Mitsubishi Electric MELSERVO-J3W Series Instruction Manual page 147

8. TROUBLESHOOTING
Alarm No.15
Alarm description
Display Name
15.1 EEP-ROM error
at power on
15.2 EEP-ROM error
during operation
Alarm No.16
Alarm description
Display Name
16.1 Encoder receive
data error 1
16.2 Encoder receive
data error 2
Name: Memory error 2 (EEP-ROM)
Interior part of the servo amplifier (EEP-ROM) is faulty.
Cause
(1) EEP-ROM operates
abnormally at power on
(2) Fault is generated from
the surrounding
environment.
(3) The number of parameter
write times is more than
100,000 times.
(1) EEP-ROM operates
abnormally during normal
operation.
Name: Encoder initial communication error 1
Error occurs in the communication between the encoder and the servo amplifier.
Cause
(1) Encoder cable is faulty.
(2) Fault is generated from
the surrounding
environment.
(3) Servo amplifier is faulty.
(1) Encoder cable is faulty.
(2) Fault is generated from
the surrounding
environment.
(3) Replace the servo
amplifier.
Stop method: All axes stop
Checkpoint
Unplug all cables except Reproduced.
the power supply cable,
and check the
Not reproduced.
reproducibility of the error.
Check that the power Problem found.
supply does not have
noise.
Check that the connector
No problem found.
is not shorted.
Check if parameter Changed.
settings are changed
frequently.
Check if the error occurs Error occurs.
when parameter is
changed during normal
operation.
Stop method: Corresponding axis stops
Checkpoint
Check the shield. Problem found.
No problem found.
Check for noise, Problem found.
surrounding air
temperature, and other
factors.
No problem found.
Check the reproducibility Reproduced.
of the error.
Not reproduced.
Examine checkpoints described in the alarm display "16.1".
8 - 8
Finding Action
Replace the servo
amplifier.
Check (2).
Take countermeasure
according to the
cause.
Check (3).
Change parameters
less frequently.
Replace the servo
amplifier.
Finding Action
Repair the cable.
Check (2).
Take countermeasure
according to the
cause.
Check (3).
Replace the servo
amplifier.
Examine checkpoints
described in the alarm
display "16.3".