As observed in the work performed; discrete-event system modelingwithModelica using the process-oriented approach is difficult and complex. The convenience to include a new concept in theModelica language has been observed and is discussed in this contribution. This new concept corresponds to themodel communicationmechanismusing messages. Messages help to describe the communication between components in a discrete-event system. They do not substitute the current discrete-event modeling capabilities of Modelica; but extend them. The proposed messages mechanism in Modelica is discussed in the manuscript. An implementation of the messages mechanism is also proposed.
Keywords: Discrete events; process-oriented modeling; Modelica; Arena; SIMAN; DEVS; messages