Mitsubishi Electric MELSERVO-J4 Instruction Manual page 47

1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
Alarm No.: 2A Name: Linear encoder error 1
Alarm content
Detail
Detail name
No.
2A.1 Linear encoder (1) Mounting condition of
error 1-1
(2) The external conductor
(3) Something near the
(4) An alarm of the linear
2A.2 Linear encoder Check it with the check method for [AL. 2A.1].
error 1-2
2A.3 Linear encoder
error 1-3
2A.4 Linear encoder
error 1-4
2A.5 Linear encoder
error 1-5
2A.6 Linear encoder
error 1-6
2A.7 Linear encoder
error 1-7
2A.8 Linear encoder
error 1-8
Alarm No.: 2B Name: Encoder counter error
Alarm content
Detail
Detail name
No.
2B.1 Encoder (1) An encoder cable is
counter error 1
(2) The external conductor
(3) Something near the
(4) An encoder is
2B.2 Encoder Check it with the check method for [AL. 2B.1].
counter error 2
An error of the linear encoder was detected. (The details vary depending on the linear encoder
manufacturer.)
Cause
Adjust the positions of
the linear encoder and the scale and head,
head is failure. and then check the
repeatability.
Check if it is
of the encoder cable is connected.
not connected to the
ground plate of the
connector.
Check the noise,
device caused it. ambient temperature,
vibration, etc.
Check the content of
encoder was detected. the alarm detail list of
the Linear Encoder
Instruction Manual.
Data which encoder created is failure.
Cause
Check if the encoder
malfunctioning. cable is disconnected
or shorted.
Check if it is
of the encoder cable is connected.
not connected to the
ground plate of the
connector.
Check the noise,
device caused it. ambient temperature,
vibration, etc.
Replace the direct
malfunctioning. drive motor, and then
check the
repeatability.
Check method Check result
It is not repeatable.
It is repeatable.
It is not connected.
It is connected.
It has a failure.
It has no failure.
Remove its cause
described in the
instruction manual.
Check method Check result
It has a failure.
It has no failure.
It is not connected.
It is connected.
It has a failure.
It has no failure.
It is not repeatable.
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Action Target
Use the equipment [A]
at the adjusted [B]
position. [WB]
[GF]
Check (2).
Connect it correctly.
Check (3).
Take
countermeasures
against its cause.
Check (4).
Contact each
encoder
manufacturer for
how to deal with it.
Action Target
Repair or replace [A]
the cable. [B]
[WB]
Check (2).
[GF]
Connect it correctly.
Check (3).
Take
countermeasures
against its cause.
Check (4).
Replace the direct
drive motor.