ISO 17987-7:2016

Road vehicles — Local Interconnect Network (LIN) — Part 7: Electrical Physical Layer (EPL) conformance test specification

ISO 17987-7:2016 specifies the conformance test for the electrical physical layer (EPL) of the LIN communications system. It is part of this document to define a test that considers ISO 9646 and ISO 17987‑4. The purpose of ISO 17987-7:2016 is to provide a standardized way to verify whether a LIN bus driver is compliant to ISO 17987?4. The primary motivation is to ensure a level of interoperability of LIN bus drivers from different sources in a system environment. ISO 17987-7:2016 provides all the necessary technical information to ensure that test results are consistent even on different test systems, provided that the particular test suite and the test system are compliant to the content of this document.

Véhicules routiers — Réseau Internet local (LIN) — Partie 7: Spécification d'essai de conformité de la couche électrique physique (EPL)

General Information

• Status: Published
• Publication Date: 13-Dec-2016
• ICS: 01.040.43 - Road vehicle engineering (Vocabularies)
• ICS: 43.020 - Road vehicles in general
• ICS: 43.040.15 - Car informatics. On board computer systems
• Technical Committee: ISO/TC 22/SC 31 - Data communication
• Drafting Committee: ISO/TC 22/SC 31/WG 3 - In-vehicle networks
• Parallel Committee: ISO/TC 43/SC 1/WG 27 - Joint ISO/TC 43/SC 1 - ISO/TC 22 WG: Effect of temperature on tyre/road noise testing
• Current Stage: 9599 - Withdrawal of International Standard
• Start Date: 28-May-2025
• Completion Date: 31-May-2025

Relations

• Consolidated By: ISO 25239-4:2020 - Friction stir welding — Aluminium — Part 4: Specification and qualification of welding procedures
• Effective Date: 06-Jun-2022
• Revised: ISO 17987-7:2025 - Road vehicles — Local Interconnect Network (LIN) — Part 7: Electrical physical layer (EPL) conformance test specification
• Effective Date: 06-Jun-2022

Standards Content (Sample)

DRAFT INTERNATIONAL STANDARD
ISO/DIS 17987-7.2
ISO/TC 22/SC 31 Secretariat: DIN
Voting begins on: Voting terminates on:
2015-12-10 2016-03-10
Road vehicles — Local Interconnect Network (LIN) —
Part 7:
Electrical Physical Layer (EPL) conformance test
specification
Véhicules routiers — Réseau Internet local (LIN) —
Partie 7: Spécification d’essai de conformité de la couche électrique physique (EPL)
ICS: 43.040.15
THIS DOCUMENT IS A DRAFT CIRCULATED
FOR COMMENT AND APPROVAL. IT IS
THEREFORE SUBJECT TO CHANGE AND MAY
NOT BE REFERRED TO AS AN INTERNATIONAL
STANDARD UNTIL PUBLISHED AS SUCH.
IN ADDITION TO THEIR EVALUATION AS
BEING ACCEPTABLE FOR INDUSTRIAL,
TECHNOLOGICAL, COMMERCIAL AND
USER PURPOSES, DRAFT INTERNATIONAL
STANDARDS MAY ON OCCASION HAVE TO
BE CONSIDERED IN THE LIGHT OF THEIR
POTENTIAL TO BECOME STANDARDS TO
WHICH REFERENCE MAY BE MADE IN
Reference number
NATIONAL REGULATIONS.
ISO/DIS 17987-7.2:2015(E)
RECIPIENTS OF THIS DRAFT ARE INVITED
TO SUBMIT, WITH THEIR COMMENTS,
NOTIFICATION OF ANY RELEVANT PATENT
RIGHTS OF WHICH THEY ARE AWARE AND TO
©
PROVIDE SUPPORTING DOCUMENTATION. ISO 2015

ISO/DIS 17987-7.2:2015(E)
© ISO 2015, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. [phone]
Fax [phone]
[e-mail]
www.iso.org
ii © ISO 2015 – All rights reserved

ISO/DIS 17987-7
Contents Page
Foreword . iv
Introduction . v
1 Scope . 1
2 Normative references . 1
3 Terms, definitions, symbols and abbreviated terms . 1
3.1 Terms and definitions . 1
3.2 Symbols . 2
3.3 Abbreviated terms . 5
4 Conventions . 6
5 Document overview . 7
6 LIN devices with RX and TX access . 8
6.1 Test specification overview . 8
6.2 Operational conditions – Calibration . 9
6.3 Static test cases . 32
7 LIN devices without RX and TX access . 36
7.1 Test specification overview . 36
7.2 Communication scheme . 36
7.3 Test case organisation . 40
7.4 Measurement and signal generation – Requirements . 40
7.5 Operational conditions – Calibration . 43
7.6 Operation mode termination . 86
7.7 Static test cases . 88
8 EPL 24V LIN devices with RX and TX access . 92
8.1 Test specification overview . 92
8.2 Operational conditions – Calibration . 93
8.3 Static test cases . 120
9 EPL 24 V LIN devices without RX and TX access . 124
9.1 Test specification overview . 124
9.2 Communication scheme . 124
9.3 Test case organisation . 128
9.4 Measurement and signal generation – Requirements . 128
9.5 Operational conditions – Calibration . 131
9.6 Static test cases . 178
Bibliography . 182
Bibliography . 183

ISO/DIS 17987-7
Foreword
ISO (the International Organization for Standardization) is a worldwide federation of national standards bodies
(ISO member bodies). The work of preparing International Standards is normally carried out through ISO
technical committees. Each member body interested in a subject for which a technical committee has been
established has the right to be represented on that committee. International organizations, governmental and
non-governmental, in liaison with ISO, also take part in the work. ISO collaborates closely with the
International Electrotechnical Commission (IEC) on all matters of electrotechnical standardization.
International Standards are drafted in accordance with the rules given in the ISO/IEC Directives, Part 2.
The main task of technical committees is to prepare International Standards. Draft International Standards
adopted by the technical committees are circulated to the member bodies for voting. Publication as an
International Standard requires approval by at least 75 % of the member bodies casting a vote.
Attention is drawn to the possibility that some of the elements of this document may be the subject of patent
rights. ISO shall not be held responsible for identifying any or all such patent rights.
ISO 17987-7 was prepared by Technical Committee ISO/TC 22, Road vehicles, Subcommittee SC 3,
Electrical and electronic equipment.
ISO 17987 consists of the following parts, under the general title Road vehicles — Local interconnect network
(LIN):
 Part 1: General information and use case definition
 Part 2: Transport protocol and network layer services
 Part 3: Protocol specification
 Part 4: Electrical Physical Layer (EPL) specification 12 V / 24 V
 Part 5: Application Programmers Interface (API)
 Part 6: Protocol conformance test specification
 Part 7: Electrical Physical Layer (EPL) conformance test specification
iv © ISO 2013 – All rights reserved

ISO/DIS 17987-7
Introduction
This document set specifies the use cases, the communication protocol and physical layer requirements of an
in-vehicle communication network called "Local Interconnect Network (LIN)".
The Local interconnect network (LIN) protocol as proposed is an automotive focused low speed UART-based
network (Universal Asynchronous Receiver Transmitter). Some of the key characteristics of the LIN protocol
are signal based communication, schedule table based frame transfer, master/slave communication with error
detection, node configuration and diagnostic service transportation.
The LIN protocol is for low cost automotive control applications, for example door module and air condition
systems. It serves as a communication infrastructure for low-speed control applications in vehicles by
providing:
 Signal based communication to exchange information between applications in different nodes;
 Bitrate support from 1 kbps to 20 kbps;
 Deterministic schedule table based frame communication;
 Network management that wakes up and puts the LIN cluster into sleep mode in a controlled manner;
 Status management that provides error handling and error signalling;
 Transport layer that allows large amount of data to be transported (such as diagnostic services);
 Specification of how to handle diagnostic services;
 Electrical physical layer specifications;
 Node description language describing properties of slave nodes;
 Network description file describing behaviour of communication;
 Application programmer's interface;
To achieve this, it is based on the Open Systems Interconnection (OSI) Basic Reference Model specified in
ISO/IEC 7498-1 and ISO/IEC 10731, which structures communication systems into seven layers. When
mapped on this model, the protocol and physical layer requirements specified by ISO 17987 are structured
according to Table°1.
ISO/DIS 17987-7
Table°1°—°LIN specifications applicable to the OSI layers
Vehicle manufacturer enhanced
Applicability OSI seven layer LIN
diagnostics
Application (layer 7) ISO 17987-1, ISO 17987-5 ISO°14229-1, ISO°14229-7
Presentation (layer 6) ISO 17987-5 vehicle manufacturer specific
Session (layer 5) ISO 17987-3 ISO°14229-2
Seven layer according
to ISO°7498-1 and Transport (layer 4)
ISO 17987-2
ISO/IEC 10731
Network (layer 3)
Data link (layer 2) ISO 17987-3, ISO 17987-6
Physical (layer 1) ISO 17987-4, ISO 17987-7

ISO 17987 Parts 2, 3, 4, 6 and 7 being the common standards for the OSI layers 1 through 3 for LIN and the
vehicle manufacturer enhanced diagnostics.
The vehicle manufacturer enhanced diagnostics column shows application layer services covered by
ISO 14229-7 which have been defined in compliance with diagnostic services established in ISO 14229-1, but
are not limited to use only with them. ISO 14229-7 is also compatible with most diagnostic services defined in
national standards or vehicle manufacturer's specifications. The presentation layer is defined vehicle
manufacturer specific. The session layer services are covered by ISO 14229-2. The transport protocol and
network layer services are specified in ISO 17987-2.

vi © ISO 2013 – All rights reserved

DRAFT INTERNATIONAL STANDARD ISO/DIS 17987-7

Road vehicles — Local interconnect network (LIN) — Part 7:
Electrical Physical Layer (EPL) conformance test specification
1 Scope
This part of ISO 17987 specifies the conformance test for the electrical physical layer of the LIN
communications system.
It is part of this document to define a test that considers ISO 9646 and ISO 17987-4.
The purpose of this document is to provide a standardized way to verify whether a LIN bus driver is compliant
to ISO 17987-4. The primary motivation is to ensure a level of interoperability of LIN bus drivers from different
sources in a system environment.
This document shall provide all necessary technical information to ensure that test results will be identical
even on different test systems, provided that the particular test suite and the test system are compliant to the
content of this document.
2 Normative references
The following referenced documents are indispensable for the application of this document. For dated
references, only the edition cited applies. For undated references, the latest edition of the referenced
document (including any amendments) applies.
ISO 17987-1, Road vehicles – Local interconnect network (LIN) – Part 1: General information and use case
definition
ISO 17987-2, Road vehicles – Local interconnect network (LIN) – Part 2: Transport protocol and network layer
services
ISO 17987-3, Road vehicles – Local interconnect network (LIN) – Part 3: Protocol specification
ISO 17987-4, Road vehicles – Local interconnect network (LIN) – Part 4: Electrical Physical Layer (EPL)
specification 12V/24V
ISO 17987-5, Road vehicles – Local interconnect network (LIN) – Part 5: Application Programmers Interface
(API)
ISO 17987-6, Road vehicles – Local interconnect network (LIN) – Part 6: Protocol conformance test
specification
3 Terms, definitions, symbols and abbreviated terms
3.1 Terms and definitions
For the purposes of this document, the terms and definition defined in ISO 17987-4 apply.
ISO/DIS 17987-7
3.2 Symbols
% percentage
µs microsecond
C1/2 capacitance
C capacitance in the communication line
COMMON
C` line capacitance
LINE
C total bus capacitance
BUS
C ca
...

INTERNATIONAL ISO
STANDARD 17987-7
First edition
2016-12-01
Road vehicles — Local Interconnect
Network (LIN) —
Part 7:
Electrical Physical Layer (EPL)
conformance test specification
Véhicules routiers — Réseau Internet local (LIN) —
Partie 7: Spécification d’essai de conformité de la couche électrique
physique (EPL)
Reference number
©
ISO 2016
© ISO 2016, Published in Switzerland
All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form
or by any means, electronic or mechanical, including photocopying, or posting on the internet or an intranet, without prior
written permission. Permission can be requested from either ISO at the address below or ISO’s member body in the country of
the requester.
ISO copyright office
Ch. de Blandonnet 8 • CP 401
CH-1214 Vernier, Geneva, Switzerland
Tel. [phone]
Fax [phone]
[e-mail]
www.iso.org
ii © ISO 2016 – All rights reserved

Contents Page
Foreword .v
Introduction .vi
1 Scope . 1
2 Normative references . 1
3 Terms, definitions, symbols and abbreviated terms . 1
3.1 Terms and definitions . 1
3.2 Symbols . 1
3.3 Abbreviated terms . 4
4 Conventions . 5
5 EPL 12 V LIN devices with RX and TX access . 5
5.1 Test specification overview . 5
5.1.1 Test case organization . 5
5.1.2 Measurement and signal generation requirements . 6
5.2 Operational conditions — Calibration . 7
5.2.1 Electrical input/output, LIN protocol . 7
5.2.2 [EPL–CT 1] Operating voltage range . 7
5.2.3 Threshold voltages . 8
5.2.4 [EPL–CT 5] Variation of V . .
SUP_NON_OP 12
5.2.5 I under several conditions .13
BUS
5.2.6 Slope control .16
5.2.7 Propagation delay .19
5.2.8 Supply voltage offset.21
5.2.9 Failure .28
5.2.10 [EPL–CT 22] Verifying internal capacitance and dynamic interference —
IUT as slave .30
5.3 Operation mode termination .32
5.3.1 General.32
5.3.2 [EPL–CT 23] Measuring internal resistor — IUT as slave .33
5.3.3 [EPL–CT 24] Measuring internal resistor — IUT as master .34
5.4 Static test cases .34
6 EPL 12 V LIN devices without RX and TX access .38
6.1 Test specification overview .38
6.2 Communication scheme .38
6.2.1 General.38
6.2.2 IUT as slave .38
6.2.3 IUT as master .39
6.2.4 IUT class C device .40
6.3 Test case organization .42
6.4 Measurement and signal generation — Requirements .43
6.4.1 Data generation . .43
6.4.2 Various requirements .45
6.5 Operational conditions — Calibration .45
6.5.1 Electrical input/output, LIN protocol .45
6.5.2 [EPL–CT 25] Operating voltage range .45
6.5.3 Threshold voltages .47
6.5.4 [EPL–CT 29] Variation of V ∈ [–0,3 V to 7,0 V], [18 V to 40 V] .51
SUP_NON_OP
6.5.5 I under several conditions .52
BUS
6.5.6 Slope control .55
6.5.7 [EPL–CT 35] Propagation delay .59
6.5.8 Supply voltage offset.65
6.5.9 Failure .74
6.5.10 [EPL–CT 48] Verifying internal capacitance and dynamic interference —
IUT as slave .76
6.6 Operation mode termination .78
6.6.1 General.78
6.6.2 [EPL–CT 49] Measuring internal resistor — IUT as slave .79
6.6.3 [EPL–CT 50] Measuring internal resistor — IUT as master .79
6.7 Static test cases .79
7 EPL 24 V LIN devices with RX and TX access .82
7.1 Test specification overview .83
7.1.1 Test case organization .83
7.1.2 Measurement and signal generation — Requirements .83
7.2 Operational conditions — Calibration .84
7.2.1 Electrical input/output, LIN protocol .84
7.2.2 [EPL–CT 51] Operating voltage range .84
7.2.3 Threshold voltages .86
7.2.4 [EPL–CT 55] Variation of V .
SUP_NON_OP 90
7.2.5 I under several conditions .91
BUS
7.2.6 Slope control .94
7.2.7 Propagation delay .97
7.2.8 Supply voltage offset.98
7.2.9 Failure .112
7.2.10 [EPL–CT 80] Verifying internal capacitance and dynamic interference —
IUT as slave .114
7.3 Operation mode termination .116
7.3.1 General.116
7.3.2 [EPL–CT 81] Measuring internal resistor — IUT as slave .117
7.3.3 [EPL–CT 82] Measuring internal resistor — IUT as master .117
7.4 Static test cases .118
8 EPL 24 V LIN devices without RX and TX access .121
8.1 Test speci
...