27035

Navigate to Diagnostics > Alarms > 27035 in the HMI and note which axis (%1 parameter) triggered the alarm and whether it references encoder or motor module mismatch.

Access the NCK parameterization menu (typically via HMI or SINUMERIK Operate interface) and check MD30110 (encoder manufacturer ID), MD30111 (encoder serial number), or equivalent motor module identification parameters for the affected axis.

Physically verify the hardware component installed matches the expected type. If a replacement was performed, use diagnostic readout (Drives > Axis diagnostics > Hardware IDs) to confirm the new component's reported ID and update the corresponding MD parameters accordingly.

Do not confirm acceptance of mismatched hardware if the physical component does not match maintenance records or installation documentation.

After updating MD parameters to match the actual hardware, perform a warm restart (mode switch to Manual, then back to Auto) and execute the confirmation sequence in the alarm dialog to clear alarm 27035.

Export current axis parameters using SINUMERIK Operate or HMI parameter export function (typically Maintenance > Backup/Restore > Parameter Export) to capture the existing MD30110, MD30111, and motor module identification block.

Compare exported parameters against commissioning documentation or the last known-good backup. Use the drive's built-in hardware diagnostics (HMI > Diagnostics > Drive Hardware or Siemens Drive Configuration Tool) to read the actual hardware component IDs from the encoder and motor module.

If discrepancies exist, manually update the affected MD parameters to match the physically confirmed hardware IDs. Ensure changes are written to both the NCK and the axis-specific parameter partition.

Verify parameter write-protect status (MD25000, MD25001) is disabled before editing hardware ID parameters; re-enable after confirmation.

Perform a controlled power cycle (POWER OFF for ≥10 seconds, then POWER ON) to allow the NCK to re-synchronize parameter tables with drive electronics, then acknowledge the 27035 confirmation dialog.

Check the current firmware versions via Diagnostics > System Info > Component Versions (NCK version, Servo Drive firmware, Motor Module firmware). Compare against the machine's approved firmware baseline documentation.

If firmware versions are mismatched or recently updated, consult the Siemens release notes for the specific firmware version pair to confirm hardware ID protocol compatibility. If incompatible, plan a synchronized firmware update following Siemens service bulletin guidelines.

If firmware versions are aligned, perform a full axis re-commissioning sequence: reset the affected axis parameters to factory defaults (via Maintenance > Reset Parameters > Axis-specific reset), then re-enter hardware identification during the commissioning wizard.

Full parameter reset will erase custom tuning values; ensure a complete parameter backup exists before proceeding.

Complete the commissioning wizard, which will scan and automatically populate the correct hardware IDs (MD30110, MD30111, motor module data), then confirm acceptance in the 27035 alarm dialog.