Bus Coordinator Module Addressing via Slot Translation
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Solution Overview
Problem
Existing bus arrangements in automation technology face challenges in efficiently addressing and communicating with multiple modules and subscribers, particularly in configuring and operating a modular bus system where each module needs to be uniquely addressed for data transmission and command execution.
Innovation Solution
A bus arrangement that includes a coordinator with two bus terminals, a first subscriber with a base module and multiple modules, and a bus that couples the terminals, allowing the coordinator to convert fieldbus telegrams into bus telegrams and address specific modules or the base module by determining subscriber and module addresses from slot numbers stored in memory, enabling direct communication and configuration of each module.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Measurement precision
If a coordinator converts fieldbus telegrams into bus telegrams to address individual modules, then communication precision and module addressing capability are improved, but device complexity increases
Solution Approach 1:
The coordinator serves as an intermediary device between the fieldbus and the local bus, translating fieldbus telegrams into bus telegrams. It maintains allocation tables that map fieldbus slot numbers to subscriber addresses and module numbers, enabling precise module addressing while managing the complexity centrally in the coordinator rather than in each subscriber device.
2Productivity
If each module in a subscriber is uniquely addressable, then communication efficiency and operational flexibility are improved, but the complexity of managing multiple addresses increases
Solution Approach 1:
The addressing system is segmented into two levels: subscriber address level and module number level. Each subscriber can have multiple modules (N≥1), and each module is uniquely identified by a combination of subscriber address and module number. This segmentation allows efficient communication with individual modules while organizing address management in a structured, hierarchical manner.
Solution Approach 2:
The coordinator acts as an intermediary that manages the mapping between fieldbus slot numbers and the two-level address structure (subscriber address, module number). It maintains allocation tables that store these mappings, thereby simplifying address management for the subscribers while enabling precise module-level addressing.
3Adaptability or versatility
If a modular bus system with multiple subscribers and modules is implemented, then system versatility and adaptability are improved, but the difficulty of configuration and operation increases
Solution Approach 1:
The bus arrangement implements a universal addressing scheme where any subscriber can have any number of modules (N≥1), and the system supports both fieldbus integration and local bus communication. The coordinator handles multiple functions including telegram conversion, address translation, and module identification, making the system versatile while maintaining a consistent operation model across different configurations.
Solution Approach 2:
The coordinator serves as a central intermediary that manages the complexity of configuration and operation. It maintains allocation tables that map fieldbus slot numbers to subscriber addresses and module numbers, and it handles the conversion between fieldbus telegrams and bus telegrams. This centralization of management functions simplifies the operation for end users while supporting high system versatility.
Data Source
AI summary
A bus arrangement includes a first subscriber, which includes a base module and a first number N of modules; a second subscriber; a coordinator, which includes a first bus terminal and a second bus terminal; and a bus that couples the first bus terminal with the first subscriber and the second subscriber. The coordinator is configured such that, in a configuration phase (K), it sends the first subscriber a first bus telegram for requesting information, the first subscriber being configured to transmit the first number N to the coordinator. The coordinator is configured to receive a fieldbus telegram via the second bus terminal and to convert the field bus telegram into a second bus telegram that is directed to the base module or to a module from the first number N of modules and to transmit the second bus telegram via the first bus terminal.