3 Utility Function Mode
3.2.28 Advanced Autotuning by Reference (Fn202)
3-70
(3) Failure in Operation
When “NO-OP” Flashes on the Display
When “Error” Flashes on the Display
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.
HWBB operated. Disable the HWBB function.
Error Probable Cause Corrective Actions
The gain adjustment
was not successfully
completed.
Machine vibration is occur-
ring or the positioning com-
pleted signal (/COIN) is
turning ON and OFF when
the servomotor is stopped.
• Increase the set value for
Pn522.
• Change the mode from 2 to 3.
• If machine vibration occurs,
suppress the vibration with the
anti-resonance control adjust-
ment function and the vibra-
tion suppression function.
The positioning
completed signal
(/COIN) did not turn ON
within approximately 10
seconds after
positioning adjustment
was completed.
The positioning completed
width is too narrow or propor-
tional control (P control) is
being used.
• Increase the set value for
Pn522.
• Set 0 to V_PPI of Option field.
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