Data acquisition system based on Modbus protocol

A technology of data acquisition system and protocol data, which is applied in the direction of digital transmission system, transmission system, data exchange network, etc., and can solve problems such as failure to collect single-point failures and low collection efficiency

Active Publication Date: 2021-09-07
浙江德塔森特数据技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The embodiment of the present invention effectively solves the problems that when the host computer fails or the bus is

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  • Data acquisition system based on Modbus protocol
  • Data acquisition system based on Modbus protocol
  • Data acquisition system based on Modbus protocol

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Embodiment Construction

[0035] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without creative efforts fall within the protection scope of the present invention.

[0036] see figure 1 , which is a schematic structural diagram of a data acquisition system 100 based on the Modbus protocol provided by an embodiment of the present invention. The data acquisition system 100 based on the Modbus protocol includes, for example: multiple buses 10 , multiple controllers 20 , multiple slaves 30 and multiple hosts 40 . Among them, multiple hosts 40 are electrically connected to multiple buses 10 in turn; each controller 20 is provided w...

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Abstract

The embodiment of the invention discloses a data acquisition system based on a Modbus protocol. The data acquisition system is specifically characterized in that a host sends a plurality of instructions to a plurality of controllers according to a first baud rate f1 of the host; the controller sends the received multiple instructions to the multiple slaves in a one-to-one correspondence mode at the same time; after receiving the instruction and completing the instruction, each slave sends completion data to the corresponding controller; the controller simultaneously collects the completion data of the plurality of slaves according to the second baud rate f2 of the slaves in a fixed time period; and the controller sends the read completion data of the plurality of slaves to the host through the bus according to the first baud rate f1 of the host. According to the embodiment of the invention, the problems of incapability of collection, more single-point faults and low collection efficiency caused by host faults or bus breakage are effectively solved.

Description

technical field [0001] The invention relates to the field of communication protocols, in particular to a data acquisition system based on the Modbus protocol. Background technique [0002] In the traditional Modbus serial link for data acquisition, one bus is connected to one master and multiple slaves, and Modbus communication is always initiated by the master. [0003] Although the existing Modbus communication has the situation that one host is connected to multiple slaves at the same time, and the host directly connects with multiple slaves for data transmission, but the receiving baud rate of the slaves is small, the host can only The baud rate is transmitted to each slave in turn, resulting in low collection efficiency. [0004] The existing Modbus communication also connects the master and multiple slaves through a bus, but when the master fails or the bus breaks, the data cannot be collected again, resulting in many single-point failures, which will reduce the overa...

Claims

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Application Information

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IPC IPC(8): H04L12/40
CPCH04L12/40202H04L12/40195H04L2012/40228
Inventor 蔡幸波谭小敢肖必龙施云岭
Owner 浙江德塔森特数据技术有限公司
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