Tuning Procedure For Oscillation Damping; Settings And Diagnostics; Resonance Frequency Elimination - ABB ACS880 Firmware Manual

Tuning procedure for oscillation damping

Calculate the oscillation frequency from the signal (use
the Drive Composer PC tool) and set 26.55
Set 26.56
Increase 26.57 gradually so that the algorithm starts to
take effect
Oscillation amplitude decreases
Increase 26.57 and adjust 26.56 if necessary
Increase 26.57 to suppress the oscillation
totally
1)
If the phasing of a DC oscillation cannot be determined by measuring, the value
of 0 degrees is usually a suitable initial value.
Note: Changing the speed error low-pass filter time constant or the integration
time of the speed controller can affect the tuning of the oscillation damping
algorithm. It is recommended to tune the speed controller before the oscillation
damping algorithm. (The speed controller gain can be adjusted after the tuning
of this algorithm.)

Settings and diagnostics

Parameters: 26.51 Oscillation damping...26.58 Oscillation damping
output (page 345).
￭

Resonance frequency elimination

The control program contains a notch filter function for removing the resonance
frequencies from the speed error signal.
Settings and diagnostics
Parameters: 24.13 RFE speed filter...24.17 Damping of pole (page
Select the input by 26.53
Activate algorithm by 2 6.51
Set 26.57 to 0
1)
Oscillation amplitude increases
Try other values for 26.56
Program features 91
321).