【精品】MODBUS通讯协议.doc

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1、Fi5rdelningn（）PROGRAMVARA-TRL/2-SPEC+GKP-EE-P,GKP-VK-PFcirKiinncck^m/CopyDocumentreviewed2000-11-24Reviewgroupmembers:GSP,GSS,GU-PA,GU-SJMODBUSFORTRL/2ANDREX/PRO:STANDARDQUESTION1GENERAL22MODBUSPROTOCOL43DATAFUNCTIONS84DIAGNOSTICFUNCTIONS225DEVICEDESCRIPTONS236DATAFUNCTIONEXAMPLES317EXCEPTIONRESPON

2、SES348CRCGENERATION351GENERAL1.1IdentificationThisdocumentspecifiestheprotocolforcommunicationbetweenaHOSTcomputerandSaabTankRadarL/2units,exceptOPI,usingtheMODBUSstandardprotocoldefinedindocumentGOULDMODICONMODBUSPROTOCOLReferenceGuide.1.2RevisionHistoryIssue1Issue292/05/05AddedRTGanaloginputstoFC

3、U/OPIdatabase.Addedmoreexplanationstovalueorder.Changed"levelstatus"to"RTGstatus'*.AddedCRC-16code.Issue392/09/10RTGstatuschanged.Issue492/10/27AddedadditionalregisternumbersforFC02,FC03andFC04.Modifiedchapteraddressesandexamples.DAUNMIapproval.Issue594/07/04OPIinterfacemovedtoTRL/2-93.156Calibrati

4、onerrorandsystemerrorbitsinDAUstatusadded.Addedgeneraldescriptionofvaluesinprotocol.Issue696/05/20CorrectedCRCinexamples.RTGstatuschanged.Issue798/02/06FCUdiagnosticregisterisavailabletohostcomputers.Seechapter521FCUDiagnosticregister.(FCUprogramversion3.B0orlaterisrequiredforthisfunctionality.)Add

5、edtheotherapplicabledevices.Reorganizedthedocument.Issue8-AddedREX/PROinformation.-HartInputregisterhasreplacedtheFrequencyInputregistersinFCU3.DO.13DefinitionsAIAnaloginputsCOSConfigurationSoftware,DOSbasedprogram(SaabTankControl)DAUDataAcquisitionUnitDCDiagnosticFBFCUFieldbusFBMFieldBusModemFCUFi

6、eldConnectionUnitGBFCUGroupbusHOSTHostComputerNMINederlandsMeetlnstituut.OPIOperatorsInterfaceprogram,usedinTRL2onaPC(SaabTankControl)RTGRadarTankGaugeTBDToBeDefinedTRL2SAABTankRadarL/2TRL2UnitsDAU,FCU,OPI,RTG6.1Reference1.ModiconModbusProtocolReferenceGuidePI-MBUS-300RevG.Nov1994MODICON,Inc.2.TheM

7、odbusProtocolappliedtotheTRL2CommunicationSystemTRL2-89.28Issue23.Protocolspecification-TRL/2OPIModbushostprotocolTRL/2-93.1566.2FileStorageu:gksgks-91.06modbusfortrl2.doc1MODBUSPROTOCOL1.1IntroductionThe