JPH01295338A - On switch control system for separation display flag of duplex system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Summary] This invention relates to a disconnection display flag on switching control method for a duplex system that performs on/off control of a disconnection control flag based on abnormality detail processing for a component of a diagnostic abnormality, and is intended to improve the reliability of the duplex system. In a redundant system that uses its own diagnostic system to diagnose system components in other systems and uses the diagnosis results to control the on-switching of disconnection display flags for faulty components, A determination means for examining the degree of influence of the cause of the failure that caused the diagnosis to be abnormal has on the system, and a switching means for switching on a disconnection display flag for a faulty component determined in accordance with an output of the determination means. Configured.

[Industrial application field]

The present invention relates to a disconnection display flag-on switching control method for a duplex system that performs on/off control of a disconnection control flag by abnormality detail processing for a diagnostic abnormality component.

Switching systems and the like have a duplex configuration because of the need to maintain a high degree of reliability. and,
In the duplex configuration, each component to be diagnosed in the backup system is diagnosed by the active system, and the defective component is removed from the backup system in order to maintain the reliability of the system. There is.

[Conventional technology]

As shown in FIG. 7, a conventional switching system has a duplex configuration including a working system and a standby system having exactly the same configuration. A diagnostic system is built in the redundant system to enable the active system to periodically or irregularly diagnose each component of the standby system so that the standby system can perform its original functions.

When this diagnostic system is started, the component to be diagnosed is selected (Sl in Figure 8), and the diagnostic program and data corresponding to the selected component are selected (Figure 9).
is selected (82 in FIG. 8). The diagnostic program and data are read from the file memory 12A to the main memory 16B via the channel controller 14A under the control of the active central controller 10A (33 in FIG. 8). A central control unit 10 executes the diagnostic program.
A uses the data to diagnose the component to be diagnosed (34 in FIG. 8). If the diagnosis is normal (35 normal in Figure 8), the detachment display flag for the component is set to "0" and the component to be diagnosed is incorporated into the backup system (36 in Figure 8). .On the other hand, if the diagnosis is abnormal (
85 error in Figure 8), set the disconnection display flag for the component to be diagnosed to "1" and disconnect the component to be diagnosed from the system (37 in the system in Figure 8)
. Also, the failure is displayed.

[Problem that the invention seeks to solve]

In this conventional system, when a fault in a component diagnosed by a diagnostic program is detected, that fact alone is used to immediately disconnect the component from the system.

Therefore, even if some of the components to be disconnected that are determined to be faulty by the above diagnosis are capable of online operation, that component will be disconnected from the system, so by disconnecting the component, As a result, the reliability of the system as a whole is rather low.

The present invention was created in view of the above problems, and an object of the present invention is to provide a disconnection display flag-on switching control method for a duplex system that contributes to improving the reliability of the duplex system.

[Means for solving problems]

FIG. 1 shows a block diagram of the principle of the present invention. As shown in FIG. 1, the present invention provides an in-house diagnostic system (1° or 1.
) diagnoses the system components of the other system (1 or 1°) and uses the diagnosis results to control the on switching of the disconnection display flag (31 or 30) for the faulty component. , for each prefecture (9, 11), determining means (5, 5I) for examining the degree of influence on the system of the cause of the failure that caused the diagnosis to be abnormal, and an output of the determining means (50, 51). and switching means (70, 71) for switching on a disconnection indication flag (31, 30) for a faulty component determined accordingly.

[For production]

In the redundant system, the determining means determines whether or not the component should be separated and processed based on the diagnosis result obtained by executing the diagnostic program for the component to be diagnosed which is sequentially executed by starting the diagnostic system. It is done by 5. According to the determination, switching on of a disconnection display flag provided in the duplex system is controlled.

Therefore, even if a fault is detected in a component, the component is not uniformly separated from the system as in the past, which improves the reliability of the system.

〔Example〕

An embodiment of the present invention will be described with reference to FIGS. 2 to 5. This embodiment is an example implemented in the duplex switching system shown in FIG.

File memory 12A of this embodiment system.

12B stores a diagnostic program as shown in FIGS. 3 and 4, as well as test data and separation device management data. FIG. 2 shows the processing flow of the diagnostic program. Further, the contents of diagnostic items A to A in FIG. 4 are shown in Table 1.

(Hereinafter, blank space) Table 1 In the system configuration of this embodiment, the central controller 10A
1 file memory 12A, channel control device 14A, main memory 16A1 The corresponding processing parts indicated by SO□ and S2-34 in FIG. 2 are the diagnostic system 1 of the O-system system 9 in FIG.
0, central control unit 10B, file memory 12
B, the channel control device 14B, the main memory 16B, and the corresponding processing parts indicated by SO2 and S2-34 in FIG. 2 correspond to the diagnostic system 11 of the 1-system system 11 in FIG.

Furthermore, the detachment display flags 30, 3. of FIG. are provided in the main memory 16A, 16B of the corresponding system. Central controller 10A, file memory 12A, channel controller 14A, main memory 16A, 38. in FIG. S9. Sl
The corresponding processing portion shown in S13 corresponds to the determination means 50 of the 0-system system shown in FIG. ．． The corresponding processing parts shown in Sll and S13 are the determination means 5 of the 1-system system shown in FIG.
Corresponds to 1. In addition, the central controller 10A, the main memory 16
A, SIo in FIG. 2, 312, S14. The corresponding processing part indicated by S15 is the switching means 7 of the 0-system system shown in FIG.
0, central controller 10B, main memory 16B, 310.312. Corresponding processing parts 314 and 315 correspond to the switching means 71 of the 1-system system shown in FIG.

The operation of this diagnostic system configuration will be explained below.

The following explanation will be based on an example in which the selected component to be diagnosed is a central control unit (CC).

In the processing in the current system, when the diagnostic system is activated (30. in FIG. 2), first the separation display flag of the component to be separated is cleared (SO□ in FIG. 2). Then, in the same manner as before, the central control unit is selected, its diagnostic program and data are selected, they are read into the main memory, and the diagnosis is executed (see 32-34 in Figure 2).
This is the same as 32 to S4 in FIG. 8)]. If this execution reveals that the diagnosis is normal (normal at 35 in FIG. 2), the component is incorporated into the backup system (36 in FIG. 2).

Conversely, if the diagnosis is abnormal, the central controller management data is read from the file memory 12A into the main memory 16A via the channel controller 14A and the central controller 10A (38 in FIG. 2). Then, the central controller (CC) I
Detailed processing for OB abnormality diagnosis begins.

First, the cause of the failure that caused the diagnostic abnormality is diagnostic item A.
A determination is made as to whether or not this has occurred (39 in FIG. 2). If the determination is negative, the process immediately proceeds to step Sll, but if it is positive, "1°" is written to the CC disconnection display flag (located in the main memory 16A) in step 310, and the process proceeds to step S11 (see also FIG. 5). (See below.)

If the determination in step Sll is negative, the process immediately proceeds to step 313, but if it is affirmative, in step s12 M
The M disconnection display flag (located in the main memory 16A) is set to "'".
Write l'' and proceed to step s13.Step 31
If the determination in step 3 is negative, the process advances to step S15, but
If affirmative, "1°" is written in the CHC disconnection display flag in STELLA 7'S14, and in step S15, processing is performed for the diagnostic items of the central control unit, and the detailed diagnostic abnormality processing is completed.

In this way, even if an abnormality occurs in the diagnosis of the central control unit, the entire central control unit is not immediately disconnected from the system, and the reliability of the system is improved.

FIG. 6 shows the central control unit 1 for the channel control unit.
This is a diagram illustrating fault isolation similar to 0B. The diagnostic item A'' indicates that the target to be disconnected is the channel control device, the diagnostic item B° indicates that the target to be disconnected is the main memory ink face function, and the diagnostic item C' indicates that the target to be disconnected is the center side? 111 device interface function, and the diagnosis item D° indicates that the target to be disconnected is the input/output bus interface function [therefore, all devices connected to the input/output bus (file memory (FM), typewriter (TYP)
), magnetic tape unit (MT), etc.).

Regarding other components, in the same manner as described above, if there is no need to disconnect them as faulty components in system operation, the above-mentioned disconnection display flag is not set. This improves the reliability of the entire system.

In the above embodiments, a duplex exchange system has been described, but the present invention can also be implemented in other duplex configuration systems.

〔Effect of the invention〕

As described above, according to the present invention, rather than directly separating the component to be diagnosed that is diagnosed as abnormal from the system, all or - Since the section is separated from the system, it is possible to suppress the occurrence of double failures and the like, which helps improve the reliability of the system.

[Brief explanation of the drawing]

Fig. 1 is a principle block diagram of the present invention, Fig. 2 is a diagram showing the diagnostic processing flow of an embodiment of the present invention, and Fig. 3 is a diagram showing the diagnostic processing flow of an embodiment of the present invention.
Figure 4 is a detailed diagram of the contents of the file memory, Figure 4 is a detailed diagram of management data for the central control unit, Figure 5 is an illustrative diagram of the target of the central control unit to be separated by diagnosis, Figure 6 is an illustrative diagram of the target to be separated by the diagnosis of the channel control device that is the subject of diagnosis; FIG. 7 is a configuration diagram of the redundant switching system; FIG. 8 is a diagram showing the diagnosis method of the conventional redundant switching system; 4 and 7, 1o is an O-system diagnostic system (central controller 10A, file memory 12
A, channel control device 14A, main memory 16A, corresponding processing parts shown as S02 and S2-34 in FIG. Main memory 16B, Figure 2 (7) S O2 and 32-54
30, 31 are detachment display flags (main memory 16A, 16B), 50, 51 are determination means (central controller 10A, file memory 12A, channel controller 14A, main memo IJ1)
6A, Figure 2 (7) S8. S9,311. Corresponding processing part shown in S13; central control unit 10B, file memory 1
2B, channel control device 14B, main memory 16B, second
Figure (7) S8. S9. Sll. 313), 70 and 71 are switching means (central control unit 10A, main memory 16A, FIG. 2 (7) S1'O, S1.2.S
14° Corresponding processing section indicated by S15; central control unit 10
B, main memory 16B, FIG. 2 (7) 310. S12. S
14. (corresponding processing portion shown in S15).

Claims (1)

[Claims] Diagnose the system components of the other system by the diagnostic system of the own system, and use the diagnosis results to control the on-switching of disconnection display flags (3_0, 3_1) for the faulty components. In a redundant system, determining means (5_0, 5_1) for checking the degree of influence on the system of the cause of the failure that caused the diagnosis to be abnormal; and a fault component determined according to the output of the determining means (5_0, 5_1). Detachment display flag (3_1, 3_
switching means (7_0, 7_1) for switching on 0)
A disconnection display flag-on switching control method for a duplex system, characterized by providing the following.