How to back up S7-318 to flash card

Hello Wolfepak;

The S7-318 is actually a Sa7-400 CPU designed in a S7-300 format. So the following information for a S7-400 is adequate.

Look at the 2 following FAQs:

How can you back up the actual values of DBs and markers?

https://support.industry.siemens.com/cs/fr/en/view/18778977

How can you write the program to the FLASH Memory Card when using a SIMATIC S7-400 CPU?

https://support.industry.siemens.com/cs/fr/en/view/23670531

I suggest you save the actual values of your DBs back to the offline folder of Step 7 before you write the program to the FLASH card, that way when you read back the program from the memory card (after a power dwn) thaose values will be set to start your production once more.

Note that writing the program to the FLASH card reqires the CPU to be stopped, so you must plan the windows when it is available for such an operation.

Eventually, if those actual values change rather often you might want to do the procedure on a regular basis, so the startup values are  as close to real situations as possible...

Hope this helps,

Daniel Chartier