What is ISO 20794‑5 about?
ISO 20794‑5 is part five of the multi-series standard that specifies the conformance test plan for ISO 20794‑2:2020 implementations.
ISO 20794‑5 specifies conformance test cases related to:
- Concept of operation
- Network management
- Transfer management
- Error management
Who is ISO 20794‑5 for?
ISO 20794‑5 on application layer conformance test plan is useful for:
- Road vehicle manufacturers
- Designers and developers of clock extension peripheral interface (CXPI)
- Automotive engineers
- Vehicle switches and sensors manufacturers
- Application layer designers and developers
Why should you use ISO 20794‑5?
CXPI is an automotive low-speed single wire network. It is an enabler for reducing vehicle weight and fuel consumption by reducing wire counts to simple devices like switches and sensors.
CXPI serves as and is designed for automotive control applications, for example door control group, light switch, and HVAC (Heating Ventilation and Air Condition) systems.
ISO 20794‑5 covers the application layer conformance test cases (CTC) to verify the requirements described in ISO 20794‑2 application layer document.
ISO 20794‑5 provides the test system set-up that follows ISO/IEC 9646‑1 and consists of a test system and a system under test (SUT) connected via the physical medium. The test system implements an upper tester (UT) and a lower tester (LT). The test system uses set-up parameters (see Figure 2, key 1) for testing the communication with the IUT.
ISO 20794‑5 lays out application layer conformance test plan for network management and fault management.