Implementation method and device for eliminating communication chip failures

A communication chip and fault elimination technology, which is applied in the direction of data exchange through path configuration, digital transmission system, electrical components, etc., can solve the problems of data bus confusion, abnormal sending and receiving data, and system failure

Active Publication Date: 2010-10-06
HANGZHOU HOLLYSYS AUTOMATION
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Problems solved by technology

[0007] When the communication module of a slave control station fails, the RS485 bus interface circuit is always in the sending state, which will cause the communication module of the slave control station to occupy the bus all the time. When the communication modules of other slave control stations on the bus are sending data, they will The data on the data bus is confused, and the communication modules of other slave control stations in the system cannot send and receive data normally, resulting in the failure of the entire system to work normally.

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  • Implementation method and device for eliminating communication chip failures
  • Implementation method and device for eliminating communication chip failures
  • Implementation method and device for eliminating communication chip failures

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Embodiment Construction

[0039] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only some, not all, embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the protection scope of the present invention.

[0040] Below at first the PROFIBUS-DP agreement communication chip breakdown realization method provided by the present invention is explained, with reference to figure 2 As shown, the method includes:

[0041] Step 201, obtaining the working status of the communication chip;

[0042] Step 202, when the working state is the data sending state, judge whether the maintenance time of the data sending state exceeds a preset time threshold, and if so, determine t...

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Abstract

The invention discloses an implementation method and device for eliminating PROFIBUS-DP protocol communication chip failures. The method comprises the following steps: acquiring the working state of a communication chip; when the working state is data transmitting state, judging whether the hold time of the data transmitting state exceeds the preset time threshold, and if so, determining that thecommunication chip goes wrong; and setting the current data transmitting state of a bus transceiver connected with the communication chip as data transmitting state. When the communication chip goes wrong and occupies the communication bus, the invention can quickly cut off the occupation of the failure chip in the communication bus.

Description

technical field [0001] The invention relates to the technical field of industrial automation, and more specifically relates to a method and device for realizing fault elimination of a PROFIBUS-DP protocol communication chip. Background technique [0002] The field bus is the lowest layer communication network used in the manufacturing field, which realizes the two-way serial multi-node digital communication between the microcomputerized on-site measurement and control instruments or equipment. PROFIBUS-DP is the underlying control network, designed for communication between automatic control systems and device-level distributed I / O, and is widely used in high-speed data transmission of distributed control systems (Distributed Control System, DCS). The central controller communicates with scattered field devices (such as I / O, drives, etc.) through high-speed serial lines. [0003] In the prior art, PROFIBUS-DP adopts RS485 transmission technology, and each slave control stat...

Claims

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Application Information

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IPC IPC(8): H04L12/24H04L12/26H04L12/40
CPCH04L12/40H04L41/0659H04L41/0681
Inventor 王常力史洪源万雪飞韩宝林张云禧
Owner HANGZHOU HOLLYSYS AUTOMATION
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