IEC 61158-5-19:2014

Overview

IEC 61158-5-19:2014 is an International Electrotechnical Commission (IEC) standard focused on industrial communication networks, specifically fieldbus systems. This part of the IEC 61158 series defines the application layer service for Type 19 fieldbus elements. Its purpose is to specify the services provided between the fieldbus application layer (FAL) user and the system, ensuring reliable, time-critical, and non-time-critical communication across automation environments.

This third edition introduces significant technical revisions, including a producer-consumer connection model, enhancements for timestamping, oversampling, improved redundancy, better error handling, and hotplug functionality. It is structured to align with the OSI Basic Reference Model (ISO/IEC 7498-1) and OSI application layer structure (ISO/IEC 9545), supporting interoperability and standardized communication in industrial automation.

Key Topics

• Application Layer Service Definition: Outlines the abstract service models offered by the fieldbus application layer, such as the definition of application resources (objects), actions, event parameters, and valid transaction sequences.
• Producer-Consumer Model: Introduces connection-based communication where data producers and consumers in automation systems interact more efficiently.
• Time-critical & Non-time-critical Communications: Enables both rapid (time-window specific) and general exchanges, critical for automation processes and system management.
• Hotplug & Redundancy: Improves network reliability by supporting device insertion/removal during live operation and strengthening network redundancy for continuous uptime.
• Error Handling & Phase Switching: Enhances how networks handle faults and transition between operational phases.
• Object-Oriented Service Elements: Defines the structure for application service elements (ASEs), promoting modular, object-based service interfaces.
• Data Types and Service Parameters: Specifies supported data types and utilizes templates for describing service behavior, ensuring deterministic communication.

Applications

IEC 61158-5-19 is key for vendors, integrators, and engineers involved in developing and maintaining fieldbus-based industrial automation systems. Its concrete applications include:

• Process Automation: Used in manufacturing industries for real-time control, monitoring, and data exchange among programmable logic controllers (PLCs), sensors, actuators, and field devices.
• Factory Automation: Facilitates robust and flexible communication in assembly lines, robotic workcells, and other discrete automation setups.
• System Integration: Provides standard mechanisms allowing devices from different manufacturers to interoperate, simplifying integration, migration, and maintenance.
• Network Management: Supports advanced features like diagnostics, device status monitoring, and live network modifications, essential for effective system operation and uptimes.
• Design of Industrial Communication Protocols: Serves as a reference for developing Type 19-compatible application protocols, helping solution providers align with international standards.

Related Standards

IEC 61158-5-19 is an integral part of a broader ecosystem of industrial communication standards. For comprehensive implementation and compatibility, consider these related documents:

• IEC 61158 Series: The overarching set of fieldbus specifications, encompassing various types and layers essential for industrial network communication.
• IEC 61158-1: Provides an overview and guidance for IEC 61158 and IEC 61784 series.
• IEC 61131-3: Defines programming languages used for programmable controllers in industrial automation.
• IEC 61784-1 and IEC 61784-2: Specify communication profiles and requirements for implementing fieldbus systems across industries.
• ISO/IEC 7498-1: The OSI Basic Reference Model, establishing the foundational concepts for layered communication protocols.
• ISO/IEC 9545: Details OSI application layer structure, which IEC 61158-5-19 references for compliance and architecture.

For reliable, interoperable, and future-ready automation systems in industrial settings, adherence to IEC 61158-5-19:2014 and associated standards is essential. These standards ensure efficient fieldbus communications, device compatibility, and long-term scalability in industrial communication networks.