Single Shot Output Section for SCADA Tag Exhaustion
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Solution Overview
Problem
Conventional plant control systems face performance deterioration and reliability issues due to the increased number of programs and internal tags required for single shot output operations, leading to increased work during signal addition/deletion and tag exhaustion in large-scale systems.
Innovation Solution
A plant control system with a single shot output functioning section that sends control signals to the programmable logic controller and erasure signals from outside the SCADA system and programmable logic controller, reducing the need for additional programs and internal tags.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the SCADA system uses internal tags and programs for each control operating button to achieve single shot output, then the control functionality is complete, but the number of internal tags and programs increases greatly, deteriorating system performance and reliability
Solution Approach 1:
The patent introduces a single shot output functioning section as an intermediary component between the SCADA system and the programmable logic controller. This intermediary handles the single shot output functionality externally, eliminating the need for numerous internal tags and programs within the SCADA system while maintaining complete control functionality.
Solution Approach 2:
The patent extracts the single shot output functionality from the SCADA system's internal tag management and implements it in an external single shot output functioning section. This extraction removes the burden of managing numerous internal tags and programs from the SCADA system, reducing complexity while preserving the desired control behavior.
2Ease of operation
If the SCADA system implements single shot output using programs for each control button, then the control signal can be turned off after certain time, but the amount of work during addition/deletion of signals increases
Solution Approach 1:
The single shot output functioning section serves as an intermediary that automatically manages the timing and erasure of control signals. When a control signal is sent to the programmable logic controller, the intermediary automatically sends an erasure signal after the predetermined time period, eliminating manual intervention and reducing the time and effort required for signal management.
Solution Approach 2:
The single shot output functioning section implements self-service by automatically handling the entire single shot output process including signal transmission, timing, and erasure. The system manages its own operation without requiring external programs or manual intervention for each control button, significantly reducing the workload during signal addition and deletion.
3Adaptability or versatility
If the SCADA system uses internal tags for each control operating button, then the single shot output can be implemented, but the internal tags are exhausted in large-scale plant control systems
Solution Approach 1:
The single shot output functioning section acts as an intermediary that externalizes the tag management functionality. Instead of consuming internal tags within the SCADA system for each control button, the intermediary handles the single shot output operations using external resources, allowing the system to scale to large-scale plant control applications without exhausting internal tag resources.
Solution Approach 2:
The single shot output functioning section provides a universal solution that serves all control operating buttons through a single external component. This multi-functional approach eliminates the need for dedicated internal tags for each button, allowing the system to handle any number of control buttons without increasing the internal tag count, thus enabling scalability to large-scale systems.
Data Source
AI summary
A plant control system carrying out a single shot output without adding a program concerning signal transfer between a supervisory control device and a programmable logic controller to the supervisory control device and the programmable logic controller. The plant control system includes a single shot output functioning section which causes a SCADA system connected to a programmable controller for controlling the plant to send a control signal corresponding to control content of a selected plant to the programmable controller, and, thereafter, to send an erasure signal for erasing the control signal held in the programmable controller to the programmable controller. The single shot output functioning section is outside of the SCADA system and outside of the programmable controller.