ABB ACS880 N5700 Series, Firmware Manual, Page: 292 / 662

Def / Type
FbEq 16b / 32b Description Name / Range /
Selection No.
- / real32 Maximum torque reference for speed controller
adaptation.
Speed controller gain can be adapted according to the
final unlimited torque reference (
26.1 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 (
25.2
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 652 .
1.000
25.27
Coefficient for K
p
(proportional gain)
Final torque reference
( 26.01) (rpm)
25.25
0
Torque adapt max
limit 25.25
- / - Maximum torque reference for speed controller
adaptation. For scaling, see parameter
46.3 .
0.0 ... 1600.0 %
0.000 s / real32 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 .
Torque adapt filt
time 25.26
100 = 1 s / 1000 = 1 s Filter time for adaptation. 0.000 ... 100.000 s
1.000 / real32 Proportional gain coefficient at 0% torque reference.
See parameter
25.25 Torque adapt max limit .
Kp adapt coef at min
torque 25.27
1000 = 1 / 1000 = 1 Proportional gain coefficient at 0% torque reference. 0.000 ... 10.000
292 Parameters