YASKAWA SGD7S series Product Manual

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YASKAWA SGD7S series Product Manual Manual pdf 129 page image

4.2 SERVOPACKs with MECHATROLINK-III Communications References4.2.3 Troubleshooting Alarms4-614 Maintenance4.2.3 Troubleshooting AlarmsThe causes of and corrections for the alarms are given in the following table. Contact yourYaskawa representative if you cannot solve a problem with the correction given in the table.Alarm Number:Alarm Name Possible Cause Confirmation Correction ReferenceA.020:ParameterChecksum Error(There is an errorin the parameterdata in the SER-VOPACK.)The power supplyvoltage suddenlydropped.Measure the powersupply voltage.Set the power supply volt-age within the specifiedrange, and initialize theparameter settings.*1The power supplywas shut OFF whilewriting parameter set-tings.Check the timing ofshutting OFF the powersupply.Initialize the parametersettings and then set theparameters again.*1The number of timesthat parameters werewritten exceeded thelimit.Check to see if theparameters were fre-quently changed fromthe host controller.The SERVOPACK may befaulty. Replace the SER-VOPACK.Reconsider the methodfor writing the parame-ters.–A malfunction wascaused by noise fromthe AC power supply,ground, static elec-tricity, or other source.Turn the power supplyto the SERVOPACKOFF and ON again. Ifthe alarm still occurs,noise may be thecause.Implement countermea-sures against noise. *1Gas, water drops, orcutting oil entered theSERVOPACK andcaused failure of theinternal components.Check the installationconditions.The SERVOPACK may befaulty. Replace the SER-VOPACK.–A failure occurred inthe SERVOPACK.Turn the power supplyto the SERVOPACKOFF and ON again. Ifthe alarm still occurs,the SERVOPACK mayhave failed.The SERVOPACK may befaulty. Replace the SER-VOPACK.–A.021:Parameter For-mat Error(There is an errorin the parameterdata format in theSERVOPACK.)The software versionof the SERVOPACKthat caused the alarmis older than the soft-ware version of theparameters specifiedto write.Read the product infor-mation to see if the soft-ware versions are thesame. If they are differ-ent, it could be thecause of the alarm.Write the parameters fromanother SERVOPACK withthe same model and thesame software version,and then turn the powerOFF and ON again.*1A failure occurred inthe SERVOPACK. –The SERVOPACK may befaulty. Replace the SER-VOPACK.–A.022:System Check-sum Error(There is an errorin the parameterdata in the SER-VOPACK.)The power supplyvoltage suddenlydropped.Measure the powersupply voltage.The SERVOPACK may befaulty. Replace the SER-VOPACK.–The power supplywas shut OFF whilesetting a utility func-tion.Check the timing ofshutting OFF the powersupply.The SERVOPACK may befaulty. Replace the SER-VOPACK.–A failure occurred inthe SERVOPACK.Turn the power supplyto the SERVOPACKOFF and ON again. Ifthe alarm still occurs,the SERVOPACK mayhave failed.The SERVOPACK may befaulty. Replace the SER-VOPACK.–Continued on next page.