Coupler Protocol Translation for Automation Bus Systems
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Solution Overview
Problem
Current fieldbus systems lack flexibility in integrating Ethernet-based networks with local bus systems, particularly in automation systems, where different protocols and transmission physics can lead to inefficiencies in data transmission and processing.
Innovation Solution
A method is introduced that involves a coupler to receive Ethernet telegrams, extract process data and identifiers, and generate local bus telegrams with specific headers and payloads, allowing for flexible communication between Ethernet-based networks and local bus systems, even with different protocols, and enabling efficient data transmission to local bus users.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a processing device is used to convert Ethernet telegrams to ring-type transmission path telegrams, then compatibility between different transmission physics is improved, but device complexity increases
Solution Approach 1:
The patent extracts only the necessary process data from Ethernet telegrams and transmits them via the ring-type transmission path, removing unnecessary Ethernet-specific header information. This selective extraction reduces the need for complex processing while maintaining compatibility between different transmission physics.
Solution Approach 2:
The patent applies different processing approaches to different parts of the data: Ethernet headers are extracted and discarded, while only the relevant process data payload is retained and transmitted through the ring topology. This localized processing reduces overall device complexity.
2Productivity
If Ethernet headers and control data are extracted and only payload data is transmitted, then transmission efficiency is improved, but information completeness deteriorates
Solution Approach 1:
The patent extracts and discards Ethernet headers and control data that are not needed for the ring-type transmission path, retaining only the essential process data payload. This selective extraction improves transmission efficiency by reducing data size while maintaining the essential information needed for process control.
Solution Approach 2:
The coupler acts as an intermediary that translates Ethernet telegrams into a simplified format suitable for the ring-type transmission path, converting control-heavy Ethernet data into efficient process data transmissions without losing essential process information.
3Adaptability or versatility
If different fieldbus protocols are supported through a coupler, then system versatility is improved, but protocol conversion complexity increases
Solution Approach 1:
The patent extracts only the essential process data from various fieldbus protocols and transmits them through a unified ring-type interface, removing protocol-specific overhead and control data. This approach enables multi-protocol support while keeping the conversion mechanism simple and uniform.
Solution Approach 2:
The coupler is designed with universal functionality to handle multiple fieldbus protocols (PROFIBUS, PROFINET, EtherCAT, etc.) by extracting and transmitting only the common process data elements, making the system versatile without requiring complex protocol-specific processing for each protocol type.
Data Source
AI summary
A method for operating a bus system of an automation system, wherein the bus system has an Ethernet-based network and a coupler and a local bus and a local bus user. An Ethernet telegram is received via the Ethernet-based network at the coupler, wherein the Ethernet telegram has an identifier associated with a fieldbus protocol wherein the Ethernet telegram has process data, conforming to the fieldbus protocol, for the local bus user. The process data is acquired and the identifier from the Ethernet telegram by the coupler. A local bus telegram is generated by the coupler, wherein the local bus telegram has a local-bus-specific local bus header and a local bus payload section. The process data is inserted, together with the identifier, into the local bus telegram by the coupler. The local bus telegram is transmitted from the coupler to the local bus user.