SMC Networks LECSB2-T Series - Page 331

8. TROUBLESHOOTING
8 - 44
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
63.2
STO2 off
(1)
Servo motor speed:
50 r/min or more
63.5
STO by
functional
safety unit
STO of the functional
safety unit was turned
off (enabled) under the
following speed
conditions.
1) Servo motor speed:
50 r/min or more
Check if STO of the
functional safety unit is
off (enabled).
It is off (enabled).
Turn on STO
(disabled).
Alarm No.: 64
Name: Functional safety unit setting error
Alarm content
・
A setting of the driver or functional safety unit was incorrect.
Detail
No.
Detail name
Cause
Check method
Check result
Action
64.1
STO input error
(1)
When a functional
safety unit is used, a
connector is connected
to CN8 of the driver.
Check the connection
of the CN8 connector.
It is connected.
Turn off the control circuit
power supply of the driver,
and then remove the
connector of CN8.