Control State Logging for Input-Linked Factor Analysis
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Solution Overview
Problem
Existing control systems in factory automation struggle to easily analyze the factors affecting the control state of control apparatuses, as collected control information does not allow for the identification of input information that influenced the control state, making it difficult to reproduce the input states and analyze the factors impacting the control state.
Innovation Solution
A control apparatus with a type identification unit to identify request types in input information, a state storage unit to associate device information and input information when the request type is preset, and a specification information storage unit to specify storage areas for device data, enabling the storage and analysis of factors affecting the control state.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If control information is collected from the control apparatus, then the control state can be checked, but the factors affecting the control state cannot be easily analyzed
Solution Approach 1:
The patent applies preliminary action by collecting and storing input information and device information before control state anomalies occur. The control information collection unit gathers input information from external devices and device information from internal storage areas in advance, storing them in association with each other. This allows post-event analysis of what factors led to control state changes without needing to reproduce the original input states.
Solution Approach 2:
The patent creates copies of the original input information and device states by storing them in the control information storage unit. Instead of trying to reproduce the original input states from control results, the system maintains duplicate copies of the actual input data and associated device states, enabling direct analysis of affecting factors without reconstruction.
2Difficulty of detecting and measuring
If all input information and device data are stored for analysis, then factor analysis becomes possible, but the system complexity and storage requirements increase
Solution Approach 1:
The patent extracts only the necessary input information and device information that are relevant to control state analysis. The control information collection unit selectively collects input information corresponding to specific storage areas and their associated device data, rather than storing all possible system data. This extraction approach enables factor analysis while keeping the system relatively simple by focusing on essential information only.
Solution Approach 2:
The patent segments the information storage into distinct components: input information storage areas, device data storage areas, and control information storage units that associate them. This segmentation allows the system to manage and analyze specific factors independently, reducing overall complexity by organizing data into manageable, purpose-specific segments rather than a monolithic storage system.
Data Source
AI summary
A type identification unit identifies a request type included in input information input from the outside of a control apparatus; and a state storage unit stores state information when the request type identified by the type identification unit is a preset request, the state information including device information and the input information associated with each other, the device information including device data stored in a storage area specified in specification information, the input information being input to the control apparatus.