Synchronized Control Signal Frames With Terminator-Based Error Checking
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Solution Overview
Problem
Existing control and monitoring signal transmission systems require large-scale system changes and increased transmission procedures to check for errors in data transmission, especially when remote stations lack the ability to extract information from other stations, and they are inefficient in identifying errors without specifying the remote stations.
Innovation Solution
A control and monitoring signal transmission system that uses a terminator to extract all monitoring data, convert it into check data, and superimpose it on a frame, allowing the master station to confirm transmission errors without requiring large-scale system changes or additional data ranges, by comparing check data with comparison data.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a transmission synchronization method is used to reduce wiring in a control system with multiple remote stations, then the number of wirings is reduced and system complexity is decreased, but it becomes difficult to specify and detect errors in transmission data from remote stations, requiring extensive manual checking time
Solution Approach 1:
The patent applies preliminary action by pre-calculating and attaching check data (error detection codes) to transmission data frames before they are sent over the common transmission line. This allows the master station to automatically verify data integrity upon receipt without requiring manual checking of each remote station, thus resolving the contradiction between simplified wiring and error detection capability
Solution Approach 2:
The patent implements feedback by having the master station compare received check data with independently calculated check data from the transmission data. This automatic feedback mechanism enables real-time error detection in the transmission synchronization system without increasing wiring complexity or requiring manual intervention
2Reliability
If conventional error checking methods using control transmission check data and monitoring transmission check data are implemented, then transmission errors can be detected, but large-scale system changes are required to replace all remote stations with ones that have data extraction functions
Solution Approach 1:
The patent applies the extraction principle by removing the requirement for remote stations to have data extraction functions. Instead, the master station extracts and processes check data from incoming frames, allowing existing simple remote stations to be retained while still achieving reliable error detection through the attached check data mechanism
Solution Approach 2:
The patent uses copying by having the master station independently recalculate check data from received transmission data using the same algorithm that generated the original check data. This copied verification process enables error detection without requiring complex modifications to remote stations or their data extraction capabilities
3Reliability
If a management data range is added to transmit check data and enable error verification, then transmission errors can be confirmed, but the transmission procedure becomes more complex and the required transmission rate cannot be achieved in some cases
Solution Approach 1:
The patent applies merging by integrating check data directly into the existing transmission data frames rather than creating separate management data ranges or additional communication channels. This combines error verification functionality with the existing transmission protocol, maintaining the required transmission rate while enabling reliable error detection
Data Source
AI summary
In a control and monitoring signal transmission system according to the present invention, a master station that transmits and receives data to and from a control unit, a plurality of remote stations that transmit and receive data to and from the master station by a transmission synchronization method via a common transmission line, and a terminator that is connected to the common transmission line are provided, and transmitting and receiving data between the master station and the remote stations is performed by superimposing data on a frame repeatedly transmitted from the master station. The terminator extracts all of the monitoring data transmitted from the remote stations, converts the monitoring data into check data by a predetermined rule, and superimposes the check data on a check data output range provided at the end of the frame. The master station converts all of the monitoring data transmitted from the remote stations into the comparison data by the same rule as the terminator, and determines that there is an error in the transmission data when the comparison result of the check data and the comparison data is inconsistent between the check data and the comparison data.