15.2 Alarm Displays
15.2.2 Troubleshooting Alarms
15-30
C51 hex:
Overtravel
Detected during
Polarity Detection
The overtravel signal
was detected during
polarity detection.
Check the overtravel
position.
Wire the overtravel sig-
nals. Execute polarity
detection at a position
where an overtravel sig-
nal would not be
detected.
C52 hex:
Polarity Detec-
tion Not Com-
pleted
The servo was turned
ON when using an
absolute linear
encoder, Pn587 (2587
hex) was set to
n.
0 (Do not
detect polarity), and
the polarity had not
been detected.
–
When using an absolute
linear encoder, set Pn587
(2587 hex) to n.
1
(Detect polarity)
–
C53 hex:
Out of Range of
Motion for Polarity
Detection
The travel distance
exceeded the setting
of Pn48E (248E hex)
(Polarity Detection
Range) in the middle
of detection.
–
Increase the setting of
Pn48E (248E hex) (Polar-
ity Detection Range). Or,
increase the setting of
Pn481 (2481 hex) (Polarity
Detection Speed Loop
Gain).
–
C54 hex:
Polarity Detec-
tion Failure 2
An external force was
applied to the Servo-
motor.
–
Increase the setting of
Pn495 (2495 hex) (Polarity
Detection Confirmation
Force Reference).
Increase the setting of
Pn498 (2498 hex) (Polarity
Detection Allowable Error
Range). Increasing the
allowable error will also
increase the motor tem-
perature.
–
C80 hex:
Encoder Clear
Error or Multiturn
Limit Setting Error
A failure occurred in
the encoder.
–
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 Servo-
motor or linear encoder.
–
A failure occurred in
the SERVOPACK.
–
Turn the power supply to
the SERVOPACK OFF and
ON again. If an alarm still
occurs, the SERVOPACK
may be faulty. Replace the
SERVOPACK.
–
Continued on next page.
Continued from previous page.
Alarm Code:
Alarm Name
Possible Cause
Confirmation
Correction
Reference