6671

Verify the alarm is transient by monitoring the NCK status. Access Diagnostics > NCK > Alarms menu on the HMI to confirm 6671 appears and disappears within 5-30 seconds during normal operations.

Do not power down the machine while alarm 6671 is active; this will corrupt the PCMCIA card file system.

Check if HMI operator initiated a parameter write or program download. Review the MMC operation log via Service > System Information > Event Log to identify what triggered the write cycle.

Allow the write operation to complete fully. Monitor the alarm disappearance and verify successful completion in the event log before resuming machine operations or shutting down.

Access the NCK parameter editor via Diagnostics > Parameters > Machine Data (MD). Navigate to MD 18000 and verify the NC_BACKUP_ENABLE setting (0=disabled, 1=enabled).

If MD 18000 = 1, check MD 18010 (NC_BACKUP_INTERVAL_TIME in seconds) to confirm backup frequency. Default is typically 3600 seconds (1 hour). Increase this value if frequent writes are undesirable.

If automatic backups are not required for your application, set MD 18000 = 0 to disable automatic PCMCIA writes. Ensure manual backups are performed via MMC if data retention is critical.

Access Diagnostics > System > Memory and verify PCMCIA card is detected and recognized by the NCK. Confirm card capacity and interface status (should show 'Ready' or 'Online').

If alarm 6671 persists for more than 2 minutes or repeats excessively, initiate a card health check via Service > Maintenance > Storage Media Diagnosis. This will test read/write performance and identify bad sectors.

If the card fails diagnostics or shows excessive write latency, prepare replacement PCMCIA card (typically CompactFlash or PCMCIA type compatible with your SINUMERIK generation). Back up all critical data to an external source before card replacement.