IEC 62541-13:2015

Overview

IEC 62541-13:2015 is a critical part of the OPC Unified Architecture (OPC UA) standard series, specifically addressing the definition of Aggregates within the OPC UA information model. Published by the International Electrotechnical Commission (IEC), this standard outlines how aggregate data-such as averages, minimums, and maximums-should be modeled, accessed, and processed within OPC UA enabled systems.

This standard provides a structured and consistent method to represent aggregates of monitored data, facilitating advanced data analysis and monitoring capabilities in industrial automation, energy management, and related fields. As part of IEC's internationally recognized framework, IEC 62541-13 supports interoperability and reliable data exchange across heterogeneous systems.

Key Topics

• Aggregate Information Model: Defines the architecture for representing various aggregate functions and their attributes systematically. This includes general object types and function-specific objects that model how aggregate data is computed and stored.

• Aggregate Functions: Includes common aggregate types such as Average, Total, Minimum, Maximum, Range, and their variants. Each function covers descriptive attributes, calculation methods, and proper data handling techniques aligned with OPC UA services.

• MonitoredItem AggregateFilter: Specifies filtering mechanisms used when subscribing to monitored data items to obtain aggregate computations. Default settings and bounding values ensure precise data retrieval.

• Service Usage for Aggregates: Details the manner in which OPC UA services - such as Read, HistoryRead, and Subscribe - interact with aggregate data. This section emphasizes the handling of aggregate-specific status codes, error handling, and operation-level results.

• Historical Access Examples: Includes detailed annexes with practical examples demonstrating aggregate data usage in historian applications and interpolative data computations. These examples guide implementers in real-world deployment scenarios.

Applications

IEC 62541-13:2015 is invaluable for industries requiring robust and standardized data aggregation models within their automation and control systems. Key applications include:

• Industrial Automation: Enables reliable collection and processing of aggregate data for process monitoring, control optimization, and fault detection.

• Energy Management Systems: Supports aggregation of power consumption and production data for efficient energy use analysis and reporting.

• Historical Data Analysis: Facilitates standardized retrieval and interpretation of performance metrics over time through OPC UA historians.

• Condition Monitoring: Provides a framework for tracking equipment states via aggregates such as duration in specific operational states and number of state transitions.

• IoT and Smart Manufacturing: Assists in seamless integration of sensor data aggregation into IoT platforms leveraging OPC UA interoperability.

By implementing IEC 62541-13, organizations can ensure data consistency, reduce integration complexity, and improve decision-making driven by insightful aggregated data.

Related Standards

IEC 62541-13:2015 is part of the comprehensive IEC 62541 OPC Unified Architecture series, which includes:

• IEC 62541-1: Overview and Concepts of OPC UA.
• IEC 62541-5: Information Model - Core OPC UA object and variable models.
• IEC 62541-6: Mappings - Specifies protocol mappings for OPC UA communication.
• IEC 62541-9: Alarms and Conditions - Defines models for alarm management.
• IEC 62541-10: Programs - For representing executable logic.
• IEC 62541-14: PubSub - Describes publish-subscribe messaging models.

These complementary parts ensure end-to-end standardization of data exchange, event handling, and system interoperability across complex automation environments.

Keywords: IEC 62541-13, OPC Unified Architecture, OPC UA Aggregates, industrial automation, energy management, data aggregation, monitored items, AggregateFilter, historical data access, IEC standards, interoperability, process control, condition monitoring, OPC UA standard.