IEC 61784-2:2014

Overview

IEC 61784-2:2014 is an international standard published by the International Electrotechnical Commission (IEC) that focuses on industrial communication networks. Specifically, it addresses additional fieldbus profiles for real-time networks that are based on ISO/IEC 8802-3 or IEEE 802.3 standards. This third edition of IEC 61784-2 represents a technical revision that updates and expands the classification schemes and performance indicators supporting Real-Time Ethernet (RTE) requirements. RTE communication profiles defined in this document ensure that industrial networks can handle real-time communications alongside standard Ethernet applications seamlessly.

Key Topics

Real-Time Ethernet Communication Profiles
IEC 61784-2:2014 defines several RTE communication profiles. These profiles pertain to network components and specifications that enable deterministic and timely data exchange, crucial for industrial automation processes.

Performance Indicators and Classification Scheme
The standard outlines key performance indicators such as:

• Delivery time
• Number of RTE end-stations
• Network topology and number of switches involved
• Throughput specific to RTE versus non-RTE bandwidth
• Accuracy of time synchronization
• Redundancy recovery time

These parameters help classify and benchmark various real-time Ethernet solutions to ensure they meet industrial application needs.

Communication Profile Families (CPF)
The document expands and updates numerous Profile Families (CPF), such as:

• CPF 3 (PROFIBUS & PROFINET) with updated selection tables
• CPF 11 and CPF 14 enhancements
• Introduction of new profiles in CPF 11 and CPF 14
• Addition of a new Communication Profile Family - CPF 8

Each CPF covers a set of technical specifications for physical, data-link, and application layers tailored to different industrial environments.

Conformance and Testing Methodology
IEC 61784-2 defines a robust methodology for conformance testing to ensure that products meet the specified profile requirements. This includes test conditions, procedures, performance measurements, and reporting formats to guarantee interoperability and reliable performance.

Applications

IEC 61784-2:2014 is widely used across various industrial sectors that require reliable, real-time communication over Ethernet networks, including:

• Manufacturing Automation: Ensuring deterministic control communication within factory automation systems like assembly lines, robotics, and process control.
• Process Industry: Supporting critical monitoring and control systems in industries such as chemicals, oil & gas, and pharmaceuticals where precise timing and synchronization are vital.
• Energy and Utilities: Managing substation automation and smart grid applications where real-time data exchange ensures system stability and security.
• Transportation and Infrastructure: Facilitating control systems in railways, automotive production, and airport logistics which rely on synchronized and fault-tolerant communication.

The standard promotes interoperability among network devices and supports parallel operation with existing ISO/IEC 8802-3 Ethernet applications, aiding gradual migration towards real-time industrial Ethernet solutions.

Related Standards

For comprehensive industrial network implementation, IEC 61784-2:2014 is often used in conjunction with:

• ISO/IEC 8802-3 / IEEE 802.3: Base standards for Ethernet physical and data-link layers, forming the foundation for RTE profiles.
• IEC 61158 series: Defines fieldbus communication protocols that complement real-time Ethernet networking and integration.
• IEC 61784-1: Outlines general communication profile specifications forming the baseline framework for industrial network design.
• IEC 61850: Used in power utility automation, supports real-time Ethernet communication in electrical substation environments.

Together, these standards ensure industrial communication networks are robust, interoperable, and meet demanding real-time performance requirements.

Keywords: IEC 61784-2, Real-Time Ethernet, Industrial communication networks, fieldbus profiles, ISO/IEC 8802-3, IEEE 802.3, PROFIBUS, PROFINET, real-time networks, industrial automation, deterministic Ethernet, conformance testing, communication profile families