BTECB吴简婷AssPLC专业知识培训

ThepracticablereportofFXseriesPLC

JiantingWu

BTEC-B

Thecontentofthisreport

ThecharacteristicofFXseriesPLCTheinternalarchitectureofFXseries

PLCThePLCprincipleofwork

Thecharacteristicsofinputandoutputdevices

Thetypesofcommunicationlink

ThecomparisonofRS-232CandtheRS-422Thenetworkingmethodsandnetworkingstandardsinindustry

ThecharacteristicofFXseriesPLCSmallvolumeHaveanadvancedandbeautifulexternalstructureProvidemuchsub-seriesforcustomerstochoose

FlexiblesystemconfigurationHaveastrongfunctionandeasytouseTheinternalarchitectureofFXseries

PLCCPUmoduleI/OmoduleProgrammerPowersupply`CPUmodule

TheCPUmodulemainlycomposedbymicroprocessorandmemorizer.CPUmoduleiscollectinginputsignalconstantly,executetheuserprogramandrefreshthesystem’soutputsignal.I/Omodule

InputmoduleandOutputmoduleisreferredtoasI/Omodule.Inputmoduleusedtoreceiveandcollectinputsignal,switchinputmoduleusedtoreceivefromthebutton,switchselector,digitalcodeswitch,limitswitch,proximityswitch,photoelectricswitchesandpressurerelaytotheswitchinputsignal.Analoginputmoduleusedtoreceiveapotentiometer,tachogeneratorandvarietyoftransmitter’sanalogcurrentandvoltagesignal.Switchoutputmoduleisusuallyusedtocontrolthecontactor,electromagneticvalve,electromagneticiron,thedigitaldisplaydeviceandalarmdevice’soutputdevices.Analogoutputmoduleisusedtocontroltheregulatorandinverteretc.executivedevice.Programmer

Programmerisgeneratedbytheuserprogram,toedit,inspection,modifyandmonitortheuserprogramimplementation.Powersupply

PLCisgenerallyusedDC24VpowersupplyorAC220Vpowersupply.TheswitchpowersupplyforinternalmoduleprovidesDC5V,DC±12VandDC24Vpowersupplyetc.ThePLCprincipleofwork

IntheSTOPmode

Therearetwostage,internalprocessingandcommunicationservices

IntheRUNmode

Therearehavefivestage,whichisinternalprocessing,communicationservices,inputprocessing,programexecutionandoutputprocessing.Everytimetoscanningprocess,itwouldfocusedonsamplingtheinputsignalandrefreshingtheoutputsignal.Whentheinputportclosed,programwillontheexecutionstage,thentheinputporthaveinthenewconditionandcanberead.Onlywhentheprocessisruntothenextscan,thenewstatewillberead.Ascancycleisdividedintotheinputsample,programexecution,theoutputrefresh.Thecontentofthecomponentmappingregisterischangewiththeprogramimplementation.Thelengthofthescancycledeterminedbythesethreefactors,thespeedofCPUtoexecuteinstructions,thetimeofthedirectivetoownandthenumberofinstructions.Existinginput/outputlagphenomenon,namelytheinput/outputresponsedelay.Thecharacteristicsofinputandoutputdevices

TheswitchinputmoduleTheswitchoutputmoduleTheswitchinputmoduleTheswitchoutputmoduleisusedtocontroltheoutputequipment,likethecontactor,thesolenoidvalve,thepilotlamp.etc.Internalcircuitletthecoilofrelayelectrify,thenthenormallyopencontactsclosed,maketheexternalloadwork.TheswitchoutputmoduleTheswitchoutputmoduleisusedtocontroltheoutputequipment,likethecontactor,thesolenoidvalve,thepilotlamp.etc.Internalcircuitletthecoilofrelayelectrify,thenthenormallyopencontactsclosed,maketheexternalloadwork.Thetypesofcommunicationlink

N:NNetworkLinkComputerLink

I/OLinkNocoordinationcommunicationN:NNetworkLinkN:NNetworkLinkuseofcommunicationadapterorextensionboard,achieveuptoeightFXseriesProgrammableControllerstoexchangetheinformationautomaticallybetweenthem.Dataissentautomatically,onePLCisthemainstation,andtheotherisslavestation.Therearethreemodesoftherangeofsharingdata,mode0shareseachPLCfor4dataregister,thetimeofcommunicationisrelatetothenumberofsites,is18ms~65ms;mode2shareseachPLCfor4dataregisterand32pointsauxiliaryrelay,thetimeofcommunicationis22ms~82ms;mode3shareseachPLCfor8dataregisterand64pointsauxiliaryrelay,thetimeofcommunicationis34ms~131ms.Computer

Link

ThecommunicationofComputerLinkissimilartotheASCIImodeofMODBUScommunicationprotocol,byusingthecommunicationprotocol,issuedbythecomputertoreadandwritedataofPLCcommandframe,Afterreceivethat,PLCgenerateautomaticallyandbacktoresponseframe,butthecomputerstillneedtobewrittenbytheuser.ComputerLinkcanbeusedforacomputerandPLCwithRS-232Ccommunicationinterfacetocommunicate,computerscancommunicateviaRS-485networkswithupto16PLCcommunications,thecomputercanalsobyRS-485communicationnetworkandatmost16setofPLCtocommunicate.ItisneedtouseFX-485PC-IFconvertertoconnecttheRS-485networkandtheRS-232Ccommunicationinterface.I/OLinkTheCPUneartheI/OcalledlocalI/O,awayfromtheCPUunitofI/OcalledremoteI/O.FX2NseriesProgrammableControllercanuseFX2N-16LNK-MMELSECI/Otolinkthemainmode,useTwisted-pairtoconnectwith16remoteI/Ostation.Thenetworklengthis200m,supportsupto128points,therefreshtimeofI/Opointsisabout5.4msandthetransmissionefficiencyis38400bit/s.NocoordinationcommunicationCommunicationcanbeachievedthecommunicationbetweenthePLCandavarietyofdeviceswithRS-232Cinterface,thecommunicationcanusetheRSinstructiontoachieved.ThelinkhadchosenforsysteminthereformTheadvantageofcomputerlink:WiththePCforPCconstitute,singleormultiplePLCforthedistributionsystemofsmall,canusePCachieveoperationalstationfunction.InPLCapplicationsystem,developedthePCtosimpleworkstationsorindustrialterminal,canachieveconcentrationshowsandconcentratedalarmfunction.ThePCintothedevelopmentofPLCprogrammableterminal,throughtheprogramminginterfacetoaccessPLC,toprogramming,commissioningandmonitoring.DevelopmentofthePCintoagatewaydevice,tocarryonprotocolconversion,enablingPLCinterconnectionwithothercomputernetworks.ThecomparisonofRS-232CandtheRS-422SpecificationsRS-232CRS-422OperationmodeSingle-terminalDifferenceNodesOnlyonereceivenodeandonesentnodeOnereceivenodeandtensendnodesTransmissioncable50feet4000feetTransmissionrate20Kb/s10Mb/sOutputvoltage±25V-0.25V~6VDriverLoadImpedance3K~7K100Receiverinputvoltagerange±15V±10VReceiverinputresistance3K~7K4K(theminimum)ThenetworkingmethodsandnetworkingstandardsinindustryThenetworkingmethodUsingtheserialcommunicationinterfaceUsingthefieldbusUsingthethree-layernetworkstructureThenetworkingstandardsinindustryTheEthernetTheCC-linkTheDeviceNetTheProfibusThenetworkingmethodUsingtheserialcommunicationinterfacetoachievedFortheminimumsystems,usetheserialcommunicationinterface,suchasRS-232C,RS-422andRS-485,toachievethecommunicationwithPLC,computerandotherdevices.UsingthefieldbustoachievedForthesmallersystems,usethefieldbus,likeCANbus,DeviceNet,AS-iandsoon.Usingthethree-layernetworkstructuretoachievedItisforthelargesystems,thehighestlevelistheEthernet,andthesecondlayerisprovidedbythePLCmanufacturercommunicationnetworksorfieldbus,forexample,theSiemensProfibus,theRockwellControlNet,andtheMitsubishiCC-link.Thebottomisthefieldbus.ThenetworkingstandardsinindustryTheCC-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,openanddon’tdependonfieldbusstandardsofequipmentmanufacturers.Widelyusedinmanufacturingautomation,processautomationindustryandbuilding,andotherareassuchastrafficpowerautomation.Profibusisatechnologythatworkshopforfactoryautomationmonitorandequipmentdatacommunicationwithcontroloflayerofthefieldbus.Profibuscanrealizethelayertotheworkshopofdistributeddigitalcontrolandmonitoringsitecommunicationnetwork,soastorealizeafeasiblesolutionofcomprehensiveautomationequipmentfactoryandintelligentprovide.ThenetworkinghadchosenforsysteminthereformTheMitsubishiCC-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-linkAtthephysicallayer,CC-LinkemploysthewellknownRS-485signalingspecificationandexpandsonthisbyusingthree-conductortwistedshieldedcableandhighperformancetransceiversandlinefilters.Deviceconformancecertificationinvolvesconducted,radiatedanddirectlycoupledelectromagneticnoise.AdevicemustbeimmunetothisEMIandRFItobecertified.Intheeventthatadeviceonthenetworkstopscommunicating,CC-Linkallowscommunicationtocontinuewithallothernetworkdevices.Uponcorrectionofthefault,CC-Linkautomaticallyreturnsadisconnecteddevicetoful