Overview
IEC 61158-3-19:2014 is an international standard published by the International Electrotechnical Commission (IEC) that defines the data-link layer service for Type 19 fieldbus elements within industrial communication networks. This third edition, a technical revision from the 2010 edition, enhances the communication protocols essential for time-critical messaging in automation environments. The standard specifies the services provided at the boundary between the application and data-link layers as well as between the data-link layer and system management, ensuring reliable and efficient data transfer within industrial fieldbus systems.
Key Topics
- Time-Critical Messaging: The standard focuses on supporting time-critical communications, where operations must be completed within defined time windows to prevent failures in automation systems, safeguarding equipment and human safety.
- Producer-Consumer Model: Introduction of connection mechanisms based on the producer-consumer model to optimize data flow between devices.
- Advanced Features: Incorporation of additional mechanisms like timestamping and oversampling to improve data accuracy and synchronization.
- Hotplug and Redundancy Improvements: Enhancements to support device hotplugging and network redundancy, increasing system robustness and uptime.
- Phase Switching and Error Handling: Improved protocols for phase switching and error management, enabling seamless operation and fault tolerance.
- Service Definition: Clear specification of primitive actions, associated parameters, and valid sequences critical to consistent data-link layer communication.
- Abstract Architecture: The standard defines services as conceptual architectural elements, independent of implementation, guiding the development of compliant communication protocols.
Applications
IEC 61158-3-19:2014 is pivotal for industries relying on automated control and monitoring systems where reliable and time-sensitive communication is paramount, including:
- Manufacturing Automation: Ensuring synchronized control and monitoring of machinery with minimal communication delays.
- Process Control: Supporting continuous real-time data exchange in chemical, oil, and gas processing plants where timing precision affects safety and quality.
- Industrial Network Devices: Guiding the development of network devices such as fieldbus controllers, gateways, and sensors that communicate under strict timing constraints.
- System Management: Facilitating system-wide management functions including network health monitoring, error notification, and device hotplugging without interrupting critical operations.
- Safety-Critical Systems: Providing communication protocols that help prevent failures in systems where human safety and equipment integrity are at risk.
Related Standards
IEC 61158-3-19:2014 is part of the broader IEC 61158 series addressing fieldbus specifications for industrial communication networks. Relevant related standards include:
- IEC 61158-1: Defines the general fieldbus reference model layers, including the application, data-link, and physical layers.
- IEC 61784-1 and IEC 61784-2: Specify combinations of protocol types and profiles for industrial communication, indicating compatibility and implementation rules alongside IEC 61158 protocols.
- OS-OSI Model: The Open Systems Interconnection (OSI) basic reference model, which IEC 61158 supplements by specifying industrial data-link layer services.
Summary
IEC 61158-3-19:2014 provides a vital framework for designing and implementing data-link layer services tailored to Type 19 fieldbus elements in industrial communication networks. By establishing rigorous requirements for time-critical messaging, introducing advanced communication mechanisms, and promoting robust system management, this standard underpins the reliability and efficiency of automation and control systems worldwide. Adherence to IEC 61158-3-19 ensures interoperability, safety, and high performance in complex industrial environments, making it an essential reference for engineers and manufacturers developing fieldbus communication technologies.
Open preview (PDF)Industrial communication networks - Fieldbus specifications - Part 3-19: Data-link layer service definition - Type 19 elements
