S7-200 Smart Password Unlock !!top!! ❲2025-2027❳

Used to hide the logic within subroutines. To remove it, you must select the block, go to Edit >> Know-how protection , and enter the original password. Default Passwords:

Once you regain access, implement these best practices: s7-200 smart password unlock

This is the only Siemens-supported method for recovering a PLC with a lost password. It results in the complete erasure of the user program. Used to hide the logic within subroutines

Several commercial tools exist (e.g., UnlockS7200SMART , SMARTPwdRemover ). The general workflow is: you must select the block

: Use an Ethernet cable (for SMART models) and establish communication in the software.