1/9/2014 2:50 PM | |
Joined: 4/22/2010 Last visit: 5/3/2024 Posts: 5697 Rating:
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Hello, Lets take away some doubts by the result off a test i have done: 1 in case of Eprom and download to CPU only, program is stored in (load) Ram. 2 When downloaded to Eprom, Ram is cleared. 3 when changes are made and downloaded to cpu only changed blocks are stored in Ram. 4 when powercycle the CPU without battery, Ram is cleared and program is loaded from Eprom. 5 when changes are downloaded to Eprom Ram is cleared again. My conclusion is: your (load) ram is full because you did not download to memory card. In your Ram are only the changed blocks stored. If you download userprogram to card your Ram has again space to store and test your new functions. See attachment for the testing results. Regards, Marcjan AttachmentS7_400_memorytest.pdf (743 Downloads) |
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1/7/2015 9:28 PM | |
Joined: 1/28/2009 Last visit: 8/5/2024 Posts: 6844 Rating:
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Hello, The procedure is explained in page #32 of the following manual.The point is, when you remove the external memory card, CPU requests a memory reset that delete the all RAMs in work and load memory.It means , you should re-load your program. Automation System S7-400 CPU Specifications Page #27, has more for consequences of memory reset. I hope this helps, Hamid Hosseini |
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