In order to directly set the power level for a given control gear (lamp) using DALI, you have to send the following two bytes:
- The short address of the control gear, multiplied by
2 - The data byte containing the power level (
0...255).
In order to distinguish between command messages (frames) and DAPC (direct arc power control) messages, remember that the 1st bit must always be 0 for DAPC messages.
For example, if you want to set half brightness level for the lamp with short address 3, send the following bytes:
- 6 (= 3 * 2)
- 127 (= half brightness)