3  Utility Function Mode
3.2.27  Advanced Autotuning (Fn201)
3-64
(3) Failure in Operation
 When “NO-OP” Flashes on the Display
8
Gain Adjustment
When the or Key is pressed 
according to the sign (+ or -) of the value 
set for stroke (travel distance), the calcu-
lated value of the moment of inertia ratio 
will be saved in the SERVOPACK and the 
auto run operation will restart. While the 
servomotor is running, the filters, and gains 
will be automatically set. “ADJ” will flash 
during the auto setting operation.
Note: Precise adjustments cannot be made 
and “Error” will be displayed as the 
status if there is machine resonance 
when starting adjustments. If that 
occurs, make adjustments using 
one-parameter tuning (Fn203).
9
When the adjustment has been completed 
normally, the servomotor power will turn 
OFF, and “END” will flash for approxi-
mately two seconds and then “ADJ” will 
be displayed on the status display.
10
Press the
 Key. The adjusted values 
will be saved in the SERVOPACK. 
“DONE” will flash for approximately two 
seconds, and “BB” will be displayed.
Note: Press the   Key to not save the 
values. The display returns to the 
main menu of the utility function 
mode.
11 Turn ON the SERVOPACK power supply again after executing advanced autotuning.
Probable Cause Corrective Actions
The main circuit power supply was OFF. Turn ON the main circuit power supply.
An alarm or warning occurred. Remove the cause of the alarm or the warning.
Overtraveling occurred. Remove the cause of the overtravel.
Gain setting 2 was selected by gain switching. Disable the automatic gain switching.
The HWBB function operated. Disable the HWBB function.
(cont’d)
Step Display after Operation Keys Operation
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