4220

Navigate to Diagnostics > Machine Data (MD) > 32000-series (Spindle Parameters) for the affected channel.

Review MD 32100 (SPINDLE_ASSIGN) and MD 32110 (SPINDLE_DATA_ADDRESS) entries. Verify that spindle numbers in column 'Spindle' are unique and do not repeat (e.g., Spindle 1 should appear only once).

Do not confuse spindle number with axis coupling. Check both the spindle identifier and the physical spindle reference.

If duplicates are found, modify the second occurrence to an unused spindle number (e.g., change from Spindle 1 to Spindle 2) or remove the duplicate entry if it is erroneous.

Save changes and perform an NCK reset (POWER ON/OFF cycle or use Diagnostics > Reset NCK). Verify alarm 4220 is cleared.

Machine must be in a safe state before reset. Ensure no active programs are running.

Access the channel configuration via Diagnostics > Configuration > Channel [X] > Spindle Assignment tab.

Cross-reference the spindle numbers listed in the active channel configuration with the machine data (MD) spindle parameters. Identify any spindle IDs that appear in both locations.

Check if a backup or imported CDF/configuration file is active and conflicting with the current MD settings.

Remove or comment out the duplicate spindle declaration from the less critical source (typically the imported file or backup configuration). Ensure only one authoritative spindle definition exists per channel.

Reload the channel configuration and perform an NCK reset. Monitor the alarm log to confirm alarm 4220 does not recur.

Open Diagnostics > Configuration > Channel [X] and review all spindle definition tabs (Main Spindle, Sub-Spindle 1, Sub-Spindle 2, etc.). Document each declared spindle number.

Verify that each physical spindle (e.g., main drive motor) is assigned to exactly one logical spindle slot. If spindle coupling or axis substitution is required, use only one primary assignment and configure the secondary via axis coupling (MD 37000-series), not duplicate spindle declarations.

Do not use duplicate spindle numbers for redundancy or failover; use separate spindle numbers and manage coupling in PLC or axis assignment logic.

Correct the channel configuration by renaming or removing the duplicate spindle entry. Ensure the spindle assignment aligns with the physical hardware topology.

Save the corrected configuration, perform an NCK reset, and verify spindle functionality via the spindle control panel (DCC or HMI). Confirm alarm 4220 is resolved.