Industrial Machine Control System Wiring Error Detection
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Solution Overview
Problem
Conventional control systems for industrial machines cannot completely prevent dangerous high rotation/high torque operations due to wiring errors, as users may forget to lower the alarm threshold, leading to potential accidents.
Innovation Solution
A control system with a wiring error detection device that automatically detects wiring errors between the drive unit and control unit at startup by comparing feedback values with pre-set thresholds, issuing warnings and preventing dangerous operations.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If the alarm threshold is lowered to detect wiring errors earlier, then the detection capability improves, but the user may forget to adjust the threshold, leading to false alarms or missed detections
Solution Approach 1:
The system automatically manages the alarm threshold based on operational state detection, eliminating the need for manual user adjustment. The control unit self-adjusts threshold values according to whether the machine is in startup mode or normal operation, ensuring consistent detection capability without user intervention.
Solution Approach 2:
The system pre-sets appropriate alarm threshold values for different operational states (startup mode vs. normal operation). Before operation begins, the system is configured with suitable thresholds that automatically activate based on the operational phase, preventing both false alarms and missed detections.
2Object-affected harmful factors
If manual threshold adjustment is required for wiring error detection, then detection sensitivity improves, but user oversight causes safety risks
Solution Approach 1:
The control unit automatically adjusts alarm thresholds based on detected operational state, eliminating manual user intervention. The system monitors its own operation phase and self-configures appropriate threshold values, ensuring both detection sensitivity and operational simplicity.
Solution Approach 2:
The system dynamically changes the alarm threshold parameter based on operational state. During startup mode, one threshold value is applied, while during normal operation, a different threshold value is automatically activated, optimizing detection for each phase without user involvement.
3Reliability
If automatic wiring error detection is implemented, then safety improves, but system complexity increases
Solution Approach 1:
The system uses feedback from operational state monitoring to automatically adjust detection parameters. The control unit receives feedback about the current operational phase (startup or normal operation) and uses this information to automatically configure appropriate alarm thresholds, enabling safety without complex manual configuration systems.
Solution Approach 2:
The control unit performs multiple functions: it controls motor operation, monitors operational state, detects wiring errors, and automatically adjusts alarm thresholds. By consolidating these functions into a single control unit, the system achieves high safety without proportionally increasing overall system complexity.
Data Source
AI summary
Provided is a control system of an industrial machine that can automatically detect the presence or absence of a wiring error at a start-up of a machine, and that prevents a dangerous operation such as high rotation/high torque of a motor from occurring due to a wiring error. A control system of an industrial machine includes: a control unit that controls driving of a drive unit of the industrial machine; a command unit that issues a command to the control unit; and a wiring error detection device that detects a wiring error in a system of the control unit and the drive unit on a basis of a feedback value of actual driving of the drive unit upon a start-up of the industrial machine.