Siemens S7 300 Password Unlock Exclusive Hot! -

: Incorrectly writing to or imaging a Siemens MMC can permanently damage the card, which uses a proprietary format that is easily broken by standard PC tools.

Older STEP 7 blocks can be unlocked by opening the program source files, finding the KNOW_HOW_PROTECT keyword, removing it, and recompiling the block. If the source file is missing, hex-editing the compiled database ( SUBBLK.DBF ) inside the STEP 7 project directory can flip the protection bits from 0x01 to 0x00 . siemens s7 300 password unlock exclusive