Parallel Fieldbus Node Communication via Wired-AND Logic
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Solution Overview
Problem
Conventional communication methods in parallel systems focus on communication between nodes and a main control unit, neglecting communication among nodes, leading to low data exchange rates due to sequential data transmission and lack of information exchange among nodes.
Innovation Solution
A communication method and device that utilize a fieldbus to acquire and convert status parameters into logic level signals, generate differential signals, and perform a wired-AND operation to enable simultaneous data exchange among nodes without priority arbitration, allowing nodes to synchronize and match status parameters.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If conventional bus system adopts arbitration mechanism for sequential data transmission, then communication control is simplified, but data exchange rate decreases
Solution Approach 1:
The communication system is segmented into multiple independent transmission channels (first communication channel for node-to-main control unit, second communication channel for node-to-node), allowing simultaneous operations without arbitration overhead
Solution Approach 2:
The system transitions from sequential time-domain transmission to parallel space-domain transmission by adding multiple communication channels, enabling simultaneous data exchange among nodes without compromising control simplicity
2Extent of automation
If conventional communication focuses on node-to-main control unit communication, then main control function is strengthened, but node-to-node communication capability is neglected
Solution Approach 1:
The communication system is designed with multi-functionality: the first communication channel handles node-to-main control unit communication for centralized control, while the second communication channel enables node-to-node communication for peer-to-peer data exchange, making the system adaptable to various communication needs
Solution Approach 2:
The main control unit acts as an intermediary for certain communication functions while allowing direct node-to-node communication through the second channel, providing both centralized control and distributed communication capabilities
3Device complexity
If nodes transmit data sequentially according to priority, then communication protocol is simplified, but information exchange efficiency decreases
Solution Approach 1:
The system pre-establishes multiple dedicated communication channels before data transmission occurs, so that when nodes need to exchange information, they can immediately use the appropriate channel without protocol negotiation or arbitration delays
Solution Approach 2:
Multiple communication channels enable continuous parallel data transmission among nodes without interruption for arbitration or priority checking, maintaining continuous useful action throughout the communication process
Data Source
AI summary
A communication method and a communication device based on a parallel system, a terminal and a computer readable storage medium are provided. The parallel system includes a fieldbus and two or more communication nodes connected to the fieldbus in parallel. The communication method includes: acquiring a status parameter of a target communication node; converting the status parameter into a logic level signal; generating an input differential signal based on the logic level signal; sending the input differential signal to the fieldbus and synchronously receiving an output differential signal from the fieldbus, where the output differential signal is generated by the fieldbus by performing a wired-AND operation on input differential signals received from the two or more communication nodes; and acquiring information of the communication nodes connected to the fieldbus based on the output differential signal.