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Siemens AG
Entry type: FAQ Entry ID: 21829579, Entry date: 03/05/2010
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Which devices can you use to read from, write to or delete from an S7-300 MMC (Micro Memory Card) outside the CPU?

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Device note
The SIMATIC Micro Memory Cards (MMCs) of the S7-300 may be read or written only by the following devices outside the CPU:

  • SIMATIC Field PG
  • SIMATIC Power PG
  • USB prommer (order number 6ES7792-0AA00-0XA0).

Using these devices, you can open an MMC in the SIMATIC Manager for reading or writing or for deleting the content.


Fig. 01

Note
Do not use the MMC for non-SIMATIC purposes and do not format it with a third-party device. This would possibly overwrite the internal structure of the MMC that cannot be restored. In this case, the MMC is no longer recognized/accepted in a SIMATIC S7-300 CPU and can no longer be used with SIMATIC devices.

More information on handling the MMC is available in the manual "S7-300, CPU 31xC and CPU 31x: Installation Instructions" in Entry ID 13008499.

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