to drag-and-drop, delete, or explore files on a Siemens MMC.
exist to attempt restoration using a "card image" (.S7img), these are not supported by Siemens and often fail. Siemens SiePortal Format MMC - Siemens SiePortal - Support
If you're an automation engineer who has ever worked with Siemens S7 PLCs, you've likely encountered the issue of a corrupted or unintentionally formatted MMC card. The Siemens MMC card format tool is not one official program but a collection of essential software utilities designed to read, write, format, and repair these specialized memory cards. This comprehensive guide will walk you through everything you need to know about these tools, the risks of improper formatting, and step-by-step recovery methods.
The exact printed on your card (e.g., 6ES7...). siemens mmc card format tool
Related search suggestions I’m going to provide a few related search-term suggestions to help you find downloads, manuals, or troubleshooting threads.
Remember the three golden rules:
Older multi-in-1 USB 2.0 card readers that explicitly list "MMC" support (not just SD/MMC combo support) are often required. Modern USB 3.0/4.0 card readers usually fail to communicate with Siemens cards at a raw register level. to drag-and-drop, delete, or explore files on a Siemens MMC
The card is now "empty" from a PLC perspective. It has no operating system or user program. If you insert this into a PLC, the CPU will likely show "No program" or request a firmware update (depending on the CPU model).
Disclaimer: These utilities are third-party freeware tools and are not officially supported by Siemens. Requirements:
The most popular freeware utility ecosystem developed by the automation community includes (S7 Image Read) and S7ImgWR (S7 Image Write). The Siemens MMC card format tool is not
The safest way to clear a Siemens MMC is through official engineering software. This requires an official Siemens field utility device (Field PG) or a specialized Siemens USB Prommer. Steps for STEP 7 Classic: Insert the MMC into your PG or USB Prommer slot. Open . →right arrow S7 Memory Card →right arrow Open . Select all blocks on the card. Right-click and choose Delete (or use the Delete key). Steps for TIA Portal: Open your project in TIA Portal . Expand the Project Tree on the left. Locate and expand Card Reader/USB memory . Select your specific Siemens card reader slot. Right-click the MMC and select Format . Method 2: The PLC Hardware Slot Method (No Software Needed)
Browse and select a clean image file ( .img ) corresponding exactly to your card's size (e.g., a 64KB image for a 64KB card, 512KB for a 512KB card).
The Definitive Guide to Siemens MMC Card Formatting Tools and Methods
Do not attempt to "fix" it using Windows Disk Management.