Method for preserving abnormal state information of control system

A control system and abnormal state technology, applied in the field of communication, can solve problems such as data loss, unfavorable positioning analysis, etc., to achieve the effect of avoiding loss, convenient positioning analysis, and improving usability

Inactive Publication Date: 2008-06-18
王国忠
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] The technical problem to be solved by the present invention is to overcome defects such as data loss caused by direct system reset and restart in the triggering process of the existing watchdog circuit, which is not conducive to the positioning and analysis of problems, and provide a method for detecting abnormalities in the control system The method of saving status information, so as to avoid the loss of important information, and facilitate the location and analysis of equipment failures

Method used

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  • Method for preserving abnormal state information of control system

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Embodiment Construction

[0017] Below according to accompanying drawing and embodiment the present invention will be described in further detail:

[0018] After analyzing a large number of watchdog trigger problems, the system watchdog is triggered. In many cases, it is not a CPU crash or other hardware problems, but a software design problem that causes the program to wait for an abnormal condition in a certain module. Form an endless loop. Because the timer interrupt is shielded, the program cannot clear the dog, and the watchdog overflow will cause the system to reset.

[0019] The invention provides a method for saving the abnormal state information of the control system, which can provide a means for saving system failures when the equipment enters this abnormal state, and facilitates the data collection and troubleshooting of difficult-to-reproduce reset problems during equipment maintenance. Rapid analysis and positioning of repeated reset and restart fault problems, and also maintains the fun...

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Abstract

It is a method to store the abnormal state information of the control system, which comprises the following steps: to set at least two degrees of counter in the watchdog system, and when the counter reaches the front degree value, the system triggers the non-shielding interval; the system stores the information easy to loose of the control system by use of the non-shielding interval; when the counter reaches the back degree value, the system triggers the reset signal to reset the control system.

Description

technical field [0001] The invention relates to the field of communication technology, in particular to a method for storing abnormal state information of a control system. Background technique [0002] Carrier-level communication products have high requirements on system reliability. In addition to strict requirements on equipment MTBF, they also have strict requirements on equipment failure recovery time. Generally speaking, system design uses hardware or software gatekeepers. Dog technology is used to monitor system abnormalities, which can automatically restart the system after a failure and restore normal operation. [0003] The principle of the watchdog is to use a hardware or software counter to set a counter overflow value. Before the counter counts to the overflow value, the software must regularly or have a special task to clear the counter. If the counter is not cleared before the counter overflows, It can be considered that the main control system software is ab...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G06F11/30G06F1/24
Inventor 邓兴
Owner 王国忠
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