105000

Read the complete alarm text on the HMI to identify the specific error code (%1) and error description (%2) that replace the placeholders.

Note the NC program block number and line where the alarm occurred from the alarm display or program editor.

Cross-reference the specific error code from %1 with the SINUMERIK diagnostic manual to identify the exact parameter or syntax issue.

Correct the identified syntax error, parameter value, or undefined variable in the NC program and reset the alarm before restarting.

Always create a backup of the original program before making modifications.

Access the detailed alarm information and identify which axis, tool number, or configuration parameter is referenced in the %2 description.

Navigate to Commissioning mode and verify the relevant machine data (MD) settings for the referenced axis, coordinate system, or function.

Access to machine data requires appropriate password level (typically level 2 or 3).

Check if the referenced tool number exists in the tool management system or if the work offset (G54-G59, etc.) is properly defined.

Correct the machine data configuration or modify the NC program to use valid references, then clear the alarm and test the program.

Document all machine data changes for future reference and backup settings before modification.

Check the PLC diagnostics and status to verify normal communication between NCK and PLC, looking for any related PLC alarms.

If the error references a cycle (e.g., CYCLE82, LONGHOLE), verify the cycle definition files are present and not corrupted in the system directory.

Review the NCK diagnostic buffer (Diagnostics > NCK > Diagnostic Buffer) for additional error messages that occurred before alarm 105000.

If corruption is suspected, restore the affected cycle files from backup or perform a selective system data restore from a known good configuration.

Always perform a complete system backup before restoring system files. Contact Siemens support if system file corruption is confirmed.