DALI Dimming and fading
DALI defines dimming for all drivers. While the dimming level is an 8 bit number from 0 to 254, these values are converted by a logrithmic curve to 4096 levels by the AL-WS-DR2. We therefore dim from 100 uA to 1400 mA in 4096 steps.
This is especially import during fade - the AL-WS-DR2 can change from one light level to another with a smooth soft fade, for this to look good, requires very precise dimming.
The dimming level can be set by the slider on the AL-WS-DR2, by the 3-Way switch attached to the AL-WS-DR2 remotely, or by DALI. The last level selected is stored in the switch for recall after a power outage.
If the user changes the dimming level at the switch - this is sent to the bus to be used by other switches in Tandem mode, and to be recorded by the hub ( if there is a hub ).
There are 2 dimming levels in each AL-WS-DR2, the slider on the physical master switch, and a virtual dimmer associated with the 3-way. Press and hold the 3-Way momentary button to change the dimming level.
If a CCT bulb is attached, then dim to warm is enabled by default, this can be disabled by the hub. ( the hub does not have to remain at the house ). Fade times can also be changed. Dim to Warm means that the bulb goes to a warm color as the light is turned down.
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