5 Operation
5.2.4 Holding Brakes
5-12
(3) Brake Signal (/BK) Allocation
The brake signal (/BK) is not allocated at shipment. Use parameter Pn50F.2 to allocate the /BK signal.
(4) Brake ON Timing after the Servomotor Stops
When the servomotor stops, the /BK signal turns OFF at the same time as the /S-ON signal is turned OFF. Use
parameter Pn506 to change the timing to turn OFF the servomotor power after the /S-ON signal has turned
OFF.
Parameter
Connector
Pin Number
Meaning
When
Enabled
Classifica-
tion
+ Terminal - Terminal
Pn50F
n.0
[Factory
setting]
– – The /BK signal is not used.
After
restart
Setup
n.1
CN1-25 CN1-26
The /BK signal is output from output
terminal CN1-25, 26.
n.2 CN1-27 CN1-28
The /BK signal is output from output
terminal CN1-27, 28.
n.3 CN1-29 CN1-30
The /BK signal is output from output
terminal CN1-29, 30.
When multiple signals are allocated to the same output terminal, the signals are output
with OR logic. For the /BK signal, do not use the output terminal that is already being
used for another signal.
Pn506
Brake Reference-Servo OFF Delay Time
Classification
Setting Range Setting Unit Factory Setting When Enabled
0 to 50 10 ms 0 Immediately Setup
• When using the servomotor to control a vertical
axis, the machine movable part may shift slightly
depending on the brake ON timing due to gravity or
an external force. To eliminate this slight shift, set
parameter so that the power to the servomotor turns
OFF after the brake is applied.
• This parameter changes the brake ON timing while
the servomotor is stopped.
/S-ON input
(CN1-40)
/BK
output
Power to motor
Brake released
(ON)
Servo ON
Power to motor
Brake applied
(OFF)
Servo OFF
No power to motor
Pn506
The servomotor will turn OFF immediately when an alarm occurs, regardless of the set-
ting of this parameter. The machine movable part may shift due to gravity or external
force before the brake operates.
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