IEC 61784-2-20-2023 PDF

Full title and description

Industrial networks - Profiles - Part 2-20: Additional real-time fieldbus profiles based on ISO/IEC/IEEE 8802-3 - CPF 20 (IEC 61784-2-20:2023). This document defines Communication Profile Family 20 (CPF 20), a set of Real‑Time Ethernet (RTE) communication profiles and associated network component selections and performance indicators for deterministic industrial communications.

Abstract

IEC 61784-2-20:2023 specifies CPF 20 (also referenced as ADS‑net in places) — additional RTE communication profiles built on ISO/IEC/IEEE 8802-3 (Ethernet) and elements of the IEC 61158 series (Type 25). For each profile it defines profile selections for the physical, data‑link and application layers, the related network components, and RTE performance indicators (delivery time, throughput, non‑RTE bandwidth) together with dependency matrices to support deterministic behaviour in fieldbus applications.

General information

• Status: International Standard (active).
• Publication date: 5 May 2023 (IEC publication date).
• Publisher: International Electrotechnical Commission (IEC).
• ICS / categories: 35.100.20, 35.240.50.
• Edition / version: Edition 1.0 (2023).
• Number of pages: 49 pages (IEC base publication).

Scope

This standard defines Communication Profile Family 20 (CPF 20) as a set of additional real‑time fieldbus profiles based on ISO/IEC/IEEE 8802-3 and relevant IEC 61158 elements (Type 25). It specifies the structure of CPF 20 (profiles CP 20/1, CP 20/2), the allowed protocol and service selections at physical, data‑link and application layers, the required network components and interconnections, and the RTE performance indicators and their dependency relations to enable selection of consistent deterministic performance sets. The scope emphasizes deterministic delivery, throughput and coexistence with non‑RTE traffic for industrial automation networks.

Key topics and requirements

• Definition of CPF 20 profiles (CP 20/1, CP 20/2) and their layer‑by‑layer selections.
• Specification of RTE performance indicators: delivery time, RTE throughput, non‑RTE bandwidth and dependency matrices.
• Mapping and configuration guidance for deterministic behaviour on ISO/IEC/IEEE 8802-3 networks (including VLAN/prioritization considerations).
• Identification of network component roles and interconnection rules to meet CPF 20 requirements.
• Normative references to IEC 61158 (Type 25) elements and Ethernet family standards necessary to implement the profiles.

Typical use and users

Used by industrial automation system architects, device and network component manufacturers, control system integrators, test and certification laboratories, and standards bodies to design, implement and verify deterministic Real‑Time Ethernet solutions for factory and process automation. Engineers use the profile selections and performance indicator matrices to ensure devices and networks meet required real‑time behaviour.

Related standards

Part of the IEC 61784 series (profiles for industrial networks); closely related to IEC 61158 (fieldbus protocol elements, Type 25 references), ISO/IEC/IEEE 8802-3 (Ethernet) and other parts of IEC 61784 that define CPF families and general profile rules. National/adopted versions exist (EN/UNE/BS/STN adoptions) as regional implementations of the IEC text.

Keywords

IEC 61784, CPF 20, real‑time Ethernet, RTE, communication profile family, fieldbus profiles, IEC 61158 Type 25, ISO/IEC/IEEE 8802-3, deterministic networking, industrial automation.

FAQ

Q: What is this standard?

A: IEC 61784-2-20:2023 is an international standard that defines Communication Profile Family 20 (CPF 20), a set of additional real‑time Ethernet fieldbus profiles and the related network component and performance requirements for deterministic industrial communications.

Q: What does it cover?

A: It covers the definition of CPF 20 profiles (CP 20/1, CP 20/2), allowed selections at the physical, data‑link and application layers, network component roles, and RTE performance indicators (delivery time, throughput, non‑RTE bandwidth) including dependency matrices to select consistent performance targets.

Q: Who typically uses it?

A: Device vendors, system integrators, control engineers, test houses and standards bodies who design, build or certify deterministic Real‑Time Ethernet solutions for industrial automation.

Q: Is it current or superseded?

A: It is current. IEC lists the publication as 2023 (Edition 1.0) with a stability target date into 2028, indicating it is the active international publication as of 2023.

Q: Is it part of a series?

A: Yes — it is Part 2-20 of the IEC 61784 series (Profiles); CPF 20 is one of several communication profile families defined across the series. The document references and builds on other IEC 61784 parts and on IEC 61158 and ISO/IEC/IEEE 8802-3 standards.

Q: What are the key keywords?

A: CPF 20, real‑time Ethernet, RTE profiles, IEC 61784, IEC 61158 Type 25, deterministic networking, performance indicators, CP 20/1, CP 20/2.