YASKAWA E-7S SERVOPACK SGD7S, Product Manual

Page: 533 / 671

15.2 Alarm Displays
15.2.2 Troubleshooting Alarms
15-22
A.510:
Overspeed
(The motor
exceeded the
maximum speed.)
The order of phases
U, V, and W in the
motor wiring is not
correct.
Check the wiring of the
Servomotor. Make sure that the Servo-
motor is correctly wired.
–
A reference value that
exceeded the over-
speed detection level
was input.
Check the input refer-
ence. Reduce the reference
value. Or, adjust the gain.
–
The motor exceeded
the maximum speed. Check the waveform of
the motor speed.
Adjust the servo gains. Or,
reconsider the operating
conditions.
–
A failure occurred in
the SERVOPACK.
–
The SERVOPACK may be
faulty. Replace the SER-
VOPACK.
–
A.511:
Encoder Output
Pulse Overspeed
The encoder output
pulse frequency
exceeded the limit.
Check the encoder out-
put pulse setting.
Decrease the setting of
Pn212 (Encoder Output
Pulses) or Pn281
(Encoder Output Resolu-
tion).
page 6-20
The encoder output
pulse frequency
exceeded the limit
because the motor
speed was too high.
Check the encoder out-
put pulse setting and
the motor speed.
Reduce the motor speed. –
A.520:
Vibration Alarm
Abnormal oscillation
was detected in the
motor speed.
Check for abnormal
motor noise, and check
the speed and torque
waveforms during oper-
ation.
Reduce the motor speed.
Or, reduce the setting of
Pn100 (Speed Loop
Gain).
page 8-73
The setting of Pn103
(Moment of Inertia
Ratio) is greater than
the actual moment of
inertia or was greatly
changed.
Check the moment of
inertia ratio or mass
ratio. Set Pn103 (Moment of
Inertia Ratio) to an appro-
priate value.
page 8-15
The vibration detec-
tion level (Pn312 or
Pn384) is not suitable.
Check that the vibra-
tion detection level
(Pn312 or Pn384) is
suitable.
Set a suitable vibration
detection level (Pn312 or
Pn384).
page 6-32
A.521:
Autotuning Alarm
(Vibration was
detected while
executing the
custom tuning,
Easy FFT, or the
tuning-less func-
tion.)
The Servomotor
vibrated considerably
while performing the
tuning-less function.
Check the waveform of
the motor speed.
Reduce the load so that
the moment of inertia ratio
is within the allowable
value. Or increase the
load level or reduce the
rigidity level in the tuning-
less level settings.
page 8-12
The Servomotor
vibrated considerably
while performing cus-
tom tuning or Easy
FFT.
Check the waveform of
the motor speed.
Check the operating pro-
cedure of corresponding
function and implement
corrections.
page 8-41,
page 8-89
A.550:
Maximum Speed
Setting Error
The setting of Pn385
(Maximum Motor
Speed) is greater than
the maximum speed.
Check the setting of
Pn385, and the upper
limits of the maximum
motor speed setting
and the encoder output
resolution setting.
Set Pn385 to a value that
does not exceed the max-
imum motor speed.
page 6-14
Continued on next page.
Continued from previous page.
Alarm Number:
Alarm Name
Possible Cause Confirmation Correction Reference