毕业论文外文翻译-基于PLC应用的监控平台的发展

附录附录1 外文原文velntofatoringandcontrolplatformforbasedapplicationsS.'na,Sagahyroon,rayes,-i,-diIntroductionrecentgrhofnetkstechnologyandspeciallythedespreadoftheInternethavepredthedevelntofdistributedasurentsysteforavarietyofindustrialapplications.sedistributedasurentsystecanbeusedinthetoringandcontrolofvariousinstrntsinthenetk[1,2].AogrableLogicroller(iscroprocessor-basedcontrolsystemthatcanbeprogradtosense,activateandcontrolindustrialequintandthereforeincorporatesarofinput/outputternalsforinterfacingtoanindustrialprocess.Acontrolprogramstoredintheydeternestherelationshipbetentheinputsandoutputsoftheareintelligentauttionstationsthatpossesshighlyusefulanddesirablefeaturessuchas[3]:tness.ghdegreeofscalability:rnfalieshaveadespectrumoftypesthatalleasyscalabilityinfunctionalityandperfornce.ensibility:theardesignofenablestheextensionthaderangeofdigitalandanalogI/Oes.so,variousintegratedtechnologyesareavailableforvariousapplicationareas.Sophisticatedcationcapabilities:rnhavecationportsthatprovideforcentralizedordistributedconnectivity.rfuldevelntenvirnt:rnfaliesthacrossdevelntenvirntthatsupportdifferentlanguagesforprogrability,allsegraphical harreconfigurationandoffer strongdebuggingchanis.eaccesstocontrolandtorvariousdevicesinanindustrialsettingisofvaluetoengineersandauttionfacilities.rentientationsofreetorandcontrolusededicatedorbserversconnectedtotheg.1illustratesaarchitectureusedinindustry.sareconnectedtothenetkthroughaer.systemisusuallyinterfacedtothiserusingtheserialtorofibus.setypesofsystearedisadvantagedbythededicateduseofatoaccessthesystearchitecturealsodoesnotkeuseoftheadventsandstridesdeinareassuchastelcationsandbtechnology.Fig.1.basedreeaccessibility.Inrecentyearsandduetotheeverincreasingcapabilitiesofingandtheinfluxofnetkprotocolsandstandards,therehasbeenasurgeinthedesignandientationofdistributedasurentandcontrolsysteforindustrialapplications.pically,thesesystearebasedontheclientserverarchitecturelesecuringcationusingtheIPprotocol[4–6].rntheddedbserversthatprovideopenaccesstousefulrealtiinfortionanddiagnosticsthatcanbeviedviaanystandardbbrer.sreeaccessibilityprovidesseveraladvantagesoveretraditionalsolutions.exae,aproblemcaneasilybediagnosedandperhapsfixedreely;alsoengineerscanhavereeaccesstotheconfigurationtoolsandhenceallngforreeupload/downloadandconfigurabilityviatheintranetorinternet.Inthispaperlldiscussthedesignandientationofanetkedplatformforreetoringandcontrolof.platforbuiltaroundtheSiensS7seriesof.sehaveanintegratedcationprocessorthatcanbeusedtoprovideaccessibilitytotheinternet.toringandcontrolcanbeaccomplishedinaredorrelessenvirnt,viaanintranetorinternethenceprovidingforaetesolutionforthereetoringandcontrolofindustrialprocesses.llalsodiscusstheutilizationofthenetkandtheoperationofacationprotocolthatusesssagingtocateththestationsandatabaseServerintegratedththesystepaperisorganizedasfoll:inSection2describetheoverallsystemarchitecture;sectionthreeincludesadiscussionofthesoftreaspectsofthesysteSections4and5presentthecationsthodologyfolldinthisprojectandthepaperisconcludedinSection6.Systemarchitectureproposedsystemarchitectureisillustrateding.2.Fig.2.Systemarchitecturesystemconsistsofthefollngnts:SiticS7200/300systeandcationocessors().chhasanintegratedcationinterface(harreandsoftre)thatallthetocateinaorviaanetk.ientsandnistratorareconnectedtotheprocessviathenetk(orrelessly).ivilegescanbesetorresetbynistratorstoallowforortolitthevariousclients'options.AtabaseServerconnectedtotheprocessviathenetkfordataloggingandeventrecording.Avarietyofnetkoptionsincludingbasedaccessibility.systemherneteisacationprocessorfortheS7falyusedtoconnectthetothenetk.additionalcationprocessorisusedtoallowcationbetentheandthemovertheserialport(RS232).Intheproposedientation,thesystemreportsreelythestatusoftheprocesstothetabaseServer.tabaseServerrecordsthestatusoftheinti-basedtablesandperforanyrequireddataanalysis.systemalsoreceivesandexecutesndsfromnistratorsandclientstocontroltheprocess.connectivityisalsoientedtoallowusersthdifferentprivilegestoaccessthestatusofthendatoryfunctionsoftheandallowthemtocontrolthesefunctions.hernetandconnectivityoftheisientedusingtheCP343,andtheCP340cationprocessors[7].SystemsoftresientedinlyusingSiticnager[7]andJava.Siticnagerenvirntisusedforcationththesysteproposedarchitectureallforprograng,reprograng,andconfiguringthesystemreely.JavaapplicationisdevelopedusingtheS7-s(S7-icationograngInterfaces)toestablishthecationbetenthetabaseServerandstation[8].exae,usingtheses,caninstantiateobjectsthatllconnectthetabaseServertothestationbyspecifyingtheIPessandtheS7addressofthecontainedintheunit.isconnectedtotheprocesssensorsandactuatorsusingIes.tertheJavaapplicationrunningontheserversideestablishestheconnectiontousingtheS7-s,itthenusestheJavatabasectorchnology(Jtostoretheretrieveddatathatreflectsthestatusofvariousparatersinthetabasebles.JisatechnologythatallJavatoconnecttotabaseservers.ItcontainstherequiredJavalibrariesthatincludeallthenecessarythodsrequiredtoconnecttothetabaseServerandexecutestatents.overallsystemalluserstosetprocessvaluesusingtheexae,userscansetanoutput(actuateaor)orchangethevalueofaycell(ybit,byte,d,flag,etc.).systemenvirntalsoprovidesforobtainingthereadingsofinputvalues(sensors'readings)asllascapturingthestatusoftheArtplottercanbeusedtoconvertreadingsfromtheintocharts.errorreportingchanismthatprovidesnistratorsthusefuldiagnosticinfortionisalsoincludedintheeteenvirnt.Systemnistratorscanalsoquerythestatusoftheprocessusingthenetkintheformofssages.nally,theproposedsystemarchitectureisscalableththeabilitytotoraetenetkofspreadingaroundtheIntranetorInternet.Systemsoftrearchitecturesyste'softreusedinthisprojectisdividedintothreents:databasenagentsystemapplicationes(datanipulationes,cationesandmes)userinterface.g.3depictsthesyste'softrejorntsandthedirectionsofcationbetentheAdescriptionofeachntisprovidedinthefollngsubsections.Fig.3.Systemsoftrecomponents.3.1overviewofthedatabasesystemdatabase s createdusingacle 9i. It consists of a set ofinter-relatedtables.g.4illustratesthedatabasescheusedinthisk.thesakeofbrevityabriefdescriptionofeachtableisprovidedbelStationtablethatcontainstheentireinfortionassociatedththesuchasstationIPaddress,stationna,etc.nterstablethatcontainsinfortionabouteachInput, putor,ythatthesystemisusing. ntersrepresentaddressesforInput,putor,y.Antersreadingtableusedtostorethevaluesreadfromitepointedtobythevariouspointers.stableissilartoalogtablethatholdsthevariousstationsactivities.ntablecontainsalltheinfortiononsystemusers.Ankattributeindicatesthesecuritylevelforeachnistrator,suchas,inn,Supervisor,andainee.tionalinfortionincludeloginna,passd,antattributeforpassdrecovery,etc.ienttablecontainsalltheinfortionpertainingtoeachclientthatisusingthesystemsuchasuseridentification,passdandphone.andienttablesusedtosetthecorrespondingnorclienttoaspecificstationid,andpointerid.3.2.icationesseesareattheheartofthesoftrentsoftheverallsysteynagethecationbetentheuserinterfaceandtheyinitiatetheconnectiontothesystemandcontaintheneededobjectsforcation.applicationesconsistoffollngthreesubes:datanipulatione:thisehasseveralclassesthatarecalledfromthintheuserinterface()toperformvariousdatanipulationtasksthinthedatabasesuchas:insert,update,anddelete.exae,theinsertclassisresponsibleofinsertinganynewdatareceivedthroughtheuserinterface.catione:thiseconsistsofthreeclasses;theya