Theben SELEKTA top2 Series Manual page 51


This is followed by the selection of the week day 1 to 7, i.e. the week day Monday to Sunday
can be set. The set week day is valid both for the changeover from winter to summer time as
well as for the changeover from summer to winter time.

Finally, the hour for the summer/winter time switchover is selected, i.e. the hour at which the
time switch goes forward by one hour. The changeover from summer to winter time is carried
out at the same hour (it then goes back one hour later to this time). The setting range is from
12:00 AM to 10:00 PM. 11:00 PM is blocked to ensure that, when going back from summer
time to winter time, the time after the date change at 12:00 AM does not have to go back to
11:00 PM on the previous day.

To go back from summer to winter time, only the month for the reset and the week in the
month (1 - 5) have to be set. The rule is then saved.
SU-WI FIXED DATE
In this case, two fixed dates can be entered (month + day + changeover hour), on which the
changeover is to be made from winter to summer time and vice versa each year.

First enter the month for the summer/winter time switchover (e.g. March).

Then enter the day for the summer/winter time switchover (e.g. 29 March).

Finally, the hour for the switchover is entered, i.e. the hour at which the time switch goes
forward by one hour (e.g. at 2:00 AM). The setting range is from 12:00 AM to 10:00 PM. 11:00
PM is blocked to ensure that, when going back from summer time to winter time, the time after
the date change at 12:00 AM does not have to go back to 11:00 PM on the previous day.

To go back from summer to winter time, only the month for the reset and the day must be
entered (e.g. reset on 30 October). When resetting, one hour later there is an automatic return
to the time set previously for the winter/summer time switchover (e.g. from 3:00 AM to 2:00
AM).
Information on using the SU-WI rule in the southern hemisphere:
The free rule and the changeover with fixed date can be used both for the northern hemisphere and
the southern hemisphere.
When used for the southern hemisphere, you simply have to use the date in the second half of the
year (e.g. October) for the changeover from winter to summer time, and the date in the first half of the
year (e.g. March) for the reset from summer to winter time.
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