Operation For Momentary Power Interruptions - YASKAWA SGD7S-****20A Series Product Manual

6.2 Operation for Momentary Power Interruptions

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).
Pn509
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.
Main circuit
power upply
etting of
Pn509
Motor power
tatu
Information
Important
6-16
Momentary Power Interruption Hold Time
Setting Range Setting Unit
20 to 50,000
etting of Pn509 ≥ Momentary power interruption time
Momentary power interruption
Momentary power
interruption ≤ Pn509
Pn509
Power upply
continued.
Power upplied.
Momentary power interruption
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 is approximately 100 ms. If
control operations become impossible during a momentary power interruption of the con-
trol 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.
Default Setting
1 ms 20
etting of Pn509 < Momentary power interruption time
Main circuit
power upply
etting of
Pn509
Motor power
tatu
Speed Position
When Enabled Classification
Immediately
Momentary power interruption
Pn509
Power not
upplied.
Power upplied.
Power hut OFF.
Momentary power interruption
Torque
Setup
Momentary power
interruption > Pn509