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2. Control system modeling
The functions performed by control systems are diverse. The ABS of a car and the control of a conveyor belt in an assembly plant are two different activities which apparently have little in common. They are both different, for example, from the glass-making process in a float glass plant. However, despite appearances, control systems all operate according to identical principles, which can be deduced from the very meaning of the word control. A priori, this profound unity should make it possible to design general-purpose languages and metamodels. However, as we have seen, the proposal is vertical. To understand this paradox, we need to look at how real time is perceived.
2.1 The dichotomies of real time
We have selected five dichotomous expressions that are...
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Control system modeling
Graphic languages
Bibliography
References
Standards
- Établissement des diagrammes fonctionnels pour systèmes de commande (première édition) - CEI 848 - 1988
- Langage de spécification Grafcet pour diagrammes fonctionnels en séquence - CEI 60848 - fév. 2002
- Programmable logic controllers – Part 3: programming languages - CEI 61131-3 - janv. 2003
- Function blocks for industrial process measurement and control systems – Part 1: architecture - IEC/PAS 61499-1 - sept....
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