890557_d•en•01.07.2014
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48
Wisotronic 1-channel
Operating instructions
7.2.2.15 Asing dawn/dusk control
correctly
The following example illustrates the effects of the setting values for the
dawn/dusk control described above.
Example
Using an example, the following graphic demonstrates schematically how the
outdoor brightness can change in the course of dawn/dusk:
Brightness curve
Brightness in lx
Limit value EVENING
Limit value MORNING
Time
5 Min
5 Min
Dela
y
EVENIN
G
Dela
y
MORNIN
G
1
2
3
4
Fig. 13
Brightness curve and movement behaviour
The bold black curve represents the brightness in the course of the day; the
three horizontal lines are the limit values you have set for raising or lowering
the sun shading product.
The brightness increases at dawn until Point
a
of the curve is reached; the
limit value “DAWN” is reached there and then exceeded. The activation delay
of 5 minutes (this cannot be changed) now begins to run. At Point
b
of the
curve this time has elapsed and the limit value is still exceeded – the sun
shading product now moves to the set position “DAWN”.
The brightness decreases at dusk until Point
c
of the curve is reached; the
limit value “DUSK” is reached there and is then undercut. The deactivation
delay of 5 minutes (this cannot be changed) now begins to run. At Point
c
of the curve this time has elapsed and the limit value is still undercut – the
sun shading product now moves to the set position “DUSK”.
NOTE
If the limit value “DAWN” is undercut again within the delay time, the sun
shading product does not move to the set position “DAWN” at Point
b
of
the example. If the limit value “DUSK” is exceeded again within the delay
time, the sun shading product does not move to the set position “DUSK” at
Point
d
of the example.
7.2.2.16 Uhe dawn/dusk control
during a wind or ice alarm
The dawn/dusk control is not effective during a wind, precipitation or ice
alarm. The dawn/dusk control continues after the alarm has been cleared.
awn/ usk control
