Can Configuration; Can Bus Trivia - Bosch VCU Manual

10.1 CAN Bus Trivia

Bosch Motorsport

10 CAN Configuration

The Vehicle Control Unit VCU has 4 (plus 4 on request) fully configurable CAN bus(es).
– Baudrate 125 kbaud to 1 Mbaud
– 11 Bit or 29 Bit identifiers
– Input configuration: Read messages from CAN bus and convert to Vehicle Control
Unit VCU measurement/display variables. CAN bus supports row counter configura-
tion.
– Output configuration: Write RaceCon measurement variables to CAN messages; out-
put frequency and row counter are configurable, CAN gateway functionality (transfer
from one bus to another).
CAN Message
– 11 Bit (standard) or 29 Bit (extended) identifier
– Up to 8 bytes of data payload
CAN Bus
– Needs termination resistors in wiring harness
– All devices connected to the bus must use identical data rate
– Configuration of bus data rate in the 'CAN messages overview' menu. To access the
menu, double-click on one of the CAN bus items of the project tree
Row Counter Concept
– Re-use (multiplex) of message identifiers
– One byte of message contains row counter
– 7 bytes payload remaining
– Position of row counter is configurable
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