120-002E

Identify Referenced Path

Press PGM MGT key and open the NC program that was running when alarm occurred. Search for CALL PGM, FN18:, or SEL CYCLE commands and note the exact path string shown in '%1' from error message.

Use FIND function (GOTO key) and search for 'TNC:/' or 'SYS:/' to quickly locate all path references in program

Verify Directory Structure

Navigate in PGM MGT to the parent directory of the referenced path. Check if all subdirectories exist exactly as spelled in program (Heidenhain paths are case-sensitive).

TNC:/ is the user partition, SYS:/ is system partition - ensure you're checking the correct root directory

Correct Path or Create Directory

Either edit the NC program to reference correct existing path, or create the missing directory using NEW DIRECTORY soft key in PGM MGT. Copy required files to new location if needed.

Do not create directories in SYS:/ partition without machine manufacturer authorization as this may affect system configuration

Test Program Execution

Reset control with CE key, restart NC program in single block mode (SINGLE BLOCK key active) and verify path access works correctly when reaching CALL or FN18 command.

Check Network Drive Status

Press MOD key, select SYSTEM INFO, then NETWORK. Verify network connection is active and IP address is assigned. Check if mounted drives appear in file manager PGM MGT.

Mounted network paths typically appear as additional drives beyond TNC:/ and SYS:/ in file manager

Review TNCcfg Mount Configuration

Access SYS:/etc/TNCcfg/smb.sys file (read-only access via PGM MGT). Verify UNC path syntax, server IP, share name, and credentials are correct. Format is //server_ip/share_name.

Editing system configuration files requires machine manufacturer permission and proper backup procedures

Test Network Connectivity

Use MOD > DIAGNOSTICS > NETWORK TEST to ping network file server. Verify physical network cable connection and switch port status.

If using managed switches, verify VLAN configuration allows TNC control IP to access file server subnet

Remount Network Drive

If mount configuration is correct but drive not accessible, power cycle the control (full shutdown and restart) to force remount of network shares during boot sequence.

Ensure no programs are running and all axes are in safe position before power cycling control

Check Tool Table Configuration

Press TOOL TABLE key, then select TABLE CONFIGURATION soft key. Check if 'Tool table path' field references external location. Verify this path exists in PGM MGT file manager.

Default tool table location is TNC:/table/tool.t - external paths are optional configuration for centralized tool management

Verify Preset Table Path

Press PRESET TABLE key, select TABLE CONFIGURATION. Check preset table file path setting. Default is TNC:/table/preset.pr - confirm referenced path exists if changed.

Multiple machines can share preset tables on network drive, but connection must be reliable to prevent this alarm

Reset to Default Table Paths

If external paths are problematic, reconfigure tables to use default local paths: TNC:/table/tool.t and TNC:/table/preset.pr. Copy table contents to local storage if needed.

Changing table paths requires machine parameter access level - coordinate with machine manufacturer

Restore Missing Table Files

If path is correct but files are missing, restore tool.t and preset.pr from backup directory TNC:/backup/ or from external backup media using PGM MGT copy function.