Multi-Layer Relay Device for Factory Automation Network Topology
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Solution Overview
Problem
Conventional factory automation (FA) networks with a single-layer configuration cannot recognize connection relations between slave stations across multiple layers, hindering the generation of comprehensive network connection information.
Innovation Solution
A relay device is introduced to connect multiple hierarchized networks, storing connection information that specifies the network layer for each communication device, allowing it to relay signals and generate connection information across multiple layers.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single-layer network configuration is used, then the network structure is simple, but the master station cannot recognize connection relations between slave stations across multiple layers
Solution Approach 1:
The patent introduces a hierarchical dimension to the network structure by adding relay devices that operate at different layers (first relay device at upper layer, second relay device at lower layer). This multi-layer hierarchical structure enables the system to recognize and manage connection relations across different network levels, transforming a flat single-layer network into a structured multi-layer network that preserves connection information.
Solution Approach 2:
Relay devices serve as intermediary components between the master station and slave stations in multi-layer networks. The first relay device relays communication between the master station and the second relay device, while the second relay device relays between the first relay device and slave stations. These intermediaries enable the master station to indirectly recognize connection relations across multiple layers through structured relay communication.
2Loss of information
If relay devices are added to support multi-layer networks, then connection relations across layers can be recognized, but the device complexity increases
Solution Approach 1:
The patent segments the multi-layer network management function into distinct relay devices operating at different layers. The first relay device handles communication at the upper layer, while the second relay device handles communication at the lower layer. This segmentation allows each relay device to manage specific layer connections independently, making the overall complex system manageable through modular functional division.
Solution Approach 2:
By organizing relay devices into a hierarchical structure with clear layer assignments, the patent transforms the complexity management problem into a dimensional organization problem. Each relay device operates within its designated layer dimension, and the hierarchical arrangement provides a systematic framework for managing connection information across layers, reducing the perceived complexity through structured organization.
Data Source
AI summary
A relay device is connected to two networks of a plurality of layered networks and connected to a first communication device directly under a first lower layer network that is on a lower level of the two networks. The relay device includes a storage unit that stores connection information including model identification information associated with each of a second communication device and the first communication device and information on the number of connected second communication devices or on a memory area assigned to each of the first communication device and the second communication device, the second communication device being connected to a lower side through a second lower layer network that is situated lower than the first lower layer network, the connection information being arranged in a format capable of specifying a layer of a network to which each communication device is connected.