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Open the NC program indicated in the alarm (channel %1) and search for all channel ID assignments (look for CHAN statements or channel declarations).

Check the machine data MD28040 $MC_CHANNEL_NAME and MD28050 $MC_CHANNEL_ID to verify configured channel IDs and compare against program assignments.

Document existing machine data settings before making any changes.

Identify and correct any duplicate or conflicting channel ID numbers in the NC program, ensuring each channel has a unique valid ID.

Reset the control (POWER ON) and test the modified program to verify alarm is cleared.

Access HMI Service mode and navigate to machine data, then review MD20110 $MC_CHAN_NAME_TAB (channel name table) and MD20150 $MC_AXCONF_MACHAX_USED.

Enter service mode with authorization level 3 or higher (password required).

Verify that channel IDs in MD28050 $MC_CHANNEL_ID are within valid range (typically 1-10) and sequential without duplicates across mode group %2.

Cross-reference MD28000 $MC_MM_NUM_CHAN_IN_GROUP to ensure the number of channels matches the actual configured channels in the mode group.

Correct any invalid entries, save machine data, and perform a complete control reboot (POWER ON from main switch).

Backup all machine data to CF card or network drive before saving changes.

Boot the control into service boot mode (hold down '0' and '8' keys during power-up) to access file system diagnostics.

Service boot mode should only be used when standard access is not possible. Document all actions taken.

Navigate to the system directory and check integrity of channel configuration files (*.INI, *.TEA) for mode group %2 using file manager or command line.

Restore configuration files from the last known good backup or from archived commissioning data stored on CF card or network location.

Ensure backup files are from the same software version (SW 3.x) to avoid compatibility issues.

Perform a complete system restart and verify all mode groups and channels initialize correctly without alarms.