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PLC system capable of achieving efficient transmission and data transmission method thereof

A data transmission method and technology for data transmission, applied in general control systems, control/regulation systems, instruments, etc., can solve problems such as limiting the rate too high, short messages, and too large data packets.

Active Publication Date: 2020-09-25
北京骥远自动化技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The efficiency of this method is very low, especially when the data does not change for a long time
In the multi-master contention access mode, any module can initiate communication when needed, but the rate limit of the arbitration mechanism cannot be too high, and the data packet cannot be too large
Therefore, this method has the problems of low rate and short message, especially when dealing with large amounts of data, the efficiency is low

Method used

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  • PLC system capable of achieving efficient transmission and data transmission method thereof
  • PLC system capable of achieving efficient transmission and data transmission method thereof
  • PLC system capable of achieving efficient transmission and data transmission method thereof

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Embodiment Construction

[0039] In order to have a clearer understanding of the technical features, purposes and effects of the invention, the specific embodiments of the present invention are now described with reference to the accompanying drawings, in which the same reference numerals represent components with the same or similar structures but the same functions.

[0040] In this article, "schematic" means "serving as an example, example or illustration", and any illustration or implementation described as "schematic" should not be interpreted as a more preferred or more advantageous Technical solutions. In order to keep the drawings concise, the drawings only schematically show the parts related to this exemplary embodiment, and they do not represent the actual structure and true proportion of the product.

[0041] figure 1 It is a schematic circuit diagram for explaining the PLC system bus transmission method. refer to figure 1 , the present invention provides a data transmission method capab...

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Abstract

The invention provides a PLC system capable of achieving efficient transmission and a data transmission method thereof. The PLC system capable of achieving efficient transmission is provided with a first bus (11) and a second bus (12). The PLC system comprises a controller module (10) and a transmission IO module (13) which are respectively configured on a first bus (11) and a second bus (12). Thefirst bus (11) can transmit data messages. The second bus (12) is capable of obtaining an occupancy message. And the controller module (10) and the transmission IO module (13) can send out an occupation message. The first bus (11) is a single main polling mode bus. The second bus (12) is a multi-master contention access system bus. According to the invention, the advantages of different buses inthe heterogeneous bus are utilized, and the performance and reliability of the bus are effectively improved.

Description

technical field [0001] The present invention relates to bus transmission in PLC system. The invention specifically relates to a PLC system capable of realizing high-efficiency transmission and a data transmission method thereof. Background technique [0002] In the PLC field bus control system, the field bus plays the role of connecting the controller and various input and output modules. The performance and reliability of the field bus directly determine the performance and reliability of the entire PLC control system. However, most of the existing technical solutions use a transmission medium to realize bus transmission, that is, a single-master polling method or a multi-master contention access method. In the single-master polling mode, there is a question-and-answer mode between the main control module and the input and output modules. The input and output modules will not actively send data, and must wait until the main control module asks itself before responding. T...

Claims

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Application Information

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IPC IPC(8): G05B19/05
CPCG05B19/054G05B2219/1103
Inventor 李浩崔世飞
Owner 北京骥远自动化技术有限公司