Overview
IEC 61158-5-2:2019 is an international standard developed by the International Electrotechnical Commission (IEC) that specifies the application layer service definition for Type 2 fieldbus elements within industrial communication networks. Aligning with the OSI Basic Reference Model (ISO/IEC 7498-1) and the OSI application layer structure (ISO/IEC 9545), this standard defines the structure, services, and mechanisms for effective data exchange and management in automated industrial environments, particularly where time-critical and non-time-critical messaging is required.
The standard is instrumental in ensuring interoperability and clear communication between automation system components, facilitating integration, reliability, and scalability in complex industrial processes.
Key Topics
IEC 61158-5-2:2019 covers several critical areas central to fieldbus-based industrial communication networks:
- Application Layer Service Definition: Defines the abstract services provided by the Type 2 fieldbus application layer (FAL), specifying how application programs access and utilize the fieldbus communication infrastructure.
- Structure of Type 2 Elements: Outlines the architecture and interrelationship of object-oriented Application Service Elements (ASEs), including management and communication ASEs.
- Time-Critical and Non-Time-Critical Communication: Details service characteristics supporting both high-priority, time-sensitive actions and standard operations.
- Service Actions, Events, and Parameters: Specifies primitive actions, parameters, and valid event sequences for application layer interactions.
- Boundary Interfaces: Describes services at the boundaries between user applications and the application layer, and between the application layer and Systems Management.
- Object Management: Includes object creation, deletion, and attribute management through formalized services.
- Recent Updates: This edition introduces updates such as new data types, clarifications and extensions to management and identity ASEs, and editorial improvements.
Applications
IEC 61158-5-2:2019 serves a variety of industries where robust and precise industrial communication is essential. The key applications include:
- Automated Manufacturing: Supports reliable communication between distributed controllers, sensors, and actuators in industrial automation systems.
- Process Control: Enables real-time data exchange for supervisory control and data acquisition (SCADA) systems in industries like oil & gas, chemical processing, and pharmaceuticals.
- Industrial Equipment Integration: Facilitates seamless integration of multi-vendor equipment using fieldbus protocols by establishing standardized communication services.
- System Management: Provides defined interfaces for effective systems management, improving asset visibility and operational efficiency.
- Safety and Reliability: Enhances operational safety by supporting time-critical messaging required for fail-safe operations.
By establishing common service definitions and interfaces, the standard streamlines system integration, reduces costs, and increases the flexibility of deployment in industrial communication networks.
Related Standards
To ensure comprehensive implementation and compatibility in industrial communication environments, IEC 61158-5-2:2019 references and is closely related to several key international standards:
- IEC 61158-1: Overview and guidance for fieldbus specifications
- IEC 61158-3-2: Data-link layer service definition for Type 2 elements
- IEC 61158-4-2: Data-link layer protocol specification for Type 2 elements
- IEC 61158-6-2: Application layer protocol specification for Type 2 elements
- IEC 61588: Precision clock synchronization protocol for networked measurement and control systems
- IEC 61784 series: Fieldbus profiles and additional specifications for functional safety
- ISO/IEC 7498-1: OSI Basic Reference Model
- ISO/IEC 9545: Application Layer Structure
These standards collectively form an integrated framework for standardized, high-performance industrial automation and communication networks.
Keywords: IEC 61158-5-2, industrial communication networks, fieldbus, application layer, Type 2 elements, automation, OSI reference model, time-critical messaging, systems management, industrial automation standards.
Open preview (PDF)Industrial communication networks - Fieldbus specifications - Part 5-2: Application layer service definition - Type 2 elements
