After each restart, the parameters of the multimeter blocks change randomly (Simulink Simscape Electrical - Specialized Power Systems)

Hey everyone,

I am currently using Simulink Simscape Electrical Specialized Power Systems extensively for my work. However, I have encountered a persistent issue that I find quite bothersome.

In order to perform measurements of voltages, currents, etc., I rely on several multimeter blocks. Unfortunately, after each program restart, the output parameters/measurement parameters of these multimeter blocks change randomly. As a result, I have to reconfigure the multimeter blocks every time I restart the program. This process is quite cumbersome and time-consuming.

I was wondering if any of you have experienced the same or a similar issue and could provide me with some guidance or assistance in resolving it.

Thank you in advance for your help.

Best regards,

Torben

Answer 1

[Githin George]

Hello Torben,

I have never encountered a similar issue with the “Multimeter Block”. From your description this seems like a bug to me. But it would be great if you could share the model to take a closer look at the issue.

As a workaround, I would suggest trying to configure your measurement parameters for the “Multimeter Blocks” programmatically. You can refer to the following script as an example:

block = 'myModel/Multimeter';

open_system(block); % open the 'Multimeter' block

hm = findall(0,'type','figure','name',block);

guidata(hm) % list all availbe handles

hAll = guihandles(hm); % get all handles

set(hAll.SelectedListBox,'Value',1:3); % select all 3 measurements in the 'Selected Measurements'

feval(get(hAll.RemoveButton,'Callback'),hAll.RemoveButton,[]); % remove them

set(hAll.AvailableListBox,'Value',1); % select the first 2 measurements in the 'Available Measurements'

feval(get(hAll.SelectButton,'Callback'),hAll.SelectButton,[]); % add them into the 'Selected Measurements'

feval(get(hAll.CloseButton,'Callback'),hAll.CloseButton,[]); % close the 'Multimeter' block

The above example involves configuring the Block Dialog box for the “Multimeter Block” in the path “myModel/Multimeter”. You can extend the script to configure your other blocks.

Refer to the following documentation links for more information on the functions used:

• findall: https://www.mathworks.com/help/matlab/ref/findall.html
• guidata: https://www.mathworks.com/help/matlab/ref/guidata.html
• guihandles: https://www.mathworks.com/help/matlab/ref/guihandles.html
• set: https://www.mathworks.com/help/matlab/ref/set.html
• feval: https://www.mathworks.com/help/matlab/ref/feval.html

I hope this helps!

[Torben]

Hello,

Thank you very much for your detailed response and support. Since the information pertains to internal company matters, I am unable to release the models at this time. However, I will take a closer look at your alternative solution and observe when exactly the issue occurs for me. It doesn't happen every time, so perhaps I can eventually identify a pattern and pinpoint where the error lies.

If I find myself unable to make any progress, I will reach out to you again!

Thank you very much!

Best regards,

Torben