JPH03252000A - Alarm display device - Google Patents

Abstract

PURPOSE:To easily confirm the present value of a process signal being in an abnormal state and a variation state of the process signal by providing a freeze command means, and suspending temporarily updating of a display screen. CONSTITUTION:When some abnormality is generated in a plant 1 and a process signal deviates from a normal area, it is detected by an alarm deciding means 4. Subsequently, an alarm message related to a monitoring point is formed by an alarm message processing means 17, and it is displayed on a CRT display device 8 through a CRT display processing means 16. In this case, when a freeze button 20 is operated suitably, the screen display contents of the device 8 are fixed. In such a way, even when many alarms are generated continuously and the display contents of the screen of the device 8 are updated frequently, etc., the present value and a variation state of the process signal can be confirmed easily, and a necessary operation can be executed surely.

Description

Detailed Description of the Invention [Purpose of the Invention (Industrial Application Field) The present invention compares process signals input from a plant at regular intervals with limit values specified for each process signal to generate an alarm. The present invention relates to an alarm display device that makes a determination and displays an alarm on a screen display device of a process signal that is determined to be in an alarm state.

(Prior technology) In general, in large-scale industrial plants such as power plants, the plant is monitored/operated by central monitoring in a central control room or by central remote control, and when abnormalities occur in the plant. When the condition occurs, visible information or
Alarms are output using audible signals, etc. FIG. 14 shows an example of an alarm display device that outputs such an alarm.

Process signals of the plant 1 are periodically inputted by the process input means 2 and stored in the current value storage device 3 as current value data.

The alarm determination means 4 compares the current value data stored in the current value storage device 3 with the limit value stored in the limit value storage device 5 for the process signal predefined as a monitoring point, It determines whether the state of each monitoring point has changed from a normal state to an abnormal state, and whether the state has changed from an abnormal state to a normal state, and the results of the determination are notified to the alarm message processing means 6.

Note that the limit value storage device 5 stores limit values for each monitoring point, which serve as a reference for determining that the process signal is normal.

The alarm message processing means 6 forms alarm message display data for notifying a state change based on the stored contents of the current value storage device 3 and the limit value storage device 5 regarding the monitoring point notified by the alarm determination means 4. The alarm message display data is output to the CRT display processing means 7. Further, the warning message processing means 6 updates the contents of the warning message display data every time the stored contents of the current value storage bag w3 are updated.

The CRT display processing means 7 outputs the alarm message display data inputted from the alarm message processing means 6 to the CRT display device 8, whereby the status of the monitoring point of the plant 1 is displayed on the CRT display device 8. Ru.

In addition, the confirmation button 9 is used to press the CRT display 8 when the status of the monitoring point that was in an abnormal state until just before has returned to the normal state.
This is for inputting a command to indicate that the operator has confirmed the normal return message displayed on the screen.

Therefore, when the alarm determination means 4 determines that the state of the monitoring point has changed from a normal state to an abnormal state and notifies the alarm message processing means 6 to that effect, the alarm message processing means 6 The current value data and the limit value data are taken out from the current value storage device 3 and the limit value storage device 5, respectively, to form alarm message display data for indicating an abnormality at the monitoring point, and the alarm message display data is sent to the CRT display processing means. Output to 7.

Thereby, the CRT display processing means 7 converts the alarm message display data into display information for the CRT display device 8 and outputs the display information to the CRT display 8.

In this way, a message is displayed on the CRT display device 8 to warn of the monitoring point that has changed to an abnormal state. Furthermore, during a period in which the abnormal state continues, the alarm message processing means 6 updates the alarm message display data in synchronization with the data input cycle of the process input means 2, so that the alarm message displayed on the CRT display device 8 The contents change at the update cycle.

Further, when the operator who confirms this warning message appropriately performs the operation operation to eliminate the abnormality that has occurred, and the abnormal condition at the monitoring point is resolved, the alarm determination means 4 determines that the monitoring point is abnormal. It detects that the state has returned to the normal state, and notifies the alarm message processing means 6 to that effect.

As a result, the alarm message processing means 6 finishes creating the alarm message display data that has been output regarding the notified monitoring point, and the status of the monitoring point is changed to
Normal recovery message display data for displaying a normal recovery message to indicate that the normal condition has returned from the abnormal condition is formed and output to the CRT display processing means 7.

As a result, the alarm message for the monitoring point that has returned to normality disappears, and a normality return message notifying the monitoring point is displayed on the CRT display device 8.

When the operator sees this normal return message, press the confirmation button 9.
When turned on, the operation signal is input to the alarm message processing means 6.

As a result, the alarm message processing means 6 stops outputting the normal return message display data, thereby causing the CR
The normal recovery message displayed on the T display device 8 disappears.

In this way, the fact that each monitoring point has entered an abnormal state and that it has returned to a normal state from the abnormal state is displayed on the CRT display device 8.

(Problems to be Solved by the Invention) However, such conventional devices have the following disadvantages.

That is, the value of the process signal at the monitoring point displayed in the alarm message is updated at the input cycle of the process input means 2.

Generally, this update cycle is a short time of less than one second, which causes the inconvenience that it is difficult for an operator to confirm the numerical value.

Furthermore, it is difficult to check the status of change by simply looking at the current value of the process signal, resulting in the inconvenience of a heavy burden on the operator.

The present invention has been made in view of the above circumstances, and provides an alarm display device that allows easy confirmation of the current value of a process signal that is in an abnormal state and also allows easy confirmation of the changing state of the process signal. The purpose is to

[Configuration of the Invention (Means for Solving the Problems) The present invention provides a history data storage means for storing process signals for a predetermined number of inputs as history data, and a system for storing history data in the history data storage means. A history data storage means, a screen instruction means for inputting arbitrary coordinates of the screen display device, a freeze command means for inputting a command to temporarily fix the display screen of the screen display device, and an alarm display. a curve for extracting historical data of the matching item from the historical data storage means and displaying changes in the historical data when the coordinates input by the screen instruction means match the display coordinates of the alarm display item; Curve data creation means for forming data and updating the contents of the curve data in synchronization with updating of historical data;
The curve data created by this curve data creation means is displayed on a display window formed in a predetermined area of the display screen of the screen display device, and when a command signal is input from the freeze command means, the display contents of the screen display device are displayed. It is equipped with a display processing means that does not update for a predetermined period.

(Function) Therefore, by inputting an operation to the freeze command means, updating of the display screen can be temporarily stopped, so that the current value of the process signal displayed as an alarm can be checked. In addition, when an alarm item displayed on the screen display device is specified using the screen instruction means, a display window is opened on the screen, and the history of the process signal of the alarm item is displayed as a curve on the display window. You can easily check the status.

(Embodiments) Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

FIG. 1 shows an alarm display device according to an embodiment of the present invention. In this figure, the same parts and corresponding parts as in FIG. 14 are given the same reference numerals.

The historical data updating means 11 inputs the current value data stored in the current value storage device 3 and forms historical data for each monitoring point.The historical data is stored in the historical data storage device 12. is memorized.

A touch screen device 1 is provided on the display screen of the CRT display device 8, which allows arbitrary coordinates on the screen to be input by touch.
3 is attached, and the touch coordinate signal of this touch screen device 13 is output to the coordinate input means 14.

The coordinate input means 14 determines the touched coordinates based on the touch coordinate signal input from the touch screen device 3, and the coordinate information obtained as a result of the determination is sent to the monitoring point detection means 15 and , is added to the CRT display processing means 16.

Here, an example of a warning message display screen displayed on the CRT display device 8 is shown in FIG. 2(a).

This alarm message display screen includes alarm display lines Ll, L2, . . . . are arranged in the order in which the alarms occurred, and each alarm display line Ll
, L2. ..., as shown in Fig. 3(a), displays the number display sRI that displays the monitoring point number set for the monitoring point that has entered the alarm state, and the abbreviation set for the monitoring point. Abbreviation display 111R2, current value display 111R3 that displays the current value of the process signal of the monitoring point, limit value display column R4 that displays the limit value set for the process signal of the monitoring point, and the size of the current value and limit value. Consists of 411R5 on which a symbol indicating the relationship is displayed.

Also, alarm display lines Ll and L on the alarm message display screen
2. ..., a display window is opened in the lower right area of the screen as shown in FIG. 2(b), and the selected alarm display lines Ll, L2, . . . , a graph display window GW that displays a graph showing changes in the process signal of the monitoring points displayed in , and the selected alarm display line Ll, L2 . . . . , and a button Bid for inputting a command to erase the display window SW are displayed.

graph display! I! ! , GIj, as shown in FIG. 4, is obtained by taking the sampling timing of the process signal for each display dot in the X direction of the CRT display 8 and taking the value of the historical data in the Y direction.

Further, in this case, since the display dots are plotted at the resolution of the CRT display device 8, it appears to the operator that the display dots are connected to form the song IIACv.

Further, a straight line LR indicating the limit value determined as a warning is displayed in the same display area, so that the difference between the current value and the limit value can be easily recognized.

Furthermore, when the alarm state returns to the normal state, the content of the alarm message is changed to a normal return message as shown in FIG. 4(b). This normal return message has a format in which limit value displays 11R5 and sR6 are removed from the alarm message.

When the alarm message processing means 17 is notified of a monitoring point in an alarm state by the alarm determination means 4, it forms display information for displaying the alarm message of the monitoring point, and stores the information in the monitoring point display information storage device 111g. to be memorized. Further, when a monitoring point that has returned to a normal state from an alarm state is notified by the alarm determination means 4, display information for displaying a normal return message is formed and stored in the monitoring point display information storage device 18. Also.

The alarm message processing means 17 sends those alarm messages and normality recovery messages to the CRT display processing means 1.
Output to 6.

The monitoring point detection means 15 examines the coordinate information input from the coordinate input means 14, and detects the coordinate information input from the coordinate input means 14, and determines whether the coordinate information is in the alarm display lines Ll, L2°, etc.
・Check whether the button corresponds to , or the button BW in the display window SW. And the alarm display line Ll
, L2. ..., if it is determined that has been touched,
The alarm display lines LL, L2. . . . The monitoring point number and limit value data corresponding to the monitoring point display information storage device 18
At the same time, the curve display data is outputted to the curve display data creation means 19, and the content of the curve display presence/absence information corresponding to the monitoring point is set to the curve display presence state.

Further, when the monitoring point detection means 15 determines that the button BW is touched, and the alarm message processing means 1
When a display window deletion request is issued from 7, window deletion request information for requesting deletion of the display window side is generated and outputted to the curve display data creation means 19.

When the monitoring point number and limit value data are inputted from the monitoring point detection means 15, the curve display data creation means 19 retrieves the history data of the monitoring point from the history data storage device 12 and creates a curve for displaying the above-mentioned graph. In addition to forming display data, linear display data of the above-mentioned straight line LR corresponding to the limit value data is also formed, and display data that is a combination of the curve display data and the straight line display data is output to the CRT display processing section 16. Further, when window erasure request information is input from the monitoring point detection means 15, the window erasure request is output to the CRT display processing means 16.

Further, at this time, the curve display data creation means 19 determines the scale of the graph to be displayed as follows.

In other words, in order to be able to display both the normal range and the alarm range of the monitoring point centering on the input limit value data, if the limit value data is the upper limit value, (of the input range during the limit chain) 25'' (1 value) is set as the display scale, and when the limit value data is the lower limit value, (25% value of the input range in the limit chain) is set as the display scale.

Here, the "input range" refers to the maximum allowable range of the process signal at that monitoring point.

The CR1 display processing means 16 is the alarm message processing means 1.
The alarm message and normality recovery message input from 7 are displayed on the screen of the CRT display device 8, and the coordinate information input from the coordinate input means 14 is displayed on the alarm display line Ll,
L2. . do.

Further, when the freeze button 20 is turned on, the CR1 display processing means 16 displays the alarm display lines Ll, L2. The contents displayed on the screen of the CRT display device 8 are not changed until the coordinate information of . . . is input.

FIG. 5 illustrates the storage contents of the current value storage device 3.

In the current value storage device 3, input values of process signals for each monitoring point number are stored in the order of the monitoring point number.

FIG. 6 illustrates the storage contents of the limit value storage device 5. As shown in FIG.

The limit value storage device 5 stores sets of upper limit values and lower limit values for the process signals of each monitoring point number.

FIG. 7 illustrates the storage contents of the monitoring point display information storage device 18.

The monitoring point display information storage device 18 includes alarm display lines Ll, L2, . ..., the process signal to be displayed is displayed, the intermediate viewpoint number information, whether the monitoring point is displayed in a graph, the presence/absence of curve display information, and the determination that an alarm state has occurred. Information containing a set of limit value information is stored that includes the limit value used as the standard.

FIG. 8(a) illustrates the storage contents of the history data storage device 12. However, the figure shows one monitoring point.

The historical data storage device 12 has j historical data areas AR for storing process signals for each monitoring point.
A current value pointer CP for storing I to ARj and historical data areas ARI to ARj storing the latest process signals are stored. In addition, the historical data area ARI~
ARj is used as a cyclic buffer.

For example, as shown in FIG.
In the state where the latest process signal P(n) is stored in the current value pointer CP, information indicating the history data area AR2 is stored in the current value pointer CP. From this state, when the next input cycle comes, the latest process signal P(n+1) is stored in the history data area AR3 next to the history data area AR2 indicated by the current value pointer CP, and at the same time, the current value pointer CP stores: Information regarding history data area AR3 is stored.

FIG. 9 shows a processing example of the history data updating means 11 that performs such storage processing.

First, the current value data for one monitoring point is extracted from the current value data M3 (process 101), and the current value data is transferred to the current value pointer CP of the historical data storage device 12.
Process 102) to store the value of the current value pointer CP in the history data area ARI to AI'lj next to the history data area AR) to ARj indicated by 102), to the history data area in which the current value data is stored. AR1~AR
j (process 103).

Then, it is determined whether the processing for all monitoring points has been completed (judgment 104), and when the result of judgment 104 is NO, the process returns to processing 101 and repeats the same processing for the next monitoring point. .

Further, when the result of the judgment 104 is YES, the process waits until the next sampling timing (process 105), and updates the history data at the next sampling timing.

FIG. 10 shows a processing example of the process input means 2, the alarm judgment means 4, and the alarm message processing means 17.

When the sampling timing of the process signal comes, the process signal of one monitoring point is input from the plant 1, and the process signal is converted into the corresponding engineering value. Process 201
), and the current value storage device 3 stores the engineering value as current value data.
(process 202).

Next, a process 203) of retrieving the limit value data of the monitoring point of interest from the limit value storage device 5;
The current value data stored in the current value data and the limit value data are compared to determine whether the current value data is normal or deviates from the normal range (determination 204).

If it is determined to be normal in judgment 204, it is checked whether or not it was judged as deviant in the previous judgment (judgment 205);
Further, when it is determined as a deviation in the judgment 204, it is checked whether or not it was determined as normal in the previous judgment (judgment 206).

When the result of judgment 205 is YES, the content of the monitoring point display information is changed to one that does not include limit value information (i.e.,
normal information) (processing 207), and alarm display lines Ll, L2 .・
..., the display information that displays the normal recovery message,
It is output to the CRT display processing means 16 (process 208).

When the result of the judgment 206 is YES, the alarm information is stored in the empty area of the monitoring point display information storage device M18 (step 209), and the alarm display lines Ll, L2 . ..., outputs display information for displaying an alarm message to the CRT display processing means 16 (processing 21
0).

After execution of process 208 and process 210 is completed, and when the results of judgment 205 and judgment 206 are No, check whether a warning message or a normal return message is being displayed for the monitoring point of interest at that time. (Judgement 211), When the result of Decision 21 is YES, the content of the current value data in the message is updated to the content stored in the current value data M3 at that time (processing 212). Furthermore, when the result of determination 211 is NO, processing 212 is not executed.

Next, it is checked whether the confirmation button 9 has been operated and the operator has given a command to confirm normal return (decision 213), and determination 21
When the result of step 3 is YES, the normality recovery message output to the CRT display processing means 16 is erased (process 214). Then, it is checked whether the curve display presence/absence information is set to curve display presence (judgment 215), and when the result of judgment 215 is YES, a display window deletion request is commanded to the monitoring point detection means 15 (processing 216).

Further, when the result of judgment 215 is No, processing 2
16 is not executed, and when the result of determination 213 is No, processes 214 to 216 are not executed.

Then, it is checked whether the processing for all monitoring points has been completed (judgment 217), and when the result of judgment 217 is NO, the process returns to processing 201 and the same processing is executed for the next monitoring point.

When the result of determination 217 is YES, the process waits until the next sampling timing (process 218), and returns to process 201.

FIG. 11 shows coordinate input means 14, monitoring point detection means 15,
An example of processing by the curve display data creation means 19 is also shown.

First, it is checked whether a monitoring point has been selected, whether window deletion has been requested, or whether normal return has been confirmed (judgments 301, 302, and 303).

When the result of the judgment 301 is YES, the alarm display line is determined from the input coordinates (process 304), and the monitoring point of the alarm display line is determined by referring to the stored contents of the monitoring point display information storage device 18. (Process 305). At this time, the curve display presence/absence information of the monitoring point display information is set to "display" in the hail data.

Next, the historical data of that monitoring point is stored in the historical data storage device 1.
At the same time, the limit value data is extracted from the limit value data W5 (306), and curve display data and scale display data are formed (processes 307, 308).
). Then, these display data are output to the CRT display processing means 16 (process 309).

Next, the current value data is retrieved from the current value storage device 3 (process 310), curve display update data for updating the curve display data is formed (process 311), and the curve display update data is output to the CRT display processing means 16. Processing 312
), the process waits for a time until the next curve display update timing (process 313), and returns to judgment 301.

Further, when the result of judgment 303 is NO, processing 3
10, and the subsequent processing is executed.

Further, when the result of judgment 302 is No, and when the result of judgment 303 is No, a window deletion request is output to the CRT display processing means 16 (process 314).
.

With the above configuration, when some abnormality occurs in the plant 1 and the process signal deviates from the normal range, the alarm judgment means 4 detects this condition, and the alarm message processing means 17 issues an alarm message for that monitoring point. is formed and output to the CRT display processing means 16,
It is displayed on the T display device 8.

Further, when a plurality of alarms occur, the alarm messages are displayed on the CRT display device 8 in the order in which they occur.

Here, the operator displays alarm display lines L1, L2, . . . , a display window Sv is opened on the CRT display device 8, and the touched alarm display lines Ll, L2, . A graph showing the history of the process signal of the monitoring point displayed in ... is displayed.

When the operator confirms this display and performs a driving operation to deal with the generated alarm, and the state of the monitoring point returns to normal, the same alarm display line Ll, L2 that was displaying the alarm message until just before ．． ..., a normal recovery message is displayed.

When the operator confirms this normality return message and turns on the confirmation button 9, the normality recovery message is erased, the display window sit is closed, and the graph display is terminated.

In this way, the alarm message is displayed and the history of the process signal at the monitoring point is displayed graphically, allowing the operator to easily recognize the changes in the process signal and perform appropriate operation operations. I can do it.

Further, when the operator operates the freeze button 20 appropriately, a certain period of time elapses or the operator operates the alarm display lines Ll, L2. ... until you touch the CRT.
The contents displayed on the screen of the display device 8 are fixed.

Therefore, if a large number of alarms occur in succession, CR
Even if the display content on the screen of the T display device 8 is frequently updated, the display content is temporarily fixed, so that the operator can reliably perform the necessary operations.

Incidentally, in the above embodiment, a graph of one monitoring point is displayed on the display window SW, but it is also possible to display a plurality of graphs.

In that case, for example, as shown in FIG. 12 (aL(b)), if you touch the alarm display lines Ll, L2, L3, and L4 in sequence, the history of the process signal of the monitoring point displayed in that order will be displayed. It is best to number the touch order and display it as a graph.

Further, in the above-described embodiment, the graph display is performed by the operator's touch operation, but when an important monitoring point becomes in an alarm state, the graph display is automatically displayed, which further improves usability. FIG. 13 shows such an embodiment. In this figure, the same or corresponding parts as in FIG. 1 are given the same reference numerals.

Importance information memory bag! 21 stores importance information set for each monitoring point.

The automatic display determination means 22 is the alarm message processing means 17.
When a monitoring point that is in an alarm state is notified, the importance of that monitoring point is retrieved from the importance information storage device 21,
If the degree of importance is equal to or higher than a predetermined value, a curve display request is notified to the curve display data creation means 19.

Thereby, the curve display data creation means 19 creates curve display data of the notified monitoring point and outputs it to the CRT display processing means 16.

As a result, even if there is no touch operation by the operator, the history of process signals at that monitoring point can be displayed on the CRT.
Display on display device 8! I! , S is displayed.

Incidentally, in the above-described embodiment, a touch screen device is used as the screen instruction means for inputting arbitrary coordinates on the display screen of the CRT display device, but other devices,
For example, a mouse device, a light pen device, a trackball device, etc. can also be used.

[Effects of the Invention] As explained above, according to the present invention, the history data of each process signal is stored, and the history of the process signal of the monitoring point where an alarm is displayed according to a request from an operator can be displayed on the same screen. Since the information is displayed in a display window that opens inside, you can easily check the change status. Also,
By operating and inputting the freeze command means, updating of the display screen can be temporarily stopped, so that the present value of the process signal displayed as an alarm can be easily confirmed.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an alarm display device according to an embodiment of the present invention, FIG. 2(a) is a schematic diagram showing an example of an alarm screen, and FIG. 2(b) is a graph displayed in a display window. 3(a) is a schematic diagram showing an example of a warning message; FIG. 3(b) is a schematic diagram showing an example of a normal return message; FIG. 4 is a schematic diagram showing an example of a graph display. figure,
FIG. 5 is a schematic diagram showing an example of the storage content of the current value storage device, FIG. 6 is a schematic diagram showing an example of the storage content of the limit value storage device, and FIG. 7 is a schematic diagram showing an example of the storage content of the monitoring point storage device. FIG. 8(a) is a schematic diagram showing an example of the storage contents regarding one monitoring point of the historical data storage device; FIG.
(C) is a schematic diagram showing an example of changes in the storage contents of the history data storage device, FIG. 9 is a flowchart showing an example of processing by the history data updating means, and FIG. 10 is a process input means, alarm judgment means, and alarm message processing. 11 is a flowchart that collectively shows processing examples of the means, FIG. 11 is a flowchart that collectively shows processing examples of the coordinate input means, monitoring point detection means, and curve display data creation means; FIGS. 12(a) and (b)
13 is a schematic diagram showing another example of the alarm screen, FIG. 13 is a block diagram showing an alarm display device according to another embodiment of the present invention, and FIG. 14 is a block diagram showing a conventional example of the alarm display device. 2... Process input means, 3... Current value storage device,
4... Alarm determination means, 5... Limit value storage device, 11
...History data updating means, 12...Historical data storage device, 13...Touch screen device, 14...Coordinate input means, 15...Monitoring point detection means, 16...C
RT display processing means, 17... Alarm message processing means, 18... Monitoring point display information storage device, 19... Curve display data creation means, 20... Freeze button.

Claims (1)

[Claims] In an alarm display device that compares process signals inputted from a plant at regular intervals with limit values specified for each process signal to determine an alarm, and displays the process signal determined to be in an alarm state as an alarm on a screen display device. , a history data storage means for storing process signals for a predetermined number of inputs as history data; a history data storage means for storing history data in the history data storage means; and an operation input of arbitrary coordinates of a screen display device. a freeze command means for inputting a command to temporarily fix the display screen of the screen display device; and a freeze command means for inputting a command to temporarily fix the display screen of the screen display device; and a freeze command means for inputting a command to temporarily fix the display screen of the screen display device; When the coordinates match, the history data of the matched item is retrieved from the history data storage means to form curve data for displaying changes in the history data, and the contents of the curve data are synchronized with the update of the history data. curve data creation means for updating the curve data creation means; and displaying the curve data created by the curve data creation means on a display window formed in a predetermined area of the display screen of the screen display device, while receiving a command signal from the freeze command means. 1. An alarm display device comprising display processing means that does not update display content on a screen display device for a predetermined period when an alarm occurs.