Supervisory Control Screen for Fast Input-Output Fault Tracing
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Solution Overview
Problem
Existing control systems face challenges in quickly identifying the cause of unintended system shutdowns, as the support device is often not connected to the control device during facility operations, leading to increased time and effort in troubleshooting.
Innovation Solution
A control system that includes a support device capable of extracting the relationship between output and input signals defined by a user program, generating input-output correspondence information, and transmitting it to a display device. The display device then provides a supervisory control screen showing current values of selected output and input signals, allowing for quick identification of the cause of system shutdowns without connecting the support device to the controller.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the support device is connected to the controller for analyzing input-output signals, then the measurement precision and reliability are improved, but the ease of operation deteriorates because the support device is not often connected during facility operation
Solution Approach 1:
The support device performs preliminary actions by automatically acquiring input-output signal data from the controller during normal operation and generating analysis results in advance. When a shutdown occurs, the pre-prepared data and analysis capabilities are immediately available, eliminating the need for physical connection during troubleshooting.
Solution Approach 2:
The display device serves as an intermediary that presents the analysis results to operators without requiring direct connection between the support device and controller during operation. The support device communicates with the controller through automated data acquisition, while the display device mediates the presentation of results to users.
2Loss of time
If the support device is connected to the controller for real-time monitoring, then the loss of time is reduced, but the device complexity increases due to additional connection requirements
Solution Approach 1:
The support device performs self-service by automatically acquiring data from the controller through automated communication protocols and independently generating analysis results. This eliminates the need for manual connection setup and reduces troubleshooting time without adding operational complexity.
Solution Approach 2:
The system performs preliminary data acquisition and analysis during normal operation, preparing diagnostic information in advance. This preliminary action ensures that when shutdowns occur, the analysis is already complete or can be quickly finalized, reducing troubleshooting time without requiring complex real-time connections.
3Device complexity
If manual analysis of input-output signals is performed, then the device complexity is reduced, but the productivity deteriorates due to increased time and effort in finding causes
Solution Approach 1:
The support device performs self-service by automatically acquiring input-output signal data, analyzing the relationships between signals, and generating diagnostic results without human intervention. This automated self-service maintains system simplicity while dramatically improving productivity by eliminating manual analysis time.
Solution Approach 2:
The manual mechanical process of analyzing input-output relationships is replaced with an automated information processing system. The support device uses software-based signal analysis and data processing to substitute the manual analytical process, maintaining simplicity while enhancing productivity through automation.
Data Source
AI summary
A control system includes a support device used for developing a user program to be executed on a controller, and a display device that provides a supervisory control screen by referring to information held by the controller. The support device extracts a relationship between an output signal and one or more input signals defined by the user program and generates input-output correspondence information, and transmits the input-output correspondence information or screen data reflecting the input-output correspondence information to the display device. The display device provides, on the basis of the input-output correspondence information or the screen data reflecting the input-output correspondence information, the supervisory control screen showing the current value of a selected output signal and the current value of one or more input signals associated with the output signal by referring to the values of input and output signals held by the controller.