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Access the Tool Management data via MMC: Diagnostics > Tool Management > Tool Table or via PLC interface. Verify the magazine slot assignment (column: Magazine/Pot) for the active tool number shown in alarm parameter %2.

Do not assume slot numbers are sequential; verify actual tool presence in the physical magazine.

Cross-check the tool's location data against the Tool Magazine Structure definition (MD 32610 - Magazine data). Confirm that the slot number in TOOL.TT corresponds to a valid magazine location defined in the magazine geometry parameters.

If the tool exists but in a different slot, update the magazine slot assignment in the tool table. Use Menu: Tool Management > Edit Tool > Magazine Location, or directly modify TOOL.TT via DNC if offline editing is permitted.

Verify MD 32615 (Magazine type) and MD 32620 (Number of magazine slots) match your physical magazine configuration before reassigning slots.

After correcting the tool location data, clear the alarm by pressing Reset and re-execute the tool selection command (SETTA or tool change).

Navigate to Diagnostics > Tool Management > Wear Groups. Identify which wear group contains the tool number shown in alarm parameter %2. Check if all tools in that wear group are physically present in their assigned magazine slots.

Wear groups are chain-linked; verify the entire group chain, not just the active tool.

Verify parameter MD 32650 is enabled and review MD 32651 (Wear monitoring type). If wear grouping triggered the alarm, confirm that the replacement tool slot assignment is valid and not pointing to an empty or previously occupied slot.

Rebuild or reassign the wear group chain via Tool Management > Wear Groups > Edit. Ensure each tool in the chain exists in the magazine at the slot address specified in TOOL.TT. Remove tools from the wear group if they are no longer available in the magazine.

After correcting the wear group assignment, reset the alarm and monitor the next tool life expiration event to confirm proper wear group selection.

In the MMC, navigate to Diagnostics > Tool Management > Magazine Status. Verify that all tool presence sensors report correct status. Cross-reference the NCK's magazine map display against the actual physical tool positions in the magazine.

Do not move tools manually while the machine is powered on; this causes sensor/NCK state mismatch.

If sensor discrepancies are detected, check PLC inputs assigned to tool presence detection. Review the PLC source code that writes to parameter DB (Tool Magazine DB) to confirm signal mapping. Verify that sensor wiring and connectors are secure.

Perform a magazine re-initialization via Tool Management > Magazine Functions > Initialize Magazine. This resets the NCK's internal magazine state map and re-scans all tool positions via sensors. Ensure all tools are physically present and correctly seated in their slots before starting initialization.

Magazine initialization may take several minutes; do not interrupt or reset the machine during this process.