YASKAWA SGM7D-30F Product Manual page 180

Alarm Number:
Possible Cause
Alarm Name
The power supply
voltage went below
the specified range.
The power supply
voltage dropped
during operation.
A.410:
Undervoltage
A momentary power
(Detected in the
interruption occurred.
main circuit
power supply
section of the
SERVOPACK.)
The SERVOPACK
fuse is blown out.
A failure occurred in
the SERVOPACK.
The order of phases
U, V, and W in the
motor wiring is not
correct.
A reference value that
exceeded the over-
A.510:
speed detection level
Overspeed
was input.
(The motor
exceeded the
maximum speed.)
The motor exceeded
the maximum speed.
A failure occurred in
the SERVOPACK.
The encoder output
pulse frequency
exceeded the limit.
A.511:
Encoder Output
The encoder output
Pulse Overspeed
pulse frequency
exceeded the limit
because the motor
speed was too high.
Abnormal oscillation
was detected in the
motor speed.
The setting of Pn103
(Moment of Inertia
A.520:
Ratio) is greater than
Vibration Alarm
the actual moment of
inertia or was greatly
changed.
The vibration detec-
tion level (Pn312 or
Pn384) is not suitable.
3.3 FT82 SERVOPACK with MECHATROLINK-III Communications References
Confirmation
Measure the power
supply voltage.
Measure the power
supply voltage.
Measure the power
supply voltage.
–
–
Check the wiring of the
Servomotor.
Check the input refer-
ence.
Check the waveform of
the motor speed.
–
Check the encoder out-
put pulse setting.
Check the encoder out-
put pulse setting and
the motor speed.
Check for abnormal
motor noise, and check
the speed and torque
waveforms during oper-
ation.
Check the moment of
inertia ratio or mass
ratio.
Check that the vibra-
tion detection level
(Pn312 or Pn384) is
suitable.
3.3.3 Troubleshooting Alarms
Continued from previous page.
Correction
Set the power supply volt-
age within the specified
range.
Increase the power supply
capacity.
If you have changed the
setting of Pn509 (Momen-
tary Power Interruption
Hold Time), decrease the
setting.
Replace the SERVO-
PACK and connect a
reactor to the DC reactor
terminals ( 1 and 2) on
the SERVOPACK.
The SERVOPACK may be
faulty. Replace the SER-
VOPACK.
Make sure that the Servo-
motor is correctly wired.
Reduce the reference
value. Or, adjust the gain.
Reduce the speed refer-
ence input gain and
adjust the servo gain. Or,
reconsider the operating
conditions.
The SERVOPACK may be
faulty. Replace the SER-
VOPACK.
Decrease the setting of
Pn212 (Encoder Output
Pulses) or Pn281
(Encoder Output Resolu-
tion).
Reduce the motor speed.
Reduce the motor speed.
Or, reduce the setting of
Pn100 (Speed Loop
Gain).
Set Pn103 (Moment of
Inertia Ratio) to an appro-
priate value.
Set a suitable vibration
detection level (Pn312 or
Pn384).
Continued on next page.
Reference
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