Low voltage apparatus communication protocol adapter

A technology for low-voltage electrical appliances and communication protocols, applied in the field of low-voltage electrical appliances communication protocol adapters, can solve the problems of not wide cabinet space, increased costs, and prolonged low-voltage electrical network inspection time, and achieves the effect of increasing adaptability and facilitating installation.

Inactive Publication Date: 2014-01-29
SHANGHAI MEILANRILAN ELECTRICAL APPLIANCE GRP WHOLE SET ELECTRICAL
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  • Application Information

AI Technical Summary

Problems solved by technology

However, in actual use, because the entire low-voltage system is generally composed of products from several low-voltage electrical appliances manufacturers, the communication protocols attached to the low-voltage electrical appliances may be different or the content of the agreement may be slightly different. When networking, it is necessary to purchase a dedicated low-voltag...

Method used

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  • Low voltage apparatus communication protocol adapter

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Embodiment approach

[0010] (1) The user sets the number of low-voltage electrical components connected to each communication bus through the keyboard, and the single-chip DSP2 passes through the I 2 The C serial bus informs the microcontroller DSP1, and sets any mode of the three buses to upload data;

[0011] (2) The single-chip DSP1 inquires the data of each low-voltage electrical component connected on the Modbus-RTU bus through the Universal Asynchronous Transceiver (UART1) module, and converts the data into a standard Modbus protocol format, and passes through the I 2 The C serial bus is stored in the off-chip memory;

[0012] (3) single-chip DSP1 queries the data of each low-voltage electrical component connected on the Profibus-DP bus through the universal asynchronous transceiver (UART2) module, and converts the data into a standard Profibus-DP protocol format, and passes through the I 2 The C serial bus is stored in the off-chip memory;

[0013] (4) Single-chip microcomputer DSP1 queri...

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Abstract

The invention relates to a low voltage apparatus communication protocol adapter comprising a dual microprocessor, dual Modbus RTU protocol conversion circuits, a Profibus DP, Device Net protocol conversion circuits, an off-chip data memory, a liquid crystal display and a keyboard. An on-chip universal asynchronous receiver transmitter of the dual microprocessor is connected to RS485 level conversion transceiver circuits of the dual Modbus RTU protocol conversion circuit and ProfibusDP, an on-chip controller local area network is connected with conversion transceiver circuits of the DeviceNet, and low-voltage apparatus data acquisition and bus command and event response can be completed; a 12 C communication module of the dual microprocessor and a 12 C-based off-chip data memory are connected, and data storage and extraction of processed low-voltage apparatus parameters. According to the technical scheme, a dual microprocessor and the caching technique are adopted, response time of other adapter during operation is shortened, and the low voltage apparatus communication protocol adapter can be used as a centralized controller, a network small-size server and an adapter; connection of utmost three types of buses can be completed, adaptability of low voltage apparatuses during networking is improved greatly, and users can assemble the adapter conveniently.

Description

technical field [0001] The invention belongs to a low-voltage electrical appliance accessory part, in particular to a low-voltage electrical appliance communication protocol adapter common to MODBUS-RTU, Profibus DP, and Devicenet protocol communications of universal circuit breakers, molded case circuit breakers, and thermal relays. Background technique [0002] Low-voltage electrical appliances in known low-voltage power distribution networks generally use MODBUS-RTU, Profibus DP, and Devicenet communication protocols for data networking communication. However, in actual use, because the entire low-voltage system is generally composed of products from several low-voltage electrical appliances manufacturers, the communication protocols attached to the low-voltage electrical appliances may be different or the content of the agreement may be slightly different. When networking, it is necessary to purchase a dedicated low-voltage electrical appliance The communication protocol...

Claims

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Application Information

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IPC IPC(8): H04L29/06
Inventor 陈伟
Owner SHANGHAI MEILANRILAN ELECTRICAL APPLIANCE GRP WHOLE SET ELECTRICAL
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