APPLICATIONS OF Σ-SERIES PRODUCTS3.7.6 Handling of Power Loss134D TGON (1CN-9)D Status indication mode bit dataD Monitor mode Un-05 bit 4User Constant Setting:Memory switch Cn-01 bit 4 = 03.7.6 Handling of Power Loss1) Use the following memory switch to specify whether to clear or hold a servo alarm thatoccurred at power loss.Cn-01 Bit 5 Operation to Be Performed atRecovery from Power LossFactorySetting: 0For Speed/Torque Controland Position ControlIf the Servopack detects instantaneous voltagedrop in power supply, it outputs alarm A.F3 to pre-vent a hazardous situation.Select the operation to be performed when volt-age is recovered after alarm occurrence.Setting Meaning0 Holds servo alarm even after recovery from power loss.ALM output remains OFF (circuit between 1CN-34 and 1CN-35 remains open).1 Clears servo alarm after recovery from power loss.ALM output remains ON (circuit between 1CN-34 and 1CN-35 is closed).2) If this memory switch is set to “1” (to clear servo alarm), power loss is not stored as alarmtraceback data.TERMS Alarm traceback dataThe SGDA Servopack stores up to 10 last alarms as alarm data. This alarm data can bedisplayed with a Digital Operator. For details, refer to 4.2.1 Operation in Alarm Trace-backMode.3Motorspeed200 or100 VsupplyvoltagePower lossCn-01 bit 5 = 0Cn-01 bit 5 = 1
