If you want to clear the program but keep the card's integrity: siemens mmc card - Support
Instead of a third-party "format tool," use the following built-in methods provided by Siemens software and hardware: 1. Hardware Reset via CPU ( Go to product viewer dialog for this item.
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 siemens mmc card format tool
For newer controllers, the TIA Portal Engineering Software provides a dedicated tool: Go to for the connected CPU. Expand the Functions folder in the project tree. Select Format memory card and click the Format button.
Managing Siemens Micro Memory Cards (MMC) requires specific procedures because these are not standard flash drives. While they may physically resemble standard SD cards, they use a proprietary formatting system essential for SIMATIC S7-300 Go to product viewer dialog for this item. Go to product viewer dialog for this item. controllers. The Golden Rule: Never Format in Windows If you want to clear the program but
The STOP LED will blink while the MMC is being "reset" to its factory-delivered state. 2. TIA Portal "Format Memory Card" ( Go to product viewer dialog for this item.
Release the switch and immediately (within 3 seconds) flip it back to . A standard PC card reader can often read
Hold the switch to the position for roughly 9 seconds until the STOP LED lights up continuously.