YASKAWA Sigma-7 SGD7S Series - 6.12.3;BK (Brake) Signal

Model Voltage Time Required to
Release Brake
[ms]
Time Required to
Brake [ms]
SGM7G-03 to -20 100 80
SGM7G-30 to -44 170 100
SGM7G-55 to -1A 80
SGM7G-1E 250
Linear Servomotors: The brake delay times depend on the brake that you use. Set the
parameters related to /BK signal output timing according to the delay times for the brake
that you will actually use.
*2. Before you output a reference from the host controller to the SERVOPACK, wait for at
least 50 ms plus the brake release delay time after you send the SV_ON command.
*3. Use the following parameters to set the timing of when the brake will operate and
when the servo will be turned OFF
n Rotary Servomotors: Pn506 (Brake Reference-Servo OFF Delay Time), Pn507 (Brake
Reference Output Speed Level), and Pn508 (Servo OFF-Brake Reference Waiting
Time)
n Linear Servomotors: Pn506 (Brake Reference-Servo OFF Delay Time), Pn508 (Servo
OFF-Brake Reference Waiting Time), and Pn583 (Brake Reference Output Speed
Level)
Refer to the following section for information on brake wiring.
Ä Chap. 5.5.4 ‘Wiring the SERVOPACK to the Holding Brake’ page 114
6.12.3 /BK (Brake) Signal
The following settings are for the output signal that controls the brake. You can change
the connector pin that is allocated. For details, refer to Ä ‘Allocating the /BK (Brake)
Signal’ page 169.
The /BK signal is turned OFF (to operate the brake) when the servo is turned OFF or
when an alarm is detected. You can adjust the timing of brake operation (i.e., the timing of
turning OFF the /BK signal) with the servo OFF delay time (Pn506).
Type Signal Connector Pin
No.
Signal Status Meaning
Output /BK CN1-1, CN1-2 ON (closed) Releases the brake.
OFF (open) Activates the brake.
The /BK signal will remain ON during overtravel. The brake will not be
applied.
Set the allocation for the /BK signal in Pn50F = n.X (/BK (Brake Output) Signal Allo-
cation).
Connection Examples
Allocating the /BK (Brake)
Signal
Sigma-7 Series SERVOPACKs
Basic Functions That Require Setting before Operation
Holding Brake > /BK (Brake) Signal
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