5.12 Holding Brake
5.12.3 Output Timing of /BK (Brake Output) Signal When the Servomotor Is Stopped
5-34
•
Axis B
5.12.3
Output Timing of /BK (Brake Output) Signal When the
Servomotor Is Stopped
When the Servomotor is stopped, the /BK signal turns OFF as soon the servo is turned OFF.
Use the servo OFF delay time (Pn506) to change the timing to turn OFF power supply to the
motor after the servo is turned OFF.
5.12.4
Output Timing of /BK (Brake Output) Signal When the
Servomotor Is Operating
If an alarm occurs while the Servomotor is operating, the Servomotor will start stopping and the
/BK signal will be turned OFF. You can adjust the timing of /BK signal output by setting the
brake reference output speed level (Rotary Servomotors: Pn507, Linear Servomotors: Pn583)
and the servo OFF-brake command waiting time (Pn508).
Note: If zero-speed stopping is set as the stopping method, the setting of Pn506 (Brake Reference-Servo OFF
Delay Time) is used after the motor stops.
Parameter
Connector Pin No.
Meaning
When
Enabled
Classifica-
tion
+ Pin
− Pin
Pn50F
n.
0
−
−
The /BK signal is not used.
After restart
Setup
n.
1
(default set-
ting)
CN1-25
CN1-26
The /BK signal is output from
CN1-25 and CN1-26.
n.
2
CN1-29
CN1-30
The /BK signal is output from
CN1-29 and CN1-30.
If you allocate more than one signal to the same output connector pin, a logical OR of the signals
is output. Allocate the /BK signal to its own output connector pin, i.e., do not use the same out-
put connector pin for another signal.
For example, never allocate the /TGON (Rotation Detection) signal and /BK signal to the same
output connector pin. If you did so, the /TGON signal would be turned ON by the falling speed on
a vertical axis, and the brake would not operate.
Important
Pn506
Brake Reference-Servo OFF Delay Time
Setting Range
Setting Unit
Default Setting
When Enabled
Classification
0 to 50
10 ms
0
Immediately
Setup
•
When the Servomotor is used to control a verti-
cal axis, the machine moving part may move
slightly due to gravity or an external force. You
can eliminate this slight motion by setting the
servo OFF delay time (Pn506) so that power
supply to the motor is stopped after the brake
is applied.
•
This parameter sets the timing of stopping
power supply to the Servomotor while the Ser-
vomotor is stopped.
Power supply to the Servomotor will be stopped immediately when an alarm occurs, regardless
of the setting of this parameter. The machine moving part may move due to gravity or an external
force before the brake is applied.
S
peed
Po
s
ition
Torque
S
ervo OFF
/BK
s
ignal
Motor power
s
tatu
s
ON
(Brake relea
s
ed.)
S
ervo ON
OFF (Brake applied.)
S
ervo OFF
Pn506
Power
s
upplied
to motor.
Power not
s
upplied to
motor.
Important
