JP2828017B2 - Failure rating system - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a failure evaluation system for a digital communication device, an information processing device, and the like.

[0002]

2. Description of the Related Art Conventionally, a digital communication device or information processing device composed of a plurality of packages has a parity check and a path pattern check using an empty time slot of a main signal in order to detect a failure in the device. The device has a self-monitoring function in the device for detecting a failure by using such a detection method. When a failure is detected by such a self-monitoring function in the apparatus, a failure assessment is performed to identify a failed portion, and a maintenance person is replaced with a means such as turning on a failure indicator lamp. Are required.

FIG. 3 shows an example of a conventional failure evaluation system. Here, this device includes at least two packages. One of the two packages is referred to as a self-package 50, and the upstream package for sending the main signal 63 to the self-package 50 is referred to as an upstream package 60. Each package has lamp lighting circuits 51 and 61 each having a failure display lamp for displaying the presence or absence of a failure. The own package 50 is provided with a failure detection circuit 52 for detecting a failure based on the main signal 63. The failure detection circuit 52 applies a detection method such as a parity check or a path pattern check to the main signal 63 and detects a low level (hereinafter referred to as “L”) if an abnormality is detected, and a high level (hereinafter referred to as “L”) if normal. , “H”). A failure evaluation circuit 53 that performs a failure evaluation based on the output of the failure detection circuit 52 is composed of an OR gate 54. When an error is detected in either the own package 50 or the upstream package 60, an "L" is ramped. It outputs to the lighting circuits 51 and 61 to turn on the failure indicator lamp, and outputs "H" and does not light the failure indicator lamp when the two packages are operating normally. The output of the failure evaluation circuit 53 is supplied to the upstream
Informed to 0. Reference numeral 62 denotes an auxiliary signal for notifying the own package 50 of the mounting state of the upstream package 60. By setting the mounting state of the upstream package to "L" when mounted and "H" when not mounted, the upstream package is removed. The abnormality detected inevitably in the state is masked to prohibit the lighting of the failure indicator lamp.

In this configuration, when the upstream package 60 is mounted and an abnormality is detected by the failure detection circuit 52, the output of the OR gate 54 in the failure evaluation circuit 53 becomes "L", which is the lamp lighting circuit. 51 and 61
Is entered in both. Therefore, the failure display lamps of the own package 50 and the upstream package 60 are simultaneously turned on. Here, the reason for lighting both failure indicator lamps is
This is because it cannot be determined whether the cause of the failure is on the transmitting side (upstream package) or on the receiving side (own package).

[0005]

However, in the case where it is extremely rare that an abnormality occurs in both the own package 50 and the upstream package 60 at the same time, such a failure determination system uses either the own package or the upstream package. Even if there is only one failure, the failure indicator lamps of both packages are always turned on, so that it is not possible to identify the failure location in one package. As a result, the maintenance person was confused as to which of the two packages whose failure indicator lamps were lit at the time of maintenance and which one should be replaced first. In such a case, there is a problem that the maintenance operation is wasted.

Hitherto, methods have been devised to provide a diagnostic bus dedicated to the combination of auxiliary signals or a fault evaluation in order to specify a fault location. However, in these methods, the configuration of the information processing apparatus is limited, There were problems such as the overall configuration becoming complicated.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-mentioned problems, and provides a failure evaluation system having a relatively simple structure in which a portion to be evaluated at a time is limited to one package, thereby simplifying a maintenance operation. The purpose is to improve efficiency and efficiency.

[0008]

According to the present invention, in a communication apparatus or information processing apparatus comprising a plurality of packages having a failure evaluation result display means, a main signal received from an upstream package is monitored in its own package. Failure detecting means, mounting state detecting means for detecting the mounting state of the upstream package, storing means for storing the mounting change history of the upstream package detected by the mounting state detecting means, and initializing the storing means at power-on An initialization circuit for performing the initialization, a failure evaluation circuit for identifying a failed package, and a notification unit for notifying the upstream package of a result evaluated by the failure evaluation circuit are provided. Here, the failure evaluation circuit refers to the failure detection result by the failure detection unit, the mounting state of the upstream package, and the mounting change history of the upstream package stored in the storage unit, and determines whether the upstream package or the own package has failed. It is to evaluate whether it is.

At this time, in the initial state after power-on, if a failure is detected while the upstream package is mounted, the failure evaluation circuit evaluates that only the upstream package has failed. . Then, this is notified to the upstream package by the notification means and displayed on the failure evaluation result display means of the upstream package, but is not displayed on the failure evaluation result display means of the own package, so that only the upstream package is notified to the maintenance person. Notify that it will be replaced. Also, the storage means initialized when the power is turned on is
When the upstream package is exchanged, the mounting change history of the upstream package is stored and retained, so that the state in which the upstream package has been removed is detected as a failure and displayed as failure on the failure evaluation result display means of the own package. It also plays a role in preventing things.

Further, if a failure is still detected by the failure detecting means even after the replacement of the upstream package, the failure evaluation circuit determines the mounting state of the upstream package and the mounting state of the upstream package stored in the storage means. With reference to the change history and the failure detection result by the failure detection means,
Assess that your package is out of order. And
While this is displayed using the failure evaluation result display means of the own package, the replaced upstream package is regarded as not having a failure, and is not displayed on the failure evaluation result display means of the upstream package. Inform that only your own package needs replacement.

The same function can be achieved by the following configuration. That is, in a communication device or an information processing device including a plurality of packages having a failure evaluation result display unit, a first mounting state detecting unit that detects a mounting state of a downstream self-package in an upstream package, Storage means for storing a mounting change history of the own package detected by the first mounting state detecting means;
Provide an initialization circuit that initializes the storage circuit when the power is turned on,
And a failure detection circuit for detecting a failure based on a main signal received from the upstream package in the own package, a second mounting state detection means for detecting a mounting state of the upstream package, and a failure evaluation for specifying the failed package A circuit and a notifying means for notifying the result of the failure evaluation circuit to the upstream package are provided. Here, the fault evaluation circuit in the own package is
By referring to the failure detection result by the failure detecting means, the mounting state of the upstream package detected by the second mounting state detecting means, and the mounting change history of the own package stored in the storage means in the upstream package, the upstream package and the It evaluates which of the packages is out of order.

At this time, in the initial state after the power is turned on, if a failure is detected in a state where the upstream package is mounted, the failure evaluation circuit determines that only the own package is defective. And Then, this is displayed using the failure evaluation result display means of the own package, but is not displayed on the failure evaluation result display means of the upstream package, but the maintenance person is notified that only the own package needs replacement.

Further, if the failure is still detected by the failure detection means even after the replacement of the own package, the failure evaluation circuit determines the failure detection result by the failure detection means, the mounting state of the upstream package, and the self package stored in the storage means. It is determined that the upstream package has failed by referring to the mounting change history of. Then, this is notified to the upstream package by the notification means and displayed on the failure evaluation result display means of the upstream package, while the own package is regarded as not malfunctioning, and the failure evaluation result display means of the own package is considered. To notify the maintenance person that the upstream package is to be replaced.

Here, the storage means in the upstream package is:
After being initialized at power-on, by storing and maintaining the mounting change history of the own package, the state where the own package was removed when replacing the own package is detected as a failure, and the failure evaluation result of the upstream package It plays the role of preventing the display means from being displayed as a failure.

In the above two configurations, the storage means may use a one-bit storage circuit such as a flip-flop circuit.

Further, the failure detection result by the failure detection means, the mounting state of the upstream package, and the mounting change history of the own package stored in the storage means are represented by two values of "H" and "L", so that a failure determination circuit is provided. Can be configured using a logic circuit.

[0017]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail with reference to the drawings. FIG. 1 is a circuit diagram showing the configuration of the failure determination system according to the first embodiment of the present invention.
Here, one of the plurality of packages constituting the communication device or the information processing device is defined as the own package 10, and the upstream package that sends the main signal 24 to the own package 10 is defined as the upstream package 20. These packages have lamp lighting circuits 11 and 21 each having a failure indicating lamp.

An auxiliary line is provided between these two packages as mounting state detecting means for detecting the mounting state of the upstream package 20, and the mounting state of the upstream package 20 is changed by an auxiliary signal 23 flowing over the auxiliary line. The information is transmitted to the own package 10. However, the auxiliary signal 23
Indicates the mounted state of the upstream package 20 by “L” and the unmounted state by “H”.

The self-package 10 has a failure detection circuit 12 for detecting a package failure from the main signal 24, a D flip-flop circuit 15 for storing the mounting change history of the upstream package 20, and the D flip-flop circuit 15 when the power is turned on. A power-on set circuit 14 for initialization, and
A failure evaluation circuit 13 is provided for identifying one package that should have failed.

Here, the failure detection circuit 12 outputs "L" if a failure is detected as a result of performing a parity check, a path pattern check, and the like, and outputs "H" otherwise. The D terminal of the D flip-flop circuit 15 is always grounded and always at "L", and its clock terminal C receives an auxiliary signal 23 for transmitting the mounting state of the upstream package 20 to its own package. As a result, the D flip-flop circuit 15 is initialized when the power is turned on by the power-on set circuit 14 connected to the set terminal S, and then stores the mounting change history of the upstream package 1.
It operates as bit storage means.

On the other hand, the failure evaluation circuit 13
6, 17, 18 and an inverter 19, the output of the failure detection circuit 12 and the D flip-flop 15
The failed package is identified as either the own package 10 or the upstream package 20 on the basis of the Q output of the above and the auxiliary signal 23 indicating the mounting state of the upstream package 20. Then, in order to display the evaluation result of the failure evaluation circuit 13, the output of the OR gate 18 is sent to the lamp lighting circuit 11 of the own package 10, and the auxiliary signal 22, which is the output of the OR gate 17, is sent to the lamp lighting circuit of the upstream package 20. 21
Respectively. Note that the auxiliary signal 22 serves as a notification unit that notifies the upstream package 20 of the evaluation result of the failure evaluation circuit 13.

In this configuration, if the upstream package 20 is mounted in an initial state after power is turned on, the Q output of the D flip-flop circuit 15 is "H" and the auxiliary signal 23 is
Is "L". In this state, if there is no abnormality in the main signal 24, the output of the failure detection circuit 12 is "H". Therefore, the failure evaluation circuit 13 evaluates that both the own package 10 and the upstream package 20 are normal and outputs “H” to both the lamp lighting circuits 11 and 21, so that none of the failure display lamps is lit.

However, if any failure is detected in the failure detection circuit 12, the failure evaluation circuit 13 first evaluates that the upstream package 20 has failed, as described below. That is, when the failure detection circuit 12 detects a failure from the main signal 24, the output of the failure detection circuit 12 becomes “L”. On the other hand, Q of the D flip-flop circuit 15
Since the output remains at "H" and the auxiliary signal 23 remains at "L", the OR gate 18 of the failure evaluation circuit 13 holds "H", but the outputs of the OR gates 16 and 17 become "L".
As a result, the failure indicator lamp of the own package does not light up, but the "L" output of the OR gate 17 is input to the lamp lighting circuit 21 of the upstream package 20 via the auxiliary signal 22, and the failure indicator lamp of the upstream package 20 Lights up. Therefore, the maintainer looks at this and sees the upstream package 2
0 is exchanged before the own package 10.

When the upstream package 20 is replaced, the auxiliary signal 23 connected to the clock input C of the flip-flop 15 changes from "L" due to a change in the mounting of the upstream package (from mounting to unmounting and mounting again). It changes to "H" and again to "L". As a result, the Q output of the flip-flop 15 changes from “H” to “L”. Further, if the cause of the failure is eliminated by replacing the upstream package, the output of the failure detection circuit 12 becomes "H" and the outputs of the OR gates 16, 17, and 18 also become "H". The indicator lamp does not light.

However, if a failure is still detected in the failure detection circuit 12 even after the replacement of the upstream package, the failure evaluation circuit 13 sets the outputs of the OR gates 16 and 18 to "L", and , While the output of the OR gate 17 is "H".
Therefore, the failure indicator lamp of the upstream package 20 is not turned on. In this way, if the failure is not resolved even after the upstream package replacement, the failure evaluation circuit 13 evaluates only the own package 10 as a failure, turns on only the failure indicator lamp of the own package 10, and notifies the maintenance person of the own package 10
Prompt for replacement.

Next, FIG. 2 shows a circuit configuration of a failure determination system according to a second embodiment of the present invention. Here again, one of the plurality of packages constituting the communication device or the information processing device is the own package 30, and the package that sends the main signal 46 to the own package is the upstream package 40, and these packages have a failure indicator lamp. It has lamp lighting circuits 31 and 41.

Between these two packages, one auxiliary line is provided as mounting state detecting means for detecting the mounting state of the self-package 30 and the upstream package 40, and the auxiliary signal 38 and the auxiliary signal 38 flowing thereover are provided. The mounting state of the own package 30 and the upstream package 40 is transmitted to each other by 44. However, the auxiliary signals 38, 44
Indicates the mounted state by “L” and the unmounted state by “H”.

With this configuration, the own package 30 performs a parity check and a path pattern check on the main signal 46,
A failure detection circuit 32 that outputs “H” when normal and outputs “L” when a failure is detected, and a failure evaluation circuit 33 that specifies one package that is to have failed is provided.

On the other hand, the upstream package 40 includes a D flip-flop circuit 43 for storing the mounting change history of the package 30 itself, and the flip-flop circuit 43 when the power is turned on.
And a power-on reset circuit 42 for resetting
The D terminal of this D flip-flop circuit 43 is always "H".
The clock terminal C receives an auxiliary signal 38 indicating the mounting state of the package 30 itself. Thereby, the D flip-flop circuit 43
After being reset by the power-on reset circuit 42 at the time of power-on, it functions as a 1-bit storage means for storing the mounting change history of the package 30 itself.

The failure evaluation circuit 33 includes OR gates 34, 3
5 and 36, and an inverter 37. The output of the failure detection circuit 32, the auxiliary signal 44 indicating the mounting state of the upstream package 40, and the Q output of the D flip-flop circuit 43 storing the mounting change history of the own package 30. Is identified as one of the own package 30 and the upstream package 40 based on the auxiliary signal 45 for notifying the failure. Then, in order to display the evaluation result of the failure evaluation circuit 33, the output of the OR gate 36 is sent to the lamp lighting circuit 31 of the own package 30, and the auxiliary signal 39, which is the output of the OR gate 35, is sent to the lamp lighting circuit of the upstream package 40. 41, respectively. The auxiliary signal 39 plays a role as a notifying means for notifying the upstream package 40 of the evaluation result of the failure evaluation circuit 33.

In this configuration, when both the own package 30 and the upstream package 40 are mounted in the initial state after power-on, the auxiliary signal 45 indicating the Q output of the D flip-flop circuit 43 is "L", and The auxiliary signals 38 and 44 indicating the mounting state are also "L". In this state, if there is no abnormality in the main signal 46, the output of the failure detection circuit 32 is "H".
Evaluates that both the own package 30 and the upstream package 40 are normal and outputs "H" to both the lamp lighting circuits 31 and 41, so that none of the failure indicating lamps are lit.

However, if any failure is detected in the failure detection circuit 32 in this state, the failure evaluation circuit 33 in this embodiment first evaluates that the own package 30 has failed, as described below. That is, when the failure detection circuit 32 detects a failure from the main signal 46, the output of the failure detection circuit 32 becomes “L”. On the other hand, since the auxiliary signals 44 and 45 are "L", the OR gates 34 and 36 of the failure evaluation circuit 33 output "L", while the OR gate 35 holds "H" due to the presence of the inverter 37. . As a result, while the failure indicator lamp of the own package 30 is turned on, the OR signal is
Upstream package 4 to which the output “H” of gate 35 is notified
The fault indicator lamp of 0 does not light. This allows the maintenance person to replace the own package prior to the upstream package.

When the own package 30 is replaced, the auxiliary signal 38 indicating a change in mounting of the own package (from mounting to non-mounting and mounting again) changes from “L” to “H” and then to “L” again. As a result, the auxiliary signal 45 for transmitting the Q output of the flip-flop circuit 43 having this as a clock input to the own package 30 changes from “L” to “H”.
If the cause of the failure is eliminated by replacing the own package 30, the output of the failure detection circuit 32 becomes "H".
Accordingly, the outputs of the OR gate circuits 34, 35, and 36 also become "H", and none of the failure display lamps is turned on.

However, if a failure is still detected in the failure detection circuit 32 even after the replacement of the own package, the output of the failure detection circuit 32 and the auxiliary signal 44 indicating the mounting state of the upstream package 40 become "L". . Therefore, the output of the OR gate 36 of the fault evaluation circuit 33 holds “H” due to the auxiliary signal 45, but the OR gate 34,
The output of 35 becomes "L". The “L” output of the OR gate 35 is connected to the lamp lighting circuit 41 of the upstream package 40.
Of the upstream package 40 is turned on. In this way, the failure evaluation circuit 33 evaluates only the upstream package as a failure and urges the maintenance person to replace this package.

It should be noted that which of the failure evaluation systems of the first and second embodiments should be used depends on the failure rate of components used, the complexity of the circuit, and the like at the time of system design. It should be determined by evaluating which of the (upstream package) and the receiving side (own package) is more likely to fail. That is, the failure evaluation system of the first embodiment is suitable when the possibility of failure on the transmission side (upstream package) is higher, and the failure evaluation system on the reception side (own package) is higher when the failure rate on the reception side (own package) is high. The failure assessment system of the second embodiment is suitable.

[0036]

As described above, the failure evaluation system of the present invention is provided with storage means for storing the mounting change history of the upstream or downstream package in the package, and takes the package mounting change history into consideration for the failure evaluation. By doing
When a failure is detected in a communication device or an information processing device including a plurality of packages, the display of the failure location is specified for one package. This makes it easy for the maintenance person to determine which package should be replaced when recovering the entire apparatus, thereby simplifying the maintenance operation.

Also, when designing the system, the possibility of failure on the transmitting side (upstream package) and the receiving side (own package) is compared and taken into consideration, and an appropriate one of the failure evaluation systems of claim 1 and claim 2 is considered. By selecting, it is also possible to reduce unnecessary maintenance operations in which a normal package is replaced first, thereby simplifying the maintenance operations and improving efficiency.

According to the present invention, the storage means for storing the mounting change history of the package can be realized as a 1-bit storage circuit using a flip-flop circuit, and the failure evaluation circuit also uses a logic circuit. It is possible to configure. Therefore, there is no need to provide a dedicated bus or a failure evaluation device for the failure evaluation, and it is possible to provide a communication device or information processing device failure evaluation system including a plurality of packages with a relatively simple configuration. Become.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing a configuration of a failure determination system according to a first embodiment.

FIG. 2 is a circuit diagram illustrating a configuration of a failure determination system according to a second embodiment.

FIG. 3 is a circuit diagram illustrating an example of a conventional failure determination system.

[Explanation of symbols]

10: own package, 20: upstream package, 11, 2
DESCRIPTION OF SYMBOLS 1 ... Lamp lighting circuit provided with fault display lamp, 12 ... Fault detection circuit, 13 ... Fault evaluation circuit, 14 ... Power on set circuit, 15 ... D flip-flop circuit, 16, 1
7, 18: OR gate, 19: Inverter, 22, 23
... auxiliary signal, 24 ... main signal, 30 ... own package, 40
... Upstream package, 31, 41 ... Lamp lighting circuit with failure indication lamp, 32 ... Fault detection circuit, 33 ... Fault evaluation circuit, 42 ... Power-on reset circuit, 43 ... D flip-flop circuit, 34,35,36 ... OR gate, 3
7 ... inverter, 38, 39, 44, 45 ... auxiliary signal,
46 ... Main signal

Claims (6)

(57) [Claims] 1. A communication device or an information processing device comprising a plurality of packages each having a display means for displaying a failure evaluation result, wherein the own package includes a failure detection circuit for detecting a failure based on a main signal received from an upstream package. Mounting state detecting means for detecting a mounting state of the upstream package; storage means for storing a mounting change history of the upstream package detected by the mounting state detecting means; and initializing the storage means at power-on. Conversion circuit, based on the detection result of the failure detection circuit, the mounting state of the upstream package detected by the mounting state detecting means, and the mounting change history of the upstream package stored in the storage means, A fault assessment circuit that identifies either the upstream package or the own package; Notifying means for notifying the result of the failure evaluation circuit to the upstream package, wherein the failure evaluation circuit displays the self-package as a failure when the own package is evaluated as a failure, and indicates that the upstream package is a failure. When the rating is made, this is displayed on the upstream package via the notifying means, and a failure rating system is provided. 2. A communication device or an information processing device comprising a plurality of packages each having a display means for displaying a failure evaluation result, wherein the upstream package detects the mounting state of its own package downstream. Storage means for storing a mounting change history of the own package detected by the first mounting state detecting means; and an initialization circuit for initializing the storage means at power-on. A failure detection circuit that detects a failure based on a main signal received from the upstream package; a second mounting state detection unit that detects a mounting state of the upstream package; a detection result of the failure detection circuit; Based on the mounting status of the upstream package detected by the mounting status detecting means and the mounting change history of the own package stored in the storage means. A failure evaluation circuit that specifies a failed package as either the upstream package or the own package, and a notification unit that notifies a result of the failure evaluation circuit to the upstream package, wherein the failure evaluation circuit includes: When the self-package is rated as faulty, this is displayed on the self-package, and when the upstream package is rated as faulty, this is displayed on the upstream package via the notification means. system. 3. The fault evaluation system according to claim 1, wherein the fault evaluation circuit is configured to detect the fault in a state where the upstream package is mounted in an initial state after power-on. A failure rating system that determines that only its own package has failed, and if a failure is still detected after the upstream package replacement, the own package is rated as failed. 4. The failure evaluation system according to claim 2, wherein the failure evaluation circuit is configured to, in an initial state after power-on, when a failure is detected in a state where the upstream package is mounted, the own package. A failure rating system that determines that only the upstream package has failed and, if a failure is still detected after the replacement of the own package, determines that the upstream package has failed. 5. The fault evaluation system according to claim 1, wherein said storage means is a 1-bit storage circuit. 6. The fault evaluation system according to claim 1, wherein the fault evaluation circuit is configured by a logic circuit.