external c function?

i don't understand
what do you mean?

If I got you right, you want to get the current time within your Modelica model. That can be done easily using external functions. The following is a brief example that extracts the current hours information:

model TimeTest

  impure function getHours

    output Integer x;

  external "C" x = _getHours() annotation(Include = "#include <stdio.h>

    #include <time.h>

    int _getHours()

    {

      time_t now;

      struct tm *ts;

      

      /* Get the current time */

      now = time(NULL);

      ts = localtime(&now);

      

      return ts->tm_hour;

    }");

  end getHours;



  parameter Integer h = getHours();

end TimeTest;

yes exactly! it works!
but how can i add also minutes and the date ?
thanks for the help

All these information is available from the struct tm:
year: tm->tm_year+1900
month: tm->tm_mon
day: tm->tm_mday
hour tm->tm_hour
minute: tm->tm_min
second: tm->tm_sec