisedversionreservetheapplicationscopeofGB75881995.Forthepurposeofpresentingthedefiniteness,therevisedversionaddssickbedlift,deletestheapplicationscopeofEN81-11998.2.ThisrevisedversionmakesthefollowingchangesfromthequotedtermsandconditionsofEN8111998.1IftheinternationalstandardsoroverseasadvancedstandardslistedinQuotedCodesofEN8111998havealreadyequivalentlyadoptedasChinesenationalstandardsGBorindustrystandard,thenthisquotedtermsandconditionsaredirectlynamedasthecorrespondingChinesecodenumber.2ThecodenamethatisnotincludedintheQuotedCodesandmakenomentioninEN8111998hassomecontentinvolvedintheChinesecode,soitisalsolistedinthe

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