Reference Device for Redundant Automation Addressing
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Solution Overview
Problem
Conventional redundant automation systems require special implementation in subscribers for address management and connection switching, making it difficult for subscribers unaware of the HA system to maintain connectivity when one automation device fails.
Innovation Solution
A reference device with a reference address connected to the field bus is introduced, which activates connection paths between automation components and recognizes failures, allowing seamless switching to the secondary automation device without requiring address management in subscribers, enabling any subscriber to connect using a fixed reference address.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a redundant automation system uses dedicated IP addresses for each automation device, then the system achieves high availability through failover capability, but subscribers must implement special address management mechanisms to maintain connectivity during failures
Solution Approach 1:
The patent introduces a reference device as an intermediary component that mediates between subscribers and the redundant automation devices. This reference device maintains a mapping between a fixed reference address and the current active automation device's address, automatically updating this mapping when failover occurs. Subscribers simply communicate with the reference device using the fixed address, eliminating the need for them to implement complex address management while preserving high availability through automatic failover transparency.
2Reliability
If subscribers are configured with multiple IP addresses for redundancy, then they can maintain connectivity during automation device failures, but this requires special implementation of address management in each subscriber
Solution Approach 1:
The reference device serves as a mediator that consolidates the address management functionality externally. Instead of requiring each subscriber to be configured with multiple addresses and implement failover logic, the reference device presents a single fixed reference address to all subscribers and internally manages the mapping to active automation devices. This approach maintains connection availability while dramatically simplifying subscriber configuration and operation.
Solution Approach 2:
The patent extracts the address management complexity from the subscribers and centralizes it in the reference device. The reference device takes out the burden of tracking and switching between multiple automation device addresses, while subscribers only need to know the single reference address. This extraction of complexity improves ease of operation for subscribers while maintaining the reliability benefits of redundancy.
3Adaptability or versatility
If the system uses a fixed reference address for all automation components, then any subscriber can connect without knowledge of the HA system, but the reference device must actively manage connection paths and detect failures
Solution Approach 1:
The reference device acts as an intermediary that handles the complexity of path management and failure detection internally. It maintains a fixed reference address that all subscribers can use, while the reference device itself monitors the health of automation devices and dynamically updates its internal routing tables. This approach maximizes subscriber compatibility and adaptability while concentrating the necessary complexity in the reference device, which is designed specifically to handle these management functions.
Data Source
AI summary
Redundant automation system and method for the operation thereof in which a reference device is used to provide simplified addressing of a main automation device and a substitute automation device in the redundant automation system for controlling a technical apparatus, where the reference device is configured to activate a first connection path between further automation components, which are connected to the field bus, and the first automation device, and is furthermore configured to recognize a failure of the first automation device and thereupon to activate a second connection path between the further automation components, which are connected to the field bus, and the second automation device.