MATLAB: What is the order of reference models in Simulink

algebraic loopcompilereference modelssequencingsimulink

I have a Simulink "top" model which contains several reference models. Reference models have I/O interaction. How can I get the order of which these refernce models are "sequenced" by Simukink? This helps as part of my effort to resolve some algebraic loop issue.

Best Answer

Please use the below script to generate Execution Order...

https://in.mathworks.com/matlabcentral/fileexchange/70642-generating-sorted-execution-order-order-of-execution

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MATLAB: Check referenced models do exist

You can do this.

MdlRef=find_system(Model,'BlockType','ModelReference');
for k=1:length(MdlRef)
SubModel=get_param(MdlRef{k},'ModelFile');
if ~exist(SubModel,'file')
error([SubModel,' does not exist'])
end
end

To make this work for nested model reference, you need to make the above code a recursive function.

Keep in mind, the only way to find what's inside a model is to load or open the model. In the nested situation, if 'sub_mod1.slx' does not even exist, there is no way to know how many model references exist in 'sub_moe1'.

MATLAB: How to change the number of Input / output ports of a referenced subsystem in simulink

Hi Tamim,

As far as I can tell, the issue is that you're trying to modify the I/O for one of the variants in a variant subsystem. That means each variant in that subsystem must use a subset of the signals from the parent. For example, if the variant subsystem has inputs A, B and C, then each of the variants must use only those signals. If you want to add a 4th input (D), then you've created an incompatible variant. This is what your error message is telling you.

You have 2 options:

Update the variant subsystem to include the new signals you want in your individual variant. This will require you updating the model level above this to feed in the new signal.
Get rid of the variant subsystem and just put in a new subsystem like Ashish recommended. Think of it like hard coding your subsystem I/O. It's simpler, but more rigid in its design.

For more info on variant subsystems, check out this example.

Cheers,

Mike

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MATLAB: Check referenced models do exist

MATLAB: How to change the number of Input / output ports of a referenced subsystem in simulink

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