ABB ACS880 N5700 Series, Firmware Manual, Page: 294 / 662

Def / Type
FbEq 16b / 32b Description Name / Range /
Selection No.
Off / uint32 Activates (or selects a source that activates) the speed
controller autotune function. See section
Speed
controller autotune (page 79) .
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
0 0. Off
1 1. On
See Terms and abbreviations (page 130) . Other [bit]
Normal / uint16 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. Speed controller
autotune mode 25.34
0 Slow but robust response. Smooth
1 Medium setting. Normal
2 Fast response. May produce too high a gain value for
some applications. Tight
0.00 s / real32 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 25.37
10 = 1 s / 100 = 1 s Mechanical time constant. 0.00 ... 1000.00 s
294 Parameters