enableSlowNoMotion - NO_MOTION - 9 Axes Motion Shield


I'm currently using 9 Axes Motion Shield (based on BNO055) on Arduino UNO.
I'd like to start using No Motion feature to understand when device is stationary or not.

Unfortunately I didn't find any additional information (or example) about this shield, except the example inside the library NineAxesMotion.h.
If I change threshold or duration in enableSlowNoMotion(), behavior does not change.

Someone may point me to links or references about no motion interrupt?

Many thanks