So, this is a DBC file part for one CAN BUS message.
BO_ 599 ID257DIspeed: 8 VehicleBus
SG_ DI_speedChecksum : 0|8@1+ (1,0) [0|255] "" Receiver
SG_ DI_speedCounter : 8|4@1+ (1,0) [0|15] "" Receiver
SG_ DI_uiSpeed : 24|9@1+ (1,0) [0|510] "" Receiver
SG_ DI_uiSpeedHighSpeed : 34|9@1+ (1,0)...