YASKAWA SGDH, User Manual

Page: 456 / 616

8 Operation
8.3.4 Setting for Holding Brakes
8-24
(5) Setting the Brake ON Timing When Servomotor Running
The following parameters can be used to change the /BK signal output conditions when a stop reference is output
during servomotor operation due to the servo OFF or an alarm occurring.
Pn507 Brake Reference Output Speed Level
Setting Range Setting Unit Factory Setting Setting Validation
0 to 10000
min
-1 100 Immediately
Pn508 Timing for Brake Reference Output during Motor Operation
Setting Range Setting Unit Factory Setting Setting Validation
10 to 100
(100 to 1000 ms)
10 ms 50
(500 ms)
Immediately
/BK Signal Output Conditions When Servo-
motor Running
The /BK signal goes to high level (brake ON)
when either of the following conditions is satis-
fied:
• When the motor speed falls below the level set
in Pn507 after the servo OFF.
• When the time set in Pn508 is exceeded after
the servo OFF.
„ IMPORTANT
• The servomotor will be limited to its maximum speed even if the value set in Pn507 is higher than the maximum speed.
• Allocate the running output signal (/TGON) and the brake signal (/BK) to different terminals.
• If the brake signal (/BK) and running output signal (/TGON) are allocated to the same output terminal, the /TGON signal
will go to low level at the speed at which the movable part drops on the vertical axis, which means that the /BK signal will
not go to high level even if the conditions of this parameter are met. (This is because signals are output with OR logic
when multiple signals are allocated to the same output terminal.) For output signal allocations, refer to
7.3.3 Output Cir-
cuit Signal Allocation.
Speed Position Torque
Speed Position Torque
/S-ON input
Or alarm or
power OFF
Motor speed
Pn507
/BK output
Brake released
(Motor stopped by applying
DB or by coasting.)
Pn001.0
Pn508
Brake held
Servo ON
Servo OFF