Siemens Mmc Card Format Tool -

Insert the MMC into the dedicated Simatic Card slot on your PG or USB Prommer. Open or TIA Portal .

Hold the switch to the position for roughly 9 seconds until the STOP LED lights up continuously.

Acquire a raw sector image ( .img ) that precisely matches your card's product code (e.g., 6ES7953-8LG11-0AA0 ). siemens mmc card format tool

The card is full, and you need to clear all data blocks (DBs) and the program.

Release the switch and immediately (within 3 seconds) flip it back to . Insert the MMC into the dedicated Simatic Card

Standard operating systems (Windows, macOS, Linux) do not recognize the internal structure of a Siemens MMC.

: Ensure you are using original Siemens parts , as generic SD/MMC cards lack the required internal controller logic. Acquire a raw sector image (

If a Siemens MMC was formatted using standard Windows tools, STEP 7 will no longer recognize it. In this emergency scenario, third-party software can write a raw binary factory image (.img file) back onto the card to revive it. Unlocker and S7ImgRD / S7ImgWR