ABB ACS880 Firmware Manual page 278

278 Parameters
No. Name/Value
25.34 Speed controller
autotune mode
Smooth
Normal
Tight
25.37 Mechanical time
constant
0.00 ... 1000.00 s
25.38 Autotune torque
step
0.00 ... 100.00%
25.39 Autotune speed
step
0.00 ... 100.00%
25.40 Autotune repeat
times
1...10
25.53 Torque prop
reference
-30000.0 ...
30000.0%
25.54 Torque integral
reference
-30000.0 ...
30000.0%
25.55 Torque deriv
reference
-30000.0 ...
30000.0%
Description
Defines a control preset for the speed controller autotune
function. The setting affects the way the torque reference will
respond to a speed reference step.
Slow but robust response.
Medium setting.
Fast response. May produce too high a gain value for some
applications.
Mechanical time constant of the drive and the machinery as
determined by the speed controller autotune function. The
value can be adjusted manually.
Mechanical time constant.
Defines an added torque value used by the autotune
function. This value is scaled to motor nominal torque.
Note that the torque used by the autotune function can also
be limited by the torque limits (in parameter group
and nominal motor torque.
Autotune torque step.
Defines a speed value added to the initial speed for the
autotune routine. The initial speed (used when autotune is
activated) plus the value of this parameter is the calculated
maximum speed used by the autotune routine. The
maximum speed can also be limited by the speed limits (in
parameter group 30 Limits) and nominal motor speed.
The value is scaled to motor nominal speed.
Note: The motor will exceed the calculated maximum speed
slightly at the end of each acceleration stage.
Autotune speed step.
Determines how many acceleration/deceleration cycles are
performed during the autotune routine. Increasing the value
will improve the accuracy of the autotune function, and allow
the use of smaller torque or speed step values.
Number of cycles during autotune routine.
Displays the output of the proportional (P) part of the speed
controller. See the control chain diagram on page 649.
This parameter is read-only.
P-part output of speed controller.
Displays the output of the integral (I) part of the speed
controller. See the control chain diagram on page 649.
This parameter is read-only.
I-part output of speed controller.
Displays the output of the derivative (D) part of the speed
controller. See the control chain diagram on page 649.
This parameter is read-only.
D-part output of speed controller.
Def/FbEq16
Normal
0
1
2
-
10 = 1 s
10.00%
30 Limits)
100 = 1%
10.00%
100 = 1%
10
1 = 1
-
See par.
46.03
-
See par.
46.03
-
See par.
46.03