BTEC-B 吴简婷 Ass 1 PLC.ppt

ThepracticablereportofFXseriesPLCJiantingWuBTEC-B,Thecontentofthisreport,ThecharacteristicofFXseriesPLCTheinternalarchitectureofFXseriesPLCThePLCprincipleofworkThecharacteristicsofinputandoutputdevicesThetypesofcommunicationlinkThecomparisonofRS-232CandtheRS-422Thenetworkingmethodsandnetworkingstandardsinindustry,ThecharacteristicofFXseriesPLC,SmallvolumeHaveanadvancedandbeautifulexternalstructureProvidemuchsub-seriesforcustomerstochooseFlexiblesystemconfigurationHaveastrongfunctionandeasytouse,TheinternalarchitectureofFXseriesPLC,CPUmoduleI/OmoduleProgrammerPowersupply,CPUmoduleTheCPUmodulemainlycomposedbymicroprocessorandmemorizer.CPUmoduleiscollectinginputsignalconstantly,executetheuserprogramandrefreshthesystemsoutputsignal.I/OmoduleInputmoduleandOutputmoduleisreferredtoasI/Omodule.Inputmoduleusedtoreceiveandcollectinputsignal,switchinputmoduleusedtoreceivefromthebutton,switchselector,digitalcodeswitch,limitswitch,proximityswitch,photoelectricswitchesandpressurerelaytotheswitchinputsignal.Analoginputmoduleusedtoreceiveapotentiometer,tachogeneratorandvarietyoftransmittersanalogcurrentandvoltagesignal.Switchoutputmoduleisusuallyusedtocontrolthecontactor,electromagneticvalve,electromagneticiron,thedigitaldisplaydeviceandalarmdevicesoutputdevices.Analogoutputmoduleisusedtocontroltheregulatorandinverteretc.executivedevice.,ProgrammerProgrammerisgeneratedbytheuserprogram,toedit,inspection,modifyandmonitortheuserprogramimplementation.PowersupplyPLCisgenerallyusedDC24VpowersupplyorAC220Vpowersupply.TheswitchpowersupplyforinternalmoduleprovidesDC5V,DC12VandDC24Vpowersupplyetc.,ThePLCprincipleofwork,IntheSTOPmodeTherearetwostage,internalprocessingandcommunicationservicesIntheRUNmodeTherearehavefivestage,whichisinternalprocessing,communicationservices,inputprocessing,programexecutionandoutputprocessing.,Everytimetoscanningprocess,itwouldfocusedonsamplingtheinputsignalandrefreshingtheoutputsignal.Whentheinputportclosed,programwillontheexecutionstage,thentheinputporthaveinthenewconditionandcanberead.Onlywhentheprocessisruntothenextscan,thenewstatewillberead.Ascancycleisdividedintotheinputsample,programexecution,theoutputrefresh.Thecontentofthecomponentmappingregisterischangewiththeprogramimplementation.Thelengthofthescancycledeterminedbythesethreefactors,thespeedofCPUtoexecuteinstructions,thetimeofthedirectivetoownandthenumberofinstructions.Existinginput/outputlagphenomenon,namelytheinput/outputresponsedelay.,Thecharacteristicsofinputandoutputdevices,TheswitchinputmoduleTheswitchoutputmodule,Theswitchinputmodule,Theswitchoutputmoduleisusedtocontroltheoutputequipment,likethecontactor,thesolenoidvalve,thepilotlamp.etc.Internalcircuitletthecoilofrelayelectrify,thenthenormallyopencontactsclosed,maketheexternalloadwork.,Theswitchoutputmodule,Theswitchoutputmoduleisusedtocontroltheoutputequipment,likethecontactor,thesolenoidvalve,thepilotlamp.etc.Internalcircuitletthecoilofrelayelectrify,thenthenormallyopencontactsclosed,maketheexternalloadwork.,Thetypesofcommunicationlink,N:NNetworkLinkComputerLinkI/OLinkNocoordinationcommunication,N:NNetworkLink,N:NNetworkLinkuseofcommunicationadapterorextensionboard,achieveuptoeightFXseriesProgrammableControllerstoexchangetheinformationautomaticallybetweenthem.Dataissentautomatically,onePLCisthemainstation,andtheotherisslavestation.Therearethreemodesoftherangeofsharingdata,mode0shareseachPLCfor4dataregister,thetimeofcommunicationisrelatetothenumberofsites,is18ms65ms;mode2shareseachPLCfor4dataregisterand32pointsauxiliaryrelay,thetimeofcommunicationis22ms82ms;mode3shareseachPLCfor8dataregisterand64pointsauxiliaryrelay,thetimeofcommunicationis34ms131ms.,ComputerLink,ThecommunicationofComputerLinkissimilartotheASCIImodeofMODBUScommunicationprotocol,byusingthecommunicationprotocol,issuedbythecomputertoreadandwritedataofPLCcommandframe,Afterreceivethat,PLCgenerateautomaticallyandbacktoresponseframe,butthecomputerstillneedtobewrittenbytheuser.ComputerLinkcanbeusedforacomputerandPLCwithRS-232Ccommunicationinterfacetocommunicate,computerscancommunicateviaRS-485networkswithupto16PLCcommunications,thecomputercanalsobyRS-485communicationnetworkandatmost16setofPLCtocommunicate.ItisneedtouseFX-485PC-IFconvertertoconnecttheRS-485networkandtheRS-232Ccommunicationinterface.,I/OLink,TheCPUneartheI/OcalledlocalI/O,awayfromtheCPUunitofI/OcalledremoteI/O.FX2NseriesProgrammableControllercanuseFX2N-16LNK-MMELSECI/Otolinkthemainmode,useTwisted-pairtoconnectwith16remoteI/Ostation.Thenetworklengthis200m,supportsupto128points,therefreshtimeofI/Opointsisabout5.4msandthetransmissionefficiencyis38400bit/s.,Nocoordinationcommunication,CommunicationcanbeachievedthecommunicationbetweenthePLCandavarietyofdeviceswithRS-232Cinterface,thecommunicationcanusetheRSinstructiontoachieved.,Thelinkhadchosenforsysteminthereform,Theadvantageofcomputerlink:WiththePCforPCconstitute,singleormultiplePLCforthedistributionsystemofsmall,canusePCachieveoperationalstationfunction.InPLCapplicationsystem,developedthePCtosimpleworkstationsorindustrialterminal,canachieveconcentrationshowsandconcentratedalarmfunction.ThePCintothedevelopmentofPLCprogrammableterminal,throughtheprogramminginterfacetoaccessPLC,toprogramming,commissioningandmonitoring.DevelopmentofthePCintoagatewaydevice,tocarryonprotocolconversion,enablingPLCinterconnectionwithothercomputernetworks.,ThecomparisonofRS-232CandtheRS-422,Thenetworkingmethodsandnetworkingstandardsinindustry,ThenetworkingmethodUsingtheserialcommunicationinterfaceUsingthefieldbusUsingthethree-layernetworkstructureThenetworkingstandardsinindustryTheEthernetTheCC-linkTheDeviceNetTheProfibus,Thenetworkingmethod,UsingtheserialcommunicationinterfacetoachievedFortheminimumsystems,usetheserialcommunicationinterface,suchasRS-232C,RS-422andRS-485,toachievethecommunicationwithPLC,computerandotherdevices.UsingthefieldbustoachievedForthesmallersystems,usethefieldbus,likeCANbus,DeviceNet,AS-iandsoon.Usingthethree-layernetworkstructuretoachievedItisforthelargesystems,thehighestlevelistheEthernet,andthesecondlayerisprovidedbythePLCmanufacturercommunicationnetworksorfieldbus,forexample,theSiemensProfibus,theRockwellControlNet,andtheMitsubishiCC-link.Thebottomisthefieldbus.,Thenetworkingstandardsinindustry,TheCC-link,CC-linkisControl&CommunicationLink(controlandcommunicationLinksystem),inNovember1996,dominatedbyMitsubishiElectricCompanies,itsrapidgrowthinAsia,havealargeshareinEuropeandNorthAmerica,thecurrentrapiddevelopment.Inthesystem,itcancontrolandinformationdatacanbesimultaneously10Mbit/shigh-speednetworkissenttothescene,withexcellentperformance,simpletouse,wideapplication,savecosts,etc.Itnotonlysolvedtheproblemofcomplexindustrialsitelayout,andalsohasexcellentfunctionofnoiseandcompatibility.CC-linkisanequipmentofnetworklayer,alsocancoverthehigherlevelcontrollayerandthelowerlevelsensorlayerCC-linkmaximumtransmissionrateis10Mbit/sandthelongestdistanceis1200meters.Moduleuseslightisolation,eightinputandoutputpoints.,TheDeviceNet,Thisisalowcostandhighreliabilitylow-endnetworksystem.ADeviceNetnetworkoperatingin125k,250kand500kbaudratecansupportupto64nodes.Devicecanuseitsownpower,orbyDeviceNetbus.IntheDeviceNetnetwork,networkmanagementfunctionspresentineveryseparatenode,sothateachnodecanmonitortheothernodes.,TheProfibus,Profibusisakindofinternationalization,openanddontdependonfieldbusstandardsofequipmentmanufacturers.Widelyusedinmanufacturingautomation,processautomationindustryandbuilding,andotherareassuchastrafficpowerautomation.Profibusisatechnologythatworkshopforfactoryautomationmonitorandequipmentdatacommunicationwithcontroloflayerofthefieldbus.Profibuscanrealizethelayertotheworkshopofdistributeddigitalcontrolandmonitoringsitecommunicationnetwork,soastorealizeafeasiblesolutionofcomprehensiveautomationequipmentfactoryandintelligentprovide.,Thenetworkinghadchosenforsysteminthereform,TheMitsubishiCC-linkasanopenfieldbussystemisonlyoriginatedfromAsia.Intheautomobile,thepapermaking,printing,packaging,buildings,power,chemical,steelindustriesandotherindustries,theMitsubishiCC-linkgetaverywidelyuse.,TheadvantageoftheMitsubishiCC-link,CC-Linktechnologyhasbeenoptimizedforspeed,throughputandresponse.Asystemconsistingof64stationsandthousandsofinput/outputpointscanbeupdatedin4ms.Therearefivespeedoptionsavailablebasedonthelengthofwirednetworkcablerequired.Theserangefrom10Mbpsat100metersto156Kbpsat1,200meters.However,longerdistances(upto4.3Km)canbespannedata10Mbpsratebyusingopticalrepeaters.,TheadvantageoftheMitsubishiCC-link,Atthephysicallayer,CC-LinkemploysthewellknownRS-485signalingspecificationandexpandsonthisbyusingthree-conductortwistedshieldedcableandhighperformancetransceiversandlinefilters.Deviceconformancecertificationinvolvesconducted,radiatedanddirectlycoupledelectromagneticnoise.AdevicemustbeimmunetothisEMIandRFItobecertified.Intheeventthatadeviceonthenetworkstopscommunicating,CC-Linkallowscommunicationtocontinuewithallothernetworkdevices.Uponcorrectionofthefault,CC-Linkautomaticallyreturnsadisconnecteddevicetofullnetworkoperation.Anothersignificantoptiontoassur