ABB i-bus KNX Product Manual page 103

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ABB i-bus KNX
Commissioning
The following parameters influence the control dynamics of the light controller. Generally this fine tuning of
the control circuit is not necessary. Normally the artificial lighting and daylight calibration with the preset
control dynamic parameters is sufficient to set good and stable constant lighting control. If however this is
not the case and it is not possible to set stable lighting control due to special conditions in the room, e.g.
delays in the lighting circuit, manual fine tuning of the lighting control can be undertaken with these
enabled control dynamic parameters.
Caution: These parameters have effect
on the lighting control function.
Please refer to the product manual!
<−−− NOTE
Step time for fast approach
Options:
This parameter defines the step time of a control step in the start up phase. The smaller the step time, the
faster the control steps are applied with their increment size (brightness). The light control quickly
approaches the setpoint.
This step time is used if the actual value still varies greatly from the setpoint. Otherwise the step time for
slow approach is used.
For further information see:
Note
The step time may not be selected to be less than the delay of the control circuit. This is comprised of
the detection speed of the light sensor and the dynamic response of the luminaires. If the step time is
less than the delay of the control circuit, the DLR/A will set the brightness beyond the target value and
oscillation will occur in the lighting control. In this case, the change in brightness due to a control step
will only be achieved after sending the next control step.
as quickly as possible.
0.1/0.2...1*...9/2.0 s
* Default value if control parameterized as a master
Constant lighting control, page 167
DLR/A 4.8.1.1 | 2CDC507128D0202 101