. To regain access to a password-protected CPU, you must perform a factory reset, which permanently deletes the existing program and data Official Recovery Procedures
Third-party tools claim to recover or bypass Level 3 and Level 4 passwords without deleting the stored program. Note that these are not official Siemens tools and should be used with caution. siemens s7 200 smart password unlock link
Stay safe, stay compliant, and keep your automation running smoothly! Official Methods