Omron ACCURAX G5 User Manual page 322

6-6 Brake Interlock
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 operations cannot be performed. Provide a wait time of at least 10
minutes for the motor to cool down.
Operation command (RUN)
Dynamic brake relay
Motor power supply
Brake release request
from servo control *3
6
Motor rotation speed
*1. The servo will 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 allocated
to a CN1 general-purpose output to be used.
In the above example, no release request is received from the network.
*4. t1 is the set value of Brake Timing during Operation (Pn438), or the time needed for the motor rotation speed to
drop to 30 r/min or below, whichever occurs first.
Note:Even when the servo ON input is turned ON again while the motor is decelerating, the system will not enter the
servo ON state until the motor stops.
6-22
ON
Servo OFF *1 Servo ON
OFF
Approx. 2 ms
ON
DB engaged
OFF
ON
No power supply
OFF
ON
Brake held
OFF
Approx. +30 r/min
Servo ON enabled
Approx. −30 r/min
Accurax G5 AC SERVOMOTOR AND SERVO DRIVE USER'S MANUAL
DB Released
Approx. 60 ms
Power supply
Approx. 4 ms
Release request
Rotation speed A
Approx. 30 r/min
BKIR
Release request
Rotation speed B
Approx. 30 r/min
Servo OFF
1 to 5 ms
*2
DB Released
No power supply
*4
t1
Pn438
Brake held