YASKAWA SERVO Manuel d'utilisateur Page 68

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5 Parameter Setting and Functions
5.3.4 Braking Signal (/BK)
5-8
The setting of the /ALM-RST signal can be changed with the parameter below.
5.3.4 Braking Signal (/BK)
This output signal controls the brake.
The /BK signal turns OFF when an alarm is detected or the servomotor power is OFF. The brake OFF timing
can be adjusted with Pn506.
The setting of the /BK signal can be changed with the parameters below.
Parameter Meaning When Enabled
PnB52
0
[Factory setting]
Resets alarms by switching input signal from OFF (open) to ON
(close).
After restart
1
Resets alarms by switching input signal from ON (close) to OFF
(open).
2
Does not reset alarms. (Signal is ignored.)
3
• Inverting the polarity of the brake output signal (/BK), i.e. positive logic, will prevent
the holding brake from working in case of its signal line disconnection.
If this setting is absolutely necessary, check the operation and confirm that there are
no safety problems.
• Configure the relay circuit to apply the holding brake by the emergency stop.
• Failures caused by incorrect wiring or wrong voltage application in the brake circuit
may damage the equipment or cause an accident resulting in death or injury.
Follow the procedures and instructions for wiring and trial operation precisely as
described in the manual.
Relay Circuit Example
0V
Emergency stop
5 to 24 VDC
SERVOPACK
Photocoupler
Type Name
Connector
Pin No.
Setting Meaning
Output /BK CN1-23, CN1-24
ON (close) Releases the brake.
OFF (open) Applies the brake.
Parameter Meaning When Enabled
PnB1D
0
[Factory setting]
When the /BK signal is ON (close), the brake is released.
After restart
1 When the /BK signal is OFF (open), the brake is released.
PnB51
0
[Factory setting]
Does not output /ALO1 to /ALO3. (/WARN, /BK, and /S-RDY are
output.)
After restart
1
Outputs /ALO1 to /ALO3. (/WARN, /BK, and /S-RDY are not out-
put.)
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