Data type problems using PID Control Block in Simulink

Hi everyone!

I want to use a PID Control Block in my Simulink Model (R2023b), which only works with uint16 data types. I found the right configs in the PID Block to set all of the data types (inputs, outputs, etc.) to uint16. However, I get the error messages below:

1) Error:Data type mismatch. 'Input Port 1' of 'PID Controler/Tsamp - Ngain/Passthrough/Out1' expects a signal of data type 'double'. However, it is driven by a signal of data type 'uint16'.

Clicking on the path, a new Simulink window opens showing me the error site (see screenshot)

The problem is, that I cannot change the library of the PID Controler Block and I also cannot find any other configs the change the data type from double to uint16.

Do you have any ideas, how to solve the problem?

Thanks!

Best, Marco

Answer 1

[Pavl M.]

it is solvable,

just convert(cast) uint16 to double by appropriate datatype convertion simulink block or by just simulink matlab script block with out = double(inp) between the input port U and output port 1;

OK?

[Marco]

Thanks for the answer.

I cannot insert any blocks in the library of the PID Control Block from Simulink and due to the goal, that I want to stay with uint16 data types this is not possible.

My work around now is to change the continous controler to a discrete one. Here, I can change the two more data types to uint16 and the problem was solved.