JP2013050828A - Plant monitoring device and plant data backup method therefor - Google Patents

Abstract

PROBLEM TO BE SOLVED: To back up plant data on a plant monitoring device stably.SOLUTION: A plant monitoring device 1 includes a plant monitoring processing part 3 that receives a process signal 21 from plant equipment 41 for alarm output processing, a plant data storage device 9 for storing plant data 24 on alarm output processing, an event input part 6 for inputting execution schedule of alarm output processing by the plant monitoring processing part 3 as an alarm output processing event 23, a schedule determination part 7 that determines access timing by the plant monitoring processing part 3 on the basis of the alarm output processing event 23 and avoids access timing from backup schedule time 25 for determining backup schedule 26, and a backup processing device 10 that backs up the plant data 24 in the plant data recording device 9 to an external storage device 11 according to the backup schedule 26.

Description

  The present invention relates to a plant monitoring apparatus that backs up plant data in an external recording device and a plant data backup method thereof.

  Plant monitoring devices installed in nuclear power plants and other power plants operate continuously for the purpose of grasping the status of plant equipment not only during plant operation but also during plant inspections such as periodic inspections. Plant data indicating the temperature and pressure of the plant is sequentially recorded in the plant data storage device. Plant data stored in the plant data storage device is backed up in an external storage device and used for plant behavior analysis, performance inspection of plant equipment, and the like.

  In the conventional method for backing up plant data, a plant operator connected an external storage device to the plant monitoring device during manual inspection and manually performed backup. However, since periodic inspections are conducted over a long span of several months to several years, in the unlikely event that an inappropriate event occurs in the plant and the plant monitoring system stops, the plant data from the previous backup time until the inappropriate event occurs Backup may not be possible.

  Therefore, a technology has been developed in which plant monitoring devices are provided in separate buildings as a master computer and a backup computer, and the plant data in the master computer is backed up to the backup computer at a predetermined periodic backup timing such as every day. (For example, refer to Patent Document 1).

JP-A-11-95804

  Here, an alarm output process is an important function of the plant monitoring apparatus. The alarm output process is a process for issuing an alarm to the central control room when the process signal received from the plant equipment deviates from the normal range deviation limit value, and further writing the plant data related to the alarm output process in the plant data storage device.

  When the backup timing from the master side computer to the backup side computer overlaps with the access timing for writing the plant data related to the alarm output processing, the technique described in Patent Document 1 described above is directed to a mistake in writing the plant data or to the plant monitoring device. May occur.

  Then, an object of this invention is to provide the plant monitoring apparatus which can back up plant data stably.

  In order to achieve the above object, a plant monitoring apparatus of the present invention receives a process signal from a plant device, compares it with a normal range deviation limit value, performs a warning output process, and a plant monitoring processing unit. A plant data storage device capable of accessing and storing plant data related to alarm output processing, an event input unit for inputting an execution schedule of alarm output processing by the plant monitoring processing unit as an alarm output processing event, and a predetermined backup Based on the rule table storing the scheduled backup time and the alarm output processing event input to the event input unit, the access timing to the plant data recording device by the plant monitoring processing unit is determined, and the access timing is determined from the scheduled backup time. Avoid backup schedules And a schedule determining section for constant read plant data in the plant data recording apparatus according to the backup schedule determined by the schedule determining section, characterized in that it comprises a backup processor for backup to an external storage device.

  Furthermore, in order to achieve the above object, a plant data backup method of the present invention includes a plant monitoring process step for receiving a process signal from a plant device, comparing it with a normal range deviation limit value, and performing an alarm output process, and the plant monitoring process. The plant data storage step for storing the plant data related to the warning output processing performed in the processing step in the plant data storage device, and the execution schedule of the warning output processing by the plant monitoring processing step are input as warning output processing events, and this warning output Based on the processing event, it determines the access timing to the plant data recording device in the plant data storage process, and determines the backup schedule by avoiding the access timing from the predetermined scheduled backup time, and this schedule determination process Reading plant data in the plant data recording apparatus according to the constant backup schedule, characterized in that it comprises a backup process to backup the external storage device.

  ADVANTAGE OF THE INVENTION According to this invention, the plant data of a plant monitoring apparatus can be backed up stably.

1 is a schematic block diagram of a plant monitoring apparatus according to a first embodiment of the present invention. Schematic which shows the example of the plant table part of the plant monitoring apparatus which concerns on the 1st Embodiment of this invention. Schematic which shows the example of the rule table of the plant monitoring apparatus which concerns on the 1st Embodiment of this invention. The schematic block diagram of the plant monitoring apparatus which concerns on the 2nd Embodiment of this invention. The schematic block diagram of the plant monitoring apparatus which concerns on the 3rd Embodiment of this invention.

  Embodiments of the present invention will be described below.

(First embodiment)
(Constitution)
Hereinafter, a plant monitoring apparatus according to a first embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG. 1 is a schematic block diagram of a plant monitoring apparatus according to the first embodiment of the present invention. The plant monitoring apparatus 1 includes a plant table unit 2, a plant monitoring processing unit 3, an operation log processing unit 4, a maintenance information processing unit 5, an event input unit 6, a schedule determination unit 7, a rule table 8, It comprises a plant data storage device 9 and a backup processing device 10. Further, plant equipment 41 and an external storage device 11 are connected to the plant monitoring apparatus 1.

  The plant equipment 41 includes pumps, motors, valves, and the like provided at various locations in the plant. The process signals 21a, 21b, and 21c that indicate the temperature, pressure, flow rate, and the like are provided for plant monitoring by sensors and actuators that are provided respectively. It is a device that transmits to the device 1. The external storage device 11 is a storage medium such as an HDD (Hard Disk Drive) or an optical disk.

  Hereinafter, the connection relationship of each component of the plant monitoring apparatus 1 will be described. The plant table unit 2, the plant monitoring processing unit 3, and the operation log processing unit 4 receive the process signals 21a, 21b, and 21c from the plant equipment 41, respectively, and the plant table unit 2, the plant monitoring processing unit 3, and the operation log processing. The unit 4 is connected to the plant equipment 41.

  The plant monitoring processing unit 3 is connected to the plant table unit 2 so that the plant monitoring processing unit 3 can receive the specific plant operation state information 22 from the plant table unit 2.

  The maintenance information processing unit 5 receives the maintenance information 27a, 27b, and 27c from the plant table unit 2, the plant monitoring processing unit 3, and the operation log processing unit 4, respectively. 2 and the plant monitoring processing unit 3 and the operation log processing unit 4.

  The event input unit 6 is connected to the plant table unit 2 so that the specific plant event 23 a can be received from the plant table unit 2. Furthermore, the event input unit 6 is connected to the plant monitoring processing unit 3 so that the alarm output processing event 23b can be received from the plant monitoring processing unit 3.

  The event input unit 6 is connected to the operation log processing unit 4 so that the log recording event 23 c can be received from the operation log processing unit 4. Further, the event input unit 6 is connected to the maintenance information processing unit 5 so that the event input unit 6 can receive the maintenance event 23 d from the maintenance information processing unit 5.

  The schedule determining unit 7 is connected to the event input unit 6 so that the plant event information 23 can be received from the event input unit 6. Further, the schedule determination unit 7 is connected to the rule table 8 so that the scheduled backup time 25 can be received from the rule table 8.

  The plant data storage device 9 stores plant data so that it can receive the monitoring process data 24b, the log data 24c, and the maintenance data 24d from the plant monitoring processing unit 3, the operation log processing unit 4, and the maintenance information processing unit 5, respectively. The apparatus 9 is connected to the plant monitoring processing unit 3, the operation log processing unit 4, and the maintenance information processing unit 5.

  The backup processing device 10 is connected to the schedule determination unit 7 so that the backup processing device 10 can receive the backup schedule 26 from the schedule determination unit 7. Further, the backup processing device 10 is connected to the plant data storage device 9 so that the plant data 24 can be read from the plant data storage device 9.

  The external storage device 11 is detachably connected to the backup processing device 10 so that the external storage device 11 can receive the plant data 24 from the backup processing device 10.

(Function)
The operation of the first embodiment of the present invention will be described below. First, basic operations of the plant table unit 2, the plant monitoring processing unit 3, and the operation log processing unit 4 will be described, and a backup method of the plant data 24 to the external storage device 11 by the backup processing device 10 will be described later.

  The plant table unit 2 receives the process signal 21a from the plant device 41, and automatically determines the plant operation state by determining the state using a logical table with the state of the plant device 41 as an input. FIG. 2 is a schematic diagram illustrating an example of a plant table unit of the plant monitoring apparatus according to the first embodiment of the present invention. As shown in FIG. 2, the opening degree of the valve and the pump activation obtained from the process signal 21 are applied to the logical table, and the plant operating state indicating that the activation of a predetermined system is necessary can be determined.

  Among the plant operating states determined by the plant table unit 2, the specific plant operating state requiring operation of the predetermined plant equipment 41 such as starting or stopping of a predetermined system, increasing or decreasing the output of the plant is specified plant operating state information 22. To the plant monitoring processor 3 and used for automatic plant processing by the plant monitoring processor 3 described later. Information indicating the operation of a predetermined plant 41 can be added to the specific plant operation state information 22.

  The plant monitoring processing unit 3 compares the process value obtained from the process signal 21b received from the plant equipment 41 with the normal range deviation limit value, and performs an alarm output process for outputting an alarm to the central control room when the process value deviates from this. . The plant monitoring processing unit 3 receives the specific plant operation state information 22 from the plant table unit 2, and performs plant automatic processing for automatically starting and stopping the plant equipment 41 based on the specific plant operation state. For example, when the specific plant operation state indicates activation of a predetermined system, the plant monitoring processing unit 3 automatically processes the operation of the plant equipment 41 that activates the predetermined system.

  Further, the plant monitoring processing unit 3 accesses the plant data storage device 9 when executing the alarm output process and the plant automatic process, and the contents of the alarm output process, the process value, the plant equipment 41 that has performed the plant automatic process, and the process contents, respectively. The information shown is transmitted and stored in the plant data storage device 9 as monitoring process data 24b.

  In addition, the plant monitoring processing unit 3 automatically displays the operation values necessary for monitoring and operation of the plant operator, and the process values are visualized with graphics and symbol patterns to indicate the operation status of each system of the plant. Graphic processing for drawing, message processing for outputting a plant state change to a CRT screen or a printer, and the like can be performed.

  The operation log processing unit 4 accumulates the process signal 21 indicating the flow rate, pressure, and temperature from the plant equipment 41 as plant performance data indicating the operation efficiency, life consumption, etc. of the plant, and this is on the hour, 10 minutes, and 6 hours. The plant data storage device 9 is accessed at a predetermined log storage timing such as 24 hours, every month, and transmitted and stored as log data 24c in the plant data storage device 9.

  The maintenance information processing unit 5 stores, as maintenance information 27a, 27b, and 27c, state logs and execution records created internally by application software that executes the plant table unit 2, the plant monitoring processing unit 3, and the operation log processing unit 4, respectively. The maintenance data 24d is generated by receiving and integrating. Further, the plant data storage device 9 is accessed at a predetermined maintenance timing, and the maintenance data 24d is transmitted and stored. This assists the analysis in the event of a software malfunction or trouble in the plant monitoring device 1.

  As described above, the plant monitoring processing unit 3, the operation log processing unit 4, and the maintenance information processing unit 5 transfer the monitoring processing data 24b, the log data 24c, and the maintenance data 24d to the plant at an access timing under a predetermined time or under a certain condition, respectively. Data is transmitted to the data storage device 9 and stored.

  Here, during the access to the plant data storage device 9 by any of the plant monitoring processing unit 3, the operation log processing unit 4 and the maintenance information processing unit 5, the plant data 24 is transferred from the plant data storage device 9 by the backup processing device 10. If backup is performed on the read external storage device 11, there is a risk that the monitoring processing data 24b, the log data 24c, and the maintenance data 24d may be mistakenly recorded and a processing load may occur on the plant monitoring device 1.

  Accordingly, a method for performing backup by the backup processing device 10 by the backup processing device 10 while avoiding access timing to the plant data storage device 9 by the plant monitoring processing unit 3, operation log processing unit 4, and maintenance information processing unit 5 will be described below. To do.

  When the plant monitoring processing unit 3 determines the execution of the alarm output process based on the deviation of the normal range deviation limit value of the process value described above, the alarm output process event indicating the execution schedule of the alarm output process prior to the execution of the alarm output process 23b is transmitted to the event input unit 6. The alarm output process event 23b is added with the scheduled start time and end time of the alarm output process. Furthermore, information such as the data type, data capacity, and scheduled recording time of the monitoring process data 24b transmitted to the plant data recording device 9 in the execution of the alarm output process can be added to the alarm output process event 23b.

  Moreover, the plant table part 2 transmits the specific plant event 23a which shows the execution schedule of the plant automatic process by the plant monitoring process part 3 based on a specific plant operation state to the event input part 6, when determining a specific plant operation state. To the specific plant event 23a, the plant equipment 41 that the plant monitoring processing unit 3 performs automatic plant processing based on the specific plant operation state, the processing content, the scheduled execution time of the automatic plant processing, and the like can be added.

  Furthermore, the operation log processing unit 4 transmits the recording schedule of the log data 24c to the plant data storage device 9 to the event input unit 6 as a log recording event 23c. The log recording event 23c can be added with the start and end scheduled times of log storage timing.

  In addition, the maintenance information processing unit 5 transmits the recording schedule of the maintenance data 24d to the plant data storage device 9 to the event input unit 6 as a maintenance event 23d. The maintenance event 23d can be added with scheduled start and end times of maintenance timing.

  The event input unit 6 receives the specific plant event 23 a, the warning output processing event 23 b, the log recording event 23 c, and the maintenance event 23 d, integrates them, and transmits the integrated event as plant event information 23 to the schedule determination unit 7. The schedule determination unit 7 receives the plant event information 23 from the event input unit 6 described above, and determines the access timing to the plant data storage device 9 of the plant monitoring processing unit 3, the operation log processing unit 4, and the maintenance information processing unit 5. To do.

  For example, the access timing by the alarm output process of the plant monitoring processing unit 3 can be determined as the access timing with the scheduled start time and end time of the alarm output process indicated by the alarm output process event 23. Further, when information such as the type, capacity, and scheduled recording time of the monitoring process data 24b is added to the alarm output process event 23, plant monitoring is actually performed from the start of the alarm output process to the end of the process based on such information. The time when the processing unit 3 accesses the plant data storage device 9 can be determined as the access timing.

  Furthermore, the access timing by the plant automatic processing of the plant monitoring processing unit 3 can be determined by the processing contents and the scheduled execution time of the plant automatic processing of the plant monitoring processing unit 3 indicated by the specific plant event 23a. By determining the access timing using the specific plant event 23a indicating the specific plant operation state, the access timing by the plant automatic processing can be determined before the plant monitoring processing unit 3 executes the plant automatic processing.

  The rule table 8 stores a scheduled backup time 25 that is the date and time when the backup is scheduled to be executed. FIG. 3 is a schematic diagram illustrating an example of a rule table of the plant monitoring apparatus according to the first embodiment of the present invention. As shown in FIG. 3, in each backup scheduled time 25 indicating the scheduled backup date and scheduled start time, information specifying the type of backup such as differential backup or incremental backup, and information specifying the location of data to be backed up Can be added. Here, the differential backup is a method of backing up the differential plant data 24 from the previous backup, and the incremental backup is a method of backing up the incremental plant data 24 from the previous backup.

  The schedule determination unit 7 receives the scheduled backup time 25 from the rule table 8 and determines a backup schedule 26 that performs backup at a time that avoids the access timing determined using the plant event information 23 from the scheduled backup time 25.

  The backup processing device 10 receives the backup schedule 26 from the schedule determination unit 7, reads the plant data 24 necessary for backup from the plant data storage device 9 based on the backup schedule 26, and performs backup to the external storage device 11.

  Further, when the access timing can be regularly predicted, such as when the log data 24c is recorded by the operation log processing unit 4, the schedule determination unit 7 predicts the next access occurrence from the end of the access being executed in the plant data storage device 9. It is also possible to determine the backup schedule 26 so that the backup is performed again before the time. Further, when the access to the plant data storage device 9 that occurs irregularly by the plant monitoring processing unit 3 and the scheduled backup time 25 overlap, the backup schedule 26 is determined so that the backup is performed again after the access is completed. You can also.

  As a backup mode, full backup data of the plant data storage device 9 is created in the external storage device 11 during periodic inspection of the plant, and after the plant operation is resumed, incremental backup from the full backup data of the plant data storage device 9 or Assume that a differential backup is created in the external storage device 11.

(effect)
According to the first embodiment of the present invention, a backup schedule is determined by avoiding access timing to the plant data storage device 9 by the plant monitoring processing unit 3, the operation log processing unit 4, and the maintenance information processing unit 5, and this backup By performing the backup by the backup processing device 10 based on the schedule, the plant monitoring processing unit 3, the operation log processing unit 4, and the maintenance information processing unit 5 can be stably accessed without affecting the plant data storage device 9. The plant data 24 can be backed up in the external storage device 11.

(Second Embodiment)
(Constitution)
Hereinafter, a plant monitoring apparatus according to a second embodiment of the present invention will be described with reference to FIG. The same parts as those of the plant monitoring apparatus according to the first embodiment are denoted by the same reference numerals, and the description of the same configuration is omitted.

  FIG. 4 is a schematic block diagram of a plant monitoring apparatus according to the second embodiment of the present invention. The second embodiment is different from the first embodiment in that a backup cancel device 13 and a backup request device 14 are newly provided. The backup canceling device 13 and the backup requesting device 14 can be provided as touch buttons that are displayed on the touch panel display of the console in the central control room or as push buttons on the control panel or the like.

  The backup cancellation device 13 is connected to the schedule determination unit 7 so that the backup cancellation device 13 can transmit the backup cancellation signal 31 to the schedule determination unit 7. Further, the backup request device 14 is connected to the schedule determination unit 7 so that the backup request device 14 can transmit the backup request signal 32 to the schedule determination unit 7.

(Function)
The operation of the second embodiment of the present invention will be described below. When the plant equipment 41 is inspected at the time of periodic inspection, when it is predicted that the plant monitoring apparatus 1 will be in a state outside the normal operation, for example, when the application software operating on the plant monitoring apparatus 1 is replaced, In some cases, the backup by the backup processing device 10 may be intentionally stopped at the judgment of the plant operator.

  In such a case, the backup canceling device 13 can instruct to cancel the backup forcibly. By pressing the button of the backup canceling device 13 once, the backup canceling signal 31 is transmitted to the schedule determining unit 7. The schedule determination means 7 determines the backup schedule 26 so as not to perform backup while receiving the backup cancellation signal 31, and the backup processing apparatus 10 receives this and stops backup.

  When returning to the normal operation state, the transmission of the backup cancel signal 31 is canceled by pressing the button of the backup cancel device 13 again, and the schedule determination unit 7 again uses the rule table 8 and the event input unit 6 to perform backup. Resume schedule determination.

  On the other hand, even if it is outside the range of the backup schedule, the plant data 24 in the plant data storage device 9 may be lost due to, for example, an emergency earthquake, fire, virus intrusion, DoS (Denial of Service) attack, etc. In some cases, the plant data 24 in the plant data storage device 9 may be forcibly backed up for the purpose of subsequent analysis.

  In such a case, the plant operator pushes the button of the backup request device 14 to transmit the backup request signal 32 to the schedule determination unit 7. After receiving the backup request signal 32, the schedule determination unit 7 immediately determines a backup schedule for performing backup and performs backup by the backup processing device 10.

(effect)
According to the second embodiment of the present invention, by providing the backup canceling device 13 and the backup requesting device 14, in addition to the backup according to the scheduled backup time 25 recorded in the rule table 8, according to the situation of the plant. The plant operator can easily change the backup schedule.

(Third embodiment)
(Constitution)
Hereinafter, a plant monitoring apparatus according to a third embodiment of the present invention will be described with reference to FIG. The same parts as those of the plant monitoring apparatus according to the first embodiment are denoted by the same reference numerals, and the description of the same configuration is omitted.

  FIG. 5 is a schematic block diagram of a plant monitoring apparatus according to the third embodiment of the present invention. The third embodiment differs from the first embodiment in that backup data transfer means 12 is newly provided. The backup data transfer means 12 and the backup processing apparatus 10 are connected so that the backup data transfer means 12 can receive the plant data 24 from the backup processing apparatus 10.

  Further, an external plant monitoring device 1b having an external plant data storage device 52 is provided outside the plant building. A data restore device 13 is provided in the external plant monitoring device 51. The data restore device 13 and the backup data transfer means 12 are connected so that the data restore device 13 can receive the plant data 24 from the backup data transfer means 12.

(Function)
The operation of the third embodiment of the present invention will be described below. The backup processing device 10 reads the plant data 24 from the plant data storage device 9 based on the backup schedule 26 and transmits it to the backup data transfer means 12. The backup data transfer unit 12 receives the plant data 24 and transmits it to the data restoration device 13 in the external plant monitoring device 51.

  The data restoration device 13 receives the plant data 24 from the backup data transfer means 12 and records it in the external plant data storage device 52, and the plant data 24 having the same data structure as that of the plant data storage device 9 in the plant monitoring device 1. The external plant data storage device 52 is restored and built.

  Since the external plant monitoring device 51 is arranged outside the plant building outside the plant building and does not need to have the configuration of the plant monitoring processing unit 3 or the like in the plant monitoring device 1, the access timing to the external plant data storage device 52 Therefore, the data restoration device 13 can store the plant data 24 in the external plant data storage device 52 and read and analyze the restored plant data 24 as needed.

(effect)
According to the third embodiment of the present invention, the plant data 24 of the plant monitoring device 1 is restored and built in the external plant data storage device 52 in the external plant monitoring device 51 arranged outside the plant building. The plant monitoring data and maintenance information of the monitoring device 1 can be obtained outside the plant building, and the reliability and maintainability of the plant monitoring device 1 can be improved.

  Further, when the plant data 24 stored in the plant data storage device 9 in the plant monitoring device 1 is lost, the plant data 24 in the external plant monitoring device 52 is read using the data restoration device 13 and the data restoration device. The data can be restored by transmitting the data to the plant data storage device 9 in the plant monitoring device 1 and storing it via 13.

  Further, the data restore device 13 may be provided in the plant monitoring device 1. In this case, the plant data 24 is read from the external storage device 11 by the data restoration device 13 and the plant data 24 is written to the plant data storage device 9, so that the plant data 24 is stored in the plant data storage device 9 by the external storage device 11. Can be restored.

  Needless to say, the embodiment of the present invention is not limited to the above-described embodiment. For example, the types and number of plant devices 41 connected to the plant monitoring device 1 and the process signals 21a, 21b, and 21c to be transmitted can be changed as appropriate depending on the application of the plant monitoring device 1 and the scale of the plant.

  In addition, the plant monitoring processing unit 3 automatically performs an emergency process for automatically switching the operation screen of the plant operator, a graphic process for visualizing the process values with graphics and symbol patterns and drawing the operation status of each plant system, a CRT screen, When message processing for outputting a plant state change to the printer is performed, and when data related to the processing is stored in the plant data storage device 9, an event input is performed with the execution schedule of these processes or the data recording schedule as an event. You may input into the part 6. At this time, the event input unit 6 determines the access timing of the plant monitoring processing unit 3 due to these events, and the schedule determination unit 7 determines the backup schedule while avoiding this access timing, so that the emergency of the plant monitoring processing unit 3 Backup can be performed while avoiding access to the plant data storage device 9 by time processing, graphic processing, and message processing.

  Note that the first to third embodiments described above can be combined as appropriate.

DESCRIPTION OF SYMBOLS 1 ... Plant monitoring apparatus 2 ... Plant table part 3 ... Plant monitoring process part 4 ... Operation log process part 5 ... Maintenance information processing part 6 ... Event input part 7 ... Schedule Decision unit 8 ... rule table 9 ... plant data storage device 10 ... backup processing device 11 ... external storage device 12 ... data restore device 13 ... backup cancel device 14 ... backup request Device 15 ... Backup data transfer device 21a, 21b, 21c ... Process signal 22 ... Specific plant operation state information 23 ... Plant event information 23a ... Specific plant event 23b ... Alarm output processing event 23c: Log recording event 23d: Maintenance event 24: Plant data 24b: Monitoring processing data 4c: log data 24d: maintenance data 25 ... scheduled backup time 26 ... backup schedules 27a, 27b, 27c ... maintenance information 31 ... backup stop signal 32 ... backup request signal 41 ... Plant equipment 51 ... External plant monitoring device 52 ... External plant data storage device

Claims (8)

A plant monitoring processor that receives a process signal from the plant equipment, compares it with a normal range deviation limit value, and performs an alarm output process;
A plant data storage device that can be accessed by the plant monitoring processing unit and store plant data related to the alarm output processing,
An event input unit that inputs an execution schedule of the alarm output process by the plant monitoring processor as an alarm output process event;
A rule table storing a predetermined scheduled backup time for backup, and
Based on the alarm output processing event input to the event input unit, the access timing to the plant data recording device by the alarm output processing of the plant monitoring processing unit is determined, and the access timing is determined from the scheduled backup time. A schedule determination unit that determines the backup schedule by avoiding,
A plant monitoring apparatus comprising: a backup processing device that reads the plant data in the plant data recording device according to the backup schedule determined by the schedule determination unit and backs up the data to an external storage device. With the plant equipment state as an input, further comprising a plant table unit for determining the plant operating state,
The specific plant operating state is determined by the plant table unit in the event input unit and the plant operating state is determined, and the specific plant indicating the execution schedule of the plant automatic processing by the plant monitoring processing unit based on the specific plant operating state Enter the event
The plant monitoring processing unit performs the plant automatic processing based on the specific plant operation state, and records the plant data related to the plant automatic processing in the plant data storage device,
The schedule determination unit determines the access timing to the plant data recording device by the plant automatic processing of the plant monitoring processing unit based on the specific plant event input to the plant table unit, and the access timing The plant monitoring apparatus according to claim 1, wherein the backup schedule is determined while further avoiding the process. An operation log processing unit that records the plant data received from the plant equipment at a predetermined time in the plant data recording device;
The event input unit further records an execution schedule of the log recording by the operation log processing unit as a log recording event,
The schedule determination unit determines the access timing to the plant data recording device by the operation log processing unit based on the log recording event stored in the plant table unit, and further avoids the access timing and performs the backup The plant monitoring apparatus according to claim 1 or 2, wherein a schedule is determined. A maintenance information processing unit that records maintenance information of application software for executing the plant monitoring processing unit in the backup data storage device;
The event input unit further records a record of the maintenance information by the maintenance information processing unit as a maintenance event,
The schedule determination unit determines an access timing to the plant data recording device by recording the maintenance information by the maintenance information processing unit based on the maintenance information recording event stored in the plant table unit, and this access The plant monitoring apparatus according to any one of claims 1 to 3, wherein the backup schedule is determined while avoiding further timing.   The plant monitoring according to any one of claims 1 to 5, further comprising a backup canceling device that can manually and forcibly cancel the backup being executed in the backup data storage device. apparatus.   The apparatus further comprises a backup request device that can manually and forcibly perform backup to the external storage device by the backup data storage device regardless of the backup schedule determined by the schedule determination unit. The plant monitoring apparatus according to any one of claims 1 to 5. An external plant monitoring device having a data restoration device and an external plant data storage device inside;
A data transfer device capable of receiving the plant data from the backup processing device and transferring the plant data to the data restore device;
The plant monitoring device according to claim 1, wherein the data restoration device stores the received plant data in the external plant data storage device. A plant monitoring process that receives a process signal from the plant equipment, compares it with a normal range deviation limit value, and performs an alarm output process;
A plant data storage step of storing in the plant data storage device plant data related to the alarm output processing performed by the plant monitoring processing step;
The execution schedule of the alarm output process by the plant monitoring process step is input as an alarm output process event, and based on this alarm output process event, the access timing to the plant data recording device in the plant data storage process is determined, A schedule determination step of determining a backup schedule by avoiding the access timing from a predetermined scheduled backup time;
A plant data data backup method comprising: a backup processing step of reading the plant data in the plant data recording device according to the backup schedule determined by the schedule determination step and backing up the data to an external storage device.

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