PLC应用英文资料外文翻译PLC在冰蓄冷中央空调系统控制中的应用.docx

PLC应用英文资料外文翻译PLC在冰蓄冷中央空调系统控制中的应用.docx

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PLC应用英文资料外文翻译PLC在冰蓄冷中央空调系统控制中的应用

PLCintheIceStorageCentralAir-conditioning

SystemofControl

1Introduction

Icestorageair-conditioningistheCentralValleywillberedundantpowergridelectricityatnighttoformicecoldstorage,electricityconsumptionpeakduringthedaywhentheicewillmelttoprovideair-conditioningservices.AsinmostpartsofChina'selectricityatnightismuchlowerthanduringtheday,usingicecoldstoragecentralairconditioningcansignificantlyreducetheuser'soperatingcosts.

 Icestoragecentralair-conditioningsystemconfigurationofequipmentthanconventionalair-conditioningsystemtoincreasethenumberandrequireahigherdegreeofautomation,butitautomaticallytomeettherequirementsoftheair-conditionedbuildingsthroughoutthedayundertheconditionsofthedaywillbewithalltheenergyspent,thelargestAtleasttosaveoperatingcosts.

2Controlsystem.

Controlsystemfromthenextcrew（thescenecontrolworkstations）andPC（centralmanagementworkstations）,withthecrewusingprogrammablelogiccontroller（PLC）andtouchscreen,PCusingindustrial-gradecomputersandprinters,systemconfigurationnecessaryiftheannexCommunicationsequipmentinterfacecards,modems,etc.,toachievetheparametersofthestoragesystemandautomaticintelligentrun.

      Thecrewatthesceneandtouch-screensystemcancontrolparametersettingsanddata.PCremotemanagementandprinting,whichincludesthecrewandallthefeaturestouchscreen.FollowingthesystemasawholecrewoftheindustrialPLCasthecore,theautomatedcontrol.Controlequipmentanddevicesinclude:

detectionsensorcomponents,electricalvalves,converter,andsoon.

2.1Underthemachinesystem（Regionalworkstations）

2.1.1TP21touch-screen

      TP27usedasacolortouch-screenoperationpanel,completelyreplacetheconventionalswitchbutton,light,andotherdevicestocontrolmoreinterviewscountersclean.And,TP27touchscreencanberealizedatthescenestate,systemsettings,themodelchosen,thesetofparameters,faultrecording,loadrecords,timeperiod,real-timedata,loadcurveandreportingstatistics,andotherfunctions,theChineseuserinterfaceintuitiveandfriendly.

2.1.2SIEMENSPLC

      SIMATICS7-300seriesPLCappliedtoallwalksoflifeandvariousoccasionsinthedetection,monitoringandcontrolofautomation,itspowertoboththeindependentoperationof,orconnectedtoanetworkabletoachievecomplexcontrol.

      Thephotoelectricproductswithisolation,highelectromagneticcompatibility;havehighindustrialapplicability,allowingtheambienttemperatureof60℃;hasstronganti-jammingandanti-vibrationandimpactresistance,soinaharshworkingenvironmenthasbeenwidelyApplications.

      IalsomeanfreedomofcommunicationS7-300typePLC'saveryuniquefeature,whichallowsS7-300-PLCcandealopenlywithanyothercommunicationsequipment,communicationscontroller,orPLCS7-300typecanbedefinedbytheuser'sownCommunicationsprotocol（oftheagreementASCII）,thebaudrateto1.5Mbit/s（adjustable）.Sothatcangreatlyincreasethescopeofcommunicationssothatthecontrolsystemconfigurationmoreflexibleandconvenient.Ofanykindwithaserialinterfaceperipherals,suchas:

printersorbarcodereaders,Drives,amodem（Modem）,thetopPC-connected,andsocanbeused.Userscanprogramtodevelopcommunicationprotocols,theexchangeofdata（forexample:

ASCIIcharactercode）,RS232interfaceswiththeequipmentcanalsobeusedPC/PPIcablelinkingthefreecommunicationcommunications.

     WhenthePCoffline,underthecontrolofthenextcrew,thewholesystemcanoperatenormally.

2.2ComputerSystem（centralmanagementworkstations）

2.2.1PC

     PCthatisbycontrolcentre,mainlybythePCandlaserprintercomponents,usingSIMATICWINCCsoftwareplatform,theall-Chineseinterface,friendlyman-machinedialogue.ManagersandoperatorscanbeobservedthroughaPC,showninthevariouskindsofinformationtounderstandthepresentandpasttheice-storageoperationoftheautomaticcontrolsystemandalltheparameters,andthroughthemousetoprintequipmentmanagementandimplementationtasks.

2.2.2WINCCsoftwareplatform

 WINCCsoftwareinthefieldofautomationcanbeusedforalltheoperators’controlandmonitoringtasks.Canbecontrolledintheprocessoftheeventsclearlyshow,andshowsthecurrentstatusandorderrecords,therecordeddatacanshowallorselectsummaryform,ormayberequiredforediting,printingandoutputstatementsandtrends.

 WINCCabletocontrolthecriticalsituationintheearlystagesofthereport,andthesignalcanbedisplayedonthescreen,canalsousesoundtobefelt.Itsupportedbyonlinehelpandoperationalguidelinestoeliminatefailure.WINCCaworkstationcanbedevotedtotheprocesscontroltotheprocesssothatimportantinformationnotisshielded.Software-assistedoperationstrategyensuresthattheprocesswasnotillegaltovisitandtoprovidefornon-industrialenvironmentinthewrongoperation.

WINCCisMICRSOFTWINDOWS98orWINDOWSNT4.0operatingsystem,runningonaPCobject-orientedclass32-bitapplications,OLEthroughthewindowandODBCstandardmechanism,asanidealpartnertoenterthecommunicationsworldWINDOWS,itcanbeeasilyWINCCTointegrateacompany-widedataprocessingsystem.

3Thecontroloficestoragesystem

3.1controlobjectives,scopeandmainlycontrolledequipment

 StoragecontrolsystemcontrolObjective:

Tohosttherefrigeration,icestoragedevices,plateheatexchanger,andthesystempumps,coolingtowers,pipelinecontrolvalvesystemtocontrolandadjusticestoragesystemofthestatusoftheoperationmode,inthemosteconomicalCircumstancestotheterminaltoprovideastablewatertemperature.Atthesametime,improvethelevelofautomationandimprovethemanagementefficiencyandreducemanagementlaborintensity.

Controloftheentireicestoragesystems,includingtheparametersofstate,stateandcontrolequipment,themaincontrolequipmentare:

thestatusofhostduplex,electricalvalves,coolingtowers,coolingpumps,icestoragedevices,theprimaryglycolpump,plateheatexchanger,andSub-glycolpumps.

3.2control

     Controlfeaturesincludetheentireicestoragesystemstability,economicoperationwiththefeatures.

3.2.1Conditionconversionfeature

 Accordingtotheseasonandoperationofmachinery,automaticcontrolsystemwiththefollowingconditionsconversionfeatures:

 a）duplexhoststatusatthesametimecoolingice-makingmode;b）duplexhostthestatusofaseparateice-makingmode;c）hostandthecoolingmodeoficestoragedevices;d）theice-meltingseparatecoolingmode;e）aloneforthehostColdmode.

3.2.2ThestatusofCommitment,displayandfaultalarmfunctions

      Controlsystemaccordingtothescheduleinchronologicalorder,withloadforecastingsoftware,hostandexternalcontrolrefrigerationequipmentandthenumberofstartandstopallsurveillanceequipment,workingconditionsandoperatingparameters,suchas:

-refrigerationhostCommitment,statusandfaultalarm-hostrefrigerationOperatingparameters-hostofdrycoolingprotection-hostforrefrigeration/returnwatertemperature,pressure,telemetryanddisplay;-chilledwaterpumpsstartandstop,statusandfaultalarm-glycolpumpstartandstop,statusandfaultalarm-coolingPumpCommitment,statusandfaultalarm-thepressureofthebypasswithsignificantpressuremeasurementShow-thecoolingtowerfanCommitment,statusandfaultalarm;

      Forcoolingtower/backwatertemperaturecontrolanddisplay-for/returnwatertemperature,pressureremotecontrolanddisplay-theimportandexportsideofplateheatexchangertemperaturecontrolanddisplay-intotheicestoragedevices,exportcontrolandtemperaturetelemetryShow-chilledwaterflowcontrolanddisplaybackwater-electricvalveswitch,regulatingvalveand-controlanddisplay-outdoortemperatureandhumiditycontrolanddisplaytelemetry-icestorageanddisplayofmeasurement-theendofcoolingloadcontrol.

3.2.3Datarecordingandprinting

 Controlsystemonsomepointsneedtomonitorthetrendrecordedthroughouttheyear;theentirecontrolsystemcanbeintheload（includingthebiggestdailytotalloadandfull-load）andequipmentuptimetablesandchartstorecordforusers.Allmonitoringpointsandthecalculationofthedatacanbeautomaticallyprintregularly.

3.2.4Manual/automaticconversionfeature

    Controlsystemconfigurationflexibilityofmanual/automaticconversionfeatures.

3.2.5Optimizedcontrol

 Accordingtooutdoortemperature,weather,theweathertrend,historyandotherdataautomaticallyhosttheice-meltingorpriority.Meettheloadintheend,underthepremiseofdailyEndofcoldstorage,torunaslittleaspossiblehosts.Givefullplaytoadvantagesoficecoldstoragesystem,savingoperatingcosts.

3.2.6Featuresautomaticoperation

     Fromthehostcomputersystemcanwork,accordingtoatimetablefortheautomaticice-makingandcontrolsystemoperation,thestatusofconversion,thesystemforautomaticfaultdiagnosis,andremotealarm.Touch-screendisplaysystemrunning,processes,theparametersofnodes,runningrecords,policerecords.

3.2.7Holidayssetfeatures

 Accordingtothetimetablesystemcanberunautomatically,butalsocanbepre-setholidays,icecontrolcertificatesandcertificatesoficetime,thesystemdoesnotneedtheholidayseason,whenthesupplyofplacestostopair-conditioningcooling.

3.2.8Underthecrewoperatingfunctions

Thecrewoperating