Siemens Mmc Card Format Tool [verified] Page

Use a dedicated third-party tool or a hardware reset.

If the card is recognized by the PG/PC interface, you can format it via the "SIMATIC Manager." siemens mmc card format tool

This is the safest method for active projects. You can format the card while it is inserted into the PLC. Connect to the PLC using the TIA Portal. Go to for the connected CPU. Select Format memory card from the Functions menu. Use a dedicated third-party tool or a hardware reset

A: Approximately 2–5 minutes for a 128MB MMC. If it takes more than 10 minutes, the card is likely physically damaged (worn out NAND cells). Siemens MMCs are rated for ~100,000 write cycles. siemens mmc card format tool

Because Siemens official Prommers cost $500–$1000, many users turn to third-party tools. Here is an honest assessment.