: In TIA Portal, if you still have the original project file, you can go to "Online & Diagnostics" and select "Specify password to protection" then "Delete" .
Modern firmware distinguishes between "Read Access," "Write Access," and "Full Protection," requiring different keys for different tiers of interaction. The Mechanics of "Unlocking" plc+hmi+password+unlock+v42+2021
If you have forgotten a password for a device you own, official channels are the safest route: : In TIA Portal, if you still have