Export bus datatype from referenced subsystem

Question

Lukas 2024-5-7

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此问题的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2116111-export-bus-datatype-from-referenced-subsystem

回答： Yatharth 2024-5-22

I have created a nested bus in a referenced subsystem in simulink and would like to use the bus datatype again in a different model. For this i would like to export the datatype from simulink to a dataDictionary. I tried to open the referenced subsystem in a model and use the commands Simulink.Bus.createObject and Simulink.Bus.save. But i was not able to generate the object in matlab to save it afterwards. Is there a easier solution to this?

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Lukas 2024-5-13

Hy @Fangjun Jiang, thank you for your support in this

Sorry, for the misunderstanding, i checked the command on two different simulink models. First, on a new generic model, that just holds an easy Bus, that consists of a fiew constant and sine inputs. There, I was able to use the matlab commands.

After this, I used the same matlab commands on my model where i wanted to generate the bus structure in the first place. This did not work. I dont have any warnings, if i update or simulate this model. If i use the command "busInfo = Simulink.Bus.createObject(model,block)" , I dont have any warnings or errors either. But this command generated the simulink bus variables in my workspace in my first model. In the second model, it just generated the busInfo variable as a struct with the names of the busses inside, but no bus variables. I would have expected at least 3 to 5 Bus variables in my workspace, if I use this command in my second model.

If i use the command "Simulink.Bus.save("BusStructs","object");" afterwards, i get a file called BusStructs.m that has just 2 lines of code in it:

function BusStructs()

% BUSSTRUCTS initializes a set of bus objects in the MATLAB base workspace

To me, this sounds, as if the command Simulink.Bus.createObject did not work.

My second model is more complicated with arround 6 referenced subsystems in the model. Could it be, that matlab gets a problem, if i use "inherit datatype" on the inputs to my referenced subsystems and build new busses with these inputs?

Fangjun Jiang 2024-5-13

That is weird. No more advice other than trying on the real model. Maybe contact the Mathworks tech support.

Lukas 2024-5-13

I check again, maybee its just a setting i forgot. If i find my error, i will update the forum.

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Answer 1

Yatharth 2024-5-22

0
链接

此回答的直接链接

https://ww2.mathworks.cn/matlabcentral/answers/2116111-export-bus-datatype-from-referenced-subsystem#answer_1461436

在 MATLAB Online 中打开

Hi Lukas,

In your given code :

mdl = "BusHierarchy";
block = "BusHierarchy/Bus Creator1";
load_system(mdl)
busInfo = Simulink.Bus.createObject(mdl,block);
file1 = "DefaultFunction";
Simulink.Bus.save(file1); -> This command lead to an default matlab file without any content of the Bus Creator1

I am not able to figure out what is your referenced sub-system?

I will share my process and code for your reference:

1. Opening a Bus Object creation example

openExample('simulink/CreateSimulinkBusObjectFromBlockExample')

2. Modifying the BusObjectCreationModel.slx : I selected everything and right clicked to make a Subsystem named SS1

3. Modifying the CreateSimulinkBusObjectFromBlockExample.mlx file:

open_system('BusObjectCreationModel')
%Create a Bus object that corresponds with the bus created by the Bus Creator block.
busInfo = Simulink.Bus.createObject('BusObjectCreationModel','BusObjectCreationModel/SS1/Bus Creator'); %here I have added SS1 in the block path
Simulink.Bus.save('BusObjectFunctionCellFormat'); % here I have added the bus.save function to generate the BusObjectCreationModel.slx