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Automation equipment communication method based on CAN bus

A technology of CAN bus and automation equipment, applied in the field of communication of automation equipment based on CAN bus

Inactive Publication Date: 2015-02-04
AEROSPACE SCI & IND SHENZHEN GROUP
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the CAN standard does not clearly stipulate the identification field in the arbitration domain, and the allocation strategy of the identification is completely determined by the application, so that the distribution network automation terminal cannot perform real-time data packets according to the priority requirements of the system itself. , multitasking

Method used

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  • Automation equipment communication method based on CAN bus
  • Automation equipment communication method based on CAN bus
  • Automation equipment communication method based on CAN bus

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Embodiment Construction

[0018] In order to make the object, technical solution and advantages of the present invention clearer, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

[0019] A CAN bus-based automation equipment communication method is used for communication between a sender and a receiver of the automation equipment. In the present invention, the automation equipment can be a power distribution automation terminal, and can also be a multi-master system and a real-time system using CAN bus communication. In this embodiment, the communication method is described in detail by taking a power distribution automation terminal as an example.

[0020] In this embodiment, the automation device communication method is based on the CAN bus protocol, and the CAN data frame...

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Abstract

The invention discloses an automation equipment communication method based on a CAN bus. The communication method is based on a CAN bus protocol, and an application layer protocol employs a CAN data frame with an expansion frame format. An arbitration domain comprises a priority identification domain, a source address domain, a target address domain, a source task number domain and a target task number domain. The communication method comprises the following steps that the CAN data frame sent by a sender via the CAN bus is received; priority of the CAN data frame is acquired; whether the priority of the CAN data frame is the highest priority is judged; if the judgment result is yes, data interaction is performed between the CAN data frame and a CAN application communication layer via a high-speed communication mode; and if the judgment result is no, the CAN data frame is sent to a queue with the corresponding priority, and data interaction is performed between the CAN data frame and the CAN application communication layer via an information queue mode. According to the automation equipment communication method based on the CAN bus, real-time and multitask processing can be performed on a data message.

Description

technical field [0001] The invention relates to the technical field of power supply and distribution, in particular to a CAN bus-based automation equipment communication method. Background technique [0002] With the rapid development of distribution automation, distribution terminal units (Distribution Terminal Unit, DTU) are widely used. Multiple distributed acquisition and monitoring units in the distribution network automation terminal need to communicate with each other to realize the data exchange of collected data and monitoring results. The Controller Area Network (CAN) bus is used in the communication of distribution automation terminals due to its high performance, high reliability and real-time performance. The CAN bus communication interface integrates the physical layer and data link layer functions of the CAN protocol, which can complete the framing processing of communication data, including bit filling, data block encoding, cyclic redundancy check, priority ...

Claims

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Application Information

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IPC IPC(8): H04L12/927H04L12/861G05B19/418H04L47/80
CPCY02P90/02
Inventor 曹建平
Owner AEROSPACE SCI & IND SHENZHEN GROUP
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