Mitsubishi Electric MELSERVO-J4 Instruction Manual page 82

1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
Alarm No.: 75 Name: Option card error 2
Alarm content
Detail
Detail name
No.
75.3 Option card (1) MR-J3-T10 came off.
connection error
(2) MR-J3-T10 is
(3) The servo amplifier is
75.4 Option card (1) MR-J3-T10 was not
disconnected
(2) MR-J3-T10 is
(3) The servo amplifier is
Alarm No.: 79 Name: Functional safety unit diagnosis error
Alarm content
Detail
Detail name
No.
79.1 Functional (1) The power supply of
safety unit
power voltage
error
(2) The functional safety
(3) The servo amplifier is
(4) Something near the
79.2 Functional (1) The functional safety
safety unit
internal error
(2) Something near the
MR-J3-T10 came off.
Cause
Check if the MR-J3-
T10 is mounted
correctly.
Replace the MR-J3-
malfunctioning. T10, and then check
the repeatability.
Replace the servo
malfunctioning. amplifier, and then
check the
repeatability.
Check if the MR-J3-
connected correctly. T10 is mounted
correctly.
Replace the MR-J3-
malfunctioning. T10, and then check
the repeatability.
Replace the servo
malfunctioning. amplifier, and then
check the
repeatability.
A diagnosis of the functional safety unit failed.
Cause
Check the installation
the functional safety of the functional safety
unit is failure. unit.
Replace the functional
unit is malfunctioning. safety unit, and then
check the
repeatability.
Replace the servo
malfunctioning. amplifier, and then
check the
repeatability.
Check the power
device caused it. supply for noise.
Replace the functional
unit is malfunctioning. safety unit, and then
check the
repeatability.
Check the power
device caused it. supply for noise.
Check method Check result
It is not mounted
correctly.
It is mounted
correctly.
It is not repeatable.
It is repeatable.
It is not repeatable.
It is not mounted
correctly.
It is mounted
correctly.
It is not repeatable.
It is repeatable.
It is not repeatable.
Check method Check result
It has a failure.
It has no failure.
It is not repeatable.
It is repeatable.
It is not repeatable.
It is repeatable.
It has a failure.
It is not repeatable.
It is repeatable.
It has a failure.
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Action Target
Install it correctly. [RJ010]
Check (2).
Replace the MR-J3-
T10.
Check (3).
Replace the servo
amplifier.
Install it correctly.
Check (2).
Replace the MR-J3-
T10.
Check (3).
Replace the servo
amplifier.
Action Target
Install it correctly. [A]
[B]
[GF]
Check (2).
Replace the
functional safety unit.
Check (3).
Replace the servo
amplifier.
Check (4).
Take
countermeasures
against its cause.
Replace the
functional safety unit.
Check (2).
Take
countermeasures
against its cause.