JPH1141673A - Data collection method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a data collection method where a processing load of data display application is less. SOLUTION: The method is applied to a system consisting of a computer having a data display application 2 and a data collection application 3 and of a control device 10 that is connected to the computer via a communication channel. The data display application 2 makes a specific data collection request to the data collection application 3 and the data collection application 3 makes a request of transmission of specific data to the control device 10 for each prescribed period. Furthermore, the data collection application 3 discriminates a reception state of specific data by a reception management file 11 for each monitor time and requests transmission of the specific data to all the control devices 10 again depending on the discriminated result.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data collection method in a higher-level computer or a controller that requests data transmission from a lower-level controller (control device) or a computer that holds data and receives the data. About.

[0002]

2. Description of the Related Art FIG. 3 is an overall configuration diagram of a data collection system having a computer and a plurality of controllers. A conventional data collection method will be described with reference to FIG.

A computer 1 as a higher-level information processing device has a data display application (program) 2 having a function of displaying data on a CRT display or the like.
And a data collection application (program) 3 for collecting data from controllers 5 and 6 as lower-level information processing devices described later. The computer 1 has a plurality of controllers 5, 6 via a network 4.
Is connected.

The data display application 2 requests the data collection application 3 to collect specific data. In FIG. 3, the request data name 7 corresponds to the name of the specific data. The data collection application 3 receiving the data collection request includes the controller 5,
6 is requested to transmit the data of the requested data name 7.

[0005] The controllers 5 and 6 transmit data designated at regular intervals to the data collection application 3 via the network 4, and the data collection application 3 stores the received data in a storage device or the like (not shown). To be stored. The controllers 5 and 6 continue to transmit specific data at regular intervals unless the data display application 2 issues a request to stop collecting data. The reception data 8 indicates data corresponding to the request data name 7 stored in the storage device.

Here, the controllers 5 and 6 may not be able to transmit the requested data due to a temporary failure of the controllers 5 and 6. FIG. 4 is a diagram illustrating such a state according to a conventional data collection method.
The data display application 2 makes a data collection request s20 to the data collection application 3,
Data collection application 3 that received the collection request
Sends a specific data transmission request s to the controller 5a (other normal controllers are omitted in the figure).
Perform 21. However, the failed controller 5a cannot transmit the requested data to the data collection application 3. When data cannot be received within the monitoring time t10, the data display application 2 issues a data collection request s22 to the data collection application 3 again, and the data collection application 3 receiving the collection request sends the data collection application 3 to the controller 5a. On the other hand, the transmission request s23 of the specific data is performed again.

[0007]

Therefore, the data display application 2 must constantly monitor the data collection state during the monitoring time t10, which increases the processing load and causes other data processing to be performed in parallel. There have been inconveniences such as a delay in displaying the operation and a failure to display the operation.

Accordingly, an object of the present invention is to provide a data collection method with a small processing load on a data display application.

[0009]

According to an aspect of the present invention, there is provided an information processing apparatus including a data display application and a data collection application, and a communication line connected to the upper information processing apparatus. And a lower-level information processing device connected to the data collection system. First, the data display application issues a data collection request to the data collection application. Then, the data collection application requests the lower-level information processing device to transmit the specific data at regular intervals. Further, the data collection application determines a reception status of the specific data by a reception management file for each monitoring time, and again returns the specific data to all lower-level information processing apparatuses in accordance with the determination result. Is requested.

[0010] In the data collection system, the data display application first requests the data collection application to collect specific data. Then, the data collection application requests the lower-level information processing device to transmit the specific data at regular intervals. further,
The data collection application, for each monitoring time,
A reception management file is used to determine the reception status of the specific data, and to request transmission of the non-received specific data only to a lower-level information processing device holding the non-received specific data. .

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a conceptual diagram showing a data collection method according to a first embodiment of the present invention, and corresponds to the first embodiment of the present invention. First, the data display application 2 issues a data collection request s1 to the data collection application 3 as in the related art. The data collection request s1 includes a request data name 7 (for example, DA
TA1, DATA2, and DATA3). Data collection application 3 receiving data collection request s1
Transmits data corresponding to the requested data name 7 to the controller 10 (in the figure, a plurality of controllers are collectively displayed as one block) so as to continuously transmit data corresponding to the request data name 7 at regular intervals. Request s2 is made. The controller 10 transmits the data corresponding to the request data name 7 to the data collection application 3 at regular intervals (reply data d1, d2, d3, d4).

The data collection application 3 has a reception management file 11. The reception management file 11 is for the data collection application 3 to determine the collection state of the data corresponding to the request data name 7 at every predetermined monitoring time t1.

The operation of the reception management file 11 will be described in detail with reference to FIG. In the memory of the reception management file 11, all 0s are stored in the initial state. The controller 10 that has received the data transmission request s2 from the data collection application 3 transmits the reply data d1 to the data collection application 3. However, the controller 10
Has a failure, and the reply data d1 does not include all data corresponding to the request data name 7. The data collection application 3 stores the received data in a predetermined storage device (not shown), and stores 1 in a memory of the reception management file corresponding to the received data (the reception management file 11a). reference).

After transmitting the data transmission request s2 to the controller 10, the data collection application 3 determines the data collection state based on the reception management file after the monitoring time t1 has elapsed. Reception management file 11
0 remains in a, indicating that all the requested data could not be collected. Then, the data collection application 3 sends a data transmission request s to the controller 10 (all connected controllers) again.
Perform Step 3. The content of the data transmission request s3 is exactly the same as the transmission request s2.

The controller 10 having received the data transmission request s3 transmits reply data d2. The reply data d2 includes all requested data. Therefore, all 1s are stored in the reception management file 11b. Further, after the lapse of the monitoring time t1, the data collection application 3 sets the reception management file 11
b, it is confirmed that all request data has been received, 0 is stored in all memories of the reception management file 11b, and the reception management file is cleared (not shown). At this time, the data collection application 3 does not request transmission again. From now on, based on the transmission request s3, the controller 10 will transmit the requested data at regular intervals (reply data d3, d
4). Since the reply data d4 includes only data from some controllers, 0 is included in the memory of the reception management file 11d.

FIG. 2 is a conceptual diagram of a second embodiment of the present invention, and corresponds to the second embodiment of the present invention. This is the same as the first embodiment in that the data collection application 3 determines the collection state of the data corresponding to the request data name 7 by the reception management file 11 for each monitoring time t1.

Hereinafter, differences from the first embodiment will be described. It is assumed that the reply data d5 from the controller 10 does not include all of the requested data. Therefore, 0 is included in the reception management file 11e. The data collection application 3 is a controller 1
After transmitting the data transmission request s2 to 0, after the monitoring time t1 has elapsed, the data collection state is determined by the reception management file 11e. At this time, the data collection application 3 issues a second data transmission request s only to the controller to which the uncollected data is to be transmitted.
Do 10 That is, the data collection application 3
Means that the data transmission request s10 is sent again only to the controller to which the request data 2 and the request data 3 are to be transmitted.

Therefore, the controller that should transmit the request data 1, request data 4, and request data 5 transmits each request data to the data collection application 3 at regular intervals based on the first data transmission request s2. (Reply data d6). On the other hand, the controller which should transmit the request data 2 and the request data 3 transmits each request data to the data collection application 3 at regular intervals based on the data transmission request s10 again (reply data d7).

[0019]

As described above, according to the first or second aspect of the present invention, the data collection application periodically determines the reception state of the request data from the reception management file, and cannot receive all of the request data. Automatically sends a data transmission request, the monitoring burden on the data display application is eliminated, and the data display application can perform processing such as display accompanying other operations in parallel. Therefore, the function of the entire system is improved.

According to the second aspect of the present invention, since a data transmission request is made again only to a controller or the like to which the requested data could not be transmitted, the communication load in the network can be reduced and the processing time can be reduced. Can be shortened. This is particularly effective when a large number of controllers and the like are connected.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a first embodiment.

FIG. 2 is a conceptual diagram of a second embodiment.

FIG. 3 is an overall configuration diagram of a data collection system.

FIG. 4 is a diagram showing a conventional data collection method.

[Explanation of symbols]

1 Computer 2 Data Display Application 3 Data Collection Application 4 Network 5, 6 Controller 5a Controller 7 Request Data Name 8 Received Data 10 Controller 11 Reception Management File 11a, 11b, 11c, 11d, 11e Reception Management File s1 Data Collection Request s2, s3 S4 Data transmission request s10 Data transmission request d1, d2, d3, d4, d5, d6, d7 Return data

Claims (2)

[Claims] 1. A data collection system comprising: an upper information processing apparatus having a data display application and a data collection application; and a lower information processing apparatus connected to the upper information processing apparatus via a communication line. The display application makes a request for collecting specific data to a data collection application, and the data collection application requests the lower information processing apparatus to transmit the specific data at regular intervals, The data collection application determines the reception status of the specific data by the reception management file for each monitoring time, and, based on the determination result, returns the specific data to all lower-level information processing apparatuses again. A data collection method characterized by requesting transmission. 2. A data collection system comprising: a higher-level information processing apparatus including a data display application and a data collection application; and a lower-level information processing apparatus connected to the higher-level information processing apparatus via a communication line. The display application makes a request for collecting specific data to a data collection application, and the data collection application requests the lower information processing apparatus to transmit the specific data at regular intervals, The data collection application determines the reception status of the specific data by the reception management file for each monitoring time, and only the lower-level information processing apparatus holding the specific data that has not been received is not received. Data collection characterized by requesting transmission of specific data Collection method.