The only integration method you can set for co-simulation FMUs is Euler. Dassl is not supported.

Thanks for the feedback.

I have noticed that in ModelName_init_fmu.c the solverMethod always set to "dassl".

From model annotation such as

annotation(

    Icon(coordinateSystem(preserveAspectRatio = false)),

    Diagram(coordinateSystem(extent = {{-180, -180}, {180, 180}})),

  experiment(StartTime = 0, StopTime = 1E8, Tolerance = 1e-06, Interval = 0.001),

  __OpenModelica_commandLineOptions = "--matchingAlgorithm=PFPlusExt --indexReductionMethod=dynamicStateSelection -d=initialization,evaluateAllParameters,NLSanalyticJacobian -d=initialization ",

  __OpenModelica_simulationFlags(lv = "LOG_STATS", outputFormat = "csv", s = "euler"));

the values that written in ModelName_init_fmu.c are the one under experiment annotation (startTime, stopTime etc). That's why i was wondering why it was always defaulted to dassl.

sjoelund.se wrote:

The only integration method you can set for co-simulation FMUs is Euler. Dassl is not supported.

Hi Martin,

is the Step size in FMU set a a default value (e.g. 0.001s) or can we define it via annotation?

Thanks

As far as I can tell it simply uses the communicationStepSize sent to it by the master algorithm. It will not try to take smaller steps than that.