Method for calculating CANOPEN protocol CRC through redundant code words

A technology of redundant code words and protocols, which is applied in the field of calculating the CRC of CANOPEN protocol through redundant code words, can solve problems such as inapplicable coding systems, and achieve the effect of reducing costs and ensuring system security.

Active Publication Date: 2020-05-08
CASCO SIGNAL
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The existing method of calculating the CRC of the CANOPEN protocol can only be used in systems using non-coding technology, not suitable for coding systems

Method used

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  • Method for calculating CANOPEN protocol CRC through redundant code words
  • Method for calculating CANOPEN protocol CRC through redundant code words
  • Method for calculating CANOPEN protocol CRC through redundant code words

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Embodiment Construction

[0026] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0027] Principle of the present invention:

[0028] The method of calculating the CRC of the CANOPEN protocol through redundant codewords uses 32-bit codewords to calculate the CRC to ensure the correctness of the calculation process, and fills the status data (0 or 1) corresponding to the codewords into the data field of the protocol and sends them out.

[0029] The characteristics of CANOPEN protocol CRC are illustrated as follows:

[0030] The basic va...

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Abstract

The invention relates to a method for calculating CANOPEN protocol CRC (cyclic redundancy check) through redundant code words. In the method, 32-bit code words are used to calculate CRC to ensure thecorrectness of calculation processes, a data domain of a protocol to be sent out is filled with state data corresponding to the code words, and the state data corresponding to the code words is 0 or 1. Compared with technologies of the prior art, the method is advantageous in that effective communication is established among the modules adopting different technologies on the premise of ensuring safety.

Description

technical field [0001] The invention relates to a railway signal safety system, in particular to a method for calculating the CRC of the CANOPEN protocol through redundant codewords. Background technique [0002] In the railway signal safety system, there are many IO modules, which are more sensitive to cost. Therefore, some modules use coding technology to ensure safety and reduce hardware design complexity, thereby reducing hardware costs. Some modules use non-coding technology, that is, differentiation, self-inspection technology, and two-out-of-two architecture to ensure safety and operational stability. The existing method for calculating the CRC of the CANOPEN protocol can only be used in systems using non-encoding technology, and is not suitable for encoding systems. Among them, the encoding technology, that is, the state data (0 or 1) in the system is represented by a 32-bit code word that conforms to a certain verification algorithm. Contents of the invention ...

Claims

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Application Information

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IPC IPC(8): H04L1/00
CPCH04L1/004
Inventor 王建涛蒋建金陈宜航杨硕董高云孙军峰周庭梁张立鹏
Owner CASCO SIGNAL
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