To record a daily rest either: change the mode to rest when your start the rest and change it back to work when you finish the rest - and don’t touch the tacho in between.
Or, eject the card when you start the rest and reinsert it when you end the rest.
Ejecting or inserting the card will interrupt the activity, even if it was recording rest before or after, so that will count as as the point daily rest is recording to or from.