Ethernet Telegram Data Extraction for Field-Level Process Variables
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Solution Overview
Problem
Existing field bus systems in automation technology have relatively low transfer rates, leading to long transmission times for complex field devices, especially during parametrization and configuration, and when transmitting large sets of measurement data.
Innovation Solution
A device that extracts user data from Ethernet telegrams sent by field devices, allowing user data to be viewed at the field level of a plant. The device includes an input interface for receiving Ethernet telegrams, an electronics unit for evaluating and extracting process variables, and an output unit for displaying or outputting these variables.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Speed
If field bus systems are used for data transmission, then device compatibility and established protocols are maintained, but transfer rates are low and transmission times are long
Solution Approach 1:
The device acts as an intermediary component inserted into the Ethernet data line between the field device and the higher-level unit. It taps into the Ethernet telegrams passing through the data line, extracts user data portions without interrupting the main data flow, and outputs the extracted data locally. This mediator approach enables fast Ethernet-based transmission while providing local data access capability.
Solution Approach 2:
The device extracts specific user data portions from the complete Ethernet telegrams transmitted over the data line. By separating the user data extraction function from the main data transmission path, the system achieves high-speed transmission while enabling local access to specific data elements without requiring the entire telegram to be processed or routed through additional components.
2Productivity
If user data are made viewable at field level, then operational efficiency is improved and transmission times are reduced, but device complexity increases
Solution Approach 1:
The device automatically performs data extraction and output without requiring configuration, addressing, or manual setup. It autonomously identifies and extracts user data portions from passing Ethernet telegrams and makes them available at the field level. This self-service capability simplifies installation and operation while providing advanced functionality.
Solution Approach 2:
The device is designed to work with any field device communicating via Ethernet without requiring specific configuration for different device types. It universally extracts user data portions from standard Ethernet telegrams, making it applicable across multiple applications and device types while maintaining simple operation.
3Speed
If Ethernet data lines are used instead of field buses, then transfer rates are improved, but infrastructure costs and system complexity increase
Solution Approach 1:
The device segments the Ethernet telegram data stream by identifying and separating user data portions from the complete telegram structure. This segmentation allows the system to maintain high-speed Ethernet transmission while extracting and processing only the relevant user data locally, reducing the complexity of data handling at the field level.
Data Source
AI summary
A device for the extraction of user data out of Ethernet telegrams sent from a field device comprises an input interface and an output interface for connecting to an Ethernet data line, wherein the input interface is designed to receive Ethernet telegrams transmitted via the Ethernet data line; an electronics unit which is designed to evaluate the received Ethernet telegrams and to extract a value of at least one process variable out of the user data portions of the received Ethernet telegrams; and an output unit for outputting the determined process variables. The invention also relates to a system comprising the device according to the invention.