Warnings for Non-existent Ports in a Matlab Function Block

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Niel 2014-4-1

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https://ww2.mathworks.cn/matlabcentral/answers/123996-warnings-for-non-existent-ports-in-a-matlab-function-block

评论： Niel 2014-4-1

采纳的回答： Niklas Nylén

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Hi all

I have a rather large model in Simulink. When it runs, it gives me a number of warnings similar to the following one:

Warning: Block 'SS_SplitSimulink_Model1/MATLAB I1/ SFunction ' output 'Inf'
for element 23 of output port 2 at minor time step 0.00016552

The strange thing is that the "MATLAB I1" block has only one output port. Is there any way in which a Matlab function block can have something like hidden ports? I get 'Inf" and "NaN" warnings, which is obviously quite troubling...

I apologise if I'm not giving enough info.

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Answer 1

Niklas Nylén 2014-4-1

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https://ww2.mathworks.cn/matlabcentral/answers/123996-warnings-for-non-existent-ports-in-a-matlab-function-block#answer_131636

编辑：Niklas Nylén 2014-4-1

If the S-function was generated in Real time workshop/Simulink coder you can right click MATLAB I1 and select Look under mask. You should be able to see another "layer" where more outputs may exist.

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Niklas Nylén 2014-4-1

编辑：Niklas Nylén 2014-4-1

Possibly outport 2 inside the S-function is only used for internal feedback and that is why there is no second outport on 'MATLAB I1'. As far as I know it is not possible to look inside an S-function unless you have access to the source code.

Niel 2014-4-1