ABB ACS280, Руководство по прошивке, Страница: 41 / 430

Program features 41
Note : Speed controller autotuning works only, when the speed stays within a
specific window during the sequence:
• Speed is max 90% of the motor nominal speed or max speed (group 30
limits), which ever is smaller.
• Speed is min 10% of the motor nominal speed or minimum speed (group 30
limits), which ever is bigger.
Autotune modes
Autotuning can be performed in three different ways depending on the setting
of parameter 25.34 . The selections Smooth , Normal and Tight define how the
drive torque reference should react to a speed reference step after tuning. The
selection Smooth will produce a slow but robust response; Tight will produce a
fast response but possibly too high gain values for some applications. The
figure below shows speed responses at a speed reference step (typically
1…20%).
A: Undercompensated
B: Normally tuned (autotuning)
C: Normally tuned (manually). Better dynamic performance than with B
D: Overcompensated speed controller
%
t
n
C
B
D
n
N
A