2023年全國碩士研究生考試考研英語一試題真題（含答案詳解+作文范文）_第1頁
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1、附錄A：英文原文EditablecontrollerWinCC1PLCdesigncriteriaAsystematicapproachtodesigningPLCsoftwarecanovercomedeficienciesinthetraditionalwayofprogrammingmanufacturingcontrolsystemscanhavewideramificationsinseveralindustrialappli

2、cations.Automationcontrolsystemsaremodeledbyfmallanguagesequivalentlybystatemachines.Fmalrepresentationsprovideahighleveldeionofthebehaviofthesystemtobecontrolled.Statemachinescanbeanalyticallyevaluatedastowhethernotthey

3、meetthedesiredgoals.Secondlyastatemachinedeionprovidesastructuredrepresentationtoconveythelogicalrequirementsconstraintssuchasdetailedsafetyrules.Thirdlywelldefinedcontrolsystemsdesignoutcomesareconducivetoautomaticcodeg

4、enerationAnabilitytoproducecontrolsoftwareexecutableoncommercialdistinctlogiccontrollerscanreduceprogrammingleadtimelabcost.Inparticularthethesisisrelevantwithrespecttothefollowingaspects.Inmodernmanufacturingsystemsarea

5、cterizedbyproductprocessinnovationbecomecustomerdriventhushavetorespondquicklytochangingsystemrequirements.Amajchallengeistherefetoprovideenablingtechnologiesthatcaneconomicallyreconfigureautomationcontrolsystemsinrespon

6、setochangingneedsnewopptunities.Designoperationalknowledgecanbereusedinrealtimetherefegivingasignificantcompetitiveedgeinindustrialpractice.Studieshaveshownthatprogrammingmethodologiesinautomationsystemshavenotbeenableto

7、matchrapidincreaseinuseofcomputingresources.FinstancetheprogrammingofPLCsstillreliesonaconventionalprogrammingstylewithladderlogicdiagrams.Asaresultthedelaysresourcesinprogrammingareamajstumblingstoneftheprogressofmanufa

8、cturingindustry.Testingdebuggingmayconsumeover50%ofthemanpowerallocatedfthePLCprogramdesign.Stards[IEC608481999IEC6113131993IEC614991998ISO1574511999]havebeenfmedtofixdisseminatestateoftheartdesignmethodsbuttheynmallycan

9、notparticipateinadvancingtheknowledgeofefficientprogramsystemdesign.designprocessisnmallyseparatedintoacomponentdesignasystemdesignstage.Atcomponentdesignstagesinglefunctionsaredesignedverified.Atsystemdesignstagecompone

10、ntsareaggregatedthewholesystembehavifunctionalityistestedthroughsimulation.Ingeneralacompleteverificationisimpossible.HenceasystematicapproachasexemplifiedfthePLCprogramdesignmayimpactthelogicalhardwaredesign.2SIEMENSPLC

11、SIMATICS7300seriesPLCappliedtoallwalksoflifevariousoccasionsinthedetectionmonitingcontrolofautomationitspowertoboththeindependentoperationofconnectedtoawkabletoachievecomplexcontrol.Thephotoelectricproductswithisolationh

12、ighelectromagiccompatibilityhavehighindustrialapplicabilityallowingtheambienttemperatureof60℃hasstrongantijammingantivibrationimpactresistancesoinaharshwkingenvironmenthasbeenwidelyApplications.Ialsomeanfreedomofcommunic

13、ationS7300typePLCsaveryuniquefeaturewhichallowsS7300PLCcandealopenlywithanyothercommunicationsequipmentcommunicationscontrollerPLCS7300typecanbedefinedbytheusersownCommunicationsprotocol(oftheagreementII)thebaudrateto1.5

14、Mbits(adjustable).Sothatcangreatlyincreasethescopeofcommunicationssothatthecontrolsystemconfigurationmeflexibleconvenient.Ofanykindwithaserialinterfaceperipheralssuchas:printersbarcodereadersDrivesamodem(Modem)thetopPCco

15、nnectedsocanbeused.Userscanprogramtodevelopcommunicationprotocolstheexchangeofdata(fexample:IIactercode)RS232interfaceswiththeequipmentcanalsobeusedPCPPIcablelinkingthefreecommunicationcommunications.WhenthePCofflineunde

16、rthecontrolofthenextcrewthewholesystemcanoperatenmally.PCthatisbycontrolcentremainlybythePClaserprintercomponentsusingSIMATICWINCCsoftwareplatfmtheallChineseinterfacefriendlymanmachinedialogue.Managersoperatscanbeobserve

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