Overview
EN IEC 61784-2-2:2023 (IEC 61784-2-2:2023) defines extensions to Communication Profile Family 2 (CPF 2) for Real‑Time Ethernet (RTE) used in industrial networks. It standardizes additional real‑time fieldbus profiles based on ISO/IEC/IEEE 8802-3 (Ethernet) and the IEC 61158 series (Type 2). The document was approved by CENELEC in May 2023 and forms part of the IEC 61784 profile series that guides interoperable real‑time communication for industrial control systems.
Key topics and requirements
- CPF 2 profiles: Specifies CP 2/2 (EtherNet/IP) and CP 2/2.1 (EtherNet/IP with time synchronization) including physical, data‑link and application layer selections.
- Protocol mappings: Defines which IEC 61158 Type 2 elements, IEEE 802.x protocols and Internet protocol suites (UDP/TCP/IP) are required or optional for each profile.
- Time synchronization: Addresses clocking and precision timing requirements (references IEEE 802.1AS and IEC 61588) for time‑sensitive applications.
- Performance indicators (PIs): Provides PI selection and calculation guidance (delivery time, throughput, maximum number of end‑stations) - Annex A contains PI calculation examples for profiles.
- Implementation profiles and features: Lists supported transport/encapsulation commands, implementation options and feature sets for Type 2 Ethernet transports.
- Normative references: Integrates related standards such as IEC 61158 series, IEC 61784‑1, IEEE 802.1Q, IEEE 802.1AS and common IETF RFCs relevant to Ethernet/IP stacks.
Applications and who uses it
EN IEC 61784-2-2:2023 is intended for:
- Industrial automation engineers designing deterministic Ethernet networks for factory automation and motion control.
- Device manufacturers implementing EtherNet/IP stacks and Type 2 fieldbus transports to ensure interoperability.
- System integrators and network architects planning RTE installations that require guaranteed latency, synchronization and throughput.
- Certification bodies and test houses verifying compliance with CPF 2 profiles and performance indicators.
Typical applications include controller-to-I/O communication, coordinated drives and motion systems, and time‑sensitive process control where precise synchronization and predictable delivery are required.
Related standards
- IEC 61158 series (Fieldbus specifications)
- IEC 61784‑1 / IEC 61784‑2‑0 (CPF 2 general concepts)
- IEEE 802.1AS / IEC 61588 (time synchronization)
- IEEE 802.1Q, IEEE 802.1AB (bridging, discovery)
- Relevant IETF RFCs (UDP/TCP/IP stack behavior)
EN IEC 61784-2-2:2023 is a practical profile specification for deploying interoperable, time‑sensitive Ethernet in industrial environments and should be used alongside the cited IEC/IEEE standards when implementing CPF 2 real‑time networks.