YASKAWA SGM7D-30F Product Manual page 86

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.
3.1 FT82 SERVOPACKs with Analog Voltage/Pulse Train References
Confirmation
Set the power supply volt-
Measure the power
age within the specified
supply voltage.
range.
Measure the power Increase the power supply
supply voltage. capacity.
If you have changed the
setting of Pn509 (Momen-
Measure the power
tary Power Interruption
supply voltage.
Hold Time), decrease the
setting.
Replace the SERVO-
PACK and connect a
– reactor to the DC reactor
terminals ( 1 and
the SERVOPACK.
The SERVOPACK may be
– faulty. Replace the SER-
VOPACK.
Check the wiring of the Make sure that the Servo-
Servomotor. motor is correctly wired.
Check the input refer- Reduce the reference
ence. value. Or, adjust the gain.
Reduce the speed refer-
ence input gain and
Check the waveform of
adjust the servo gain. Or,
the motor speed.
reconsider the operating
conditions.
The SERVOPACK may be
– faulty. Replace the SER-
VOPACK.
Decrease the setting of
Pn212 (Encoder Output
Check the encoder out-
Pulses) or Pn281
put pulse setting.
(Encoder Output Resolu-
tion).
Check the encoder out-
put pulse setting and Reduce the motor speed.
the motor speed.
Check for abnormal
Reduce the motor speed.
motor noise, and check
Or, reduce the setting of
the speed and torque
Pn100 (Speed Loop
waveforms during oper-
Gain).
ation.
Check the moment of Set Pn103 (Moment of
inertia ratio or mass Inertia Ratio) to an appro-
ratio. priate value.
Check that the vibra-
Set a suitable vibration
tion detection level
detection level (Pn312 or
(Pn312 or Pn384) is
Pn384).
suitable.
3.1.3 Troubleshooting Alarms
Continued from previous page.
Correction Reference
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*1
–
2) on
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–
*1
–
*1
–
*1
*1
*1
Continued on next page.
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