SAE建议使用的实践J2178类B数据通信的网络消息零件1Word文档格式.docx

SAE建议使用的实践J2178类B数据通信的网络消息零件1Word文档格式.docx

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PHYSICALADDRESSASSIGNMENTS

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THISPAGELEFTBLANK

TABLEOFCONTENTS

SCOPE1

REFERENCEANDRELATEDDOCUMENTS,TERMS,DEFINITIONS,ABBREVIATIONS,ANDACRONYMS3

.1ReferenceandRelatedDocuments3

.1.1SAEDocuments3

.1.2OtherDocuments3

.2TermsandDefinitions3

.3AbbreviationsandAcronyms6

GENERALINFORMATION7

.1Part1Overview7

.2In-FrameResponseFieldFormats8

.2.1In-FrameResponseType08

.2.2In-FrameResponseType18

.2.3In-FrameResponseType28

.2.4In-FrameResponseType38

SINGLEBYTEHEADERMESSAGESANDFORMAT10

CONSOLIDATEDHEADERMESSAGESANDFORMAT11

.1OneByteFormoftheConsolidatedHeaderFormat11

.2ThreeByteFormoftheConsolidatedHeaderFormat11

.2.1Priority/TypeByte112

.2.1.1Priority（PPPBits）13

.2.1.2HeaderType（HBit）13

.2.1.3InFrameResponse（KBit）14

.2.1.4AddressingType（YBit）14

.2.1.5TypeModifier（ZZBits）15

.2.2TargetAddressByte216

.2.3SourceAddressByte316

DATAFIELDFORMATS17

.1FunctionalDataFieldFormats17

.1.1FunctionalDataFieldFormat017

.1.2FunctionalDataFieldFormat117

.1.3FunctionalDataFieldFormat217

.1.3.1TheParameter/QuantityBit（Qbit）18

.1.3.2TheControlBit（Cbit）18

.1.3.3TheSecondaryAddress20

.1.4FunctionalDataFieldFormat320

.1.5FunctionalDataFieldFormat420

.2PhysicalDataFieldFormats21

.2.1PhysicalDataFieldFormat021

.2.2PhysicalDataFieldFormat121

.2.3PhysicalDataFieldFormat222

.3ExtendedAddressing22

PHYSICALADDRESSASSIGNMENTS25

APPENDIXA1

1SCOPESCOPE:

Thisdocumentdefinestheinformationcontainedintheheaderanddatafieldsofnon-diagnosticmessagesforautomotiveserialcommunicationsbasedonSAEJ1850ClassBnetworks.Thisdocumentdescribesandspecifiestheheaderfields,datafields,fieldsizes,scaling,representations,anddatapositionsusedwithinmessages.

ThegeneralstructureofaSAEJ1850messageframewithoutin-frameresponseisshowninFigure1below.ThestructureofaSAEJ1850messagewithin-frameresponseisshowninFigure2.Figures1and2alsoshowthescopeofframefieldsdefinedbythisdocumentfornon-diagnosticmessages.RefertoSAEJ1979forspecificationsofemissionsrelateddiagnosticmessageheaderanddatafields.RefertoSAEJ2190forthedefinitionofotherdiagnosticdatafields.Thedescriptionofthenetworkinterfacehardware,basicprotocoldefinition,theelectricalspecifications,andtheCRCbytearegiveninSAEJ1850.

<

-----SAEJ2178----->

SOF

HeaderField

DataField

CRCbyte

EOF

Figure1-ScopeofSAEJ2178foraSAEJ1850

FramewithoutIn-FrameResponse（IFR）

--SAEJ2178-->

EOD

IFR

Figure2-ScopeofSAEJ2178foraSAEJ1850

FramewithIn-FrameResponse（IFR）

SAEJ1850definestwoandonlytwoformatsofmessageheaders.TheyaretheSingleByteheaderformatandtheConsolidatedheaderformat.Theconsolidatedheaderformathastwoforms,asinglebyteformandathreebyteform.ThisdocumentcoversalloftheseformatsandformstoidentifythecontentsofmessageswhichcouldbesentonaSAEJ1850network.

Thisdocumentconsistsoffourparts,eachpublishedseparately.

Part1ofSAEJ2178（Titled:

DetailedHeaderFormats&

PhysicalAddressAssignments）describesthetwoallowedformsofmessageheaderformats,singlebyteandconsolidated.Italsocontainsthephysicalnodeaddressrangeassignmentsforthetypicalsub-systemsofanautomobile.

Part2ofSAEJ2178（Titled:

DataParameterDefinitions）definesthestandardparametricdatawhichmaybeexchangedonSAEJ1850（ClassB）networks.Theparameterscaling,ranges,andtransferfunctionsarespecified.Messageswhichrefertotheseparametricdefinitionsshallalwaysadheretotheseparametricdefinitions.ItisintendedthatatleastoneofthedefinitionsforeachparameterinthispartmatchtheSAEJ1979definition.Thedetailsofthispartarefullydescribedinparagraph3.1below.

Part3ofSAEJ2178（Titled:

FrameIDsforSingleByteFormsofHeaders）definesthemessageassignmentsforthesinglebyteheaderformatandtheonebyteformoftheconsolidatedheaderformat.

Part4ofSAEJ2178（thispart,Titled:

MessageDefinitionforThreebyteHeaders）definesthemessageassignmentsforthethreebyteformoftheconsolidatedheaderformat.

2REFERENCEANDRELATEDDOCUMENTS,TERMS,DEFINITIONS,ABBREVIATIONS,ANDACRONYMSREFERENCEANDRELATEDDOCUMENTS,TERMS,DEFINITIONS,ABBREVIATIONS,ANDACRONYMS:

2.1ReferenceandRelatedDocuments.1ReferenceandRelatedDocuments:

2.1.1SAEDocu