Theben DU 1 Manual page 32

6.6.3 Dimming value limits

The dimming value can be temporarily restricted via object Brightness restriction. This is
used, for example, to ensure that basic lighting is not exceeded at night, while during the
evening the full range of lighting can be used.
The function is implemented as follows:
If the object value = 0, the dimming value is not restricted.
If the object value is greater than 0, then this value indicates the limit for the dimming value.
If the object value is smaller than the configured minimum dimming value, then the brightness
is restricted to this minimum dimming value.
If the restriction is removed, the dimming value continues to remain restricted until a new
dimming command is received.
During the restriction, the Soft On and Soft Off times are adjusted in such a way that the speed
of the brightness change remains the same as when there are no restrictions.
Designation
Perform limit in describing
object
Limit applies to switch
command (1-bit)
Limit applies to relative
dimming (4-bit)
Limit applies to absolute
dimming (8-bit)
Limit applies to soft
switching
Flush-mounted dimming actuator DU 1
Values
no
yes
no
yes
no
yes
no
yes
no
yes
Description
Limit not applied until next dimming
process.
Limit the dimming value as soon as
a value is received on the dimming
value limit object.
No limit during switch commands.
Limit is effective.
No limit during brighter/darker
commands.
Limit is effective.
No limit for percentage value
telegrams.
Limit is effective.
No limit for soft switching
Limit is effective.