3.2  Operating Procedures for Utility Functions 
3.2.28  Advanced Autotuning without Reference (Fn201)
3-74
6
Press the   Key if the stroke is 
set to a positive value, or press the 
 Key if the stroke is set to a 
negative value.
Calculation of the moment of inertia 
will start.
While the moment of inertia is being 
calculated, the setting of Pn103 will 
flash and 1:ADJ will flash instead of 
1:RUN.
When calculating the moment of 
inertia has been completed, the dis-
play will stop flashing and the 
moment of inertia will be displayed. 
The servo will remain ON, but auto-
matic operation will stop temporar-
ily.
Note: 1. Calculating the moment of iner-
tia will not start if the sign of the 
stroke does not agree with the 
key that is pressed (  Key 
or  Key).
2. If Jcalc is set to OFF, calculat-
ing the moment of inertia will 
not start and the setting of 
Pn103 will be displayed.
3. If NO-OP or ERROR is dis-
played during operation, press 
the   Key to cancel the 
operation and refer to the fol-
lowing section to correct the 
problem.
3.2.28 Advanced Auto-
tuning without Reference 
(Fn201) -Troubleshooting 
Problems in the Opera-
tion on page 3-76
Continued on next page.
Continued from previous page.
Step Operation Result
1:RUN              AAT
Pn103 =003 00
Pn100=0040.0 
Pn101=0020.0
Pn141=0050.0
Display Example: After Calcu-
lating the Moment of Inertia