JPH08278809A - Plant controller - Google Patents

Abstract

PURPOSE: To provide a plant controller which can improve the debug efficiency by changing the control parameter only when the coincidence of revision numbers is secured between a control part and a maintenance part and storing this changed parameter in both control and maintenance parts respectively in a debug mode. CONSTITUTION: A control parameter revision storage means 8 is added to a control part 1A to store the control parameter revision number of the control side. At the same time, a control parameter revision storage means 20 is added to a maintenance part 2A together with a decision means 21, a decision result display means 22 and a writing means 23. Then the control parameter is changed only when the coincidence of control parameter revision numbers is secured between both parts 1A and 2A. The part 2A has a function to change the contents of a control parameter store means 13 only at the maintenance side, and the part 1A has a function to change the contents of its control parameter store means 5 only through the maintenance of the part 2A. Thus it is not required to perform a complicated collation job to decide the coincidence or non-coincidence of control parameters between both parts 1A and 2A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plant control apparatus comprising a control section for monitoring and controlling a plant and a maintenance section for maintaining the control section, and more particularly, to a control program execution. The present invention relates to a plant control device suitable for maintenance of control parameters.

[0002]

2. Description of the Related Art FIG. 12 is a block diagram of a conventional plant control apparatus.

In the figure, the plant control device is roughly divided into a control unit 1 and a maintenance unit 2. The control unit 1 comprises a main control means 3, a control program storage means 4, a control parameter storage means 5, an external input means 6 and a transmission means 7.

The maintenance section 2 comprises a control means 11, a control program storage means 12, a control parameter storage means 13, a display means 14, an input / output means 15 and a transmission means 16.

Then, the transmission means 7 of the control unit 1 and the maintenance unit 2
The transmission means 16 is connected by a transmission line 17.

In the figure, the main control means 3 of the control unit 1 is
An arithmetic processing function is provided, arithmetic processing is executed using the plant data and the control parameters of the control parameter storage means 5 according to the control program of the control program storage means 4, and the calculation result is sent to the plant via the external input means 6. Output. The control program storage means 4 stores a control program created by the maintenance unit 2 described later. The control parameter storage means 5 stores control parameters. The external input means 6 is an interface that takes in plant data and outputs the data to the plant.

Further, the control means 11 of the maintenance section 2 creates a control program by the interactive processing of the operator through the display means 14 and the input / output means 15, sets control parameters, and monitors the result of the simulation calculation. Change the created control program.

The control program storage means 12 is a control unit 1.
The control program storing means 4 has substantially the same configuration as the control program storing means 4 and stores the control program created by the maintenance unit 2. The control parameter storage means 13 has substantially the same configuration as the control unit 1 and stores the control parameter set by the maintenance unit 2.

The display means 14 displays various data on a CRT or the like, and the input / output means 15 is used by the operator to input various information. The transmission means 16 is for data transmission with the transmission means 7 of the control unit 1.

First, in the maintenance unit 2, the operator interactively processes the display means 14 and the input / output means 15, the control means 11 sequentially creates a control program, and the created control program is stored in the control program storage means 12. Is stored. Further, the control parameter is set by the interactive process of the operator and sequentially stored in the control parameter storage means 13 via the control means 11.

Once all the control programs have been created and stored in the control program storage means 12, the control programs are transmitted from the transmission means 16 to the transmission means 7 of the control unit 1 via the transmission path 17. Further, once all the control parameters have been set and stored in the control parameter storage means 13, they are transmitted from the transmission means 16 to the transmission means 7 of the control unit 1 via the transmission path 17.

In the control unit 1, the main control unit 3 stores the control program transmitted from the maintenance unit 2 in the control program storage unit 4, and further stores the control parameters in the control parameter storage unit 5.

Next, the control program is debugged.

The debug of the created control program is
The main control means 3 sequentially takes out the control programs stored in the control program storage means 4, fetches the control parameters from the control parameter storage means 5 by the instruction code, executes the simulation calculation processing, and confirms the calculation results. In this case, when the calculation result is not what was intended, the control parameter of the control parameter storage means 5 is repeatedly executed so that the debugee can change the control parameter to obtain the intended calculation result.

[0015]

However, the above-described plant control apparatus shown in FIG. 12 has a problem that debugging requires a lot of troublesome work and a lot of time, and the efficiency is extremely poor.

First, there is a problem that work efficiency is poor because it is not known which control parameter has been changed by debugging.

Conventionally, when the control program is debugged in the control unit 1 and a control parameter of a certain part is changed, the debugee leaves a memo and the like with the number of the changed control parameter and the values before and after the change. After that, the debugging person has done the work of matching the corresponding control parameter of the control parameter storage means 13 of the maintenance unit 2 with the control parameter storage means 5, and completed the debugging work of a certain part.

Next, when debugging is restarted, first, the debugging is restarted after the work of confirming that the control parameters of the control parameter storing means 13 to be debugged and the control parameters of the control parameter storing means 5 match. Was.

In general, the debugging of the control program may be carried out for several months to half a year, and a large number of debugees participate and take charge of each part of the control program.
Sometimes the person in charge changes in the middle of the process, and the control unit 1
It is difficult to make the control parameters of 1 and the corresponding control parameters of the maintenance unit 2 always match.

If there is a mismatch in the control parameters,
If there is no change memo, it is necessary to judge whether or not the control parameter of the control parameter storage means 5 including the relevant part is debugged for each number, and the debug is performed again. I had to start over.

Secondly, depending on the result of debugging the control parameter, it may be desired to restore the control parameter before the change. In this case, there is a problem that it is difficult to surely restore the data although it is changed by a change memo or the like, and it takes a lot of time for that.

Therefore, it is an object of the present invention to provide a plant control device for easily and efficiently debugging a control program.

[0023]

According to a first aspect of the present invention, there is provided a control program storing means on the control side for storing a control program in a control language for arithmetic processing, and a control parameter used when executing the processing of the control program. It is obtained by executing the processing of the control program by using the control parameter storage means on the control side for storing and the plant data, and the external input means for outputting the calculation processing result to the plant, and the plant data and the control parameters. Main control means for outputting the arithmetic processing result to the plant through the external input means,
A control unit having a control side transmission means for transmitting data for maintenance of a control program and control parameters, and a maintenance side control program for storing a control program provided corresponding to the control side control program storage means A storage means, a control parameter storage means for storing control parameters provided corresponding to the control parameter storage means on the control side, and a control program created by interactive processing and stored in the control program storage means on the maintenance side. , Control means for setting the control parameters and storing them in the control parameter storage means on the maintenance side, and changing the control program or the set control parameters, and the created control program or the set control parameters via the transmission line. A plant comprising a maintenance unit having a transmission unit on the maintenance side for transmitting to the transmission unit of the control unit In the control device, the control unit has a control parameter revision storage unit for storing the control parameter revision number of the control side, while the maintenance unit has a control parameter revision of the maintenance side for storing the control parameter revision number of the maintenance side. When changing the control parameter, the storage means and the control parameter revision number on the control side are read from the control parameter revision number on the control side, and compared with the control parameter revision number on the maintenance side to determine whether they match or do not match. Judgment and display the judgment result on the control parameter revision judgment result display means and the control parameter revision judgment means and the judgment by this control parameter revision judgment means match the desired control parameter on the control side of the control unit. When writing to the parameter storage means Further, the control parameter revision number is updated and the updated control parameter revision number is stored in the control parameter revision storage means on the maintenance side and the control parameter revision storage means on the control side. A control parameter revision writing means is provided.

According to a second aspect of the present invention, in the plant control apparatus according to the first aspect, the simulation calculation of the control program is executed only when the determination result by the control parameter revision determining means is coincident, but the determination result is not coincident. At this time, a prohibition means for prohibiting the simulation calculation of the control program is added.

According to a third aspect of the present invention, a control program storage means on the control side for storing a control program in a control language for arithmetic processing, and a control on the control side for storing control parameters used when executing the processing of the control program. While inputting the parameter storage means and the plant data, external input means for outputting the calculation processing result to the plant, and the calculation processing result obtained by executing the processing of the control program using the plant data and the control parameter. Corresponding to the control unit having the main control means for outputting to the plant through the means, the control side transmission means for transmitting data for maintenance of the control program and control parameters, and the control side control program storage means. Control program storage means for storing the control program provided in the Maintenance side control parameter storage means for storing control parameters provided corresponding to the storage means, and a control program is created and stored in the maintenance side control program storage means, control parameters are set and maintenance side control parameters are set. Control means for storing the control program in the storage means and changing the control program or the set control parameter, and transmitting the maintenance program for transmitting the created control program or the set control parameter to the transmission means of the control unit via the transmission path. In the plant control device including a maintenance unit having means, the control unit is provided with a control-side control parameter revision storage unit that stores the control-side control parameter revision number, while the maintenance unit includes the control-parameter revision number and the control parameter revision number. Changes that store change history data including parameter numbers and control parameters before and after updating The history data storage means and the control parameter revision number are updated when the control parameter is changed and stored in the change history data storage means and the control parameter revision storage means on the control side, and the contents of the change history data storage means are changed. Change means for storing the history data and writing the changed control parameters to the control parameter storage means on the maintenance side and the control parameter storage means on the control side, and for restoring the desired past changed control parameters A control parameter restoring means for extracting control parameters from the change history data in the change history data storage means according to the request data and writing the control parameters in the maintenance side control parameter storage means and the control side control parameter storage means. It is provided.

According to a fourth aspect of the present invention, in the plant control apparatus according to the third aspect, a control parameter change history list display for searching the change history data storage means and extracting and displaying the change history data corresponding to the restoration request data is displayed. Means are added.

[0027]

According to the plant control apparatus of the first aspect, when debugging, it is displayed whether the revision numbers of the control unit and the maintenance unit match. The control parameters can be changed only when the two match, and the same changed control parameters are stored in the control parameter storage unit of the control unit and the control parameter storage unit of the maintenance unit. This allows
It is not necessary to always perform a complicated inquiry work as to whether or not the control parameters of the control unit and the maintenance unit match each other, and the debugging efficiency is greatly improved.

According to the plant control device of the second aspect, when debugging, whether the revision numbers of the control unit and the maintenance unit match or not is displayed, and the simulation calculation is executed only when both of them match. To be done. As a result, it is possible to avoid performing a simulated calculation due to an erroneous control parameter.
The efficiency of debugging work is improved without having to execute debugging again.

According to the plant control device of the third aspect, when the control parameter is changed, the control parameter revision number is updated and stored in the control parameter revision storage means of the control section and the change history data storage means of the maintenance section. On the other hand, the contents of the change are recorded in the change history data storage means and further written in the control parameter storage means on the maintenance side and the control parameter storage means on the control side. Next, when the restoration request data is input, the control parameters corresponding to the restoration request data are extracted and stored in the control parameter storage means on the maintenance side and the control parameter storage means on the control side to be restored. As a result, the troublesome work of restoring the past control parameters due to the change memo or the like is unnecessary, and the restoration can be surely performed.

According to the plant control device of the fourth aspect, the change history data corresponding to the restoration request data is extracted and displayed on the control parameter change history list display means. As a result, it is possible to reliably know the desired past control parameters including the control parameters. Therefore, it is not necessary to perform an inconvenient restoration work by relying on the change memo or the like and taking a troublesome work.

[0031]

Embodiments of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram of a control unit of a plant control system showing a first embodiment of the present invention. FIG. 2 is a configuration diagram of the maintenance unit of the plant control device.

1 and 2 show the conventional example, the same reference numerals as in FIG. 12 indicate the same or corresponding portions, and the main difference is that the control parameter revision storage means 8 is provided in the control unit 1A shown in FIG. 2 is additionally provided with a control parameter revision storage means 20, a control parameter revision determination means 21, a control parameter revision determination result display means 22 and a control parameter revision writing means 23 in the maintenance section 2A shown in FIG. Control unit 1A and maintenance unit 2A
The control parameters are changed only when the control parameter revision numbers of and match.

The maintenance section 2A has a function of changing the contents of the control parameter storage means 13 only on the maintenance side.
The control unit 1A has a function of changing the contents of the control parameter storage means 5 of the control unit 1A only by maintenance from the maintenance unit 2A.

Here, the control parameter revision storage means 8 of the controller 1A stores the control parameter revision number on the control side.

The control parameter revision storage means 20 of the maintenance section 2A stores the control parameter revision number on the maintenance side. When changing the control parameter, the control parameter revision determining unit 21 reads the control parameter revision number of the control side from the control parameter revision storage unit 8 of the control side, compares it with the control parameter revision number of the maintenance side, and compares the two. It is for determining whether or not they match, and displaying the determination result.

Control parameter revision writing means 23
Writes the desired control parameters to the control parameter storage means 5 on the control side of the control unit 1 and writes them to the control parameter storage means 13 on the maintenance side only when the determinations by the control parameter revision determining means 21 match. Further, the control parameter revision number is updated and the updated control parameter revision number is stored in the control parameter revision storage means 20 on the maintenance side and the control parameter revision storage means 8 on the control side.

Next, the processing of the maintenance unit 2A when changing the control parameters stored in the control parameter storage means 13 of the control unit 1 will be described with reference to FIG.

First, the control parameter revision judging means 21 of the maintenance section 2A reads the control parameter revision number of the control parameter revision storing means 8 of the control section 1A via the transmission line 17 (S10). And maintenance department 2A
The control parameter revision deciding means 21 reads the control parameter revision number of the control parameter revision storing means 20 and decides whether or not both control parameter revision numbers match (S11).

If both the control parameter revision numbers match in this determination, the control parameter input means 15 waits for the input of the control parameter, and the control parameter storage means 13 of the control section 1A is written (S12, S13). Further, similarly, the control parameters are written in the control parameter storage means 13 of the maintenance unit 2A (S14).

After that, the control parameter revision number is updated and counted up (S15). Along with this, the control parameter revision writing means 23 causes the control unit 1 to
The updated control parameter revision number is written in the control parameter revision storage means 8 of A (S16). Then, the updated control parameter revision number is written in the control parameter revision storage means 20 of the maintenance unit 2A (S17).

On the other hand, when the control parameter revision determining means 21 determines that both control parameter revision numbers do not match, the control parameter revision determining means 21 outputs a message indicating the mismatch to the control parameter revision determination result displaying means 22 (S18). ).

For example, as shown in FIG. 3, the content of the control parameter storage means 13 may be changed only by the maintenance section 2A by another process. In such a case, the control parameter revision writing means 23 controls the control parameters. Only the revision number in the revision storage means 20 is incremented, but the control parameter revision number in the control parameter revision storage means 8 does not change. This causes a mismatch with the control parameter revision number of the control parameter revision storage unit 8 of the control unit 1A, and the control parameter contents of the control parameter storage unit 5 and the control parameter storage unit 13 are different.

As described above, according to the first embodiment, when debugging, it is displayed whether the revision numbers of the control unit 1A and the maintenance unit 2A match. The control parameters can be changed only when the two match, and the same changed control parameters are stored in the control parameter storage unit 5 of the control unit 1A and the control parameter storage unit 13 of the maintenance unit 2A. As a result, it is not always necessary to perform a complicated inquiry work as to whether or not the control parameters of the control unit 1A and the maintenance unit 2A match each other, and the debugging efficiency is greatly improved.

Next, a second embodiment of the present invention will be described.

FIG. 4 is a block diagram of the maintenance unit showing the second embodiment of the present invention.

The same reference numerals as those in FIG. 12 showing the conventional example in FIG.
The maintenance unit 2B of FIG.
The main difference from 2 is that a control parameter revision storage means 20, a control parameter revision determination means 21, a control parameter revision determination result display means 22 and a control program monitor prohibition means 30 are additionally provided, and the maintenance section of the first embodiment is added. Control program monitor prohibiting means 30 is added to 2A to form a maintenance section 2B, and the control section 1A monitors (simulates calculation) only when the revision numbers of the control section 1A and the maintenance section 2B match. Is.

In the second embodiment, the control unit 1A shown in FIG. 1 used in the first embodiment is applied as it is, and is used by being connected to the maintenance unit 2B shown in FIG.

Here, the control parameter revision storage means 20 of the maintenance section 2B stores the control parameter revision number on the maintenance side. At the time of monitoring, the control parameter revision determining unit 21 reads the control parameter revision number of the control side from the control parameter revision storage unit 8 of the control side, compares it with the control parameter revision number of the maintenance side, and matches or does not match the two. Is determined and the determination result is displayed.

The control program monitor prohibiting means 30 executes the simulation calculation of the control program when the judgment result by the control parameter revision judging means 21 is coincident or at the request of the operator, while the judgment result is not coincident. At this time, the simulation of the control program is prohibited.

Next, the operation of the second embodiment will be described with reference to FIG.

First, the control parameter revision determining means 21 reads the control parameter revision number of the control parameter revision storing means 8 of the control section 1A shown in FIG. 1 (S20). Then, the control parameter revision determining means 21 reads the control parameter revision number from the control parameter revision storing means 20 and determines whether or not both control parameter revision numbers match (S21). If both of the control parameter revision numbers match in this determination, a predetermined control program is monitored (simulated calculation execution) (S22).

On the other hand, when both the control parameter revision numbers do not match in the judgment of the control parameter revision judging means 21, the control parameter revision judgment result displaying means 2
A message to the effect that there is a mismatch is displayed in step 2 (S2
3). Along with the display of this message, a signal indicating that they do not match is input to the control program monitor prohibiting means 30.

Here, when the operator intentionally monitors the control program (executes a simulated operation), the control program monitor prohibiting means 30 monitors (simulates an executed operation) by interactive processing, while the control program monitors (simulated operation) by an interactive processing. When the calculation is not performed), the process ends as it is (S24).

As described above, according to the second embodiment, when debugging, whether or not the control parameter revision numbers of the control unit 1A and the maintenance unit 2A match is displayed, and only when both match. Simulated calculation is executed. As a result, it is possible to avoid performing a simulated calculation due to an erroneous control parameter. The efficiency of debugging work is improved without having to execute debugging again.

Next, a third embodiment of the present invention will be described.

FIG. 6 is a block diagram of a maintenance section showing a third embodiment of the present invention. The same reference numerals as those in FIG. 12 showing a conventional example indicate the same or corresponding portions, and the main points of difference between the two are as follows. ,
This means that the control parameter revision writing means 23, the control parameter restoring means 40, the change history data storage means 41, and the changing means 42 are additionally provided. Further, in the third embodiment, it is used by being connected to the control unit 1A shown in FIG.

Here, the change history data storage means 41 of the maintenance section 2C stores change history data including the control parameter revision number, the control parameter number, and the control parameters before and after the update. The changing unit 42 updates the control parameter revision number when the control parameter is changed, stores the control parameter revision number in the change history data storage unit 41 and the control-side control parameter revision storage unit 8, and changes the change history data storage unit 41. The history data is stored, and the changed control parameters are stored in the control parameter storage means 13 on the maintenance side and the control parameter storage means 5 on the control side.
To write to.

The control parameter restoring means 40 extracts the control parameter from the change history data in the change history data storage means 41 according to the restoration request data for restoring the desired past changed control parameter, and the control parameter on the maintenance side. The data is written in the storage means 13 and the control-side control parameter storage means 5.

Next, the operation of the third embodiment will be described.

First, when the control parameter is changed, the control parameter revision number is updated by the processing of the control parameter revision writing means 23 and written in the change history data storage means 41 and the control parameter revision storage means 8 of the control section 1A. Be done. Further, by the processing of the changing means 42, the changed control parameters are stored in the change history data storage means 41 as the change history data, and the changed control parameters are written to the control parameter storage means 13 of the maintenance section 2C and the control parameter storage means 5 of the control section 1A. Get caught.

Here, the control parameter restoration process will be described with reference to FIG.

First, the restoration condition is input by the interactive process of the operator. As this restoration condition, necessary items such as time, changer, and control parameter revision number are set and input (S30). In response to this, the control parameter restoration means 40 reads the contents of the change history data storage means 41 shown in FIG. 8 and extracts the change history data corresponding to the restoration conditions (S31).

The change history data storage means 41 has a circulation flag, a latest revision number and a latest change history storage block number in the header section, and each block (1) to (n) has a revision number and a setting. The data number, the data before the change, the data after the change, the comment, the changer, the year, month, day, hour, minute, second are stored. The circulation flag is set to "1" when data is set in all the blocks (1) to (n), and the oldest block (i) is overwritten.

Next, in the control parameter restoring means 40,
The block (i) of the change history data in the change history data storage unit 41 is taken out, and it is sequentially judged whether or not the restoration conditions are met, and the control parameters are stored in the control parameter storage unit 5 of the control unit 1A according to the changed change history data. Write (S
33). At this time, the written control parameters are temporarily stored in the restoration log (S34).

The above processing is checked for all the change history data in the change history data storage means 41, and when all of them are completed, the next processing is carried out (S35).

Next, the control parameter revision number is updated, and the updated latest control parameter revision number is written in the control parameter revision storage means 8 of the control section 1A (S37). Similarly, the same control parameter revision number is written in the change history data storage means 41 of the maintenance unit 2A (S38). Further, the contents of the change history data storage unit 41 are changed so as to be the change history data after the restoration according to the currently saved restoration log (S).
39).

As described above, according to the third embodiment, when the control parameter is changed, the control parameter revision number is updated and the control parameter revision storage means 8 of the control section 1A and the change history data storage means 41 of the maintenance section 2C are updated. And the change contents are stored in the change history data storage means 4.
1 and is written in the control parameter storage means 13 and the control parameter storage means 5. Next, when the restoration request data is input, a control parameter corresponding to the restoration request data is extracted, stored in the control parameter storage means 13 and the control parameter storage means 5, and restored. As a result, the troublesome work of restoring the past control parameters due to the change memo or the like is unnecessary, and the restoration can be surely performed.

Next, a fourth embodiment of the present invention will be described.

FIG. 9 is a block diagram of the maintenance unit applied to the fourth embodiment of the present invention. The same reference numerals as those in FIG. 12 showing the conventional example indicate the same or corresponding portions, and the main difference between them is shown. The point is that the change history data storage means 41 and the control parameter change history list display means 50 are additionally provided. Further, in the fourth embodiment, the maintenance unit 2D is connected to the control unit 1A of the first embodiment shown in FIG. 1 by the transmission line 17.

Control parameter change history list display means 50
Is for searching the change history data storage means 41 and extracting and displaying the change history data corresponding to the restoration request data.

Next, a case of executing change history list display will be described with reference to FIG.

First, the display condition data as the restoration request data is input by the interactive process of the operator (S4).
0). For example, at this time, the control parameter revision number, the time, and the data of the changer are input.

Next, the control parameter change history list display means 50 reads the change history data from the change history data storage means 41 shown in FIG. 8 (S41). Then, the display condition data is compared with the change history data, and only when they match, the change history data is fetched (S43). When all the change history data are determined, the change history list requested to be displayed is displayed as in the display example shown in FIG.

In FIG. 11, the setting data before and after changing the setting data number for each revision number, the comment, the changer, and the change date and time are displayed.

As described above, according to the fourth embodiment, the change history data corresponding to the restoration request data is extracted and displayed on the control parameter change history list display means 50. As a result, it is possible to reliably know the desired past control parameters including the control parameters. Therefore, it is not necessary to perform an inconvenient restoration work by relying on the change memo or the like and taking a troublesome work.

[0077]

As described above, according to the invention of claim 1, it is displayed whether or not the control parameter revision numbers of the control unit and the maintenance unit match, and the control parameter is changed only when they match. Since it is possible to do so, it is not always necessary to perform a complicated inquiry work as to whether or not the control parameters of the control unit and the maintenance unit match each other, and the debugging efficiency is greatly improved.

According to the second aspect of the present invention, it is displayed whether or not the control parameter revision numbers of the control unit and the maintenance unit match, and the simulated calculation is executed only when both match. It is possible to avoid performing a simulated calculation due to an erroneous control parameter, and to improve the efficiency of debugging work without executing the debugging again.

According to the third aspect of the present invention, since the change history of the control parameters is stored and the control parameters are restored by the restoration request data, the troublesome trouble of restoring the past control parameters by the change memo or the like is unnecessary. Next to
Also, it can be surely restored.

According to the invention of claim 4, since the change history data corresponding to the restoration request data is extracted and the control parameter change history list is displayed, the desired past control parameters including the control parameters are displayed. It is possible to know for sure, and it is no longer necessary to perform troublesome restoration work by relying on change memos.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a control unit of a plant control device showing a first embodiment of the present invention.

FIG. 2 is a configuration diagram of a maintenance unit in FIG.

FIG. 3 is a flowchart showing a processing procedure of a maintenance unit in FIG.

FIG. 4 is a configuration diagram of a maintenance unit of a plant control device showing a second embodiment of the present invention.

5 is a flowchart showing a processing procedure of a maintenance unit in FIG.

FIG. 6 is a configuration diagram of a maintenance unit of a plant control device showing a third embodiment of the present invention.

FIG. 7 is a flowchart showing a processing procedure of a maintenance unit in FIG.

8 is a block diagram showing the contents of a change history data storage unit in FIG.

FIG. 9 is a configuration diagram of a maintenance unit of a plant control device showing a fourth embodiment of the present invention.

FIG. 10 is a flowchart showing a processing procedure of a maintenance unit in FIG.

11 is a display example displayed by a control parameter change history list display unit of FIG.

FIG. 12 is a configuration diagram of a plant control device showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 control part 2 maintenance part 3 main control means 4 control program storage means 5 control parameter storage means 6 external input means 7 transmission means 8 control parameter revision storage means 11 control means 12 control program storage means 13 control parameter storage means 14 display means 15 Input / output means 16 Transmission means 17 Transmission path 20 Control parameter revision storage means 21 Control parameter revision determination means 22 Control parameter revision determination result display means 23 Control parameter revision writing means 30 Control program monitor prohibition means 40 Control parameter restoration means 41 Change history Data storage means 42 Change means 50 Control parameter change history list display means

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display location G05B 23/02 302 7531-3H G05B 23/02 302K 7531-3H 302M 19/05 19/05 F

Claims (4)

[Claims] 1. A control-side control program storage means for storing a control program in a control language for arithmetic processing, and a control-side control parameter storage means for storing control parameters used when executing the processing of the control program. While inputting plant data, external input means for outputting an arithmetic processing result to a plant and an arithmetic processing result obtained by executing processing of the control program using the plant data and the control parameter are externally input. A control unit having a main control means for outputting to the plant via means, and a transmission means on the control side for data transmission for maintenance of the control program and control parameters,
The control program storage means on the maintenance side for storing the control program provided corresponding to the control program storage means on the control side, and the maintenance side for storing the control parameter provided corresponding to the control parameter storage means on the control side Control parameter storage means and the control program created by interactive processing are stored in the control program storage means on the maintenance side, and the control parameters are set and stored in the control parameter storage means on the maintenance side. And maintenance means for changing the set control parameter, and maintenance-side transmission means for transmitting the created control program and the set control parameter to the transmission means of the control unit via a transmission path. And a control parameter revision on the control side. While the control side control parameter revision storage means for storing the number is provided, the maintenance section is a maintenance side control parameter revision storage means for storing the maintenance side control parameter revision number, and when changing the control parameter, The control parameter revision number of the control side is read from the control parameter revision storage means of the control side, compared with the control parameter revision number of the maintenance side, it is determined whether they match or not, and the determination result is the control parameter revision determination. Only when the control parameter revision determination means displayed on the result display means and the determination by this control parameter revision determination means are coincident with each other, the desired control parameter is written into the control parameter storage means on the control side of the control section, and maintenance is performed. To control parameter storage means In addition, the control parameter revision number is updated, and the updated control parameter revision number is stored in the control parameter revision storage means on the maintenance side and the control parameter revision writing means for storing the control parameter revision number on the control side revision parameter storage means. A plant control device characterized by being provided. 2. The prohibition means for executing the simulation calculation of the control program only when the judgment result by the control parameter revision judging means is coincident, and prohibiting the simulation calculation for the control program when the judgment result is not coincident. 2. The plant control device according to claim 1, further comprising: 3. A control-side control program storage means for storing a control program in a control language for arithmetic processing, and a control-side control parameter storage means for storing control parameters used when processing the control program. While inputting plant data, external input means for outputting an arithmetic processing result to a plant and an arithmetic processing result obtained by executing processing of the control program using the plant data and the control parameter are externally input. A control unit having a main control means for outputting to the plant via means, and a transmission means on the control side for data transmission for maintenance of the control program and control parameters,
The control program storage means on the maintenance side for storing the control program provided corresponding to the control program storage means on the control side, and the maintenance side for storing the control parameter provided corresponding to the control parameter storage means on the control side Control parameter storage means and the control program is created and stored in the control program storage means on the maintenance side, the control parameters are set and stored in the control parameter storage means on the maintenance side, and the control program and settings are made. And a maintenance unit having a maintenance-side transmission unit that transmits the created control program and the set control parameters to the transmission unit of the control unit via a transmission path. In the plant control apparatus, the control unit stores the control parameter revision number on the control side. While the control side control parameter revision storage means is provided, the maintenance section stores a change history data storage means for storing change history data including a control parameter revision number, a control parameter number, and control parameters before and after updating, and a control parameter change. When there is, the control parameter revision number is updated and stored in the change history data storage means and the control-side control parameter revision storage means, and the change history data is stored in the change history data storage means, and the changed control Change means for writing parameters into the control parameter storage means on the maintenance side and the control parameter storage means on the control side, and the change history data storage means by means of restoration request data for restoring the control parameters changed in the past in the past. Extract control parameters from change history data, Plant control apparatus characterized by the control parameter storage means Mamoru side and the control side of the control parameter storage means providing a control parameter restoring means for restoring the write desired control parameters. 4. The control parameter change history list display means for searching the change history data storage means and extracting and displaying the change history data corresponding to the restoration request data is added. Plant control equipment.