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GB/T 42691.7-2023Road vehicles - Local Interconnect Network(LIN) - Part 7: Electrical Physical Layer (EPL) conformance test specification (English PDF)

道路车辆局域互联网络（LIN）第7部分：电气物理层（EPL）一致性测试规范

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Issued by

State Administration for Market Regulation

Level / Type

National · Recommended

Issue date

May 23, 2023

Implementation date

December 1, 2023

Scope

GB/T 42691.7-2023 is the English-translated version of 道路车辆局域互联网络（LIN）第7部分：电气物理层（EPL）一致性测试规范.

GB/T 42691.7-2023 — This Document 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 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 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.

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Document preview — GB/T 42691.7-2023

National Standard of the People's Republic of China

ICS: 43.040.15

Issued by: State Administration for Market Regulation

Foreword...4
Introduction...6
1 Scope...8
2 Normative References...8
3 Terms, Definitions, Symbols and Abbreviated Terms...8
3.1 Terms and definitions...8
3.2 Symbols...9
3.3 Abbreviated terms...12
4 Conventions...13
5 EPL 12 V LIN Devices with RX and TX Access...14
5.1 Test specification overview...14
5.2 Operational conditions - Calibration...15
5.3 Operation mode termination...38
5.4 Static test cases...41
6 EPL 12 V LIN Devices without RX and TX Access...45
6.1 Test specification overview...45
6.2 Communication scheme...45
6.3 Test case organization...50
6.4 Measurement and signal generation - Requirements...50
6.5 Operational conditions - Calibration...53
6.6 Operation mode termination...87
6.7 Static test cases...89
7 EPL 24 V LIN Devices with RX and TX Access...92
7.1 Test specification overview...92
7.2 Operational conditions — Calibration...93
7.3 Operation mode termination...120
7.4 Static test cases...122
8 EPL 24 V LIN Devices without RX and TX Access...125
8.1 Test specification overview...125
8.2 Communication scheme...125
8.3 Test case organization...130
8.4 Measurement and signal generation — Requirements...131
8.5 Operational conditions — Calibration...133
8.6 Operation mode termination...171
8.7 Static test cases...173
Bibliography...177

Foreword

This Document was drafted in accordance with the rules in GB/T 1.1-2020 Directives for

Standardization - Part 1: Rules for the Structure and Drafting of Standardizing Documents.

This Document is Part 7 of GB/T 42691 Road Vehicles – Local Interconnect Network (LIN).

GB/T 42691 has published the following parts:

--- 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 12V/24V;

--- Part 5: Application Programmers Interface (API);

--- Part 6: Protocol Conformance Test Specification;

--- Part 7: Electrical Physical Layer (EPL) Conformance Test Specification;

--- Part 8: Electrical Physical Layer (EPL) Specification: LIN over DC Powerline (DC-LIN).

This Document equivalently adopts ISO 17987-7:2016 Road Vehicles – Local Interconnect

Network (LIN) – Part 7: Electrical Physical Layer (EPL) Conformance Test Specification.

Please note some contents of this Document may involve patents. The issuing agency of this

Document shall not assume the responsibility to identify these patents.

This Document was proposed by the Ministry of Industry and Information Technology of the

PRC.

This Document shall be under the jurisdiction of National Technical Committee of Auto

Standardization (SAC/TC 114).

Drafting organizations of this Document: Great Wall Motor Company Limited; China

Automotive Technology and Research Center Co., Ltd.; Dongfeng Motor Group Co., Ltd.;

FAW-Volkswagen Automotive Co., Ltd.; Pan-Asia Technical Automotive Center Co., Ltd.;

Huizhou Desay SV Automotive Co., Ltd.; Geely Automobile Research Institute (Ningbo) Co.,

Ltd.; China FAW Group Co., Ltd.; SAIC Maxus Automotive Co., Ltd.; Beijing National New

Energy Vehicle Technology Innovation Center Co., Ltd.; CATARC (Tianjin) Automotive

Engineering Research Institute Co., Ltd.; CATARC (Tianjin) Automotive Inspection Center Co.,

Ltd.; and SAIC-GM-Wuling Automobile Co., Ltd.

Road Vehicles – Local Interconnect Network (LIN) – Part 7:

Electrical Physical Layer (EPL) Conformance Test Specification

1 Scope

This Document 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 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 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.

2 Normative References

The following documents are essential to the application of this Document. For the dated

documents, only the versions with the dates indicated are applicable to this Document; for the

undated documents, only the latest version (including all the amendments) is applicable to this

Document.

GB/T 42691.4-2023 Road vehicles - Local Interconnect Network (LIN) - Part 4: Electrical

physical layer (EPL) specification 12 V/24 V (ISO 17987-4:2016, IDT)

ISO 17987-6 Road vehicles – Local Interconnect Network – Part 6: Protocol conformance

test specification

NOTE: GB/T 42691.6-2023 Road vehicles - Local Internet Network (LIN) - Part 6: Protocol

conformance test specification (ISO 17987-6:2016, IDT)

3 Terms, Definitions, Symbols and Abbreviated Terms

3.1 Terms and definitions

For the purposes of this document, the terms and definitions in ISO 17987–4 and ISO 17987–

For class C devices (e.g., microcontrollers with integrated transceiver or SBCs with integrated

UART and transceiver), a test application is required.

The type of test application depends on the type of integrated device.

6.2.4.2 IUT class C device as slave

This device type only supports slave applications.

For conformance testing, the IUT class C device as slave is supplied with a test application

which shall support the following test schemes:

— Application can adapt to all bit rates supported by the device;

— Checksum model: Enhanced checksum.

The communication between the test system and the IUT shall be implemented as follows:

1) Counter = 0;

2) Test System as master: Transmit a frame header (ID 0116), followed by response of one

data byte (counter [00]) and checksum;

3) IUT as slave: If frame is received without errors, store received counter and set transmit

flag;

4) Test System as master: Transmit frame header (ID 0216);

5) IUT as slave: If transmit flag is set, respond with one data byte (stored counter [00]) and

check sum, and clear transmit flag;

6) Test System as master: If IUT as slave has answered without errors and received counter

value == transmitted counter value, increment counter by 1;

7) Go to step 2).

One sequence of steps 2) to 7) is referred to as one communication cycle. A communication

cycle is considered successful, if the counter is incremented in step 6).

6.2.4.3 IUT as a class C device as master

This device type only supports master applications.

If the IUT does not have an integrated master pull-up resistor, it shall be equipped with an

external pull-up circuitry as specified in the IUT's datasheet. If the IUT's datasheet does not

specify a pull-up circuitry, the circuitry as described in Figure 19 is used.

Figure 19 shows the default master pull-up circuitry.

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This preview omits tables, figures, formulas and parts of the technical clauses. The complete document — 177 pages — is available in the English PDF.

Referenced standards

Normative references

ISO 17987

Cited by

GB/T 42691.8-2023Road vehicles - Local Interconnect Network (LIN) - Part 8: Electrical physical layer (EPL) specification: LIN over DC powerline (DC-LIN)

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