High-reliability PLC data transmission method and high-reliability PLC data transmission system

A data transmission method and technology for a data transmission system, which are applied in the directions of digital transmission systems, transmission systems, data exchange networks, etc., can solve the problems of increasing circuit complexity and high cost.

Active Publication Date: 2020-09-22
北京骥远自动化技术有限公司
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  • Summary
  • Abstract
  • Description
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Problems solved by technology

This method requires an independent redundant bus, which increases the comp

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  • High-reliability PLC data transmission method and high-reliability PLC data transmission system
  • High-reliability PLC data transmission method and high-reliability PLC data transmission system
  • High-reliability PLC data transmission method and high-reliability PLC data transmission system

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[0036] In order to have a clearer understanding of the technical features, objectives and effects of the invention, specific embodiments of the invention will now be described with reference to the accompanying drawings. The same reference numerals in each figure indicate components with the same structure or similar structures but the same functions.

[0037] In this article, "schematic" means "serving as an example, instance, or illustration", and any illustration or embodiment described as "schematic" in this article should not be construed as a more preferred or advantageous Technical solutions. In order to make the drawing concise, each figure only schematically shows the parts related to this exemplary embodiment, and they do not represent the actual structure and true proportion of the product as a product.

[0038] Reference figure 1 , The present invention provides a highly reliable PLC data transmission method. The highly reliable PLC data transmission system has an iobus...

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Abstract

The invention provides a high-reliability PLC data transmission method and a high-reliability PLC data transmission system. The high-reliability PLC data transmission system is provided with an iobus(13), a controller module (10) capable of being configured on the iobus (13), a redundant main IO module (11) and a redundant standby IO module (12). A data message can be transmitted on the iobus (13). The redundant main IO module (11) and the redundant standby IO module (12) can acquire data from the iobus bus (13). Data synchronization and heartbeat transmission between the two IO modules are realized by adopting a normal iobus communication link, and the purpose of realizing data synchronization and role switching between redundant modules without depending on an additional communication path is achieved.

Description

technical field [0001] The present invention relates to module redundancy in PLC systems. The invention specifically relates to a data transmission method and a data transmission system of a highly reliable PLC. Background technique [0002] At present, when the IO module in the PLC system realizes data synchronization and module switching, it mainly realizes data synchronization and redundancy switching through the redundant bus link dedicated to the main and standby two IO modules. The specific process is: the main controller module communicates with the main The IO module communicates (exchanges data), and the main IO module sends the data sent by the main controller module to the standby IO module through the redundant bus, and sends a heartbeat signal all the time. After receiving the data sent by the main IO module, the standby IO module continues to monitor the heartbeat signal on the redundant bus. When the heartbeat signal of the main IO module cannot be monitored,...

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Application Information

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IPC IPC(8): H04L12/40G05B19/05
CPCG05B19/058H04L12/40006H04L12/40013H04L12/40195H04L2012/40208
Inventor 崔世飞李浩
Owner 北京骥远自动化技术有限公司
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