This video will show you how to program your AQT-56SE softener valve as a Meter Delay System.
This programming setup fits the following valve models:

AQT-56SE-SM

The meter delay regeneration mode allows your system to regenerate at the day and hour after the system capacity zeros out.

For more details about your valve, check the installation manual. You can download it here:

https://aquatroltech.com/dl/manuals/AQT-56SE_Manual.pdf