Unlocking an S7-200 typically involves the software.
: For situations where software communication is blocked, the utility Wipeout.exe (found on the original installation CD) can reset the CPU to factory defaults, including its baud rate and network address. SIMATIC S7-300
: If the program content is not needed, the CPU and MMC can be manually reset using the MRES (Memory Reset) switch procedure, which wipes all data and security settings. Key Considerations
: Once an image is created, specialized tools (often referenced as S7ImgRd or Unlock_and_converter_MMC_Image_S7.exe ) scan the hexadecimal data to locate and display the plain-text password.