ISO 16844-4:2022 PDF

Name: ISO 16844-4:2022 — Road vehicles — Tachograph systems — Part 4: Display unit communication interface
SKU: ISO 16844-4:2022
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Road vehicles — Tachograph systems — Part 4: Display unit communication interface

Название (английский):

ISO 16844-4:2022

Road vehicles — Tachograph systems — Part 4: Display unit communication interface

Статус документа:: Действующий
Формат:: Электронный (PDF)
Количество страниц:: 12
Дата публикации:: 25 февраля 2022 г.
Издание:: ISO IS 16844 edition 3 version 1
ICS:: 43.040.10

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Описание (английский):

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.

Abstract

Похожие стандарты

Стандарты, упомянутые в описании

Overview

ISO 16844-4:2022 - Road vehicles - Tachograph systems - Part 4: Display unit communication interface - defines the CAN-based communication between a tachograph display unit and other devices on an SAE J1939-based in-vehicle network. The standard specifies requirements and recommendations across the physical, data link, network and application layers (OSI model) and lists the supported parameter groups used for exchanging tachograph-related data.

Key Topics and Technical Requirements

CAN physical layer: Compliance with SAE J1939-11 (250 kbit/s) and SAE J1939-14 (500 kbit/s); CAN cabling/termination out of scope.

Bit-timing: Single-sampling mode with a sample point between 80% and 88% of nominal bit time; explicit timing parameter ranges are provided for 250 kbit/s and 500 kbit/s operation.

Data link layer: Conformance with ISO 11898-1; only Classical Extended Frame Format (CEFF) frames are allowed; remote frames prohibited.

Transport layer: Support for SAE J1939-21 transport protocols, including BAM and TP.DT for multi-frame transfers.

Application layer: Based on SAE J1939-21 and SAE J1939-71 rules. Specifies required and optional parameter groups (PGs) and message handling behaviours.

Mandatory supported messages: time/date (TD), vehicle identification (VI), high-resolution vehicle distance (HRVD), service information (SERV), reset (RESET), tachograph (TCO1), driver identification (DI), time/date adjust (TDA), and electronic engine controller 1 (EEC1).

Optional messages: cab illumination (CL) plus additional PGs listed in Clause 9.

Parameter encoding rules: Multi-byte parameters use LSB in the lower byte position; ASCII strings transmit the first character first; parameter definitions are specified in ISO 16844-7.

Acknowledgement semantics: Control-byte values defined (e.g., 0 = positive ACK, 1 = negative ACK, 3 = cannot respond now).

Applications

Ensuring interoperability between tachograph display units and vehicle ECUs on SAE J1939 networks.

Guiding firmware development for display units, data loggers, telematics and maintenance tools that access tachograph data.

Supporting compliance testing and validation of in-vehicle communications for tachograph installations.

Enabling consistent data access for drivers, transport operators, workshops and enforcement authorities.

Related Standards

ISO 11898-1 (CAN data link & physical signalling)

ISO 16844-1, ISO 16844-7 (tachograph series)

SAE J1939-11, J1939-14, J1939-21, J1939-71 and SAE J1939DA

Keywords: ISO 16844-4, tachograph, CAN, SAE J1939, display unit communication interface, vehicle networks, parameter groups, PGN, transport protocol, vehicle telematics.

ISO 16844-4:2022 PDF

Abstract

Похожие стандарты

Overview

Key Topics and Technical Requirements

Applications

Who Uses This Standard

Related Standards

Технические детали

ISO 11898-1:2003

Road vehicles — Controller area network (CAN) — Part 1: Data link layer and physical signalling

BS ISO 16844-7:2022

Road vehicles. Tachograph systems. Parameters.

ISO 16844-1:2001

Road vehicles — Tachograph systems — Part 1: Electrical connectors

ISO 16844-4:2004

Road vehicles — Tachograph systems — Part 4: CAN interface