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Alarm Number:
Possible Cause
Alarm Name
A.C51:
The overtravel signal
Overtravel
was detected during
Detected during
polarity detection.
Polarity Detection
The servo was turned
ON under the follow-
A.C52:
ing circumstances.
• Before polarity
Polarity Detec-
detection was com-
tion Not Com-
pleted
pleted
• Before /P-DET was
input
The travel distance
A.C53:
exceeded the setting
Out of Range of
of Pn48E (Polarity
Motion for Polar-
Detection Range) in
the middle of detec-
ity Detection
tion.
A.C54:
An external force was
applied to the Servo-
Polarity Detec-
motor.
tion Failure 2
A failure occurred in
the encoder.
A.C80:
Encoder Clear
Error or Multiturn
Limit Setting Error
A failure occurred in
the SERVOPACK.
Confirmation
Wire the overtravel sig-
nals. Execute polarity
Check the overtravel
detection at a position
position.
where an overtravel sig-
nal would not be
detected.
–
Input the /P-DET signal.
Increase the setting of
Pn48E (Polarity Detection
Range). Or, increase the
–
setting of Pn481 (Polarity
Detection Speed Loop
Gain).
Increase the setting of
Pn495 (Polarity Detection
Confirmation Force Refer-
ence). Increase the setting
of Pn498 (Polarity Detec-
–
tion Allowable Error
Range).
Increasing the allowable
error will also increase the
motor temperature.
Turn the power supply to
the SERVOPACK OFF and
ON again.
If an alarm still occurs, the
–
Servomotor or linear
encoder may be faulty.
Replace the Servomotor
or linear encoder.
Turn the power supply to
the SERVOPACK OFF and
ON again.
If an alarm still occurs, the
–
SERVOPACK may be
faulty.
Replace the SERVO-
PACK.
12.2 Alarm Displays
12.2.2 Troubleshooting Alarms
Continued from previous page.
Reference
Correction
for Correc-
tion
page 4-31
page 5-28
–
–
–
–
12
12-31
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Table of Contents
Troubleshooting
