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Press the NCK RESET button or perform a power-on reset to enter start-up state

This will interrupt current operations - ensure machine is safe and no programs are running

Navigate to Commissioning mode: Press MENU SELECT → Commissioning → Set protection level 10 = 30 (Parameter Reset)

Requires password level 2 (Service) or higher access rights

Make the required parameter changes to the specific machine data or setting data

Perform NCK RESET to activate changes and return to normal operation mode

All changes take effect after reset - verify machine behavior after restart

Identify the program triggering the alarm - check alarm log for channel/block number and timestamp

Review NC program or PLC FC/FB for WRITA, SETMS, NEWCONF, or direct parameter write commands

Remove unauthorized parameter write commands or restructure logic to only execute during authorized commissioning periods

Verify with machine builder documentation if parameter writes are intentional for automatic tool correction or adaptive control

If writes are necessary, implement proper protection level checking using $A_SETLEV in NC or DB19.DBB2 in PLC before write attempts

Never hardcode protection level changes in production programs

Check HMI Advanced user interface or custom screens for parameter input fields that write directly to machine data addresses

Review any active OPC UA, S7 communication, or third-party software connections for parameter write attempts in the communication logs

Modify HMI logic or external interface to check NCK status and protection level before attempting writes, or implement read-only access for production mode

External write access to NCK parameters should be restricted to authorized commissioning tools only

If legitimate access is required, coordinate with machine operator to enter start-up mode (p10=30) before external parameter modification sessions

Document all parameter changes and verify machine safety after modifications