JPS63179216A - Trend display device - Google Patents

Abstract

PURPOSE:To collect necessary data without omission even when plural alarms are generated at the same time by registering all items in a group relevant to an alarm point as trend items if there is a plant input which becomes the alarm point. CONSTITUTION:A limit value judgement part 2 outputs an alarm signal with which an input point can be discriminated every time there is the deviating input point. An alarm item automatic registering means 9 outputs a registration signal h1 when inputting the signal item (b) to register the alarm point in a trend item storage device 7. A relative input item automatic registering means 10 selects a relative input point group from a relative input item 8 and registers all input points which belong to the group in the storage device 7. The device 7 collects and stores data at a constant period as to all trend items. A trend item automatic display means 13 selects a display scale corresponding to the alarm point and relative input items in a data base 14 and outputs it to a display device 5 as trend display data (j) together with collected data (g) inputted from the device 7. Thus, the alarm point and data on the relative input point are monitored at the same timing.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Application) The present invention relates to a trend display device for monitoring trends in a plant.

(Prior art) Trend monitoring of plant input alarm points using a conventional trend display device sets a plant input alarm area for each plant input, and records alarm tracking information within the alarm area using WR5 (IJorse) or BTR (
This was done by outputting character messages such as Bet, t, er). In addition, the trend display function as a trend display device collects plant input data related to trend items that are registered by operators through interactive operations, and is collected when there is a display request from an operator. The idea was to display plant data related to trend items.

The alarm procedure of this conventional trend display device is shown in Figure 2(a).
Shown below. The input point scanning device 1 detects a plant input point (not shown) (
The input value from the input point (hereinafter referred to as input point) is converted into a digital plant input signal a and taken in.

Next, the limit value determining unit 2 determines whether the plant input signal a deviates from the limit value, and if there is a deviating plant input (hereinafter referred to as an alarm point).

An alarm signal will be output, and if the plant input signal that once exceeded the limit value returns to normal.

A normal return signal C is output. When the alarm signal d is input, the trend monitoring and determining means 3 determines whether the plant input is in the direction of deterioration or normalization after deviating from the limit value, and generates a trend information signal d for identifying these. Output. When the alarm point display means 4 receives the trend information signal d, it outputs the 1 display signal e and displays on the 1 display device 5 a character message including the alarm points and the trend information. This allows the operator to know that there is a warning point.

Next, when an operator learns that there is an alarm point and performs a cause analysis for the alarm point, he or she should check the trend of the alarm point and the extraction point in order to obtain trend information of the alarm point and extraction points related to the alarm point. Perform display. The trend display procedure at this time is to output a dialogue request signal f from the dialogue device 6 and register the alarm points and related input points as trend items in the trend item storage device 7, as shown in FIG. The trend item storage device 7 collects data on plant input values at input points related to registered trend items and stores them. When displaying this collected data on the display device 5,
A display request is made again by the dialog device 6, and a dialog request signal f is output to the trend item storage bag [7]. When the trend item storage device 7 receives a display request, it displays the collected data on the display device 5, and displays newly collected data until the display request is canceled.

In this way, trends in alarm points and input points related to the alarm points are monitored, and causes of occurrence of the alarm points are analyzed.

In addition, when the plant is restored after analyzing the cause, the same figure (a)
A normal return signal C is output from the limit value determination unit 2 shown in FIG.

When the alarm point display means 4 receives this normal return signal C, it displays on the display device 5 that the alarm point has returned to normal by means of a character message.

(Problems to be Solved by the Invention) However, in order to analyze the cause of an alarm point, information such as the state transition or residence time of all input points related to the alarm point is required at the same timing.

However, in conventional trend display devices, trend items are registered in an interactive manner each time after a character message corresponding to an alarm point is output.

Data must be collected for the related input points that you want to monitor, and if multiple alarms occur at the same time, it is not possible to register all the related input points as trend items, and it is difficult to collect all the data necessary for cause analysis. There was a problem that it was impossible to collect.

Therefore, the present invention makes it possible to collect all necessary data even if multiple alarms occur simultaneously.

It is an object of the present invention to provide a trend display device that allows easy cause analysis.

[Structure of the Invention] (Means for Solving Problems) The present invention groups plant input points by related items, and when there is a plant input that becomes an alarm point that exceeds a limit value, the alarm point is Register all items in related groups as trend items.

It automatically collects data on trend items necessary for cause analysis, displays the collected data on a display device, and
When an alarm point that deviates from a limit value returns to normal, the items in the group related to that alarm point are automatically deleted from the registered trend items.

(Function) As a result, even if multiple alarms occur simultaneously, all trend items related to each alarm can be registered.
All necessary data can be automatically collected and displayed, making it easy to analyze the cause.

(Example) The configuration of a trend display device according to an example of the present invention is described in a first example.
As shown in the figure. Components with the same functions as those in FIGS. 2(a) and 2(b) are given the same numbers, and in this trend display device, input values from input points are converted into digital plant input signals a.
Input point scanning device 1 for converting the plant input signal a to limit values corresponding to input points stored in a database (to be described later) and a limit value judgment unit 2) for outputting an alarm signal or a normal return signal C. Display device for displaying trends 5. It is similar to FIG. 2 in that it includes a trend item storage device 7 for collecting and storing input point data regarding registered trend items.

The related input items 8 are all trend items necessary for cause analysis when an alarm occurs, and are grouped in advance according to related items. When the alarm item automatic registration means 9 receives the alarm signal from the limit value determination section 2, it outputs a registration signal h1 and registers the alarm point as a trend item in the trend item storage bag 'a7. Further, when the related input item automatic registration means 10 receives the alarm signal h from the limit value judgment unit 2, it judges which group the alarm point belongs to in the related input items 8, and outputs a registration signal h2. All items within the group to which the alarm point belongs are registered in the trend item storage device 7 as related trend items.

On the other hand, the alarm item automatic deletion means 11 outputs the deletion signal 11 and automatically deletes the alarm item when the alarm point that once outputs the alarm signal returns to normal and receives the normal return signal C from the limit value judgment unit 2. The trend item storage device 7 is stored by the registration means 9.
This is to delete alarm points registered as trend items from the trend items. Further, when the related input item automatic deletion means 12 receives the normal return signal C, it outputs a deletion signal 12 and stores all the input points in the group related to the alarm point deleted by the alarm item automatic deletion means 11 in the trend item storage. This item is deleted from the trend items of the device 7.

The trend item automatic display means 13 collects collected data g at regular intervals regarding the trend items registered in the trend item storage means 7 until the registration is deleted.

The trend display data j is stored and output to the display bag [5].

The database 14 is for storing information on the display scale displayed on the display device 5.

Further, the database 15 is for storing control value information for each input point determined by the limit value determining section 2.

With the above configuration, the limit value determination unit 2 scans the input point ffi!
1 for plant trend monitoring.

Suppose now that some input points deviate from the limit values. The limit value determination unit 2 outputs an alarm signal that allows identification of the input point every time there is a deviation from the input point.

The alarm item automatic registration means 9 and the related input item automatic registration means 10 input this, and the former outputs a registration signal h1 every time an alarm signal is input, and stores the deviated alarm point as a trend item. Fukuro [Register in 7. The latter selects a related input point group from the related input items 8, sets all input points belonging to the group as trend items, and outputs a registration signal h2 every time an alarm signal is input, creating a trend item memory bag! ! ! Register on 7. The trend item storage device 7 collects data on all registered trend items at regular intervals from the time of registration, and stores the data.

When the trend item automatic display means 13 generates an alarm,
A display scale for the alarm point and related input items is selected from the database 14 and outputted to the display device 5 as trend display data j together with the collected data g input from the trend item storage device 7.

The display method at this time is 1 if there are few related items.
It can be displayed on the screen, but when there are many related items, the screen is displayed by page processing. Furthermore, similar processing is performed when multiple alarm points occur.

Thereby, the data of the alarm point and the related input point can be monitored at the same timing, and the operator can discover the cause of the alarm at an early stage.

Thereafter, when the operator takes appropriate action, the plant returns to normal. When the plant returns to normal, the limit value determination section 2 outputs a normal return signal C regarding the alarm point at which the alarm signal S was once output. When the normal return signal C is output, the alarm item automatic deletion means 11 and the related input item automatic deletion means 12 input this and output deletion signals ir and i2, respectively, to delete the alarm registered in the trend item storage device 7. The point and each input point of the group related to it are sequentially deleted from the trend item. Moreover, the trend item automatic display means 13 deletes them from the display screen displayed on the display device 5.

As described above, according to this embodiment, when a plurality of alarm points occur, it is possible to collect information from all input points regarding each alarm point without omission, and the collected data is automatically displayed. Therefore, the trend of each input point information in one report can be monitored at a glance, and cause analysis and processing thereof can be performed quickly.

All data while an alarm is occurring is stored in the trend item storage device [17], so the operator can obtain information on alarm points and related input points at any time by requesting display. .

In addition, in this embodiment, the limit value of the limit value determination unit 2, that is, the alarm setting value, is set to one stage, but the alarm setting value is set to two stages, and the same process is performed in the pre-alarm state, so that the alarm is activated. You can also monitor the process.

[Effects of the Invention] As described above, according to the present invention, when an alarm occurs in a plant,
Input point information related to alarm points necessary for cause analysis can be collected without omission, and can be automatically displayed on a display device, thereby providing a trend display device that facilitates cause analysis of plant abnormalities.

[Brief explanation of the drawing]

FIG. 1 is an explanatory diagram of a trend display procedure of a trend display device according to an embodiment of the present invention, FIG. 2 (a) is an explanatory diagram of an alarm procedure of a conventional trend display device, and FIG. It is an explanatory diagram of a trend display procedure. 1... Input point scanning device, 2... Limit value determination unit. 3...Trend monitoring and judgment means, 4...Alarm point display means. 5...Display device, 6...Interaction device, 7...Trend item storage device, 8...Related input items, 9...Alarm item automatic registration means, 10...Related input item automatic registration Means, 11... Alarm item automatic deletion means, 12... Related input item automatic deletion means, 13... Trend item automatic display means, 14, 15... Database. (7317) Agent: Patent Attorney Noriyuki Chika (
8105) King Hongbun Figure 1

Claims (2)

[Claims] (1) A limit value judgment unit that monitors process quantities input from detectors placed in each part of the plant and determines deviations from the limit values at each plant input point, and a limit value judgment unit that monitors process quantities input from detectors placed in each part of the plant, and determines deviations from the limit values based on the judgment results. Alarm item automatic registration means for registering a plant input point as a trend item; related input item automatic registration means for registering other plant input points related to the plant input point that deviated from the limit value as a trend item; and these registration means. A trend item comprising: a trend item storage means for collecting and storing data of plant input points registered as a trend item by a trend item; and a trend item automatic display means for displaying data stored by the storage means. Display device. (2) Claim 1 provides that automatic deletion means is provided for deleting the plant input point registered by the registration means from the trend items when the plant input point that deviated from the limit value returns to normal. Features a trend display device.