自动化控制系统;自动化专业英语翻译

自动化控制系统Abstract:theinformationagehigh-techtraditionalindustries,intherapiddevelopmentofmechanicalindustryautomationappearedinsomenewtechnology:themovementcontrolloopacservomotordrivetechnology,computertechnologyandprogrammablecontroller,themovementcontrolCARDS,etc.Thispaperanalyzedandsummarizedthenewtechnologyofbasicprinciple,characteristicsandapplicationstatuetc.Keywords:linearmotorservodrivetechnology,computer,programmablecontroller,motioncontrol1introductionInformationageofhigh-techflowcausedbythetraditionalindustry,theprofoundchange.Asoneofthetraditionalindustry,machineryindustryinthisnewtechnologyrevolutionandproductstructureandproductionsystemstructureisanewspecies,microelectronicstechnology,therapiddevelopmentofcomputertechnologyandinformation,intelligentmechanicaldeviceandpowerequipment,machineryindustry,combiningbeganamassivemechatronicstechnologyrevolution.Alongwiththecomputertechnology,electronicpowertechnologyandsensortechnologydevelopment,theadvancedcountriesmechtronieproductemergeinendlessly.Machinetools,automotive,instrument,electricalappliances,lightindustrialmachinetextilemachinery,packagingmachinery,printingmachinery,metallurgy,machinery,chemicalmachineryandindustrialrobots,moreattentionbyallaspectsofpeople'sliitinimprovement,improveworkefficiencyandsaveenergyandreducethematerialconsumption,strengthenthecompetitivenessofthegreataspectsplaysarole.Intherapiddevelopmentoftheelectromechanicalintegrationtechnology,motioncontroltechnologyasitskeypart,alsoanunprecedenteddevelopment,andeachmanufacturerlaunchedmotioncontrolofnewtechnology,newproduct.Thisarticlemainlyintroducedtheclosed-loopACServodrivetechnology(FullClosedServoMotor,ACdrivetechnology(go),whichLinearProgrammableController(ProgrammableControllerisComputer,thePCC)andthemovementcontrolCARDS(Board)Motionneededseveralrepresentativeofnewtechnology.2theclosed-loopacservodrivetechnologyIntherapiddevelopmentoftheelectromechanicalintegrationtechnology,motioncontroltechnologyasitskeypart,alsoanunprecedenteddevelopment,andeachmanufacturerlaunchedmotioncontrolofnewtechnology,newproduct.Thisarticlemainlyintroducedtheclosed-loopACServodrivetechnology(FullClosedServoMotor,ACdrivetechnology(go),whichLinearProgrammableController(ProgrammableControllerisComputer,thePCC)andthemovementcontrolCARDS(Board)Motionneededseveralrepresentativeofnewtechnology.Alongwiththecomputertechnology,electronicpowertechnologyandsensortechnologydevelopment,theadvancedcountriesmechtronieproductemergeinendlessly.Machinetools,automotive,instrument,electricalappliances,lightindustrialmachinetextilemachinery,packagingmachinery,printingmachinery,metallurgy,machinery,chemicalmachineryandindustrialrobots,intelligentrobotsandmanyothercategoriesproductseveryyeartherearenewdevelopments.Mechatronicstechnologyhasbeenmoreandmoreconcernedbyvariousaspects,itinimprovingpeople'slife,improveworkefficiencyandsaveenergyandreducethematerialconsumption,strengthenthecompetitivenessofthegreataspectsplaysarole.Insomeofthepositioningaccuracyandthedynamicresponseofthedemandishigher,electromechanicalproductacservosystemiswidelyused,includingdigitalacservosystemwithdigitalcontrolmodeismore,butthetrendisverysimple,debugginuseispopular.TheservodrivesystemoftheuseofadvancedDigitalSignalProcesso(DSP)DigitalSignalProcessor,tothemotorshaftback-enddepartmentofphotoelectriencoderandonlocationinthedriveandsamplingmotorbetweenthepositionandspeedclosed-loopcontrolsystem,andgivefullplaytothehighspeedDigitalSignalProces(DSP),automaticgaincontroloftheservosystem,andcanevenloadchanges,thereal-timetrackingcontrolsystem;gainSomedrivershavefastFouriertransform(FFTfunction,themeasureofGongZhenDianmechanicalequipment,andthroughanotchfiltertoeliminatemechanicalresonance.Normally,thedigitalacservosystemmostlyinhalfoftheclosed-loopcontrolwork,namelytheencoderfeedbackservomotorspeedloop,alsobeforpositionloop.Thiskindofcontrolmodefortransmissionchainofclearanceanderrorcannotovercomeorcompensation.Inordertoobtainhighercontrolprecision,shouldbeinthefinaloinstallationprecisiondetectiondevices(suchas:gratingfeet,photoelectricencoder,i.e.theclosed-loopcontrol.Comparisonofthetraditionalmethodis:theclosed-loopcontrolservosystemsonlyacceptinstruction,speedloopcontrolloopcontrolbythesuperiorpositioncontroller(mostoftheclosed-loopsystemisnc).Thisgreatlyincrethedifficultyoftheuppercontroller,servosystemislimited.Currently,foreignalappearedamoreperfect,canachievehigheraccuracyoftheclosed-loopdigitalservosystem,therealizationofhighautomationequipmentmoreeasily.Thecontrolprinciplasshowninfigure1.Thissystemhasovercomethedefectofhalfaclosed-loopcontrolsystem,servodrivecandirectsamplinginfinalmechanicalpartpositionfeedbackelement(suchasgratingfeet,magneticgridfeet,revolvingencoder,etc.),asthepositionloop,andthemotorspeedfeedbackatonlyascoder.Suchservosystemcaneliminatethemechanicaltransmissionofgeargap,gap(e.g.,etc),ballscrewclearancecompensationofmechanicaltransmissionmanufacturingerror(suchasballscrewpitcherror,etc),andrealizetheclosedlooppositioncontrolfunctions,higherprecision.Andthiswholeclosed-loopcontrolareaccomplishedbyservodrive,withoutincreasingtheburdenandsupervisorycontrollerinitsgrowingindustryautomationequipmentanddeveloped,andstartusingthiskindofservosystem.Insomeofthepositioningaccuracyandthedynamicresponseofthedemandishigher,themechtronieproductincommunicationThissystemhasovercomethedefectsoftheclosed-loopsystemandthepositionloop,samplingcandirectlyfrominfinalpositiononthemechanicalcomponents(suchagratings'feedback,magneticgateruler,revolvingencoder,etc),andthemotorspeedlatonlyasencoder,thefeedbackcaneliminateallthegapexistinginmachinery,andservosystem,butalsocanappearonthemechanicaltransmissionerrorcompensation,achieverealclosed-loopfunction,achievethehighpositioncontrol.Andthiswholeclosed-loopcontrolareaccomplishedbydrive,withoutincreasingtheburdenofsupervisorycontroller.Owingtotheclosed-loopacservosystemcangethighprecision,anddoesnotneedtoincreasethecomplexityofsupervisorycontrolsystem.Soitiswidelyusedinncmachitools,precisionCNCequipmentdesign,etc.Thissystemhasovercomethedefectofhalfaclosed-loopcontrolsystem,servodrivecandirectsamplinginfinalmechanicalpartpositionfeedbackelement(suchasgratingfeet,magneticgridfeet,revolvingencoder,etc.),asthepositionloop,andthemotorspeedfeedbackatonlyascoder.Suchservosystemcaneliminatethemechanicaltransmissionofgeargap,gap(e.g.,etc),ballscrewclearancecompensationofmechanicaltransmissionmanufacturingerror(suchasballscrewpitcherror,etc),andrealizetheclosedlooppositioncontrolfunctions,higherprecision.Andthiswholeclosed-loopcontrolareaccomplishedbyservodrive,withoutincreasingtheburdenandsupervisorycontrollermoreindustryInthenumericalcontrollathe,especiallyincomputerncmachinetools,becausehasclosedservodrivesystemworkreliably,highprecisionandstronganti-interferenrelativetotheopen-loopservodrivesystemismorecommonlyused.Butduetotheincreasedclosedservodrivesystem,feedback,comparativepositiondetection,andsteintotheopenloopsystem,itsstructureismorecomplex,debuggingisrelativelymoredifficult.Aclosed-loopservodrivesystem,theactuatorAlongwiththedevelopmentofnumericalcontroltechnology,therequirementofactuatorsaresummedupandincreasinglyhigh,basicallyhavethefollowing:tominimizetherotationalinertiaofthemotor,inordertoimprovethesystemofdynamicresponse,improvemotoroverloadabilitytoadaptoftenappeartheimpactofthephenomenon,improvespeedandstabilityoperationofmotor,toensuretheuniformityofspeedservosystemaccuracy.Duetotheparticularityofmechanicalprocessing,generalmotorscannotmeetthencmachinetoolsforservocontrolrequirements.Atpresent,inthencThemachineiswidelyusedinthedcservomotorandacservomotor.1dcservomotorThedcservomotorwasusedinmachinetoolservosystemisakindofactuators.Intheservosystemusedinthedcservomotorservomotorfordcmotors,suchaslowinertiandwidespeedmotor,etc.Althoughtheseservomotor,havethefeaturesofdifferentstructure,butitsworkingprincipleanddcmotoraresimilar.lowinertiadcservomotor.Mainwhetherslotdcservomotorarmatureandothertypesofmotor.Noslotsdcservomotorarmaturetheworkingprincipleandstructureofthesamedcmotor,thedifferenceandfeaturesare:thearmaturecoreissmoothwithouttrough,thearmaturewindingcircleswithepoxyresincuringandbinderinthearmaturecoreonthesurface,thelengthanddiameterofthearmaturefivetimorethanintheair-gapsizethantheaveragedcmotoris10timesgreaterthan.Itpowerindozensofwattsto10kW.Mainlyusedforfastmovement,powersystem.widespeeddctorquemotor.Withthemotortorquemethodtoimprovetoimprovethedynamicperformance.Itsstructureandgeneraldcmotor,usuallybysimilaseparate-excitedhim.Almostallbinedwitharmaturecontrol.Ithasthefollowingfeatures:dcservomotorcontrolprincipleofpulsewidth.Thedcservomotorspeedadjustmentmethodismainlytoadjustthearmaturevoltage.Currentlythemostwidelyusedmethodsaretransistorspulsewidthomdulatros-dcmotorspeed(PWM-M).Ithasthefastresponse,highefficiency,widerangeofspeedandnoisepollutionissmall,simpleandreliable.Pulsewidthmodulator,usingthebasicworkingprincipleofswitchpowertransistor,dcvoltagemustbeconvertedintothefrequencyvoltage,addtothedcmoarmature.Througheachpulsewidthcontrol,wavethearmaturevoltagechangeofaverage,adjustthespeedofthemotor.Figure5-9-MsystemofPWMisworkingprinciplediagram.Figure5-9willsettheswitch(a)toclose,disconnectKcycle,staandshut-downcycleisT.Inaperiodoftime,thetimeforτ,disconnectforT-respectively.IfthepowersupplyvoltageUplusisconstant,addtotheelectricpowethearmaturevoltagewaveformisasquarecolumn,itsheightforU,Widthforτ,asshowninfigure5-9(b).Itistheaverage（5-2Typeinthedelta=τ/T,calledconductionrate.WhenTunchanged,aslongasthecontinuouschange,canmakethearmaturevoltageaverage(namelydccomponent)from0toU,andcontinuouschangescontinuallychangingmotorspeed.TheactualsystemwithhighPWM-MtriodeswitchK.2acservomotorAcservomotordriveisthelatestdevelopmentofnewservosystem,themachineisdrivensystemforanewtrend.ThedcmotordrivesystemZhengLiuZibrushandoftenrepair,motorandusingenvironmentsizerestrictionshortcomings.Itcanspeedinawirangeoftorque,producetheidealofsimplestructure,reliableoperation,usedfornumericalcontrolmachinetool,todrivesystemforprecisionintopositioncontrol.Theworkingprincipleofacservomotorwithtwophaseasynchronousmotorissimilar.However,duetoitinthencmachinetoolsasactuators,acsignalconversiontheangularvelocityorontherotorspeedrequirements,sohowcanreflectthecontrolsignalphase,itisnotturningcontrolsignals.Especiallywhenithasinturn,ifcontrolsignalsdisappear,itimmediatelystopturning.Butordinaryinductionmotorsturn,ifcontrolsignaltodisappear,itoftencan'tstopimmediatelyandwillcontinuetoroll.Alsobyacservomotorstatorandrotor.Thestatorwindingsandcontrolwindingiexcitation,thedifferenceinthespaceoftwowindingelectricity.IfthetwoAngleof90°phasewindingsinamplitudeandphaseequal90Angleoftheelectricmotoronvoltage,°thesymmetryofairgapinthecircularrotatingmagneticfield.Iftwovoltageamplitrangefor90°orphaseAngleofelectric,magneticfieldsproducedbyarotatingmagnetioval.Addinthecontrolsignalisdifferent,thewindingmagneticfieldgeneratedbyellipseisdifferentalso.Forexample,loadtorquemustchangecontrolsignals,andcanchangetheellipse,magneticcontrolservomotorspeed.Acservomotorcontrolmodehas3kinds:amplitudeandphasecontrolamplitudeandphasehybridcontrol3linearmotordrivetechnologyGeneralmotorsisturningtowork.Butwithrotatingmotordrivetraffictools(suaselectriclocomotiveandcityinthetrolley,etc)needtodowithrotatinglinearmofthemotordrivingmachinepartsalsoshouldmakelinearmotion.Thiswillneedtoincreasetherotationmovementintoasetoflinearmotioncandirectlyusedevice.Tmotortodrivestraightmovement,eliminatingthissuit?Severaldecadesago,peoplepforwardthisproblem.Nowhasmadeastraight-linemovementofthemotor,linearmotor.Linearmotorprincipleisnotcomplicated.Imagineaninductionmotorrotatealongthemovementdirectionoftheradiusandflatteningdividing,itbecamealinearinductmotor(chart)inthelinearmotor,equivalenttorotatethemotorstator,calledprimaryequivalentofmotorrotorspinning,subprime.Primaryzhongtongtoexchange,subprimeonelectromagneticforceundertheactionoflinearmotionalongtheprimarydo.Thenprimarydoverylong,extendstothemovementoftheneedtoachieve,butdoesnotneedsolongsubprime.Actually,linearmotorcanregardprimarydoverylong,alsocanmakelong;secondaryCanbothprimaryandsecondarymobile,fixedfixed,juniorsecondaryalsocanmove.Linearmotorisanewkindofmotor,inrecentyears,wideapplication.Maglevtraiisdrivenbymotor.Maglevtrainisakindofbrand-new.Generally,becausethetrainwheelandrail,limitthefrictionbetweenthespeedincrease,itcanreachthehighestspeedthan300kmmaglevtrain,withmagneticsuspensionistotrainandguide,byreducingfriction,fcontact,improvespeed.Bythelinearmotortraintraction.Linearmotorinthegroundlevel,afixedextendsfartoguidetogether,Anotherlevelinstallationonthetraintoexchangelinks.Primary,traintheguide.Trainisequippedwithmagnets(somefat&oilinearmotorcoilmagnet),withthetrainwhenmotion,makeinthegroundwire(ormetaplatesinducedcurrentinthemagneticinductioncurrent,andtrainsthemagnet(orcoftheelectromagneticforcebetweenthetrainissuspended.Theadvantagesofsuspensiontrainsisrunningsmoothly,noturbulence,lownoise,small,aslongasthetractionforthousandsofpowercanmakekwsuspensionspeedoftrainsto550km/h.suspensiontrainsdeceleration,magneticfieldchanges,alsoreduced,magneticinducticurrentabate,causinglevitationforcetrainsweresuspended.Equippedwithawheeldevice,it'slikeaircraftwheel,intheprocession,timelyincomecantrainstopsdosupportthetrain.Tomakethequalityofthehugemagneticlevitationtrainon,needstrongmagneticfield,thepracticalneedwithHTSwindingssuchstrongmagneticfield.Linearmotorexceptformaglevtrain,alsowidelyusedinotheraspects,suchassystem,electricalQiChui,electromagneticmixeretc.InChina,thelinearmotorisagraduallygetpromotionandapplicationoftheprincipleoflinearmotor.Thoughnotcomplicated,butinthedesignandmanufacturinghasitsowncharacteristics,theproduisstillnotmature,motorthatfurtherresearchandimprovement.Linearmotorservosystemintheapplicationintheworld,inrecentyearshasalgetattention,machinetoolindustryinwesternindustrializedregionanda"hot"linearmotor.Themachineadoptsfeedingsystem,inlinewiththedirectdrivemotorrotatemotordrivethebiggestdifferenceiscancelledfrommotortoworkbench(draggingplate)betweenmechanicaltransmissionlink,themachineintothelengthofthetransmissionchaintozero,thetransmissionwayhasbeencalledthe"zerotransmission".Becausethis"zero"manner,drivingtherotatingmotordrivingmodecanachieveperformanceindexandadvantages.1.thehighresponsesystemdirectlycancelledduetosomeoftheresponsetimeconstantofmechanicaltransmissionparts(suchasballscrew,etc.),makewholeclosed-loopcontrolsystemdynamicperformancegreatlyimprovesensitivereaction.2precisionlineardrivesystemcancelledduetotheballscrewtransmissionmechanismofsucherrorsandreducethegapandtheinterpolationoftransmissionsystemlagsmovementofthetrackingerror.ThroughthelinepositiondetectionIn1987theInternationalelectrotechnicalcommission(Electrical)issuedbytheInternationalaidofPLCinthedraftstandardsPLCmadebelowdefinition:"PLCisaspecializedinindustrialenvironmentdesignandapplicationoftheelectronicdevicedigitalcomputingoperations.Itcanbeusedforthestorage,programminginitsinternallogicoperationsequenceexecution,storage,timing,countingandarithmeticoperationinstruction,andthroughdigitaloranaloginputandoutput,thecontrolofvarioustypesofmachineryorproductionprocess.PLCandrelatedperipheralequipmentshouldbeeasyandindustrialcontrolsystemaccordingtoformawhole,easytoexpanditsfunctionalprincipleanddesign.ThecharacteristicsofPLC(1),highreliabilityandanti-interferenceabilityThetraditionalrelaycontrolsystemUSESalotoftimerelay,middlerelays.Thepoor,easycontactfaultoccurs.InsteadofusingthesoftwareofPLCrelayandtimerelay,betweenleftandtheinputandoutputoftherelatedhardware,canreduceaconnectiontotherelaycontrolsystemof1/10~1/100,becauseofthefailurecausedbypoorcontactpointisgreatlyreduced.Highreliabilityisthekeyperformanceofelectricalcontrolequipment.PLCwithmodernlargescaleintegratedcircuittechnology,adoptingstrictproductionprocessmanufacturing,internalcircuitadoptedadvancedanti-interferencetechniques,andhashighreliability.SuchasmitsubishicompanyproductionofFseriesPLCMTBF$30millionhours.SomeuseredundancyCPUPLCistheaveragetimelongertrouble-free.ThemachinefromPLC,usingPLCcircuitcontrolsystem,andthesameformofrelaycontactsystem,electricalwiringandcomparedtoswitchcontactshaveonehundredsandeventhousandsoffaultisgreatlyreduced.Inaddition,PLChardwaremalfunctionwithfunction,malfunctioncantimelywarningmessage.Insoftwareapplications,userscanalsointoouterdeviceoffaultdiagnosisprocedure,makesysteminadditiontothecircuitandequipmentoutsidePLCforfaultdiagnosis.So,thesystemhashighreliability,Iwouldn'tbesurprised.(2),hardware,completefunctions,applicabilityPLCtotoday,hasformedalarge,mediumandsmallscaleofvariousseriesofproducts,andstandardizationandserialization,modular,equippedwithcompletevarietiesofvarioushardwaredevicefortheuserchooses,userscaneasilyforthesystemconfiguration,functions,differentdimensionsofdifferentcomponentsofthesystem.PLCinstallationwiringveryconvenientalso,generaluseterminalswiringconnections.PLChavestrongabilitytoload,withdirectdrivegeneralsolenoidandaccontactor,canbeusedinallkindsofindustrialcontrol.Besideslogicfunction,mostmodernPLChasperfectdataoperationability,canbeappliedtovariousdigitalcontrolfield.Inrecentyears,thefunctionofPLC,unitofPLCtocontrol,temperaturecontrol,thepositionofvariousindustrialcontrolofCNCsystem.ToenhancethecapabilityofcommunicationwithPLCandHMItechnologydevelopment,theuseofPLCcontrolsystemcomposedofveryeasily.(3),easytouse,deeplyengineeringandtechnicalpersonnelPLCasgeneralindustrialcontrollingcomputer,isfacingtheindustrialequipmentminingenterprises.Itiseasytointerface,programminglanguageforengineeringandtechnicalpersonnel.Ladderdiagramlanguagesymbolsandexpressionwayandrelaydiagram,usePLCtocontrolthesmallquantityofswitchlogiccanbeeasilyrealizeddirectivefunctionofcircuitrelay.Fornotfamiliarwithelectroniccircuit,don'tunderstandcomputerprincipleandassemblylanguageusedinindustrialcontrolcomputeropens.(4),systemdesign,installation,debuggingandmaintenanceconvenience,smallamounttoreformPLCladder-diagramproceduresgenerallyUSESsequencecontroldesignmethod.Thiskindofprogrammingmethodisveryregular,iseasytolearn.Forcomplexcontrolsystem,thedesignoftheladderdiagramdesignrelaysystemdiagramthanmuchlesstime.PLClogicalconnectionwithinsteadofstoringlogic,greatlyreducethecontrolequipmentofexternalcontrolsystemdesign,constructionandthecycleismuchshorter,whilemaintainingalsobecomeseasier.Moreimportantisthatthesameequipmentafterchangingprocesschangeprocessbecomespossible.Itisverysuitableforvariety,smallbatchproduction.(5),smallvolume,lightweight,lowenergyconsumptionForexample,ultra-smallPLCtoproducenewvarietiesofbottom,isonly100mmissmallerthanthesizeofafewrelays,sowillswitchtosmaller1/2-10.Itweighslessthan150g,onlyafewconsumption.Duetothesmallsizeeasilyloadedmachinery,istheidealcontrolelectromechanicalequipment.PLCapplicationfieldsAtpresent,hasbeenwidelyappliedinPLCsteel,petroleum,chemicalindustry,electricpower,buildingmaterials,machinerymanufacturing,automotive,textile,transportation,environmentalprotection,andculturalentertainmentindustries,usinggeneralcanbesummedupasfollowsseveraltypes.(1),thelogiccontrolswitchquantityThisisthemostfundamentalandmostextensivePLCapplicationdomain,itisreplacingthetraditionalrelaycircuit,realizelogiccontrol,sequencecontrol,whichcanbeusedforthecontrolofasingledevice,canalsobeusedtocontrolandautomationlinemoremachines.Suchasinjectionmoldingmachine,printingmachine,astapler,combinationmachinetools,grindingspurt,packagingproductionline,electroplatinglineetc.(2),analogcontrolInindustrialproductionprocess,therearemanychanges,suchastemperature,pressure,andflow,liquidlevelandspeedaresimulated.InordertomaketheprogrammablecontrollerprocessingAnalog,mustrealizeAnalog/DigitalandAnalogtoproducestats()()ofDigitalbetweentheA/DconversionandD/Atransformation.PLCmanufacturerproductionsupportingtheA/DandD/Aconversionmodule,maketheprogrammablecontrollerforanalogcontrol.(3),motioncontrolPLCcanbeusedincircularmotionorlinearmotioncontrol.Fromcontrolconfiguration,earlydirectlytoswitchI/Omodulesconnectedpositionsensorandactuator,nowgenerallyusespecialmovementcontrolmodule.Ifcandrivesteppingmotorservomotorortheuniaxialormulti-axispositioncontrolmodule.TheworldofmajorPLCcontrolfunctionsarealmost,widelyusedinallkindsofmachinery,machinetool,robots,elevator,etc.(4),processcontrolReferstotheprocesscontroloftemperature,pressure,andflowrateanalogclosed-loopcontrol.Asindustrialcontrollingcomputer,PLCcanprepareallkindsofcontrolalgorithmprocedures,completeclosed-loopcontrol.ThePIDclosed-loopcontrolsystemisusuallyUSESmoreradjustmentmethods.Therearelargeandmedium-sizedPLC,manysmallPIDmodulehasthefunctionofPLCmodule.PIDprocessingisgenerallyrunspecialPIDsubroutines.Processcontrolinmetallurgy,chemical,heattreatment,sothereiswidelyused.(5),dataprocessingModernmathematicshasPLC(includingmatrixcomputation,function,logicoperation),datatransfer,datatransformation,sorting,table,aoperationandsoonthefunction,cancompletedatacollection,analysisandprocessing.Thesedatacanbestoredinthememoryandcomparison,theaccomplishmentofacertainreferencecontroloperation,alsocanusecommunicationfunctiontootherintelligentdevice,orwilltheyprintTAB.Commonlyusedfordataprocessing,suchasnolarge-scalecontrolsystemcontroloftheflexiblemanufacturingsystems,Canalsobeusedtoprocesscontrolsystems,suchaspapermaking,metallurgy,foodindustryinsomelargecontrolsystem.(6),communicationsandnetworkingPLCcommunicationcontainsPLCcommunicationandPLCandotherintelligentdevicecommunications.Alongwiththedevelopmentofcomputercontrol,factoryautomationnetworkdevelopmentquickly,thePLCmanufacturerattachgreatimportancetothePLChavetheircommunicationfunction,thenetworksystem.ThePLChavethecommunicationinterface,thecommunicationisveryconvenient.PLCandstatusThefirstPLCisin1969,theequipmentCo.,LTD.(DEC).Limitationoftimeandthedevelopmentlevelofcomputercomponentsconditionsofearly,mainlybydivisionelementandPLCandscaleintegratedcircuit,cancompletesimplelogiccontrolandtiming,countfunction.Intheearly1970sappearedmicroprocessors.Soon,peoplewillintroducethePLCprogrammablecontroller,increasedcomputing,datatransmissionandprocessingfunction,finishedwithcomputercharacteristicsofrealindustrialcontroldevice.Inordertofacilitatethefamiliarrelays,systemofengineeringandtechnicalpersonnel,byusingtheprogrammablecontrollerandrelaydiagramsimilarladder-diagramprogramminglanguages,asthemaincomputingandprocessingandwilltakethecomputerstoragecomponentstorelayname.ThisisthecomputertechnologyandPLCcontrolrelaycombinationofconcept.Inthe1970s,programmablecontrollerZhongMoQiintopracticaldevelopmentphase,thecomputertechnologyhasbeenintroducingprogrammablecontroller,itsfunctionintheleap.Higherspeed,ultra-smallsizeandmorereliableindustrialanti-interferencedesign,analogcomputation,highratioofPIDandlaiditonthestatusofmodernindustry.Inthe1980s,theprogrammablecontrollerinadvancedindustrialcountrieshasobtainedthewidespreadapplic