Automatisme

This parts of the site contains "automated control" articles subject. For the most they are issues from ancient publications, but still be relevant. Hope they could lighted your thinking about this huge part of industrial engenering.

Here you will find a .pdf copy of the latest known grafcet standard NF-EN 6848. Grafcet (Graphe Fonctionnel de Commande Etape Transitions) is a system for describing sequential automation created in 1977 by AFCET (Association française pour la cybernétique économique et technique), based on the work of M. Christian Merlaud (to whom we pay tribute here). Many of the articles in this sub-section refer to this standard (which is difficult to find natively on the net...).

In this article, you will find an implementation study of the GRAFCET (which respects the five rules) on a digital system.

This article puts into practice the previous method applied to Siemens CPU 103 and 95U PLCs. You will find all the standard units to be used for your project. Various examples are provided to help you familiarise yourself with the method.

This article puts into practice the previous method applied to Siemens CPU 202 and 214 PLCs. You will find all the standard units to be used for your project. Various examples are provided to help you familiarise yourself with the method.

A slightly more complex example of processing a keyboard encoded on a CPU 103 using the previous method.