Operation Screen Control Under Poor CNC Communication Quality
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Solution Overview
Problem
In industrial settings, communication quality between numerical controllers and terminal devices can deteriorate rapidly due to noise, leading to malfunctions in industrial machines, undetected alarms, and potential safety and economic risks, as the terminal devices may not accurately reflect the machining status.
Innovation Solution
A control system that includes a communication quality measurement unit, a determination unit, and a display control unit to assess and display the communication quality, adjusting the operation screen image to reflect 'good,' 'acceptable,' or 'poor' communication conditions, ensuring reliable information sharing and preventing operator misrecognition.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If wireless communication is used between terminal device and numerical controller, then ease of operation is improved, but reliability deteriorates due to noise and communication quality degradation
Solution Approach 1:
The system continuously measures communication quality indices (such as signal strength, error rates) between the terminal device and numerical controller, and uses this feedback to dynamically adjust display content. When communication quality deteriorates, the system alerts operators and modifies the operation screen to show only critical information, ensuring reliable operation despite wireless communication instability.
Solution Approach 2:
The display control system dynamically changes the operation screen image based on real-time communication quality assessment. The display transitions between different modes (normal operation, warning, alarm) depending on communication conditions, making the system adaptive to varying wireless communication reliability rather than static.
2Reliability
If communication quality monitoring is implemented, then reliability is improved, but device complexity increases
Solution Approach 1:
The terminal device's existing display unit and processing capabilities are used for multiple purposes: normal operation display, communication quality monitoring, and alarm notification. By making the display system multi-functional, the patent avoids adding separate dedicated monitoring hardware, thus improving reliability through monitoring while minimizing increases in device complexity.
3Reliability
If display information is reduced during poor communication, then reliability is improved, but loss of information increases
Solution Approach 1:
The display system applies local quality control by selectively showing different types of information based on communication quality. During poor communication, non-critical decorative or detailed information is omitted, while critical operational data and alarm messages are prioritized and displayed with higher prominence, ensuring that the most important information is always available.
Data Source
AI summary
To reduce the disadvantage caused by low communication quality. A control system includes a controller configured to control an industrial machine, and a terminal device configured to communicate with the controller. The control system includes a communication quality measurement unit configured to measure as index indicating communication quality between the controller and the terminal device, a communication quality determination unit configured to determine the communication quality between the controller and the terminal device on the basis of the index measured by the communication quality measurement unit, a display unit configured to display an operation screen image for the controller, and a display control unit configured to control a display item of the operation screen image to be displayed on the display unit on the basis of result determined by the communication quality determination part.