Palette with time info only?

Is there a way to make a palette that stores only time information?

For instance, we have a wall lit with LED's and often when I program a color change I like to apply a fanned delay so that the color sweeps down the wall. It would be convenient if I could apply that with a color palette that is masked to only have time information.

I tried loading color and fade / delay times to the fixtures in the programmer then recording a color palette with only the time mask selected, but it didn't work.

Am I missing the trick or is this not possible?

Thanks.
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