JPH0981421A - Fault information sampling system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a fault information sampling system which is capable of collecting fault information even when a fault is developed in a maintenance diagnostic device itself. SOLUTION: When the fault information developed in a central processing unit 1 is detected in a fault information register 5, an interruption is made on a log sampling control part 4 via a shift register 6, an OR circuit 7 and an interruption register 8. At almost the same time as this interruption, the interruption is made on also a shift output control part 20 via an interruption register 21. Because the log sampling control part 4 makes the contents of the fault information register 5 be stored in a log information storage part 3 and the shift out control part 20 makes fault information be stored in a log information storage part 23 via the shift register 6, by these interruptions, the reading out of the other side becomes possible even if a fault is developed in either one of the storage parts 3 and 23.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a failure information collecting system, and more particularly to a failure information collecting system having a function of collecting failure information when a failure occurs in a central processing unit.

[0002]

2. Description of the Related Art A maintenance diagnostic device provided separately from a central processing unit is known as a fault information collecting system of this type. However, if a failure occurs in the failure information storage unit provided in the maintenance diagnosis apparatus, the failure information cannot be read.

As means for solving such a drawback, Japanese Patent Laid-Open No. 5-108419 discloses information for storing failure information in a second failure information storage section in the apparatus itself when a failure occurs in the failure information storage section. A collection method is disclosed, and as a technique similar to this, Japanese Patent Laid-Open Nos. 63-16338 and 63-12036 are disclosed.

[0004]

However, the conventional fault information collecting system has a drawback that the fault information cannot be collected when the maintenance diagnostic device itself has a fault.

Therefore, an object of the present invention is to provide a fault information collection system capable of collecting fault information even when a fault occurs in the maintenance diagnostic device itself.

[0006]

In order to solve the above-mentioned problems, the present invention relates to a failure information detecting means for detecting failure information generated in its own device, and failure information detected by this failure information detecting means is stored. First storage means, sending means for sending the fault information detected by the fault information detecting means to the outside, and interrupt signal generating means for generating an interrupt signal when the fault information is detected. , A first device including a first control means which is activated by the interrupt signal and stores the failure information of the failure information detecting means in the first storage means, and the failure information sent from the sending means. The second storage means to be stored and the interrupt signal output from the interrupt signal generation means are input, and the failure information activated by the interrupt signal and transmitted from the transmission means is stored in the second storage means. Second to be stored in And a second device and a control unit,
It is characterized by consisting of.

[0007]

BEST MODE FOR CARRYING OUT THE INVENTION An interrupt signal is generated based on fault information detected by a first device, and the interrupt signal activates a first control means. Then, the first control means stores the failure information in the first storage means.

On the other hand, this interrupt signal activates the second control means in the second device. Then, the second control means receives the failure information from the first device and stores the failure information in the second storage means.

Embodiments of the present invention will be described below with reference to the accompanying drawings. FIG. 1 is a configuration diagram of an embodiment of a fault information collection system according to the present invention.

The fault information collecting system comprises a central processing unit 1 and a diagnostic control unit 2.

The central processing unit 1 controls the log information of the central processing unit 1, that is, the log information storage unit 3 in which the information indicating the internal state of the central processing unit 1 is stored, and the log data collection of the central processing unit 1. The log collection control unit 4 in which software exists, the fault information register 5 that detects a fault in the central processing unit 1 and holds detailed fault information, and the diagnostic control unit 2 shifts out the fault information. Of the shift register 6, the OR circuit 7 that outputs an interrupt signal based on the failure information held in the shift register 6, and the interrupt signal output from the OR circuit 7 are stored, and a log is collected based on the interrupt signal. Fault interrupt register 8 for activating the control unit 4
And a fault interrupt register hold unit 9 for suppressing the output of the interrupt signal again after the output of the interrupt signal.

Now, when a failure occurs in the central processing unit 1, on the failure information register 5 and the shift register 6,
A bit indicating the fault type, for example, "1" is set. That is, if no failure occurs, the contents of the failure information register 5 and the shift register 6 are all "0".

Therefore, if the parallel data output from the shift register 6 includes at least 1-bit "1", the OR circuit 7 outputs a high level signal "1". By detecting that "1" is output from 7, it is possible to know that a failure has occurred in the central processing unit 1. Therefore, "1" output from the OR circuit 7 can be used as a fault interrupt signal.

During the shift operation of the shift register 6, failure information is set in the shift register 6 after the shift operation is completed.

The fault information register 5 can be read by the log collection control unit 4.

The diagnostic control unit 2 includes a shift-out control unit 20 in which software for collecting log data of the central processing unit 1 and the central processing unit 1 have a failure,
The interrupt signal output from the OR circuit 7 of the central processing unit 1 is stored, and the shift-out control unit 2 is based on this interrupt signal.
From the fault interrupt register 21 that activates 0, the fault interrupt register hold unit 22 that prevents the interrupt signal from being output again after the interrupt signal is output, and the shift register 6 of the central processing unit 1. It has a log information storage unit 23 that receives fault information that is shifted out and stores the fault information.

Next, the operation of the fault information collecting system will be described with reference to the flow chart. FIG. 2 is a flowchart showing the operation of the fault information collection system.

First, when a failure occurs in the central processing unit 1 (S1), a bit indicating a failure type is set in the failure information register 5 (S2), and the bit is also set in the shift register 6 (S3). .

Next, since at least one bit of all the bits set in the shift register 6 is "1", all the bits are passed through the OR circuit 7,
A high level signal "1" is output from the OR circuit 7. This high level signal "1" is hereinafter referred to as "fault interrupt path P".

The fault interrupt path P is stored in the fault interrupt register 8, and the fault interrupt path P is stored in the fault interrupt register 8, so that a fault interrupt occurs in the log collection control unit 4.

When a fault interrupt occurs in the log collection control unit 4, the fault interrupt register 8 is held by the fault interrupt register holding unit 9, and a fault interrupt occurs again in the log collection control unit 4 during log processing. This is suppressed (S4).

At the same time as this, the fault interruption path P
Is stored in the failure interrupt register 21 of the diagnostic control device 2, and the failure interrupt path P is stored in the failure interrupt register 21, so that the failure interrupt occurs in the shift-out control unit 20.

When a fault interrupt occurs in the shift-out control unit 20, the fault interrupt register 21 is held by the fault-interrupt register holding unit 22, and a fault interrupt occurs again in the shift-out control unit 20 during log processing. This is suppressed (S4).

Next, when a failure interrupt occurs in the log collection control unit 4, the log collection software is started in the log collection control unit 4, and this software executes the failure information register 5
Is stored in the log information storage unit 2 as log information (S5).

On the other hand, when a failure interrupt occurs in the shift-out control section 20, the log-out software is started in the shift-out control section 20, and this software causes failure information (shift path Q) from the shift register 6 of the central processing unit 1. ) Is shifted out, and the failure information is stored as log information in the log information storage unit 23 (S6).

The steps S5 and S6 are processed almost at the same time.

[0027]

According to the present invention, the fault information detected by the first device is stored in both the first storage means in the first device and the second storage means in the second device. Since it is configured to store data at almost the same time, a failure occurs in the second device,
Even if the failure information cannot be read from the storage means of
The failure information can be read from the first storage means.

Similarly, if a failure occurs in the first device,
Even if the failure information cannot be read from the storage means of
Fault information can be read from the second storage means.

[Brief description of drawings]

FIG. 1 is a configuration diagram of an embodiment of a fault information collection system according to the present invention.

FIG. 2 is a flowchart showing an operation of the fault information collecting system.

[Explanation of symbols]

 1 Central Processing Unit 2 Diagnostic Control Unit 3,23 Log Information Storage Unit 4 Log Collection Control Unit 5 Fault Information Register 6 Shift Register 7 OR Circuit 8,21 Fault Interrupt Register 9,22 Fault Interrupt Register Hold Unit 20 Shift Out Control Department

Claims (4)

[Claims] 1. A fault information detecting means for detecting fault information generated in the device, a first storing means for storing the fault information detected by the fault information detecting means, and the fault information detecting means. Sending means for sending the detected failure information to the outside, interrupt signal generating means for generating an interrupt signal when the failure information is detected, and failure of the failure information detecting means activated by the interrupt signal A first device including first control means for storing information in the first storage means, and a second device for storing fault information sent by the sending means
Second storage means and the interrupt signal output from the interrupt signal generation means are input, and the failure information activated by the interrupt signal and transmitted from the transmission means is stored in the second storage means. And a second device including a control means of the fault information collecting system. 2. The interrupt information is made up of a plurality of bits including a bit indicating a failure type, and all bit outputs of the plurality of bits are output through the interrupt signal generating means composed of an OR circuit to generate an interrupt. The fault information collecting system according to claim 1, wherein a signal is generated. 3. The fault information collection according to claim 1 or 2, further comprising: an interrupt inhibiting unit that inhibits generation of a second interrupt signal during execution of interrupt processing by the interrupt signal. system. 4. The first device is a central processing unit,
The fault information collecting system according to claim 1, wherein the second device is a diagnostic control device.