If you have a Siemens PG (Programming Device) or a compatible external Prommer (e.g., USB Prommer 6ES7792-0AA00-0XA0), you can format the card directly in the software. Insert the MMC into the PG/Prommer.
Remember the three golden rules:
Note: The PLC must be in STOP mode. If you are in RUN mode, TIA Portal will prompt you to switch to STOP mode automatically. Method 3: Using a Prommer (External Card Reader) siemens mmc card format tool
The PLC will reject the card with a flashing or "MAINT" LED. The PLC will continuously request a memory reset (MRES). If you have a Siemens PG (Programming Device)
Clicking "Format" in Windows rewrites the MBR and creates a standard FAT32 partition. USB Prommer 6ES7792-0AA00-0XA0)
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