Al-1319 (Ground Fault) - YASKAWA Motoman UP6 Instructions Manual

AL-1319 (GROUND FAULT)

A ground fault is detected when the servo power supply is turned ON.
CAUTION
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.)
Take a corrective measure to
prevent the axis from falling when
the servo is terned ON.
Turn ON the servo power supply with
the 2BC and 3BC base connectors
disconnected.
Alarm?
Yes
Is the grounding for the motor of the
axis where the alarm occurs correct?
Yes
Replace the motor.
Alarm?
Yes
Continue normal
operation.
Replace the internal cables.
Contact your Yaskawa
representative.
Does the alarm occur when
the servo is turned ON?
Is there a ground fault?
(See Fig. 5.)
Yes
No
Protection against
the axis falling
After disconnecting the motor power cable
of the axis where the alarm occurred, turn
No ON the servo power supply.
No
Replace the power supply cable.
No
Yes
Contact your Yaskawa
representative.
No
Alarm?
Yes
Continue normal
operation.
D o e s t h e a l a r m o c c u r
when the servo is OFF?
No
Yes
Disconnect CN29 on the
XIU01 unit.
Alarm?
Alarm?
No
Continue normal
Tester
(Measure the
resistance.)
No
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, and U12, V11, V12, W11,
and W12, to confirm that all the contacts are open.
39
An alarm occurs.
No Yes
Replace the WRCA01 circuit board.
Alarm?
Yes
Replace the SERVOPACK.
Alarm?
Yes
Contact your Yaskawa
representative.
Yes
Replace the SERVOPACK.
Alarm?
Yes
Contact your Yaskawa
representative.
operation.
SERVOPACK
E11 E12 U11 U12 V11 V12 W11 W12
Fig. 5
No
No
Continue normal
operation.
No
Continue normal
operation.