Controller area network (CAN) communication protocol and application used for electric-bag or cloth-bag type dust collector control system

A CAN communication and bag filter technology, applied in the field of CAN communication protocol, can solve the problems of bus short circuit, real-time performance, poor reliability, damaged node dead chain, etc., and achieve the effect of improving reliability, easy implementation and high communication rate.

Active Publication Date: 2013-04-24
FUJIAN LONGKING
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  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0004] Shortcomings of the prior art: the fieldbus communication protocol based on the 485 network generally can only constitute a master-slave structure system, and the communication mode can only be carried out by the polling mode of the master station, and the real-time performance and reliability of the system are relatively poor and the RS -In the 485 network, when multiple nodes send data to the bus at the same time, the bus is short-circuited, thus damaging the "dead chain" phenomenon of some nodes

Method used

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  • Controller area network (CAN) communication protocol and application used for electric-bag or cloth-bag type dust collector control system
  • Controller area network (CAN) communication protocol and application used for electric-bag or cloth-bag type dust collector control system
  • Controller area network (CAN) communication protocol and application used for electric-bag or cloth-bag type dust collector control system

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Experimental program
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Embodiment

[0038] 1. Agreement principles

[0039] Following the CAN2.0B specification, adopting the method of "source→destination", each node module (or lower computer) has its own fixed identification address. This agreement can complete the following functions:

[0040] (1) broadcast information;

[0041](2) The connection between the host and each node module;

[0042] (3) Information exchange between the host and each node module.

[0043] This protocol adopts the principle of frame priority to assign identifiers. The upper four bits of each frame identifier indicate the frame type. Different frame types have different priorities. The priority determines the order in which various information frames are sent under the same circumstances. The protocol The 29-bit identifiers in are assigned as follows:

[0044] Frame type (4 bits) + reserved bit (1 bit) + sender type (1 bit) + destination address (7 bits) + source address (7 bits) + packet number (9 bits).

[0045] For all comman...

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Abstract

The invention relates to a controller area network (CAN) communication protocol used for an electric-bag or cloth-bag type dust collector control system, and provides a communication debug method of a system CAN bus based on the CAN communication protocol and the electric-bag or cloth-bag type dust collector control system based on the CAN communication protocol. Instantaneity of data communication among nodes of a network formed by the CAN bus is strong, a redundant structure is easy to form, and reliability and flexibility of a system can be improved. When the system is faulty, a plurality of nodes send data to the bus at the same time so that short circuit occurs in the bus easily, and some nodes are damaged. In addition, a CAN node has the function of closing output automatically when errors are severe so that operation of other nodes on the bus is not influenced, the phenomenon that some nodes going wrong cause the bus to be in a deadlock state can be avoided. Meanwhile, compared with other on-site buses, the CAN bus has the advantages of being high in communication speed, easy to achieve, high in cost performance and the like.

Description

technical field [0001] The present invention relates to a CAN communication protocol, more specifically, relates to a CAN communication protocol used in the electric bag or bag filter control system, and the present invention also provides a communication debugging method for the CAN bus of the system based on the CAN communication protocol, And a CAN communication protocol-based electric bag or bag filter control system. Background technique [0002] Fieldbus is a bidirectional, serial, multi-node digital communication technology that is applied to the production site and implements bidirectional, serial, and multi-node communication between field devices and between field devices and control devices. At present, there are more than forty kinds of field buses in the world. At present, the bag area controllers in engineering projects basically use PLC. The PLC basically uses the fieldbus protocol based on the 485 network to communicate with the remote site. [0003] CAN i...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H04L12/40H04L29/06G05B19/418
CPCY02P90/02
Inventor 余新良谢小杰邱江新林明俞
Owner FUJIAN LONGKING
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