: Never format the MMC when Windows prompts you to. This destroys the proprietary Siemens internal structure.
| Error Message on CPU | Possible Cause | Solution | |------|------|------| | "MMC is not a valid Siemens MMC" | Corrupt boot sector | Use Card Utility to completely reformat before restoring | | "Defective MMC" | Physical sector failure | Card is beyond repair. Replace with new Siemens MMC | | "FW Update required" | MMC has older firmware than CPU | Download CPU firmware from Siemens and update via STEP 7 | siemens mmc image file download
A physical card (e.g., 16MB) might be partitioned to act as a 64KB card. Writing a 64KB image to a larger physical card is possible, but you cannot spoof a higher capacity than what the card's internal ID allows. Where to Find Image Files : Never format the MMC when Windows prompts you to
: Images created with WinHex are not compatible with S7ImgWR and vice versa. Replace with new Siemens MMC | | "FW