1. TROUBLESHOOTING FOR SERVO AMPLIFIER (DRIVE UNIT)
1 - 77
Alarm No.: 79
Name: Functional safety unit diagnosis error
Alarm content
A diagnosis of the functional safety unit failed.
Detail
No.
Detail name
Cause
Check method
Check result
Action
Target
79.6 Output
device
error
(1) A signal of an output
device has not been
outputted correctly.
Check if the output
device cable is wired
correctly. Or check if
the load of the output
device is within the
specifications.
It has a failure.
Review the wiring or
load.
[A]
[B]
[GF]
It has no failure.
Check (2).
(2) The test pulse time was
not set correctly.
Check the setting of
[Pr. PSD30 Output
device - Test pulse off
time].
The test pulse width
is longer than the
set value.
Set the value longer.
The test pulse width
is shorter than the
set value.
Check (3).
(3) Current of the output
device is excessive.
Check if the current is
used within
prescribed.
Not within
prescribed.
Reduce the output
current.
Within prescribed.
Check (4).
(4) 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 (5).
(5) Something near the
device caused it.
Check the noise,
ambient temperature,
etc.
It has a failure.
Take
countermeasures
against its cause.
79.7 Mismatched
input signal
error
(1) A mismatch of input
signal DI_A and DI_B
continued for a fixed
time ([Pr. PSD18] to [Pr.
PSD23]).
Check if the input
device cable is wired
correctly.
It has a failure.
Review the wiring.
It has no failure.
Check (2).
(2) An input mismatch time
was not set correctly.
Check the settings of
[Pr. PSD18 Mismatch
permissible time DI1]
to [Pr. PSD23
Mismatch permissible
time DI6].
The mismatched
time is longer than
the set value.
Set the value
longer.
The
mismatched
time is shorter than
the set value.
Check (3).
(3) 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 (4).
(4) Something near the
device caused it.
Check the noise,
ambient temperature,
etc.
It has a failure.
Take
countermeasures
against its cause.
Содержание MELSERVO MR-J4-B-RJ Series
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