Good news , some times the simplist idea are working the best...
So the preset size of the buffer is really too small... 
I will try this tomorrow morning !
Thanks a lot...
Now I have the licences RPi and HVAC working on a dongle so I can test without having my runtime stopping after 30 min...
I will check the options and macros, thanks for the indications.

Pierre RUWET 

Le 9 oct. 2020 à 19:44, Morberis <forge@codesys.com> a écrit :



Your buffer needs to be bigger. I just made it 20000 instead of 2000 for both and it worked fine. So you'll need to play around with that.


AC Datalog on a RPi 3 buffer trouble


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