Sinumerik Alarm 6540 Too many directories in the NC memory
The number of directories in the file system of the NCK has reached the maximum limit.
– Alarm display.
• Delete or unload directory (e.g. workpiece), or
• Increase $MM_NUM_DIR_IN_FILESYSTEM.
Clear alarm with the Delete key or NC START.
- Siemens Diagnostics Guide by Siemens