Question
Tunable White control (variable colour temperature, e.g. 2700 K warm to 6500 K cool) over KNX typically uses two distinct DPTs: one for the overall intensity (DPT 5.001, %) and one for the colour temperature (DPT 7.600, K).
Answer
True
DPT 7.600 is Absolute Colour Temperature in Kelvin (16 bits, technical range 0-65535 but usable range 2000-10000 K). Combined with DPT 5.001 for intensity, it allows independent control of the two dimensions. This is the standard binding for Tunable White luminaires using a warm-white plus cool-white dual-channel LED.
Preparation tip
Lock the controllable colour-temperature range to the values supported by the luminaire datasheet: a command for 10000 K to a luminaire capped at 6500 K silently clamps and confuses end users about the actual behaviour.
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