The program cannot be read, copied, or modified. You can only monitor PLC execution.
When maintaining an older machine without a backup file, wiping the PLC is not an option. Engineers often explore alternative recovery paths. 1. Extracting the Password via EEPROM Readers Siemens S7-200 Password Unlock
There are three main official ways to regain access to a locked S7-200 CPU: The program cannot be read, copied, or modified
Allows reading and uploading the program. Requires a password to download changes or modify data blocks. The program cannot be read