Dear community,
yet again I am troubling you with basic questions; unfortuntely the help document and the net search could not solve them.
Currently I am trying to set up a simple subtraction with advanced tags:
I subtract the current value minus the value from the memory tag into the derived tag (I run the expression every 5 minutes)
then I update the memory tag value to the current value tag using a link tag (every 5 min and 5 seconds)
Sometimes my calculation works but other times the memory tag is updated before the derived tag is executed; the executed tag is sometimes 10 seconds late.
Why is that? Can I set the order in which the tags are executed? I do not want to use a bigger time offset.
I could use the data logger but it just doesn't seem right to me that it doesnt the execute the tags at their specific time.
Thanks in advance.
Kind regards,
Kepware User
