Python API update create statement with assembly

Python Programming
1

I am using a PythonProcessHandler to update a create statement in the process.
It needs to create different products depending on some input parameter.
I do not want to use long if statements in the UI, as I have many products and new ones are added regularly.

I got to here:

  createStatement = routine.getStatement(4)
  createStatement.ProductType = newType

For assemblies, this creates “full” assembles.
But I need to have a partial assembly, as in the next step, a robot is placing the parts using a GetAssembly-> TransportIn sequence.

I can get the AssemblySteps

  steps = createStatement.AssemblySteps

But this attribute is read-only.
How to set the assembly steps programatically?

2

You can alternatively set the DefaultProductType of certain slots to none:

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That way they will not be there when the assembly is created. Use the filter function to make sure they only take the correct product. Hope this helps.

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3

Thanks for the input @cassian35 , but this just creates another problem, that I had send to the VC support.
If I assemble an assembly, it does not get disabled anymore.
So, if I proceed as you propose, I create an assembly with no DefaultProductType at the upper level.
I fill it up with a GetAssembly->TransportIn sequence but then I do not get it disassemblied anymore…

So no, not a working workaround.

4

Hey @gg-sps!

Disassembly should not be a problem either way.:thinking: But if you contacted VC Support, it’s better to let them figure this out.

5

My issue with the disassembly of previously assembled units is still not resolved, VC support could at least replicate it - but I finally got the missing code snippet. Hopefully this will be helpful for someone else in the future.
So, to define the included assembly steps in a createStatement:
First, get assembly information:

  productTypeManager = sim.ProcessController.ProductTypeManager 
  newAssemblyType = productTypeManager.findProductType("assembly_name")
  assemblySteps = newAssemblyType.AssemblySteps

Then apply to the create Statement:

  createStatement = routine.getStatement(4)
  createStatement.ProductType = newType
  createStatement.AssemblySteps = [assemblySteps[0]] #Only first step
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