YASKAWA SGM7D-30F Product Manual page 232

Alarm Number:
Possible Cause
Alarm Name
The encoder malfunc-
tioned.
A.840:
Encoder Data
Alarm
(Detected at the
encoder.)
The encoder malfunc-
tioned due to noise.
The Servomotor
speed was 200 min
or higher when the
control power supply
was turned ON.
A.850:
Encoder Over-
speed
A failure occurred in
(Detected at the
the encoder.
encoder when
the control power
supply is turned
ON.)
A failure occurred in
the SERVOPACK.
The surrounding air
temperature around
the Servomotor is too
high.
The Servomotor load
is greater than the
rated load.
A.860:
Encoder Over-
heated
A failure occurred in
(Detected at the
the encoder.
encoder.)
A failure occurred in
the SERVOPACK.
3.4 Command Option Attachable-type FT82 SERVOPACKs with INDEXER Modules
Confirmation
–
–
-1
Check the motor speed
when the power supply
is turned ON.
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–
Measure the surround-
ing air temperature
around the Servomotor.
Use the accumulated
load ratio to check the
load.
–
–
3.4.3 Troubleshooting Alarms
Continued from previous page.
Correction
Turn the power supply to
the SERVOPACK OFF and
ON again. If an alarm still
occurs, the Servomotor
may be faulty. Replace the
Servomotor.
Correct the wiring around
the encoder by separating
the Encoder Cable from
the Servomotor Main Cir-
cuit Cable or by ground-
ing the encoder.
Reduce the Servomotor
speed to a value less than
-1
200 min , and turn ON
the control power supply.
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.
Reduce the surrounding
air temperature of the
Servomotor to 40°C or
less.
Operate the Servo Drive
so that the motor load
remains within the speci-
fied range.
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.
Continued on next page.
Reference
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*1
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3
3-163