I am trying to use system.dnp.demandpoll function but is showing error when I enter variable. With direct string format it works like directly in double qoutes.
Tag (Memory-String) that I am reading:
This is script on button action
The error message
Need help!
Check the docs for the return type of system.tag.readBlocking(). Your device_1 is not a string. The string you think you are getting is nested two levels deeper.
Ok so I wrote these two line for saving the output on a label and it is a string
but when I send this variable to dnp function it gives same error
Don't ever use Perspective display components to try to determine a type; we worked extremely hard to make it so you could throw complex values into props and we would make a best-guess effort to display what you might be looking for.
Try this: self.getSibling("Label").props.text = str(type(device_1))
Anyway, I'm betting your "type" is a QualifiedValue, but I am a bit surprised if that's the case and the .dnp function isn't able to use it as a string. If you are seeing QualifiedValue, do readBlocking(...)[0].value
You shouldn't be. Perspective is (almost) the only place in Ignition where you can drop a QV and have it automagically use the inner value.
Perspective is (almost) the only place in Ignition I live.
[0].value worked!
Hah.
I'd like to chastise whoever made the [series of unkind adjectives] decision to wrap everything in Perspective in QVs. Sigh.
Fixed for 8.3, perhaps?
/runs away
Run far. Run fast.
