Instantaneous Power Loss Settings - YASKAWA E-II Series User Manual

8.3.6 Instantaneous Power Loss Settings

Determines whether to continue operation or turn the servo OFF when the power supply voltage to the SERVO-
PACK 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 SERVO-
PACK output.
To continue SERVOPACK operation for a power loss that is longer than this, provide an uninterruptible power supply.
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Setting Unit
20 to 1000 1 ms
8.3 Setting Common Basic Functions
Speed
Factory Setting
20
Instantaneous power interruption
Power
supply
voltage
Servo ON
Pn509 > t
Servo ON
Pn509 < t
Position Torque
Setting Validation
Immediately
OFF time t
Operation
continued
Servo OFF
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