There are 3 components the system needs for this. RPM, Manifold Pressure, and fuel flow. If you're missing one of those the system won't display power percentage. Check and see if you are missing configuration or calibration for one of those.
OK thanks. I am looking for Throttle position percentage. RV12is has you set this before engine start. I’ll have the check manifold pressure but we don’t have a constant speed prop.
You also need to select your engine type (Lycoming etc.), horsepower and max RPM in the Engine Power configuration page. See page 30-226 of the Installation Manual Revision AW.
This question is in the RV-12 forum, I assume you are inquiring for the Rotax RV-12iS FADEC throttle position.
Throttle position is reported via the Rotax ECU, therefore you must have the lanes switched on. Throttle position will be shown in the EIS section between the Manifold Pressure and the Tach and will be proceeded with a letter "T".
The info is in the G3X User Manual.
The Rotax Operator Manual has a great table showing recommended start-up throttle position based on ambient temperature.