I want to bind a parameter from the return of a python script. But my script does not get evaluated, as you can see, I put "1" on expression and use a script transform - I used to do this but just found that this is bad strategy. How can I get the script evaluated, when each parameters used on the…

Transforms are only evaluated if their parent is re-evaluated. A static expression value like 1 is only evaluated once at first load. You need to use an expression structure binding and bind to all of your props you want to monitor for this to evaluate when these props change I think You can also i…

That is what I observed. Thanks. Time to practice expression structure. I watched it a few times but didn't learn it.

You could use asList() in an expression binding to produce a composite of several "monitored" tags/properties to pass to your transform as value. Something like this: asList({path.to.prop1}, {path.to.prop2}, {path/to/tag1}, {path/to/tag2}) if you do this, I recommend exploding back to local varia…

Hi, I am playing with expression structure now.. On expression Editor. I added tags. But how do you make the tags dynamic such as below: I want to make the motor index number to be dynamic: [image] Is that even possible?

That would be an indirect tag binding. Putting curly braces into a string doesn't create a binding. Click on the chain link icon in the left gutter next to the property to open the binding editor. { And consider going through Inductive University, so you get all of these basics at a steady pace. …

I see. but there is no indirect binding in this option only expression binding.. I made a work around by doing this on a custom parameter, where I can use Indirect Binding.

[image] pturmel: You could use asList() in an expression binding to produce a composite of several "monitored" tags/properties to pass to your transform as value. Most likely I am looking at the wrong spot, but I cannot find asList() in the funtions on the Edit Binding popup.

That’s because the asList() expression function is part of @pturmel ‘a free SimulationAids Module. [image] Automation Professionals' Integration Toolkit Module 3rd Party Modules Automation Professionals is pleased to announce the immediately availability of a major upgrade…

[image] Louis Rose: That’s because the asList() expression function is part of @pturmel ‘a free SimulationAids Module. I see, is there any native way to accomplish similar thing? I dont opose to use the SimulationAids module, but would need to consult with customers if they apporve.

No there isn’t a native way to do that in the expression language. I suppose that you could use runScript to accomplish something similar, but that isn’t really a pure expression.

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