Instantaneous Power Loss Settings; Motor Maximum Speed (For The Software Version 32 Or Later) - YASKAWA SGLFW User Manual

9.6.5 Instantaneous Power Loss Settings

Determines whether to continue operation or turn the servo OFF when the power supply voltage to the
SERVOPACK main circuit is instantaneously interrupted.
Pn509 Instantaneous Power Cut Hold Time
Setting Range
In power loss detection, the status of the main circuit power supply is detected and OFF status is ignored so servomotor
operation will continue if the servomotor turns back ON within the time set in parameter Pn509.
In the following instances, however, the parameter setting
will be invalid.
• If an insufficient voltage alarm (A.41) occurs during a
power loss with a large servomotor load.
• When control is lost (equivalent to normal power OFF
operation) with loss of the control power supply.
IMPORTANT
The maximum setting for the hold time during a power
loss is 1,000 ms, but the hold time for the SERVOPACK
control power supply is about 100 ms. The hold time for
the main circuit power supply depends on the
SERVOPACK output.
To continue SERVOPACK operation for a power loss that is longer than this, provide an uninterruptible power supply.

9.6.6 Motor Maximum Speed (For the software version 32 or later)

Sets the linear servomotor maximum speed.
Setting a lower speed realizes more delicate speed control and more strict protection by generating the overspeed
alarm (A.51.) Also, setting a lower speed allows the upper limit of PG divider (Pn281) to be set higher. Refer to
9.7.7 Encoder Signal Output for details.
Pn384 Motor Maximum Speed
• If a value lower than the rated speed is set for Pn384, the rated speed becomes the same value as the setting of Pn384.
• The detection level for the overspeed alarm A.51 is "the set value of Pn384 × 1.1."
Setting Unit
20 to 1000
Setting Range Setting Unit
1 to 100
(0.1 to 10.0 m/s)
Factory Setting
ms 20
Power
supply
voltage
Servo ON
Pn509 > t
Servo ON
Pn509 < t
Factory Setting
0.1 m/s 50
(5.0 m/s)
9.6 Setting Common Basic Functions
Speed Position Force
Setting Validation
Immediately
Instantaneous power interruption
OFF time t
Operation
continued
Servo OFF
Speed Position
Force
Setting Validation
After Restart
9
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