JP2003330506A - Apparatus and method for data backup in programmable controller - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To enable the replacing operation of a programmable controller by easily holding the state in operation with respect to an apparatus and method for data backup in the programmable controller. <P>SOLUTION: A file-creation part 6 creates three kinds of files (a), (b) and (c) in order to back up the data in the programmable controller 10. The PC data information file (a) stores the class/size of PC data that are read by a PC data reading part 5. The PC data file (b) stores real data in the programmable controller 10. The management file (c) stores the PC data information file (a) of the class, which is backed up, and a filename of the PC data file (b). The files (a), (b) and (c) are read by a file data reading part 7, and a transfer data creation part 8 creates and transfers the transfer data to a programmable controller 20. <P>COPYRIGHT: (C)2004,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device and method for backing up data in a programmable controller, and more particularly to backing up the data in the programmable controller being used in the operating state and transferring it to another programmable controller. Data backup device and method.

[0002]

2. Description of the Related Art When an abnormality occurs in a programmable controller used in the past, the same sequence program as that used in another programmable controller is transferred to another programmable controller using a loader. I was using it.

[0003]

DISCLOSURE OF THE INVENTION Problems to be Solved by the Invention As described above,
When the same operation as the programmable controller used is realized by another programmable controller, the sequence program used until then is transferred to another programmable controller and restored to the previous state.

However, when transferring the sequence program from the loader, compilation work is required, so that it may take a considerable time depending on the capacity of the program, and the compilation result may differ depending on the version of the loader. Therefore, there is a problem that there is no guarantee that the sequence program can be restored to the same state as when it was operating before transfer.

Further, in this conventional method, it is impossible to restore the data in the memory area in the programmable controller that has received the sequence program, and the state of the programmable controller becomes the initial state. Therefore, there is a problem in that the content of the memory area must be restored by a complicated manual work, and a considerable amount of time and labor must be spent to restore the content accurately.

Therefore, an object of the present invention is to make it possible to transfer the data in the programmable controller to another programmable controller while maintaining the operating state by a simple work by anyone. A backup device and method are provided.

[0007]

In order to achieve the above object, according to one aspect of the present invention, in a data backup device in a programmable controller, data of a sequence program is read from the programmable controller, and information regarding the read data is provided. First storage means for creating an information file and saving the information file and the data file of the read data; and second saving for creating and saving a management file including the file name of the information file and the read data. And a data backup device.

Here, when the means for reading the management file and the type of data to be transferred to another programmable controller according to the management file are further selected,
The information file and the data file may be read to create data to be transferred to the other programmable controller.

The information file includes a sequence program of the programmable controller and information about memory area data when the controller is operating,
The creating means may include means for processing the data file into a format that can be transferred to the other programmable controller according to the information file.

In order to achieve the above object, according to another aspect of the present invention, in a data backup method for saving / restoring data in a programmable controller, data of a sequence program is read from the programmable controller and information about the read data is provided. First step of creating the information file and saving the information file and the data file of the read data, and the second step of creating and saving a management file including the file name of the information file and the read data And a data backup method characterized by comprising:

Here, when the third step of reading the management file and the type of data to be transferred to another programmable controller according to the management file are selected, the information file and the data file are read, A fourth step of creating data to be transferred to the other programmable controller.

The information file includes a sequence program of the programmable controller and information about memory area data at the time of executing the first step, and the fourth step transfers the data file to the other programmable controller according to the information file. Processing to a possible format.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram schematically showing the function of one embodiment of the device of the present invention. In FIG. 1, reference numeral 10 is a programmable controller,
Reference numeral 20 indicates another programmable controller, such as a sequence program in the programmable controller 10 or other data (memory area data, etc.).
Is to be transferred to the programmable controller 20 for restoration while the operating state is held and backed up.

The backup device of this embodiment comprises a display unit 1, an input unit 2 and a device body 3, and the device body 3 is a CP.
It is provided with a processing unit such as U and a RAM, a ROM and the like (not shown), and is represented as a selection processing unit 4, a PC data reading unit 5, a file creating unit 6, a file data reading unit 7, and a transfer data creating unit 8. The function is configured to be executed in a procedure according to a flowchart described below.

That is, as will be described later in detail, the file creating unit 6 creates three types of files a, b, and c for backing up the data of the programmable controller 10.

The PC data information file a is a file for storing the type and size of the PC data read by the PC data reading unit 5. PC data file b
Is a file that stores actual data in the programmable controller 10. The management file c is a file for storing the file names of the backed up PC data information file a and PC data file b.

There is one management file c for each backup unit. PC data information file a and PC
There is one data file b for each data type of the programmable controller, and the file name differs for each data type.

The case of backing up the data in the programmable controller 10 will be described with reference to the flowchart of FIG.

First, in step S21, the type of data to be backed up is selected by the mode and file selection processing unit 4 for the data in the operating programmable controller 10. Step S
In step 22, the PC data reading unit 5 executes step S
The data of the type selected in 21 is read.

Next, in step S23, when the size and data type of the read programmable controller data is written in the PC data information file a, the process proceeds to step S24, and the data (sequence program or memory area) read from the programmable controller 10 is read. (Operating data) is written to the PC data file b.

Once the creation of the PC data information file a and the PC data file b is completed, step S25
In, the file name of the file created in steps S23 and S24 is written in the management file c.

Then, the process of step S26 is performed to determine whether the creation of the PC data information file a and the PC data file b has been completed for all the types of files of the type selected in step S21. If not completed, steps S22 to S26 are repeatedly executed. If file creation is completed for all types, the process is completed.

In this way, the data in the programmable controller 10 is saved as three files and backed up. The stored file is read and processed as described with reference to the flowchart of FIG. 3, and then transferred to the programmable controller 20.

In the flowchart of FIG. 3, first, in step S31, the file data reading unit 7 reads data from the management file c, and subsequently in step S32, the data to be transferred to the programmable controller 20 by the mode / file selection processing unit 4. Select the type of. The data type that can be selected here is step S
The data type is registered in the management file c read in step 31, and is selected and registered at the backup save time.

When the type of data to be transferred is selected, the process proceeds to step S33, and the data is read from the PC data information file a. Then, in step S34, the data is read from the PC data file b.

Once the reading of the file is completed, the process proceeds to step S35, and the PC data file b read in step S34 is transferred to the programmable controller 20 based on the information of the PC data information file a read in step S33. Process and restore. The processed data is transferred to the programmable controller 20 in step S36.

Then, the processing of step S37 is performed to judge whether the transfer data creation and the transfer to the programmable controller 20 have been completed for the file of the type selected in step S32. If not completed, steps S22 to S26 are repeatedly executed, and if the creation and transfer of transfer data for all the remaining selected types are completed, the process ends.

[0028]

As described above, according to the data backup device and method in the programmable controller of the present invention, the following effects can be obtained.

Even a beginner can easily perform the work of replacing the programmable controller while maintaining the operating state.

Since it is not necessary to compile the sequence program as compared with the replacement work using the loader, the time required to transfer the data to the programmable controller can be significantly shortened.

Since not only the sequence program but also various data stored in the memory area of the programmable controller are backed up in the operating state, the backed-up state of the programmable controller can be reproduced as it is in another programmable controller. it can.

[Brief description of drawings]

FIG. 1 is a block diagram schematically showing the function of an embodiment of a device of the present invention.

FIG. 2 is a flowchart showing a data backup procedure in a programmable controller according to the device and method of the present invention.

FIG. 3 is a flowchart showing a procedure for restoring / transferring backed up programmable controller data according to the device and method of the present invention.

[Explanation of symbols]

1 Display 2 Input section 3 device body 4 Mode and file selection processing section 5 PC data reading section 6 File creation department 7 File data reading section 8 Transfer data creation section 10, 20 Programmable controller a PC data information file b PC data file c management file

Claims (6)

[Claims] 1. A data backup device in a programmable controller, which reads data of a sequence program from a programmable controller, creates an information file about information about read data, and saves the information file and the data file of the read data. A data backup device comprising: a first storage unit that stores the information file and a second storage unit that creates and stores a management file including a file name of the information file and the read data. 2. The data backup device according to claim 1, further comprising means for reading the management file and selecting the type of data to be transferred to another programmable controller according to the management file, the information file. And a creation unit that reads the data file and creates data to be transferred to the other programmable controller. 3. The data backup device according to claim 2, wherein the information file includes a sequence program of a programmable controller and information about memory area data when the controller is operating, and the creating unit is configured to perform the operation according to the information file. A data backup device comprising means for processing a data file into a format that can be transferred to the other programmable controller. 4. A data backup method for saving / restoring data in a programmable controller, wherein data of a sequence program is read from a programmable controller, an information file for information about the read data is created, and the information file and the read data are read. A data backup method comprising: a first step of saving a data file of data; and a second step of creating and saving a management file including the information file and a file name of the read data. 5. The data backup method according to claim 4, further comprising: a third step of reading the management file, and selecting a type of data to be transferred to another programmable controller according to the management file. A fourth step of reading an information file and the data file and creating data to be transferred to the other programmable controller. 6. The data backup method according to claim 5, wherein the information file includes a sequence program of the programmable controller and information about memory area data at the time of executing the first step, and the fourth step follows the information file. A data backup method comprising processing the data file into a format that can be transferred to the other programmable controller.