A07449 alarm in siemens 6RA80 DC Drive indicate that the Position tracking actual position outside tolerance window. This means tthe currently effective motor encoder was moved through a distance greater than was parameterized in the tolerance window. It is possible that there is no longer any reference between the mechanical system and encoder.

Reset the position tracking as follows:

1. Select encoder commissioning (p0010 = 4).
2. Reset position tracking, position (p2720.2 = 1).
3. De-select encoder commissioning (p0010 = 0).