6/5/2020 2:53 PM | |
Joined: 4/2/2019 Last visit: 11/10/2021 Posts: 16 Rating: (0) |
can we load a program from the PLC knowing that the program is being executed in the process |
6/5/2020 4:52 PM | |
Joined: 9/27/2006 Last visit: 9/24/2024 Posts: 12282 Rating: (2685)
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Hello Moussa; Depending on how old your S7-300 CPU is, it comes with different memory accessories: support battery, MMC... But whatever the components used in your CPU, the memory concept remains the same: there are separate memory areas on the CPU, Work memory, where the program runs, and Load memory, when you can download the program. And also upload it. Since the Load memory (battery-supported RAM or MMC flash EPROM) is not active while the program is functioning, you can download and upload your program to the PLC without affecting it. We would do it all the time in our project commissioning phase. See the description of the S7-300 memory structure in the following document: How can you obtain an overview of the memory concept of SIMATIC S7-300 CPUs and C7 devices? https://support.industry.siemens.com/cs/ww/en/view/7302326 Hope this helps, Daniel Chartier |
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