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EPA protocol-based industrial Ethernet communication method supporting real-time and non-real-time application

A communication method, non-real-time technology, applied in the direction of data exchange network, digital transmission system, electrical components, etc., can solve the problems of reducing system reliability, requiring too high computing resources of network node equipment, and unable to meet the requirements of automatic communication, etc. To achieve the effect of improving real-time performance, reducing load, and reducing load

Inactive Publication Date: 2011-04-13
CHONGQING UNIV OF POSTS & TELECOMM
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] However, the existing industrial Ethernet technology is difficult to apply in automatic control based on motion control, and cannot meet the high real-time requirements of motion control, and the requirements for computing resources of network node devices are too high, which greatly increases the The hardware cost and technical complexity of node devices reduce the reliability of the system
There is no industrial Ethernet data communication method supporting real-time and non-real-time automation applications in the prior art, which cannot meet the requirements of industrial process automation communication, especially the high real-time problem in motion control

Method used

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  • EPA protocol-based industrial Ethernet communication method supporting real-time and non-real-time application
  • EPA protocol-based industrial Ethernet communication method supporting real-time and non-real-time application
  • EPA protocol-based industrial Ethernet communication method supporting real-time and non-real-time application

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Embodiment Construction

[0019] Preferred embodiments of the present invention will be described in detail below.

[0020] According to the different response time of EPA control system, the communication between different devices in EPA system is divided into real-time communication and non-real-time communication. in:

[0021] Real-time communication refers to the communication in which the system has very strict requirements on response time, and its typical response time is usually between 5 and 10ms. EPA real-time data refers to data related to the process, such as the measured value and control value that need to be transmitted according to the control cycle of the control loop, or the data that needs to be updated periodically between the input and output of the function block.

[0022] Non-real-time communication refers to the communication in which the system has lower requirements on response time, and its typical response time is usually around 100ms. EPA non-real-time data refers to TCP / ...

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Abstract

The invention relates to the fields of automation and data communication, in particular to an industrial Ethernet data communication method supporting real-time and non-real-time automatic application, and can solve the problem to achieve highly real-time communication of an industrial Ethernet in motion control. The method comprises that: when real-time data is generated in the real-time application process of an environmental protection agency (EPA) field device, the data enters a real-time channel, and a real-time data identifier is added at the tail of the whole data frame through the real-time channel; after receiving a real-time data message, the EPA field device begins to scan from the tail of the whole data frame and judges whether the real-time data identifier is identified as the real-time data, if so, the data frame is transmitted into an EPA real-time data channel; and when the EPA field device receives or transmits a non-real-time data message, the non-real-time data is processed by a standard transmission control protocol (TCP) user datagram protocol (UDP) / internet protocol (IP) protocol entity and an EPA communication dispatching management entity.

Description

technical field [0001] The invention relates to the field of automation and data communication, in particular to an industrial Ethernet data communication method supporting real-time and non-real-time automation applications. Background technique [0002] Industrial Ethernet technology for industrial measurement and control systems integrates automation, communication and computer technologies. It applies the ISO / IEC8802-3 and TCP / IP protocols of computer networks to industrial automation communications, and integrates Several sensors, actuators, controllers, and workstations are connected with Ethernet, so that all devices work together to complete the measurement and control of industrial production processes. [0003] However, the existing industrial Ethernet technology is difficult to apply in automatic control based on motion control, and cannot meet the high real-time requirements of motion control, and the requirements for computing resources of network node devices a...

Claims

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Application Information

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IPC IPC(8): H04L12/56H04L29/06
Inventor 王浩王平刘杰郑军武贵路高毅欣
Owner CHONGQING UNIV OF POSTS & TELECOMM
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