Maintenance
9.5 Backup of project data to a Micro Memory Card (MMC)
S7-300, CPU 31xC and CPU 31x: Installation
Operating Instructions, Edition 08/2004, A5E00105492-05
9-5
9.5 Backup of project data to a Micro Memory Card (MMC)
Function principles
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 is compressed before it is saved to a SIMATIC Micro Memory Card, and
uncompressed on retrieval.
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.
Handling the functions
How you use the Save project to memory card / Retrieve project from memory card functions
depends on the location of the SIMATIC micro memory card:
• If the micro memory card is inserted in the MMC slot, select a project level that is uniquely
assigned to the CPU from the SIMATIC Manager project window (e.g. CPU, program,
source or blocks). Select the Target system > Save project to memory card or Target
system > Retrieve project from memory card menu command. Now the complete project
data is written to / retrieved from the Micro Memory Card.
• If project data are not available on the currently used programming device (PG/PC), you
can select the source CPU via "Available nodes" window. Select menu command PLC >
Show available nodes to open the "Available nodes" window. Select the connection/CPU
that contains your project data on Micro Memory Card. Now select menu command Fetch
project from Memory Card.
• If the micro memory card is located in the MMC programming device of a PG or PC, open
the "S7 memory card window using the File > S7 Memory Card > Open menu command.
Select the Target system > Save project to memory card or Target system > Retrieve
project from memory card menu command. to open a dialog in which you can select the
source or target project.
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