Can referenced models use frame-based processing?

Question

Paul Nelson 2012-9-25

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https://ww2.mathworks.cn/matlabcentral/answers/48988-can-referenced-models-use-frame-based-processing

I'd like to create one sub-system (filter) that is copied to several channels, and only need to edit one filter. The most straightforward way that I see to do this is create a model, then reference it using the model block. I'm doing signal processing with frame-based signals. When I don't reference a model (a digital filter) the block diagram works fine. When the model is referenced via a model block, however, I get an error indicating that a block is expecting a sample based signal.

Do model blocks support frame-based processing? Or do I need to use buffer/unbuffer stages? If so, does buffering/unbuffering slow down my simulation substantially? Any guidance would be appreciated!

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Answer 1

Ryan G 2012-9-25

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https://ww2.mathworks.cn/matlabcentral/answers/48988-can-referenced-models-use-frame-based-processing#answer_59920

I tried this and had no issues, but I think the workflow is causing a hangup for you.

Try this:

1) Create the 'model' as a subsystem inside the main mdl file. Do not use the model block directly.

2) Make the subsystem atomic with -1 sample time. (do this in block parameters)

3) Right-click convert to model block.

This process will create a model block that carries over the parameters, sizes etc of the original model. It will keep thinks simpler, in my opinion. If you want to continue your workflow I believe you need to set the inports and outports of the model file that is being referenced to be frame-based instead of sample based.