Field Device Parameter History for Automatic Malfunction Correction
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Solution Overview
Problem
Field devices in automation technology often malfunction due to incorrect parameterization, leading to the loss of configuration settings and requiring a reset to the delivery status, which disrupts operation and necessitates manual restoration of parameters.
Innovation Solution
A method that monitors parameter changes and malfunctions, storing them in a parameter change history and using a parameter-error logic element to offer automatic corrective measures, allowing for the selection and resetting of parameter changes to restore functionality.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If parameter changes are allowed on field devices, then device functionality and adaptability are improved, but the risk of malfunctions and loss of configuration settings increases
Solution Approach 1:
The system performs preliminary actions by automatically saving parameter changes to a parameter change history before malfunctions occur. This proactive approach ensures that configuration data is preserved and can be restored if needed, resolving the contradiction between allowing parameter changes and maintaining configuration stability.
Solution Approach 2:
The system implements feedback mechanisms by monitoring parameter changes and malfunctions, automatically saving changes to history, and providing corrective measures when malfunctions occur. This closed-loop approach allows the system to adapt to changes while maintaining reliability through automatic restoration capabilities.
2Ease of operation
If parameter changes are made and then a malfunction occurs, then manual restoration is required, but this results in loss of subsequent settings and extended downtime
Solution Approach 1:
The system performs self-service by automatically monitoring parameter changes, saving them to a parameter change history, and providing automatic corrective measures when malfunctions occur. This eliminates the need for manual parameter restoration and reduces operational downtime, as the system can autonomously restore settings without requiring service calls.
Solution Approach 2:
The system takes preliminary action by pre-saving parameter changes to a history database before malfunctions occur. This ensures that restoration data is already prepared and available, allowing for immediate restoration when malfunctions occur, thereby minimizing downtime and eliminating manual restoration efforts.
3Extent of automation
If all parameter changes are saved in a parameter change history, then automatic corrective measures become possible, but device complexity and data storage requirements increase
Solution Approach 1:
The system achieves self-service through automatic monitoring of parameter changes and malfunctions, saving changes to a parameter change history, and providing automatic corrective measures. This automation reduces the need for manual intervention and simplifies the overall system operation, offsetting the increased device complexity with reduced operational burden.
Data Source
Figure 1
AI summary
The invention relates to a method for maintaining the functionality of a field device in automation technology, the method providing the following steps: - monitoring the field device for at last one parameter change (Δnx) undertaken, wherein an old parameter set (nx-1) is modified by the parameter change (Δnx) to form a new parameter set (nx); - storing all parameter changes (Δnx) undertaken on the field device in a parameter change history (PH); - monitoring the field device for a malfunction (F) that occurs; - performing a corrective measure (BM), wherein the parameter change history (PH) and/or a parameter error link element (VE) is accessed for correcting the malfunction (F) that has occurred on the field device.