Daisy-Chain Communication Cycle Alignment for Mixed-Rate Slaves
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Solution Overview
Problem
In data transmission systems where multiple controlled drive devices with different data update cycles are connected, the communication efficiency is compromised due to the adjustment of the communication cycle to the shortest update cycle, leading to over-specification and inefficiency for devices with longer update cycles.
Innovation Solution
A communication device sets the update cycle of a specific slave with the shortest data update cycle to a reference cycle, and adjusts the update cycles of other slaves to integral multiples of this reference cycle, optimizing communication efficiency by matching cycle lengths to device requirements.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Stability of the object's composition
If the communication cycle is adjusted to the shortest update cycle among multiple slaves, then all slaves can be synchronized, but slaves with longer update cycles experience over-specification and communication efficiency decreases
Solution Approach 1:
The patent segments the communication system into multiple groups based on update cycle characteristics. Slaves with similar update cycle requirements are grouped together, allowing each group to operate at its optimal cycle rate while maintaining overall system synchronization through the master device's coordinated control.
Solution Approach 2:
The patent implements dynamic cycle adjustment where the master device can adaptively change communication cycles for different slave groups based on their actual update requirements. This allows the system to transition from a fixed shortest-cycle approach to a flexible, demand-driven cycle structure that eliminates over-specification.
2Device complexity
If a fixed communication cycle is used for all slaves, then system synchronization is simplified, but slaves with longer update cycles operate with over-specification
Solution Approach 1:
The patent divides slaves into multiple groups with different communication cycle configurations. Each group operates with cycles matched to its update requirements, reducing over-specification while the master device manages synchronization across groups through coordinated timing mechanisms.
Solution Approach 2:
The master device implements a universal synchronization mechanism that can handle multiple cycle configurations simultaneously. This multi-functional approach allows different slave groups to operate at different cycles while maintaining overall system coherence through the master's coordinated control.
Data Source
AI summary
Communication device is a communication device to which a plurality of slaves are daisy-chained and which communicates with the plurality of slaves. Communication device includes processor. Processor executes setting processing. In the setting processing, an update cycle of a specific slave that is a slave having a shortest data update cycle among the plurality of slaves is set to a reference cycle, and an update cycle of another slave different from specific slave among the plurality of slaves is set to an integral multiple of the reference cycle.