Omron ACCURAX G5 - Page 322

6-22
6-6 Brake Interlock
Accurax G5 AC SERVOMOTOR AND SERVO DRIVE USER'S MANUAL
6
Applied Functions
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.
*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.
Operation command (RUN)
ON
OFF
Dynamic brake relay
ON
OFF
Motor power supply
ON
OFF
Brake release request
from servo control *3
ON
OFF
Approx. 2 ms 1 to 5 ms
Approx. 4 ms
Pn438
Approx. 60 ms
Servo OFF Servo OFF*1 Servo ON
DB engaged DB Released
*2
DB Released
Power supply
No power supply No power supply
Release request
Release request
Brake held
Brake held
t1
*4
Motor rotation speed
Servo ON enabled
Approx. +30 r/min
Approx. 30 r/min
Approx. 30 r/min
Approx. −30 r/min
Rotation speed A
Rotation speed B
BKIR