Siemens 7LF4 531-0 Operating Instructions Manual page 16

Offset - B
2
* This function is available in Expert mode.
Setting the correction value (1...30 min.) extends the daily
ON period in the middle of the winter season by up to 60
minutes (OFF up to 30 min. later in the morning, ON up to
30 min. earlier in the evening).
In the middle of the summer season, the correction setting
reduces the daily ON period by up to 60 minutes (OFF up
to 30 min. earlier in the morning, ON up to 30 min. later in
the evening).
h
21.03.
24
22
20
18
16
14
12
10
8
6
4
2
0
0 30 60 90 120 150 180 210 240 270 300 330 360
16
2514264123-02
3ZW1012-7LF45-3AA0
23.09
Switching-point
Offset
Correction
t
0h 3 6 9
1
0
The time switch switches on at the calculated sunset time and off at the
calculated sunrise time. By setting an offset, you can shift the switching
times by up to ±120 minutes with respect to the calculated sunrise and
sunset times.
Example: If you set the offset to +30 minutes, the time switch will
switch 30 minutes after sunrise and 30 minutes after sunset. If
you set the offset to -30 minutes, the time switch will switch
30 minutes before sunrise and 30minutes before sunset.
0h 3 6 9
-50'
1
0
If the offset setting is in degrees the time switch switches on and off at
times of equal brightness, despite the differences in twilight time
lengths over the course of the year. Sunrise and sunset correspond to
-50' for the centre of the sun (the edge of the sun is visible on the
horizon).
d
12 15 18 21 24h
12 15 18 21 24h