I/O Network Module Addressing for Direct Field Device Communication
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing process control networks face limitations in direct communication between control systems and field devices, relying on intermediaries like head stations for signal transmission, which restricts flexibility and efficiency.
Innovation Solution
The introduction of I/O network modules with network ports compatible with process control networks, enabling direct communication between control systems and field devices through standardized protocols like TCP/IP, and allowing for selectable-mode conversion circuits to adapt to different I/O signal formats.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If head station intermediaries are used for signal transmission, then centralized control is achieved, but communication flexibility and efficiency are restricted
Solution Approach 1:
The patent extracts the head station intermediary from the communication path and replaces it with direct network connections between field devices and the control system. Each I/O network module is assigned a unique network address, enabling direct communication without requiring centralized signal routing through a head station.
Solution Approach 2:
The patent introduces network modules with unique network addresses as new intermediaries that operate at the network layer rather than requiring physical signal routing through a head station. These modules enable direct digital communication while maintaining structured network management.
2Adaptability or versatility
If fixed-mode conversion circuits are used, then signal conversion is simplified, but adaptability to different field devices is reduced
Solution Approach 1:
The patent implements selectable-mode conversion circuits that can dynamically switch between different conversion modes based on the connected field device type. The conversion circuit can be configured to handle analog signals, digital signals, or other signal types, providing adaptability without requiring multiple dedicated circuits.
Solution Approach 2:
The I/O network module is designed with universal functionality to support multiple field device types through selectable conversion modes. A single module can serve various purposes by changing its conversion mode, eliminating the need for multiple specialized modules.
3Productivity
If direct communication between control system and field devices is implemented, then communication efficiency is improved, but network configuration complexity increases
Solution Approach 1:
The patent implements automatic network address assignment and device identification features. When a field device is connected to an I/O network module, the system automatically configures the communication parameters and assigns network addresses, eliminating the need for manual network configuration and reducing setup complexity.
Data Source
Figure 1~2
Figure 3
AI summary
I/O network modules connect field devices to a process control network. Each I/O network module includes a set of electrical connectors for connecting a field device to the module and an I/O channel extending from the set of electrical connectors to a network port. The EO channel includes a conversion circuit that converts between an EO signal and network-compatible signals. Each I/O channel connected to the process control network through an EO network module is associated with its own unique network address. This enables controllers and field devices on the process control network to communicate essentially directly with one another through the network.