IEC 61804-3:2020

Overview

IEC 61804-3:2020 is an international standard published by the International Electrotechnical Commission (IEC) that defines the syntax and semantics of the Electronic Device Description Language (EDDL). As part of the IEC 61804 series focused on devices and integration in enterprise systems, this standard specifically addresses how EDDL is used to describe automation system components in a generic and interoperable way. The fourth edition of this standard consolidates previous EDDL specifications from multiple organizations (FieldComm Group, PROFIBUS Nutzerorganisation, ISA100 Wireless Compliance Institute), ensuring coherent syntax and semantics for device descriptions in process control environments.

This standard is essential for system integrators, device manufacturers, and software tool developers involved in the engineering life cycle of industrial automation solutions. It enables integration of detailed real product data into system tools, supporting configuration, operation, calibration, simulation, monitoring, and maintenance of devices like sensors, controllers, remote I/Os, and programmable logic controllers (PLCs).

Key Topics

• Generic EDDL Language: Describes device properties including parameters, dependencies, device functions (e.g., simulation modes, calibration), and interactions with control devices.
• Graphical Representations: Supports enhanced user interfaces with graphical menus, charting systems, and device function visualization.
• Persistent Data Storage: Defines models for storing device data safely and consistently for use across engineering tools.
• EDD Structure and Development: Specifies the architecture and development process of Electronic Device Descriptions (EDDs), including source generation, preprocessing, and compilation.
• Lexical and Semantic Model: Provides a syntax-independent semantic model with an optionally defined specific syntax, ensuring flexibility in implementation.
• Profiles and Built-in Libraries: Describes standard profiles for various fieldbuses and built-in language elements enhancing interoperability.
• Advanced Data Modeling: Details complex constructs such as VARIABLE lists, collections, arrays, commands, methods, and response codes critical in describing device behavior and data.
• New Technical Features: Includes recent additions like new communication profiles (ISA100, GPE), EDIT_DISPLAY attributes (LAYOUT_TYPE), semantic mapping constructs, and extended list functionalities.

Applications

IEC 61804-3:2020 finds practical application across a broad spectrum of industrial automation sectors, including:

• Device Integration: Enables manufacturers to create standardized device descriptions that multiple system tools can interpret, facilitating plug-and-play capabilities.
• Process Control Engineering: Assists engineering teams in developing, configuring, and commissioning automation systems more efficiently.
• Interoperability: Supports communication and data exchange between devices from different vendors using common fieldbus protocols (FOUNDATION Fieldbus, HART, PROFIBUS, ISA100 Wireless).
• Software Tool Development: Provides the basis for software vendors to implement EDDL interpreters enabling device parameter handling, diagnostics, and monitoring.
• Maintenance and Calibration: Facilitates remote diagnostics, simulation, and calibration procedures through detailed electronic descriptions.
• Enhanced User Interfaces: Enables creation of advanced graphical interfaces, improving operator interaction with devices and process data for better decision making.

Related Standards

IEC 61804-3:2020 is part of a comprehensive family of standards addressing function blocks and device description languages:

• IEC 61804-4: Specifies the interpretation of EDDs to support interoperability among EDDL applications and devices.
• IEC 61804-5: Defines the built-in library for EDDL and profiles for various fieldbus communication systems.
• IEC 61804-1 & IEC 61804-2: Address function blocks for process control and system integration architecture.
• Fieldbus and Wireless Protocol Standards: Such as FOUNDATION Fieldbus, HART, PROFIBUS, and ISA100 Wireless that complement EDDL for device communications.

When combined, these standards streamline device integration and interoperability in industrial automation systems, reducing engineering effort and improving system reliability.

Keywords: IEC 61804-3, Electronic Device Description Language, EDDL syntax, device integration, process control, automation system components, function blocks, device parameters, graphical user interface, device description, interoperability, fieldbus profiles, ISA100, FOUNDATION Fieldbus, HART, PROFIBUS, industrial automation standards.