Hello:
The "Trip" feature is based on "ignition", "movement" and "speed" criterias. When Ignition according to "Ignition source" is ON and Movement according to "Movement source" is ON and also the 'Start Speed' is exceeded, the "Trip" starts.
In the other hand, the "Ignition OFF Timeout" is the timeout value to detect "Trip end" once the Ignition (ignition source configuration) is off.
Hope this can help you
Best Wishes!