What if you don't have a card reader? You can format the card while it is inserted in the PLC, provided the CPU is healthy enough to communicate.
If you accidentally formatted your card in Windows and the PLC won't recognize it, follow these steps: siemens mmc card format tool
Standard operating system formatting (FAT32, NTFS) will a Siemens MMC, making it unusable in a PLC environment. A standard PC card reader can often read the data, but attempting to "Format" via Windows Explorer destroys the hidden system image Siemens uses to identify the card to the CPU. Authorized Methods to Format or Reset a Siemens MMC What if you don't have a card reader
The most "official" way to format a card is through the Siemens programming software itself. NTFS) will a Siemens MMC
