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1、ThepracticablereportofFXseriesPLCJiantingWu BTEC-BThecontentofthisreportThecharacteristicofFXseriesPLCTheinternalarchitectureofFXseriesPLCThePLCprincipleofworkThecharacteristicsofinputandoutputdevicesThetypesofcommunicationlinkThecomparisonofRS-232Cand
2、theRS-422ThenetworkingmethodsandnetworkingstandardsinindustryThecharacteristicofFXseriesPLCSmallvolumeHaveanadvancedandbeautifulexternalstructureProvidemuchsub-seriesforcustomerstochooseFlexiblesystemconfigurationHaveastrongfunctionandeasytouseTheinter
3、nalarchitectureofFXseriesPLCCPUmoduleI/OmoduleProgrammerPowersupply`CPUmoduleTheCPUmodulemainlycomposedbymicroprocessorandmemorizer.CPUmoduleiscollectinginputsignalconstantly,executetheuserprogramandrefreshthesystem’soutputsignal.I/OmoduleInputmodulean
4、dOutputmoduleisreferredtoasI/Omodule.Inputmoduleusedtoreceiveandcollectinputsignal,switchinputmoduleusedtoreceivefromthebutton,switchselector,digitalcodeswitch,limitswitch,proximityswitch,photoelectricswitchesandpressurerelaytotheswitchinputsignal.Anal
5、oginputmoduleusedtoreceiveapotentiometer,tachogeneratorandvarietyoftransmitter’sanalogcurrentandvoltagesignal.Switchoutputmoduleisusuallyusedtocontrolthecontactor,electromagneticvalve,electromagneticiron,thedigitaldisplaydeviceandalarmdevice’soutputdev
6、ices.Analogoutputmoduleisusedtocontroltheregulatorandinverteretc.executivedevice.ProgrammerProgrammerisgeneratedbytheuserprogram,toedit,inspection,modifyandmonitortheuserprogramimplementation.PowersupplyPLCisgenerallyusedDC24VpowersupplyorAC220Vpowersu
7、pply.TheswitchpowersupplyforinternalmoduleprovidesDC5V,DC±12VandDC24Vpowersupplyetc.ThePLCprincipleofworkIntheSTOPmodeTherearetwostage,internalprocessingandcommunicationservicesIntheRUNmodeTherearehavefivestage,whichisinternalprocessing,communicationse
8、rvices,inputprocessing,programexecutionandoutputprocessing.Everytimetoscanningprocess,itwouldfocusedonsamplingtheinputsignalandrefreshingtheoutputsignal.Whentheinputportclosed,programwillontheexecutionstage,thentheinputporthaveinthenewc
