IEC 61158-5-19:2019 PDF

Overview

IEC 61158-5-19:2019 is an international standard published by the International Electrotechnical Commission (IEC) that is part of the IEC 61158 series on industrial communication networks and fieldbus specifications. Specifically, this standard defines the services provided to the Fieldbus Application Layer (FAL) user at the boundary between the application layer and the user, as well as systems management interfaces in industrial automation systems. IEC 61158-5-19:2019 covers Type 19 elements within the application layer service definition, structuring its protocols in alignment with the OSI Basic Reference Model (ISO/IEC 7498-1) and the OSI application layer structure (ISO/IEC 9545).

This fourth edition includes technical advancements in hotplug and redundancy, improvements in phase switching and error handling, and editorial updates. The standard plays a crucial role in supporting time-critical and non-time-critical messaging within industrial environments, providing a flexible and robust framework for fieldbus communications.

Key Topics

• Application Layer Service Definition Specifies the abstract services at the boundary between the user and application layer. These services enable interactions between automation system components in both time-critical and routine operations.

• Object-Oriented Approach Utilizes Application Service Elements (ASEs) to define and manage resources (objects) accessible via the fieldbus, supporting a range of application process object (APO) classes.

• Improved Features

  • Enhanced hotplug capability, allowing devices to be added or removed during operation without network downtime.
  • Improved redundancy features, ensuring higher reliability and resilience.
  • Advanced phase switching and error handling mechanisms to boost system performance.

• Interoperability and Migration Provides a path for integrating existing industrial communication protocols, allowing easier migration to modern fieldbus solutions.

• Service Model and Conventions Offers a clear framework for defining attributes, primitives, and events involved in fieldbus application layer communication.

Applications

IEC 61158-5-19:2019 is vital in various industrial sectors where real-time and reliable communication is fundamental, including:

• Industrial Automation and Process Control Facilitates the safe and timely exchange of information between programmable controllers, sensors, actuators, and field devices. It ensures that both critical processes and standard operations can be managed effectively.

• Manufacturing Systems Ensures seamless data communication for automation equipment, machinery, and manufacturing execution systems, supporting efficient production with high system uptime.

• Plant Floor Integration Used in integrating diverse fieldbus devices and control networks, enhancing system compatibility and long-term investment protection.

• Flexible Network Management Enables dynamic network changes with features such as hotplug, minimising operational disruptions during device replacement or expansion.

By supporting both scheduled (time-critical) and unscheduled (non-time-critical) communications, this standard underpins robust and reliable industrial network architectures.

Related Standards

IEC 61158-5-19:2019 should be considered alongside several related standards for a comprehensive industrial communication solution:

• IEC 61158-1 - Overview and guidance for the IEC 61158 and IEC 61784 series.
• IEC 61158-4-19 - Data-link layer protocol specification for Type 19 elements.
• IEC 61784-1 & IEC 61784-2 - Profiles for fieldbus and reliability enhancements.
• ISO/IEC 7498-1 - OSI Basic Reference Model.
• ISO/IEC 9545 - Application Layer Structure.
• IEC 61131-3 - Programmable controllers and programming languages.

Understanding and implementing IEC 61158-5-19:2019 in conjunction with these standards will ensure compatibility, flexibility, and international best practices in industrial communication network deployments.