Yarn Spindle Station-Passing Control via MES-PLC Coordination
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Solution Overview
Problem
The challenge in chemical fiber production is the inefficient and inconsistent station-passing of yarn spindles, which affects overall production pace and efficiency, leading to bottlenecks in output capacity.
Innovation Solution
A system involving a Manufacturing Execution System (MES), a first Programmable Logic Controller (PLC), and multiple second PLCs, where the first PLC acts as an intermediate layer to manage and process operational data from second PLCs, enabling real-time monitoring and automatic control of yarn spindle station-passing, reducing manual intervention and improving efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Productivity
If manual control of station-passing is used, then operational flexibility is maintained, but production efficiency and consistency deteriorate
Solution Approach 1:
The control system is segmented into multiple hierarchical levels: MES (Manufacturing Execution System) for overall coordination, first PLC for station-level control, and second PLCs for individual equipment control. This segmentation allows automatic station-passing execution while maintaining centralized monitoring and intervention capabilities, thus improving efficiency without complete automation.
Solution Approach 2:
The first PLC acts as an intermediary between the MES and second PLCs, translating high-level production schedules into specific station-passing commands. This intermediary layer enables automatic execution while preserving the ability to manually adjust through the MES interface, resolving the contradiction between automation and flexibility.
2Productivity
If station-passing speed is increased to improve productivity, then output capacity improves, but production consistency and quality control worsen
Solution Approach 1:
The system implements real-time feedback mechanisms where the first PLC continuously monitors station operational status and yarn spindle positions, comparing them against the production schedule from MES. This feedback loop enables dynamic speed adjustment to maintain consistency while maximizing throughput, preventing quality degradation at higher speeds.
Solution Approach 2:
The station-passing speed is made dynamic rather than fixed, allowing the system to automatically adjust speeds based on real-time conditions such as yarn tension, station capacity, and spindle position. This dynamic control maintains production consistency while optimizing output capacity across varying operational conditions.
3Reliability
If more manual intervention is used for station-passing control, then production consistency is maintained, but downtime and operational complexity increase
Solution Approach 1:
The system enables self-service automatic station-passing execution where the first PLC autonomously manages yarn spindle transfer between stations based on MES schedules and real-time status feedback. This eliminates the need for continuous manual intervention while maintaining consistency, significantly reducing downtime without sacrificing reliability.
4Productivity
If a centralized control system is implemented, then production coordination improves, but system complexity and implementation difficulty increase
Solution Approach 1:
The centralized control is segmented into hierarchical layers with MES handling high-level coordination, first PLC managing station-level automation, and second PLCs controlling individual equipment. This segmentation reduces implementation complexity by distributing control functions while maintaining centralized coordination benefits.
Solution Approach 2:
The first PLC serves multiple functions: receiving schedules from MES, monitoring station status, controlling station-passing execution, and providing feedback to MES. This multi-functionality reduces the number of separate control devices needed, simplifying the overall system while maintaining effective centralized coordination.
Data Source
AI summary
Provided are a method for controlling automatic station-passing of yarn spindle, an electronic device and a storage medium, relating to the technical field of chemical fiber intellectualization. The method includes: obtaining, by a first PLC, second operational data of a target station from a second PLC corresponding to the target station, and obtaining first operational data of the target station according to the second operational data; sending, by the first PLC, the first operational data to an MES and receiving station-passing indication information determined by the MES based on the first operational data for the target station; and parsing, by the first PLC, the station-passing indication information to obtain a parsing result and returning the parsing result to the second PLC corresponding to the target station, so that the second PLC controls the target station based on the parsing result to execute a yarn spindle station-passing task.