Mitsubishi Electric MELSERVO MR-MT2010 Instruction Manual page 218

10. TROUBLESHOOTING
Alarm No.: 75 Name: Extension module error
Alarm content
Detail
Detail name
No.
75.1 Reset signal (1) A module is
error
(2) A connection error is
(3) Problem with the
75.3 Output pulse (1) A module is
error 1
75.4 Output pulse (1) A module is
error 2
An extension module is malfunctioning.
Cause
Replace the
malfunctioning. corresponding module,
and then check the
repeatability.
Remove and connect
found in the module. the corresponding
module, and then
check the
repeatability.
Check the noise,
surrounding. ambient temperature,
etc.
Replace the
malfunctioning. corresponding module,
and then check the
repeatability.
Replace the
malfunctioning. corresponding module,
and then check the
repeatability.
Check method Check result
It is not repeatable.
It is repeatable.
It is repeatable.
It is not repeatable.
It has a failure.
It is not repeatable.
It is not repeatable.
10 - 25
Action Target
Replace the module. [MT2100]
[MT2200]
Check (2). [MT2300]
[MT2400]
Replace the module
previous and next to
the corresponding
module.
Check (3).
Take
countermeasures
against its cause.
Replace the pulse [MT2200]
I/O module.
Replace the pulse
I/O module.