YASKAWA SGD7S-1R9D Product Manual page 527

Warning Number:
Possible Cause
Warning Name
The position devi-
ation exceeded
the parameter set-
901 hex:
tings (Pn526
Position Deviation
(2526 hex) ×
Overflow Alarm at
Pn528 (2528 hex)/
Servo ON
100) when the
servo was turned
ON.
The wiring is not
correct or there is
a faulty contact in
the motor or
encoder wiring.
Operation was
performed that
exceeded the
overload protec-
tion characteris-
tics.
An excessive load
910 hex:
was applied
Overload (warning
during operation
before an A.710 or
because the Ser-
A.720 alarm occurs)
vomotor was not
driven because of
mechanical prob-
lems.
The overload
warning level
(Pn52B (252B
hex)) is not suit-
able.
A failure occurred
in the SERVO-
PACK.
Abnormal vibra-
tion was detected
during motor
operation.
The setting of
Pn103 (2103 hex)
(Moment of Iner-
tia Ratio) is
911 hex:
greater than the
Vibration
actual moment of
inertia or was
greatly changed.
The vibration
detection level
(Pn312 (2312 hex)
or Pn384 (2384
hex)) is not suit-
able.
Confirmation
Optimize the setting of
Pn528 (2528 hex) (Exces-
–
sive Position Error Warning
Level at Servo ON).
Make sure that the Servo-
Check the wiring. motor and encoder are cor-
rectly wired.
Check the motor over- Reconsider the load and
load characteristics and operating conditions. Or,
Run command. increase the motor capacity.
Check the operation
Remove the mechanical
reference and motor
problem.
speed.
Check that the overload Set a suitable overload
warning level (Pn52B warning level (Pn52B (252B
(252B hex)) is suitable. hex)).
The SERVOPACK may be
– faulty. Replace the SERVO-
PACK.
Check for abnormal
motor noise, and check Reduce the motor speed.
the speed and torque Or, reduce the servo gain
waveforms during oper- with custom tuning.
ation.
Check the moment of
Correct the setting of
inertia ratio or mass
Pn103 (2103 hex).
ratio.
Check that the vibration Set a suitable vibration
detection level (Pn312 detection level (Pn312
(2312 hex) or Pn384 (2312 hex) or Pn384 (2384
(2384 hex)) is suitable. hex)).
15.3 Warning Displays
15.3.2 Troubleshooting Warnings
Continued from previous page.
Correction Reference
–
–
–
–
page 5-40
–
page 8-41
page 8-16
page 6-46
Continued on next page.
15
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