Summa Series Servodrive Product Manual
Application Functions
Document Version: V1.01
(Dec, 2019)
© 2019 ESTUN Automation Co., Ltd. All right reserved.
7-7
7.5.2
Brake Operating Sequence
You must consider the time required to release the brake and the time required to brake to determine the
brake operation timing, as described below.
Servo ON command
Brake contact section
(lining)
Servo OFF
Servo ON
Servo OFF
Motor power status
Power not
supplied
Power supplied
Power not
supplied
/BK (Brake) signal
OFF
ON
OFF
Brake applied.
Brake released.
Brake applied.
Speed reference
Motor Speed
(1)
(1)
(2)
(3)
(1): The brake delay times for Motors with Holding Brakes.
(2): Before you output a reference from the host controller to the Drive, wait for at least 50 ms plus the time required
to release the brake after you send the S-ON command.
(3): Use Pn506 (Servo OFF Waiting Time), Pn507 (Brake Enable Speed Threshold), and Pn508 (Brake Enable
Waiting Time) to set the timing of when the brake will operate and when the servo will be turned OFF.
NOTE
Time Required to Release Brake: The time from when the /BK (Brake)
signal is turned ON until the brake is actually released.
Time Required to Brake: The time from when the /BK (Brake) signal is
turned OFF until the brake actually operates.
7.5.3
/BK (Brake) Signal
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 Waiting time (Pn506).
Type
Signal
Pin
Signal Status
Meaning
Output
/BK
Allocated by Pn511
ON
Releases the brake.
OFF
Activates the brake.
The /BK signal is not allocated in default setting, set its allocation in Pn511.
Parameter Setting + Pin
- Pin
Meaning
Pn511.0
4
CN1-6
CN1-7
The /BK signal is output from CN1-6 and CN1-7.
Pn511.1
4
CN1-10 CN1-11 The /BK signal is output from CN1-10 and CN1-11.
Pn511.2
4
CN1-12 CN1-13 The /BK signal is output from CN1-12 and CN1-13.
