ABB ACS880-01 Series, Firmware Instructions

Page: 276 / 664

276 Parameters
25.25 Torque adapt max
limit Maximum torque reference for speed controller adaptation.
Speed controller gain can be adapted according to the final
unlimited torque reference (
26.01 Torque reference to TC ).
This can be used to smooth out disturbances caused by a
small load and backlashes.
The functionality involves multiplying the gain (
25.02 Speed
proportional gain ) by a coefficient within a certain torque
range.
When the torque reference is 0%, the gain is multiplied by the
value of parameter
25.27 Kp adapt coef at min torque .
When the torque reference is equal to or above 25.25 Torque
adapt max limit , no adaptation takes place (the coefficient is
1).
Between 0% and
25.25 Torque adapt max limit , the
coefficient for the gain is calculated linearly on the basis of
the breakpoints.
Filtering can be applied on the torque reference using
parameter
25.26 Torque adapt filt time .
See also the block diagram on page 650 .
0.0%
0.0 … 1600.0% Maximum torque reference for speed controller adaptation. See par.
46.03
25.26 Torque adapt filt
time Defines a filter time constant for the adaptation, in effect
adjusting the rate of change of the gain.
See parameter
25.25 Torque adapt max limit .
0.000 s
0.000 … 100.000 s Filter time for adaptation. 100 = 1 s
25.27 Kp adapt coef at
min torque Proportional gain coefficient at 0% torque reference.
See parameter
25.25 Torque adapt max limit .
1.000
0.000 … 10.000 Proportional gain coefficient at 0% torque reference. 1000 = 1
No. Name/Value Description Def / FbEq16
Coefficient for K
p
(proportional gain)
Final torque reference
( 26.01 ) (rpm)
25.25 Torque
adapt max limit
1.000
0
25.27 Kp adapt coef at min torque