變頻技術(shù)應(yīng)用plc可編程控制器外文文獻(xiàn)翻譯、中英文翻譯、外文翻譯

變頻技術(shù)應(yīng)用在工業(yè)現(xiàn)場控制領(lǐng)域，可編程控制器一直起著重要的作用。隨著國在供水行業(yè)應(yīng)用逐步增多。觸摸屏與PLC配套使用，使得PLC的應(yīng)用更加靈活，同時可以設(shè)置參數(shù)、顯示數(shù)據(jù)、以動畫等形勢描繪自動化過程，使得PLCPLC連接的觸摸屏，可以使控制更加直觀，操作更加簡單、方便。組合應(yīng)用PLC1；它主要由PLC4～20mA0～10V標(biāo)PLCPIDPID運算與給定壓力參數(shù)進(jìn)行比較，輸PLCI/O端口開關(guān)量的輸出來實現(xiàn)切換交流接觸1#～3#泵的啟停，該方式主要供設(shè)1#水泵變頻運行，變0HZPID后送給變頻器控制。如壓力不夠，則頻率上升到50HZ，由PLCI/O12＃泵變頻啟動；如用水量減少，PLC控制從先起的泵開始切除，同時根據(jù)PID調(diào)節(jié)參數(shù)使系統(tǒng)平穩(wěn)運行，始終保持管網(wǎng)壓力。若有電源瞬時停電的情況，則系統(tǒng)停機(jī)，待電源恢復(fù)正常后，人工啟動，系統(tǒng)自動恢復(fù)到初始狀態(tài)開始運行。變頻自動功能是該系統(tǒng)最基本的功能，系統(tǒng)自動完成對多臺泵的啟動、停止、循環(huán)變頻的全部操作過程。PLCModbus960081變頻器除設(shè)置通信參數(shù)外，還需啟用“自由停車”以保護(hù)電機(jī)。PLC通訊參數(shù)設(shè)置:TWDLCAA24DRF——硬件——端口——端口設(shè)置，端口設(shè)置中進(jìn)行端口參數(shù)設(shè)置；觸摸屏通訊參數(shù)設(shè)置：IO 管理——ModbusRTU01[COM1]——ModbusEquipment，雙擊“ModbusEquipment即可進(jìn)行通訊參數(shù)設(shè)置。TWDLCAA24DRF，I/O24點，繼電器輸出，PLCPLCPLCPIDPLC的編程指令簡單易懂且程序設(shè)計靈活，步進(jìn)計數(shù)器功能模塊從一個步移動到另一個步取決于外部或內(nèi)部事件。通過模擬輸入和輸出模塊TWAMM3HTPID2的順序切泵。2泵變頻啟動，泵的50HZ而此時水0HZ，然后22PLCI/OPLC123＃泵變頻運行來維持50HZ3＃泵切換為1123時間停水的情況發(fā)生。水壓的大范圍波動及水壓太低時的短時間缺水的現(xiàn)象，提高了供水品質(zhì)。PLC和變頻器結(jié)合，系統(tǒng)運行平穩(wěn)可靠，實現(xiàn)了真正意義上的大大提高恒壓供水系統(tǒng)的自動化水平及對現(xiàn)場設(shè)備的監(jiān)控能力。TheapplicationofexchangefrequencyIntroductionintheindustryscenecontroldomain,theprogrammablecontroller(PLC)hasbeenplayingthevitalrole.Enlargesalongwiththecountryinthewatersupplyprofession'sinvestmentefforts,thewaterworksmovementautomationenhancesunceasingly,PLCincreases graduallyin the water supply application.ThetouchscreenandthePLCnecessaryuse,causesPLCtheapplicationtobemoreflexible,simultaneouslymayestablishsituationdescriptionautomationprocessesandsoonparameter,demonstrationdata,byanimation,causesPLCtheapplicationvisualization.Thefrequencyconversionconstantpressurewatersupplybecomesthesupplyprofessionamainstream,is guaranteesthewatersupplypipenetworkintheconstantpressureimportantmeans.Themodernfrequencychangerperfectnetworkserviceproject,theprestigeelectricalmachinery'ssynchronizedmovement,thelong-distancerangecommoncontrolandtheonlinemonitoringandsoonhaveprovidedtheessentialsupport.ThroughwiththePLCconnection'stouchscreen,maycausethecontroltobemoredirect-viewing,theoperationissimplerconveniently.ThecombinationusingPLC,thetouchscreenandthefrequencychanger,usesthemailingaddresstocarryonthecontroltothefrequencychangertorealizethefrequencyconversionconstantpressurewatersupplyFrequencyconversionconstantpressurewatersupplysystemprinciplelikechart1;ItmainlybyPLC,thefrequencychanger,thetouchscreen,thepressuretransmittinginstrument,thepowerandthecontrolwiringaswellasthepumpgroupiscomposed.Theusermaythroughthetouchscreencontrolsystem'smovement,mayalsothroughthe control cubicle kneading board's on indicating lamp and the button, change-overswitchunderstandsandcontrolsystem'smovement.Throughinstallsintheoutletpipeon-linepressuretransmittinginstrument,turns4~20mAorthe0~10VstandardtheoutletpressuresignalThesignalsendsinPLCthebuilt-inPIDregulator,with assigns the pressure parameter after the PID operation to carry on comparison,theoutputmovementfrequencytothefrequencychanger.Thecontrolsystemcontrolswaterpump'srotationalspeedbythefrequencychangertoadjustthevolumeofdiversion,accordingtothewaterconsumptiondifference,thePLCfrequencyoutputassignsfrequencychanger'smovementfrequency,thusadjustswaterpump'srotationalspeed,achievestheconstantpressurewatersupply.ThePLChypothesis'sinternalprocedureactuatestheI/OportswitchquantitytoloserealizesthecutexchangetomeetTouchesthegroup,putsintotheworkcoordinatedbythewaterpumpelectricityradiostationnumber,andcompletestheelectricalmachinerytoopenstops,thefrequencyconversionandthepowerfrequencycut.Throughintheadjustment investment work's electricity radio station number and the electricalmachineryanelectricalmachinery'sfrequencyconversionrotationalspeed,causesthesystempipenetwork'sworkingpressuretostabilizethroughout,achievestheconstantpressurewatersupplythegoal.Thissystemhasmanualandtheautomatictwomovementway.Whenmanualway,throughcontrolcubicle'sonstartandthepausebuttoncontrolwaterpumpmovement,mayaccordingtoneedtocontrolthe1#~3#pumptoopenseparatelystops,thiswaymainlyfortheequipmentdebugging,automaticallyhastimethebreakdownandtheoverhauluses.Whenautomaticmovement,firstbythe1#waterpumpfrequencyconversionmovement,thefrequencychangeroutputfrequencyfromthe0HZrise,simultaneouslythePIDregulatorafterassigningthepressurecomparisonoperationgivesthereceivesignalthefrequencychangercontrol.Ifthepressureisinsufficient,thenthefrequencyrises50HZ,actuatestheI/OportswitchquantitybythePLChypothesis'sproceduretoloserealizesthecutexchangecontactdevicegroup,causesthe1#pumpfrequencyconversionrapidcutisthepowerfrequency,the2#pump frequency conversion starts, if the pressure still could not achieve thehypothesispressure,then2#Thepumpcutsthepowerfrequencybythefrequencyconversion,3#thepumpfrequencyconversionstart;IfthewaterconsumptionthePLCcontrolgetsupformerlythepumpstartstoexcise,simultaneouslycausesthesystemaccordingtothePIDadjustmentparametertomovesteadily,maintainsthepipenetworkpressurethroughout.Ifhasthepowersourceinstantpowercutsituation,thenthesystemengineoff,aftertreatingthepowersourcerestoresnormally,manuallyactuated,thesystemself-recoverytotheoriginalstatestartstomove.Thefrequencyconversionautomaticfunctionisthissystemmostbasicfunction,thesystemcompletesautomaticallytomanypump'sstarts,thestop,thecirculationfrequencyconversioncompleteoperatingprocess。Plantparameter'sestablishmentbeforecarryingonthecorrespondencemusttoPLC,thetouchscreenandfrequencychanger'scommunicationparametercarriesthecorrectestablishment.ThissystemdefinitionistheModbusagreement,thebaudrateis9600,thedatapositionis8,doesnothavetheverification,stopsthepositionis1.Frequencychangerbesidesestablishmentcorrespondenceparameter,butmustbeginusing“thefreeparking”toprotecttheelectricalmachinery.PLCcommunicationparameterestablishment:TheTWDLCAA24DRF--hardware--port-portestablishment,carriesontheportparameterestablishmentintheestablishment;Touchscreencommunicationparameterestablishment:IOsupervisor-ModbusRTU01[COM1]--ModbusEquipment,thedoubleclick“ModbusEquipment”thencarriesonthecommunicationparameterestablishmentThissystemusesShinaideTWDLCAA24DRF,I/Opointsis24spots,therelayoutputs,thePLCprogrammingusesShinaidePLCspecial-purposeprogrammingsoftwareTwidosoft,thesoftwareprovidesthecompleteprogrammingenvironment,maycarryontheoff-lineprogramming,theonlineconnectionandthedebugging.InordertoenhancetheoverallsystemTheperformance-to-priceratio,thissystemusestheprogrammablecontroller'sswitchquantityinputtolosecontrolstheelectricalmachinerytostop,theautomaticinvestment,theregularcut,watersupplypump'sfrequencyconversionandthebreakdownwarningandsoon,moreoverassignssimulated signal quantities and so on electrical machinery's rotational hypothesispressure,frequency,electriccurrent,voltagethroughPLCbuilt-inPID.Thepumpgroupcutstheschematicdrawinglikechart2,theworkingconditionsatisfies,startswhenworks,the1#pumpfrequencyconversionstarts,pump'srotational speed elevates gradually along with the frequency changer outputfrequency'srise,iffrequencychanger'sfrequencyachieves50HZ,butthistimehydraulicpressurehasnotachievedthesettingvalue,thePLCbuilt-inprogrammedcontrolcausestocutthenextworkstep,aftertimedelayperiodoftime,the1#pumprapidcuttothepowerfrequencymovement,simultaneouslyrelievesthefrequencychangermovementsignal,causesthefrequencychangerfrequencytoreduceto0HZ,thenthe2#pumpfrequencyconversionstarts,ifthepressurehadstillnotachieved,thenthe2#pumpcuttothepowerfrequency,the3#pumpfrequencyconversionstarts, maintains a pump frequency conversion movement throughout in movement,whenthepressureachievesthesettingvaluethefrequencyconversionoutputwillbe0HZ,simultaneouslyPLCjumpsthroughtheI/Oporttothenextlaborstep,byPLCdecidedthatexcisesthe1#powerfrequencypump,thistimebyapowerfrequencypumpandafrequencyconversionpumpmovement,ifthistimepressureachievesthesettingvalue,frequencychanger'slosingLeavesis0HZ,cutsthenextlaboragainstep,PLCrelievesthe2#powerfrequencypump,onlymaintainsthepipenetworkpressurebythe3#pumpfrequencyconversionmovement.Whenthedropofpressure,thefrequencychangerfrequencyclimbstothe50HZoutputsignal,afterthetimedelay,the3#pumpcutisthepowerfrequency,the1#pumpfrequencyconversionstarts,ifthepressurestilldidnotsatisfy,then1#changesthecutisthe1#labor,2#pumpfrequencyconversionmovement,ifthepressurestillcouldachieve,2# changes the cut is the 2# labor,starts 3# changes, three pumpssimultaneouslyworkguaranteethewatersupplyrequest.Suchcutprocessreducesthepumptobefrequenteffectivelystops,simultaneouslyintheactualpipenetworkmakestheresponsebeforethehydraulicpressurefluctuation, adjustsrapidlybythefrequencychanger,causesthehydraulicpressurestabletransition,thuseffectivehasavoidedthesituationoccurrencewhichthetall buildingusershorttimecutsoffthewatersupply.Formerfrequencyconversionconstantpressurewatersupplysystemwhenheightofwater,usuallyusesstopsthefrequencyconversionpump,cutsagainthefrequencychangerbythepowerfrequencymovementwayiscarryingonbyonthepowerfrequencymovementpumptheadjustment.Thiscut'swaymustbemoreadvancedthantheoreticallythedirectcutpowerfrequencyway,butiteasytocausethepumpgrouptobefrequentstops,thusreducesequipment'sservicelife.Butusesinthissystemstopsthepowerfrequencypump'smovementwaydirectly,simultaneouslyadjustsrapidlybythefrequencychanger,Wantstheparameterestablishmenttobeappropriate,thenrealizesthep