JPH117302A - Event notification processing method in redundant supervisory control system - Google Patents

Abstract

(57) [Summary] In an event notification processing method in a redundant supervisory control system, it is possible to prevent a reduction in processing capacity of a system due to an excessive processing load such as a multiplex event. SOLUTION: In a site-side information processing apparatus 3, 4, and 5, when the number of generated event notifications is larger than a predetermined multiple event threshold value, the event notifications are divided into two and a division mark is added. Then, the one event notification 7 with the division mark is transmitted to the main central information processing device 1 and the other event notification 8 is transmitted to the subordinate central information processing device 2. In the central information processing apparatuses 1 and 2 of the master system and the slave system, the received event notifications 7 and 8 with the division mark are processed in parallel, respectively.
The processed event information 9 and 10 are exchanged and re-integrated with each other.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an event notification processing method in a redundant supervisory control system, which prevents a reduction in the processing performance of a system due to an excessive processing load such as a multiplex event.

[0002]

2. Description of the Related Art In general, a redundant supervisory control system comprises a plurality of on-site information processing devices installed on a monitoring target side and a central information processing system comprising two main and sub systems installed in a monitoring room. And a device connected to the transmission path.

Conventionally, a method of processing an event notification in such a redundant monitoring and control system is such that an event notification having the same content is transmitted from a site-side information processing device to a master system and a slave center information processing device, respectively. The system-side and slave-side central information processing devices independently perform the same processing on the received event notifications. That is, the slave central information processing device performs exactly the same processing as the master central information processing device in parallel, and if the master central information processing device is stopped due to a failure or the like, monitoring is performed. Substitute control functions.

[0004]

In the above-described conventional event notification processing method, the slave central processing unit performs exactly the same processing as the master central processing unit. Therefore, there is no difference from an unduplicated system with respect to an excessive processing load such as a multiplex event, and the processing capacity of the system tends to decrease. For example, if a large number of events such as failures occur at once in the monitoring target, the event notification from the on-site information processing device will be congested, and consequently the related processing of the central information processing device will be congested. In the processing capacity of

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method for processing an event notification in a redundant supervisory control system so as to prevent a reduction in the processing capacity of the system due to an excessive processing load such as a multiplex event.

[0006]

According to the present invention, a central information processing device comprising two systems, a main system and a sub system, and a plurality of site information processors are connected to a transmission line, and In the event notification processing method in a redundant monitoring and control system that processes an event notification transmitted from a processing device in the central information processing device, the number of event notifications that occur in the site information processing device is a predetermined multiple event threshold. If the event notification is larger than this, the event notification is split into two,
One of the event notifications with the division mark is sent to the master central information processing device, and the other event notification is sent to the slave central information processing device. In the side information processing device, after each of the received event notifications with the division mark is processed in parallel,
Exchange processed event information to reintegrate with each other.

[0007] In the event notification processing method of the present invention, when a large number of events such as failures occur at once in the monitoring target of the redundant supervisory control system, that is, when the event is larger than a predetermined multiple event threshold value,
The site-side information processing device divides the event notification with the division mark added thereto into the master and slave central information processing devices and transmits the divided event notification. On the other hand, the master and slave central processing units process the received event notifications in parallel,
After completing various processes as the monitoring and control system, the event information for the division marks is exchanged and re-integrated with each other. As a result, the same event information is recorded in the master side information processing apparatus and the slave side central information processing apparatus, and the event notification can be processed with a processing load of about half at the peak.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS One embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing an example of a redundant supervisory control system used in the event notification processing method of the present invention. FIG. 2 is a flowchart showing internal processing related to event notification transmission in a site-side information processing apparatus. 9 is a flowchart showing internal processing related to event notification reception in the central information processing device.

In these figures, field-side information processing apparatuses 3, 4, and 5 are connected to a transmission path 6, collect the status of a monitoring target and changes thereof, and are connected to the transmission path 6 as an event notification. The information is transmitted to the main and slave central processing units 1 and 2, respectively. Primary and secondary central information processing devices 1,
2 analyzes the received event notification and converts it into event information, and then performs various processes as a monitoring control system. Various processes include screen display processing, printer printing processing,
Alarm processing and recording processing are included. Note that, depending on the type of processing, only the main processing unit 1 may perform the processing. This is often the case with printer print processing, alarm processing, and the like.

When an event occurs in the monitoring target (S21), the site-side information processing devices 3, 4, and 5 convert all events into event notifications (S22). Then, it is determined whether the total number of events is larger or smaller than a predetermined multiple event threshold (S23).

When the total number of event notifications is smaller than the multiple event threshold value, that is, in a normal state, the on-site information processing apparatuses 3, 4, and 5 are connected to the main central processing unit 1 and the auxiliary central processing unit 2. On the other hand, event notifications having exactly the same contents are transmitted (S28, S29). Note that a division mark described later is not added to the event notification in this case. Further, the multiple event threshold greatly depends on the hardware performance of the system and the like, and may be appropriately set.

Master and slave center information processors 1 and 2
Receives the event notification transmitted from the site-side information processing devices 3, 4, and 5 (S31), analyzes the received identical event notification without the added division mark in parallel, and converts it into event information ( After S32), various processes as the above-described monitoring control system are performed.

On the other hand, for example, the information processing device 4 on the second site side
It is assumed that 600 points of multiple events such as failures occur simultaneously in the monitoring target of, and the multiple event threshold is 400 points. The second site information processing device 4 temporarily converts all event groups into division mark-less event notifications (S22). At this time, it is determined that the number of event notifications is greater than the multiple event threshold value (S23), so that this event group is determined to be multiple events, and division marks are added to all event notifications (S24), and then 300 points each. Split into two (S
25). First, an event notification 7 with a division mark of the first 300 points is transmitted to the main central processing unit 1 (S2).
6) Yes. Next, the event notification 8 with the division mark of the latter 300 points is transmitted to the slave central processing unit 2 (S27).
I do.

The main central processing unit 1 analyzes the received event notification 7 with the division mark and outputs the event information 9.
After that, various processes as a supervisory control system are performed. Similarly, the slave central processing unit 2 also analyzes the received event notification 8 with the division mark and stores the event information 1
After the conversion to 0, various processes as a monitoring control system are performed. In this case, the master and slave center information processing devices 1
No. 2 is processing different event notifications 7 and 8 in parallel.

After a series of processes related to the above-mentioned event notification is completed, that is, after the processing load is reduced, the central information processing devices 1 and 2 re-export the event information 9 and 10 by the event notifications 7 and 8 with the division mark. Integrate. The slave central processing unit 2 transmits an event notification 10 corresponding to the event notification 8 with the division mark to the master central processing unit 1. Similarly, the master central processing unit 1 also transmits an event notification 9 corresponding to the division-marked event notification 7 to the slave central processing unit 2. As a result, the same event information is recorded in the master and slave central information processing apparatuses 1 and 2, and the event notification is processed with a processing load of about half at the peak.

[0016]

As described above, according to the present invention, in a redundant supervisory control system, an event notification with a division mark is divided into two main and sub-system central information processors by a local information processor. The central processing unit exchanges event information after parallel processing of the received event notifications with division marks, and reintegrates them with each other to process the system due to excessive processing load such as multiple events. The effect of preventing a decrease in performance can be obtained.

[Brief description of the drawings]

FIG. 1 is a configuration diagram showing an example of a redundant supervisory control system used in an event notification processing method of the present invention.

FIG. 2 is a flowchart showing internal processing related to event notification transmission in the site-side information processing apparatus.

FIG. 3 is a flowchart showing internal processing related to event notification reception in the central information processing device.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 master central information processing device 2 slave central information processing device 3, 4, 5 site information processing device 6 transmission path 7, 8 event notification 9, 10 event information

Claims (1)

[Claims] 1. An event notification transmitted from a site-side information processing device, wherein a central-side information processing device comprising two systems, a main system and a slave system, and a plurality of site-side information processing devices are connected to a transmission path. In the event notification processing method in a redundant monitoring and control system that processes the event notification in the central information processing device, the event notification is performed when the number of generated event notifications is larger than a predetermined multiple event threshold value. Is divided into two, a division mark is added, and one event notification with the division mark is sent to the master central information processing device, and the other event notification is sent to the slave central information processing device. The main-side and slave-side central information processing devices transmit the received event notifications with the division mark in parallel with each other. After, to exchange event information processed and to re-integrate with each other, the event notification processing method in duplex monitoring control system, characterized in that.