DRAFTSAE RECOMMENDED PRACTICE J2178CLASS B DATA COMMUNICATION NETWORK MESSAGESPART 1DETAILED HEADER FORMATS & PHYSICAL ADDRESS ASSIGNMENTS1/5/94THIS PAGE LEFT BLANK TABLE OF CONTENTS SCOPE1REFERENCE AND RELATED DOCUMENTS, TERMS, DEFINITIONS, ABBREVIATIONS, AND ACRONYMS3.1Reference and Related Documents3.1.1SAE Documents3.1.2Other Documents3.2Terms and Definitions3.3Abbreviations and Acronyms6GENERAL INFORMATION7.1Part 1 Overview7.2In-Frame Response Field Formats8.2.1In-Frame Response Type 08.2.2In-Frame Response Type 18.2.3In-Frame Response Type 28.2.4In-Frame Response Type 38SINGLE BYTE HEADER MESSAGES AND FORMAT10CONSOLIDATED HEADER MESSAGES AND FORMAT11.1One Byte Form of the Consolidated Header Format11.2Three Byte Form of the Consolidated Header Format11.2.1Priority / Type - Byte 112.2.1.1Priority (PPP Bits)13.2.1.2Header Type (H Bit)13.2.1.3In-Frame Response (K Bit)14.2.1.4Addressing Type (Y Bit)14.2.1.5Type Modifier (ZZ Bits)15.2.2Target Address - Byte 216.2.3Source Address - Byte 316DATA FIELD FORMATS17.1Functional Data Field Formats17.1.1Functional Data Field Format 017.1.2Functional Data Field Format 117.1.3Functional Data Field Format 217.1.3.1The Parameter / Quantity Bit (Q bit)18.1.3.2The Control Bit (C bit)18.1.3.3The Secondary Address20.1.4Functional Data Field Format 320.1.5Functional Data Field Format 420.2Physical Data Field Formats21.2.1Physical Data Field Format 021.2.2Physical Data Field Format 121.2.3Physical Data Field Format 222.3Extended Addressing22PHYSICAL ADDRESS ASSIGNMENTS25APPENDIX A11SCOPESCOPE:This document defines the information contained in the header and data fields of non-diagnostic messages for automotive serial communications based on SAE J1850 Class B networks. This document describes and specifies the header fields, data fields,...
