Modular Process Control Architecture for Multi-Fieldbus Flexibility
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Solution Overview
Problem
Existing process control systems face significant maintenance efforts due to the need for frequent updates of hardware components, particularly in fieldbus communication interfaces, which requires redesigning multiple variants for each fieldbus type, leading to bandwidth limitations and increased maintenance costs.
Innovation Solution
A process control system featuring a module termination unit with adapter and controller modules connected via a peer-to-peer connection, allowing flexible selection of fieldbus types, enabling fast detection of module insertion, removal, or failure, and utilizing a common generic CPU core to avoid bandwidth limitations, with optional redundancy and flexible configuration options.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If multiple variants of fieldbus communication interface hardware are redesigned for each fieldbus type, then compatibility with different fieldbus types is improved, but maintenance effort and device complexity increase significantly
Solution Approach 1:
The patent implements a universal controller module architecture that can interface with multiple fieldbus types (PROFIBUS, PROFINET, EtherCAT, etc.) through a single standardized interface. The controller module contains a generic communication interface that can be configured to support different fieldbus protocols, eliminating the need for separate hardware variants for each fieldbus type. This universal design reduces maintenance effort while maintaining compatibility across multiple fieldbus standards.
Solution Approach 2:
The system is segmented into distinct functional modules: adapter modules for field device connection, controller modules for protocol handling, and a standardized interface module. Each module has a specific function and can be independently configured or replaced. The controller module is further segmented into a generic communication interface and protocol-specific software layers, allowing protocol support to be changed without hardware modifications.
2Device complexity
If a bus architecture is used on the module termination unit, then device complexity is reduced, but bandwidth limitations occur
Solution Approach 1:
The patent segments the communication architecture into a standardized interface bus for module interconnection and dedicated peer-to-peer communication channels for high-speed signal transfer. The standardized interface bus (e.g., I2C, SPI, or custom protocol) provides simple module management and configuration, while separate high-speed channels handle time-critical field device data transmission, eliminating bandwidth bottlenecks.
Solution Approach 2:
The controller module acts as an intermediary between the standardized interface bus and the fieldbus adapter modules. It manages communication over the simple bus architecture while providing high-speed data paths to multiple adapters simultaneously through its internal processing capabilities, thus maintaining both architectural simplicity and high bandwidth performance.
3Adaptability or versatility
If adapter modules are frequently updated to match electronic market changes, then system adaptability to new technologies is improved, but maintenance effort and system downtime increase
Solution Approach 1:
The system is designed with hot-swappable adapter modules that can be independently updated without affecting the controller module or other adapters. Each adapter module is a self-contained unit with its own fieldbus interface, allowing individual modules to be replaced or upgraded during system operation. This segmentation enables technology updates while maintaining system availability.
Solution Approach 2:
The controller module includes pre-configured support for multiple fieldbus protocols and adapter types through software configuration capabilities. Before an adapter module is physically installed or updated, the controller can be pre-configured with the appropriate protocol parameters and communication settings, enabling rapid integration of new adapters without extensive reconfiguration or system downtime.
Data Source
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AI summary
A process control system comprising at least one module termination unit, at least one adapter module arranged on the module termination unit and configured to communicate with a field device, and at least one controller module arranged on the module termination unit and configured to process data from the adapter module, wherein the adapter module and the controller module are connected to each other by a peer-to-peer connection, in particular through the module trermination unit.