YASKAWA SGM7D-30F Product Manual page 238

Alarm Number:
Possible Cause
Alarm Name
The encoder is wired
incorrectly or there is
faulty contact.
The specifications of
the Encoder Cable are
not correct and noise
entered on it.
The Encoder Cable is
too long and noise
entered on it.
There is variation in
the FG potential
because of the influ-
ence of machines on
A.Cb0:
the Servomotor side,
Encoder Echo- such as a welder.
back Error
Excessive vibration or
shock was applied to
the encoder.
A failure occurred in
the encoder.
A failure occurred in
the SERVOPACK.
When using a Direct
Drive Servomotor, the
setting of Pn205 (Mul-
titurn Limit Setting)
does not agree with
the encoder.
The multiturn limit of
the encoder is differ-
A.CC0:
ent from that of the
SERVOPACK. Or, the
Multiturn Limit
multiturn limit of the
Disagreement
SERVOPACK has
been changed.
A failure occurred in
the SERVOPACK.
3.4 Command Option Attachable-type FT82 SERVOPACKs with INDEXER Modules
Confirmation
Check the wiring of the
encoder.
–
–
Check the condition of
the Encoder Cable and
connectors.
Check the operating
conditions.
–
–
Check the setting of
Pn205.
Check the setting of
Pn205 in the SERVO-
PACK.
–
3.4.3 Troubleshooting Alarms
Continued from previous page.
Correction
Make sure that the
encoder is correctly
wired.
Use a shielded twisted-
pair wire cable or a
screened twisted-pair
cable with conductors of
2
at least 0.12 mm .
Rotary Servomotors: The
Encoder Cable wiring dis-
tance must be 50 m max.
Properly ground the
machine to separate it
from the FG of the
encoder.
Reduce machine vibra-
tion.
Correctly install the Ser-
vomotor or linear encoder.
Turn the power supply to
the SERVOPACK OFF and
ON again. If an alarm still
occurs, the Servomotor
may be faulty. Replace the
Servomotor.
Turn the power supply to
the SERVOPACK OFF and
ON again. If an alarm still
occurs, the SERVOPACK
may be faulty. Replace the
SERVOPACK.
Correct the setting of
Pn205 (0 to 65,535).
Change the setting if the
alarm occurs.
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.
Reference
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