Yaskawa MP940 - Manual (Page 308)

Parameters
6.4.7 Sequence-related Parameters
6-68
Pn506
Brake Reference
Servo OFF Delay
Time 10 ms
0 to 50 Brake ON Timing
(Timing when motor is stopped)
If the equipment moves slightly due to gravity when the brake is
applied, set Pn506 to adjust brake ON timing.
This parameter is used to set the output time from the brake control
signal /BK until the servo OFF operation (servomotor output stop)
when a servomotor with a brake is used.
With the standard setting, the servo is turned OFF when the /BK
signal (brake operation) is output. The equipment may move
slightly due to gravity depending on equipment configuration and
brake characteristics. If this happens, use this parameter to delay
servo OFF timing.
Holding Brake Setting (Brake operation when motor is rotating)
Set Pn507 and Pn508 to adjust brake ON timing so the holding
brake is applied when the servomotor stops.
Set the brake timing used when the servo is turned OFF by input
signal S-ON (OBC0010)or when an alarm occurs during servomo-
tor with brake operation.
Brake ON timing when the servomotor stops must be adjusted
properly because servomotor brakes are designed as holding
brakes. Adjust the parameter settings while observing equipment
operation.
/BK Signal Output Conditions During Servomotor Operation
The circuit is open under either of the following conditions:
• Motor speed drops below the setting at Pn507 after servo OFF.
• The time set at Pn508 has elapsed since servo OFF.
The actual setting will be the maximum speed even if Pn507 is set
higher than the maximum speed.
0 Speed
Torque
Position
Pn507
Brake Reference
Output Speed Level r/min
0 to 10000 100 Speed
Torque
Position
Pn508
Timing for Brake
Command Output
during Servo OFF 10 ms
10 to 100 50 Speed
Torque
Position
Parameter No. Digit
Name (Setting
Range)
Details Default
Control
Modes
（ OBC0020）
S-ON input
/BK output
Servo ON/OFF
operation (Servo-
motor ON/OFF
status)
Servo ON
Release
brake
Servo-
motor
Servo OFF
Hold with brake
Servomotor
OFF
Servo OFF
time delay
Pn-507
Pn508
Power OFF by S-
ON (OBC0010)
input or alarm
occurrence
Motor speed
(r/min)
/BK output
Servo ON Servo OFF
Stop by dynamic
brake or coast to a
stop. (Pn001.0)
Release
brake
Hold with brake