27207

Access Siemens HMI or Engineering Station and navigate to Diagnostics > Machine Data > MD 32050 (PROFISAFE configuration group) or relevant safety module MDs to identify the configured sub slot number in position %1[%2].

Do not modify MDs while machine is in operation or during active NC program execution.

Cross-reference the PROFIsafe module type (from alarm %1 and %2 parameters) against device documentation or PROFINET GSD file to determine the maximum permissible sub slot count for that module.

Reduce the sub slot number in the identified MD to a value at or below the module's maximum (typically 0-3 for standard safety I/O modules). Verify the corrected value against the PROFIsafe configuration in TIA Portal or Siemens commissioning tool.

Perform a complete NCK reset (Ctrl+Shift+F5 or via HMI menu) and re-initialize the PROFISAFE communication to validate the corrected parameter.

Verify the physical PROFIsafe safety module installed matches the module type declared in MD 32050 or related safety module configuration MDs. Cross-check module model number and firmware revision.

Update the PROFINET device database: In TIA Portal or Siemens Automation Tool, import the latest GSD file for the installed safety module from the manufacturer. Verify the GSD file version is compatible with the NCK firmware version.

Reconfigure the PROFIsafe module slot/sub-slot assignments in the PROFINET topology using the updated GSD and synchronize this configuration back to the SINUMERIK MD parameters via the commissioning interface.

Perform NCK cold restart (power cycle or hard reset) to reload PROFISAFE configuration tables with updated limits.

Create a backup of current MDs via HMI (Diagnostics > Machine Data > Export) to preserve configuration state before correction.

Load factory default MDs for the SINUMERIK 840D system (or last known good backup) and re-apply only customer-specific, non-safety-related customizations to reset PROFIsafe parameters.

Factory reset will remove all custom MDs; use only if backup is unavailable and alarm persists.

If using external MD editing tools (e.g., file-based import), ensure the MD syntax validator in TIA Portal or Siemens commissioning software is executed before transferring MDs to the control.

Perform a full NCK initialization cycle and verify alarm 27207 clears after MD reload.