6.2 Operation for Momentary Power Interruptions
6-14
6.2
Operation for Momentary Power Interruptions
Even if the main power supply to the SERVOPACK is interrupted momentarily, power supply to
the motor (servo ON status) will be maintained for the time set in Pn509 (Momentary Power
Interruption Hold Time).
If the momentary power interruption time is equal to or less than the setting of Pn509, power
supply to the motor will be continued. If it is longer than the setting, power supply to the motor
will be stopped. Power will be supplied to the motor again when the main circuit power supply
recovers.
Pn509
(2509
hex)
Momentary Power Interruption Hold Time
Setting Range
Setting Unit
Default Setting
When Enabled
Classification
20 to 50,000
1 ms
20
Immediately
Setup
1. If the momentary power interruption time exceeds the setting of Pn509, the /S-RDY (Servo
Ready) signal will turn OFF.
2. If uninterruptible power supplies are used for the control power supply and main circuit
power supply, the SERVOPACK can withstand a power interruption that lasts longer than
50,000 ms.
3. The holding time of the SERVOPACK control power supply (24 VDC) depends on the
specifications of the 24-VDC power supply. Confirm the holding time yourself. If control
operations become impossible during a momentary power interruption of the control
power supply, the setting of Pn509 will be ignored and the same operation will be per-
formed as for when the power supply is turned OFF normally.
The holding time of the main circuit power supply depends on the output from the SERVOPACK.
If the load on the Servomotor is large and an A.410 alarm (Undervoltage) occurs, the setting of
Pn509 will be ignored.
Speed
Position
Torque
Pn509
Pn509
Momentary power interruption
Power shut OFF.
Power not
supplied.
Momentary power
interruption > Pn509
Power supplied.
Motor power
status
Setting of
Pn509
Main circuit
power supply
Momentary power interruption
Power supplied.
Power supply
continued.
Momentary power
interruption ≤ Pn509
Motor power
status
Setting of
Pn509
Main circuit
power supply
Momentary power interruption
Setting of Pn509 < Momentary power interruption time
Momentary power interruption
Setting of Pn509 ≥ Momentary power interruption time
Information
Important