SMC Networks LECSB2-T Series User Manual

8. TROUBLESHOOTING
8 - 59
95.2
STO2 off
detection
(1)
STO2 is not inputted
correctly.
Check if the STO2 of
CN8 connector is wired
correctly.
It is not wired
correctly.
Wire it correctly. (When not
using the STO function,
attach the shortcircuit
connector came with the
driver to CN8.)
It is wired correctly.
Check (2).
(2)
STO2 was turned off
(enabled) under the
following speed
conditions.
1) Servo motor speed:
50 r/min or less
Check if STO2 is off
(enabled).
It is off (enabled).
Turn on STO2(disabled).
95.3
STO warning 1
(safety
observation
function)
(1)
"Input device -
Fixingdiagnosis
Execution selection at
start-up" was not
executed.
Check if "Input device -
Fixing-diagnosis
execution selection at
start-up" was
executed
It was not executed.
Execute it.
It was executed.
Check (2).
(2)
Set "Input device -
Fixing-diagnosis
execution selection at
start-up" correctly using
parameters.
Check if [Pr. PSD27]
and [Pr. PSD28] are
set correctly.
It is not set
correctly.
Review the parameter
It is set correctly.
Check (3).
(3)
The wiring is
incorrect.
Check if the wiring has
a failure.
It has a failure.
Review the wiring.
It has no failure.
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.
There is a problem in
the surrounding.
Take countermeasures
against its cause.
95.4
STO warning 2
(safety
observation
function)
(1)
The test operation
mode was not set
correctly.
Check if the driver and
functional
safety unit are set to
the test operation
mode.
It is not set.
Set it correctly.
It is set.
Check (2).
(2)
An error occurred in the
safety communication.
Or the network is
disconnected.
Check the description
"The display shows
"Ab"." .
⇒Page 124 Trouble
which does not trigger
alarm/warning
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 driver is
malfunctioning.
Replace the driver, and
then check
the repeatability.
It is not repeatable.
Replace the driver.
It is repeatable.
Check (7).
(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 (8).
(6)
Something near the
device caused it.
Check the noise,
ambient
temperature, etc.
There is a problem in
the surrounding.
Take countermeasures
against its cause.
95.5
STO warning 3
(safety
observation
function)
(1)
STO command/SS1
command of the
functional safety unit
was turned off
(enabled) under the
following speed
conditions.
1) Servo motor speed:
50 r/min or less
Check if STO
command/
SS1 command of the
functional safety unit is
off (enabled).
It is off (enabled).
Turn on (disabled) STO
command/SS1 command
of the functional safety
unit.

SMC Networks LECSB2-T Series Specifications

General

Brand	SMC Networks
Model	LECSB2-T Series
Category	DC Drives
Language	English