Siemens SINAMICS DCM Manual page 315

Commissioning
8.7 Drive optimization
p50051 = 26
WARNING
During the speed controller optimization run, the motor is accelerated at a maximum of 45%
of its rated armature current. The motor can reach speeds of up to approximately 20% of
the maximum speed.
p50051 = 27
316
Optimization of the speed control
(takes at least 6 s)
The dynamic performance of the speed control loop can be selected using
p50236, whereby lower values represent a softer closed-loop control.
Before carrying out the speed controller optimization run, p50236 must be
set and influences the setting of p50225, p50226, p50228 and p50540.
Where possible, the final mechanical load should be connected to the motor
for the purpose of optimizing the speed controller, as the parameters set
depend on the measured moment of inertia.
The following parameters are automatically set:
p50225, P gain of speed controller (Kp)
p50226, integral time of speed controller (Tn)
p50228, speed setpoint smoothing time constant
p50540, speed controller acceleration time
Remark:
The speed controller optimization run only takes into account the filtering of
the actual speed controller value that is set at p50200; and if p50083 = 1,
also filtering of the main actual value, which is parameterized at p50745.
For p50200 <20 ms, P50225 (gain) is limited to a value of 30.00. The speed
controller optimization run always sets p50228 (speed setpoint filtering) to 0.
Optimization of the EMF control (incl. field characteristic recording)
(duration, approx. 1 min)
This optimization run must be executed whenever field-weakening operation
has been selected (p50081 = 1), if closed-loop torque control (p50170 = 1)
or torque limiting (p50169 = 1) has been selected, or if a variable field cur-
rent setpoint has been entered.
This optimization run may also be started without a mechanical load. The
following parameters are set automatically:
p50120 to Field characteristic (magnetization characteristic) of motor
p50139
p50275 P gain of EMF controller (Kp)
p50276 Integral time of EMF controller (Tn)
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SINAMICS DCM DC Converter
Operating Instructions, 02.2015, A5E34763375/RS-AA/001