Universal dimmer actuators GDA2K-400 KNX / GDA4K-400 KNX
pdated: Mai-17 (Subject to changes) Page 29 of 63
3.3.5 Dimming value limits
The dimming value can be temporarily restricted via Object 8
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 limits 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
change in brightness remains the same as if there were no restrictions.
Table 11
Designation
Values
Description
Perform limit in describing
object
no
Limit not applied till next
dimming process.
yes
Limit the dimming value as soon
as a value is received on the
dimming value limit object (Obj.
8, 38..).
Limit applies to switch command
(1-bit)
no
No limit during switch
commands.
yes
Limit is effective.
Limit applies to relative dimming
(4-bit)
no
No restriction during
brighter/darker commands.
yes
Limit is effective.
Limit applies to absolute
dimming (8-bit)
no
No limit for percentage value
telegrams.
yes
Limit is effective.
Limit applies to soft switching
no
No limit for soft switching
yes
Limit is effective.
