ABB ACS880 Firmware Manual page 333

No. Name / Range /
Selection
25.25 Torque adapt max
limit
0.0 ... 1600.0 %
25.26 Torque adapt filt
time
0.000 ... 100.000 s
25.27 Kp adapt coef at min
torque
0.000 ... 10.000
Description
Maximum torque reference for speed controller
adaptation.
Speed controller gain can be adapted according to the
final unlimited 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
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
torque.
When the torque reference is equal to or above
Torque adapt max limit, no adaptation takes place (the
coefficient is 1).
Between 0% and 25.25 Torque adapt max
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
See also the block diagram on page 750.
Coefficient for K (proportional gain)
p
1.000
25.27
0
Maximum torque reference for speed controller
adaptation. For scaling, see parameter 46.3.
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
Filter time for adaptation.
Proportional gain coefficient at 0% torque reference.
See parameter 25.25 Torque adapt max
Proportional gain coefficient at 0% torque reference.
(26.1 Torque reference
(25.2
25.27 Kp adapt coef at min
25.25
limit, the
time.
Final torque reference
25.25
limit.
limit.
Parameters 333
Def / Type
FbEq 16b / 32b
- / real32
( 26.01 ) (rpm)
- / -
0.000 s / real32
100 = 1 s / 1000 = 1 s
1.000 / real32
1000 = 1 / 1000 = 1