JPH0496146A - External monitoring malfunction preventing system - Google Patents

Abstract

PURPOSE:To prevent an invalid restart actuation in the case an information processor and an external monitor are not connected normally by inhibiting a transfer of a restart actuating signal to the information processor, in the case it is detected that a monitoring signal from the information processor is not returned. CONSTITUTION:A connecting path monitoring means 400 provided on an external monitor 200 monitors a monitoring signal (s) which is always returned through a connecting path 300 from an information processor 100, and in the case it is detected that the monitoring signal (s) is not returned, a transfer of a restart actuating signal (ema) to the information processor 100 is inhibited. In such a way, in the case the connecting path is not connected normally, it can be prevented that the external monitor misconceives an operation of the informa tion processor as abnormal and executes an invalid restart actuation, and reliabil ity and a service property of the information processor concerned can be im proved.

Description

[Detailed Description of the Invention] [Summary] Regarding an external monitoring malfunction prevention method in an external monitoring device that monitors the operating state of an information processing device, if the information processing device and the external monitoring device are not connected normally, In order to prevent the information processing device from restarting invalidly, a startup signal is periodically sent to the information processing device to be monitored via the connection path, and the information processing device receives the signal. The operating state of the information processing device is monitored by receiving a predetermined response signal sent back in response to the activated activation signal, and when the operating state of the information processing device is determined to be abnormal,
An external monitoring device that transmits a restart signal to restart an information processing device after it has been temporarily stopped monitors the monitoring signal that is constantly sent back from the information processing device via the connection path, and detects whether the monitoring signal is no longer sent back. The configuration is such that a connection path monitoring means is provided that prohibits transmission of a restart start signal to the information processing device when the information processing device detects that the restart activation signal is transmitted to the information processing device.

[Industrial application field]

The present invention relates to an external monitoring malfunction prevention method in an external monitoring device that monitors the operating state of an information processing device.

For example, an external monitoring device is often installed in order to monitor the operating state of an information processing device such as an electronic exchange and detect abnormal conditions that cannot be detected by software, such as a runaway program.

[Conventional technology]

FIG. 3 is a diagram showing an example of a conventional external monitoring method.

In Figure 3, an electronic exchange has a redundant central processing unit (CC) 1 (one side is a 0-system central processing unit (CC) 1-0).
, the other is referred to as the 1-system central processing unit (CC) 11 (the same shall apply hereinafter), each has an external monitoring interface unit (sRD).
)2, the external monitoring section (ESE) is also duplicated.
) 3 are attached.

Note that a plurality of signal lines 41, 42, . . . are connected between the central processing unit (CC) I and the external monitoring interface unit (sRD) 2.
・It is connected by a cable 4 having .

The monitoring unit (sPv) 31 in each external monitoring unit (ESE) 3 connects to the central processing unit (
A start signal st is periodically transmitted to the call processing unit (CP) 11 in the CC) 1 to start a process similar to that of a pseudo call.

The call processing unit (CP) 11 that has received the activation signal st executes a predetermined call processing, and then sends a response signal ans indicating completion of the call processing to the monitoring unit (sPV) 3 via the same route.
Return it to 1.

If the monitoring unit (sPV) 31 receives the response signal ans within a predetermined time after transmitting the activation signal st, it determines that the operating state of the central processing unit (CC) 1 is normal, or determines that the operating state of the central processing unit (CC) 1 is normal or not. If the response signal anS is not returned, the operating state of the central processing unit (CC) 1 is determined to be abnormal, and a restart activation signal ema is output and transmitted to the AND gate 32.

The AND gate 32 connects the 0-system and 1-system monitoring units (sPV
) When the restart activation signal ema is output from 31-0 and 31-1, the restart activation signal ema is output, and the central processing It is transmitted to the restart activation unit (lower R3) 12 in the CC 1.

Resume activation unit (R3 lower) 2 that received the restart activation signal ema
2, the operation of the central processing unit (CC) 1 is temporarily stopped and then restarted.

[Problem to be solved by the invention]

As is clear from the above explanation, in conventional external monitoring systems, either the external monitoring unit (ESE) 3 or the central processing unit (CC
) 1, and a response signal an is sent back.
s is monitored, and if a response signal ans is not returned within a predetermined time, the central processing unit (CC) 1 is determined to be abnormal and a restart activation signal ema is transmitted.

Therefore, if the cable 4 is not connected properly between the central processing unit (CC) 1 and the external monitoring interface unit (sRD) 2, the central processing unit (CC) 1 may not operate normally. However, since the response signal ans was not returned, the central processing unit (CC) misidentified it as abnormal, transmitted the restart activation signal ema, and temporarily stopped the operation, causing the service of the electronic exchange to be interrupted. There was a problem that caused the .

An object of the present invention is to prevent an information processing apparatus from being restarted invalidly when the information processing apparatus and an external monitoring device are not properly connected.

[Means to solve the problem]

FIG. 1 is a diagram showing the principle of the present invention.

In FIG. 1, 100 is an information processing device to be monitored, 200 is an external monitoring device that monitors the operating state of the information processing device, and 300 is the information processing device 100 and external monitoring device 2.
00, St is an activation signal that the external monitoring device 200 periodically sends to the information processing device 100,
ans is a response signal sent back to the external monitoring device 200 when the information processing device 100 that has received the activation signal st operates normally, and ema is a response signal sent back to the external monitoring device 200 or the information processing device 100 when the operating state is determined to be abnormal. This is a restart activation signal that restarts the information processing device 100 after it has been temporarily stopped.

400 is a connection route monitoring means provided in the external monitoring device 200 according to the present invention.

[Effect]

The connection route monitoring means 400 receives information from the information processing device 100,
The monitoring signal S that is constantly returned via the connection path 300 is monitored, and when it is detected that the monitoring signal S is no longer being returned, transmission of the restart activation signal ema to the information processing device 100 is prohibited.

Therefore, if the connection path is not properly connected, the operation of the external monitoring device or information processing device is prevented from being mistakenly recognized as abnormal and an invalid restart is executed, thereby improving the reliability of the information processing device. Serviceability will improve.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 2 is a diagram illustrating an external monitoring scheme according to an embodiment of the present invention. Note that the same reference numerals indicate the same objects throughout the figures.

In FIG. 2, the information processing device 100 in FIG.
The central processing unit (CC) 1 of the electronic exchange is shown as a central processing unit (CC) 1, and the external monitoring device 200 in FIG.
) 3 is shown as a part of the connection path 300 in FIG. 1, and a cable 4 is shown as part of the connection path 300 in FIG. sRD)
2, and a NOR gate 33 and an AND gate 34 are provided in the external monitoring section (ESE) 3.

In FIG. 2, each monitoring unit (sPV) 31 provided in the external monitoring unit (ESE) 3 of both systems periodically sends the activation signal st to the central processing unit (CC), as in FIG.
The normality of the operation of the central processing unit (CC) 1 can be determined by monitoring the response signal ans transmitted to the call processing unit (CP) 11 within the central processing unit (CP) 1 and returned from the call processing unit (CP) 11 within a predetermined time. is being determined.

However, the restart activation signal e outputted from the monitoring unit (sPV) 31
Instead of being directly transmitted to AND gate 32, ma is transmitted to AND gate 34.

On the other hand, the input terminal of the driver 21 provided in the external monitoring interface unit (sRD) 2 is connected to the DC power supply 23 via the resistor 22 in the external monitoring interface unit (sRD) 2, and also connected to the DC power supply 23 in the cable 4. It is connected to the earth 13 in the central processing unit (CC) 1 via a signal line 43, and its output terminal is connected to one input terminal of the NOR gate 33 in the external monitoring unit (ESE) 3. It is connected.

The other input terminal of the NOR gate 33 is connected to the output terminal of the driver 21 of the other system.

If the cable 4 or the central processing unit (CC) 1 and the external monitoring interface unit (sRD) 2 are properly connected, the driver 21 receives only low-level signals from the central processing unit (CC) 1 through the signal line. 43, the driver 21 outputs a low level signal, and the NOR gate 3
3.

When only a low level signal is transmitted from the drivers 21 of both systems, the NOR gate 33 outputs a high level signal H and transmits it to the AND gate 34.
4 is set to a conductive state.

In such a state, the restart activation signal ema outputted by the monitoring unit (sPV) 31 that has determined that the operation of the central processing unit (CC) 1 is abnormal is transmitted to the AND gate 34 which is set to a conductive state.
The signal is transmitted to the AND gate 32 via the AND gate 32.

Therefore, as described above, when the restart activation signal ema is output from the 0-system and l-system monitoring units (sPV) 31-0 and 31-1, the AND gate 32 outputs the restart activation signal em.
a is output and transmitted to the restart activation unit (R3T) 12 in the central processing unit (CC) 1 via the external monitoring interface unit (sRD) 2 and the signal line 42 in the cable 4.

On the other hand, if the cable 4 does not properly connect the central processing unit (CC) 1 and the external monitoring interface unit (sRD) 2, the driver 21 receives a low level signal from the central processing unit (CC) 1. , is not input via the signal line 43,
Therefore, since the high level signal H is inputted from the DC power supply 23 via the resistor 22, the driver 2 outputs the high level signal H and transmits it to the NOR gate 33.

The NOR gate 33 is connected to at least one of the drivers 2
1 to a high level signal H, the AND gate 34 is set to a cutoff state in order to output a low level signal and transmit it to the AND gate 34.

In such a state, the monitoring unit (sPV) 31 or the activation signal st
Even if the response signal ans is not sent back because the cable 4 is not connected properly, the monitoring unit (sPV) 31
Even if the operation of the central processing unit (CC) 1 (7) is determined to be abnormal and the restart activation signal ema is applied, it will be blocked by the AND gate 34 and will not be transmitted to the AND gate 32.

Therefore, the AND game small 32 does not transmit the restart activation signal ema to the central processing unit (CC) 1, and the central processing unit (CC)
CC)l is prevented from being restarted.

As is clear from the above description, according to this embodiment, the external monitoring unit (ESE) 3 monitors the connection status of the cable 4, and if the cable 4 is not connected properly, the central processing unit (ESE) Even if the operating state of the CC) 1 is determined to be abnormal, the central processing unit (CC) 1 is invalidly restarted because the transmission of the restart activation signal ema to the central processing unit (CC) is prohibited. Prevented.

Note that FIG. 2 is only one embodiment of the present invention, and for example, the information processing device 100, the external monitoring device 200, and the connection path 300 are connected to the central processing unit (C) of the electronic exchange shown in the figure.
C) 1, external monitoring section (ESE) 3 and central processing section (C
C) 1 and the external monitoring interface unit (sRD) 2, and many other modifications may be considered, but the effects of the present invention remain the same in any case.

〔Effect of the invention〕

As described above, according to the present invention, when the connection path is not connected normally in the external monitoring device, the external monitoring device misidentifies the operation of the information processing device as abnormal and causes the information processing device to execute an invalid restart startup. The reliability and serviceability of the information processing device are improved.

FIG. 3 is a diagram illustrating an example of a conventional external monitoring system.

In the figure, ■ is the central processing unit (CC), 2 is the external monitoring interface unit (sRD), and 3 is the external monitoring unit (ES
E), 4 is a cable, 11 is a call processing unit (CP), 12 is a restart activation unit (R3T), 3 is an AND gate, 33 is a NOR gate, 41 to 43 are signal lines, 100 is information processing 200 is an external monitoring device, 300 is a connection path,
400 is connected

[Brief explanation of the drawing]

Figure 1 is a diagram showing the principle of the present invention, Figure 2 is a diagram showing the principle of the present invention. layer

Claims (1)

[Claims] A start signal (st) is periodically transmitted to an information processing device (100) to be monitored via a connection path (300), and the information processing device (100) receives the start signal (st). A predetermined response signal (ans) to be returned in response to the activation signal (st)
The operating state of the information processing device (100) is monitored by receiving the information, and if the operating state of the information processing device (100) is determined to be abnormal,
A restart start signal (
ema), the external monitoring device (200) transmits the connection path (30) from the information processing device (100) to the connection path (30).
0), and when it is detected that the monitoring signal (s) is no longer being sent back, the restart activation signal (100) is sent to the information processing device (100). An external monitoring malfunction prevention method characterized by providing a connection route monitoring means (400) for prohibiting transmission of ema).