Profibus I/O Module Data Consolidation
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Solution Overview
Problem
In industrial process control systems, managing Profibus device information is complex due to the need for separate requests for individual pieces of information within messages, which increases processing overhead and reduces efficiency.
Innovation Solution
A method and system where a Profibus device is communicatively coupled to an I/O module assembly that extracts and processes input parameter data from received messages, storing measured and status values and providing them as a single unit in response to a single request, thereby reducing the number of requests needed.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If separate requests are sent for individual pieces of information within Profibus messages, then complete information can be obtained, but processing overhead increases and efficiency decreases
Solution Approach 1:
The patent combines multiple individual information requests into a single consolidated request that retrieves all necessary data (measured values, status values, and quality indicators) in one transaction. This merging approach eliminates the overhead of multiple separate requests while ensuring complete information is obtained, directly resolving the contradiction between information completeness and processing efficiency
2Loss of information
If multiple separate requests are made to retrieve different data elements, then all data can be collected, but the number of requests and processing overhead increase
Solution Approach 1:
The system merges multiple data retrieval operations into a single request that simultaneously obtains measured values, status values, and quality indicators. This consolidation reduces the time spent on sequential requests while ensuring all necessary data elements are collected, addressing both data completeness and time efficiency
3Measurement precision
If individual data elements are requested separately, then precise data retrieval is achieved, but system complexity and overhead increase
Solution Approach 1:
The patent merges the retrieval of precisely defined data elements (measured values, status values, quality indicators) into a single operation. This approach maintains data retrieval precision by specifying exact data elements while reducing system complexity by eliminating the need for multiple separate request-handling mechanisms
Data Source
AI summary
A method and system are disclosed for managing Profibus device information in a distributed control system. After receiving input parameter data originating from a Profibus device message, the I/O module assembly performs steps for processing, maintaining and providing the input parameter data to a requesting control processor. The processing step includes extracting input parameter values from a received Profibus device message. The extracted input parameters are then deposited in a repository on the I/O module assembly, such that for a primary input parameter, the I/O module assembly stores at least: (1) a measured value, and (2) a status value. Furthermore, the I/O module assembly maintains a reference linking the first status parameter to the first input parameter. The I/O module assembly provides a data status value with the measured value for the first input parameter in accordance with an I/O read operation. The data status value is based on the status value for the first status parameter.