Dynamic Publishing Control for Secure Process Value Exchange
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Solution Overview
Problem
Existing control devices lack efficient management of data exchange with external devices, as the required data varies by situation, leading to inconsistent and insecure data sharing.
Innovation Solution
A control device with a management module to manage process values, a communication module to exchange data with external devices based on dynamic publishing settings determined by the execution result and operating state, and a publishing management module to define access permissions and data changes accordingly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If data exchange with external devices is allowed freely, then ease of operation is improved, but security is worsened
Solution Approach 1:
The publishing management module dynamically determines publishing settings based on the current operating state and execution results of the control device. This allows the data exchange permissions to be flexible and adaptive rather than fixed, enabling the system to grant access when safe and restrict it when risky, thus resolving the contradiction between ease of operation and security.
Solution Approach 2:
The system changes the publishing settings parameter according to different operating states and execution results. By modifying the data exchange permissions based on system state parameters, the patent achieves both easy data exchange when conditions permit and high security when conditions require restriction.
2Device complexity
If publishing settings are fixed, then device complexity is reduced, but adaptability is worsened
Solution Approach 1:
The publishing management module automatically determines appropriate publishing settings based on the control device's own execution results and operating state, without requiring external intervention or complex manual configuration. This self-service approach maintains low system complexity while achieving high adaptability to different situations.
Solution Approach 2:
The system uses feedback from execution results and operating state to automatically adjust publishing settings. This closed-loop control mechanism enables the system to adapt to changing conditions without increasing operational complexity, as the adjustments are made automatically based on system feedback.
3Ease of operation
If all process values are published, then ease of operation is improved, but loss of information is worsened due to exposure of sensitive data
Solution Approach 1:
The publishing management module applies different publishing settings to different process values based on their sensitivity and the current system state. Instead of a blanket publish-or-not-publish approach, the system selectively publishes only appropriate data to the external device, maintaining data accessibility for non-sensitive information while protecting sensitive data.
Data Source
AI summary
An object is to provide a function of managing data exchanged with an external device. A control device defines a publishing setting of a process value in accordance with information on one or both of an execution result of a control program and an operating state of the control device. The control device exchanges a data set including a part of one or more process values with the external device in accordance with the defined publishing setting.