ABB ACS850 - Page 183

Parameters 183
23.20 PI tune mode Activates the speed controller autotune function.
The autotune will automatically set parameters 23.01 Proport
gain and 23.02 Integration time, as well as 01.31 Mech time
const. If the User autotune mode is chosen, also 23.07 Speed
err Ftime is automatically set.
The status of the autotune routine is shown by parameter
06.03 Speed ctrl stat.
WARNING! The motor will reach the torque and
current limits during the autotune routine. ENSURE
THAT IT IS SAFE TO RUN THE MOTOR BEFORE
PERFORMING THE AUTOTUNE ROUTINE!
Notes:
• Before using the autotune function, the following
parameters should be set:
• All parameters adjusted during the start-up as described
in the ACS850 (Standard Control Program) Quick Start-
up Guide
• 19.01 Speed scaling
• 19.03 MotorSpeed filt
• 19.06 Zero speed limit
• Speed reference ramp settings in group 22 Speed ref
ramp
• 23.07 Speed err Ftime.
• The drive must be in local control mode and stopped
before an autotune is requested.
• After requesting an autotune with this parameter, start the
drive within 20 seconds.
• Wait until the autotune routine is completed (this parameter
has reverted to the value Done). The routine can be
aborted by stopping the drive.
• Check the values of the parameters set by the autotune
function.
See also section Speed controller tuning on page 61.
Done No tuning has been requested (normal operation).
The parameter also reverts to this value after an autotune is
completed.
0
Smooth Request speed controller autotune with preset settings for
smooth operation.
1
Middle Request speed controller autotune with preset settings for
medium-tight operation.
2
Tight Request speed controller autotune with preset settings for
tight operation.
3
User Request speed controller autotune with the settings defined
by parameters 23.21
Tune bandwidth and 23.22 Tune
damping.
4
23.21 Tune bandwidth Speed controller bandwidth for autotune procedure, User
mode (see parameter 23.20 PI tune mode).
A larger bandwidth results in more restricted speed controller
settings.
00.00 … 2000.00
Hz
Tune bandwidth for User autotune mode. 100 = 1 Hz
No. Name/Value Description FbEq