JPH0476697A - Representative alarm device - Google Patents

Abstract

PURPOSE:To judges the contents of an alarm in stages by converting plural simultaneously generated alarm factors into constants having weights corresponding to respective factors and comparing the value obtained by integrating the constants with a value previously set in a setter. CONSTITUTION:An alarm factor is converted into a constant having a weight by a constant generator 1. The alarm factor is connected to an adding computing element 2 and outputted to an analog alarm device 3-1 with a setter. The alarm device 3-1 compares the input from the computing element 2 with the value previously set in the setter, and when the input value is more than the set point, outputs and displays an alarm signal to/on a representative alarm display device 4-1. Thereby, when plural alarm factors are simultaneously formed, respective alarms can be distinguished, so that even when individual alarm factors are slight alarms, plural simultaneously generated can be informed to the operator as an important failure alarm indicating a high alarm division and operation with high safeness can be attained.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a representative alarm system for a plant that judges alarms step by step and displays them representatively.

[Conventional technology]

In conventional alarm devices, classification of major failures and minor failures is defined in advance for each alarm factor, and failures are displayed.

When an alarm occurs, an operator takes appropriate measures for the plant depending on the content of the alarm factor.

The above-mentioned conventional technology has the disadvantage that a plurality of minor failures occur at the same time and an alarm corresponding to a serious failure cannot be displayed even if there is a request to display it as a serious failure.

[Problem to be solved by the invention]

In the above conventional technology, when multiple minor failures occur at the same time, even if there is a request to display them as major failures because they are equivalent to major failures, they are only displayed as minor failures and cannot be displayed as major failures. Can not.

In recent years, the number of alarm factors has increased due to the reduction in the number of operators due to labor-saving measures and the increase in the number of control points in plants due to the advancement of control methods, which has increased the burden on operators.
There is a risk that an error in judgment may occur in the response actions taken by the operator when an alarm occurs.

An object of the present invention is to display the serious failure as equivalent to a serious failure when a plurality of minor failures occur at the same time, and to appropriately take countermeasures in the event of a plant abnormality.

[Means to solve the problem]

In order to achieve the above object, a representative alarm device of the present invention includes:
Convert multiple alarm factors that occur at the same time into constants with weights corresponding to each alarm factor, and compare the integrated value of the constants with the value of the setting device, which is a rough setting, to adjust the alarm contents step by step. It has the function of making judgments.

[Effect]

By using the representative alarm device configured as described above, multiple alarm factors that occur simultaneously are converted into constants with weights corresponding to each alarm factor, and the constants are integrated,
By comparing the integrated value and the preset value on the setting device, the content of the alarm can be determined step by step, and the alarm can be classified.

Further, even if the individual alarm factors are minor alarms, if multiple alarms occur at the same time, the operator can be notified as an alarm of a high alarm category.

〔Example〕

An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a representative alarm device according to the present invention.

When a plurality of alarm factors simultaneously generate an alarm, each alarm factor is converted into a weighted constant by the constant generator 1. The alarm factor converted into a weighted constant by the constant generator 1 is connected to the addition calculator 2, and after the addition calculation, is output to the analog alarm device with setting device 3-1. The analog alarm device with setting device 3-1 compares the input from the addition calculator 2 with the preset value of the setting device, and if the input value is equal to or higher than the set value, an alarm signal is sent to the representative alarm display 41. Output to and display.

If you have multiple alarm categories and want to display representative alarms in stages, use the required number of analog alarms with setting devices from 3-2 to 3-m and representative alarm indicators from 4-2 to 4-m. Configure an additional circuit to display alarms in stages.

Generally, the number of alarm factors required to operate one plant is about 20 to 1,000, and the alarm levels need to be divided into 2 to 5 stages. From the above, the m value of the alarm factor n in FIG. 1 is 20 to 1000, and the analog alarm device with setting device 3-m.

The m value of the representative alarm indicator 4-m is 2 to 5.

Figures 2 and 3 are written on the assumption that the number of alarm factors is 7 and the number of alarm classifications is 2 stages.

Category 2 has a greater impact on the plant than Category 1. FIG. 2 is a diagram showing the values of constants that give weight to each alarm factor that occurs. The value of the constant is determined depending on the degree of influence on plant operation when an alarm is generated due to an alarm factor. Figure 3 shows the sum of constants with weights corresponding to the alarm factors that occurred, and
It is a time chart showing the operation of each alarm factor that has occurred.

Hereinafter, the operation will be explained in case 1 according to FIG. Cases 2 and 3 will be explained.

Case 1 is a combination of a minor alarm factor and an alarm factor corresponding to a rather serious failure based on the values of the constants serving as the weights shown in FIG.

When alarm factor 1 turns ON, a constant corresponding to alarm factor 1 is integrated, and the integrated value becomes 1. Next, alarm factor 2, alarm factor 3
．． When alarm factor 5 turns ON sequentially, the integrated value is also integrated sequentially,
When the iF alarm factor 5 is turned ON, the setting value of category 1 becomes 5 or higher, and it is output and displayed as a category 1 alarm.

Case 2 is a case where an alarm is generated due to a minor alarm factor, and alarm factor 1. Alarm factor 2. Even if alarm factor 3 and alarm factor 4 are turned ON sequentially, the integrated value is 4, which is smaller than the category 1 set value 5, so no representative alarm is output.

Case 3 is a case where only one alarm factor corresponding to a serious failure occurs, and when alarm factor 7 is ONL, the integrated value is 1.
0, the category 1 setting value is 52, and the category 2 setting value is 10 or more, so a category 1 alarm 9 category 2 alarm is output and displayed.

According to this embodiment, even if a plurality of alarms are caused by a minor alarm factor, if a plurality of alarms occur simultaneously, the operator can be notified as a serious fault alarm indicating an alarm of a high alarm category.

〔Effect of the invention〕

According to the present invention, when multiple alarm factors are established at the same time, the constants corresponding to the alarm factors are integrated and the alarms can be classified based on the preset alarm setting value of the setting device. Even if multiple alarms are minor, if a plurality of alarms are established at the same time, the operator can be notified as a serious fault alarm indicating an alarm of a high alarm classification, so there is an effect that a representative alarm device capable of highly safe operation can be provided.

[Brief explanation of drawings]

Fig. 1 is a block diagram of a typical alarm device showing an embodiment of the present invention, Fig. 2 is a diagram showing the values of constants that give weight to each alarm factor of the generated alarm, and Fig. 3 is a diagram showing the values of constants that give weight to each alarm factor of the generated alarm. A constant ii with a weight corresponding to the alarm factor! , , is a time chart showing an integrated figure and the operation of each alarm factor. 1...constant generator, 2...addition calculator, 3-1~3m
...Analog alarm with setting device, 4-1 to 4-m...Representative alarm display. Kariichi 1-

Claims (1)

[Claims] 1. When there are multiple alarm factors, a constant weighted for each alarm factor, one or more setting devices for classifying the alarm content, and when the alarm factors are satisfied at the same time, the alarm factor 1. A representative alarm device characterized by having an arithmetic unit for integrating constants for each.