﻿#Dimming characteristic

The gateway converts KNX brightness values and brightness values configured in the ETS into DALI brightness values. On the DALI page, the brightness commands are transmitted in an 8-bit data value to the operating devices. This data value according to  is referred to IEC 62386-102 as "Arc Power Level (APL)" in the DALI specification. The ideally dimmable brightness range on the DALI page is represented in the data value by the decimal values 1...254. The value "0" is interpreted by the operating devices as "OFF". A value "255" means "no change of brightness" ("MASK").

When dimming, the logarithmic characteristic curve provided for DALI is not ideal for every control task. For this reason, the gateway allows the DALI dimming characteristic curve to be influenced for absolute dimming without having to intervene in the operating devices.
