IEC 61158-5-4:2014

Overview

IEC 61158-5-4:2014 is an international standard published by the International Electrotechnical Commission (IEC) focusing on industrial communication networks, specifically fieldbus specifications. This part of the IEC 61158 series defines the application layer service definition for Type 4 elements within fieldbus communication systems. It details the services provided at the boundary between the user and the application layer (Fieldbus Application Layer - FAL), as well as between the application layer and Systems Management in the fieldbus reference model.

This second edition, published in 2014, replaces the first edition from 2007 and mainly involves editorial revisions and minor updates. The standard aligns with the OSI Basic Reference Model (ISO/IEC 7498-1) and the OSI application layer structure (ISO/IEC 9545), ensuring compatibility and interoperability within industrial communication protocols.

Key Topics

• Fieldbus Application Layer Services: Defines how the application layer communicates with users and systems management entities, specifying essential services and procedures for efficient data exchange.
• OSI Model Conformance: Incorporates OSI model principles to structure and standardize the communication framework ensuring worldwide interoperability.
• Type 4 Elements Specification: Focuses on the service definition for Type 4 elements incorporating client/server, pull, and push communication models.
• Architectural Relationships: Explores the positioning of the application layer within the overall fieldbus architecture, detailing naming, addressing, and service parameters.
• Service Procedures and Parameters: Includes technical specifications for request/response services, error handling, service confirmation, and attribute management at the application layer.
• Fieldbus Application Entity (AE) Structure: Describes the logical structuring of application entities and application service elements (ASE) and their interactions.
• Editorial Revisions: Enhancements for clarity and corrections in the previous edition, preserving the core technical content.

Applications

IEC 61158-5-4:2014 is essential for industries relying on fieldbus networks for real-time distributed control and automation. Its application spans:

• Manufacturing Automation: Enables robust communication protocols between industrial controllers and field devices.
• Process Control Systems: Supports reliable data exchange in chemical, oil and gas, and pharmaceutical process industries.
• Building Automation: Facilitates standardized communication contributing to smart building management.
• Systems Integration: Provides a foundational specification for integrating diverse industrial devices while maintaining conformity with international OSI standards.
• Network Management and Diagnostics: Assists system integrators and engineers in troubleshooting and managing industrial networks at the application layer effectively.

This standard supports industry-wide adoption of interoperable and scalable communication technologies vital for Industry 4.0 and Industrial Internet of Things (IIoT) frameworks.

Related Standards

• IEC 61158 Series: Other parts cover different layers and protocol types of fieldbus technology.
• IEC 61784-1 & IEC 61784-2: Define protocol profile specifications and authorized combinations of protocol types referenced for intellectual property rights in communication layers.
• ISO/IEC 7498-1: OSI Basic Reference Model standard referenced for structuring layers.
• ISO/IEC 9545: OSI application layer structure that underpins service definitions in IEC 61158-5-4.
• IEC 61131: For programmable controllers that interface with fieldbus networks, often used in conjunction with IEC 61158 standards.

Summary

IEC 61158-5-4:2014 delivers comprehensive international guidelines for the application layer services within Type 4 elements of fieldbus industrial networks. It ensures conformance to OSI standards while outlining architecture, services, and procedures for effective communication in industrial automation. This standard supports enhanced interoperability, reliability, and manageability of fieldbus communication systems critical to modern industrial environments.

Keywords: IEC 61158-5-4, industrial communication networks, fieldbus specifications, application layer, Type 4 elements, OSI model, fieldbus application layer, industrial automation, systems management, IEC standards, industrial networking