YASKAWA CACP-JU series, Руководство пользователя

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11.3 Warning Displays
11-37
Inspection, Maintenance, and
Troubleshooting
1 1
11.3.2
Troubleshooting of Warnings
Refer to the following table to identity the cause of a warning and the action to be taken. Contact your
Yaskawa representative if the problem cannot be solved by the described corrective action.
Warning
Number:
Warning Name
(Warning
Description)
Cause Investigative Actions Corrective Actions
A.900:
Position Error
Overflow
The servomotor U, V,
and W wirings is faulty.
Check the servomotor main circuit
cable connection.
Confirm that there is no contact fault
in the motor wiring or encoder wiring.
The SERVOPACK gain
is too low.
Check the SERVOPACK gain.
Increase the servo gain by using the
function such as advanced autotuning.
The position reference
acceleration is too fast.
Reduce the reference acceleration, and
operate the SERVOPACK.
Reduce the reference acceleration.
Setting of the excessive
position error alarm
level (Pn520) is low
against the operating
condition.
Check the alarm level (Pn520) to see
if it is set to an appropriate value.
Set the Pn520 to proper value.
SERVOPACK failure
−
Turn the power supply OFF and then
ON again. If the warning still occurs,
the SERVOPACK may be faulty.
Replace the SERVOPACK.
A.901:
Position Error
Overflow Alarm
at Servo ON
When the servomotor
power turns ON, the
position error exceeded
the parameter setting
(Pn526
×
Pn528/100).
−
Correct the excessive position error
warning level at servo ON (Pn528).
A.910:
Overload
(Warning before
alarm A.710 or
A.720 occurs)
Incorrect wiring or con-
tact fault of servomotor
and encoder.
Check the wiring.
Confirm that the servomotor and
encoder are correctly wired.
Operation beyond the
overload protection
characteristics. Check the servomotor overload char-
acteristics and executed run com-
mand. Reconsider the load conditions and
operating conditions. Or, increase the
servomotor capacity.
Excessive load was
applied during opera-
tion because the servo-
motor was not driven
due to mechanical prob-
lems.
Check the executed operation refer-
ence and servomotor speed.
Remove the mechanical problems.
SERVOPACK failure
−
The SERVOPACK may be faulty.
Replace the SERVOPACK.
A.911:
Vibration
Abnormal vibration was
detected while the ser-
vomotor is rotating. Check for abnormal noise from the
servomotor, and check the speed and
torque waveforms during operation.
Reduce the servomotor speed or
reduce the servo gain by using the
function such as one-parameter tun-
ing.
The moment of inertia
ratio (Pn103) value is
greater than the actual
value or is greatly
changed.
Check the moment of inertia ratio.
Set the moment of inertia ratio
(Pn103) to an appropriate value.