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A System Applied to Communication Expansion of Control System

A technology for control systems and communication links, applied in transmission systems, digital transmission systems, duplex signal operation, etc. The effect of network layout complexity, less logic resource consumption, and reduced probability of network conflict

Active Publication Date: 2022-03-11
NANJING SCIYON AUTOMATION GRP
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

These solutions are based on the premise of increasing the complexity of the system. In addition, the level of productization of Layer 2 Ethernet switching chips in China is not high.

Method used

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  • A System Applied to Communication Expansion of Control System
  • A System Applied to Communication Expansion of Control System
  • A System Applied to Communication Expansion of Control System

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Embodiment Construction

[0026] The present invention will be further described below in conjunction with the accompanying drawings.

[0027] The invention is a system applied to the communication expansion of the control system, which can be applied to the occasion of industrial automation controllers with high reliability requirements, short communication controller period and high real-time requirements. The reliability of the entire system is improved through equipment redundancy and link redundancy. The use of 100M Ethernet communication can meet the requirements of short communication cycle and high real-time requirements of industrial automation control, and can achieve higher controller accuracy. On the other hand, the number of external interfaces of the controller is limited, and more network expansion modules can be cascaded through the network interface to enrich the functions of the controller. The ring network topology also reduces the complexity of system applications.

[0028] Such as ...

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Abstract

The invention discloses a system for communication expansion of a control system, which includes a controller module, a network node and a communication link. The controller module is serially connected to several network nodes through the communication link, and the terminal network node is connected to controller modules and form a ring network topology. The present invention is used for the control system of redundant network communication, realizes cascading of multiple expansion modules through the network interface, and enriches the functions of the controller system; the forwarding mode of the message cache can realize the full-duplex communication between the controller unit and the network expansion module ;Support forwarding messages at the same time during the storage process, and the message delay is small; the isolation between redundant communication links enables the system to support a ring network topology without adding network switching devices, making the network layout simpler and more reliable.

Description

Technical field: [0001] The invention relates to a system applied to communication expansion of a control system. Background technique: [0002] In the field of industrial automation that requires high reliability, equipment redundancy and communication link redundancy will be used to improve the reliability of the entire system. Ethernet is an open and standardized LAN technology. The IEEE802.3 Ethernet technology standard was formulated by IEEE, which stipulates the physical medium, signal interface and medium access layer protocol. Various manufacturers design physical layer chips (PHY) that meet different physical media according to this standard. The twisted pair wires and optical fibers commonly used in the industry can meet different communication requirements of tens of meters, several kilometers or tens of kilometers. At the same time, the current cost A very low general-purpose microprocessor (MCU) integrates a signal interface (MII) and a media access controller ...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04L12/42H04L12/437H04L1/22H04L5/16H04L5/14
CPCH04L12/42H04L12/437H04L1/22H04L5/16H04L5/14
Inventor 祖利辉辛克廷杨磊陈闯
Owner NANJING SCIYON AUTOMATION GRP
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