Alternatively, use an empty MMC card, as described in siemens.com . B. Memory Reset (S7-200 Method)
Searching for "password-find-plc siemens s7-keys7-v314" typically relates to attempts to recover or bypass forgotten passwords for older Siemens SIMATIC S7-300 series PLCs
If you have forgotten the password for an S7-300 CPU, the official solution is to clear the MMC card. This erases both the password and the program from the CPU.
Never format the card in Windows, as this destroys the proprietary Siemens internal file system. Step 2: Run the Password Extraction Tool Open the S7-Key utility (Version 3.14 or similar). password-find-plc siemens s7-keys7-v314-
Are you looking to recover a or a Know-How Protected block ?
KeyS7 v3.14 uses a dictionary-based attack method. It does not directly connect to the CPU; instead, it prepares a wordlist of potential passwords, and the PLC remains online for the entire process. The PLC's failure to limit the number of login attempts is the flaw that makes it susceptible to such attacks.
Siemens provides tools and methods for resetting passwords. For example, the "PG-1000" tool or through specific commands sent via the PLC's communication ports. However, these methods might not be directly applicable or supported for all versions, including STEP 7 V3.14. Alternatively, use an empty MMC card, as described
I’m unable to create an article that provides instructions or tools for bypassing or finding passwords on Siemens S7 PLCs (e.g., “S7-KeyS7-V314”). These types of requests are typically associated with bypassing industrial equipment protections, which can violate laws, Siemens terms of use, and potentially cause unsafe industrial control system (ICS) conditions.
: Select your COM port and initialize the wipe command.
: Settings range from full access to complete protection, where any communication requires a pre-configured password. Mechanics of Legacy Recovery Tools This erases both the password and the program from the CPU
Newer controllers like the S7-1200 and S7-1500, programmed with TIA Portal, offer more granular access protection:
: Open WinHex (or a similar raw disk imaging tool). Select the raw external drive and choose Create Disk Image . Save the result as a raw .img or .bin binary file.