JPH0728503A - Method and tool for system design support - Google Patents

Abstract

PURPOSE:To easily convert and extract information and to improve the manageability of data by converting state quantum data obtained from an object to desired objective data. CONSTITUTION:These method and tool for system design support are provided with a conversion condition input means which inputs the conversion condition for conversion of state quantum data sent from a control object 13, a data gathering/editing means 15 which extracts state quantum data sent from the control object and converts state quantum data to objective data based on the conversion condition inputted by the conversion condition input means, and control condition calculating means 16 and 17 which calculate the control condition of a controller 12 based on objective data converted by the data gathering/editing means and send the calculation results to the controller, and a process where discrimination information to specify an unconverted data file is added to a converted data file is included as the conversion process when the converted data file is generated from the unconverted data file.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system design support tool and a system design support method for supporting the design of control conditions by defining the operation and configuration of a process control system including a control target and its control device, The present invention relates to a system design support tool and a system design support method capable of facilitating a design by providing a technique for converting extracted data into a desired form and storing it in the tool.

[0002]

2. Description of the Related Art Generally, in a process control system consisting of a controlled object and its control device, the processing speed and processing capacity of a computer in the control system remarkably increases, and the computer is connected to another control system. , The contents are becoming more complicated due to integration and large scale.

In such a complicated control system, in order to support construction, operation and maintenance of the control system,
2. Description of the Related Art System design support tools for obtaining desired control information based on information provided by a control device and a user are widely used.

The tool means a device that operates independently as a subsystem of a target control system. Specifically, depending on the scale, content and connection form of the control system,
It is selected and used from workstations, personal computers, and dedicated hardware.

FIG. 8 is a schematic diagram showing the configuration of this type of system design support tool, and FIG. 10 is a diagram for explaining the relationship between data generated by a certain function of this system design support tool and its file name. It is a figure.

This system design support tool converts state quantity data 2 consisting of manipulated variable data MV and control quantity data PV extracted from the process control system 1 by a data converter 3 and supports the converted data 4. Send to tool 5.

Based on this data 4, the support tool 5
The modeling function 5a, the control system design function 5b, and the simulation function 5c are operated to calculate a control constant and output the control constant. In addition, as shown in FIG.
The data conversion function 6 may be incorporated in the process control system.

At this time, for example, in the modeling function 5a, as shown in FIG. 10, the input data x1 as the data 4 obtained from the data converter 3 is calculated and output data y11, y12 for giving to the control system design function 5b. To obtain the output data files Y11 and Y12 from the input data file X1 containing the input data x1. Similarly, when the input data x2 is calculated to obtain the output data y21, the output data file Y21 is generated from the input data file X1 containing the input data x2. X1, Y11, Y
12, X2 and Y21 are file names, which correspond to the data contents.

As for the control system design function 5b and the simulation function 5c, a plurality of output data are generated for one input data as in the modeling function 5a. Therefore, a plurality of data files are generated for the function located in the latter stage. Further, the system design is performed by extracting a large number of input data by trial and error while changing the control condition little by little, so that a large number of similar input data and output data thereof can be obtained for each function.

As described above, the system design support tool that handles a large number of data is converted in order to identify a large number of converted data files converted by the modeling function 5a, the control system design function 5b, and the simulation function 5c. The system design is supported by classifying and managing the relationship between the converted data file and the unconverted data file that is the source of this file individually by file name and directory.

[0011]

However, in the system design support tool as described above, the process control system 1
Since there is no function of converting the data 2 sent from the process control system 1 into the desired format, the data converter 3 must be provided in the subsequent stage of the process control system 1 in order to convert the data from the process control system 1 into the desired format and amount of information. There is a problem that the degree of freedom of the system is reduced.

Further, when a file group having a large number of similar data is identified only by the file name, the file name is complicated because the number of label characters is limited, and the data content is grasped from the file name. Becomes difficult. Furthermore, when identifying such files by the data directory name, as the number of files increases,
There is a problem that the hierarchy becomes deep and the handling becomes complicated.

The present invention has been made in consideration of the above situation, and provides a system design support tool capable of converting state quantity data obtained from an object into desired target data and facilitating information conversion and feature quantity extraction. The purpose is to provide. Another object of the present invention is to provide a system design support method that can easily identify a large number of similar data and improve the manageability of the data.

[0014]

According to a first aspect of the present invention, in a system design support tool for designing control conditions of a control device for controlling a control target, state quantity data sent from the control target is converted. Conversion condition input means for inputting conversion conditions for extracting the state quantity data sent from the controlled object, and based on the conversion condition input by the conversion condition input means, the state quantity data is used as target data. Data collection / editing means for converting into control data, and control condition calculation means for calculating control conditions of the control device based on the target data converted by the data collection / editing means, and sending the calculation result to the control device. It is a system design support tool equipped with.

Further, the invention according to claim 2 is the system design support method for converting the state quantity data extracted from the control target of the control device a plurality of times to design the control conditions of the control device. In the converting step of at least one of the converting steps, the step of adding identification information for identifying the unconverted data file into the converted data file when generating the converted data file from the unconverted data file. It is a system design support method including.

[0016]

Therefore, in the invention corresponding to claim 1, the conversion condition input means inputs the conversion condition for converting the state quantity data sent from the controlled object by taking the above means, The collecting / editing means extracts the state quantity data sent from the controlled object, and converts the state quantity data into target data based on the conversion condition input by the conversion condition input means, and the control condition calculating means, Since the control condition of the control device is calculated based on the target data converted by the data collecting / editing means and the calculation result is sent to the control device, the state quantity data obtained from the target is converted into desired target data. , Information can be easily converted and feature quantities can be extracted.

Further, the invention according to claim 2 is the unconverted data file for at least one conversion step among a plurality of conversion steps based on the state quantity data extracted from the control target of the control device. When a converted data file is generated from, the process of adding identification information that identifies the unconverted data file into the converted data file is included, which facilitates the identification of many similar data and manages the data. Can be improved.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing the configuration when a system design support tool according to an embodiment of the present invention is applied to a process control system. The process control system 11 is
The control device 12 that sends the operation amount data MV based on the deviation between the control amount data PV and the set amount data SV, and the control target 13 that sends the control amount data PV based on the operation amount data MV received from this control device 12. It consists of

The system design support tool uses the input I / F 1
4 extracts the operation amount data MV sent from the control device 12 and the control amount data PV sent from the controlled object 13, and converts the operation amount data MV and the control amount data PV into conversion condition input means and data collection / editing means. Is sent to the response data collection / editing unit 15.

The response data collection / editing unit 15 has a function of storing data conversion conditions input from the outside, and the operation amount data MV sent from the control device 12 and the control amount data sent from the controlled object 13 When PV is extracted, the state quantity data composed of the manipulated variable data MV and the control quantity data PV is stored in the unedited data file, and the state quantity data stored in this unedited data file is based on the above-mentioned data conversion condition. The converted state quantity data is stored in the edited data file together with the identification information of the state quantity data before conversion.

The modeling unit 16 creates a mathematical model representing the operation of the controlled object 13 based on the order data input from the outside and the state quantity data stored in the edited data file of the response data collection / editing unit 15. Then, the created mathematical model data is stored in the modeled data file together with the identification information of the edited state quantity data.

The control system design unit 17 obtains the control constant (control condition) of the control device 12 based on the design condition input from the outside and the mathematical model data stored in the modeled data file of the modeling unit 16, It has a function of storing the control constant in the designed data file together with the identification information of the mathematical model data. The controller 13
The control constant of is equivalent to a PID constant when performing PID control, for example.

Further, when the control section stored in the designed data file is simulated by the simulation section 18, the control system design section 17 sets the control constant in the control device 12 via the output I / F 19. It has a function. The modeling unit 16 and the control system designing unit 17 form a control condition calculating unit.

The simulation unit 18 is based on the simulation conditions input from the outside, the mathematical model data stored in the modeled data file of the modeling unit 16 and the control constants stored in the designed data file of the control system design unit 17. And has the function of executing the simulation.

That is, as shown in FIG. 2, the apparatus of this embodiment converts the state quantity data obtained from the process control system 11 into target data by the response data collecting / editing unit 15 in the support tool, and converts the target data into the target data. Based on this, the modeling unit 16, the control system design unit 17, and the simulation unit 18 are configured to execute the above-described processing.

Next, the operation of the system design support tool thus configured will be described with reference to the flowchart of FIG. Now, the response data collection / editing unit 15 is preliminarily input by the operator with offset removal data indicating a data conversion condition for subtracting a predetermined offset amount from the state amount data so as to remove the offset.

Further, the response data collection / editing section 15 extracts the state quantity data having an offset from the control device 12 and the controlled object 13 as shown on the left side of FIG. 4 and stores it in the unedited data file. In addition, the response data collection / editing unit 15 converts the state quantity data stored in the unedited data file into the target data with the offset removed as shown on the right side of FIG. The target data is stored in the edited data file together with the identification information of the state quantity data (ST1).

That is, the edited data file is shown in FIG.
As shown in, when the state quantity data before conversion stored in the unedited data file is xi, the offset removal data which is the conversion condition is αj, and the generated target data after conversion is yij, Identification information "i" is added to the converted file contents. For example, when the data x1 before conversion becomes the data y11, y12 after conversion, the identification information "1" of the data x1 is added to the contents of the converted file. When the data x2 before conversion becomes the data y21 after conversion, the identification information "2" of x2 is added to the contents of the converted file. The file names of the unedited data file and the edited data file at this time are set to alphabets A to E, which are unrelated to the data content. The file management based on such identification information is also executed in the modeling unit 16 and the control system design unit 17 in the same manner.

The modeling unit 16 reads out the target data from the edited data file, creates a mathematical model of the controlled object 12 from the target data, and stores the corresponding mathematical model data together with the identification information of the target data in the modeled data file. (ST2).

The control system designing unit 17 reads the mathematical model data from the modeled data file, finds the control constant of the controlled object 13 based on the mathematical model data, and stores the control constant together with the identification information of the mathematical model data. The data is stored in the designed data file (ST3).

The simulation section 18 reads the control constants from the designed data file and also reads the mathematical model data from the modeled data file. Then, the simulation unit 18 executes the simulation based on the read control constant and the mathematical model data, and outputs the execution result.

The execution result is evaluated by the operator, and the conversion condition, the order data, the design condition and the simulation condition are appropriately changed by the operation of the operator based on the evaluation result, the response data collecting / editing unit 15, the modeling unit 16 ,
It is input to the control system design unit 17 and the simulation unit 18 (ST4).

Further, the control system designing section 17 sets the control constants stored in the designed data file in the control device 12 by the operation of the operator based on the evaluation result, and sets the designed control constants in the controlled object 13. Apply (ST5).

Hereinafter, the system design support tool again
The optimum value of the control constant is determined by trial and error by repeatedly executing the extraction of state quantity data to the simulation.
As described above, according to the present embodiment, the response data collection / editing unit 15 extracts the state quantity data transmitted from the control device 12 and the controlled object 13 and based on the conversion condition input from the outside, The state quantity data is converted into target data, and the modeling unit 16 and the control system design unit 17 obtain the control constant of the control device 12 based on the target data converted by the response data collection / editing unit 15 and calculate the control constant. Since the setting is made in the control device 12, the state quantity data obtained from the target can be converted into desired target data, and the data conversion and the feature quantity extraction can be easily performed.

Further, according to the present embodiment, unlike the prior art, since the response data collection / editing section 15 is provided in the support tool, the degree of freedom of the system can be increased. Furthermore, according to the present embodiment, in the three processes of the response data collection / editing process, the modeling process, and the control system designing process, which perform conversion based on the state quantity data extracted from the control target 13 of the control device 12, When generating a converted data file from each unconverted data file, it includes a step of adding identification information for identifying the unconverted data file to the converted data file, which facilitates identification of many similar data. , The manageability of data can be improved.

Further, according to this embodiment, the parent-child relationship between files can be identified by this identification information.
For example, a file system diagram can be created, and files can be managed by this file system diagram.

Furthermore, according to the present embodiment, since any file name can be used, it is possible to provide an environment that is easy for the user to use. In the above embodiment, the case where the response data collecting / editing unit 15 removes the offset has been described. However, the present invention is not limited to this, and as shown in FIG. Even if data is converted under arbitrary conversion conditions such as removing time or converting the time axis as shown in FIG. 7, the present invention can be implemented in the same manner and similar effects can be obtained. This kind of conversion can also be applied depending on the purpose, such as conversion for calculating a data difference or conversion for removing a noise component.

In the above embodiment, the case where the support tool is online connected to the data transmission path on the input / output side of the controlled object 13 to indirectly extract the manipulated variable data MV and the controlled variable data PV has been described. Not limited to this, even if a data logging device is provided in the controlled object 13 to directly collect the manipulated variable data MV and the controlled variable data PV, the present invention can be similarly implemented to obtain the same effect. .

Furthermore, in the above embodiment, the case where the identification information of the data is a short code has been described, but the present invention is not limited to this, and a comment may be used as the identification information.
The present invention can be implemented in the same manner to obtain the same effect.

In the above embodiment, response data collection /
The case where the editing unit 15, the modeling unit 16, and the control system designing unit 17 add the identification information to the converted data file has been described, but the present invention is not limited to this. Design department 17
Even if the identification information is added to the converted data file in one or two of the above, the same effects can be obtained by implementing the present invention in the same manner. In addition, the present invention can be modified in various ways without departing from the scope of the invention.

[0041]

As described above, according to the first aspect of the invention, the conversion condition input means inputs the conversion condition for converting the state quantity data sent from the controlled object, and the data collection / editing means operates. , The state quantity data sent from the controlled object is extracted, and the state quantity data is converted into target data based on the conversion condition input by the conversion condition input means, and the control condition calculation means collects / edits this data. Since the control condition of the control device is calculated based on the target data converted by the means and the calculation result is sent to the control device, the state quantity data obtained from the target is converted into desired target data, It is possible to provide a system design support tool that can easily perform the conversion of and the extraction of the feature amount.

Further, according to the second aspect of the invention, at least one of the plurality of conversion steps based on the state quantity data extracted from the control target of the control device includes at least one conversion step.
When a converted data file is generated from an unconverted data file, the process of adding identification information that identifies the unconverted data file to the converted data file is included, so that it is possible to identify many similar data. It is possible to provide a system design support method that facilitates and improves data manageability.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration when a system design support tool according to an embodiment of the present invention is applied to a process control system.

FIG. 2 is a schematic diagram showing the configuration of a system design support tool according to the embodiment.

FIG. 3 is a flowchart showing an operation in the embodiment.

FIG. 4 is a diagram for explaining a conversion operation in the embodiment.

FIG. 5 is a diagram for explaining file management in the embodiment.

FIG. 6 is a view for explaining a modification of the conversion operation in the same embodiment.

FIG. 7 is a view for explaining a modification of the conversion operation in the same embodiment.

FIG. 8 is a schematic diagram showing a configuration of a conventional system design support tool.

FIG. 9 is a schematic diagram showing the configuration of a conventional system design support tool.

FIG. 10 is a diagram for explaining a relationship between conventional generated data and a file name.

[Explanation of symbols]

11 ... Process control system, 12 ... Control device, 13 ... Control object, 14 ... Input I / F, 15 ... Response data collection / editing unit, 16 ... Modeling unit, 17 ... Control system designing unit, 18 ...
Simulation unit, 19 ... Output I / F.

Claims (2)

[Claims] 1. A system design support tool for designing control conditions of a control device for controlling a controlled object, comprising conversion condition input means for inputting conversion conditions for converting state quantity data sent from the controlled object, Data collection / editing means for extracting the state quantity data sent from the controlled object and converting the state quantity data into target data based on the conversion condition input by the conversion condition input means; A system design support tool comprising: a control condition calculation unit that calculates a control condition of the control device based on the target data converted by the editing unit and sends the calculation result to the control device. 2. A system design support method for designing a control condition of a control device by converting state quantity data extracted from a control target of a control device a plurality of times, wherein at least one of the plurality of conversion steps is performed. The converting step includes a step of adding identification information for identifying the unconverted data file in the converted data file when generating the converted data file from the unconverted data file storing unconverted data. A method for supporting system design, which is characterized by being out.