JPH01309200A - Process supervising device - Google Patents

Abstract

PURPOSE:To improve plant supervising function by displaying data together with past time sequence data stored in advance simultaneously with alarm generation. CONSTITUTION:When the data goes to be an alarm, the data to be periodically stored are extracted from a trend data storage file 8 by a trend storage data display means 1. A scale to correspond to an input point identifying number, which goes to be the alarm, is extracted from a trend display information file 6, for which the scale to be needed for trend display is given in advance in each input point identifying number, and displayed to a CRT 9 as the data before the alarm generation. Even for the data after the alarm generation, each time the contents of a process data file 5 are updated, the data are extracted by the same trend storage data display means 1 and continuously displayed to the CRT 9. Thus, the fluctuation and trend of the data can be momentarily obtained for a driver and plant supervision can be improved.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a process monitoring device with a trend display function.

(Prior art) Generally, process display devices are used to notify operators of plant status in order to operate plants safely and stably. One of the important functions is the trend display function that displays trends in

FIG. 5 shows an example of a conventional process display device having a trend display function.

As shown in the figure, the conventional trend display function periodically inputs process data from a process input/output device 1, and displays trends using a process data input means 2 that updates the contents of a process data file 5, and an input device such as a keyboard 10. When there is a registration request 14, a trend registration means 11 inputs an input point identification number, a display graph number, and a display scale input from the keyboard 10 and stores them in the trend registration data file 12, and a trend display request is made from the keyboard 10. 15, the trend data display means 13 displays the data on the CRT 9 each time the contents of the process data file 5 are updated.

(Problem to be Solved by the Invention) In a conventional process monitoring device having a trend display function, as described above, items to be displayed as trends must be registered in advance. Therefore, if an alarm occurs, the trend cannot be displayed unless the point is registered, and even if it is registered, the trend processing starts after the trend display request is made, so the process before the trend display request is It was not possible to determine the fluctuations and trends in the data.

For this reason, even if an operator requests trend display when an alarm occurs, the trend item may not be registered, or even if trend display is performed, process data must be displayed on the trend screen in order to know the fluctuations and trends of the data. The operator has to wait for a certain amount of time until the alarm occurs, which delays the operator's response.Furthermore, even if the trend is displayed when an alarm occurs, it is not possible to see the change in data over time before the alarm occurs. There was a problem in that it took time to find the cause because the process that led to it was not known.

The present invention does not require registering trend items in advance.
By automatically displaying the corresponding trend screen when an alarm occurs, and simultaneously displaying the periodically saved data before the alarm, the overall trend of the input points where the alarm occurred can be instantly determined, and the plant The purpose is to provide a process monitoring device that improves monitoring functions.

[Structure of the invention]

(Means for solving the problem) In a process monitoring device that displays trend data,
Each time the contents of the process data file are updated, the data is extracted, an alarm check is performed, and if there is an alarm, the alarm detection means switches to the corresponding trend screen, and the received process data is periodically stored in the trend data storage file. A storage means for trend data to be saved, a trend display information file in which the scale required for trend display is given in advance for each input point identification number, and data corresponding to the input point identification number that caused an alarm from each file at the same time as an alarm. A trend saved data display means is provided to display the data before and after the alarm occurrence on a CRT. When an alarm occurs, the trend saved data display means extracts the data before the alarm from the trend data save file, and displays that data from the trend display information file. Extract the scale corresponding to the input point identification number, and
The system is configured so that the data after an alarm occurrence is extracted by the same trend saved data display means each time the process data file is updated, and subsequently displayed on the CRT.

(Function) Regarding the received process data, each time the contents of the process data file are updated, the data is extracted, the alarm detection means checks the alarm, and the trend data storage means saves it to the trend data storage file. .

If the data becomes an alarm, the trend saved data display means extracts the periodically saved data from the trend data save file, and the scale required for trend display is given in advance to each input point identification number. The scale corresponding to the input point identification number that caused the alarm is extracted from the trend display information file and displayed on the CRT as data before the alarm occurred. In addition, data after an alarm occurs is extracted using the same trend storage data display means every time the contents of the process data file are updated, and the data is continuously displayed on the CRT, providing operators with data fluctuations and trends instantly. can improve plant monitoring.

(Example) A process monitoring device according to the present invention will be explained using an example shown in FIG.

In FIG. 1, the same parts as in FIG. 5 are designated by the same reference numerals, and their explanation will be omitted.

The difference between Fig. 1 and the conventional Fig. 5 is that each time the contents of the process data file 5 are updated, the alarm detection means 3 extracts the data and performs an alarm check, and if there is an alarm, switches to the corresponding trend screen. , a trend data storage means 7 which periodically stores the received process data in a trend data storage file 8 by the trend data storage means 7, and a trend data storage means 7 which gives a scale necessary for trend display to each input point identification number in advance. The data corresponding to the input point identification number 21 that caused the alarm is extracted from the display information file 6, the trend data storage file 8, the trend display information file 6, and the process data file 5 when the alarm occurs, and the data before and after the alarm is generated. This is the addition of trend storage data display means 4 for displaying data on the CRT 9.

The process monitoring device extracts the received process data each time the contents of the process data file 5 are updated, checks the alarm using the alarm detection means 3, and stores the data in the trend data storage file 8. .

If the data becomes an alarm, the trend saved data display means 4 extracts the periodically saved data from the trend data save file 8, and gives the scale necessary for trend display to each input point identification number 21 in advance. The scale corresponding to the input point identification number 21 that caused the alarm is extracted from the trend display information file 6 that has been stored, and is displayed on the CRT 9 as data before the alarm occurred.

Furthermore, each time the contents of the process data file 5 are updated, data after an alarm is generated is extracted using the same trend data display means and continuously displayed on the CRT 9, allowing operators to instantly see data fluctuations and trends. can be provided to improve plant monitoring. Regarding the trend display of the CRT9, as shown in FIG. 6, the horizontal axis is divided at the center, and the left side shows data before an alarm occurs, and the left shows data after an alarm occurs.

Next, the operation of the present invention will be explained using FIGS. 2 to 8.

2 is a flowchart of the operation in the alarm detection means of FIG. 1, FIG. 3 is a flowchart of the operation of the trend data storage means 7 of FIG. 1, and FIG. 4 is a flowchart of the operation of the trend storage data display means 4 of FIG. 1. FIG. 6 is a diagram showing an example of the trend display screen according to the present invention, FIG. 7 is a diagram showing an example of the trend data storage file 8 of FIG.
The figure shows an example of the trend display information file 6 of FIG. 1.

First, the operation of the alarm detection means 3 shown in FIG.
This will be explained using figures.

Regarding the received process data, each time the contents of the process data file 5 are updated, the data is extracted (5TEPI) and an alarm check is performed (STEP 2).
), no special processing is performed if the data is normal;
In the case of an alarm, the process of the trend saved data display means 4 is performed.

(STEP 3) Next, the operation of the trend data storage means 7 shown in FIG. 1 will be explained using FIG. 3.7. Every time the contents of the process data file 5 are updated, the data is extracted (STEP 4) and saved in the trend data storage file 8 (STEP 5).The trend data storage file has each input point identification number 21 as shown in FIG. There is a trend save counter 20 for each, and the file is capable of storing (n,) pieces of trend save data. Incidentally, the trend data is saved as trend save data 22 in the location indicated by the trend save counter 20 in the trend data save file 8.

The trend storage counter 20 is a pointer indicating the address at which trend data is stored in the trend data storage file 8, and each time the trend storage data 22 is written to that location, the trend storage counter 20 is incremented (STEP 6).

After the counter is incremented, a check is made to see if the counter is greater than or equal to the maximum data storage number MAX (STEP 7), and if the condition is met, the counter is cleared (STEP 8).

The above operations are repeated and the trend data storage file 8 is used cyclically as an endless file.

Next, the operation of the trend saved data display means 4 of FIG. 1 will be explained using FIG. 4. One operation is a process performed immediately after an alarm is detected by the alarm detection means 3. If the received process data is an alarm, extract the data corresponding to the input point identification number 21 that caused the alarm from the trend display information file 6, trend data storage file 8, and process data file 5.
TEP9.10.11), CR by combining the data before the alarm occurred and the constantly updated process data.
Display it on T9 (STEP 12). An example of the displayed trend screen is shown in FIG. As shown in the figure, the vertical axis of the trend display screen generally represents the process value.

The horizontal axis represents time T, and time series data of each process data is displayed to show fluctuations and trends of the process data. When displaying this trend screen, process values on the vertical axis are stored in a Y-axis upper limit coordinate file 23 and a Y-axis lower limit coordinate file 24 for each input point identification number 21, as shown in an example of the trend display information file 6 in FIG. , Y-axis scale 25 is given in advance. Regarding time T on the horizontal axis, one dot is expressed as one second, and the total number n of dots on the horizontal axis is the trend display time.

Further, the horizontal axis is divided at the center, and the left side shows data before the alarm, and the right side shows data after the alarm occurs.

Therefore, the trend data storage file 8 is a file that can store n/2 pieces of data for each input point identification number.

As a result, when an alarm occurs, the trend storage data display means 4 extracts the scale corresponding to the input point identification number from the trend display information file 6, and the scale corresponding to the input point identification number 21 that caused the alarm is extracted from the trend data storage file 8. Data is extracted for n/2 dots and displayed on the left half of FIG. 8 as data before the alarm. Next, process data file 5 is used as data after the alarm occurs.
Each time the contents of , are updated, the same trend saved data display means 4 extracts the data and continues to display it on the right half of FIG.

〔Effect of the invention〕

As explained above, according to the process monitoring device of the present invention, data generated as an alarm is displayed together with past time-series data stored in advance at the same time as the alarm occurs, without registering trend items. Changes and trends in data or alarms can be instantly provided to operators, improving plant monitoring functions.

[Brief explanation of the drawing]

Figure 1 is a block diagram of the process monitoring device of the present invention, Figure 2 is a block diagram of the process monitoring device of the present invention.
3 and 4 are flowcharts showing the operation of the present invention, and FIG.
FIG. 6 is a block diagram of a conventional process monitoring device, FIG. 6 is a diagram showing both sides of the trend display according to the present invention, and FIGS. 7 and 8 are diagrams showing examples of files. 1: Process input/output device 2: Process data input means 3: Alarm detection means 4: Trend storage data display means 5: Process data file 6: Trend display information file 7: Trend data storage means 8: Trend data storage file 9: CRT 10: Keyboard 11: Trend registration means 12: Trend registration data file 13: Trend data display means 14: Trend registration request 15: Trend display request 16
:Trend save data 17:Trend data 18:Alarm level 19:
Alarm occurrence time 20: Trend storage counter 21 - input point identification number 22: Trend storage data 23: Y-axis upper limit coordinate 24: Y-axis lower limit coordinate 25: Y
Axis scale agent Patent attorney Nori Ken Ken Yudo Daishimaru Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 Figure 6 Figure 7-

Claims (1)

[Claims] Consists of an electronic computer, process input device and display device,
A process monitoring device that displays trend data includes an alarm detection means that determines whether or not the input process data is in an alarm state each time a process is input, and if it is in an alarm state, switches to the trend display of that input point; It consists of a trend data storage means that saves process data in a trend data storage file each time it is input, and a trend storage data display means that displays the data stored in the trend data storage file and displays the process data each time a process is input. , when the alarm detection means determines that the alarm state is present, the trend data storage means retrieves data before the alarm state from the trend data storage file and displays it on the display device, and the data after the alarm state is processed. A process monitoring device characterized in that each input is displayed on the display device.