> For the complete documentation index, see [llms.txt](https://infosys.selmotech.com/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://infosys.selmotech.com/selmo-solution/selmo-solution-en/selmo-how-it-works/selmo-academy-training-manual-basics-and-quick-start/module-3-construction-of-the-switching-mechanism.md).

# Module 3 – Construction of the switching mechanism

#### **Learning objective**

Understand and apply the state machine and its elements (State, Decision, Timer, Repeater, Jump).

#### **Explanation**

The state machine is the clock.\
It operates according to the rule:\
**IF (AR = 1 AND ¬I AND ΣS = 0) THEN Next State.**

The elements:

* **State:** logical step with actions,
* **Decision:** branching,
* **Timer:** time-based state,
* **Repeater:** repetition,
* **Jump:** direct jump to a defined state.

#### **Exercise**

Draw a state machine with the states:\
"Waiting for start", "Cylinder moves", "Waiting for sensor", "Return to home position".\
Mark where a timer, decision or jump would make sense.


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