Did you read the chapter 7.5 of the manual
, especially cautions of optimization runs (P051=25, page 171):
Permanent-field motors (and motors with an extremely high residual flux) must be
mechanically locked during this optimization run.
In order to avoid rotation in the case of separately excited motors with a very high
field circuit time constant, the motor field current must be zero before starting this
optimization run. The value 1 (11, 21) must therefore be set at P082 instead of 3
(13, 23) for the duration of this optimization run. The standstill field P257 is to be
set to 0.0 percent if P082 = 2 (12, 22).
The set current limits are not effective during the current controller
optimization run. 75% of the rated motor armature current flows for
approximately 0.7s. Furthermore, individual current spikes of
approximately 120% of the motor rated armature current are