User Manual

Rockwell Automation Publication 20P-UM001K-EN-P - July 2014 111
Drive Start Up Chapter 2
Auto Tuning Faults
Following is a list of faults that may display during the speed regulator auto
tuning test. In some cases, the drive’s control circuits may detect a value(s)
that is out of range for the configuration settings during the speed
regulator auto tuning test. In these cases, make the suggested adjustments
and repeat the test. If the fault occurs again, complete the Fine Tuning the
Regulators procedures beginning on page 331
.
Fault No. Description Action
STune Overspeed 56 The measured motor speed is too high
during the speed regulator auto tuning
procedure.
Decrease the value of Par 1048 [Autotune Cur
Lim] and repeat the auto tune procedure.
STune Stalled 57 The drive stalled during the speed
regulator auto tuning procedure.
Increase the value of Par 1048 [Autotune Cur
Lim] and repeat the auto tune procedure.
STune LoadHi 58 One of the following has occurred:
• The loading torque value is too high at
zero speed to complete the speed
regulator auto tuning procedure.
Decrease the load torque, where applicable,
and repeat the auto tune procedure.
• Par 107 [Speed Zero Level] and/or 108
[Speed Zero Delay] is set too high.
Set Pars 107 and 108 to their default values
when performing the Speed Loop Autotuning
function.
STune CurLimit 59 One of the following has occurred:
• The value of Par 1048 [Autotune Cur
Lim] for auto tuning the speed
regulator is set too high.
Decrease the value of Par 1048 [Autotune Cur
Lim] and repeat the auto tune procedure.
• Par 107 [Speed Zero Level] and/or 108
[Speed Zero Delay] is set too high.
Set Pars 107 and 108 to their default values
when performing the Speed Loop Autotuning
function.
STune FrictionLo 60 The friction value attained during the auto
tuning procedure is zero or lower than the
control precision limit.
Decrease the value of Par 1048 [Autotune Cur
Lim] and repeat the auto tune procedure.
STune Timeout 61 The speed regulator auto tuning procedure
did not complete within the available time.
Verify the value in Par 1048 [Autotune Cur
Lim]. If this value is set to low, the motor will
not be able to reach a maximum speed of
33% of the lower of the values in Par 45 [Max
Ref Speed] or Par 3 [Max Speed Fwd] or Par 4
[Max Speed Rev] and not be able to complete
the test. Set these values appropriately and
repeat the auto tuning procedure.
STune Aborted 62 The speed regulator auto tuning procedure
has been stopped by the user.
Informational only.