YASKAWA SGM7D-30F Product Manual page 287

3.5 FT83 SERVOPACKs with Analog Voltage/Pulse Train References
3.5.3 Troubleshooting Alarms
Alarm Number:
Alarm Name
A.410:
Undervoltage
(Detected in the
main circuit
power supply
section of the
SERVOPACK.)
A.510:
Overspeed
(The motor
exceeded the
maximum speed.)
A.511:
Encoder Output
Pulse Overspeed
A.520:
Vibration Alarm
3-218
Possible Cause
The power supply
Measure the power
voltage went below
supply voltage.
the specified range.
The power supply
Measure the power
voltage dropped
supply voltage.
during operation.
A momentary power Measure the power
interruption occurred. supply voltage.
The SERVOPACK
–
fuse is blown out.
A failure occurred in
–
the SERVOPACK.
The order of phases
U, V, and W in the Check the wiring of the
motor wiring is not Servomotor.
correct.
A reference value that
exceeded the over- Check the input refer-
speed detection level ence.
was input.
The motor exceeded Check the waveform of
the maximum speed. the motor speed.
A failure occurred in
–
the SERVOPACK.
The encoder output
Check the encoder out-
pulse frequency
put pulse setting.
exceeded the limit.
The encoder output
pulse frequency Check the encoder out-
exceeded the limit put pulse setting and
because the motor the motor speed.
speed was too high.
Check for abnormal
Abnormal oscillation motor noise, and check
was detected in the the speed and torque
motor speed. waveforms during oper-
ation.
The setting of Pn103
(Moment of Inertia
Check the moment of
Ratio) is greater than
inertia ratio or mass
the actual moment of
ratio.
inertia or was greatly
changed.
Check that the vibra-
The vibration detec-
tion detection level
tion level (Pn312 or
(Pn312 or Pn384) is
Pn384) is not suitable.
suitable.
Confirmation
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
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 from previous page.
Correction Reference
–
–
*1
–
2) on
–
–
*1
–
*1
–
*1
*1
*1
Continued on next page.