Siemens SIMOREG DC Master 6RA7018-6DS22 - Page 156

Start-Up 02.00
7-14 SIEMENS AG 6RX1700-0AD76
SIMOREG DC Master Operating Instructions
P051 = 26 Speed controller optimization run (process lasts approximately 6s)
The following parameters are set automatically: P225, P226 and P228.
Note:
The speed controller optimization run takes only the filtering of the actual speed
controller value parameterized in P200 into account and, if P083=1, filtering of the
main actual value parameterized in P745.
When P200 < 20ms, P225 (gain) is limited to a value of 30.00.
The speed controller optimization run sets P228 (speed setpoint filter) to the
same value as P226 (speed controller integration time) (for the purpose of
achieving an optimum control response to abrupt setpoint changes).
WARNING
During the speed controller optimization run, the motor is accelerated
at a maximum of 45% of its rated armature current. The motor may
reach speeds of up to approximately 20% of maximum speed.
If field weakening is selected (P081 = 1), if closed-loop torque control (P170=1) or torque limiting
(P169=1) is selected or if a variable field current setpoint is applied:
P051 = 27 Optimization run for field weakening (process lasts approx. 1min)
The following parameters are set automatically: P117 to P139, P275 and P276.
Note:
In order to determine the magnetization characteristic, the field current setpoint is
reduced during the optimization run from 100% of the motor rated field current as
set in P102 down to a minimum of 8%. The field current setpoint is limited to a
minimum according to P103 by parameterizing P103 to values < 50% of P102 for
the duration of the run. This might be necessary in the case of uncompensated
motors with a very high armature reaction.
The magnetizing characteristic is approximated linearly to 0, starting from the
measuring point, at a minimum field current setpoint.
To execute this optimization run, the minimum motor field current (P103) must be
parameterized to less than 50% of the rated motor field current (P102).
WARNING
During this optimization run, the drive accelerates to approximately
80% of rated motor speed (the armature voltage corresponds to
maximum 80% of the rated motor armature voltage (P101)).