Relay-Based Communication State Detection for Distributed Control
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Solution Overview
Problem
In network distributed control systems, the control performance and operating rate can fluctuate due to changes in the communication state of the transmission path, necessitating a configuration that can quickly respond to these changes.
Innovation Solution
A control system comprising a first and second controller connected via separate transmission paths, with a relay unit that detects the communication state of one path and transmits this information to the second controller, allowing for cyclic communication of output data and state data to enable timely action.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the relay unit transmits both output data and state data to the second controller, then the second controller can take action against communication state changes, but the data transmission volume increases
Solution Approach 1:
The relay unit extracts only the essential communication state information and transmits it as state data to the controller. This selective transmission of critical information enables the controller to respond to communication state changes without requiring transmission of all raw communication data, thus balancing response capability with data transmission volume.
Data Source
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AI summary
A configuration is provided that can quickly take action against a communication state of a transmission path. The configuration includes a first controller including an interface for connection to a first transmission path, a second controller including an interface for connection to a second transmission path, and a relay unit including a first interface for connection to the first transmission path and a second interface for connection to the second transmission path. The relay unit includes a detection unit configured to detect a communication state of the first transmission path. The relay unit is configured to, in accordance with a transfer setting, transmit, to the second controller, output data transmitted from the first controller, and transmit, to the second controller, first state data indicating the detected communication state of the first transmission path.