In Ignition 7.9 I could create a string parameter on a UDT and pass it the address of a tag then use that in an expression.
Then
And the expression evaluates correctly.
This doesn't work in 8.1. It doesn't seam to evaluate the parameter in the same way.
Is there a different way in 8.1 to pass a tag to a UDT for use in an expression?
Your source is a string. If you want to read the value of it, you need to run it through the tag() function.
e.g.
getBit(tag({Source}), {Offset})
It looks like you might want a derived tag though instead of an expression tag
That's what I needed. Just had to remove the braces {} and [~]. Thanks.
This is old code so predated derived tags. I'll look into it as I upgrade.
