SMC Networks LECSB2-T Series User Manual

8. TROUBLESHOOTING
8 - 43
Alarm No.: 56
Name: Forced stop error
Alarm content
・
The servo motor does not decelerate normally during forced stop deceleration.
Detail
No.
Detail name
Cause
Check method
Check result
Action
56.2
Over speed
during forced
stop
(1)
The forced stop
deceleration time
constant is short.
[Pr. PC51]
Increase the parameter
setting value, and then
check the
repeatability.
It is not repeatable.
Adjust the deceleration
time constant.
It is repeatable.
Check (2).
(2)
The torque limit has
been enabled.
Check if the limiting
torque is in progress.
The limiting torque is
in
progress.
Review the torque limit
value.
The limiting torque is
not
in progress.
Check (3).
(3)
The servo system is
unstable and
oscillating.
Check if the servo
motor
is oscillating. Check the
torque ripple with
setup software (MR
Configurator2
TM
).
The torque ripple is
vibrating.
Adjust the servo gain.
Set the machine
resonance suppression
filter.
The torque ripple is
not vibrating.
Check (4).
(4)
The encoder is
malfunctioning.
Replace the servo
motor, and
then check the
repeatability.
It is not repeatable.
Replace the servo motor.
56.3
Estimated
distance over
during forced
stop
(1)
The forced stop
deceleration time
constant is short.
[Pr. PC51]
Increase the parameter
setting value, and then
check the
repeatability.
It is not repeatable.
Adjust the deceleration
time constant.
It is repeatable.
Check (2).
(2)
The torque limit has
been enabled.
Check if the limiting
torque is in progress.
The limiting torque is
in progress.
Review the torque limit
value.
The limiting torque is
not in progress.
Check (3).
(3)
The encoder or linear
encoder is
malfunctioning.
Replace the servo
motor, and
then check the
repeatability.
It is not repeatable.
Replace the servo motor.
Alarm No.: 61
Name: Operation error
Alarm content
・
An operation of the positioning function failed.
Detail
No.
Detail name
Cause
Check method
Check result
Action
61.1
Point table
setting range
error
(1)
"1" or "3" was set to the
sub function of the last
point table (255).
Check if "1" or "3" was
set.
It was set.
Review the settings.
Alarm No.: 63
Name: STO timing error
Alarm content
・
STO input signal turns off while the servo motor is rotating.
Detail
No.
Detail name
Cause
Check method
Check result
Action
63.1
STO1 off
(1)
STO1 was turned off
(enabled) under the
following speed
conditions.
1) Servo motor speed:
50 r/min or more
Check if STO1 is off
(enabled).
It is off (enabled).
Turn on STO1 (disabled).
63.2
STO2 off
(1)
STO2 was turned off
(enabled) under the
following speed
conditions.
Check if STO2 is off
(enabled).
It is off (enabled).
Turn on STO2 (disabled).

SMC Networks LECSB2-T Series Specifications

General

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