JPH11224121A - Display monitor device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a display monitor device which can make data equivalent by informing respective display monitor devices of modifications of external data at the same time and saving them. SOLUTION: When the display monitor device 2 having a CRT display device which displays data saved in an engineering database 3 with characters or figures receives a request to modify data from an engineering tool 1, etc., a tool interface part 2b delivers the request to modify data to all the display monitor devices and an engineering data management server 2a modifies the data saved in the engineering database 3. Consequently, the data can be made equivalent for all the display monitor devices.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a display monitoring device for displaying the status of a control target of various plants, public facilities and the like (hereinafter, generally referred to as a plant, etc.) on CRT display means and monitoring the status. The present invention relates to a display monitoring device provided with means for managing data for displaying and monitoring the state of a plant or the like and performing equalization.

[0002]

2. Description of the Related Art Conventionally, in a plant or the like, a monitoring and control device for monitoring and controlling a control target is often used. In recent years, a display / monitoring device has been provided which performs monitoring by displaying characters and graphics on a CRT display device.

In this display monitoring apparatus, a plurality of processes such as a process for displaying a state and a process for monitoring and controlling a control target are operating. The data used by the display monitoring device for monitoring and control has a table structure, and is stored for each item. This table is stored in a memory (hereinafter, referred to as a shared memory) accessible from each display monitoring device, and is managed in table units.

[0004] Writing to the shared memory is performed from a plurality of display monitoring devices, engineering tools, or external devices (such as FDs). As described above, by managing the data in units of tables, there is a problem that the data is accessed simultaneously from the process and the security of the data cannot be guaranteed. In addition, there is a problem that even if exclusive processing is incorporated to cope with security in order to ensure security when a plurality of processes simultaneously access, the security is not completely guaranteed.

Further, a change in some data must be notified in the entire table, and if there is a display monitoring device that has forgotten to recognize the presence or absence of the change, the state will be inconsistent with other display monitoring devices after initialization. Had occurred.

[0006]

A display monitoring device for monitoring a state of a plant or the like must perform each processing accurately and promptly at any time. However, as described above, in the conventional display monitoring device, the security of data management is not completely ensured due to access from a plurality of processes. In addition, the equalization of the data of the display monitoring device is insufficient, and a state mismatch after initialization has occurred.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a display monitoring device capable of notifying a change of data from an engineering tool or the like to each display monitoring device at the same time and storing the data, thereby equalizing the data. And

Further, the present invention provides a display monitoring device capable of ensuring the security of management data without incorporating exclusive processing by controlling so that one input operation or one output operation is performed simultaneously. The purpose is to:

Further, the present invention shortens the change notification time by notifying and storing only changed portions by managing data as management data comprising pairs of identification information and corresponding real data. It is an object of the present invention to provide a display monitoring device capable of performing the display.

Still further, according to the present invention, data is simultaneously changed from a display monitoring device, data is equalized, and data is compared with another display monitoring device at the time of startup after initialization. It is an object of the present invention to provide a display monitoring device that performs data loading when the data of the display monitoring device is the latest, equalizes the data, and does not operate in a mismatch state with other display monitoring devices.

[0011]

In order to achieve the above object, the present invention provides a display monitor having data storage means for storing data relating to a controlled object, and display means for displaying the data stored by this means. A data management means for managing data stored by the data storage means; and when receiving a data change request from the outside, the data management means changes the data stored in the data storage means and performs other display monitoring. Means for delivering a data change request to the apparatus.

By providing such means, when a request for data change is received from an external device such as an engineering tool, the data can be changed simultaneously in all the display monitoring devices, and equalization can be easily performed. It can be carried out.

Here, the data storage means is managed by only one data management means, and is controlled by one data management means so that only one input operation or output operation is performed simultaneously. it can.

[0014] By using the data storage means in this manner, only one input / output operation can be performed at the same time through one data management means, so that the security of data is guaranteed without providing an exclusive process. it can.

The data stored in the data storage means is constituted as management data composed of a pair of identification information and corresponding real data, and management and change of the management data by the data management means are performed using the identification information. Can be done.

[0016] By adopting such a configuration of data, a data change notification can be performed in pairs of the identification information and the actual data corresponding to the identification information. Processing can be performed.

Further, when the display monitor is started up after initialization, the display monitor is further provided with means for comparing data with other display monitor, equalizing the data, and then controlling to operate. It can also be.

By providing such means, even when one of the plurality of display monitoring devices is restarted, the operation of the display monitoring devices in a mismatch state is not performed. You can do so.

[0019]

Embodiments of the present invention will be described below in detail with reference to the drawings. In the following drawings, the same reference numerals indicate the same or corresponding parts. FIG.
FIG. 1 is a block diagram illustrating a configuration of a system in which a plurality of display monitoring devices are connected according to a first embodiment of the present invention.

In this system, the display monitoring device 2 displays
It comprises an engineering tool 1 for editing management data used for monitoring and control, and a plurality of display monitoring devices 2. The engineering tool 1 and the plurality of display monitoring devices 2 are connected by a transmission path (Ethernet) 4, and the engineering data management server 2 a of each display monitoring device 2 has an engineering database 3.

FIG. 2 shows the hardware configuration of the display monitoring device 2.
Shown in In the display monitoring device 2, the CRT display unit 21
Has a display screen for displaying characters or figures. The function keyboard 22 is an operation console on which function keys to which predetermined processing functions are assigned are arranged. The input / output control unit 23 is a circuit that controls input / output of the function key code output from the function keyboard 22 and transmits the function key code to the main control unit 24. The main control unit 24 includes an engineering data management server 2a and a tool interface unit 2 having a tool interface function.
b.

Next, this operation will be described. Changes in data from the engineering tool 1 are transmitted via the transmission path (Ether
1), a request is made to one display monitoring device 2 via the net 4 and a change of data is requested from the external device (FD) 5 to one display monitoring device 2.

In the display monitoring device 2, the tool interface unit 2b receives this data change and delivers the data change to the engineering data management server 2a of all the connected display monitoring devices 2.

As shown in FIG. 3, the management data stored in the engineering database 3 is composed of a pair of identification information (key) and actual data (detailed contents). Since the management / recognition is performed, each engineering data management server 2a searches for a key of data for which a change request has been made, and changes only the actual data corresponding to the key.

The processing when the display monitor 2 receives this data change will be further described with reference to FIGS. FIG. 4 is a flowchart showing a procedure of processing of the tool interface unit 2b, and FIG. 5 is a flowchart showing a procedure of processing of the engineering data management server 2a.

The tool interface unit 2b waits for an external connection, ie, waits for a change request from the engineering tool 1 or the external device (FD) 5 (step 41). If it is (step 42), all the display monitoring devices 2
To the engineering data management server 2a of its own device, and to all other display monitoring devices 2.
A change notification is also issued to the engineering data management server 2a (step 43).

By performing such processing, the changed contents can be simultaneously delivered to each engineering data management server 2a, and data equalization can be performed in all display monitoring devices.

The engineering data management server waiting for a processing request (step 51) searches for a key if the notification received from the tool interface unit 2b is a change notification (step 52).
And the change of data (step 54) is executed only for the number of changed data.

By performing such processing, information on change data can be reduced, and the processing time for change notification can be shortened. When the engineering data management server 2a recognizes the restart of the display monitoring device 2 after the initialization (step 55), the contents of the management data of the other display monitoring device 2 and the self-management data are checked, For example, the version information and the like of each table of the management data of the other display monitoring device 2 and the self-management data are compared (step 56), and if the self-management data is old (step 57), the other display monitoring device The latest management data stored in the device 2 is read out, for example, in table units, written into the database 3 of the own device, and the data is equalized (step 58).

Thereafter, the next operation is waited, and the above processing is repeated. According to this embodiment that performs such processing, data equalization can be performed, and operation in a mismatched state after initialization is also eliminated. Furthermore, since a plurality of requests are not processed (that is, the server of the plurality of display monitoring apparatuses 2 does not simultaneously access the shared memory as in the related art), there is no need to incorporate exclusive processing, and data security is eliminated. Can be guaranteed.

Next, a second embodiment of the present invention will be described. That is, in the above-described embodiment, when a data change request from the engineering tool 1 or the external device (FD) 5 is made to one display monitoring device 2, the tool interface unit 2b transmits all other data. Although the change notification is also issued to the display monitoring device 2, in the second embodiment, the engineering data management server 2a performs the change notification to all the other display monitoring devices 2. Things.

In the second embodiment, the configuration of the system, the configuration of the hardware of the display monitoring device 2, and the configuration of the management data may be the same as those of the first embodiment shown in FIGS. FIG. 6 shows the procedure of processing by the tool interface unit 2b when the display monitoring device 2 receives a data change, and FIG. 7 shows the procedure of processing by the engineering data management server 2a.

Next, in the second embodiment, the operation when the display monitoring device 2 receives a data change will be described with reference to FIG.
This will be described with reference to FIG. The tool interface unit 2b waits for an external connection, that is, waits for a change request from the engineering tool 1 or the external device (FD) 5 (step 61). When the request is received, if it is a change notification (step 62). ), Requests the engineering data management server 2a of the own device to change the data of the own device and deliver the change request to all other display monitoring devices 2 (step 63).

The engineering data management server 2a waiting for a processing request (step 71) searches for a key (step 72) if the notification received from the tool interface unit 2b is a change notification (step 72).
3) and data change (step 74) are executed only for the number of changed data. Then, all other display monitoring devices 2
A change notification is also issued to the engineering data management server 2a (step 75).

By performing such processing, also in the second embodiment, information on change data can be reduced, and processing time on change notification can be shortened.

When the engineering data management server 2a recognizes the restart of the display monitoring device 2 after initialization (step 76), the other display monitoring device 2
The contents of the management data and the self-management data are checked (step 77). If the self-management data is old (step 78), the latest management data stored in the other display / monitoring device 2 is updated. The data is read out and written into the database 3 of the own device, and the data is equalized (step 7).
9). Thereafter, the next operation is waited, and the above processing is repeated.

Therefore, also in the second embodiment,
Data equalization can be performed, and operation in a mismatched state after initialization is also eliminated. Further, since a plurality of requests are not processed, that is, the server of the plurality of display monitoring apparatuses 2 does not access the shared memory at the same time as in the related art, there is no need to incorporate an exclusive process and the data security. Can be guaranteed.

When the number of requests for data change from the engineering tool 1 or the external device (FD) 5 is relatively small, as in the second embodiment, all other display monitoring devices 2 are sent. The engineering data management server 2a can perform all the change notifications. However, when the number of data change requests from the engineering tool 1 or the external device (FD) 5 increases, as in the second embodiment, When the engineering data management server 2a sends a change notification to all the other display monitoring devices 2, the load on the engineering data management server 2a increases. As in the first embodiment, a change notification to all the other display monitoring devices 2 is sent to the tool interface. It is better to face portion 2b is carried out.

[0039]

As described above, according to the present invention,
Since the data change from the engineering tool or the like can be notified to each display monitoring device at the same time and the data can be equalized, the security of the data can be easily secured.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a system in which a plurality of display monitoring devices are connected according to first and second embodiments of the present invention.

FIG. 2 is a block diagram showing a hardware configuration of a display monitoring device according to the first and second embodiments of the present invention.

FIG. 3 is a diagram illustrating a configuration of management data according to the first and second embodiments of the present invention.

FIG. 4 is a flowchart illustrating a processing procedure of a tool interface unit according to the first embodiment of the present invention.

FIG. 5 is a flowchart showing a processing procedure of the engineering data management server according to the first embodiment of the present invention.

FIG. 6 is a flowchart illustrating a processing procedure of a tool interface unit according to the second embodiment of the present invention.

FIG. 7 is a flowchart showing a processing procedure of the engineering data management server according to the second embodiment of the present invention.

[Description of Signs] 1 ... Engineering tool 2 ... Display monitoring device 3 ... Engineering database 4 ... Transmission path (Ethernet) 5 ... External device (FD) 21 ... CRT display device 22 ... Function keyboard 23 ... Input / output control device 24 ... Main Control unit (CPU) 2a Engineering data management server 2b Tool interface unit

Claims (4)

[Claims] 1. A display monitoring device having a data storage means for storing data relating to a control target and a display means for displaying the data stored by this means, wherein the data stored by said data storage means is managed. Data management means, and means for changing data stored in the data storage means when receiving a data change request from the outside, and delivering the data change request to another display monitoring device. And a display monitoring device. 2. The data storage means is managed by only one data management means, and is controlled by one data management means so that only one input operation or one output operation is performed at the same time. The display monitoring device according to claim 1, wherein 3. The data stored in the data storage means is configured as management data comprising pairs of identification information and corresponding real data, and the management and change of the management data by the data management means are performed by the identification information. The display monitoring device according to claim 1, wherein the display monitoring is performed by using. 4. A system further comprising means for comparing data with another display monitoring device at the time of starting up the display monitoring device after initialization, performing equalization of the data, and then controlling the device to operate. The display monitoring device according to any one of claims 1 to 3, wherein: