3.2  Operations
3-63
9
head1
3
Utility Function Mode
6
Display example:
After the moment of inertia is calcu-
lated.
Calculates the moment of inertia.
Press the Key if a positive (+) value 
is set in STROKE (travel distance), or 
press the Key if a negative (-) value 
is set. Calculation of the moment of inertia 
will start. While the moment of inertia is 
being calculated, the set value for Pn103 
will flash and “ADJ” will flash instead of 
“RUN.” When calculating the moment of 
inertia is completed, the display will stop 
flashing and the moment of inertia is dis-
played. The servomotor will remain ON, 
but the auto run operation will be stopped 
temporarily.
Notes:
• The wrong key for the set travel direc-
tion is pressed, the calculation will not 
start.
• If the moment of inertia is not calculated 
(Jcalc = OFF), the set value for Pn103 
will be displayed.
• If “NO-OP” or “Error” is displayed dur-
ing operation, press the   Key to 
cancel the function. Refer to (3) Failure 
in Operation and take a corrective action 
to enable operation.
7
After the servomotor is temporarily 
stopped, press the
 Key to save the 
calculated moment of inertia ratio in the 
SERVOPACK. “DONE” will flash for one 
second, and “ADJ” will be displayed again.
Note: To end operation by calculating 
only the moment of inertia ratio and 
without adjusting the gain, press the 
 Key to end operation.
(cont’d)
Step Display after Operation Keys Operation
㧭㧰㧶   㧭㨐㨢㨍㨚㨏㨑㨐  㧭㨀
㧼㨚㧝㧜㧟㧩㧜㧜㧟㧜㧜
㧼㨚㧝㧜㧜㧩㧜㧜㧠㧜㧜
㧼㨚㧝㧜㧝㧩㧜㧜㧞㧜㧜
㧼㨚㧝㧠㧝㧩㧜㧜㧡㧜㧜