Method for preserving abnormal state information of control system

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...

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