JPH05324304A - Method and device for correcting control program - Google Patents

Abstract

PURPOSE:To efficiently perform adjustment for plant control by displaying an operation bill document inputted to a program generator on a CRT, and quickly and simply changing a control constant required for the plant control. CONSTITUTION:In a control system comprised of the program generator 8, the CRT 1 which monitors a plant, a plant controller 4, and a network 9 which links them, a function to display an operation bill and to designate the control constant to be changed on the operation bill and to input the control bill newly is attached on the CRT 1, and the one to generate the control constant shown on the operation bill and index information in accordance with a load module simultaneously when the program is generated and to transfer them to the plant controller 4 when a down load operation is performed on the program generator 8, and the one to fetch a preset value from the CRT 1 and to directly reload a load module by using the index information received in the down load operation and to change the constant on the plant controller 4.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a plant controller program correction method and apparatus for controlling a plant in the field of plant control.

[0002]

2. Description of the Related Art In a conventional plant control system,
Before the program generator automatically generated the load module from the driving bill document,
The plant control program has been created and loaded by a dedicated tool corresponding to the plant controller. Even during the trial run and adjustments that are carried out before the plant is built and the plant is in operation, the load module is displayed in the form of a ladder diagram using a dedicated tool that is directly connected to this plant controller, and this tool is used to find changes. , It was fixed. After that, a load module is automatically created from the program creation device, and in this case, even if it can be monitored in the form of an operating bill, the control constants are embedded in the load module and When changing the constants, I had no choice but to rely on a dedicated tool. Further, what is displayed on the dedicated tool is represented by a ladder diagram or the like that is far from the driving bill, so that it is difficult to associate the driving bill with the load module. As a method of avoiding this, there is a method of preparing a screen for changing the constant on the CRT and changing the screen for the control constant that is frequently changed. According to this method, it is necessary to create a dedicated CRT screen for each application (every time the site changes), and the control logic is changed (for example, the control method is changed, and control constants are added or deleted). ) Occurs, this C
There was a problem that the RT screen also had to be corrected.

[0003]

The problem that arises when the program created from the operation bill by the program creating device is actually applied to the plant and operated is the problem of adjustment. That is, the condition of the plant can be monitored in the form of an operating bill on the CRT by the monitor function of the program creation device, and therefore there is no problem. However, by the time the actual operation of the plant begins
Make adjustments. In the trial run, the control constant must be changed and adjusted while actually moving the controlled object.
For example, in the case of a steel plant, the steel material to be rolled is actually rolled and the gain and time constant are adjusted. It is possible to make this change on the operation plan document of the program creation device, regenerate the load module by the program creation function, and download it to change the constants, but this is not practical for the following reasons. .. (1) Time Problem for Changing Constants Since the program creation device generates the load module from the driving bill document, it has to analyze the document and convert it into a machine language, which takes time to process.
Considering that adjustment is performed while actually operating the line during adjustment, it cannot withstand actual operation. (2) It is difficult to stop the line due to the constant change. If the download is performed each time the constant is changed, the CPU of the plant controller will be downloaded (that is, the load module in the plant controller will be replaced).
Must be stopped once. This causes the plant line to be stopped each time, and the adjustment efficiency is significantly reduced. It may not be possible depending on the type of adjustment. (3) Usability problem of changing constants If the program creation device is modified, the program creation devices must be installed side by side at the same location as the CRT that monitors the plant, and two devices must be operated during adjustment. .. Therefore, the efficiency of changing the constant is significantly hindered. In view of the above-mentioned circumstances, an object of the present invention is to display a driving plan document input to a program creating device at the time of creating a program, and a control program correction method suitable for quickly and simply changing a control constant necessary for plant control, and To provide a device.

[0004]

SUMMARY OF THE INVENTION The above-mentioned object is to provide a program creating device and an operation monitoring device (C) for monitoring a plant.
It includes display means such as RT. (Hereinafter, a CRT will be described as a representative), a plant controller that controls a plant, and a control system that includes a network that links these plants.
While displaying the operating bill and monitoring the plant status, specify the control constants to be changed in the operating bill, enter the control constants from the keyboard attached to the CRT, specify the other party and send it to the network. In addition, the program creation device has the function of simultaneously creating the control constants appearing in the operating bill and the corresponding index information of the load module when creating the program and transferring this to the plant controller when downloading. Also, the plant controller takes in the set values from the CRT, directly rewrites the load module by using the correspondence between the control constants in the operation plan received at the time of download and the load module, and changes the constant almost instantaneously. It is achieved by having.

[0005]

In the CRT, the operating bill is displayed on the screen, the operator monitors the state of the plant, and at the same time, the operator's input is accepted and the control constant is designated (for example, a finger touches a position where the constant is present on the screen). ), The control constant input mode is entered, the changed value is read, and the change request and its value are sent to the plant controller. At the time of downloading, the plant controller changes the control constant when the idle time of the control program is detected based on the correspondence data between the load module and the control constant in the operation plan received from the program creating device. The result is reflected on the CRT display of the request source and also on the load module in the program creating apparatus. As a result, it becomes possible to change the plant control constants immediately and easily while monitoring the operation plan from the CRT, and the efficiency of plant control adjustment can be improved.

[0006]

EXAMPLES Examples of the present invention will be described below. Figure 1
1 shows an overall configuration of an embodiment of the present invention. In FIG. 1, 1 is a CRT display for actually displaying the screen, and 2 is a CRT.
A keyboard for inputting set values from the display 1 and designating a driving bill to be monitored, 3 is a keyboard 2, C
A CRT controller that manages input / output between the RT display 1 and the network 9. Hereinafter, the CRT display 1, the keyboard 2, and the CRT controller 3 are collectively referred to as CRT0. The operator monitors the plant (not shown) from this CRT 0 and operates the plant. Further, this CRT0 is a program creation device 8
It has a function to display and monitor documents created in (described later). Further, 4 is a plant controller for actually controlling the plant, and in the figure, only the constituent parts on software related to the present invention are shown therein. 5 is a load module that is the main body of the plant control program, 6 is the
A management program that receives the load module and management data from the program creation device 8 and also receives the request for constant change, rewrites the constant, and sends the result, and 7 is the correspondence data between the constant and the load module in the operating plan (Hereinafter referred to as index information). Reference numeral 8 denotes a program creating device, which includes a keyboard 10, a display 11 for displaying, a processing device 12, and a customization module stacker 13. The program creation device 8 has a function of analyzing the operating bill document input from the keyboard 10 and the display 11 and creating the load module 14 of the plant controller 4. Here, the operation bill represents the processing function of the entire plant. Since a plant is normally operated by a plurality of plant controllers 4, the operation bill is divided into plant controller 4 units, and each is a set of modules that realize a specific function. This module group is stored in the customized module stacker 13, and the processing device 12 creates a load module 14 and monitor information 15 for controlling the plant from the contents of the customized module stacker 13. The load module 14 is downloaded from the program creating device 8 to the plant controller 4. Also, 9
Is a network, which is a transmission path for linking the CRT 0, the plant controller 4, and the program creation device 8 described above. Actually, (1) linkage of control information between the plant controllers 4, (2) transmission of an operation command from the CRT 0 to each plant controller 4,
(3) The plant controller 4 transmits information about the plant to the CRT 0, and (4) the operation bill input to the program creation device 8 is transmitted to the CRT 0. This allows
It is possible to monitor the condition of the plant. Here, as described above, the load module 14 that moves the plant is created in the program creation device 8.
The operation of the plant is started by downloading the load module 14 created in the program creating apparatus 8 to the plant controller 4 and executing the load module 14, and thereafter, the plant is operated by the plant controller 4, the CRT 0, and the network 9. On the other hand, the operator monitors the plant by the CRT display 1, judges the state of the plant through the CRT display 1, and switches the operation mode or changes the setting by using the keyboard 2 of the CRT 0 as necessary. The operation performed by the operator is transmitted to the plant controller 4 through the network 9, and the plant controller 4 switches modes and changes settings. Note that the program creation device 8 is not related to the operation in the operating plant.

Next, as a preparation for changing the control constant, the creation of index information in the program creating device 8 will be described. As shown in FIG. 2, the operation bill is managed in units of modules for each function,
Each module has a consistent NO called the seat number (SH.NO). A module is composed of multiple pages and has pages within the module.
Any page of the driving bill is SH. It can be uniquely determined by the combination of NO and page. In the example of the figure, the SH. It is assumed that NO is 057 and page is 02. FIG. 2A shows a part of one page of the driving bill, and one page of the driving bill is vertical and horizontal, that is, x.
It is managed by a matrix of coordinates and y coordinates. In the example, there is a signal at coordinate x = 4, y = 3, and coordinate x
= 5, y = 3, add a value to the signal, and coordinate x =
6 and y = 3, the calculation logic for multiplying the gain is shown. By the way, the program creation in the program creation device 8 starts by inputting a driving bill. Some of the functions written in the operation bill are standard functions, while others are specific to the plant. For standard functions, the library of the program creation device 8 is called to specify (customize) input / output signals and constants for the plant, and for functions unique to the plant, the program creation device Keyboard 1 of 8
Created by inputting from 0 and display 11,
The necessary modules are stored in the customized module stacker 13. When all the modules are prepared, the processing unit 12 of the program creation unit 8 sequentially analyzes the matrix of each sheet and each page for each module of the customized module stacker 13, and the symbols written in each matrix of the matrix are analyzed. Or the signal name is read, and the information on the picture of the operation plan is converted after the instruction of the assembler of the plant controller 4, and then converted to the load module 14 to which the real address is assigned. At this time, the monitor information 15 is also created at the same time when the load module 14 is created. Here, the monitor information is C used for driving.
Information for displaying the driving bill on the RT display 1,
That is, the data necessary to monitor the driving bill on the screen of the CRT display 1, specifically, the x-coordinate signal and the y-coordinate signal used therein corresponding to each page of the driving bill document. , Information on the memory address used in the load module. Based on these signals and information, an information table is created corresponding to the operation plan page, and the module and the index of this table are provided so that the CRT display 1 can monitor. In the present embodiment, in the process of creating the load module, the data about the constant is created at the same time as creating the monitor information. That is, the x-coordinate, the y-coordinate, and the load module are positioned for each control constant corresponding to each page of the driving bill document. 2B shows a load module, and in this example, the machine language O2D8 D511 corresponding to x = 5 and y = 3 in (a) is located at address / 51AF on the load module. 2C shows index information at this time, which is the SH. NO, page number in module, x coordinate, y coordinate, and address in load module are created in the index table. The creation of this index table is a preparation for changing the constant in the plant controller 4. At the time of download, this index table is sent to the plant controller 4.

FIG. 3 shows the flow of information when the constant is changed. The processing and data flow is as follows. Input the change instruction from CRT0. Display the operation plan on CRT0 and monitor it while CRT
Input a change request from 0. Specifically, the control constant to be changed is touched on the CRT display 1 being monitored. Constants necessary for control are written on the operating bill, and the same constants are also displayed on the monitor screen.
When the constant is touched, a cursor for inputting the constant appears on the CRT display 1, the constant to be changed is input from the keyboard 2 attached to the CRT 0, and finally the return key is pressed to confirm the contents. The input constant is transmitted from the CRT 0 to the corresponding plant controller 4 via the network 9 in the form of a change request and its command value. (Because the plant is controlled by a plurality of plant controllers.) The plant controller 4 receives the request, and from the index information 7 received together with the load module 5 by the management program 6 at the time of download, the requested constant is the load module 5 To determine which machine instruction in When the correspondence between the constants on the operating bill and the machine language in the load module 5 is determined in the plant controller 4, the management program 6 determines the idle time of the program, the timing at which the control program is not executed (the control program has a fixed cycle). There is a base task which is executed between the timer task and the timer task which are executed in
Further, during this time, control is once returned to the management program. )
Is detected, the relevant part of the machine language is corrected, and the control constant is changed. The plant controller 4 notifies the CRT 0 and the program creating device 8 of this result. The CRT 0 receives the answer to the change request, changes the display on the CRT display 1, and rewrites the displayed numerical value on the operating bill. (Also, as a modification of the embodiment, it is possible to notify the operator of the change confirmation by changing the color on the CRT display.) The program creating device 8 receives the result and firstly modifies the load module 14. .. This may be the same as the processing executed in the plant controller 4. This is done to prevent the adjustment result from returning to the original when the download is performed at some timing. Next, the program creation device 8 modifies the drawing information file of the module in the customized stacker 13 of its own and the memory information file to generate the change module 16. Using the information passed from the CRT0 to the plant controller 4, the module, page, and coordinates can be immediately determined, so that the change is easy. This applies the adjusted results online to the original module to reflect the adjusted results in the operating bill. This is because if this operation is not executed, the consistency between the actual plant and the document will be lost, and the adjustment results will be lost. This is the end of changing the constant.

FIG. 4 shows a flowchart of the processing of the plant controller 4 in the above-mentioned steps 1 to 4. That is, it is a flow chart for explaining the processing executed by the plant controller 4 when there is a constant change request from the CRT 0. This program is activated when the plant controller 4 receives a message from the network 9. First, determine the content of the message and request a constant change, or
It is judged whether it is another request (step 20). If it is a constant change request, the module name, page designation, coordinates xy, and set value are extracted from the message (step 21). When this is abnormal (for example, when a page that does not exist actually is received), the abnormality occurrence is transmitted to CRT0 (step 31). Next, the index information 7 held in the plant controller 4 is taken out and the corresponding address with the load module 5 is obtained (step 22). If there is no address that corresponds to the index information 7, the error is CRT.
0 (step 31). Then, the rationality of the set value is judged. For example, 6563 at the constant of 1W
If a setting request of 6 or more (a value that cannot be realized with 1 W) is requested, an error is generated (step 23). Next, the actual change starts, but before that, the timeout counter is initialized. This is because if you try to change it and it is not possible, you will not end up in an endless loop (step 2
4). Then, the CPU status and whether the control program is being executed are checked (step 25). When the timing (idle state) is reached when the control program is not being executed, the control program is temporarily prohibited from execution (step 2
7) Rewrite the constant. Rewriting constants while the control program is running may cause the control program to use constants that are in the process of being modified, so the timing when the control program is not being executed is caught as described above, and the control program cannot be executed while it is being modified. (Step 28). If it does not become idle after checking, the control program executes (RU
N), the time-out counter is incremented each time it is checked (step 26), and if the counter reaches a certain value, the process is interrupted as a time-out in step 25. If the rewriting is successful, the execution prohibition of the control program is released, the control program is allowed to be executed (step 29), and the fact that the constant change is normally completed is transmitted to the CRT 0 and the program creating device 8 (step 30). ..

FIG. 5 shows a flowchart of the process of the program creating device 8 at the above-mentioned stage. That is, it is a flowchart for explaining the process of the program creating device 8 when the plant controller 4 finishes changing the constant. The plant controller 4 notifies the program creation device 8 of the end of the constant change, including the information received by the plant controller 4. The program creation device 8 receives this message and checks the content of the received message (steps 40 to 43). Steps 40 to 4
3 is the same as the processing of the plant controller 4. After checking the contents, it is determined whether or not the constant change can be reflected in the module in the customized module stacker 13. That is, if the module is modified by the program creation device 8 after the download (for example, if the program is modified in advance due to plant modification or the like and this is done in advance), the modified module is downloaded. Since the information held by the plant controller 4 and the information held by the program creation device 8 do not match, the information cannot be changed (step 44). In this case, a message is displayed on the display 11 of the program creating device 8 and the process ends (step 48). If it has not been modified by the program creation device 8, the constant is rewritten, the load module is modified (step 45), the monitor information is modified (step 46), and the process is terminated.

As described above, according to this embodiment,
It has the following features. That is, in the conventional program creation, when creating a load module in the program creation device 8, an operation bill document is created on the program creation device 8 (input using a dedicated editor). Or, customize the general-purpose module in the standard module stacker and store it in the customized stacker. The modules of the customized stacker are analyzed by compilation and converted into an assembler source program. The assembler source is converted by the assembler into objects in module units having standard addresses. The object is converted into an executable load module by the last editing operation. Even if the constant is changed according to the operating bill, the above flow is used. Since the conversion is performed through the above multiple processes,
It requires a lot of processing. Furthermore, the program creation device 8
In, since modules are managed as a unit,
Even when one constant is changed, there is no choice but to go through such a route for one module as a whole. In the field of actual adjustment, it is a problem how quickly and surely the adjustment is performed and the plant is started up in a short period of time. In the case of replacement remodeling of the old plant, how to shorten the line stop period and start up the production line is an important factor, and it takes enough time to create the program before the stop period. While it can be executed, the trial run must be executed within a limited time and by moving the actual hardware. Therefore, how efficiently this test run is more important than program creation. On the other hand, in the present embodiment, the operation plan document input to the program creation device 8 at the time of creating the program can be displayed on the CRT 0, and the control constants necessary for plant control can be changed while checking. Since there is no need to rewrite or download, it is easy to use (easy) and the control constant can be changed without stopping the line (quickly).
The plant control can be adjusted quickly. The CRT of this embodiment is an example of the display means, and the present invention can be applied to display means based on other principles such as a liquid crystal display device other than the CRT.

[0012]

According to the present invention, the operation plan document input to the program creating device at the time of creating the program is C
Since the control constants required for plant control can be changed while being displayed and displayed on the RT, it is possible to change the constants easily and easily. Further, since the plant controller directly rewrites the load module by using the correspondence between the control constants on the operation plan received at the time of download and the load module, the change does not take time, and since there is no need for downloading, once the CPU Since it is not necessary to stop the line, that is, to stop the line for changing the constant, it is possible to quickly change the constant, and thus it is possible to efficiently execute the plant control adjustment. Furthermore, by transmitting the constants changed from the plant controller to the program creation device, the same modification can be applied to the load module in the device, and the adjustment result can be reflected in the original module itself.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an embodiment of the present invention.

FIG. 2 is an explanatory diagram of data contents of the present invention.

FIG. 3 is an explanatory diagram of signal processing.

[Figure 4] Flowchart of program creation

[Figure 5] Flowchart of program creation

[Explanation of symbols]

 1 CRT display 2 keyboard 3 CRT controller 4 plant controller 5 load module 6 management program 7 index information 8 program creation device 9 network 13 customized module stacker 14 load module 15 monitor information

Claims (4)

[Claims] 1. A control system comprising a program creation device, an operation monitoring device (CRT) for monitoring a plant, a plant controller for controlling the plant, and a network for linking these, and a CR.
The operating bill is displayed on T, the control constant on the operating bill to be changed is specified from the CRT, the changed value is input, and the control constant of the operating bill is changed in real time by the plant controller. Control program modification method. 2. The program creation device according to claim 1, wherein the program creation device simultaneously creates the control parameter on the operating bill and the corresponding index information of the load module,
A method for modifying a control program, characterized by transferring this to a plant controller when downloading. 3. A control system comprising a program creating device, an operation monitoring device (CRT) for monitoring the plant, a plant controller for controlling the plant, and a network for linking these, wherein the program creating device is , Has the function of simultaneously creating the control constants on the operating bill and the corresponding index information of the load module, and transferring this to the plant controller at the time of download. The CRT displays the operating bill on the screen and controls the operating bill. It has a function of inputting a change value while designating a constant, and the plant controller has a function of changing the control constant of the operating bill to the idle time of the control program in response to the index information. Control program correction device. 4. The control program correction device according to claim 3, wherein the result of changing the control constant is reflected on the display of the CRT and in the load module of the program creation device.