YASKAWA UAK series User Manual page 173

8 Operation
8.4.3 Holding Brakes
(4) Brake (/BK) Signal Output Timing during Servomotor Rotating
If an alarm occurs while the servomotor is rotating, the servomotor will come to a stop and the brake signals
will be turned OFF. The timing of brake signal output can be adjusted by setting the brake reference output
speed level (Pn507) and the waiting time for brake signal when motor running (Pn508).
Note: If the servomotor is set so that it comes to a zero-speed stop for an alarm, follow the information in (3) Brake ON
Timing after the Servomotor Stops after the servomotor comes to a stop for a zero position reference.
Pn507
(2112h:2)
Pn508
(2112h:4)
/BK Signal Output Conditions When
Servomotor Rotating
The /BK signal goes to high level (brake
ON) when either of the following condi-
tions is satisfied:
• When the motor speed falls below the
level set in Pn507 after the power to the
servomotor is turned OFF.
• When the time set in Pn508 is exceeded
after the power to the servomotor is
turned OFF.
8-16
Brake Reference Output Speed Level
Setting Range Setting Unit
0 to 10000
1 min
Waiting Time for Brake Signal When Motor
Running
Setting Range Setting Unit
10 to 100
The servomotor will be limited to its maximum speed even if the value set in Pn507 is
higher than the maximum speed.
Speed
Factory Setting
-1
100
Speed
Factory Setting
10 ms 50
Disable operation
command
Servo ON
or alarm or
power OFF
Motor speed
Power to motor
ON
Brake
/BK output
released
(ON)
Position Torque
Classification
When Enabled
Immediately Setup
Torque
Position
Classification
When Enabled
Immediately Setup
Servo OFF
Pn-507
Motor stopped by applying
DB or by coasting Pn001.0
OFF
Brake applied
(OFF)
Pn508