Tuning block parameters at each time step in Simscape Electrical

I am trying to find a way to change parameter values during a Simscape Electrical simulation using Matlab 2019B. I tested the method referenced below using a simple model of a battery and resistor, but the Resistor block does not seem to accept the updated parameter. Does the method below not work for Simscape Electrical blocks? Or is there a better way to do this?

https://www.mathworks.com/matlabcentral/fileexchange/24935-tuning-block-parameters-at-every-time-step-in-a-simulation?s_tid=prof_contriblnk

StartFcn code:

set(0,'ShowHiddenHandles','on');

%Set up the arguments that will go into the gain block event callback listener

blk = 'var_resistor_test_24Jan2023/Resistor';

event = 'PostOutputs';

listener = @update_param_test;

%Create the listener

h = add_exec_event_listener(blk, event, listener);

Listener script:

function varargout = update_param_test(varargin)

%

%

%

% based on code available from Mathworks at:

%https://www.mathworks.com/matlabcentral/fileexchange/24935-tuning-block-parameters-at-every-time-step-in-a-simulation

temp=str2num(get_param('var_resistor_test_24Jan2023/Resistor','R')); % Get current Gain val

temp=temp + 1; % Increment

temp1=num2str(temp);

set_param('var_resistor_test_24Jan2023/Resistor','R',temp1);

[Keith Int Veld]

It looks like the callback never happens. Is this because the resistor block doesn't allow callbacks?

Answer 1

[Sabin]

In Simscape Electrical it will not work in the same way as in Simulink. See more About Simscape Run-Time Parameters. In Simscape Electrical you can use Fast Restart but not possible to tune parameters at each step. If what you want to achive is to tune a Resistor/Inductor/Capacitor it is best to use Variable Resistor, Variable Inductor, or Variable Capacitor.

[Keith Int Veld]

Thanks, that helps!