YASKAWA SVC - Page 402

6.1 Controlling Vertical Axes
6.1.2 Connecting to a Σ-V or Σ-7 Servo Drive
6-5
6
Other Useful Functions
Details
This parameter adjusts the delay time from when the /BK signal is output until the Servomotor
turns OFF.
Set this parameter when the machine moves slightly due to gravity or other forces after the
brake is turned ON.
Setting Precautions
• This parameter is used to set when the motor stops. Set Pn507 and Pn508 to operate the
brake while the motor is running.
• Under the standard settings, the Servomotor turns OFF simultaneously with the /BK output
(brake operation). If gravity causes the machine to move slightly at this time due to the
machine configuration or the brake characteristics, you can delay when the Servomotor is
turned OFF to reduce the movement.
Details
These parameters are used to set the timing for applying the brake when the Servomotor turns
OFF due to an /S-ON input signal or when an alarm occurs.
• Conditions for Brake Operation during Servomotor Operation
The brake will operate when one of the following conditions is met.
• When the motor speed is equal to or less than the setting of Pn507 after power to the motor is
turned OFF
• When the time set in Pn508 has elapsed after power to the motor is turned OFF
Setting Precautions
The brake on the Servomotor is designed as a holding brake and it must be applied only after
the motor has stopped. Adjust this parameter while observing the operation of the machine.
Parameter Name Unit
Set Value/Setting
Range
Default
Valid Control
Modes
Pn506
Brake Reference -
Servo OFF Delay Time
10 ms 0 to 50 0
Speed, torque, or
position control
Parameter Name Unit
Set Value/Setting
Range
Default
Valid Control
Modes
Pn507
Brake Reference Out-
put Speed Level
min
-1
0 to 10,000 100
Speed, torque, or
position control
Pn508
Servo OFF - Brake
Reference Waiting
Time
10 ms 0 to 100 50
Speed, torque, or
position control
Pn506
/S-ON input
/BK output
Servo ON/OFF
Servo ON
Brake
released.
Motor ON
Servo OFF
Brake held.
Motor OFF
Servo OFF delay
Pn507
Pn508
Power OFF on
/S-ON input
or alarm
Motor speed
/BK output
Brake
released.
Servo OFF
DB stop or
free-run stop
(Pn001.0)
Brake held.
Servo ON