Lifespan of an Ewon Flexy when logging a lot of tags in the historical data logging

Ewon Support Ewon Flexy
#1

Hi,

Our company is currently using at least 1 Ewon per customer site. We start installing a “self- made” dashboard on the Ewon Flexy device.

We are pulling data from 1 plc S7-1200 / S7-1500.
We are already reaching the max tag count values of 1500 tags per Topic.
Among these tags, we probably log 1000 to 1200 of them at every changes as they represent alarms and events occuring on site and we don’t want to miss any of them.

With all this logging going on in the historical data log, we are wondering if it could shorten the lifespan of any component of the Ewon Flexy or even the lifespan of the Ewon Flexy itself.

We would appreciate if we could get an accurate idea of what we can do and what we should avoid to do with the Ewon.

Thanks,
Ktmachinex

#2

The lifetime of flash memory is usually dependent on the number of writes. Although I doubt you are going to wear it out, how many times per day are the tags updated?

#4

I’ll have to collect some data before answering this question. It varies accordingly to the size of the site of our clients. I’ll try to get you a number per the size of the sites.

#5

Ok So I’ve collected for 6 months of data and the average per day that the tags are updated is around 1000 to 1500.

Is it too many times?

#6

I will have to check to make sure, but I know the NAND chip should be able to handle at least 100,000 writes and there is a buffer/memory manager that minimizes them, so just because you update the tag doesn’t mean the actual cell was erased/written to. Let me see what I can find out!

#7

Hi Keven,

I checked with the product specialists and they recommended making sure you are using version 14.0 or higher of the firmware to take advantage of improved the flash management. As long as you are using the latest firmware, there should not be a problem with this set up.

Kyle