ABB ACS880 - Page 335

Def / Type
FbEq 16b / 32b
DescriptionName / Range /
Selection
No.
Off / uint32Activates (or selects a source that activates) the speed
controller autotune function. See section Speed
controller autotune (page 87).
The autotune will automatically set parameters 25.2
Speed proportional gain, 25.3 Speed integration time
and 25.37 Mechanical time constant.
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 30
Limits) have been set
• speed feedback filtering (parameter group 90
Feedback selection), speed error filtering (24
Speed reference conditioning) and zero speed (21
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.
Speed controller
autotune
25.33
00.Off
11.On
See Terms and abbreviations (page 169).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
Parameters 335