Integrated Safety PLC Modules With Common Protocol I/O
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Solution Overview
Problem
Current heating system control technologies lack integrated safety and programmable logic solutions, requiring complex customization and separate management of safety devices and programmable logic, which complicates the integration and operation of safety features in heating systems.
Innovation Solution
A modular control system that integrates configurable safety devices with user-programmable logic, allowing for customizable control programs and seamless communication between safety and non-safety modules using a common communication protocol, enabling transparent integration and operation of safety features within the programmable logic.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If separate safety devices and programmable logic are used, then safety functions can be implemented, but integration complexity and customization requirements increase
Solution Approach 1:
The patent combines separate safety devices and programmable logic into a single integrated control unit. The safety module and programmable logic controller are merged into one device with unified processing, allowing safety functions to be implemented within the programmable logic itself rather than requiring separate external safety devices. This reduces integration complexity while maintaining safety reliability.
Solution Approach 2:
The integrated control unit serves multiple functions simultaneously - it acts as both a programmable logic controller for general control tasks and a safety device for monitoring and enforcing safety constraints. The system can handle diverse control requirements through a single universal platform that supports both standard control logic and safety-critical functions.
2Adaptability or versatility
If customized control programs are developed for each application, then specific equipment requirements are met, but development time and complexity increase
Solution Approach 1:
The system provides pre-configured safety parameters, communication protocols, and control templates that can be directly applied to specific equipment types. Rather than developing everything from scratch, the customizable control program can start with pre-established safety frameworks and communication interfaces, significantly reducing development time while still allowing equipment-specific customization.
Solution Approach 2:
The system allows rapid adaptation to different equipment by changing parameters within the control program rather than rewriting entire control logic. Safety thresholds, communication rates, and operational parameters can be adjusted through configuration rather than programming, enabling quick customization for different heating equipment while maintaining the same underlying control architecture.
Data Source
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AI summary
An integrating system incorporating a programmable logic module, input/output (I/O) modules connected to the programmable logic module, and safety device modules connected to the programmable logic module. The modules may be connected with one another with connectors on each module. The modules may talk to each other via a common communication protocol carried by wires in the connectors. The programmable logic module may monitor and/or control signals on input and output terminals of the I/O modules that are connected to the actuators and sensors in controlled equipment. The programmable logic module may control non-safety aspects of the safety devices and inputs and outputs of the safety device modules and be modeled and appear in a same context as the signals of the input and output terminals of the I/O modules. A programmable display may be incorporated by the integrating system.