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.
Open preview (PDF)Industrial communication networks - Fieldbus specifications - Part 3-28: Data-link layer service definition - Type 28 elements