AL-1321 (OVERCURRENT (AMP))
The current is more than the allowable maximum current for the
SERVOPACK, or the power transistor is overheated due to overloading.
Before checking the wiring
connections, turn OFF the control
power supply.
Use a tester to confirm that all the
LEDs on the SERVOPACK and
converter are unlit and that no
charged electricity remains.
(It may take a few minutes until all
the electricity is discharged.)
Check for overheating
Take a corrective measure to
prevent the axis from falling when
the servo is terned ON.
CAUTION
Tester
(Measure the
resistance.)
An alarm occurs.
Does the alarm occur
when the servo is OFF?
YesNo
Replace the WRCA01 circuit board.
Alarm?
NoYes
Is there any ground fault?
(See Fig. 7.)
Yes
No
SERVOPACK
E11
Fig. 7
E12 U11 U12 V11 V12
W11 W12
With the S-axis, for example, disconnect all the motor power
cables of the S-axis from the terminal block. Measure the
resistance between E11 and U11, U12, V11, V12, W11, and
W12, and between E12 and U11, U12, V11, V12, W11, and
W12, to confirm that all the contacts are open.
Disconnect CN29 on the
XIU01 unit.
After disconnecting the motor power cable
of the axis where the alarm occurred, turn
ON the servo power supply.
Alarm?
No
Yes
Replace the SERVOPACK.
Alarm?
NoYes
Contact your Yaskawa
representative.
Continue normal
operation.
Turn ON the servo power supply with
2BC and 3BC base connectors
disconnected.
Alarm?
NoYes
Replace the power supply cable.
Alarm?
NoYes
Continue normal
operation.
Contact your Yaskawa
representative.
Is the grounding for the motor of the
axis where the alarm occurs correct?
Yes
No
Replace the internal cables.
Continue normal
operation.
Replace the SERVOPACK.
Alarm?
NoYes
Contact your Yaskawa
representative.
Protection against
the axis falling
Continue normal
operation.
Replace the motor.
Alarm
NoYes
Contact your Yaskawa
representative.
Continue normal
operation.
NoYes
Turn OFF the control power supply
and wait 10 minutes.
Alarm?
NoYes
Continue normal
operation.
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