S7 Mmc

Decrypt blocks FC and FB Siemens

hi all, I would like to decrypt a block prorgama siemens. it has told me that is posible to do it reading the mmc. anyone know how to do?
Thanks
abdetaouab.chbabou @ gmail.com
 
hi all, I would like to decrypt a block prorgama siemens. it has told me that is posible to do it reading the mmc. anyone know how to do?
Thanks
abdetaouab.chbabou @ gmail.com
 
Hii all, just to share information how to restore accidentally FAT formatted siemens Simatic S7 MMC. If you can't do that use winhex (winhex asked for licence everytime I try to clone the MMC) or S7imgwr (nothing happened after I run it), you can try http://hddguru.com/software/HDD-Raw-Copy-Tool/HDDRawCopy1.10Portable.exe. I just tried it and It worked well. Now my 128K MMC is back to normal. thanks to HDDguru.
 
Hi every body,

last two weeks I was working on understanding what are S7-31x MMCs. In the end I collected following information
:

64KB-4MB SIEMENS MMC cards are standard 16MB MMCs with special SIEMENS format. Datasheet at http://www.tischer.cz/HB28D032MM2-RENESAS.pdf.

8MB SIEMENS MMCs are the same but 32MB MMCs.

You can make bit copy of these MMCs by using tools at http://personal.telefonica.terra.es/web/suwe in standard MMC/SD card reader. By using this tools you also copy the special SIEMENS format.

But in case you would like to use non SIEMENS 16MB or 32MB MMC, you cant use it in S7 as every MMC has private CID and CSD register where are stored informacion as OEM/APPLICATION ID, PRODUCT NAME, .... . The example of SIEMENS 64KB MMC is at http://www.tischer.cz/64kb.txt. CID is OTP register and first 14 bytes of CSD are programed only by manufacturer. S7 checks and compares stored info. from CID and CSD.

If you have SIEMENS MMC accidentaly formated in standard MMC/SD card reader/writer (for example as FAT format) you can repair it in this standard MMC/SD reader/writer.
1. read original SIEMENS MMC by S7imgrd (the same size as failed card)
2. write this image to failed MMC by S7imgwr

When I was analyzing MMCs I also find out how is the password stored at the MMC.

If you have any question, email me at [email protected]

Hi Mr TISCHER, I am KY, from 34 VIET NAM, all your support is very useful for ME. Thanks very much. I have problem with Siemens SD card 64kb formated FAT, but I follow your instruction and your data image then i fixed. thanks very much.
Pham Xuan Ky.
 

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