As a result, parameter groups for address claiming, commanded address and name management are not defined. This is logical and consistent, as the charger and vehicle are always the only participants involved when it comes to charging communication. The specification clearly defines their addresses: 86 (56h) for the charger and 244 (F4h) for the BMS. As the Request mechanism of SAE J1939-21 is used solely for diagnostics, neither the ACKN (PGN E800h) nor Request2 (PGN C900h) nor Transfer (PGN CA00h) parameter group is present. We recommend using caution when it comes to diagnostic messages – GB/T 27930 uses the designations DM1 through DM6 and packs the information on arising problems into DTC (diagnostic trouble code) blocks as described in SAE J1939-73, but this is where the similarities end. Unlike names, parameter group numbers (PGNs) are defined differently from J1939 and the DTCs do not start with byte 3, but rather byte 1. No variations for priority, source address (SA) or destination address (DA). Messages with message lengths (DLCs) shorter than eight are allowed. The first phase of communication is started once the charger and vehicle are connected with the charging cable. The charging process has not yet begun at this point, i.e.
0 Comments
Leave a Reply. |
AuthorWrite something about yourself. No need to be fancy, just an overview. ArchivesCategories |