Do format a Siemens MMC using the standard Windows "Format" command in File Explorer. This action removes the proprietary Siemens header, and there is no official way to recover it once it is gone. 1. Using TIA Portal (Preferred Method)
If you insert a Siemens MMC into a standard Windows card reader, Windows will report that the card is unformatted or corrupted and prompt you to format it. siemens mmc card format tool
Click . The tool will bypass the Windows file system and write the raw sector data directly to the card. Do format a Siemens MMC using the standard
The Siemens MMC Card Format Tool is a lightweight, standalone utility provided (unofficially but widely supported) by Siemens to restore MMC cards to a factory-ready state. It is different from the "Transfer" tool inside STEP 7 software. Using TIA Portal (Preferred Method) If you insert
: Can potentially save $100–$500 by reviving a "dead" card.
If your card fails to format after three attempts, do not waste further production time. Dispose of the card (Siemens has no user-replaceable wear leveling) and procure a genuine Siemens replacement from your distributor.
: Allows mass formatting of cards across multiple CPUs on a network without opening a full TIA Portal project. Siemens MMC Formatter Tool (Third-Party/Legacy) :