Output Timing Of /Bk (Brake) Signal When The Servomotor Is Stopped - YASKAWA SGD7S series Product Manual

5.13 Holding Brake

5.13.3 Output Timing of /BK (Brake) Signal When the Servomotor Is Stopped

Allocating the /BK (Brake) Signal
To use the brake, you must allocate an output signal for the /BK signal.
Set the allocation for the /BK signal in Pn50F = n.X (/BK (Brake Output) Signal Alloca-
tion).
Pn50F
Important
5.13.3 Output Timing of /BK (Brake) Signal When the
Servomotor Is Stopped
When the Servomotor is stopped, the /BK signal turns OFF at the same time as the /S-ON sig-
nal turns OFF. Use the servo OFF delay time (Pn506) to change the timing to turn OFF power
supply to the motor after the /S-ON signal turns OFF.
Pn506
• When the Servomotor is used to control a verti-
cal axis, the machine moving part may move
slightly due to gravity or an external force.
You can eliminate this slight motion by setting
the servo OFF delay time (Pn506) so that
power supply to the motor is stopped after the
brake is applied.
• This parameter sets the timing of stopping
power supply to the Servomotor while the Ser-
vomotor is stopped.
5-38
Connector Pin No.
Parameter
+ Pin
 
n. 0
−
(default setting)
 
n. 1 CN1-25
 
n. 2 CN1-27
 
n. 3 CN1-29
1. Signals other than the /BK signal are allocated to the connector pins by default. To allocate
connector pins to the /BK signal, you must clear the allocations for the originally allocated sig-
nals.
Example: Allocating the /BK Signal to CN1-25 and CN1-26
By default, the /COIN (Positioning Completion) signal is allocated to CN1-25 and the /V-CMP
(Speed Coincidence Detection) signal is allocated to CN1-26. Therefore, to allocate the con-
nector pins to the /BK signal, you must change the settings of the following two parameters.
• Pn50F = n.1 (Output the /BK signal from CN1-25 and CN1-26.)
• Set Pn50E = n.XX to a value other than 1. (This clears the allocations of the /COIN and /
V-CMP signals to CN1-25 and CN1-26.)
2. If you allocate more than one signal to the same output connector pin, a logical OR of the sig-
nals is output. Allocate the /BK signal to its own output connector pin, i.e., do not use the
same output terminal for another signal.
For example, never allocate the /TGON (Rotation Detection) signal and /BK signal to the same
output connector pin. If you did so, the /TGON signal would be turned ON by the falling speed
on a vertical axis, and the brake would not operate.
Brake Reference-Servo OFF Delay Time
Setting Range
0 to 50
Meaning
- Pin
−
The /BK signal is not used.
The /BK signal is output from
CN1-26
CN1-25 and CN1-26.
The /BK signal is output from
CN1-28
CN1-27 and CN1-28.
The /BK signal is output from
CN1-30
CN1-29 and CN1-30.
Setting Unit Default Setting
10 ms 0
Motor power tatu
When
Enabled
After restart
Speed Position
When Enabled
Immediately
/ -ON input
OFF
ON
(CN1-40)
ON (Brake
relea ed.)
/BK ignal OFF (Brake applied.)
Power upplied
to motor.
Pn506
Classification
Setup
Torque
Classification
Setup
Power not
upplied to
motor.