Simulink - Stateflow - Trigger Event

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Hi,

I am using trigger events to get a transition in STATEFLOW. I am using a signal which is -1 at time step 1, 0 at time step 2 and 1 and time step 3. I would like to get two triggered events out of this signal.

Stateflow only recognizes one rising trigger from -1 to 0. From 0 to 1, it does not recognize the rising trigger. However, if I pause for one time step at 0, then Stateflow recognizes the seconded rising trigger from 0 to 1 too. That would be -1 at time step 1, 0 at time step 2 and 3 and 1 at time step 4.

Is there a reason for this and what would be a work-around?

Thank you