Answer
Automatic ON logs are created:
- after a D log, fully stopped for five consecutive minutes
- OR if driver A logs into the Drive app while driver B is assigned to the moving vehicle, the app creates an automatic ON log with driver B
Additional Notes
From Appendix A to Subpart B of Part 395 ,
4.4.1.2. Automatic Setting of Duty Status to On-Duty Not Driving
When the duty status is set to driving, and the CMV has not been in-motion for 5 consecutive minutes, the ELD must prompt the driver to confirm continued driving status or enter the proper duty status. If the driver does not respond to the ELD prompt within 1-minute after receiving the prompt, the ELD must automatically switch the duty status to on-duty not driving. The time thresholds for purposes of this section must not be configurable.
For additional, and most up to date information access the Appendix A to Subpart B of Part 395 where you can find the complete regulation