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自动化专业本科毕业设计英文翻译学院（部）：专业班级：学生姓名：指导老师：年月日安徽理工大学毕业设计1FOREIGNLITERATUREAtpresent,themaincontrolwayinautomationfieldarerelaycontrol,microcomputercontrolandPLCcontrol.Comparedwiththerelaycontrolsystemandthemicrocomputercontrolsystem,thePLCcontrolsystemhasaseriesofadvantages,suchaslittleworkloadofdesigning,installing,wiringanddebugging,shortcycleofdevelopmentofworkingenvironmentandconvenientmaintenance.Meanwhile,therelaycontrolsystemhasalreadybeenfewusedonthemachinecontrolsystemisinferiorinabilityofanti-interference,highinrequirementofworkingenvironmentandlongindesignanddevelopingcycleofthecontrolsystem.Soitsapplicationhasbeingondefiningtrendintheautomationcontrolfieldbyyear.Theelectricalcontrolsystemofz-3040Radialarmdrillhasmanydefectssuchascomplexcircuit,highfailurerate,largemaintenanceworkload,poorreliabilityandflexibility.Thispaperintroducesthez-3040RadialarmdrillrelaycontactanalogcontrolsystemreformationwithPLCtoguaranteetherapidity,accuracyandrationalityofelectriccontrolsystem.Itsatisfiedrealproductiondemandandenhancetheeconomicbenefit.Theoriginalwasintroducedinitialcontrollerofprogrammabledistinguishingfeatureandperformance.Analysesonz-3040’sRadialarmdrilltechniquepropertyandtheworkcycledistancetravelledbyastreamofwaterbase,expoundedtheinitialcontrollerofapplicationES’ssetprogrammablecarryingonthetechnologicaltransformationsystemdesigntosuch,andfinishcomeoutthecontrolproceduretrapeziumpicture.WhatisaPLCcontrolsystem?Sincethe1960stheUnitedStatestolaunchprogrammablelogiccontroller(ProgrammableLogicController,PLC)toreplaceconventionalcontroldevicessincetherelay,PLChasbeenrapiddevelopmentinvariouspartsoftheworldhavebeenwidelyused.Atthesametime,PLC'sfunctionalsoimproved.Withcomputertechnology,signalprocessingtechnology,controltechnologynetworktechnologydevelopmentanduserdemandforcontinuousimprovement,PLCindealingwiththevolumeswitchonthebasisoftheincreaseintheamountofanalogprocessingandmotioncontrolfunctions.Today,thePLCisnolongerconfinedtothelogiccontrol,motioncontrol,processcontrolandotherfieldhasalsoplayedaveryimportantrole.Discretecontrolofthesystemasthepreferredproduct,PLCinthetwentiethcenturytothe1990sand1980s,haveachievedrapiddevelopmentintheworldofPLCtomaintain安徽理工大学毕业设计2anannualgrowthrateof20%to30%.WiththefactoryautomationandcontinuousimprovementinthePLCandmarketbaseexpansioninrecentyearsinthePLCindustryslowdowninthegrowthrateofdevelopedcountries.However,ChinaandotherdevelopingcountriesinthePLC'sgrowingveryrapidly.Comprehensiveinformation,in2004globalsalesofthePLCforabout10,000,000,000U.S.dollars,inthefieldofautomationplaysaveryimportantposition.PLCtouchbytheimitationoftheoriginalrelaycontrolprincipledevelopedinthe1970s,onlythePLClogiccontrolswitch,firstofallapplicationsintheautomotivemanufacturingindustry.Totheimplementationofitsstoreoperationslogic,theorderofcontrol,timing,countingandcomputing,andotheroperatinginstructions;anddigitalinputandoutputoperationtocontrolalltypesofmachineryandproductionprocess.ThepreparationoftheusercontrolprocedurestoexpresstheproductionprocessrequirementsandadvanceintothePLCuserprogrammemory.Run-timebystoringthecontentsonebyonetheimplementationofprocedurestocompletetheprocessrequiredtooperate.PLC'sCPUinstructionswithstep-by-stepprocesstostoretheaddressoftheprogramcounter,runningintheprocess,eachstepintheimplementationoftheautomaticcounterplus1,step-by-stepprocessfromthestart(zero-stepnumber),followedbythefinalsteptotheimplementationofthe(usuallyENDcommand),andthenreturntostartstep-by-stepcycleofoperation.EachPLCcompletedacycleofthetimerequiredfortheoperationknownasascanningcycle.DifferentmodelsofthePLC,scanningcycletocycleinamicrosecondbetweenthescoresofmicroseconds.PLCladderprogramusedincalculatinglogic,toshowtheadvantagesofquick,microsecondintheorderofmagnitude,calculatinglogic1Kprocedureslessthan1ms.Itallhaveinputasaswitchtohandlethevolume,16-bit(also32-bit)forasimulatedtraffic.PLClarge-scaleuseofaCPUtocompletethesimulationoftheamountofcomputing.TheresultssenttothePLCcontroller.ThesameI/Opointssystem,withPLCthanDCS,thecostshouldbelower(about40%oftheprovincetoaround).PLCspecialoperationdidnotstopitwithsoftwareandhardwarearecommon,somaintenancecostsmuchlowerthantheDCS.OneofthePLCcontroller,youcanreceivethousandsofI/Opoints(uptomorethan8000I/O).Iftheobjectisachainofequipment,smallloop,thePLCtoadoptmoreappropriate.AsaresultofGeneralPLCcontrolsoftwareinthedesignofmanagementinformationsystems,tobeeasier.Overthepast10years,withthePLCtolowerpricesandgrowinguserdemand,agrowingnumberofsmallandmedium-sizedequipmenttostartusingPLCcontrol,PLCinChinagrewrapidly.WithChina'srapideconomicdevelopmentandthebasisofthelevelof安徽理工大学毕业设计3automationandcontinuousimprovementinthenextperiodoftimeinthePLCwillcontinuetomaintainourgrowthmomentum.GeneralPLCcanbeusedinspecialequipmentthatitisanembeddedcontroller,butingeneraltherelativePLCandembeddedcontrollertohavehigherreliabilityandbetterstability.Practicalworkencounteredanumberofusersoftheoriginaluseofembeddedcontrollersarenowbeingusedorcustom-Gener