7.3 The formal framework – cause and effect

The basic principle of every SEQ is:

Every action must have feedback.

This rule is universal – whether for cylinders, motors, calculations or sensors.

Without feedback the system does not know whether an action was actually executed. A timer can wait, but cannot confirm. Only feedback can do that.

Therefore every zone in the Selmo standard is structured so that it links action and feedback in a logical unit. If you follow this principle, Selmo always works.

🧩 1. Dialectical classification of the term “function”

Thesis

A function is the goal-directed effect of a system or subsystem that fulfills a defined purpose.

→ A function connects cause and effect within a system. It is what becomes effectiveonce certain conditions are met.

Antithesis

Function is not the physical component (mechanics, electrical, software), but the principle of actionthat is realized by these components.

• The mechanics provide the force,

• the electrical system the energy,

• the control the condition,

• but the function is the meaning of the operation – what is achieved.

Example:

A cylinder extends to clamp. – The cylinder is technology. – The extension is behavior. – That clamp is function.

Synthesis

Function is the “why” of a technical action, not the “how”. It is goal-directed, purpose-oriented and reusable. In the Selmo context it is formalized, i.e. converted into a clearly describable, measurable and controllable definition.

🔒 6. Conclusion: Definition in the Selmo context

Function in the Selmo context is a formally described, reusable, deterministic operation, that fulfills a clear purpose and is embedded in the sequence via defined interfaces, parameters and monitoring .

It can:

• act physically (mechanics, electrical, pneumatic),

• act informatically (calculation, communication, control),

• or act systemically (monitoring, diagnosis, synchronization) – but always within a defined state and process model.