What is the difference between RELATIVE and ABSOLUTE in the timer settings?

RELATIVE: Count begins from the moment the timer time is set, and timeup occurs when a set time is reached. For example, if timer 1 is currently at 7 days/10 hours/00 minutes, and you set 01 days/10 hours/00 minutes, the timeup occurs every 1 day and 10 hours from that moment, in other words, at 08 days/20 hours/00 minutes.
ABSOLUTE: Count begins from a reference time (REF TIME), and ends when the set time is reached. For example, if you set a REF TIME of 13 hours/00 minutes and set the timer to 1 hour, the time-up occurs every hour after 13:00 (including 13:00).