Bosch DISBLAY DDU 7, Manual, Page: 111 / 160

Notice
If no condition is defined or condition is ‘false’, measurement
channels are recorded at the value chosen in ‘Rate’.
If the condition is ‘true’, measurement channels are recorded at the value chosen
in ‘True rate’.
Using fast block/slow block transmission
DDU 7 telemetry uses available bandwidth of Telemetry Unit FM 40 (19,200 baud
‐> approx. 1,700 bytes/s). The bandwidth has to be divided into channel informa‐
tion to be transmitted high‐frequently and low‐frequently using the ‘fast/ slow
block’ setting.
Channels are grouped into 8 blocks which are transferred each cycle:
▪ Fast block (Block 1) is transferred every cycle and used for a high‐frequent
transmission of channel information (e.g. speed, rpm).
▪ Slow blocks (Block 2…n) are transferred every n‐th cycle and used for a low‐
frequent transmission of channel information (e.g. tire pressure, oil tempera‐
ture).
Transmission Scheme
If the maximum bandwidth of a block is reached, a warning will be displayed. To
fix this problem you can view the allocation of the channels and data rate in the
‘Statistics’ tab of the Main Area. See chapter ‘
Recording statistics [
}
112] ’ for
more information.
Adding a recording
DDU 7 supports up to two independent recordings.
To add a recording, select ‘Add Recording’ from the context menu of the Logger
in the DDU 7 Project Tree.
Maximum two recordings are possible. In the device software the 2nd recording
is reserved for scruteneering data. This recording is invisible (protected).
Adding a recording group
Recording channels can be grouped.
To add a new group, select ‘Add group’ in the context menu of the recording.
The groups can be renamed to ‘Gearbox’, ‘Aero’, ‘Engine’, etc.
13.2.1
13.2.2
Recording and Telemetry | 13
Bosch Motorsport DDU 7 Manual 111 / 160