SAE-J1939-71-1996

SAETechnicalStandardsBoardRulesprovidethat:“ThisreportispublishedbySAEtoadvancethestateoftechnicalandengineeringsciences.Theuseofthisreportisentirelyvoluntary,anditsapplicabilityandsuitabilityforanyparticularuse,includinganypatentinfringementarisingtherefrom,isthesoleresponsibilityoftheuser.”SAEreviewseachtechnicalreportatleasteveryfiveyearsatwhichtimeitmaybereaffirmed,revised,orcancelled.SAEinvitesyourwrittencommentsandsuggestions.QUESTIONSREGARDINGTHISDOCUMENT:[phone]FAX:[phone]TOPLACEADOCUMENTORDER;[phone]FAX:[phone]SAEWEBADDRESS—ThisseriesofSAERecommendedPracticeshasbeendevelopedbytheTruckandBusControlandCommunicationsNetworkSubcommitteeoftheTruckandBusElectricalandElectronicsCommittee.Theobjectivesofthesubcommitteearetodevelopinformationreports,recommendedpractices,andstandardsconcernedwiththerequirementsdesignandusageofdeviceswhichtransmitelectronicsignalsandcontrolinformationamongvehiclecomponents.Theusageofthesedocumentsisnotlimitedtotruckandbusapplications;otherapplicationsmaybeaccommodatedwithimmediatesupportbeingprovidedforconstructionandagriculturalequipment,andstationarypowersystems.Thesedocumentsareintendedasaguidetowardstandardpracticeandaresubjecttochangesoastokeeppacewithexperienceandtechnicaladvances.TABLEOFCONTENTS1.Scope.......................................................................................................................................................41.1.Purpose....................................................................................................................................................42.References...............................................................................................................................................42.1ApplicablePublications.............................................................................................................................42.1.1SAEPublications......................................................................................................................................42.1.2ISOPublications.......................................................................................................................................42.1.3OtherPublications....................................................................................................................................43.Definitions.................................................................................................................................................44.TechnicalRequirements...........................................................................................................................44.1GeneralGuidelines...................................................................................................................................44.1.1SignalCharacterization............................................................................................................................44.1.2MessageFormat.......................................................................................................................................44.1.3ParameterRanges...................................................................................................................................54.1.4AssignmentofRangestoNewParameters..............................................................................................54.1.5AddingParameterstoParameterGroup..................................................................................................74.1.6TransmissionRepetitionRates(UpdateRates)........................................................................................84.2ParameterDefinitions...............................................................................................................................94.2.1ControlParameters..................................................................................................................................94.2.2DrivestepStateParameters....................................................................................................................284.2.3DrivetrainControlParameters................................................................................................................36SAEJ1939/71RevisedMAY96-2-4.2.4DrivetrainConfigurationParameters.......................................................................................................414.2.5InformationalParameters........................................................................................................................464.2.6InformationalStatusParameters.................................................