An option in AutoDj > Station ID's
Station IDs per hour
Play this many station IDs per hour when on Auto DJ. Make sure you categorize your Station ID tracks in the library.
[ X ] Select this box if you would like an ID to play at the Top of the hour.
(Please note that the ID will play as close to the top of the hour as possible. Current track will play in its entirety before the ID is queued.)