Mitsubishi Electric MELSERVO-J5 MR-J5 Series User Manual page 345

■Alarm occurrence
The STO function is activated also when an alarm occurs. While STO is activated, the energy supply to the servo motor is
shut off and the dynamic brake is activated. For the alarms that activate STO, refer to "List of alarm No./warning No." in the
User's Manual (Troubleshooting). For how to return to normal operation, refer to the following.
Page 375 At alarm occurrence
This timing chart is for the STO/DB stop method.
0 r/min
Servo motor speed
(mm/s)
ON (disabled)
ALM (malfunction)
OFF (enabled)
Base circuit ON
(energy supply to
OFF
servo motor)
ON
STOS (STO output)
OFF (shut-off)
■STO shut-off during servo motor operation
• Turning off STOC (STO command) during operation will shut off energy without generating an alarm.
• Note that activating the STO function during servo motor operation will shorten the service life of the
dynamic brake relay.
After servo-off, turn off STOC (STO command) while the servo motor is stopped. To decelerate at the same time, use the SS1
function.
0 r/min
Servo motor speed
(mm/s)
ON (disabled)
STO command
OFF (enabled)
ON (enabled)
WNG (warning)
OFF (disabled)
Base circuit ON
(energy supply to
OFF
servo motor)
ON
STOS (STO output)
OFF (shut-off)
Normal operation
Normal operation STO state
STO state
Normal operation
6 FUNCTIONAL SAFETY
6.4 Safety sub-function
6
343