SMC Networks LECSN-T Series User Manual

8. TROUBLESHOOTING
8 - 46
(5)
Something near the
device caused it.
Check the noise,
ambient temperature,
etc.
There is a problem in
the surrounding.
Take
countermeasures
against its cause
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
79.1
Functional
safety unit
power voltage
error
(1)
The power supply of the
functional safety unit is
failure.
Check the installation
of the functional safety
unit.
It has a failure.
Install it correctly.
It has no failure.
Check (2).
(2)
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 (3).
(3)
The driver is
malfunctioning.
Replace the driver, and
then check the
repeatability.
It is not repeatable.
Replace the driver.
It is repeatable.
Check (4).
(4)
Something near the
device caused it.
Check the power
supply for noise.
There is a problem in
the surrounding.
Take countermeasures
against its cause.
79.2
Functional
safety unit
internal error
(1)
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 (2).
(2)
Something near the
device caused it.
Check the power
supply for noise.
There is a problem in
the surrounding.
Take countermeasures
against its cause.
79.3
Abnormal
temperature of
functional safety
unit
(1)
Ambient temperature
has exceeded 55
℃
.
Check the ambient
temperature.
It is over 55
℃
Lower the ambient
temperature.
It is less than 55
℃
Check (2).
(2)
Ambient temperature is
less than 0
℃
.
Check the ambient
temperature.
It is less than 0
℃
Increase the ambient
temperature.
It is 0
℃
or more.
Check (3).
(3)
The close mounting is
out of specifications.
Check the
specifications
of close mounting.
It is out of
specifications.
Mount it correctly
It is within
specifications.
Check (4).
(4)
An opening is clogged
up.
Clean the opening
and check the
repeatability.
It is not repeatable.
Clean it periodically.
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 power
supply for noise.
There is a problem
in the surrounding.
Take countermeasures
against its cause.
79.4
Driver error
(1)
The functional safety
unit came off.
Check the installation
of the functional
safety unit.
It has a failure.
Install it correctly.
It has no failure.
Check (2).
(2)
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 (3).
(3)
The driver is
malfunctioning.
Replace the driver,
and then check
the repeatability.
It is not repeatable.
Replace the driver.
It is repeatable.
Check (4).
(4)
Something near the
device caused it.
Check the noise,
ambient
temperature, etc.
There is a problem
in the
surrounding.
Take countermeasures
against its cause.

SMC Networks LECSN-T Series Specifications

General

Brand	SMC Networks
Model	LECSN-T Series
Category	Controller
Language	English