10257

Check the operator panel HMI alarm buffer to verify if RESET was pressed or another command interrupted the REORG sequence.

Clear the alarm by pressing RESET and acknowledge the alarm condition.

Restart the block search or repositioning operation from the beginning without interruption.

Ensure no other operators or external signals can interrupt the sequence during REORG.

If alarm persists, check machine data MD20900 $MC_RESET_MODE_MASK to verify RESET behavior configuration is appropriate for your application.

Check the NC program size and complexity. Review if the program contains excessive subroutine nesting or large data blocks.

Verify available NCK memory by checking system resources in the diagnostics screen (Service > System Data).

Simplify the NC program if possible, reducing subroutine depth and breaking large programs into smaller segments.

Back up all NC programs before making modifications.

Perform a full NCK reset (cold start) to clear internal buffers: Service > NCK > Cold Restart.

Cold restart will clear all current offsets and settings. Document all offset values before proceeding.

Document the exact software version: Service > Version > Software. Note NCK, HMI, and PLC versions.

Check Siemens Service Notes and TIA Portal for known issues with alarm 10257 specific to your software version.

If available, review the possibility of upgrading to SW 4.x or later where this alarm no longer exists and REORG handling is improved.

Software upgrades require careful planning, backup, and potential machine data migration. Consult Siemens or authorized service partner.

As a workaround, avoid using block search with REORG on complex programs; instead use manual repositioning or approach position methods.