get_param(confgset, 'SampleTime') does not return any value...

I'm trying to get the value of SampleTime parameter in ConfigSet in my Simulink model.

I set a certain value in seconds in Fixed Sample Time in Solver Detail group of Configuration window,

and then tried to read it in matlab console, such as followings;

>> conf = getActiveConfigSet('MyModel');

>> get_param (conf, 'StartTime')

ans = '0.0'

>> get_param (conf, 'StopTime')

ans = 'inf'

>> get_param (conf, 'SampleTime')

Property 'SampleTime' does not exist.

My question is why get_parameter 'SampleTime' does not work while earlier two, 'StartTime' and 'StopTime', works ok.

Any suggestion related to SampleTime parameter in ConfigSet would be appreciated.

Besides, I don't have Simulink Real-Time package license so that I can't use slrealtime target.

Answer 1

[Fangjun Jiang]

Your lucky guess stopped at three.

It is not called 'SampleTime'. You are probably looking for 'MaxStep'.

https://www.mathworks.com/help/simulink/gui/solver-pane.html

Follow this link or open the help document of the model configuration parameter page to find the parameter name under "Programmatic Use"

[Mato]

Well, I might missed explaining the type of solver is Fixed Type.

As I typed in get_param(.., 'MaxStep') in MATLB console, I got an error.

I used 'FixedStep' instead, then I got correct answer.

Thanks a lot for your advice !!

>> conf = getActiveConfigSet('MyModel');

>> get_param (conf, 'MaxStep')

When 'SolverType' is fixed-step, parameter 'MaxStep' is ignored.

>> get_param (conf, 'FixedStep')

ans = 0.02