5 Operation5.2.6 Instantaneous Power Interruption Settings5-165.2.6 Instantaneous Power Interruption SettingsDetermines whether to continue operation or turn OFF the servomotor’s power when the power supply voltageto the main circuit power supply of the SERVOPACK and converter is interrupted.If the power interruption time is shorter than the set value in Pn509, the servomotor will continue operation. Ifit is longer than the set value, the servomotor’s power will be turned OFF during the power interruption. Theservomotor is turned ON when power supply to the main circuit recovers.Note: If the instantaneous power interruption is longer than the set value of Pn509, the /S-RDY signal turns OFF.If the uninterruptible power supplies are used for the control power supply and main circuit power supply, theSERVOPACK can withstand an instantaneous power interruption period of 50,000 ms max.Pn509Instantaneous Power Cut Hold Time ClassificationSetting Range Setting Unit Factory Setting When Enabled20 to 50000 1 ms 20 Immediately Setup• If the control power supply makes control impossible during an instantaneous powerinterruption, the same operation will be performed as for normally turning OFF thepower supply, and the setting of Pn509 will be ignored.• The holding time of the main circuit power supply varies with the output of the SER-VOPACK. If the load on the servomotor is large and an undervoltage alarm (A.410)occurs, the setting of Pn509 will be ignored.• The holding time of the control power supply (24 VDC) depends on the capability ofthe power supply (not provided by Yaskawa). Check the power supply before usingthe application.Speed Position TorqueInstantaneous power interruptionSet value for Pn509 ≥ OFF time (t)Instantaneous power interruptionOFF time (t)Power OFFSet value forPn509 ≥ OFF time (t)Set value forPn509 < OFF time (t)Main circuitpower supplySet value forPn509Servomotorstatus Power ONInstantaneous power interruptionSet value for Pn509 < OFF time (t)Instantaneous power interruptionForced OFFOFF time (t)Main circuitpower supplySet value forPn509Servomotorstatus Power ONOperationcontinues.
