Siemens Mmc Card Format Tool Jun 2026

Here is the quick-guide to recovering your card:

A Siemens MMC contains a hidden system area and a specific partition structure required by Simatic Manager and TIA Portal. When you format it via Windows: The is rewritten to FAT32 or NTFS. The Special Internal ID is ignored. siemens mmc card format tool

Cons / Limitations

: If you click "Format," Windows overwrites the proprietary hidden partition and registers (CID/CSD) that the Siemens CPU uses to identify the card. Once this happens, the card becomes a "dead" brick to the PLC, even though it works perfectly as a standard 16MB or 32MB card for a computer. Official Methods for "Formatting" (Resetting) Here is the quick-guide to recovering your card: