Mitsubishi Electric MELSERVO MR-MT2010 Instruction Manual page 209

10. TROUBLESHOOTING
Alarm No.: 28 Name: Encoder I/F module - Linear encoder error 2
Alarm content
Detail
Detail name
No.
28.1 Encoder I/F (1) The ambient
module - Ch. A
Linear encoder
environmental
error
(2) The signal level of the
28.2 Encoder I/F (1) The ambient
module - Ch. B
Linear encoder
environmental
error
(2) The signal level of the
Alarm No.: 2A Name: Encoder I/F module - Ch. A Linear encoder error 1
Alarm content
Detail
Detail name
No.
2A.1 Encoder I/F (1) Installation error exists
module - Ch. A
Linear encoder
error 1-1
(2) The external conductor
(3) Problem with the
(4) An alarm was detected
2A.2 Encoder I/F Check it with the check method for [AL. 2A.1].
module - Ch. A
Linear encoder
error 1-2
2A.3 Encoder I/F
module - Ch. A
Linear encoder
error 1-3
2A.4 Encoder I/F
module - Ch. A
Linear encoder
error 1-4
2A.5 Encoder I/F
module - Ch. A
Linear encoder
error 1-5
The working environment of the encoder connected to the encoder I/F module is not normal.
Cause
Check the ambient
temperature of the linear temperature of the
encoder connected to linear encoder
ch. A is out of connected to ch. A.
specifications.
Check the installation
linear encoder condition of the linear
connected to ch. A has encoder connected to
dropped. ch. A.
Check the ambient
temperature of the linear temperature of the
encoder connected to linear encoder
ch. B is out of connected to ch. B.
specifications.
Check the installation
linear encoder condition of the linear
connected to ch. B has encoder connected to
dropped. ch. B.
An error was detected in the linear encoder connected to ch. A of the encoder I/F module. (The details
vary depending on the linear encoder manufacturer.)
Cause
Adjust the positions of
in the head of the linear the scale and head,
encoder connected to and then check the
ch. A. repeatability.
Check if it is
of the encoder cable is connected.
not connected to an
SHD pin of the
connector.
Check the noise,
surrounding. ambient temperature,
vibration, etc.
Refer to the alarm
in the linear encoder detail list of the "Linear
connected to ch. A. Encoder Instruction
Manual".
Check method Check result
It is out of
specifications.
It is within
specifications.
It has a failure.
It is out of
specifications.
It is within
specifications.
It has a failure.
Check method Check result
It is not repeatable.
It is repeatable.
Not connected
Connected
It has a failure.
It has no failure.
Remove its cause
described in the
instruction manual.
10 - 16
Action Target
Lower the [MT2400]
temperature. Contact
the linear encoder
manufacturer.
Check (2).
Install it correctly.
Lower the
temperature. Contact
the linear encoder
manufacturer.
Check (2).
Install it correctly.
Action Target
Use the linear [MT2400]
encoder at the
adjusted position.
Check (2).
Connect it correctly.
Check (3).
Take
countermeasures
against its cause.
Check (4).
Contact each
encoder
manufacturer for how
to deal with it.