260-01FF

Access PLC configuration

Press MOD key, select 'PLC' menu, then 'Configuration' to view PLC.SYS file contents.

Always backup current configuration before making changes

Check syntax structure

Review PLC.SYS for missing semicolons, incorrect module declarations, or malformed parameter assignments in machine parameter sections.

Incorrect PLC configuration can affect machine safety functions

Validate module references

Verify all referenced PLC modules exist in the system and module numbers match between configuration and actual PLC program files.

Recompile PLC program

In PLC menu, select 'Compile' to test configuration validity and identify specific syntax error locations.

Check machine parameters

Access MOD > Machine Parameters and review parameters 7600-7699 (PLC-related parameters) for invalid entries or out-of-range values.

Verify parameter data types

Ensure integer parameters don't contain decimal values and string parameters don't exceed maximum character limits defined in TNC specifications.

Reset corrupted parameters

Restore affected machine parameters to default values using 'Reset to Default' function in machine parameter menu.

Document current parameter values before resetting for reference

Reload PLC configuration

Restart control system to reload PLC configuration with corrected machine parameter values.

List PLC modules

In PLC menu, select 'Module Overview' to display all configured PLC modules and identify missing or corrupted entries marked with error indicators.

Check file system integrity

Access file manager (PGM MGT key) and navigate to TNC:\PLC\ directory to verify physical presence of all referenced .PLC files.

Restore missing modules

Reload missing PLC modules from backup or machine manufacturer's original configuration files stored in TNC:\BACKUP\ directory.

Only use PLC modules specifically designed for your machine configuration

Rebuild module references

Update PLC.SYS configuration file to remove references to permanently deleted modules or add entries for newly restored modules.

Check software versions

Press HELP key, select 'Version Info' to display current TNC software version and compare with PLC module version requirements.

Review compatibility matrix

Consult HEIDENHAIN documentation to verify PLC module compatibility with installed TNC software version.

Keep version compatibility documentation readily available for future reference

Update PLC syntax

Modify PLC configuration to use syntax and parameters compatible with current TNC software version, removing deprecated functions.

Test configuration compatibility

Perform test compilation in PLC menu to verify all configuration elements are compatible with current software version.

Run file system check

Access MOD menu, select 'System Info' > 'File System Check' to scan for and repair file system errors in PLC directories.

Backup current configuration

Create backup of current PLC configuration using 'Export Configuration' function before attempting repairs.

File system repairs may result in data loss if not properly backed up

Restore from backup

If file system corruption is extensive, restore PLC configuration from known good backup stored on external media or network location.

Verify system integrity

Perform complete system restart and verify PLC compilation completes successfully without configuration errors.