ABB i-bus KNX Product Manual page 60

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ABB i-bus KNX
Commissioning
Characteristic adjustment of
DALI lighting curve
Options:
With this parameter, it is possible to adapt the dimming curve for the control of a lighting group.
The method of adaptation of the value range for the brightness values of the KNX (0, 1...255 or 0...100 %)
to DALI (0, 1...254 or 0, physical minimum ...254) can be parameterized.
For further information see:
Note
The physical minimum is the minimum brightness value that the ballast can set based on its physical
properties.
The term originates directly from the IEC 62386 and EN 60929.
no, logarithm DALI lighting curve: The dimming curve is not modified. The DALI dimming curve as it is
stipulated in the DALI standard (EN 62386 and EN 60929) is used unchanged for the control of DALI
devices.
For further information see:
linear dimming curve: The KNX value range is converted to the DALI value range, so that a linear rela-
tionship between KNX values and DALI values (electronic power on the lighting equipment or lumi-
nous flux) results. The logarithmic DALI curve is thus converted to a linear representation.
In this way, ballasts with an applied minimum dimming value (in other words luminous flux) of 3 % can
be controlled exactly with this value. Should the logarithmic DALI curve be applied, the KNX value of
50 % would be applied in this case.
For further information see:
linear dimming curve, without phys-min brightness value: The KNX value range (1...255) is converted
to the DALI value range (physical minimum...254), whereby the unusable range of DALI control val-
ues (0...physical minimum), which the lighting equipment cannot realise, is omitted.
For further information see:
58 2CDC 507 114 D0201 | DGN/S 1.16.1
no, logarithm DALI lighting curve
linear dimming curve
linear dimming curve, without phys-min brightness value
DALI lighting curve, page 147
DALI lighting curve, page 147
DALI lighting curve, page 147
DALI lighting curve, page 147