MoTeC SDL - Manual (Page 9)

MoTeC Overview 7
km/h, and stop when the engine RPM is below 500 RPM for 10 seconds. Note
that the Start Condition must be true and the Stop Condition must be false
before logging will start.
Retrieving the Logged Data
A laptop or desktop PC is used to unload the logged data from the SDL. The
logged data is then stored on the computer hard disk.
The logged data may be retrieved at very high speed (approximately 2.5
seconds per Mbyte when using USB or 20sec Mbyte when using CAN).
After each unload the user has the option to clear the logging memory.
The unload may be interrupted part way through if necessary by
disconnecting the computer. The partial unload will contain the most recently
logged data and will be stored on the computer hard disk. In this case the
SDL logging memory is not cleared and logging will continue as normal at the
end of the existing data. Next time the logged data is unloaded both the new
data and the previously partly unloaded data will be retrieved.
Track Map Sensor Requirements
In order for the logging analysis software to plot a track map the following
sensors are required and must be logged.
• Lateral G force (inbuilt in the SDL)
• Wheel
Speed
• Lap Beacon (from either MoTeC Beacon kit or a switch. Note that the
‘Beacon’ Channel must be logged)
• Longitudinal G force (Optional: See Below)
A Longitudinal G force sensor should be used if the vehicle has only one
wheel speed sensor. This allows the analysis software to eliminate wheel
lockups which is essential when creating or using a track map.
Other Functions
The SDL can perform many other functions and calculations including the
following: