9/8/2022 1:23 AM | |
Joined: 10/7/2005 Last visit: 9/18/2024 Posts: 3021 Rating: (1054)
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Hi ZumoPLCero the simple answer is that you need to have enough free work memory to cater for a download of the largest block that you want to download. What happens (at least with S5's and S7-300's & 400's) is that the whole block gets downloaded into a free area of the work memory. Once there, the OS will activate usage of the new Block in between program scans and mark the old block as invalid (which is then removed - at least when you explicitly compress - and its occupied work memory made available again) |
Cheers |
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This contribution was helpful to1 thankful Users |
9/8/2022 6:15 AM | |
Joined: 7/26/2008 Last visit: 9/18/2024 Posts: 100 Rating: (19) |
Hi ZumoPLCero, did you allow the compression and was there any improvement in the available work memory? |
9/8/2022 7:34 AM | |
Joined: 4/4/2019 Last visit: 7/11/2024 Posts: 59 Rating: (2) |
No. Im still learning about programming and Im not sure about compression..it's a risky process? It stops the PLC? |
9/12/2022 5:34 AM | |
Joined: 7/26/2008 Last visit: 9/18/2024 Posts: 100 Rating: (19) |
Hi ZumoPLCero, compression is just reclaiming unused space. I have done it often without issues and no PLC stop. |
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