ABB i-bus KNX Product Manual page 102


ABB i-bus KNX
Commissioning
Options:
Changing brightness during ("lighting
control")
Option:
This parameter determines how fast the lighting changes when the lighting control commences.
Normally this parameter can be used to select between fast, medium, slow and individual setting. With
master mode only medium, slow and individual setting are possible to reduce the bus load.

fast: The DLR/A starts to control with fast successive (< 2 seconds) dimming steps in order to reach
the setpoint as quickly as possible. A fast correction may be necessary if the constant lighting control
has to react quickly to the shade or shadows that result from a blind, which closes quickly.

medium: The DLR/A commences with sending dimming steps at medium speed (< 3 seconds) to
achieve the setpoint.

individual setting: A fine adjustment of the control can be undertaken. Further parameters are enabled
that can be used to influence the light control.
100 2CDC507128D0202 | DLR/A 4.8.1.1
Offset value to (increase/decrease)
master brightness value
+10/ +80...+20, 0 , -20...-80 %
Using this parameter, the percentage offset is determined that is used to increase or
decrease the brightness value of the master, refer to
fast
medium
slow
individual setting
o
slow: The DLR/A commences with sending dimming steps at slow speed (< 4 seconds) to
achieve the setpoint. The control speed is dependent on the divergence from the setpoint, see
table Determine setpoint, page 171. Achieving the setpoint value is also dependent on the
control increment size, refer here to
Generally artificial lighting and daylight are sufficient in order to ensure exact and stable
constant lighting control. Should this not be possible however – due to particular ambient
conditions and/or the properties of the lamp – the control can be influenced with the
following parameters:
Slave with offset
control dynamics, page 101.
function, page 189.