YASKAWA SGD7S Product Manual page 500

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-
tion Not Com- detection was com-
pleted pleted
• Before /P-DET was
input
The travel distance
A.C53:
exceeded the setting
of Pn48E (Polarity
Out of Range of
Detection Range) in
Motion for Polar-
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 tem-
perature.
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.
Turn the power supply to
the SERVOPACK OFF and
ON again. If an alarm still
–
occurs, the SERVOPACK
may be faulty. Replace the
SERVOPACK.
12.2 Alarm Displays
12.2.2 Troubleshooting Alarms
Continued from previous page.
Correction Reference
page 4-37
page 5-29
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Continued on next page.
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