ABB ACS880 - Page 294

Def / Type
FbEq 16b / 32b
DescriptionName / Range /
Selection
No.
00.Off
11.On
See Terms and abbreviations (page 132).
Other [bit]
Normal / uint16Defines a control preset for the speed controller autotune
function. The setting affects the way the torque reference
will respond to a speed reference step.
Speed controller
autotune mode
25.34
0Slow but robust response.Smooth
1Medium setting.Normal
2Fast response. May produce too high a gain value for some
applications.
Tight
0.00 s / real32Mechanical 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
25.37
10 = 1 s / 100 = 1 sMechanical time constant.0.00 ... 1000.00 s
10.00 % / real32Defines 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 30
Limits) and nominal motor torque.
Autotune torque step25.38
100 = 1 % / 100 = 1 %Autotune torque step.0.00 ... 100.00 %
10.00 % / real32Defines a speed value added to the initial speed for the
autotune routine. The initial speed (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 step25.39
100 = 1 % / 100 = 1 %Autotune speed step.0.00 ... 100.00 %
10 / uint16Determines 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.
Autotune repeat times25.40
1 = 1 / 1 = 1Number of cycles during autotune routine.1...10
- / real32ReservedTorque reference
Autotune2
25.41
Selected / uint32Selects a source that enables/disables the integral (I) part
of the speed controller.
0 = I-part disabled
1 = I-part enabled
Integral term enable25.42
00Not selected
11Selected
2
Digital input DI1 (10.2 DI delayed status, bit 0).
DI1
294 Parameters