CV 123

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CV 123
Rule 17 Dimmer Button (0-6)
Range of Values0-255
Accepted Values0-255
Default Value32

NMRA CV 126 - Manual Rule 17 Dimmer Button Remapping (0-6)

This CV controls what button manually dims Rule 17 lights. The value entered into this CV directly corresponds bitwise to the button number you would like to use for manual Rule 17 dimming. See the table below:

CV 126 - Rule 17 Button Mapping For Function Group 1 (0-6)
Bit Button to Map Default Value
0 or 1 0 NO 1 or 2
2 1 NO 4
3 2 NO 8
4 3 NO 16
5 4 YES 32
6 5 NO 64
7 6 NO 128


If you would like to use multiple buttons to be able to dim Rule 17 Lights, set each bit for each button you would like to use. Set this CV to 0 if you do not want any button to dim the headlight manually.

See Dual Enabled Functions to if you want to make the manual Rule 17 dimmer button active in Sound Mode and not just in Light Mode

Related: