ABB i-bus KNX Product Manual page 108

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ABB i-bus KNX
Commissioning
Step time for slow approach
Options:
This parameter defines the step time of a control step when approaching the actual value. The larger the
step time, the longer until the brightness of the control step is set. The light controller slowly approaches
the setpoint. This step time is used when the actual value is relatively near to the setpoint. Otherwise the
step time for fast approach is used.
For further information see:
Setpoint/actual difference, for
changeover of fast/slow approach
Options:
This value represents the control divergence (difference between the setpoint and actual value), at which
there is a change between fast and slow approach to the setpoint. Above this control divergence there is a
fast approach (small increments of the control step), below it there is slow approach with a large step time.
At the same time, the response of the lighting control is slower with larger values, whereby they do not
respond too sensitively to brightness changes caused by clouds or temporary changes, e.g. persons in the
detection area of the light sensor in the room.
For further information see:
Max. step width
Options:
This value defines the maximum increment size of a control step. This is the maximum brightness
difference that the DLR/S can perform per control step. In this way, the DLR/S can approach the setpoint
value in large steps. There is a danger, however, it exceeds the setpoint and that the light control will be
unstable.
For further information see:
Setpoint/actual diff., up to which
control is with max. step width
Options:
This value represents the control divergence (difference between the setpoint and actual value) up to
which the maximum increment can be controlled. In this way, the DLR/S can approach the setpoint value
in fast steps. The increment should always be considered in conjunction with both approach parameters.
Both parameters change the control dynamics and the approach speed to the setpoint value.
For further information see:
Deviation actual value from nominal
value for starting controlling
Options:
This value defines a range around the setpoint, in which no light control occurs. Only after the actual value
(brightness value) is again outside this range does light control recommence. In this way, continuous
control with the respective changes in brightness is avoided. This generates a smoother and less abrupt
response and considerably reduces the bus load with a master/slave control.
For further information see:
106 2CDC 507 100 D0202 | DLR/S 8.16.1M
1/2...4*...9/10 s
* Default value if control parameterized as a master
Constant light control, page 171
10...20...50
Constant light control, page 171
1...5*...10
* Default value if control parameterized as a master
Constant light control, page 171
10...30...255
Constant light control, page 171
0...1...30
Constant light control, page 171