ABB ACS880 Firmware Manual page 335

No. Name / Range /
Selection
25.33 Speed controller
autotune
Off
On
Other [bit]
25.34 Speed controller
autotune mode
Smooth
Normal
Tight
25.37 Mechanical time
constant
0.00 ... 1000.00 s
Description
Activates (or selects a source that activates) the speed
controller autotune function. See section
controller autotune (page
The autotune will automatically set parameters
Speed proportional gain,
and 25.37 Mechanical time
The prerequisites for performing the autotune routine
are:
• the motor identification run (ID run) has been
successfully completed
• the speed and torque limits (parameter group
Limits) have been set
• speed feedback filtering (parameter group
Feedback selection), speed error filtering
Speed reference conditioning) and zero speed
Start/stop mode) have been set, and
• the drive has been started and is running in speed
control mode.
WARNING!
The motor and machinery will run against the
torque and speed limits during the autotune
routine. MAKE SURE IT IS SAFE TO ACTIVATE
THE AUTOTUNE FUNCTION!
The autotune routine can be aborted by stopping the
drive.
0→1 = Activate speed controller autotune
Note: The value does not revert to 0 automatically.
0.
1.
See Terms and abbreviations (page
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.
Speed
87).
25.3 Speed integration time
constant.
(24
169).
Parameters 335
Def / Type
FbEq 16b / 32b
Off / uint32
25.2
30
90
(21
0
1
Normal / uint16
0
1
2
0.00 s / real32
10 = 1 s / 100 = 1 s