JPH04364591A - Data logger system - Google Patents

Abstract

PURPOSE:To collect the correct data even when a system is stopped by reading the data stored temporarily to each site controller by a central data logger device and processing this. CONSTITUTION:Each site controller 1 has a plant data input function 8, a table preparing data filing input function 9, a table preparing data file 10, a table preparing data transmitting request receiving function 11 and a table preparing data transmitting function 12. At the cycle set beforehand, the data are collected from a plant, and the table preparing data are prepared and stored. A central data logger device 2 has a table preparing data transmitting request function 22, a table preparing data receiving function 23, a table preparing data file 24, a table preparing data preserving function 26, a table preparing data preserving file 27 and a table preparing function 28. At the cycle set beforehand, the table preparing data transmitting request is prepared, the table preparing data are collected from each site controller 1, this is preserved, and printed out from a printer 19.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a monitoring and control system that monitors a plant, operates equipment, prints tabulation data, etc. based on data such as plant status signals, process values, integrated values, etc. It relates to a data logger system that collects various plant data, records it, and prints it.

0002

[Prior Art] In a data logger device used in a plant, etc., the data logger device directly collects various plant signals inputted to a plurality of field controllers installed at the site of the plant, etc. Saved on a hard disk device etc. using time management,
Based on the saved data, tabulations for the entire plant etc. are printed later.

0003

However, the conventional data logger device described above has the following problems.

[0004] In other words, since tabulation data is collected dynamically by a central data logger device, when the central data logger device is stopped, all the tabulation data cannot be collected and data is missing. Put it away.

[0005] When data is missing, the operator goes to check the indicators, counters, etc. at the site, and after the data logger is restored, manually enters data into the data logger, causing the system to stop. There was a problem in that it was necessary to take steps to reprint the tabulations for the period that had been recorded.

[0006] Furthermore, as the scale of the system increases and the number of items to be printed in the tabulation increases, it becomes necessary for the central data logger device to dynamically collect data. Base load will increase.

[0007] Furthermore, if the load on the central data logger device increases, it becomes impossible to collect data under accurate time management, which is the purpose of the data logger. However, depending on the scale of the system, it may not be possible to maintain a cycle of one minute.

[0008] Therefore, when the scale of the system increases, it is conceivable to install multiple data logger devices in the system to reduce the load on each data logger device.
Since such a data logger device collects data independently under its own time management, even if the same item is printed, data inconsistency may occur due to a timing shift in data collection.

In view of the above circumstances, the present invention is capable of automatically collecting accurate data even when the central data logger device is stopped, and even when the system scale increases, the central data logger device can In addition, even when multiple data logger devices are installed in the system, it is possible to match data for the same item, and even when plant equipment is expanded. The object of the present invention is to provide a data logger system that can collect data under optimal conditions without being aware of the load on the data logger device.

0010

[Means for Solving the Problems] In order to achieve the above object, a data logger system according to the present invention collects data from a monitoring target side at a preset period by a plurality of data collection terminal devices, and In a data logger system in which data is collected and processed from each data collection terminal device by a central processing unit connected to the data collection terminal device via a transmission device, each data collection terminal device is transmitted at a preset period. Data is collected from the monitoring target side and temporarily stored, and the central processing unit reads out the data temporarily stored in each data collection terminal device at a preset period when a system failure has not occurred. Process this, and if a system down occurs during reading, after the system down is recovered, read out the unread data among the data temporarily stored in each data collection terminal device and restart the process. It is characterized by

[0011]

[Operation] In the above configuration, data is collected from the monitoring target side at a preset period by each data collection terminal device and temporarily stored, and when there is no system down, the data is stored in advance by the central processing unit. The data temporarily stored in each data collection terminal device is read out and processed at a set cycle;
When a system failure occurs during reading, after the system failure is recovered, the central processing unit reads out unread data from among the data temporarily stored in each data collection terminal device and resumes processing. be done.

0012

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing an embodiment of a data logger system according to the present invention.

The data logger system shown in this figure has a plurality of on-site controllers 1 provided on the plant side, a data logger device 2 provided on the central side, and each of these on-site controllers 1 and the data logger device 2 are connected. Each field controller 1 collects and files data from the plant, and the data logger device 2 periodically collects data that has been filed to each field controller 1. Create table data and print or display it.

Each field controller 1 includes a process input/output device 4 that collects plant data at preset intervals as shown in FIG. Data file 1
A central processing unit (CPU) 5 that creates data 0, a memory 6 that stores tabulation data files 10 created by this central processing unit 5, and a transmission device that communicates with the data logger device 2 via a transmission device 3. As shown in FIG. 4, the control device 7 includes a plant data input function 8, a tabulation data filing input function 9, a tabulation data file 10, a tabulation data transmission request reception function 11, and a tabulation data filing function 9. It has a transmission function 12, collects data from the plant at a preset period, creates tabulation data and stores it, outputs a tabulation data request from the data logger device 2, and transmits this to the transmission device. 3, the stored tabulation data is sent onto the transmission device 3 and transmitted to the data logger device 2.

The plant data input function 8 collects plant data at preset intervals and supplies this to the table data filing input function 9.

The tabulation data filing input function 9 creates time-series tabulation data based on the data supplied from the plant data input function 8, and supplies this to the tabulation data file 10.

The tabulation data file 10 is backed up by a battery and has a capacity capable of storing about one week's worth of tabulation data. Every time data is supplied, if the memory is not full, the new tabulation data supplied from the tabulation data filing input function 9 is stored as is, and if the memory is full, the oldest tabulation data is stored as is. The tabular data is deleted and new tabular data supplied from the tabular data filing input function 9 is stored.

Further, when a tabulation data transmission request reception function 11 is issued from the data logger device 2 via the transmission device 3, the tabulation data transmission request reception function 11 receives the tabulation data transmission request and transmits it to the tabulation data transmission function 12. Notify that a request has been made.

When a transmission request is accepted by the tabulation data transmission request receiving function 11, the tabulation data transmission function 12 transmits the transmission request date requested by the transmission request;
When the time is checked and tabulation data corresponding to the check result exists in the tabulation data file 10, the corresponding tabulation data is read out from the tabulation data file 10 and sent to the transmission device 3. When transmitted to the data logger device 2 and when there is no tabulation data corresponding to the check result in the tabulation data file 10, for example, the corresponding tabulation data is past tabulation data that has already been deleted. At this time, a message indicating that there is no corresponding tabulation data is created, sent to the transmission device 3, and transmitted to the data logger device 2.

As shown in FIG. 3, the data logger device 2 includes a transmission control device 15 that communicates with each of the field controllers 1 via the transmission device 3, and data from each field controller 1 taken in by this transmission control device 15. A central processing unit (CPU) 16 that imports tabulation data and creates a tabulation data storage file, a memory 17 that temporarily stores the tabulation data imported by this central control device 16, and the central control device. 16, a printer 19 that prints out the contents of the tabulation data storage file stored in this auxiliary storage device, and processing contents of the central control device 16. CRT2 that displays on the screen
0, and a keyboard 21 which generates various commands based on the contents operated by an operator etc. and supplies them to the central control unit 16, and has a table data transmission request function 22 as shown in FIG. , has a tabulation data reception function 23, a tabulation data file 24, a tabulation data reception status display function 25, a tabulation data storage function 26, a tabulation data storage file 27, and a tabulation printing function 28. , generates a tabulation data transmission request at a preset period, sends it to the transmission device 3, collects tabulation data from each field controller 1, stores it, and sends it to the printer 1.
Print out from 9.

The tabulation data transmission request function 22 generates a tabulation data transmission request including the requested date and time every preset period (for example, one hour), and sends the tabulation data transmission request to the transmission device 3.
and transmits it to each site controller 1.

Furthermore, when tabulation data is transmitted from each field controller 1, the tabulation data receiving function 23 receives the tabulation data via the transmission device 3 and supplies it to the tabulation data file 24.

The tabulation data file 24 is configured to have a capacity sufficient to hold the tabulation data supplied from each field controller 1 for a predetermined period, and the tabulation data file 24 is configured to have a capacity sufficient to hold tabulation data supplied from each field controller 1 for a predetermined period. Remember this when it happens.

Further, when the data logger device 2 is stopped and restored, the tabulation data reception status display function 25 displays the tabulation data file 2 based on an instruction from the keyboard 21.
4 and creates a screen showing the contents received from each field controller 1 and displays it on the CRT 20, and when a retransmission request command is input from the keyboard 21. In response to this retransmission request command, the tabulation data transmission request function 22 is controlled to generate a tabulation data transmission request for requesting untransmitted tabulation data to the field controller 1 instructed by the retransmission request command.

In this case, the screen displayed on the CRT 20 has a window 29 showing the reception status from each field controller 1 as shown in FIG. The date of tabulation data that has been supplied and the date of tabulation data that has not yet been received are displayed.

Further, the tabulation data storage function 26 reads out each tabulation data stored in the tabulation data file 24, creates tabulation data for long-term storage, and saves the tabulation data. It is supplied to file 27.

The tabulation data storage file 27 is constituted by an external storage device such as a hard disk device, an optical disk device, a magnetic tape device, etc., and when tabulation data for storage is supplied from the tabulation data storage function 26, This is captured and stored on a storage medium.

Furthermore, when a print command is input from the keyboard 21, the tabulation printing function 28 prints tabulation data stored in the tabulation data file 24 or stored in the tabulation data storage file 27. Among the tabulation data, the tabulation data designated by the print command is read out and printed out from the printer 19.

As described above, in this embodiment, each field controller 1 collects data from the plant at a preset period (for example, 1 minute), and creates table data based on each of these data. is created and temporarily stored, while the data logger device 2 collects the table data temporarily stored in each of the field controllers 1 at a preset period (for example, one hour). Even if the central data logger device 2 stops, normal data can be automatically collected, and even if the system scale increases, the steady load on the central data logger device 2 does not increase. can do.

Furthermore, even when a plurality of data logger devices 2 are installed in the system as shown in FIG. Data can be collected under optimal conditions without worrying about load.

Furthermore, in each of the embodiments described above, tabulation data is temporarily stored in the memory 6 provided on the field controller 1 side. An auxiliary storage device such as a device may be provided, and tabulation data may be stored in this auxiliary storage device. This allows tabulation data to be stored for a long period of time on the field controller 1 side without relying on the data logger device 2, so tabulation data storage processing on the data logger device 2 side can be omitted and data logger device 2 Processing load can be reduced.

Furthermore, in each of the above-described embodiments, when the field controller 1 stores new tabulation data in the tabulation data file 10 when the memory is full,
Although the oldest tabulation data stored in the tabulation data file 10 is deleted and new tabulation data is stored, the field controller 1 has auxiliary storage such as a hard disk device, optical disk device, magnetic tape device, etc. When the device is installed and new tabulation data is stored in the tabulation data file 10 with the memory full, the oldest tabulation data stored in the tabulation data file 10 is retrieved and stored in the auxiliary storage device. Save and save on-site controller 1
Tabulation data may be stored on the side for a long period of time.

Furthermore, in the above-described embodiment, the data logger device 2 collects tabular data created by the field controller 1, but some of the field controllers 1 include a hard disk device, an optical disk device, etc. , an auxiliary storage device such as a magnetic tape device is provided, and when the data logger device 2 is stopped for a long period of time,
Even if the data logger device 2 is backed up by collecting table data from the field controller 1 which is not equipped with an auxiliary storage device and storing it in the auxiliary storage device by the field controller 1 equipped with the auxiliary storage device. good.

Furthermore, in the above-described embodiment, when the data logger device 2 is stopped and the system is restored, unsent tabulation data is transmitted from each field controller 1 by manual operation. When the data logger device 2 is restored, the data logger device 2 side automatically finds unreceived table data and sends it from the field controller 1 side, which reduces the burden on the operator and prevents operational errors. It may also be possible to prevent table data from being omitted due to this.

Furthermore, in the embodiment described above, tabulation data created by each field controller 1 is taken in by the data logger device 2, but the transmission device 3
The table data created by each field controller 1 may be read out by another device connected to the field controller 1, thereby promoting effective use of the data.

[0036]

[Effects of the Invention] As explained above, according to the present invention, accurate data can be automatically collected even if the central data logger device is stopped.
Even when the system scale increases, the steady load on the central data logger device does not increase, and even when multiple data logger devices are installed in the system, data for the same item can be matched. As a result, even when plant equipment is expanded, data can be collected under optimal conditions without worrying about the load on the data logger device.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of a data logger system according to the present invention.

FIG. 2 is a block diagram showing a detailed circuit example of the field controller shown in FIG. 1;

FIG. 3 is a block diagram showing a detailed circuit example of the data logger device shown in FIG. 1;

FIG. 4 is a schematic diagram showing a functional example of the data logger system shown in FIG. 1;

5 is a schematic diagram showing a display example of the CRT shown in FIG. 1. FIG.

FIG. 6 is a block diagram showing another embodiment of a data logger system according to the present invention.

[Explanation of symbols]

1 Field controller (data collection terminal device) 2
Data logger device (central processing unit) 3 Transmission device 4 Process input/output device 5 CPU 6 Memory 7 Transmission control device 15 Transmission control device 16 CPU 17 Memory 18 Auxiliary storage device 19 Printer 20 CRT 21 Keyboard

Claims (1)

[Claims] Claim 1: A plurality of data collection terminal devices collect data from a monitoring target at a preset period, and a central processing unit connected to each data collection terminal device via a transmission device transmits each of the data. In a data logger system that collects and processes data from a collection terminal device, each of the data collection terminal devices collects and temporarily stores data from the monitoring target side at a preset period, and the central processing unit is configured to handle data when the system goes down. When no error occurs, the data temporarily stored in each data collection terminal device is read out and processed at a preset cycle, and when a system down occurs during reading, the system down is recovered. The data logger system is characterized in that the data logger system then reads unread data among the data temporarily stored in each of the data collection terminal devices and resumes processing.