SMC Networks LECSN-T Series

8. TROUBLESHOOTING
8 - 43
Alarm No.: 65
Name: Functional safety unit connection error
Alarm content
・
Communication or signal between a functional safety unit and driver failed.
Detail
No.
Detail name
Cause
Check method
Check result
Action
65.1
Functional
safety unit
communication
error 1
(1)
The functional safety
unit came off.
Check the installation
of the functional
safety unit.
It is disconnected.
Turn off the control circuit
power supply of the
driver, and then
connect the functional
safety unit.
It is connected.
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.
65.2
Functional
safety unit
communication
error 2
Check it with the check method for [AL. 65.1].
65.3
Functional
safety unit
communication
error 3
65.4
Functional
safety unit
communication
error 4
65.5
Functional
safety unit
communication
error 5
65.6
Functional
safety unit
communication
error 6
65.7
Functional
safety unit
communication
error 7
65.8
Functional
safety unit
shutoff
signal error 1
65.9
Functional
safety unit
shutoff
signal error 2