Véhicules routiers — Systèmes tachygraphes — Partie 4: Interface de communication de l'unité d'affichage

This document specifies the CAN-based data communication between the display unit and other devices connected to an SAE J1939-based in-vehicle network. The provided requirements and recommendations cover physical, data link, network, and application layers according to the OSI reference model. Additionally, it specifies the parameter groups, which are supported.