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IMU06 / CANDataFormat

Race Technology CAN address format

When the option is selected to use the Race Technology addressing system.. This should be selected whenever the IMU is used along with other Race Technology units on a CAN bus. The message contents are exactly the same irrespective of mode, but in the RT format mode the 29 bit address is used to carry data as to the data type, source, and destination. As follows:

All messages use a 29 bit address, made up as follows:

3 bit priority These are set by the transmitter. The lower the number the higher the priority.

2 bits for future expansion (currently set as 00)

16 bit data type If the MSB is <128 then this is a destination specific message, the destination address is given by the LSB (Data Format 1) If the MSB is >127 this is a broadcast message, the MSB determines the main data type, LSB determines the sub type (Data Format 2)

8 bit source address

The top three bits are the data group, the lower 5 bits are the particular unit within that group. Default values are set on units, these will only need to be changed when there is more than one of a particular unit on the CAN network. Groups are as follows.

Units are assigned to a group based on their primary function. A data logger will be classed as a data store, even if it has some built in channels.

Default unit numbers are as follows:

Data source group