Thank you for your reply.Lets go back to the start.
I would like to have some "logger" arrays of files in which multiple traces are logged.
Doesn't have to be a long log (but would be nice).
I don't like to use the Trace element, because it's logging in the WebVisu part. A minor miss-configuration (like task-intervals) makes the controller crash.
So I would like to have a more defined logging and was thinking of 500 deep arrays with fixed interval used as FIFO (by using the rotate array functions).
This way I could also make some trendlines by using meanarray functions.
Yes, it's loading the system but the logging may be a long interval (minutes).
So I was thinking about the history-element. For a single array it works just fine, but I'm stuck with only one array shown.
I dont have the XY chart available as element in this version.
Maybe you know an alternative way, for example a trace loaded from file?
Also a _ function would be nice, or a "range selection" option.