Inconsistent initial equation system in IDEAS.Airflow.AHU.Validation.AdsolairDatasheetSummer

[maltelenz]

When validating IDEAS.Airflow.AHU.Validation.AdsolairDatasheetSummer in Wolfram System Modeler, I get:

Error: The initial equation system is overdetermined and inconsistent in the equations:
   adsolair58.adsCon.damPid.risingEdge.pre_u_start = adsolair58.onOff
The equations are equivalent to:
   false = true
   (inconsistent)
This analysis required evaluation of the following parameters:
• adsolair58.adsCon.damPid.risingEdge.pre_u_start (= false)
• adsolair58.onOff (= true) 

which at first glance seems correctly reported to me.

[annadellisola]

@maltelenz Thank you for reporting it.
I have verified the model IDEAS.Airflow.AHU.Validation.AdsolairDatasheetSummer in Dymola, and I do not observe any errors or warnings there.

Please note that the IDEAS library is primarily developed and tested in Dymola. While efforts are made to maintain compatibility with OpenModelica, full compatibility is not guaranteed for other tools like Wolfram System Modeler.

Issues like the one you report may arise due to differences in how tools handle initialization and equation systems. Given that the reported inconsistency originates from parameter evaluation (pre_u_start = false vs. onOff = true), this seems to be related to how Wolfram System Modeler processes initial conditions compared to Dymola.

If you would like to propose changes to IDEAS that improve compatibility with tools such as Wolfram System Modeler (while maintaining correct behavior in Dymola), we would be happy to review and evaluate such contributions.