JPS62264397A - Alarm display system - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to an alarm display system for displaying alarms in various industrial plants.

(Prior Art) Fig. 3 shows a block diagram of a conventional alarm display system. This system is installed in the central control room of a power plant, etc., and when some abnormality is detected in the plant 1,
An alarm signal Si is input to the arithmetic and control unit 2. Based on the alarm signal S1, the arithmetic and control unit 2 determines the annunciator exit bag [3].

Outputs alarm position notification signal. The annunciator output device 3 lights up the lamp in the corresponding alarm display window of the illuminated alarm display panel 4 in accordance with the alarm position notification signal. The operator knows the type of abnormality by lighting this lamp, determines the location of the abnormality, and performs recovery work. Also, during normal times, the test switch 5 is pressed to light all the lamps on the illuminated alarm display panel 4.

Checking for burned out lamps.

(9! The main point while Akira is trying to solve the problem) By the way, when performing restoration work on an abnormality as described above, 1. Even if the abnormality discovered is a highly reliable place that has never experienced an abnormality in the past. For example, it is sufficient to take measures to eliminate the cause of the current abnormality. However, if the location is unreliable and has experienced abnormalities many times in the past, it is desirable to perform more rigorous checks and take countermeasures, taking into consideration not only the current situation but also possible causes of past abnormalities.

However, conventional alarm display systems only issue a warning when an abnormality occurs as described above, and the location of the abnormality is
Since it was not possible to determine whether the reliability was high or low, there was a problem in that it was not possible to take appropriate measures as described above depending on the location where the abnormality occurred.

SUMMARY OF THE INVENTION An object of the present invention is to solve this problem and provide an alarm display system that can take appropriate measures depending on the location where an abnormality occurs.

[Invention 0 configuration] (Means for solving the problem) The present invention stores the details and date and time of occurrence in a storage device as historical information every time an abnormality is detected in a plant, and stores the contents and date and time of occurrence in a storage device. This system calculates the frequency of abnormality occurrence at the abnormality detected based on the detected abnormality location, and displays the above abnormality occurrence frequency together with an alarm display, while also testing the functions of the above abnormality occurrence frequency calculation and the above alarm display for any location during normal times. It is.

(Function) From this, when an alarm is displayed, the operator can determine the reliability of the location where the abnormality has occurred, so that appropriate measures can be taken depending on the location.

(Example) Embodiments of the present invention will be described below based on the drawings.

FIG. 1 is a block diagram of an alarm display system according to an embodiment of the present invention. In this figure.

The same reference numerals as in FIG. 3 indicate the same parts. Also, this figure differs from Figure 3 in that a storage device 6 is provided, an alarm frequency signal F is output from the arithmetic processing unit 2, and the display panel for displaying alarms uses LEDs to indicate when an abnormality has occurred. In addition, the test switch 5 is composed of a large number of switch groups, and the output signal is sent to the arithmetic and control device! ! This is the point entered in step 2.

The operation in this configuration is shown in the flowchart of FIG. When an abnormality in the plant 1 is detected (processing 10), an alarm signal Si indicating the abnormality location is input to the calculation and control unit 2 (processing 11).

Each time the alarm signal Si is input, the date and time of alarm occurrence for each signal is stored in the storage device 6 as history information, and the stored past history information is read out (processing 12). Then,
The alarm signal Si is compared with the above history information, and if the alarm signal Si is the first time, the frequency of showing yellow (number a F) is created (process 14 from No in process 13).

If it is not the first time, if it is within a preset specified number of times, a frequency signal F indicating orange is created. Process 1
Processing IG from '/ES in Processing 15), and creates a frequency signal F that indicates a red signal if the number of times is greater than the specified number (T in Processing 15).
Processed by ES17).

Next, the arithmetic and control device 2 outputs the alarm position notification signal corresponding to the alarm signal Si and the frequency signal F to the annunciator output device 3. The annunciator output device 3 drives the LED fault display panel 7 according to these signals. As a result, the type of abnormality that occurred when the light emitting diode at a specific position on the LED failure display panel 7 lights up is displayed (process 18), and the color of the light emitting diode that was lit at the same time indicates the abnormality from the past at the abnormal location. The occurrence@degree is displayed (process 19).

The operator determines the location of the abnormality based on the display on the LED fault display panel 7, and performs restoration work. At this time.

The display above shows whether or not the area has experienced abnormality in the past, and how frequently it has occurred.
In addition to eliminating the cause of the abnormality at that time, we will conduct a more rigorous operation check of related equipment in areas where abnormalities occur frequently, and if it is determined that the reliability of equipment or parts is low, we will By taking measures such as replacing it with a more reliable one, the reliability of the entire system can be improved.

By the way, the test switch 5 shown in FIG.
A pushbutton switch corresponding to n is provided, and when this pushbutton switch is arbitrarily selected and pressed (process 20 in FIG. 2), a corresponding signal is input to the arithmetic and control unit W12. At this time, the arithmetic and control unit 12 does not perform storage processing as history information, but performs the same operation as when the alarm signal Si corresponding to the pressed pushbutton switch is input (processes 12 to 19 in the figure). ), thereby making it possible to test the operation of the alarm display system, and to know the frequency of past abnormality occurrences at each location at any time from the display on the LED fault display panel 7.

Furthermore, since such a display is performed using an LED, the reliability of the display section is improved compared to a conventional incandescent lamp.

As described above, in this embodiment, when an abnormality in the plant 1 is detected, the arithmetic and control unit! ! 2 stores the content and date and time of occurrence as historical information! Store it in I6.

Calculate the frequency of occurrence of the abnormality based on past historical information,
An LED failure display panel 7 displays the type of abnormality and the frequency of occurrence. This allows the reliability of the abnormal location to be determined, allowing appropriate measures to be taken during recovery work. In addition, by operating the test switch 5, it is possible to not only test whether a lamp has burnt out as in the conventional case, but also test the operation of the entire alarm display system, thereby making it possible to check the reliability of any location within the plant 1.

Although the above example uses an LED display, it goes without saying that a CRT display, a plasma display, etc. can be used as the display to obtain the effects of the above-mentioned survey. Furthermore, the frequency of abnormality occurrence may be displayed digitally instead of by color.

[Effects of the Invention] As described above, according to the present invention, each time an abnormality in a plant is detected, its content and occurrence date and time are stored as historical information, and the frequency of occurrence of the abnormality is calculated based on past historical information. Since the above-mentioned fM degree is displayed at the same time as the type of alarm is calculated, it becomes possible to take appropriate measures according to the reliability of the area during restoration work of the abnormal area. Furthermore, in addition to testing the display section through test operations, it is also possible to know the frequency of abnormalities occurring in the past at locations within the plant.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a single report display system according to an embodiment of the present invention, and FIG. 2 is a flowchart 1 showing its operation.
・FIG. 3 is a block diagram of a conventional alarm display system. DESCRIPTION OF SYMBOLS 1... Plant, 2... Arithmetic control device, 3... Annunciator output device, 4... Illuminated alarm display panel, 5
...MOS 1-switch, 6...storage device, 7...
LED fault display panel. (7317) Agent: Patent Attorney Noriyuki Chika (
8105) King Hirobumi Brandt LIFj' Figure 1 Figure 2 Figure 3

Claims (1)

[Claims] an abnormality detection means for detecting an abnormality occurring in the plant;
a history information storage means for storing the detected abnormality content and the date and time of occurrence; a calculation means for calculating the frequency of occurrence of the detected abnormality based on the stored history information; What is claimed is: 1. An alarm display system comprising: an alarm display means for displaying; and an operation means for causing the calculation means to arbitrarily calculate the frequency of occurrence of various abnormalities and operating the alarm display means.