Question: How often can I write updates to files on my PLC (e.g. XML / CSV) before it wears out?
I have a X20CP1686X and found this in on the B&R website:
This is my file device configuration:
Are my files stored on the eMCC flash memory, and thus is the 20.000 write cycles the value I am looking for?
Hello,
I don’t think it’s easy to calculate how often you can write a file to memory. It depends on many factors. You can run tests under real end-customer conditions and check Storage health data.
If you ask AI for the “Guaranteed erase/write cycles” parameter for eMMC flash memory, you get something like:
“Rewriting a file 20,000 times does not mean your eMMC is damaged.
The endurance rating applies per erase block, and thanks to wear-leveling, the actual wear is distributed across many blocks.”
You could make some kind of an estimate based on the “Writable data amount, Guaranteed 40 TB”. So if you write for example ~22 Gigabytes every day, that should last around 5 years. (40000 / 22 = 1818,2 / 365 = 4,98).
