This example shows how only one Finite State gets executed at a time in a Hierarchical State Machine.

Introduction

Consider the model below with two Finite States:

Figure 1 - State machine with 2 Finite States and 1 transition

In each Finite State there is the following diagram:

Figure 2 - Diagram in the Finite States

And the transition is modeled as in Figure 3.

Figure 3 - Transition in Figure 1

Simulation

The transition in Figure 3 has an Analog Input which receives an unit step at 5s. Therefore, only after 5s de Finite State 2 can execute. This can be seen in the Figure 4 and Figure 5.

Figure 4 - Signal from Finite State 1

Figure 5 - Signal from Finite State 2

Looking at both graphics they seem to be the same. But, paying attention to the time axis, one sees that Finite State 2 only started to execute at 5s. It reproduces the behavior of only one Finite State executing at a time.