Safety Control Unit for Multi-Protocol Manufacturing I/O
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Solution Overview
Problem
Existing safety control systems for manufacturing sites face challenges in achieving comprehensive functional safety due to non-uniform connection forms and communication protocols between safety control devices and components, requiring direct wiring and signal exchange, which is inefficient and not scalable.
Innovation Solution
A safety control system with a safety control unit that establishes independent connections with various safety IO units and remote IO devices using standardized communication protocols like EtherCAT and CIP Safety, allowing for flexible and reliable data exchange through a local bus and network connections, ensuring functional safety across different components.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If direct wiring and signal exchange are used between safety control device and safety components, then communication reliability is improved, but device complexity and installation difficulty increase
Solution Approach 1:
The patent introduces a communication interface as an intermediary device that enables safety control devices to communicate with safety components using standardized protocols (EtherCAT, CIP Safety, Profinet, Modbus). This mediator converts and transmits signals between different protocols, eliminating the need for direct custom wiring while maintaining communication reliability through established industrial communication standards.
2Adaptability or versatility
If multiple safety components with different communication protocols are connected to the safety control device, then system versatility is improved, but device complexity increases
Solution Approach 1:
The patent implements a universal communication interface that supports multiple communication protocols (EtherCAT, CIP Safety, Profinet, Modbus) simultaneously. This allows a single safety control device to connect to various types of safety components using different protocols without requiring separate dedicated interfaces for each protocol, thereby achieving multi-functionality and reducing overall system complexity.
3Reliability
If comprehensive safety control is implemented across the manufacturing site, then safety coverage is improved, but system complexity increases
Solution Approach 1:
The patent segments the safety control system into independent functional modules, where each safety component (safety sensors, safety actuators, safety switches) operates as an independent unit connected through standardized communication interfaces. This modular segmentation allows comprehensive safety coverage across the manufacturing site while keeping each individual component and connection simple and manageable.
Data Source
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AI summary
A safety control system (1) that can realize comprehensive safety control for a manufacturing site is provided. A safety control system includes an arithmetic operation processing unit (202), a data storing unit (204; 250) that stores safety input/output data, and a plurality of communication processing units (2062; 260) that exchange safety input/output data with a device that is a connection destination. Each of the plurality of communication processing units (2062; 260), independently from processes of the other communication processing units, periodically transmits safety output data for a target device stored in the data storing unit to the target device and writes safety input data from the target device into the data storing unit in accordance with a connection setting set (2064) in advance for each of the communication processing units.