4/7/2021 9:19 PM | |
Joined: 9/27/2006 Last visit: 8/23/2024 Posts: 12279 Rating:
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Hello Nacef; The work memory of Siemens S7-300 and S7-400 PLCs is integrated in the CPU, and cannot be modified through a memory card. Look at the technical data of the CPU you ware working with to find out how much work memory (in bytes) is available to you. On the other hand, load memory for the S7-300/400 CPUs is based on the memory card size. These documents will inform you on the size of available memory cards for each CPU family (and their part number): - Which memory cards can you use with an S7-300 CPU? https://support.industry.siemens.com/cs/ww/en/view/19102565 - Which memory cards can you use with a S7-400 CPU? https://support.industry.siemens.com/cs/ww/en/view/73159687 Note that for the S7-300 the older CPUs required a MC card, the newer models use a MMC as load memory. Check your CPU part number in the S7-300 document above. Wizard's excellent suggestion was to open the Memory tab in your CPU properties (in Step 7) to see how much work memory is used in your project. Then multiply this value by 1,5 (as a rule of thumb) and locate the closest available memory card size (in bytes) you would need to download and run your project in the CPU. Hope this helps, Daniel Chartier |
Last edited by: dchartier at: 04/07/2021 21:34:00Last edited by: dchartier at: 04/08/2021 01:35:22 |
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