Mitsubishi Electric MR-J4 TM Series, Инструкция по эксплуатации

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8. TROUBLESHOOTING
8 - 11
Alarm No.: 95 Name: STO warning
Alarm content
STO input signal turns off while the servo motor stops.
A diagnosis of input devices was not executed.
The safety observation function was enabled in the test mode.
Detail
No.
Detail name Cause Check method Check result Action Target
95.4 STO warning 2
(safety
observation
function)
(1) The test operation
mode was not set
correctly.
Check if the servo
amplifier and
functional safety unit
are set to the test
operation mode. It is not set. Set it correctly. [TM]
It is set. Check (2).
(2) An error occurred in
safety communication.
Check the description
"Initialization
communication with
the controller has not
completed." of the
section 8.5. It is not repeatable. Take
countermeasures
against its cause.
It is repeatable. Check (3).
(3) "Input mode selection"
in [Pr. PSA02
Functional safety unit
setting] is not set
correctly.
Set [Pr. PSA02]
correctly and check
the repeatability. It is not repeatable. Review the
parameter.
It is repeatable. Check (4).
(4) The servo amplifier is
malfunctioning.
Replace the servo
amplifier, and then
check the
repeatability. It is not repeatable. Replace the servo
amplifier.
It is repeatable. Check (5).
(5) The functional safety
unit is malfunctioning.
Replace the functional
safety unit, and then
check the
repeatability. It is not repeatable. Replace the
functional safety unit.
It is repeatable. Check (6).
(6) Something near the
device caused it.
Check the noise,
ambient temperature,
etc. It has a failure. Take
countermeasures
against its cause.