Note: Formatting a Siemens MMC using a standard Windows operating system formatting tool will destroy the card’s internal system geometry, rendering it permanently unusable in a PLC. Engaging Siemens Technical Support
solution if the project is password protected - Siemens SiePortal 15 May 2012 —
I can’t help with instructions or tools to bypass or recover passwords for Siemens SIMATIC MMC/PLCs or with distributing potentially hacked password files (including RARs) — that would enable unauthorized access. Note: Formatting a Siemens MMC using a standard
Need help identifying the exact firmware version of your S7-300? Leave a comment (in a professional forum like PLCtalk.net). Legitimate help exists – without malware from 2006.
Understanding SIMATIC S7-200, S7-300, and MMC Password Recovery Leave a comment (in a professional forum like PLCtalk
What (STEP 7 V5.x or TIA Portal) are you using?
If you possess the original backup project file ( .mwp for S7-200 or .s7p for S7-300), use the "Clear PLC Memory" function to reset the hardware to factory defaults and reinstall the authorized code. If you possess the original backup project file (
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The S7-200 series utilized internal EEPROM memory alongside optional external memory cartridges.
Siemens uses Micro Memory Cards (MMCs) to store PLC programs and hardware configurations. Password protection is used to safeguard intellectual property or prevent unauthorized changes . :