Motorized Conveyor Roller Control During IO-Link Failures
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Solution Overview
Problem
Conveyor devices may stop or operate uncontrollably due to communication irregularities or failures in the communication network, especially when the motor driving device is defined as an IO-Link device.
Innovation Solution
A conveyor system that includes a motorized conveyor roller with a control part and a communication part, and a switching device that stores control content and takes over motor control in case of a communication irregularity, ensuring predetermined control even during network failures.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If the motor driving device is defined as an IO-Link device for centralized control via communication network, then the control system achieves centralized management and communication capability, but the conveyor device may stop or operate uncontrollably when communication irregularity or failure occurs
Solution Approach 1:
The switching device stores control content in advance before communication failure occurs. When the motorized conveyor roller detects communication irregularity, the stored control content is already available for immediate execution, enabling seamless transition to local control without waiting for communication recovery
Solution Approach 2:
The system prepares backup control content in the switching device as a cushion against communication failure. This pre-prepared control content acts as a safety buffer that prevents operational disruption when the communication network becomes irregular or fails
2Extent of automation
If the conveyor device operates under centralized control via communication network, then the system achieves unified management, but the device may operate uncontrollably when communication failure occurs
Solution Approach 1:
The control system dynamically switches between centralized control mode (via communication network) and local control mode (using stored control content). The motorized conveyor roller and switching device can adaptively change control sources based on communication status, transitioning from automated centralized control to semi-automated local control when needed
Solution Approach 2:
The switching device acts as an intermediary between the communication network and the motorized conveyor roller. It receives and stores control content from the communication network, then serves as a local control source when network communication fails, mediating between centralized automation and local reliability
Data Source
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AI summary
A conveyor system in the present invention includes a motorized conveyor roller, i.e., a CM roller, and a switching device. The C-M roller includes a control part located in a roller tube for controlling a motor in accordance with a control content carried by a control signal received by a communication part and outputs the control content carried by the control signal received by the communication part to the switching device. The switching device stores the control content. The C-M roller outputs a communication irregularity to the switching device when the communication irregularity is determined to exist. The switching device causes the control part to control the motor in accordance with the stored control content in response to the communication irregularity.