Open-Loop Controlled Operation - Siemens SINAMICS DCM 6RA80 Faq

be calculated, see below.
Note: The current limits have no affect in controlled operation, only the set firing angle limits
for Alpha G and Alpha W have an effect. – End of Note.
The firing angle offset can be changed in fine increments from -100 % to positive values, the
resulting current r50019 for the armature actual value: 100% actual current from p50100 or
r50035 for the field current actual value: 100 % actual current from p50102, must be
checked.
-100 % corresponds to 180 degrees, 0% corresponds to 90 degrees, and 100% corresponds
to 180 degrees.
Firing angle in degrees = r52100[%] * 180 / (-200) + 90 for the armature circuit, see
parameter r50018
Firing angle in degrees = r52260[%] * 180 / (-200) + 90 for the field circuit, see parameter
r50034
Additional measurement of current actual value by means of an ammeter necessary!
Open-Loop Controlled operation for the armature circuit:
Sheet 3100, 6855 and 6860. With p50601[4] = 52401. With the
Setpoint change from 15% to 18%
PI controller, p50224 = 0
Without reference model
Blue: actual speed value
Green: r52155 reference model output
Reference model set so that curves are
almost flush
Setpoint change from 15% to 18%
PI controller, p50224 = 1
With reference model; p50240 = 1
Actual speed value blue
Almost devoid of overshoot

Open-Loop Controlled operation

For test purposes it is possible to operate
the device in open-loop controlled mode.
The resulting device output voltage can
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