16697

Access Siemens SINUMERIK HMI: Navigate to Diagnosis > Machine Data > Spindle/Axis Parameters. Locate MD 37100 ff. (CfgSpindleCoupling) to verify coupling definitions.

Do not edit machine data without proper authorization; contact machine builder.

Cross-reference the coupling number in the failing NC block (Channel %1, Block %2) with the defined couplings in MD 37100-37199. Confirm the coupling ID matches an active entry.

If coupling is missing, configure it via HMI > Customize > Machine Data or use SINUMERIK edge commissioning software. Define spindle source (MD 37110), axis target (MD 37111), and coupling mode (MD 37120).

Save machine data (Ctrl+S), perform NCK cold start/reset (System > Reset), and retry the NC program.

Review the failing NC block (Block %2) and identify the COUP command syntax (e.g., COUP=1, COUP=3). Extract the coupling number being called.

Compare the coupling number against valid couplings listed in MD 37100 array. Use HMI Diagnostics > Machine Data filtering to list all active CfgSpindleCoupling entries.

Correct the NC program with the valid coupling number, or verify with the machine builder's coupling documentation that the intended coupling exists and is enabled (MD 37101, bit 0).

Reload the corrected NC program and verify the coupling parameter (%3) in the alarm now matches a defined coupling.

Navigate to HMI > Diagnosis > Machine Data > Spindle Couplings. Locate the coupling referenced in alarm (%3) and check the Enable flag in MD 37101 for that coupling slot.

If the Enable bit (bit 0) is 0 or unchecked, verify with machine setup documentation whether this coupling should be active. Enable it if appropriate by setting MD 37101, bit 0 = 1.

Enabling a coupling without proper mechanical setup (e.g., missing encoder) may cause runtime errors; verify hardware first.

Confirm that the spindle and axis referenced in the coupling (MD 37110 source, MD 37111 target) are correctly configured and operational.

Save machine data, perform NCK reset, and retest the NC program.