If you work with Siemens SIMATIC S7-300 or S7-400 PLCs, you’ve likely encountered the proprietary Siemens Micro Memory Card (MMC). These cards use a specialized FAT format that Windows cannot natively read. If you try to open one in a standard card reader, Windows will often prompt you to format it—, as it will erase your PLC program and hardware configuration.
Ensure "Copy entire raw image file" is selected to capture all sectors. 3. Unlocking the Image Run the Unlocker Unlock_and_converter_MMC_Image_S7.exe Load the File : Click the button and select the file you created. Retrieve Password unlock-and-converter-mmc-image-s7 download