IEC 61158-3-28:2023

Overview

IEC 61158-3-28:2023 is an international standard published by the International Electrotechnical Commission (IEC) focused on industrial communication networks. Specifically, it addresses fieldbus specifications related to the data-link layer service definition for Type 28 elements. This standard defines packet communication services and models designed for automation control within industrial field environments.

Type 28 data-link layer services support both time-critical and non-time-critical communication, ensuring that functions between devices are completed within defined time windows. The completion of these time-sensitive tasks is essential to avoid failures or hazards during industrial production processes.

Key Topics

• Data-Link Layer Services (DLS): Type 28 defines various communication modes including connection-oriented and connectionless data transmissions with different acknowledgement and response mechanisms.

• Time-Critical Communication: Emphasizes stringent timing requirements essential for synchronizing automation devices to maintain safety and operational integrity.

• Service Primitives and Parameters: The standard details the primitives for different communication scenarios such as:

  • Connection-less mode with acknowledge (CLMDTA)
  • Connection-less mode without acknowledge (CLMDTNA)
  • Request-response modes with or without acknowledge (CLMDTRA, CLMDTRRNA)
  • Connection mode with and without acknowledge (CMDTA, CMDTNA)

• Data-Link Management Services: Comprehensive mechanisms for configuration, discovery, maintenance, establishment, release, and update of data-link connections are defined, improving manageability and robustness.

• Synchronization and Delay Measurement: Features for clock synchronization, clock interrupts, and delay measurement services help guarantee the timely exchange of data.

• Model and Reference Terms: The standard includes detailed definitions, symbols, and abbreviations accommodating clear understanding of the data-link service model, enabling consistent implementation.

Applications

IEC 61158-3-28:2023 is critical for industries where reliable and timely communication between automation devices is paramount. Key application sectors include:

• Manufacturing Automation: Ensuring seamless communication across sensors, controllers, and actuators on the factory floor.

• Process Control: Managing time-critical operations in chemical plants, oil refineries, and similar process industries.

• Robotics and Machine Tools: Enabling reliable control and coordination of robotic arms and machine tools that require precise timing.

• Energy and Utilities: Supporting communication for monitoring and control systems in power generation and distribution networks.

• Safety Systems: Facilitating real-time data exchange vital to safety interlocks and emergency shutdown systems.

By standardizing data-link layer communication, IEC 61158-3-28 enhances interoperability, reduces integration complexity, and improves network reliability in industrial automation environments.

Related Standards

• IEC 61158 Series: Covers multiple parts and types of fieldbus communication protocols at different OSI layers, offering comprehensive industrial network standards.

• IEC 61784: Focuses on profile specifications for industrial communication networks including fieldbus and real-time Ethernet profiles.

• IEC 61850: Pertains to communication networks and systems for power utility automation, with some overlapping communication requirements.

• IEEE 802.xx Standards: Include general network protocols such as Ethernet, providing a complementary framework for industrial communication.

Adherence to IEC 61158-3-28 ensures compatibility with these related standards, supporting integrated and scalable industrial communication solutions.

Keywords: IEC 61158-3-28, industrial communication networks, fieldbus specifications, data-link layer, Type 28 elements, time-critical communication, automation control, field environment, packet communication, real-time industrial communication, data-link management services, clock synchronization, industrial automation standards.