Cannot find the pointers in my Simulink model, need to remove them for code generation

Hello all,

I am relatively new in the ways of code generation in Simulink and I've run into a problem.

When I try to convert a subsystem to PLC code (CoDeSyS 3.5), Simulink throws the following error:

Error:The model requires pointer type representation. This is not supported by Simulink PLC Coder.

### PLC code generation failed for 'UnderStruct_Mod_V1/Understructure'

I barely understand what a 'pointer type representation' is and I'm sure I've not included the need for pointers on purpose. I have exhausted my google-skills on this problem and honestly have no idea where to look anymore. Could someone please point me in the right direction? Is there a box that I should check or uncheck? Are there some elements in my model that force the use of pointers?

Much appreciated

Answer 1

[Dolf]

After some more detective work, I've found the issue. One of my scripts used the Matlab 'Find' function, which is not supported in PLC Code Generation. Apparently, this caused the pointer type error.

Answer 2

[Poorna]

Hi Dolf,

I see you are trying to use the PLC coder but couldn't generate PLC code. The error says that the model requires pointer type representation. Unfortunately, PLC coder has a restriction on pointer data types and does not support them. You might want to redesign your model to account for this.

Refer to the following documentation on Structured Text Code generation limitations:

https://www.mathworks.com/help/plccoder/ug/structured-text-code-generation-limitations.html

Hope this Helps!

[Dolf]

Hello Poorna,

Unfortunately, I couldn't solve the problem with the information provided. I know I need to redesign my model, but I cannot figure out what to change. I have a very similar model that generates PLC-code just fine.

I've divided my model in different sections to try and pinpoint which section is causing trouble and have managed to bring it down to this:

Does this provide more information for finding my problem, perhaps?