130-00A4

Check available disk space

Press MOD key → select 'File Management' → check the status bar at bottom of screen showing free space on TNC:\ drive. Verify at least 100 MB free space is available.

The TNC requires free space not just for new files but also for temporary files during program execution and system logging. Aim for 10-15% free space minimum.

Delete unnecessary files

Navigate to TNC:\temp\ and TNC:\log\ directories and delete old log files, backup files (.bak), and temporary files. Also check TNC:\nc_prog\ for outdated programs.

Use the 'File Info' function (soft key) to sort by date or size to identify large or old files for deletion.

Check write protection

In File Manager, select the file or directory and press 'File Info' soft key. Check if 'Read Only' attribute is set. If so, use 'Change Attributes' soft key to remove write protection.

Do not remove write protection from system files in TNC:\system\ unless specifically instructed by service documentation.

Verify CF card physical lock

If alarm persists, power down control and check if CF card has physical write-protect switch in locked position. Move switch to unlocked position if needed.

Always perform a controlled shutdown via MOD → Shut Down before powering off to prevent file system corruption.

Verify network connectivity

Press MOD → select 'System Configuration' → 'Network Settings'. Check that IP address, subnet mask, and gateway are properly configured. Use 'Ping' function to test connectivity to file server.

On iTNC 530 and TNC 620/640, you can ping the server directly from the Diagnosis menu under 'Network Test'.

Check network drive mount status

In File Manager, navigate to the network path (typically shown as TNC://server/share or similar). If path shows error or is inaccessible, the mount has failed.

Network drives must be remounted after control restart. Check if auto-mount is configured in machine parameters.

Verify SMB credentials

Go to MOD → 'System Configuration' → 'Network Configuration' → 'File Systems'. Check that username and password for the SMB share are still valid and haven't expired.

Some facilities use Active Directory with periodic password expiration. Coordinate with IT department if credentials need updating.

Remount network drive

In File Management, delete the network path bookmark and re-add it. Test access by navigating to the remote directory and opening a file.

Create a test file on the network share from the control to verify both read and write access are functional.

Check for open editors

Press PGM MGT key to see list of open programs. Close any programs that may be accessing the file. Look for multiple file tabs in the editor window.

On TNC 640, use the 'Window Manager' (if enabled) to see all open applications and files simultaneously.

Verify program not in execution

Ensure the file you're trying to access is not currently selected for execution in any operating mode. Press 'Program Run' mode and verify a different program is selected.

Even in stopped state, the selected program may maintain a file lock. Select a different program or press 'End PGM' to release the lock.

Check tool table access

If alarm occurs when accessing tool.t or tchprobe.tp files, ensure no other user or remote session (VNC, TeleService) has the table open for editing.

Tool table files are frequently the cause of this alarm in multi-user environments with TeleService connections active.

Restart control to clear locks

If file locks cannot be identified, perform a controlled restart via MOD → 'Shut Down' → 'Reboot'. This will clear all file handles and locks.

After restart, immediately test file access before other processes or network connections are re-established.