Omron R88D-KTA5L User Manual page 393

Servo ON/OFF Operation Timings <When Motor Is Rotating>
Based on these operation timings, regenerative energy is produced if the motor rotation stops
abnormally.
Accordingly, repeated operation cannot be performed. Provide a wait time of at least 10
minutes for the motor to cool down.
ON
Operation command (RUN)
OFF
Released
Dynamic brake
Engaged
ON
Motor power supply
OFF
ON
Brake release request
from servo control *3
OFF
Motor rotation speed
*1. The servo does not turn ON until the motor rotation speed drops to approx. 30 r/min or below.
*2. The dynamic brake operation when the servo is OFF depends on Stop Selection with Servo OFF (Pn506).
*3. The brake interlock (BKIR) signal is output upon a release request from servo control. The BKIR signal is assigned
to the general-purpose output (CN1).
*4. "t1" is either the time set for the Brake Timing During Operation (Pn438), or the time needed for the motor speed to
drop to speed set in Brake Release Speed Setting (Pn439) or below, whichever comes first.
Note:Even when the servo ON input is turned ON again while the motor is decelerating, the system does not enter the
servo ON state until the motor stops.
OMNUC G5-SERIES AC SERVOMOTOR AND SERVO DRIVE USER'S MANUAL
Servo OFF *1 Servo ON
Approx. 2 ms
DB engaged
No power supply
Brake held
Approx. +30 r/min
Servo ON enabled
Approx. −30 r/min
DB Released
Approx. 60 ms
Power supply
Approx. 4 ms
Release request
When the Pn438 set value is early
Pn439 set value
BKIR
Release request
When the Pn439 set value is early
Pn439 set value
6-6 Brake Interlock
Servo OFF
1 to 5 ms
*2
DB Released
No power supply
*4
t1
Pn438
Brake held
6-21
6