Programmatically change user defined Library objects in Simulink model

4 vues (au cours des 30 derniers jours)
Dear Sirs,
I have made a plain Simulink model consisting of Current Sensor/Scope/Switch etc. There are also two subsystems (Load and Battery) that are user defined Library objects. Links looks fine. The model works and simulation results are correct.
Now I want to programmatically (from Matlab command window) change the Library objects. Say from Load_RLC to Load_R. Both exists as Library objects. I have tried commandos like:
open_system('LowVoltageSystem')
add_block('Load_R','LowVoltageSystem')
pos=get_param('Load_RLC/LowVoltageSystem,'position')
delete_block('Load_RLC/LowVoltageSystem’)
set_param('Load_R','position',pos)
But the ‘Load_R’ can not be found (There is no block named 'Load_R')
I have also tried things like:
replace_block('LowVoltageSystem,'Load_RLC','Load_R')
Here the ‘Load_R’ is invalid block type.(Invalid NewBlock (<Load_R>) passed to REPLACE_BLOCK. Try built-in/BLOCKTYPE or a valid block name.)
The replace_block command, however, works with the built-in library blocks.
If I change the library components ‘manually’ everythings works, so there is nothing wrong with the components themselves.
What am I doing wrong here?
Best//Gert

Réponse acceptée

Fangjun Jiang
Fangjun Jiang le 27 Mai 2021
Modifié(e) : Fangjun Jiang le 27 Mai 2021
In the first part of your code, add_block() is not used properly. You need to specify the full path of both the source and destination blocks. Look at examples in "doc add_block".
replace_block() is the ideal function to use for your task. Again, you need to specify the full path of the source and desination blocks, e.g. 'CustomLibraryFile/LibraryBlock', 'ModelFile/ModelSystem/BlockName'. For custom library, you also need to open the library first using open_system() or load_system()
  4 commentaires
Gert Persson
Gert Persson le 27 Mai 2021
You are perfectly right!
I will make the model more clear by renaming the load in 'LowVoltagesystem' to 'Load'. I will also put the load in a library 'Load_Lib'. The command must then become:
replace_block('LowVoltageSystem','Name','Load', 'Load_Lib/Load_R')
Following the LibraryLink of the Load in the Simulink model 'LowVoltagesystem' then shows what Load is active.
If I remember right there was also an option for closing the "Replace Dialog" that appears. Nice things todo tomorrow :-)
Thanks a lot for your professional help!
Fangjun Jiang
Fangjun Jiang le 27 Mai 2021
To suppress the dialog box from being displayed, add the 'noprompt' argument as the last argument in the command.

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