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GRAFCETDrawSimulateExport
Already 78,000+ GRAFCETs created
simple_grafcet.grafcetio
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Already 78,000+ GRAFCETs created
Press a button to try it out
GRAFCET (GRAphe Fonctionnel de Commande Étape Transition) is the graphical description language for control sequences per IEC 60848 – built from steps, transitions and actions.
Yes. Drawing is free without limits, simulation is free up to 5 steps, and PNG and PDF export is available with a watermark. PRO removes these limits.
No. grafcet.io runs directly in the browser, with no installation and no plugin. You do not need an account to draw or simulate either.
Yes. The simulator simulates the GRAFCET step by step: active steps are highlighted, an enabled transition fires as soon as its transition condition is true, and the actions of the active steps are executed. Time conditions, edges, macro-steps, enclosures and much more are supported.
PNG and PDF, and with PRO without a watermark plus SVG and WebP. Every GRAFCET can also be saved as a .grafcetio file and opened again later.
GRAFCET according to IEC 60848 describes the behavior of a control system independently of the technology used. SFC (Sequential Function Chart, IEC 61131-3), by contrast, is a PLC programming language that can be used to implement such a sequence.