Glass Cockpit display brightness

[cesarfsim]

Hello
I have been trying to dim my Glass PDF-ND using IOcards from Open cockpit – SIOC script.
I know the Glass Cockpit display brightness offset is 55F0and 0 - INOP, 1 Dark -100 Bright...
How I Go from 0 zero to 100 ?
Any Idea or exemple
Thanks

Cesar

[Jackpilot]

If you use PM you can simply do it from the CDU.

[cesarfsim]

Yes, I use PM but I want to control the brightnee by harware in my home cockpit.
Thanks