外文翻译PLC自动提高控制系统可靠性的方法.docx

外文翻译PLC自动提高控制系统可靠性的方法.docx

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外文翻译PLC自动提高控制系统可靠性的方法

PLCautomaticcontrolsystemtoimprovethereliability

1.Themainreasonsforthelowercontrolsystemreliability

AlthoughthemainreasonforthedeclineinindustrialcontrolsystemreliabilityandcontrolaircraftPLCitselfhashighreliabilityButiftheinputsignaltothePLCSwitchmistakesanalogsignallargerdeviations,OutputPLCcontrolbytheimplementingagenciesdonotrequireaction,whichwillenablecontrolofmistakesTheeconomiclossescausedirreparable.PLCwrongsignaltothesceneaffecttheimportationofthemainreasonsare:

1.Signaltransmissionlinecausedashortcircuitoropencircuit（duetomechanicalshearing,theiraginglinesconnectingdislocation）.Whenthesignaltransmissionlinefailure,thesignalcannotbetransmittedtothescenePLC,thecontrollingmistakes.2,themechanicalcontacttremble,althoughclosecontactonescene,butthatclosedseveralPLC,Althoughtheincreaseinthefiltercircuithardware,softwaredifferentialincreasedorders,butbecausePLCscancycleistooshort,itwaspossibletocount,addup.Displacementsordersmistake,errorcontrolresults.3,thetransmittersiteandswitchestheirownfault,suchascontactconnectionsandTransmittersitereflectsthenormalworkofnon-electricityorlargerdeviations.Thesesamefaultcontrolsystemwillnotfunctionproperly.Impactofimplementingagenciestoidentifytwomainreasons:

one,thecontactisnotreliableloadcontrolactionsAlthoughPLCissuedadirectaction,butdidnotrequestexecutivebodymovements.2,startinginvertercontrol,inverterownfault,noconverterrequiredtobringtheelectricalwork.3,variouselectricalvalvedidnotopenthesolenoidvalveisopened,thecustomsclearancecannotplaceAstheimplementingagencydidnotrequireactionbythePLCcontrol,thesystem'snormalwork,thesystem'sreliability.Toimprovethereliabilityoftheentirecontrolsystem,itisnecessarytoincreasetheinputsignalreliabilityandaccuracyoftheexecutivebodymovements.OtherwisePLCshouldbeabletopromptlyidentifyproblemsandsuggestwaystousesoundandlightalarmandotheroperatorsassoonaspossibletroubleshooting.Letsafe,reliableandcorrectmanner.

2.DesignedFaultAlarmSystem

Sounddesignfaultinthealarmsysteminautomaticcontrolsystemdesign,wedesignedathree-levelfaultdisplayandwarningsystem.1inthecontrolofthecontrolcabinet-levelpanelsetupwiththenormaloperationoftheequipmentandtroubleshootinginstructionslight.Whenthecorrespondinglight-normaloperationoftheequipment,theoperationoftheequipmentmalfunctionindicatorlighttothefrequencyof1Hzscintillation.Lightbulbstopreventdamagetoequipmentnotproperlyreflectthework,setupaspecializedfaultreduction/Testbuttonlights.Continuoussystemoperationanytimebymorethan3secondsthebutton,allbeaconsshouldallbrightened.If,atthistime,therearenoinstructionsonthebrightlightshowsarebad,theyshouldbereplacedafterthelightchangedbuttonsreductionuponthestateoftheoriginalworkanddisplayequipmentoperatingstatus.2-levelfaultshowlarge-screenmonitorssetupinthecentercontrolroom,equipmentfailure,writtenshowfaults,processflowdiagramcorrespondingequipmentflickeredintheincidentwillberecordedinthehistoryoffailure.Level3indicatesfaultsignalboxlocatedinthecentercontrolroom,equipmentfailure,theacousticsignalboxeswillbeused.-Alarmsuggestedstafftimefault.Atfault,thefaultwillclassifysomesystemfailuresistostoptheoperation.Butsomelittlefaultofthesystem,operatingsystemfaultzone,faultscanbeexcludedfromtheoperation.Thiswillgreatlyreducetheentiresystemtostoptherunningtimeandimprovesystemreliabilityoperatingstandards.

3.InputSignalReliability

PLCinputsignaltothescenetoimprovethereliability,itisfirstnecessarytochoosethehigherreliabilityofthetransmitter,andvariousswitches.Signaltransmissionlinestopreventshortcircuitcausedavarietyofreasons,disconnectedorhaveaccessto.Second,intheprocessofincreasingdigitalfilteringprocessandincreasethecredibilityoftheinputsignal.Designdigitalsignalfilteringmethodsareavailable,inputcontactatthesceneaftertheonetimer.Contacttimingjitterandtimebasedsystemtodeterminetheresponserate,thegeneralindozensofms.Thiscanensurestabilityinclosecontactindeed,theonlyotherresponse.AnalogfilterdesignproceduresareavailableonthespotforsamplinganalogsignalthreetimesDconversionrateandthesamplingintervalfromtheanalogsignalchangesintherate-determining.3rdsamplingdatawerestoredinthedataregisterDT10andDT11andDT12.Whenthelastoneaftertheuseofdatasampling,directdataexchange,datacomparisonofthemaximumandminimumorderremoved.ThemedianvalueofretainedasaresultofsamplingDT0werestoredinthedataregister.Inpracticalapplication,andalsotoextendthesamplingofthenumberoftoolstoachievebetterresults.ImprovethereliabilityofsignalandcanbereadintothePLCcontrolsystemusingtheirowncharacteristics,signaltodeterminetherelationshipbetweenthedegreeofcredibility.Ifforliquidlevelcontrol,knownasthesizeofthetank,thevalveopeningintothefluidandthefluidpressureisknown.changesinacertainperiodofhighlyliquidtankisknownaboutwhatextent,IfgiventimeLevelPLCgreatdifferenceinleveldataandestimates,judgmentsmaybeLevelFault,FailuretonotifythealarmsystemoperatingofficeroftheLevel.AnotherexampleistheultimateprotectionTankLevelnamely,whenheswitchestosendsignalsPLC,andthesignalisreallyreliable,intheprocessofthetanklevelwhenweturnsignalandthesignal,ifitalsolimitLevelMeterreadingspositionNotethatthesignalistrue;IfLevelMeterreadingsnotlimitlocation.Levellimitswitchisthelikelytransmissionofsignalfailureorfaultlines.Similarlyinformedbytheoperatortoaddressthealarmsystemfailure.Becauseoftheabovemethodsinthedesignprocess,greatlyimprovingthereliabilityoftheinputsignal

4.Reliabilityimplementingagencies

WhentheinputsignaltoaccuratelyPLC,PLCenforcementproceduresresultsthroughtheimplementationofregulatoryagencieson-siteinstallations,control.Howtoensurethatcontrolrequirementsbyimplementingagencies,asrequiredwhenimplementingagenciesdidnotwork,andhowdefects?

Whenweadoptthefollowingmeasures:

Supportedbythecontactorcontrolwhentostartorstopthiskindofloadcontactorcoilcontrol.contactorpullreliablestartandstopwhenitcontactsforthereleaseofreliable,itisofconcerntous.Thefollowingprocedureisdesignedtodeterminethereliabilityofcontactforaction.TheoperatingconditionsforcontactsX0,Y0forthecontrolcoiloutputX1PLCinputtobringbackthecontactAuxiliaryisalwaysopencontact,timerdevicesregularcontacttimethanactiontime.R0forthecreationofthefaultposition,saidtherewasR0toON,OFFdoneforthepolicetodealwith;R0saidnofailures.Faultwithmemoryfunction,reductionbythefailuretoremovethebuttons.Whenthevalveopenedorclosed,accordingtothevalveopening,closingtime,delaytimetosetup,Afteropeninginplaceortodelaydetectionsignalinplace,ifthesesignalsbacktothePLContimeandaccurately.NotevalvefailuremayhavedoneValveFailureAlarm.Programdesignasdescribedbelow.X2openedvalve,controlvalveY1outputtimethanregularvalveopeningtimerinplace,X3valveinplaceforthereturnsignaltothevalvefailureR1spaces.Meanwhile,theexportoftheswitcheshaveintermediaterelay.MoreimportantthantheintermediaterelaycanbeusedtocontrolthemovementsofothersupplementarycontactinformationfeedbacktothePLC.Otherstepsinthelogicofuserknowledge.Someofthefollowingsteps,infactonlyamoregeneral,youencounteraparticularapplication,itwasmodifiedoradjusted.Troubleshootingisthebesttoolyoufeelandexperience.First,thedeviceontotheprogram,andwillswitchhittingRUNposition,andthenbythefollowingsteps.1,ifthePLCtostopoutputinsomeplaceswasencouraging,thegeneralstateofthemiddle,thenyoutriggerthenextoperationofsignal（input,timer,Sichuanline,drumcontroller）.Allprogrammingwillshowthatthestateofdatawithself-similarsignal.2,iftheinputsignal,theprogrammingwillbeshownonthestateandinputLEDmodulecomparedtheresultsinconsistentinstructionsthenreplacetheinputmodule.Foundthattheexpansionintotheframeworkofanumberofmodulestobereplaced,thenyoureplacethemodule,I/Oshouldbecheckedcablesandexpanditslinks.3,andiftheinputstateoftheLEDinputmodulelineinstructions,instructionsitisnecessarytocomparewiththeLEDinputdevices（buttons,limitswitch,etc.）state.Intotwodifferentmeasuringaboutimportationofmodules,suchasarefound,theneedtoreplaceI/Odevices,fieldwiringorpower;Otherwise,theinputmoduletobereplaced.4,asisthesignallineSichuan,nooutputoroutputlinesandthestateofSichuan,Programmingmustusetoinspecttheexport-drivenlogic,andinspectionprocedureslist.Fromtheinspectionshouldbecarriedouttothelefttofindaresolutionisnotconnectedtothecontact,ifthereisnocardthatisimported,onthesecondandthirdby-stepexaminationoftheinput,solinesofSichuan,accordingtothe4thand5thfurtherinvestigation.Enableprosecutorstoidentifytheimpactoffurtherrelaylogicoperation.5,ifthesignalisthetimer,andlessthan999.9parkedinthenon-zerovalue,wi