欧姆龙PLC串行通信

Cat.No.W336-E1-06SYSMACCS/CJSeriesCS1W-SCB21-V1/SCB41-V1SerialCommunicationsBoardsCS1W-SCU21-V1andCJ1W-SCU21-V1/SCU41-V1SerialCommunicationsUnitsSYSMACCS/CJSeriesSerialCommunicationsBoardsandSerialCommunicationsUnitsOperationManualRevisedJune2004ivvNotice:OMRONproductsaremanufacturedforuseaccordingtoproperproceduresbyaqualifiedoperatorandonlyforthepurposesdescribedinthismanual.Thefollowingconventionsareusedtoindicateandclassifyprecautionsinthismanual.Alwaysheedtheinformationprovidedwiththem.Failuretoheedprecautionscanresultininjurytopeopleordam-agetoproperty.!DANGERIndicatesanimminentlyhazardoussituationwhich,ifnotavoided,willresultindeathorseriousinjury.!WARNINGIndicatesapotentiallyhazardoussituationwhich,ifnotavoided,couldresultindeathorseriousinjury.!CautionIndicatesapotentiallyhazardoussituationwhich,ifnotavoided,mayresultinminorormoderateinjury,orpropertydamage.OMRONProductReferencesAllOMRONproductsarecapitalizedinthismanual.Theword“Unit”isalsocapitalizedwhenitreferstoanOMRONproduct,regardlessofwhetherornotitappearsinthepropernameoftheproduct.Theabbreviation“Ch,”whichappearsinsomedisplaysandonsomeOMRONproducts,oftenmeans“word”andisabbreviated“Wd”indocumentationinthissense.Theabbreviation“PC”meansProgrammableControllerandisnotusedasanabbreviationforanythingelse.VisualAidsThefollowingheadingsappearintheleftcolumnofthemanualtohelpyoulocatedifferenttypesofinformation.NoteIndicatesinformationofparticularinterestforefficientandconvenientopera-tionoftheproduct.1,2,3...1.Indicateslistsofonesortoranother,suchasprocedures,checklists,etc.OMRON,1999Allrightsreserved.Nopartofthispublicationmaybereproduced,storedinaretrievalsystem,ortransmitted,inanyform,orbyanymeans,mechanical,electronic,photocopying,recording,orotherwise,withoutthepriorwrittenpermissionofOMRON.Nopatentliabilityisassumedwithrespecttotheuseoftheinformationcontainedherein.Moreover,becauseOMRONiscon-stantlystrivingtoimproveitshigh-qualityproducts,theinformationcontainedinthismanualissubjecttochangewithoutnotice.Everyprecautionhasbeentakeninthepreparationofthismanual.Nevertheless,OMRONassumesnoresponsibilityforerrorsoromissions.Neitherisanyliabilityassumedfordamagesresultingfromtheuseoftheinformationcontainedinthispublication.viviiTABLEOFCONTENTSPRECAUTIONS...................................xiii1IntendedAudience........................................................xiv2GeneralPrecautions.......................................................xiv3SafetyPrecautions.........................................................xiv4OperatingEnvironmentPrecautions...........................................xv5ApplicationPrecautions....................................................xvi6ConformancetoECDirectives...............................................xviii7UnitVersionsofCS/CJ-seriesSerialCommunicationsBoards/Units.................xx8FunctionsAddedintheUnitVersion1.2Upgrade................................xxivSECTION1Introduction......................................11-1UsingthisManual.........................................................21-2Overview................................................................31-3ProtocolOverview.........................................................71-4Features.................................................................131-5SystemConfigurations.....................................................161-6Specifications............................................................251-7ComparisontoPreviousProducts.............................................361-8SelectingtheSerialCommunicationsMode.....................................411-9BasicOperatingProcedure..................................................42SECTION2InitialSettingsandI/OMemoryAllocations............592-1ComponentNamesandFunctions............................................602-2DataExchangewiththeCPUUnit............................................692-3I/OMemoryAllocations....................................................71SECTION3InstallationandWiring.............................853-1InstallingaSerialCommunicationsBoard......................................863-2InstallingSerialCommunicationsUnits........................................873-3Wiring..................................................................913-4RS-232CandRS-422A/485Wiring...........................................110SECTION4UsingHostLinkCommunications....................1194-1HostLinkCommunications.................................................1204-2SetupAreaAllocations.....................................................1204-3AuxiliaryAreaandCIOAreaAllocations......................................1244-4CommunicationsTiming....................................................1284-5ChangesfromPreviousProducts.............................................1334-6HostLinkFunctionforReplacingExistingPCs..................................135viiiTABLEOFCONTENTSSECTION5UsingProtocolMacros..............................1415-1OverviewoftheProtocolMacroFunctions..............................