How to use FMI.set/getStartValue for hierarchical values ?

[JBRDLR]

Functions work fine if values are top level values. When it comes to values in Submodels e.g. Infinity_C (Infinity's capacity) i do get the following error: FMIKit.getStartValue(gcb, 'infinty_C') Error using FMIKit.getStartValue (line 19) Java exception occurred: java.lang.RuntimeException: Variable 'infinty_C' does not exist at fmikit.ui.FMUBlockDialog.getStartValue(FMUBlockDialog.java:1611)

How does this need to be formatted to work?

Many thanks,

JBR

[t-sommer]

Can you share an FMU and some code to reproduce the problem?

[JBRDLR]

We develop IEEE MVC 2023 control competition - It will be announced via different channels the next week. Simply follow the installation instructions (about 1min). Afterwards open the testEnergyManagementAlgorithm.slx and select the FMU block. Afterwards, when you run in the MATLAB comandline: _FMIKit.getStartValue(gcb, 'SOCinit') --> Works fine, because it is atop level variable But this will fail: _FMIKit.getStartValue(gcb, 'powerSource_rex_REXparameters_H2_tank_level') Error using FMIKit.getStartValue (line 19) Java exception occurred: java.lang.RuntimeException: Variable 'powerSource_rex_REXparameters_H2_tanklevel' does not exist at fmikit.ui.FMUBlockDialog.getStartValue(FMUBlockDialog.java:1611) The Name of the variable seems to be correct when - i extracted it from the userData _userData = getparam(gcb, 'UserData') userData.parameters

Many thanks in advance,

Best JBR

[t-sommer]

You have to use the name as defined in the modelDescription.xml:

...
    <!-- Index for next variable = 4923 -->
    <ScalarVariable
      name="powerSource.rex.REXparameters.H2_tank_level"
      valueReference="16777500"
      description="10-3[kg] H2 tank initial level value"
      causality="parameter"
      variability="tunable">
      <Real start="4000.0"/>
    </ScalarVariable>
...

[JBRDLR]

Many thanks!