: Power on the PLC again. It is now in its factory default state and unlocked, allowing you to download a new program. Summary Table: Password Recovery Requirements SIMATIC Memory Card Complete Wipe / Factory Reset Official Siemens Memory Card TIA Portal Reset Reset Protection (if not yet loaded) Original TIA Portal project file "Clear PLC" (S7-200 only) Memory Clear Standard for S7-200 series only Reset to factory settings - remove password - SiePortal
: Insert a Siemens memory card into your PC. Open the TIA Portal, navigate to the card, and change its mode to "Transfer" . s71200 password unlock work
, navigate to the card reader folder and set the card type to "Transfer" : Power on the PLC again