10.1 Alarm and Warning Displays10.1.2 List of Alarms10-310 MaintenanceAn example of the System Monitor Dialog Box when an alarm has occurred is shown below.10.1.2 List of AlarmsThe list of alarms gives the alarm name, alarm meaning, and alarm reset possibility,* in order ofthe alarm numbers.* Yes:You can use an alarm reset to clear the alarm. However, this assumes that the cause of the alarm has beenremoved.No: You cannot clear the alarm.AlarmNumber Alarm Name Alarm Meaning Alarm ResetPossible?A.020 Parameter Checksum Error There is an error in the parameter data in theSERVOPACK. NoA.021 Parameter Format Error There is an error in the parameter data format inthe SERVOPACK. NoA.022 System Checksum Error There is an error in the parameter data in theSERVOPACK. NoA.030 Main Circuit Detector Error There is an error in the voltage detection data. YesA.040 Parameter Setting Error A parameter setting is outside of the settingrange. NoA.042 Parameter Combination Error The combination of some parameters exceedsthe setting range. NoA.04A Parameter Setting Error 2 A PnB parameter setting is outside of thesetting range. NoA.050 Combination Error A Servomotor with an unsupported capacity isselected in the parameters. YesA.051 Unsupported Device Alarm An unsupported Servomotor was selected inthe parameters. NoA.0B0 Invalid SERVO ON CommandAlarmThe /S-ON (SERVO ON) signal was input fromthe host controller after a SigmaWin+ functionthat supplies power to the Servomotor wasexecuted.YesA.100 Overcurrent Detected An overcurrent flowed through the power tran-sistor. NoA.400 Overvoltage The main circuit DC voltage is too high (32 V orhigher). YesA.510 Overspeed The motor exceeded the maximum speed. YesA.6B0 Emergency Stop Operation Fail-ureThe motor did not stop within 10 s of when theemergency stop signal was input. YesA.710 Instantaneous OverloadThe Servomotor was operating for several sec-onds to several tens of seconds under a torquethat largely exceeded the rating.YesA.720 Continuous Overload The Servomotor was operating continuouslyunder a torque that exceeded the rating. YesA.840 Encoder Data Alarm The amplitude of the encoder signal is too smallor an error occurred in the A/D converter. NoContinued on next page.