Select the checkbox if you want to clear network settings.
Resetting an S7-1500 CPU to factory settings (S7-1500) - ID: 109747174
or a PC with a standard SD card reader (Note: formatting the card with Windows can corrupt it; use Siemens Card Reader software or TIA Portal to "Format" the card). Deleting the SIMATIC.S7S folder from the card. Important Constraints Know-How Protection
No, resetting to factory settings does not delete the firmware. The firmware is stored in a protected area. However, if you have a particularly stubborn password lock or corrupt data, performing a firmware update using an empty memory card is another very effective method to wipe the device clean.
A factory reset will permanently delete the PLC program, data blocks, and hardware configuration. Ensure you have a backup of the project file before proceeding. Resetting to factory settings - TIA Portal
Resetting the password on your Siemens S7-1500 requires careful attention to the steps outlined above. By following this guide, you should be able to regain access to your PLC and continue with your automation project. If you encounter any issues or have further questions, don't hesitate to reach out to Siemens support or consult the relevant documentation.