Control Program Backup Using Integrated Change Detection
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Solution Overview
Problem
Existing solutions for backing up information in industrial systems require either a separate data management device or mechanisms for receiving notifications of changes in device setting information, which can complicate the configuration and operation.
Innovation Solution
A control device that includes a storage for information controlling an object and a change detector to identify changes in the stored information, allowing for automatic backup processing during operation without the need for additional devices or complex notification mechanisms.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a separate data management device is used to back up control programs, then backup reliability is improved, but device complexity increases
Solution Approach 1:
The patent combines the backup function with the control device itself, merging what were previously separate functions (control + backup) into a single integrated system. The control device now includes both control processing capabilities and backup processing capabilities, eliminating the need for a separate data management device while maintaining backup reliability.
Solution Approach 2:
The control device is designed to perform multiple functions: it can execute control programs for controlling the object and simultaneously perform backup processing of these programs. This multi-functional design allows the single device to replace both the control device and the separate data management device, reducing system complexity while maintaining backup capabilities.
2Device complexity
If the PLC backs up device setting information without using another device, then device complexity is reduced, but the PLC needs notification mechanisms from external devices
Solution Approach 1:
The control device performs backup processing autonomously without requiring notification from external devices. The backup execution unit automatically executes backup when the control program is updated, eliminating the need for notification mechanisms from external devices while maintaining simple operation.
Solution Approach 2:
The system uses a change detector to monitor for changes in the control program and provides feedback to the backup execution unit. When a change is detected, the backup execution unit automatically triggers the backup process, creating a self-regulating system that doesn't require external notifications.
3Productivity
If automatic backup processing is executed during operation, then productivity is improved, but device complexity increases
Solution Approach 1:
The system performs backup processing during operation rather than waiting for operation to complete. By executing backup in advance or concurrently with control operations, the system improves productivity without requiring separate post-operation backup steps, and the integration keeps complexity manageable.
Data Source
AI summary
Information is backed up with a simple configuration. A control device that controls an object, the control device includes: a storage configured to store information controlling the object; and a change detector configured to detect that information in the storage is changed, in which the control device executes backup processing of the information stored in the storage when the change detector detects that the information in the storage is changed during operation.