Hi. I have a problem with function f(x) trend view. I did everything like in the example https://support.industry.siemens.com/cs/ww/en/view/109481693

I converted the given code into my data, I only changed that the data is read and written to USB and i had to comment on the function closing the logs: "Do while smarttags (" LogsAreClosed ") = False Loop "..

Now the graph is showing, but I have to press the function call button multiple times for the graph to draw. If I press it once, the old graph remains or nothing appears. Do you have any advice or solutions to this problem?

Hi FilipKlajn,

I think this is because if you are reading data from archived files from a USB or SD card, the trend data is not refresehed continuously, it is only refresehed when you open the trend, unlike when you read a variable directly from the PLC/HMI which is refreshed in real time.