8 Operation
8.4.3 Holding Brakes
8-16
(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.
/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.
Pn507
(2112h:2)
Brake Reference Output Speed Level
Classification
Setting Range
Setting Unit
Factory Setting
When Enabled
0 to 10000
1 min
-1
100
Immediately
Setup
Pn508
(2112h:4)
Waiting Time for Brake Signal When Motor
Running
Classification
Setting Range
Setting Unit
Factory Setting
When Enabled
10 to 100
10 ms
50
Immediately
Setup
The servomotor will be limited to its maximum speed even if the value set in Pn507 is
higher than the maximum speed.
Speed
Position
Torque
Speed
Position
Torque
Disable operation
command
or alarm or
power OFF
Motor speed
Pn-507
Servo ON
Servo OFF
Pn508
Power to motor
ON
OFF
/BK output
Brake
released
(ON)
Brake applied
(OFF)
Motor stopped by applying
DB or by coasting
Pn001.0