YASKAWA E-7S SERVOPACK SGD7S - Output Timing of;BK (Brake) Signal When the Servomotor Is Stopped; Output Timing of;BK (Brake) Signal When the Servomotor Is Operating

5.11 Holding Brake
5.11.3 Output Timing of /BK (Brake) Signal When the Servomotor Is Stopped
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Basic Functions That Require Setting before Operation
5.11.3 Output Timing of /BK (Brake) Signal When the
Servomotor Is Stopped
When the Servomotor is stopped, the /BK signal turns OFF at the same time as the /S-ON sig-
nal turns OFF. Use the servo OFF delay time (Pn506) to change the timing to turn OFF power
supply to the motor after the /S-ON signal turns OFF.
5.11.4 Output Timing of /BK (Brake) 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 reference waiting time (Pn508).
Note: If zero-speed stopping is set as the stopping method for alarms, the setting of Pn506 (Brake Reference-
Servo OFF Delay Time) is used after the motor stops.
• Rotary Servomotors
Inverting the polarity of the brake output signal (/BK), i.e. positive logic, will prevent the holding
brake from working in case of its signal line disconnection.
If this setting is absolutely necessary, check the operation and confirm that there are no safety
problems.
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.
Pn506
/BK signal
ON
OFF
OFF (Brake applied.)
Power
supplied.
Power not
supplied.
ON (Brake
released.)
Motor power status
/S-ON input
(CN1-13)
Important
Pn507
Brake Reference Output Speed Level
Setting Range Setting Unit Default Setting When Enabled Classification
0 to 10,000
1 min
-1
100 Immediately Setup
Pn508
Servo OFF-Brake Reference Waiting Time
Setting Range Setting Unit Default Setting When Enabled Classification
10 to 100 10 ms 50 Immediately Setup