Siemens S7-300 appendix Backup of project data to a Micro Memory Card MMC, Function principle

Memory concept 4.2 Memory functions

4.2.7Backup of project data to a Micro Memory Card (MMC)

Function principle

Using the Save project to Memory Card and Fetch project from Memory Card functions, you can save all project data to a SIMATIC Micro Memory Card, and retrieve these at a later time. For this operation, the SIMATIC Micro Memory Card can be located in a CPU or in the MMC adapter of a PG or PC.

Project data are compressed before they are saved to a SIMATIC Micro Memory Card, and uncompressed when fetched.

Note

In addition to project data, you may also have to store your user data on the MMC. You should therefore first verify MMC memory space.

A message warns you if the memory capacity on your MMC is insufficient.

The volume of project data to be saved corresponds with the size of the project's archive file.

Note

For technical reasons, you can only transfer the entire contents (user program and project data) using the Save project to memory card action.

CPU 31xC and CPU 31x, Technical data	4-19
Manual, Edition 08/2004, A5E00105475-05