F07426 fault in siemens 6RA80 DC Drive indicate that the Technology controller actual value limited. This means the actual value for the technology controller, interconnected via connector input p2264, has reached a limit.

1. Adapt the limits to the signal level (p2267, p2268).
2. Check the actual value normalization (p0595, p0596).
3. Deactivate evaluation of the limits (p2252 bit 3)