JP5598971B2 - Alarm control device - Google Patents

Description

  The present invention relates to an alarm control technique for masking alarms as necessary in a transmission apparatus or the like in which many types of alarms may occur when a failure occurs.

  In a transmission device, etc., the status of each part (various LSIs, various ports, etc.) in the device is monitored so that the failure can be quickly recovered. A kind of alarm is generated. This alarm is reported to an external system such as a maintenance management device, and the administrator of the maintenance management device estimates the failure occurrence part based on the type of alarm and takes measures necessary for failure recovery.

  By the way, in a device such as a transmission device in which each unit in the device operates in a related manner, if a failure occurs in a certain part of the device, a failure occurs in many parts of the device linked to the failure. As a result, many alarms may occur almost simultaneously. In such a situation, there is a high risk that an administrator will miss an alarm with a high priority, and there is a high risk that a situation will occur in which an appropriate measure for recovery from a failure cannot be taken.

  On the other hand, there is also a technology that presents to the administrator only alarms that have a priority higher than the threshold specified by the administrator, and masks the alarms that are less than the above priority, from among multiple alarms. It is known (see, for example, Patent Document 1). According to this technology, even when many alarms are generated almost simultaneously due to a chain fault, the alarms presented to the administrator can be narrowed down to alarms having a priority higher than the priority specified by the administrator. This can reduce the risk that an administrator will miss a high priority alarm.

JP-A-2-297698

  However, the technique described in Patent Document 1 has a problem in that the administrator himself / herself has to designate a priority level as a threshold value in order to narrow down alarms to be presented to the administrator, and this places a burden on the administrator. is there. In addition, since the priority is specified by the administrator, an appropriate priority may not be specified. In such a case, no alarm is presented to the administrator, or conversely, the administrator Many alarms may be presented.

[Object of the invention]
SUMMARY OF THE INVENTION An object of the present invention is to provide an alarm control apparatus that solves the problem that an administrator has to designate a priority when narrowing down alarms to be presented to the administrator based on the priority. .

A first alarm control device according to the present invention includes:
For each of a plurality of alarms, a detection unit that detects that the state has changed,
When a first alarm whose state has changed from non-occurrence to occurrence is detected in the detection unit, if an alarm having a higher priority than the first alarm is occurring, the detected first alarm is detected. And a mask processing unit that masks the alarm so that the state does not occur.

A mask control method according to the present invention includes:
An alarm control method executed by a computer including a detection unit and a mask processing unit,
The detection unit detects that the state of each of the plurality of alarms has changed,
When an alarm having a higher priority than the first alarm is occurring when the mask processing unit detects a first alarm whose state has changed from non-occurring to occurring in the detecting unit, The detected first alarm is masked and the state is not generated.

The program according to the present invention is:
A program for causing a computer to function as an alarm control device,
The computer,
For each of a plurality of alarms, a detection unit that detects that the state has changed,
When a first alarm whose state has changed from non-occurrence to occurrence is detected in the detection unit, if an alarm having a higher priority than the first alarm is occurring, the detected first alarm is detected. It functions as a mask processing unit that masks an alarm and makes its state non-occurring.

  According to the present invention, when the alarms to be presented to the administrator are narrowed down based on the priority, the alarm having a relatively high priority is presented among the generated alarms without placing a burden on the administrator. It becomes possible.

It is a block diagram which shows the structural example of the 1st Embodiment of this invention. It is a block diagram which shows the structural example of the interrupt detection part D101. It is a figure which shows an example of a matrix table | surface, a mask factor list | wrist, and a masked factor list | wrist. It is a figure which shows the example of the content of the alarm state memory | storage part D107. It is a figure for demonstrating the alarm chain during Delay and the alarm chain during Stretch. It is the flowchart which showed the outline | summary of the process of an alarm control apparatus. It is a flowchart which shows the outline | summary of the mask process which the mask process part D102 performs. It is a flowchart which shows the process example of the on-occurrence mask process which the mask process part D102 performs. It is a flowchart which shows the process example of the to-be-masked process at the time of occurrence which the mask process part D102 performs. It is a flowchart which shows an example of the masking process at the time of a recovery | restoration which the mask process part D102 performs. It is a flowchart which shows an example of the Delay / Stretch process which Delay / Stretch process part D103 performs. It is a flowchart which shows an example of the timer expiration process which Delay / Stretch process part D103 performs.

[First embodiment of the present invention]
Referring to FIG. 1, a first embodiment of an access control apparatus according to the present invention includes an interrupt detection unit D101, a mask processing unit D102, a front / rear protection processing unit (Delay / Stretch processing unit) D103, And a storage device D104 such as a disk device.

  The storage device D104 includes a matrix table storage unit D105, a list storage unit D106, an alarm state storage unit D107, and a chain storage unit D108.

  A matrix table indicating the mask relationship between alarms is recorded in the matrix table storage unit D105. In the list storage unit D106, the mask factor list and the masked factor list generated by the mask processing unit D102 are recorded. The alarm state storage unit D107 records the state of each alarm (occurrence or non-occurrence) before mask processing is performed by the mask processing unit D102 and the state of each alarm after mask processing is performed. In the chain storage unit D108, the delay / stretch processing unit D103 records the alarm chain during delay and the alarm chain during stretch.

  The interrupt control unit D101 detects an alarm in which a state change has occurred, and outputs an alarm change notification including identification information for uniquely identifying the alarm and the changed alarm state to the mask processing unit D102.

  Referring to FIG. 2, the interrupt detection unit D101 includes an interrupt generation unit D201 realized by hardware, an interrupt notification unit D202 realized by software, and a CPU (Central Processing Unit).

  The interrupt generation unit D201 realized by hardware includes an FPGA (Field Programmable Gate Array) and an LSI (Large Scale Integration). The LSI includes a 4-bit alarm register R1 and a change detection register R2, and the FPGA includes a 4-bit change detection register R3.

  Each bit of the alarm register R1 in the LSI corresponds to a different alarm (failure) and indicates whether or not a corresponding alarm has occurred. In the present embodiment, “1” indicates a state where an alarm is generated, and “0” indicates a state where an alarm is not generated. The first to fourth bits of the change detection register R2 correspond to the first to fourth bits of the alarm register R1, respectively, and indicate whether or not the corresponding bits have changed.

  Each bit of the change detection register R3 in the FPGA corresponds to a different LSI, and indicates whether or not the contents of the alarm register R1 in the corresponding LSI have changed. In FIG. 2, only the LSI corresponding to the second bit of the change detection register R3 is shown, but there are LSIs corresponding to the respective bits of the change detection register R3. That is, one change detection register R3 in the FPGA aggregates the states of the change detection registers R2 in the plurality of LSIs. By doing so, the number of interrupt lines to the CPU can be reduced as compared with the case where each LSI directly interrupts the CPU.

  The CPU located between the interrupt generation unit D201 and the interrupt notification unit D202 includes a 4-bit configuration change detection register R4. Each bit of the change detection register R4 corresponds to a different FPGA. When any of the 4 bits of the change detection register R3 in the corresponding FPGA has a value indicating that there is a change (in this embodiment, “1”), the corresponding bit is a value indicating that there is a change ( “1”). Further, when any bit of the change register R4 becomes “1”, the CPU notifies the interrupt notification unit D202 of interrupt detection.

  On the other hand, the interrupt notification unit D202 realized by software includes an interrupt handler and an interrupt processing task.

  When an interrupt is detected by the CPU, the interrupt handler notifies the interrupt processing task of an interrupt.

  The interrupt processing task recognizes an alarm whose state has changed based on the contents of the state change registers R2 to R4 and the alarm register R1, and identifies information indicating the alarm (alarm identification information) and information indicating the alarm state after the change. An alarm change notification including (alarm state information) is output to the mask processing unit D102.

  More specifically, when receiving an interrupt notification from the interrupt handler, the interrupt processing task first refers to the change detection register R4 in the CPU and checks to which bit “1” is set. Next, the change detection register R3 in the FPGA corresponding to the bit for which “1” is set (the bit of the change detection register R4) is referred to, and it is checked at which bit “1” is set. Thereafter, the change detection register R2 in the LSI corresponding to the bit for which “1” is set (the bit of the change detection register R3) is referred to, and it is checked which bit “1” is set. Further, among the bits of the alarm register R1, the value of the bit corresponding to “1” in the change detection register R2 is obtained.

  When the obtained value is “1”, an alarm change notification including alarm state information indicating the alarm occurrence state and alarm identification information is output to the mask processing unit D102. On the other hand, when the obtained value is “0”, an alarm change notification including alarm state information indicating the alarm recovery state and alarm identification information is output to the alarm processing unit D102. Thereafter, the interrupt processing task clears each of the change detection registers R2 to R4 referred to above. As the alarm type information, for example, a combination of register information indicating an alarm register whose contents have changed and bit position information indicating what bit of the alarm register has changed can be used. In the present embodiment, the interrupt detection processing unit D101 is realized by hardware, but this part is replaced with periodic change detection processing by software, and only the alarm that has changed is notified to the mask processing unit D102. Thus, the function can be realized without depending on the hardware.

  When the alarm change notification is passed from the interrupt detection unit D101, the mask processing unit D102 is recorded in the matrix table indicating the mask relationship between alarms and recorded in the list storage unit D106. Mask processing is performed using the mask factor list and masked factor list, and the actual alarm state and the alarm state after masking recorded in the alarm state storage unit D107.

  Referring to FIG. 3A, an example of a matrix table D301 recorded in the matrix table storage unit D105 is shown. In the figure, A1 to A4 indicate alarm identification information. In the following description, alarms having alarm identification information A1 to A4 may be referred to as alarms A1 to A4. The priority of alarms A1 to A4 is the highest for alarm A1, the second highest for alarms A2 and A3, and the lowest for alarm A4. Alarm identification information that becomes a mask factor is set in the row of the matrix table shown in FIG. 9A, and alarm identification information that becomes a masked factor is set in a column. Then, whether or not the mask factor set for the row and the masked factor set for the column are related by whether or not “×” is set for the element at the intersection of the row and the column. ing. For example, for mask factor “Alarm A1,” “X” is set at the intersection with masked factors “Alarm A2, A3, A4”, indicating that alarm A1 masks alarms A2 to A4. Yes. Further, for example, for the masked factor “alarm A3”, “x” is described at the intersection with the mask factor “alarm A1”, which indicates that the alarm A3 is masked by the alarm A1.

  3B and 3C, a mask factor list D302 and a masked factor list D303 for the alarm A2 created by the mask processing unit D102 based on the matrix table D301 are shown. The mask factor list D302 records the identification information of the alarm A1 that masks the alarm A2, and the masked factor list D303 records the identifier of the alarm A4 that is masked by the alarm A2.

  Referring to FIG. 4, an example of the alarm state storage unit D107 is shown. Referring to the figure, the alarm state storage unit D107 records the alarm state of each of the alarms A1 to A4 and the alarm state after mask processing (the alarm state after masking). The alarm state and the alarm state after masking take two states of “occurring” and “not occurring”. In the initial state, all alarm states and post-mask alarm states are “not generated”.

  When the alarm change notification from the interrupt detection unit D101 notifies the occurrence of an alarm, the mask processing unit D102 creates a mask factor list and a masked factor list for the generated alarm and records them in the list storage unit D106 . Alarm identification information for masking an alarm whose state has changed is set in the mask factor list, and alarm identification information masked by an alarm whose state has changed is set in the masked factor list. If an alarm whose identification information is set in the mask factor list is occurring (if the corresponding alarm status recorded in the alarm status storage unit D107 is “occurring”), an alarm change notification is generated. Masks the notified alarm, and if it is not occurring, does not mask it. Specifically, if an alarm whose identification information is set in the mask factor list is being generated, the alarm status after masking for the corresponding alarm recorded in the alarm status storage unit D107 is set to “Not generated” If not, the alarm state after masking is set to “occurring”. Further, it is checked whether there is an alarm that is occurring among alarms having a priority higher than that of the alarm that has occurred. If there is no such alarm, the identification information is displayed in the masked factor list. If there is an alarm whose alarm status is “occurring” recorded in the alarm status storage unit D107 among the alarms set to, after masking the above alarm recorded in the alarm status storage unit D107 The alarm state is set to “Not generated”. The priority of each alarm can be obtained by, for example, recording a priority table in which the priority of each alarm is recorded in the storage device D104 and referring to this priority table.

  On the other hand, if the alarm change notification notifies the alarm recovery, a masked factor list for the recovered alarm is created and recorded in the list storage unit D106. Thereafter, it is checked whether an alarm that is occurring exists among alarms having a priority higher than that of the restored alarm. And if there is no such alarm, if there is an alarm whose alarm status is “occurring” in the alarm whose identification information is set in the masked factor list, the post-mask alarm status for that alarm Set to “occurring”.

  Further, the mask processing unit D102 passes the identification information of the alarm whose alarm state has changed after masking to the Delay / Stretch processing unit D103.

  The delay / stretch processing unit D103 performs a delay process or a stretch process using the post-mask alarm state for the alarm whose identifier is passed from the mask processing unit D102.

  More specifically, the delay / stretch processing unit D103 performs the delay process and the stretch process by using the delay alarm chain D501 and the stretch alarm chain D502 shown in FIGS. 5 (a) and 5 (b).

  In the delay alarm chain D501, the expiration time and identification information (alarm identification information) of the alarm that has changed while the post-mask alarm state is occurring are connected in order from the earliest expiration time. In the in-stretch alarm chain D502, the expiration time and the identification information (alarm identification information) of the alarm whose alarm state has changed to non-occurrence after being masked are connected in the order from the earliest expiration time.

  When the alarm identifier is passed from the mask processing unit D102, the delay / stretch processing unit D103 determines whether the alarm state after masking of the alarm specified by this identifier has changed during the occurrence or has not occurred. To do. This determination is performed with reference to the alarm state storage unit D107.

  When it is determined that the alarm has changed during the occurrence, the expiration time and the identification information for the alarm are connected to the delay alarm chain D501. The expiration time is a time obtained by adding a predetermined time to the current time. Further, when the expiration time and identification information about the alarm are connected to the head of the alarm chain D501 during delay, the firing time of the delay timer (not shown) is changed to the above expiration time. Then, when the Delay timer is fired, the expiration time is checked in order from the head of the Delay alarm chain D501, and for the alarm that has reached the expiration time, the occurrence of the alarm is reported to the external system.

  On the other hand, if it is determined that the alarm has not occurred, the expiration time and identification information for the alarm are connected to the in-stretching alarm chain D502. The expiration time is a time obtained by adding a predetermined time of the current time as in the case of connecting to the alarm chain during delay. When the expiration time and identification information about the alarm are connected to the head of the alarm chain D502 during the stretch, the firing time of the stretch timer (not shown) is changed to the expiration time. Then, when the Stretch timer fires, the end time is checked in order from the beginning of the Stretch alarm chain D502, and the alarm recovery report is sent to the external system for alarms that have reached the expiration time.

  The interrupt notification unit D202, the mask processing unit D102, and the delay / stretch processing unit D103 can be realized by a computer, and when realized by a computer, for example, as follows. A disk, a semiconductor memory, and other recording media recording programs for causing the computer to function as the interrupt notification unit D202, the mask processing unit D102, and the delay / stretch processing unit D103 are prepared, and the computer reads the program. The computer controls its own operation according to the read program, thereby realizing an interrupt notification unit D202, a mask processing unit D102, and a Delay / Stretch processing unit D103 on the computer.

  Next, the operation of the present embodiment will be described in detail with reference to the drawings.

  Referring to FIG. 6, in the present embodiment, first, alarm detection processing by interrupt detection unit D101 is executed (step C101), then mask processing by mask processing unit D102 is executed (step C102), and finally Then, the Delay / Stretch processing by the Delay / Stretch processing unit D103 is executed (Step C103).

  In the alarm detection process in step C101, the interrupt detection unit D101 having the configuration shown in FIG. 2 detects an alarm in which a state change has occurred, and includes identification information for uniquely identifying the alarm and an alarm state after the change. An alarm change notification is output to the mask processing unit D102. Here, instead of allocating all interrupts directly to the CPU, as shown in Fig. 2, by consolidating multiple interrupt factors into a bitmap format in the FPGA, the number of interrupt wires to the CPU is reduced. In addition, a plurality of interrupt factors can be processed together by software.

  In the mask process of step C102, the mask processing unit D102 executes the processes shown in the flowcharts of FIGS.

  Referring to FIG. 7, when an alarm change notification including alarm identification information and an alarm state is passed from the interrupt detection unit D101, the mask processing unit D102 determines whether the alarm state is “occurring” or “not yet”. It is determined whether it is “occurrence” (step C201).

  When “occurring” is set (YES in step C201), the occurrence mask process and the occurrence masked process are sequentially executed (steps C202 and C203). On the other hand, if “not generated” (step C201: NO), the recovery masked process is executed (step C204).

  In the occurrence mask process in step C202, the process shown in the flowchart of FIG. 8 is executed.

  Referring to FIG. 8, first, the mask processing unit D102 may describe an alarm specified by the identification information in the alarm change notification based on the matrix table recorded in the matrix table storage unit D105 (sometimes referred to as a target alarm). ) Is created, and the created mask factor list is recorded in the list storage unit D106 (step C301). Now, for example, if the matrix table recorded in the matrix table storage unit D105 is as shown in FIG. 3 (a) and the target alarm indicates the alarm A2, it is shown as a mask factor list for the alarm A2. A mask factor list D302 shown in 3 (b) is created.

  Next, the mask processing unit D102 checks whether there is an alarm whose status is “occurring” recorded in the alarm status storage unit D107 among the alarms whose identifiers are set in the mask factor list. (Steps C302, C303).

  If such an alarm exists (YES in step C303), the post-mask alarm state for the target alarm recorded in the alarm state storage unit D107 is set to “not generated” (step C305). That is, when an alarm having a higher priority than the target alarm has occurred, the target alarm is masked. By this occurrence mask process, it becomes possible to present an alarm with a high occurrence priority and high priority to the administrator with priority.

  On the other hand, if there is no such alarm (YES in step C302), the alarm status after masking for the target alarm recorded in the alarm state storage unit D107 is set to “occurring” and the target alarm Is sent to the Delay / Stretch processing unit D103 (step C304).

  In the masking process at the time of occurrence in step C203, the process shown in the flowchart of FIG. 9 is performed.

  Referring to FIG. 9, mask processing unit D102 first creates a masked factor list for the target alarm and records it in list storage unit D106 (step C401). Now, for example, if the matrix table is shown in FIG. 3A and the target alarm is alarm A2, the masked factor list D303 shown in FIG. 3C is created as the masked factor list for alarm A2. Will be.

  Next, the mask processing unit D102 determines whether there is an alarm whose alarm status is “occurring” recorded in the alarm status storage unit D107 among the alarms whose priority is higher than the priority of the target alarm. Whether or not is checked (step C402).

  If such an alarm exists (YES in step C402), the masked process at the time of occurrence ends.

  On the other hand, when such an alarm does not exist (step C402 is NO), the alarm state recorded in the alarm state storage unit D107 for each alarm for which alarm identification information is set in the masked factor list It is checked whether or not is “occurring” (steps C403 and C404). For alarms whose alarm status is “occurring” (for alarms for which step C404 is YES), the alarm status after masking that alarm is recorded in the alarm status storage unit D107 is “not generated” And the alarm identification information of the alarm is passed to the Delay / Stretch processing unit D103 (step C405). When the above-described processing is performed for all alarms for which alarm identification information is set in the masked factor list (YES in step C403), the mask processing unit D102 ends the masked processing at the time of occurrence.

  In the recovery masked process in step C204, the process shown in the flowchart of FIG. 10 is performed.

  Referring to FIG. 10, the mask processing unit D102 first creates a masked factor list for the target alarm and records it in the list storage unit D106 (step C501). After that, the mask processing unit D102 determines whether there is an alarm whose alarm status is “occurring” recorded in the alarm status storage unit D107 among the alarms whose priority is higher than the priority of the target alarm. (Step C502).

  If such an alarm exists (YES in step C502), the recovery masked process is terminated.

  On the other hand, when such an alarm exists (NO in step C502), the alarm state recorded in the alarm state storage unit D107 is changed for each alarm whose identification information is set in the masked factor list. It is checked whether or not it is “occurring” (steps C503 and C504). For alarms whose alarm status is “occurring”, change the alarm status after masking to “occurring” for the alarm recorded in the alarm status storage unit D107 and identify the alarm. Information is passed to the delay / stretch processing unit D103 (step C505). When the above processing is performed for all alarms for which the alarm identification information of the masked factor list is set (when step C503 becomes YES), the mask processing unit D102 ends the masked processing at the time of restoration. The mask processing unit D102 deletes the mask factor list from the list storage unit D106 at the end of the occurrence mask process, and stores the list at the end of the masked process at the time of occurrence and at the end of the masked process at the time of recovery. The masked factor list is deleted from the part D106. In this embodiment, every time Steps C202 to C204 are executed, a mask factor list and a masked factor list are created based on the matrix table. A mask factor list may be created and recorded in the list storage unit D106.

  The above is the details of the mask processing performed in step C102 of FIG.

  When the mask process in Step C102 is completed, the Delay / Stretch process by the Delay / Stretch processing unit D103 is started (Step C103). In the Delay / Stretch process at Step C103, the processes shown in the flowcharts of FIGS. 11 and 12 are performed.

  When the delay / stretch processing unit D103 receives from the mask processing unit D102 the identification information of the alarm whose alarm state has changed after masking, the delay / stretch processing unit D103 refers to the alarm state storage unit D107 and masks the alarm specified by the identification information. It is determined whether the post-alarm status has changed to “occurring” or “not occurred” (step C601).

  If it is determined that the state has changed to “occurring” (YES in step SC601), the alarm identification information and the expiration time are incorporated into the alarm chain during delay on the chain storage unit D108 (step C602). Here, the expiration time of the alarm is a time obtained by adding a predetermined time to the current time. Thereafter, if the alarm identification information and the expiration time are connected to the head of the chain, the Delay / Stretch processing unit D103 sets the firing time in a Delay timer (not shown) (Step C603). Here, the same time as the expiration time is set as the ignition time.

  On the other hand, if it is determined that the status has changed to “not generated” (NO in step C601), the alarm identification information and the expiration time are incorporated into the alarm chain during the stretch on the chain storage unit D108, and then the alarm is identified. If the information and expiration time are connected to the head of the alarm, the firing time is set in a Stretch timer (not shown).

  When the Delay timer or the Stretch timer is fired, the Delay / Stretch processing unit D103 performs the process shown in the flowchart of FIG.

  When the Delay timer is fired (when the time set in the Delay timer is reached), the expiration time of the alarm connected to the head of the alarm chain during the delay is compared with the current time, and the current time indicates the alarm expiration time. It is determined whether or not it has passed (step C701).

  If the current time has passed the expiration time of the alarm (YES in step C701), an alarm is reported to an external system such as a maintenance management device (step C702). Specifically, an alarm occurrence notification including the identification information of the alarm connected to the head of the alarm chain during delay is transmitted to the external system. Next, the alarm identification information and the expiration time connected to the head of the alarm chain during delay are deleted, and then it is determined whether the alarm identification information and the expiration time are connected to the alarm chain during delay (step C704). ). If they are connected, the process returns to step C701 to perform the same process as described above. If they are not connected, the process ends.

  On the other hand, when the current time has not passed the alarm expiration time (NO in step C701), after setting the expiration time of the alarm connected to the head of the alarm chain during delay in the delay timer (step C705) The process is terminated.

  When the Stretch timer is fired, it is determined whether or not the expiration time of the alarm connected to the head of the alarm chain being stretched has passed the current time (step C701).

  If it has passed (YES in step C701), an alarm is reported to the external system. Specifically, an alarm recovery report including the identification information of the alarm connected to the head of the Stretch alarm chain is transmitted to the external system. Next, the alarm identification information and the expiration time connected to the head of the alarm chain being stretched are deleted, and then it is determined whether or not the alarm identification information and the expiration time are connected to the alarm chain being stretched (step C703). , C704). If connected (YES in step C704), the process returns to step C701 to perform the same process as described above. If not connected (NO in step C704), the process ends.

  On the other hand, if the current time has not passed the alarm expiration time (NO in step C701), after setting the alarm expiration time connected to the head of the alarm chain being stretched to the stretch timer (step C705) The process is terminated.

[Effect of the first embodiment]
According to the present embodiment, when narrowing down alarms to be presented to the administrator based on the priority, an alarm having a relatively high priority among the alarms that are generated without burdening the administrator. It becomes possible to present. The reason for this is that when an alarm that has changed from a non-occurring state to an occurring alarm is generated, if an alarm with a higher priority than the alarm is generated, the alarm is masked. .

  Further, in the present embodiment, when an alarm that has changed from a non-occurring state to an occurring alarm is generated, the alarm that has a lower priority than the above alarm and that is in the generating state is masked. Therefore, the alarms presented by the administrator can be narrowed down.

  In addition, since the present embodiment includes the Delay / Stretch processing unit D103, it is possible to prevent burst noise from being processed as an alarm.

D101 ・ ・ ・ Interrupt detector
D102 ・ ・ ・ Mask processing unit
D103 ・ ・ ・ Delay / Stretch processing part
D104 ... Storage device
D105 ... Matrix table storage
D106 ... List storage unit
D107 ・ ・ ・ Alarm status memory
D108 ・ ・ ・ Chain storage unit
R1 ・ ・ ・ Alarm register
R2 to R4: Change detection register

Claims (3)

For each of a plurality of alarms, a detection unit that detects that the state has changed,
A mask factor list for each alarm, the mask factor list containing the identification information of the high priority alarm than the self alarm, said a target mask factor list for each alarm priority than the own alarm A list storage unit in which a masked factor list including identification information of a low alarm is recorded ;
When the first alarm whose state has changed from non-occurrence to occurrence is detected by the detection unit, an alarm indicated by the identification information included in the mask factor list for the first alarm is being generated. For example, if the first alarm is masked so that its state has not occurred, and the alarm indicated by the identification information included in the masked factor list for the first alarm is occurring, the alarm is When the second alarm whose state has changed from occurring to non-occurring is detected by the detection unit, on condition that no alarm higher in priority than the second alarm has occurred, alarm control, characterized in that to release the mask has been applied to the alarm indicated by the identifier included in the mask factor list for the second alarm Location. An alarm control method executed by a computer including a detection unit, a mask processing unit, and a list storage unit ,
The list storage unit includes a mask factor list for each alarm, a mask factor list including alarm identification information having a higher priority than the own alarm, and a masked factor list for each alarm. A masked factor list containing identification information of an alarm having a lower priority than the alarm is recorded,
Wherein the detection unit is, for the alarm respectively, it detects that the state has changed,
The mask processing unit is indicated by identification information included in the mask factor list for the first alarm when the detection unit detects a first alarm whose state has changed from non-occurring to occurring. If an alarm is being generated, the first alarm is masked to make its state non-occurring, and the alarm indicated by the identification information included in the masked factor list for the first alarm is being generated If there is, the alarm is masked, and when the second alarm whose state has changed from occurring to not occurring is detected in the detection unit, no alarm having a higher priority than the second alarm is generated. On the condition that the mask applied to the alarm indicated by the identifier included in the masked factor list for the second alarm is released. Alarm control method to be. A mask factor list for each alarm, including a mask factor list including alarm identification information having a higher priority than the own alarm, and a masked factor list for each alarm, the priority being lower than the own alarm A program for causing a computer having a list storage unit recorded with a masked factor list including alarm identification information to function as an alarm control device,
The computer,
For each of a plurality of alarms, a detection unit that detects that the state has changed,
When the detection unit detects a first alarm whose state has changed from non-occurrence to occurrence, an alarm indicated by the identification information included in the mask factor list for the first alarm is being generated. For example, if the first alarm is masked so that its state has not occurred, and the alarm indicated by the identification information included in the masked factor list for the first alarm is occurring, the alarm is Masking, and when the second alarm whose state has changed from occurring to not occurring is detected in the detection unit, on condition that an alarm having a higher priority than the second alarm has not occurred, and to function as a mask processing unit for releasing the mask that has been subjected to the alarm indicated by the identifier included in the mask factor list for the second alarm Of the program.

Images