JPH04364599A - Process control system monitoring device - 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]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a process control system monitoring device, and more particularly to a process control system monitoring device for monitoring the operating status of a process control system.

0002

[Prior Art] Generally, in process control, petroleum, steel,
Information about the status of the process control plant, such as gas (
For example, temperature, pressure, flow rate, etc.) are taken in and controlled to ensure that the plant functions safely and efficiently according to the wishes of operators and production managers. In order to perform this process control, it is necessary to monitor the state of the process. Therefore, in process control system monitoring equipment, man-machine interface equipment is usually used as an interface between the operator and the process to improve the productivity and productivity of process operation.
We strive to ensure and improve safety. This man-machine interface device plays an important role as a means for providing appropriate information to operators regarding the operating status of the plant, and as a means for providing information for operations such as maintenance and maintenance of the plant.

By the way, as a process monitoring method in a conventional process control system monitoring device, as shown in FIG. 7, a pattern representing the status of the monitored object is displayed on the display screen in green when it is normal and red when it is abnormal. is common. Particularly in a distributed control system, if the process status cannot be monitored due to an abnormality in the transmission section in data communication between the upper operation monitoring station and the lower control station, the monitoring is performed as shown in Figure 8. Either do not display the pattern representing the target state on the screen, or
Or, the state immediately before the data communication error occurred (past state) remains displayed.

0004

[Problems to be Solved by the Invention] However, in conventional process control system monitoring devices, if there is no display in the case of a data communication error, the pattern that should normally be displayed on the display screen will not be displayed, making it difficult for the operator to It becomes impossible to recognize whether there are other targets to be monitored other than those displayed on the screen. Additionally, there was an unresolved problem in that if the status immediately before a data communication error occurred (past status) was left displayed, it would be impossible to determine whether or not the current monitoring status was normal, that is, whether monitoring was possible or not. .

[0005] This invention was made in order to solve the conventional problems as described above, and when the process status cannot be monitored due to data communication abnormality in process control, the monitoring target is displayed on the display screen. The object of the present invention is to provide a process control system monitoring device that can notify by display color that the corresponding process is in a state where it cannot be monitored.

[0006]

[Means for Solving the Problems] A process control system monitoring device according to the present invention is a process control system monitoring device equipped with a display means for displaying the operating status of a target to be monitored, such as a process control plant, in a specific color. communication system abnormality detection means for detecting an abnormality in a data communication system that collects monitoring data from the monitoring target; and when the communication system abnormality detection means detects an abnormality in the data communication system, a corresponding The above object is achieved by providing a configuration including display color changing means for changing the display color of the status display.

[0007]

[Operation] During normal operation when no abnormality is detected by the data communication abnormality detection means, the display means displays the status of the monitored object in a specific color such as green within the display frame, but when an abnormality in the data communication system is detected. By changing the inside of the display frame to black using the display color changing means, only the display color is changed without changing the display shape.

Therefore, it is possible to immediately notify the operator that monitoring is not possible due to an abnormality in the data communication system.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Examples of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an example of a distributed process control system to which the present invention can be applied. Figure 2
-FIG. 4 is a flowchart of a monitoring information display processing program for a process control system monitoring device according to the present invention, and FIGS. 5 and 6 are examples of displaying a monitoring target on a display screen according to the present invention.

In FIG. 1, reference numeral 1 denotes an operation/monitoring station, which includes at least a control section 2 and a color CRT display 3 as a display section. This operation/monitoring station 1 is configured as a man-machine interface device that can collect information on the entire process as a monitoring target and perform centralized monitoring/operation.
(ontrol) control of heating, compression, separation, purification, etc. for the process control plant as a subject to be monitored, and collection of monitoring information such as temperature, pressure, flow rate, etc. will be carried out.

The control unit 2 has a built-in communication control program, and the communication control program constantly collects the process control plant monitoring information collected by the control station 5 at a predetermined timing, and the collected monitoring information is stored in the built-in communication control program. The stored data is stored as monitoring data in the stored storage unit, and the stored data is updated every time new monitoring data is collected.
The data communication system between the operation/monitoring station 1 and the control station 5 and between the control station 5 and the process control plant are Detects abnormalities in the data communication system and creates display information that displays the operating status of the process control plant in a specific color based on the monitoring data collected in response to the operator's display request, and displays this on the color CRT display 3. Output.

Next, the operation of the above embodiment will be explained with reference to FIGS. 2 to 4 showing the processing procedure of the control section 2. FIG. 2 is a flowchart showing an overview of monitoring information processing, which is executed in response to an operator's display request. When there is a display request,
In step S1, it is determined whether the display request screen is an annunciator screen or a TAG menu screen. here,
The annunciator screen is a screen that displays the operating status of each process in an alarm window.
The AG menu screen is a screen that displays the status of the controller, such as PID control and ratio control, by name (TAGNO.) of the controller.

If it is an annunciator screen, the process moves to step S2 to execute an annunciator screen editing process, and then step S4 is executed. Display request screen is TA
If it is the G menu screen, the process moves to step S3 to execute editing processing for the TAG menu screen, and then to step S4.
Move to. In step S4, the edited screen information is sent to the color CRT display 2, and the display request process is ended.

The color CRT display 2 displays the status on the display screen based on the sent display information. In the annunciator screen editing process, as shown in FIG. 3, in step S21, information regarding the first DDC device is searched from among the monitoring data collected by the communication control program, and in step S22, information regarding the first DDC device is searched. It is determined whether the data communication was performed normally. This determination is made, for example, based on whether or not a communication system abnormality flag is set in the monitoring data. If the flag is set, it is determined that an abnormality has occurred in the data communication system, and step S26
If the flag is not set, it is determined that the data communication system is normal, and the process moves to step S23. In step S23, the status of the process being monitored by the DDC device is searched from among the information similarly collected by the communication control program, and it is determined whether the process is operating normally. This determination is made based on whether the data of the corresponding process in the monitoring data indicates normality or abnormality. If it is not normal, the process moves to step S25, and if it is normal, the process moves to step S24.

In step S24, since the process was normal, the display colors of the alarm window on the screen of the color CRT display 3 are set to, for example, white for the display frame, green for the inside of the display frame, and black for the alarm name. , the process moves to step S27. In step S25, since the process is abnormal, the display color of the alarm window on the screen of the color CRT display 3 is changed to, for example, white for the display frame and red for the inside of the display frame.
The alarm name is changed to black, and the process moves to step S27. In step S26, since the data communication was abnormal,
The display color of the alarm window on the screen of the color CRT display 3 is changed to, for example, the display frame is white, the inside of the display frame is black, and the alarm name is white, and the process moves to step S28.

[0016] In step S27, it is determined whether the processing for the process monitored by the DDC device has been completed. If it has not finished, return to step S23 and process the next process; if it has finished, return to step S23.
Move to 28. In step S28, it is determined whether the processing for all DDC devices has been completed. If the process has not been completed, the process returns to step S21 to process the next DDC device, and if the process has been completed, the process proceeds to step S29.

In step S29, since display colors have been determined for all processes, editing is performed to display the screen on the color CRT display 3, and the process returns. Here, the determination process in step S22 corresponds to communication system abnormality detection means, and the processes in steps S24 to S26 correspond to display color changing means. Therefore, when the data communication system is normal and the operating state of the process is normal based on the collected monitoring data, steps S22 and S2
Since the process moves to step S24 through step 3, in FIG. 5, the display frame is displayed in white, the inside of the display frame is displayed in green, and the alarm name is displayed in black, as shown by the symbol A, but the operating state of the process is abnormal. In some cases, the process moves from step S23 to step S25, so the display frame is displayed in white, the inside of the display frame is displayed in red, and the alarm name is displayed in black, as shown by reference numeral B in FIG. Further, when the data communication system is abnormal, the process moves from step S22 to step S26, so that the display frame is displayed in white, the inside of the display frame is black, and the alarm name is displayed in white, as shown by symbol C in FIG. .

[0018] Furthermore, the editing process for the TAG menu screen is as follows:
As shown in FIG. 4, in step S31, information regarding the first DDC device is searched from among the monitoring data collected by the communication control program, and in step S32, information regarding the first DDC device is searched.
Determine whether data communication with the device was performed normally. This determination is made, for example, based on whether or not a communication system abnormality flag is set in the monitoring data. If the flag is set, it is determined that an abnormality has occurred in the data communication system, and the process moves to step S36, and the flag is flagged. If not set, it is determined that the data communication system is normal and the process moves to step S33. In step S33, the status of the process being monitored by the DDC device is searched from among the information similarly collected by the communication control program, and it is determined whether the process is operating normally. This determination is made based on whether the data of the corresponding process in the monitoring data indicates normality or abnormality. If not normal, step S3
If the process is normal, the process moves to step S34.

In step S34, since the process was normal, the TA on the screen of the color CRT display 3
GNO. The display color is set to green, for example, and the process moves to step S37. In step S35, since the process is abnormal, the T on the screen of the color CRT display 3 is
AGNO. The display color is changed to red, for example, and the process moves to step S37. In step S36, since the data communication was abnormal, the TAGNO. on the screen of the color CRT display 3. The display color is changed to, for example, white, and the process moves to step S38.

[0020] In step S37, it is determined whether the processing for the process monitored by the DDC device has been completed. If it has not finished, return to step S33 and process the next process; if it has finished, return to step S33.
Move to 38. In step S38, it is determined whether the processing for all DDC devices has been completed. If the process has not been completed, the process returns to step S31 to process the next DDC device, and if the process has been completed, the process proceeds to step S39.

In step S39, since display colors have been determined for all processes, editing is performed to display the screen on the color CRT display 3, and the process returns. Here, the determination process in step S32 corresponds to communication system abnormality detection means, and the processes in steps S34 to S36 correspond to display color changing means. FIG. 6 shows PID control,
The status of the controller such as ratio control can be determined by the name of the controller (TAGN).
The screen on the color CRT display 3 displayed at (O)
This is an example of the TAG menu screen) and shows the status display when the process status cannot be monitored due to an abnormality in the data communication system. In the figure, the name (TAGNO.) is displayed in green when the process monitoring information is normal, and red when it is abnormal, as described above. and,
When the status of a process cannot be monitored due to a data communication failure or the like, the name (TAGNO.) is displayed in white to distinguish it and notify the operator. In addition, TAGNO. is a name given to a process measurement point or control loop, for example, TIC101 is a name given to a process measurement point or control loop.
Temperature (T) instruction (I) and control (C) NO.
．． 101 loop.

As described above, if the process status cannot be monitored due to an abnormality in the data communication system, the display screen of the color CRT display 3 can be displayed by changing the display color without changing the display shape. It becomes possible to notify the existence of a target to be monitored, and also to notify that it is in a state where it cannot be monitored. In particular, when the process status cannot be monitored, visibility is best achieved by using the above display colors.

[0023] In the above embodiment, the monitoring screen is
Although the annunciator screen and the TAG menu screen have been described, the present invention can also be applied to other necessary monitoring screens. In the above embodiments, the display screen is a color CRT display, but the display screen is not limited to this, and may be a liquid crystal display or other display.

[0024]

[Effect of the invention] All the monitoring targets that are normally displayed on the display screen of the process control system monitoring device are always displayed regardless of whether the status can be monitored, and if the status cannot be monitored, the display color is changed. This makes it possible to notify on the display screen that there are other objects that should be monitored at the same time and that they cannot be monitored, making it easier to recognize them during monitoring and operation during plant operation. This has the effect of making it clearer.

[Brief explanation of drawings]

FIG. 1 is a diagram of an example configuration of a process control system in an embodiment.

FIG. 2 is a flowchart showing an overview of monitoring information processing in the embodiment.

FIG. 3 is a flowchart showing annunciator screen editing processing in the embodiment.

FIG. 4 is a flowchart showing editing processing of the TAG menu screen in the embodiment.

FIG. 5 is a state display diagram on an annunciator screen in the embodiment.

FIG. 6 is a state display diagram on the TAG menu screen in the embodiment.

FIG. 7 is a normal state display diagram of the annunciator screen.

FIG. 8 is a state display diagram on an annunciator screen in a conventional case where state monitoring is not possible.

[Explanation of symbols]

1 Operation/monitoring station 2 Control section 3. Color CRT display 4 Data way 5 Control station 6 Process interface

Claims (1)

[Claims] Claim 1. A process control system monitoring device comprising display means for displaying the operating status of a monitoring target such as a process control plant in a specific color, wherein a data communication system for collecting monitoring data from the monitoring target is provided. A communication system abnormality detection means for detecting an abnormality, and a display color changing means for changing the display color of the corresponding status display on the display means when the communication system abnormality detection means detects an abnormality in the data communication system. A process control system monitoring device characterized by: