Mitsubishi Electric MELSERVO-J4 Instruction Manual page 81

1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
Alarm No.: 72 Name: Load-side encoder normal communication error 2
Alarm content
Detail
Detail name
No.
72.2 Load-side (1) A load-side encoder is
encoder data
update error
(2) Something near the
72.3 Load-side Check it with the check method for [AL. 72.2].
encoder data
waveform error
72.4 Load-side (1) A signal of the load-
encoder non-
signal error
(2) Something near the
72.5 Load-side Check it with the check method for [AL. 72.2].
encoder
hardware error 1
72.6 Load-side
encoder
hardware error 2
72.9 Load-side Check it with the check method for [AL. 72.1].
encoder data
error 2
Alarm No.: 74 Name: Option card error 1
Alarm content
Detail
Detail name
No.
74.1 Option card (1) The MR-J3-T10 came
error 1
(2) MR-J3-T10 is
(3) The servo amplifier is
74.2 Option card Check it with the check method for [AL. 74.1].
error 2
74.3 Option card
error 3
74.4 Option card
error 4
74.5 Option card
error 5
The load-side encoder detected an error signal.
Cause
Replace the load-side
malfunctioning. encoder, and then
check the
repeatability.
Check the noise,
device caused it. ambient temperature,
etc.
Check if the load-side
side encoder has not encoder cable is
been inputted. wired correctly.
Check the noise,
device caused it. ambient temperature,
etc.
MR-J3-T10 came off.
MR-J3-T10 is not properly recognized.
Cause
Check if the MR-J3-
off during the CC-Link T10 is mounted
IE communication. correctly.
Replace the MR-J3-
malfunctioning. T10, and then check
the repeatability.
Replace the servo
malfunctioning. amplifier, and then
check the
repeatability.
Check method Check result
It is not repeatable.
It is repeatable.
It has a failure.
It has a failure.
It has no failure.
It has a failure.
Check method Check result
It is not mounted
correctly.
It is mounted
correctly.
It is not repeatable.
It is repeatable.
It is not repeatable.
1 - 74
Action Target
Replace the load- [A]
side encoder. [B]
[WB]
Check (2).
[GF]
Take
countermeasures
against its cause.
Review the wiring. [A]
[B]
Check (2).
[WB]
[GF]
Take
countermeasures
against its cause.
Action Target
Install it correctly. [RJ010]
Check (2).
Replace the MR-J3-
T10.
Check (3).
Replace the servo
amplifier.