S7-1200 Password Unlock Today

Power on the CPU. The CPU will automatically transfer the "empty" state from the card to its internal memory, wiping the protected project and password.

If you can still communicate with the PLC (e.g., if only certain blocks are protected but you have enough access to go online), you can use the software tools within Siemens TIA Portal. SIEMENS S7-1200: Unlock PLC with forgotten password S7-1200 Password Unlock

Wait for the maintenance or RUN/STOP LEDs to finish flashing (usually the RUN/STOP LED will blink or stay solid STOP). Power on the CPU