Mitsubishi Electric MELSERVO-J3W Series Instruction Manual page 146

8. TROUBLESHOOTING
Alarm No.12
Alarm description
Display Name
12.1 CPU built-in RAM
error
12.2 CPU data RAM
error
12.3 Custom IC RAM
error
Alarm No.13
Alarm description
Display Name
13.1 Clock error
Name: Memory error 1 (RAM)
Interior part of the servo amplifier (CPU) is faulty.
Interior part of the servo amplifier (custom IC) is faulty.
Cause
(1) Part in the servo amplifier
is faulty.
(2) Fault is generated from
the surrounding
environment.
(1) Part in the servo amplifier
is faulty.
(2) Fault is generated from
the surrounding
environment.
(1) Part in the servo amplifier
is faulty.
(2) Fault is generated from
the surrounding
environment.
Name: Clock error
Fault is found in the printed board.
There is a clock error transmitted from the controller.
Cause
(1) Printed board is faulty.
(2) Parts are faulty.
(3) Clock error transmitted
from the controller.
(4) Fault is generated from
the surrounding
environment.
Stop method: All axes stop
Checkpoint
Unplug all cables except Reproduced.
the control circuit power
supply cable, and check
Not reproduced.
the reproducibility of the
error.
Check the power supply Problem found.
for noise.
Check that the connector
is not shorted.
Examine checkpoints described in the alarm display "12.1".
Stop method: All axes stop
Checkpoint
Unplug all cables except Reproduced.
the power supply cable,
and check the
Not reproduced.
reproducibility of the error.
Error occurs when Error occurs.
connected with the
Error does not occur.
controller.
Check the power supply Problem found.
for noise.
Check that the connector
is not shorted.
Check for the fault of the
rear axis amplifier.
8 - 7
Finding Action
Replace the servo
amplifier.
Check (2).
Take countermeasure
according to the
cause.
Finding Action
Replace the servo
amplifier.
Check (3).
Replace the controller.
Check (4).
Take countermeasure
according to the
cause.