Yaskawa SGDB - Manual (Page 124)

APPLICATIONS OF Σ-SERIES PRODUCTS
3.4.4 Using Holding Brakecont.
112
J Settings
Set the following parameters to adjust brake ON timing so that holding brake is applied
when the motor stops.
Cn-15 BRKSPD
Speed Level at which
Brake Signal Is Output
during Motor Operation
Unit:
min −1
Setting
Range:
0 to 10000
Factory
Setting:
100
For
Speed/Torque
Control and
Position
Control
Cn-16 BRKWAI
Output Timing of Brake
Signal during Motor
Operation
Unit:
10 ms
Setting
Range: 10
to 100
Factory
Setting:
50
For
Speed/Torque
Control and
Position
Control
Cn-15 and Cn-16 are used for SGMj servomo-
tors with brake. Use these parameters to set
brake timing used when the servo is turned OFF
by input signal /S-ON (1CN-40) or alarm occur-
rence during motor rotation.
Brakes for SGMj servomotors are designed as
holding brakes. Therefore, brake ON timing when
the motor stops must be appropriate. Adjust the
parameter settings while observing machine op-
eration.
• Conditions for /BK signal output during motor
operation. The circuit is opened in either of the
following situations.
1 Motor speed drops below the value set in Cn-15 (BRKSPD) after servo OFF occurs.
2 The time set in Cn-16 (BRKWAI) has elapsed since servo OFF occurred.
If a value higher than the maximum speed is set, the maximum speed value is used.
3
Brake Timing when Motor is in Stopped Status
Power OFF by
/S-ON input
(1CN-40) or
alarm
occurrence
Servo ON
Servo OFF
Motor speed
(min −1 )
Stop by dynamic
brake or coasting
to a stop (Cn-01
bit 6)
BRKSPD
(Cn-15)
/BK output Release
brake
Apply brake
BRKWAI
(Cn-16)
When this time elapses, /BK signal is output.