16699

Access Diagnostics > Machine Data menu and navigate to MD 32200 (Coupling Type) for the channel and axis specified in the alarm. Verify that a coupling type (1=Spindle-to-Axis, 2=Axis-to-Spindle, etc.) is assigned to the following axis.

Check MD 32210 (Coupled Leading Axis/Spindle Name) for the following axis. The leading axis/spindle name must exactly match a configured real axis or spindle identifier in the system. Verify character-for-character spelling against the axis definition in MD 1008 or spindle names in the Configuration.

Leading axis name is case-sensitive; 'SPINDLE1' is not equivalent to 'Spindle1'.

Confirm that the leading axis/spindle exists in the machine configuration. Access NCK > Axes/Spindles menu and verify the leading axis/spindle is active and not disabled via MD 3000 (Axis/Spindle Available).

Save machine data changes and perform a cold restart (Ctrl+Shift+F9) to reload the NCK kinematic configuration. Attempt the same NC block again and monitor the alarm queue.

Open Diagnostics > Machine Data and navigate to the following axis in the alarm. Check that MD 32200, MD 32210, MD 32220, and MD 32230 (Coupling Offset) all contain valid, non-empty values. Empty or 'undefined' entries will trigger 16699.

Verify MD 32210 value matches exactly one of the real axis names defined in MD 1008 (axis identifiers) or the spindle name defined in the spindle configuration. Run a text comparison if necessary to exclude whitespace or hidden characters.

Use Siemens Configuration Editor to auto-populate coupling parameters to avoid manual transcription errors.

Check the NC program G-code syntax. Ensure the instruction uses the correct axis/spindle identifier. Common errors: typo in axis name (e.g., 'SPINDLE' vs. 'SPINDLE1'), or referencing an axis that is not active in the channel.

Verify the leading axis/spindle is enabled by checking MD 3000 (Axis/Spindle Available) in Diagnostics > Machine Data. The value must be 1 (enabled). If 0, set to 1, save, and restart.

Confirm the leading axis/spindle is assigned to the correct channel. Navigate to Diagnostics > Channel Configuration and verify the channel contains the leading axis/spindle in its axis/spindle list. Multi-channel systems require explicit channel-to-axis assignment via MD 6100 (Channel Axis Mapping).

Review the PLC program (if applicable) for any disable commands targeting the leading axis/spindle. Search for DISABLE_AXIS or SET_AXIS_INACTIVE calls that may deactivate the leading partner. Coordinate with controls programmer to ensure PLC logic does not conflict with NC coupling requirements.