Module 4 – The zone logic

Learning objective

Understand how zones determine behavior and how operators S, I, M, 0 work.

Explanation

Zones are the link between logic and reality. Each zone reacts to the state with an operator:

• S: Execute action, wait for feedback.

• I: Monitor safety.

• M: Observe diagnostics.

• 0: Ignore.

Task

Take a cylinder with two end-position sensors. Define which operators it has in the following states:

1. Home,

2. Extend,

3. Retract. Explain why.