JPH07295609A - Control system construction device - Google Patents

Abstract

PURPOSE:To provide the control system construction device which can construct a control system visually and graphically and evaluate the control system including the processing result of intermediate control logic. CONSTITUTION:The control system constitution device is equipped with a logic editing part a1 which has a plotting function and a data input function, edits control logic into a figure by using node data d1 and plant data d2, and outputs logic edited data d3, a data conversion part a2 which inputs the logic edited data d3 and outputs evaluated logic data d4, evaluation execution order data d5, screen display data d6, and screen expansion data d7, a logic processing part a3 which inputs the evaluated logic data d4 and evaluation execution order data d5, executes the control logic for evaluation, and outputs its processing result, and a screen display part a4 which inputs the screen display data d6, screen expansion data d7, and node data d1, displays the control system graphically, and displays the processing result of the logic processing part a3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus for constructing a control system for a power plant or a chemical plant, and particularly for constructing a control system simply by graphical editing and evaluation using process data of an actual plant. The present invention relates to a control system construction device.

[0002]

2. Description of the Related Art In recent years, automatic operation control utilizing various control systems has come into widespread use in power plants and chemical plants due to complication of plant configurations.
Here, the control system is a system for associating various plant control devices with each other and controlling a predetermined plant system to a predetermined operating state. Recently, the plant system is generally controlled by a computer,
Therefore, it is common to build a control system with a program on a computer.

Conventionally, the programs of these control systems have been programmed according to their individual purposes, so they are unique to each control system and cannot be used for other control systems. It was

For this reason, when trying to control a new plant system, a new control system program was created. Further, when it is necessary to reconstruct the control system due to changes in specifications, the contents of the existing control system program are analyzed and necessary corrections are made.

[0005]

However, the amount of the above-mentioned control system program creation becomes enormous as the configuration of the target plant becomes more complicated, and the complicated causal relationship of the process must be taken into consideration when creating the program. It was extremely difficult to do because it did not happen.

Further, in general, expressing the control logic on a program requires a high level of programming technique, and more specifically, whether or not a program evaluation, that is, a program, can obtain a control response as intended is described in detail. I couldn't check. In other words, the conventional program evaluation of the control system program was performed by outputting the output data of the program to a file, a terminal, etc. and directly viewing the numerical values, or using another display program, etc. It is a display of only the data at the end of the control system, that is, the result obtained through the circuit in the middle, and what kind of intermediate processing actually obtained such results depends on the input / output values of the design drawing and logic. I had to guess from.

Therefore, there is a problem that the accuracy of the completed control system program depends on the skill of the programmer who created it.

[0008] Therefore, an object of the present invention is to solve the above-mentioned problems of the prior art, to make it possible to construct a control system visually / graphically, and to evaluate including the processing result of an intermediate control logic. Accordingly, it is an object of the present invention to provide a control system construction device that can easily construct a control system of high accuracy uniformly regardless of the skill of the creator.

[0009]

In order to achieve the above object, a control system construction apparatus according to the present invention has a drawing function and a data input function on a screen of a computer, and a logic of a control logic which constitutes a plant control system. A logic editing section that edits the control logic into a figure using the node data including the shape data and attribute data of the node and the plant data used for plant control, and outputs the logic editing data, and inputs the logic editing data. Then, the evaluation logic data including the evaluation control logic configured to input and process the process data of the plant, the evaluation execution order data that defines the execution order of the evaluation control logic, and the logic editing unit. Screen display data that graphically displays the control logic edited in the computer screen, and the predetermined control A data conversion unit that outputs screen development data for developing from the screen of the GIC to the screen of the related control logic, the evaluation logic data and the evaluation execution order data are input, and the process data of the plant is periodically sampled. Then, the logic processing unit for executing each evaluation control logic and outputting the processing result, the screen display data, the screen development data, and the node data are input, and the whole or one of the plant control systems is displayed on the computer screen. And a screen display unit for displaying the processing result of the evaluation control logic by the logic processing unit on the plant control system.

[0010]

The control system construction device according to the present invention has a drawing function and a data input function on the computer screen of the logic editor, and these functions and node data including the shape / attribute data of the control logic node. And the plant data can be used to graphically and visually edit the control logic. By the operation of the logic editing unit, a person who wants to construct a control system can easily construct a desired control logic without requiring a high-level programming technique for expressing the control logic in a computer program. The data of the control logic edited by the logic editing unit is output as logic edit data.

The logic edit data is input to the data editing section and converted into four types of data: evaluation logic data, evaluation execution sequence data, screen display data and screen development data.

Of these, the evaluation logic data is obtained by converting the control logic constituting the control system for evaluation.
In each control logic, the control logic nodes are ordered so that they are processed from the upstream side, and the plant process data and the processing result of the processed upstream logic node are acquired from a predetermined address on the memory, and each logic node is processed. The processing result of is output to the specified memory address. The evaluation execution order data is
It shows the execution order of the control logic that constitutes the control system so that the control system is consistent. The screen display data should graphically display the whole or part of the control system on the computer screen, and display the results processed by each logic node for control system evaluation on the displayed control system. The data is composed of. The screen development data is data that describes the relationship between the control logics so that when the control system displayed on the screen is related to another screen, the control logic can be expanded from the screen to the related screen.

The evaluation logic data and the evaluation execution sequence data are input to the logic processing unit, and the logic processing unit
Each evaluation control logic that configures the control system is executed according to the order of the evaluation execution order data. Each control logic periodically inputs the process data of the plant directly from the address of the memory that holds it, or inputs the processing results of other logic nodes from the address of the work memory,
Processing by the control logic is performed and the processing result is output as a control signal or as data on a predetermined address of the work memory.

On the other hand, the screen display data and the screen development data are sent to the screen display unit, and the screen display unit displays the whole or a part of the control system on the computer screen based on these data and the node data. , The processing result by the logic processing unit is acquired from the work memory and displayed on the control logic displayed on the screen. Furthermore, when the processing result by the logic processing unit is updated, the screen is updated with the latest processing result.

According to the control logic screen displayed by this screen display unit and the processing result of each logic node,
The person who constructed the control system can judge whether or not each control system is performing the desired control, and can easily make a correction when the control system does not perform the desired control operation.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the controller construction apparatus according to the present invention will be described below with reference to the accompanying drawings.

FIG. 1 shows the configuration of a control system construction apparatus and the data flow thereof according to an embodiment of the present invention. The control system construction device 1 of the present embodiment includes a logic editing unit a1, a data conversion unit a2, a logic processing unit a3, and a screen display unit a4.

The logic editing unit a1 has a drawing function on the screen of a computer and a data input function, and stores node data d1 including attribute / shape data of the nodes of the control logic and plant data used for plant control. Entering the plant data table d2 graphically and
Allows you to visually edit and build control logic. The data edited in this way is output as logic edit data d3.

The data conversion section a2 has a data conversion function, receives the logic edit data d3, and acquires the process data of the plant online to perform processing and evaluate logic data d4 and evaluation logic data d4. The evaluation execution order data d5 that defines the execution order of the control logic, the screen display data d6 that graphically displays the edited control logic on the screen of the computer, and the related control logic from the screen of the predetermined control logic. The screen development data d7 for developing on the screen is output.

The logic processing section a3 inputs the evaluation logic data d4, the evaluation execution order data d5 and the process signal s1 and executes the control logic contained in the evaluation logic data d4 in the order of the evaluation execution order data d5. , And outputs the processing result (including the processing result of the intermediate control logic) as the control signal s2 and the data at the predetermined address on the work memory.

The screen display section a4 displays the screen display data d6.
And the screen development data d7 to graphically display a part or the whole of the control system on the screen of the computer, and the processing result of the control logic of the predetermined address on the work memory output by the logic processing unit a3. Enter and display at the corresponding position on the control system displayed on the screen.

Next, the processing in each component of the control system construction apparatus 1 of this embodiment will be described in more detail.

FIG. 2 exemplifies a display screen during editing of the control logic by the logic editing unit a1. As shown in the figure, while the control logic is being edited, a menu screen 10 for selecting a logic node to be arranged and an edit screen 20 for actually arranging the selected logic node and connecting a bridge line and the like are displayed. Displayed above. Here, the logic node refers to a component of the control logic that performs various functions such as input / output logical operation and delay (referred to as an attribute of the logic node).

The menu screen 10 further has an analog node menu 11 for selecting an analog node and a digital node menu 12 for selecting a digital node. When the logic node displayed in these menus 11 and 12 is selected with a mouse or the like, the selected logic node is displayed in the selection node display window 13. The shape data of the logic node selected here and placed on the editing screen 20 is input to the logic editing unit a1 in advance as node data d1.

When a mouse button is clicked on the edit screen 20 after selecting a logic node on the menu screen 10, the logic node displayed in the selected node display window 13 is moved to the coordinate position of the mouse cursor on the edit screen 20. When the mouse cursor is displayed, the logic node moves in accordance with the movement, and when the mouse button is clicked again, the position of the logic node is fixed. By repeating the above-described editing operation, necessary logic nodes are arranged on the editing screen 20, these logic nodes are connected by a bridge line, and the relationship between the logic nodes is clarified.

In connection of the grid line, first, when the mouse cursor is moved onto the logic node for performing the grid line and the mouse button is clicked, the edit menu 21 is displayed. This edit menu 21 shows edit items for the selected logic node, and the edit items differ depending on the grid line state between the logic node selected at that time and another logic node.

The edit menu 21 illustrated in FIG. 2 includes "delete node" 22, "move node" 23, "copy node" 24, "generate grid line" 25, and "set data".
26, each edit item. By selecting these edit items, it is possible to delete, move, copy, generate a grid line, and set data for the logic node where the mouse cursor is located.

FIG. 3 is an edit screen 2 for connecting the bridge line.
A transition of 0 is shown. Select logic node and select
When selecting "Generate grid line" 25 in the edit menu 21 of, a grid line is created starting from the selected logic node, and when the mouse cursor is moved after selection, the grid line starting from the logic node selected first is created. Generated (Screen 3
0). In order to connect the bridge line to the logic node of the connection destination, the break point in the middle is designated by clicking the mouse button (screen 31). When the mouse cursor is moved to the logic node of the connection destination and the mouse button is clicked, the grid line is connected to the logic node (screen 32). At this time, if the center of the logic node of the connection destination is displaced with respect to the square line, the logic node of the connection destination moves in a vertical fragrance to correct the displacement (screen 33). However, at this time, it is determined whether the logic node of the connection destination is movable, and only when it is determined that the logic node of the connection destination can be moved, the logic node is moved. As a condition for judgment, when the logic node of the connection destination is already connected by another logic node grid line, it is a condition that the grid line with other logic nodes is not distorted by moving that logic node. To do.

The relationship between the logic nodes is established by repeating the above-mentioned bridge line connection work. However, during the progress of the bridge line connection work, the connection of the grid lines is not established because the first logic node is not arranged properly. It may be impossible to do it. For such a case, the logic editing unit a1 of this embodiment has an editing function of collectively editing a plurality of connected logic nodes as a block.

As described above, the edit items of the edit menu 21 differ depending on the connection state of the selected logic node to the grid line, and when the grid lines are connected upstream, downstream, upstream and downstream, "Move all upstream nodes", "Move all downstream nodes", "Move all upstream nodes", etc. For example, in FIG. 4, when the logic node 40 is selected to display the edit menu, the edit menu to which the above-mentioned edit items are added is displayed, and when the edit item "move all upstream and downstream nodes" is selected, The logic nodes 40, 41, 42, 43 having the connection relationship are collectively moved as a block 44. By moving the mouse cursor, the block 44 can be moved according to the movement of the mouse cursor. Further, it is possible to simultaneously delete all logic nodes having a connection relationship by the same means.

Next, a data setting operation for the control logic which has the logic node arrangement and the bridge line connection as described above will be described.

The control logic in which the logic data is arranged and the grid lines are connected defines only the flow of processing, so input / output data can be designated for this, and intermediate processing conditions (control constants) can be specified. Need to be determined. The data setting work is a work for defining the input / output data and the processing condition, and can be performed by selecting the edit item "data setting" 26 in the edit menu 21 of FIG. The apparatus of this embodiment has a data setting method by keyboard input and a data setting method by menu selection.

FIG. 5 shows a screen for data setting.
Of these, FIG. 5A shows a data setting screen 50 of an input / output logic node, and FIG. 5B shows a data setting screen 51 of a timer node as an example of an intermediate logic node.

In FIG. 5A, the plant data name 5
5 is for designating the name of the input / output signal to the input / output logic node from the plant data, and the label name 56 is the name of the input / output signal for the logic node displayed on the screen. It is for attaching.

To set the plant data name 55, the corresponding plant data name is selected and set from the data selection screen 60 as shown in FIG. Data selection screen 6
The names of various signals of the plant process data are displayed in a list format on the data name display unit 0 of 0, and the scroll bar 62 moves the display contents up and down. The data is displayed on the data name display section 61 by using the scroll bar 62, and the data to be set is selected by the mouse cursor.
A mark is displayed on the selected data 63 as shown in the figure, indicating that the data has been selected.

To set "Tank A water level" in the plant data name 55 as shown in FIG. 5, select "Tank A water level" in the data selection screen of FIG. The data setting button 54 is selected with the mouse.
As a result, the plant data name 55 is set.

On the other hand, as the label name 56, an arbitrary name is set by inputting characters from the keyboard. After setting these data, select the confirm button 52,
When canceling the setting contents, the cancel button 53 is selected.
After setting the label name 56, the set contents are displayed on the editing screen 20 (see FIG. 2), and the coordinates are fixed by adjusting the position with the mouse as in the case of arranging the logic nodes.

The intermediate logic node requires a control constant to be set depending on the type. For example, in the case of a timer node, a time constant needs to be set, and the time constant is set in the data setting section 57 of the timer node data setting screen 51. Enter the value of into the keyboard.

The data displayed on each data display unit 61 of FIG. 6 is the plant data table d2 (see FIG. 1).
(See reference). Here, the structure of the plant data is shown in FIG. As shown in FIG. 7, the plant data table d2 has columns of a data name name 70, a unit 71, and a display format 72, and the content of the data name name 70 is displayed on the data name display unit 61 of FIG. The contents of 71 and the display format 72 are used when displaying the data value on the screen of the control logic.

At the time when all the operations of the above logic node arrangement, grid line connection, and data setting are completed, the logic editing section a1 outputs the contents of the edit screen as logic edit data d3 (see FIG. 1).

FIG. 8 shows the contents of the logic edit data. In FIG. 8, data cells 80 to 89 store data for one logic node. The order in which the nodes are arranged is stored in the data cell 80, the name of the node is stored in the data cell 81, the coordinates on the screen are stored in the data cell 82, and the grid input to the node is stored in the data cell 83. The number of lines is stored, and the number of grid lines output from the node is stored in the data cell 84.
The number of the output grid line of the data cell 84 is stored in 5, the number of attribute data set in the node is stored in the data cell 86, and the attributes shown in the data cell 86 are stored in the data cells 87 and 88. The data, in this example, the name of the input signal and the label name given to the logic node are stored. In the case of the timer logic node, the time constant is stored in the data cell of the attribute data. In the data cell 89,
Coordinates on the screen displaying the label are stored as relative coordinates from the logic node.

As the file name of the logic edit data d3, the name of the control logic created when outputting the logic edit data is assigned as the file name.

The logic edit data d3 is converted into the evaluation logic data d4, the evaluation execution order data d5, the screen display data d6, and the screen development data d7 by the data conversion unit a2 (see FIG. 1). Hereinafter, various data conversions in the data conversion unit a2 will be described with reference to the drawings.

In the processing of the control logic for evaluation, the processing is performed from the logic node on the upstream side, and each logic node directly inputs the process data and the processing result of the logic node on the upstream side from the memory. (Hereinafter referred to as online input), the processing result must be output to a predetermined memory address. Therefore, in order to create the evaluation logic data d4, re-editing of the processing order of the logic edit data d3 and input / output data Memory has to be allocated. This will be described with reference to FIGS. 9 to 12.

FIG. 9 shows an example of the edited control logic. In the figure, the numbers shown in parentheses after each node indicate the editing order when the control logic is edited.

To execute this control logic, first process the input logic nodes 90, 91, 92, then the AND logic node 9 of the intermediate logic node,
Finally, the output logic node 94 has to be processed.

On the other hand, at the time of actual editing, for example, as shown in the drawing, the logic nodes 64, 90, 93, 91,
It may be edited in the order of 92. When the control logic is edited in this order, the logic edit data d3 is as shown in FIG.
become that way. In order to make the editing order of this logic node the processing order of the control logic, the value conversion data editing data d3 is reorganized in the data conversion unit a2 and is arranged in the order of the logic nodes shown in FIG. 11 according to the processing order of the control logic. It In this organization work, the data conversion unit a2 inspects the upstream / downstream positioning from the connection relation of each node,
Order each logic node so that it is always processed from the upstream side.

Further, in the control logic for evaluation, each logic node must input and process data and output data online, so that the data conversion unit a2 stores the memory of input / output data with respect to the logic edit data d3. Assign addresses.

FIG. 12 shows the structure of the evaluation logic data d4. The evaluation logic data of FIG. 12 corresponds to the examples of FIGS. 9 to 11, and the logic nodes 90, 9
1, 92, 93, 94 are already organized in the order of their processing.

The node type 90a shown in this figure,
91a, 92a, 93a, 94a are data for identifying which kind of logic node is to be processed, and the node name of the edited control logic is set (the same content as the node name 81 in FIG. 8). ). The input data addresses 90b, 91b, 92b of the input logic nodes are addresses on the memory of the process data s1 of the plant. In this embodiment, since the signal name set in the node attribute data of the logic edit data d3 is replaced with the optimum format for online logic processing, that is, the address on the memory, the same on the plant data table d2 shown in FIG. 7 is used. The code name is searched, and the bias is set as the address on the memory of the plant process data s1 from the detected position, that is, the head of the table.

The output data addresses 90c, 91c, 92c of the input logic nodes 90, 91, 92 are assigned addresses on the work memory for temporarily holding the data input to these input logic nodes.

Input data number 93 of AND logic node
The number of data input to this logic node is set in b.

In the input data addresses 93c, 93d and 93e of the AND logic node 93, the addresses on the work memory of the data input to the logic node are set. This input data address 93c, 93d, 93e
Of the input logic nodes 90, 91, 92
The output data addresses 90c, 91c, and 92c are set.

The output data address 93f of the AND logic node 93 is assigned an address on the work memory for temporarily holding the processing result of this logic node.

In the input data address 94b of the output logic node 94, the address on the work memory of the data input to this logic node is set. In this example,
The address of the output data of the AND logic node 93 is set.

In the output data address 94c of the output logic node 94, the address to which the processing result of this control logic is output, that is, the address of the plant control signal s2 on the memory is set. The address of the control signal s2 on the memory is the same signal on the plant data table d2 from the signal name set in the node attribute data of the logic edit data d3, as in the case of obtaining the input data address of the input logic node. The name is searched and the detected position, that is, the bias from the head of the table is obtained and set.

The name of the control logic is assigned to the file name that outputs the evaluation logic data d4.
However, since the file name of the logic edit data d3 is also the name of the control logic, another directory or file name is given a different extension so that it can be distinguished.

Next, the creation of the evaluation execution order data d5 will be described. It is assumed that the logic edit data d3 has a plurality of control logics in one control system, and these control logics have a causal relationship in input / output data. Therefore, the data conversion unit a2 determines the execution order of each control logic so as to obtain consistency within one control system, that is, one cycle of the online processing for evaluation, and outputs the evaluation execution order data d5. .

To determine the evaluation execution sequence, the input / output data of the control logic is searched from the file of the evaluation logic data d4. For example, assuming that the control logic being searched is the control logic A, if the output data of another control logic B is used for the input data, the control logic A performs online processing after the control logic B. And On the contrary, if the output data of the control logic A is used as the input data of the other control logic C, the control logic A orders the execution so that the online processing is performed before the control logic C. This is the entire file of the evaluation logic data d4 (control logic)
Are searched and ordered, and the determined contents are output to a file as evaluation execution order data d5.

FIG. 13 shows an example of the evaluation execution order data d5. Control logics B, A, C ... In FIG.
Respectively correspond to the control logic of the evaluation logic data d4, and the online processing in the logic processing unit a3 is performed according to the execution order of the evaluation logic data d4.

Next, the creation of the screen display data d6 will be described. The data conversion unit a2 uses the logic edit data d
The information for graphically displaying the control system on the screen of the computer is extracted from 3, and the information to be displayed as the processing result of each logic node of the control system is added to this and output as screen display data d6.

FIG. 14 shows an example of the structure of the screen display data d6. In the screen display data d6 shown in FIG. 100 is the node NO. Of the logic edit data d3 shown in FIG. Corresponds to 80. Similarly, the node name 10 of the screen display data d6 in FIG.
1, screen coordinate 102, label 103, label coordinate 104
Are the node name 81, screen coordinates 82, node attribute data (2) 88 of the logic edit data d3 of FIG.
It corresponds to the label coordinate 89. These pieces of information are used to graphically display the control system / control logic on the computer screen.

In addition to this, the screen display data d6 has a display update data address 105, a unit 106, and a display format 107. These pieces of information are used to display the processing result processed online for control system evaluation on the control system / control logic displayed on the screen.

The display update data address 105 includes the output data address 90c of the evaluation logic data d4,
The contents of 91c, 92c, 93f, and 94c (see FIG. 12) are set. Also, unit 106 and display format 1
07 is the name of the signal included in the node attribute data of the logic edit data d3 (node attribute data 87 of FIG. 8).
The contents of the unit 71 of the same signal and the display format 72 (see FIG. 7) of the plant data table d2 are searched and set through. When the logic node is an analog input / output node, the update data address 105, the unit 106, and the display format 107 display the processing result of the node in a predetermined unit and a predetermined format in the vicinity of the logic node, and update it at any time. To be done.

Next, the creation of screen development data will be described. In this embodiment, the control logic is displayed on the screen of the computer, and this control logic has a continuous relationship with other control logic, and the user of this device refers to the other control logic as needed. There are things you have to do. In preparation for such a case, the data conversion part a2, if there is a control logic at the input or output of the input / output node of each control logic, expands the menu data for expanding to the screen of the control logic to the screen expansion data. Create as d7.

FIG. 15 shows the structure of the screen development data d7. 15, node NO. 110,1
Reference numerals 14 and 117 correspond to the input / output nodes of the screen display data d6. In the screen menu item number 111, the number of expandable screens, that is, the number of control logics connected to the logic node is set.

Menu items 112, 113, 116, 1
The name of the control logic obtained from the connection relation between the control logics obtained at the time of creating the evaluation execution order data d5 is set in 19.

The evaluation logic data d4 and the evaluation execution sequence data d5 are input to the logic processing section a3, and the logic processing section a3 takes in the process signal s1 online and performs control processing based on these data. Online processing in the logic processing unit a3 will be described below.

FIG. 16 shows the flow of online processing in the logic processing section a3. To start the online processing, first, a file of all control logics of the evaluation logic data d4 is input (step 200), and then the evaluation execution sequence data d5 is input (step 210).
Next, subsequent online processing is started for the evaluation logic data d5 according to the execution order of the control logic set in the evaluation execution order data d5 (step 22).
0). In the online processing, first, the input data of the logic node is input from the input data address set in the evaluation logic data d4 (step 230), and then the processing unique to the logic node is performed using this input data (step 240). As the processing unique to the logic node, for example, if the AND logic node, all the input data are TRUE, the processing result is TRUE, and the other processing procedure is FALSE. There is.

After the processing unique to the logic node is completed, the processing result is output as output data to the memory address indicated by the output data address set in the evaluation logic d4 (step 250). At this time, if the output data address points to the address of the plant control signal s2, the processing result of the logic node is output as the plant control signal s2.

Next, it is judged whether or not the processed logic node is the last logic node in the control logic (step 260), and if it is not the last logic node, the process proceeds to the processing of the next logic node and the last logic node. If so, the processing of the next control logic is started (step 270).

Steps 220 to 270 described above
The processes up to are repeated periodically, whereby the latest control processing result is always output for the latest plant state. The processing result of this control processing is the screen display part a4.
Then, the person who constructed the control system can confirm what kind of control the constructed control system performs on the actual plant. The screen display on the screen display portion a4 will be described below.

Screen display data d6 created by the data conversion unit a2, screen development data d7, and node data d
1 and the output data of the logic processing unit a3 are input to the screen display unit a4. The screen display portion a4 displays the shape data of the node data d1 corresponding to the node name 101 (see FIG. 14) of the screen display data d6 at the coordinates set in the screen coordinates 102. Also, the screen display data d
Based on the grid line data stored in 6, the grid lines between the logic nodes are displayed. Further, the label of the logic node set in the label 103 of the screen display data d6 is displayed at the coordinate set in the label coordinate 104.

Next, the processing result of the logic processing unit a3 is input from the memory address set in the display update data address 105 of the screen display data d6, and the value is displayed in the vicinity of the logic node according to the unit 106 and the format 107. .

17 and 18 show examples of screen display by the screen display section a4. Of these, FIG. 17 is an example of control logic by digital control, and FIG. 18 is an example of control logic by analog control.

In the screen of the digital control logic of FIG. 17, the input / output logic nodes are the input / output logic nodes of the digital signal, and the logic processing results 120, 121, 122, 1 below these input / output logic nodes.
23 is displayed as ON or OFF, respectively.

In order to facilitate the confirmation, the color of the display of the grid lines 124 and 125 on the output side of the logic node in the ON state may be changed to show the established state of the signal.

In the screen of the control logic for analog control in FIG. 18, the input / output logic node shows the input / output of the analog signal.
It is an output logic node, and the logic processing results 130, 132, 139 under the output logic node are the unit 13
1, 133, and 140 are displayed in the output format designated by the display format 107 (screen display data 26, see FIG. 14).

This makes it possible to check the signal value input / output to / from the input / output logic node, and
For intermediate logic nodes other than the input / output logic nodes, the processing result 134 of each logic node,
Since 135, 136, 137, and 138 are displayed on the output side of each logic node, the process progress value of the logic can be grasped.

The processing result of the logic node is updated at the same time as the processing result is updated in the logic processing unit a3, and the latest control result for the latest plant state is always displayed.

Next, the screen development on the screen display section a4 will be described. The screen display part a4 displays the screen development data d7.
Enter to use as menu data for screen development.
FIG. 19 shows a screen development menu 141 displayed for a predetermined logic node. When a logic node (an output logic node in the illustrated example) is selected with the mouse, the screen display section a4 displays the screen development data d7.
Refer to the corresponding logic node of, the number of screen menu items,
The screen development menu 141 is displayed according to the contents set in the menu item (see FIG. 15). By selecting the displayed menu item with the mouse, another control logic related to the logic node is displayed on the screen.

[0082]

As is apparent from the above description, according to the control system construction apparatus of the present invention, a person who intends to construct a control system uses the drawing / data input function of the logic editing unit to execute the node data of the logic node. Since the control logic can be graphically and visually edited by using the and plant data, it is relatively easy to construct a homogeneous control logic / control system by eliminating the influence of the skill of the creator. You can

Further, the control system construction apparatus according to the present invention has a logic processing section and a screen display section, and the logic processing section makes online the process data of the actual plant to the control logic edited by the logic editing section. Enter with
Control processing is performed and the processing result is output to the screen display unit. On the other hand, the screen display unit graphically displays the edited control logic on the screen of the computer, and displays the processing result of the logic processing unit including the processing of the intermediate logic node on the screen in real time.

A person who constructs the control system by the actions of both the logic processing section and the screen display section determines whether the constructed control system performs the desired control for the process data of the actual plant. It can be evaluated in detail, including the processing of logic nodes, and can be easily modified or changed if necessary.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration and a data flow of a control system construction device according to the present invention.

FIG. 2 is a diagram showing an example of an editing screen by a logic editing unit.

FIG. 3 is a diagram showing a transition of an editing screen during connection of a bridge line in a logic editing unit.

FIG. 4 is a diagram showing an example of editing a plurality of related logic nodes as a block.

FIG. 5 is a diagram illustrating a data setting operation.

FIG. 6 is a diagram exemplifying a data selection screen for selecting data to be set in the data setting work.

FIG. 7 is a diagram showing a configuration of plant data.

FIG. 8 is a diagram showing a structure of logic edit data.

FIG. 9 is a diagram illustrating the relationship between the processing order and the editing order of logic nodes.

FIG. 10 is a diagram showing an example of logic edit data in which logic node data is stored in the edit order.

11 is a diagram showing an example of evaluation logic data obtained by reorganizing the logic edit data of FIG. 10 in processing order.

FIG. 12 is a diagram exemplifying a configuration of evaluation logic data.

FIG. 13 is a diagram showing an example of evaluation execution order data.

FIG. 14 is a diagram showing an example of screen display data.

FIG. 15 is a diagram exemplifying a configuration of screen development data.

FIG. 16 is a flowchart showing the flow of processing in the logic processing unit.

FIG. 17 is a diagram showing a screen of a digital control logic displayed by a screen display unit.

FIG. 18 is a diagram showing a screen of a digital control logic displayed by a screen display unit.

FIG. 19 is a diagram showing a screen in which a screen expansion menu is displayed for a predetermined logic node.

[Explanation of symbols]

 1 Control system construction device a1 Logic editing part a2 Data conversion part a3 Logic processing part a4 Screen display part d1 Node data d2 Plant data table d3 Logic editing data d4 Evaluation logic data d5 Evaluation execution order data d6 Screen display data d7 Screen development data 44 blocks

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hiroshi Miura 8 Shinsita-cho, Isogo-ku, Yokohama-shi, Kanagawa Stock Company Toshiba Yokohama Office

Claims (6)

[Claims] 1. A node data including shape data and attribute data of a logic node of a control logic constituting a plant control system having a drawing function and a data input function on a screen of a computer, and a plant used for plant control. A logic editing unit that edits the control logic into a figure using the data and outputs the logic editing data; and an evaluation unit configured to input the logic editing data and input the process data of the plant for control processing. Screen display for graphically displaying the evaluation logic data consisting of control logic, the evaluation execution order data defining the execution order of the evaluation control logic, and the control logic edited by the logic editing unit on the screen of the computer Data and
A data conversion unit that outputs screen development data for developing from a screen of a predetermined control logic to a screen of a related control logic, inputs the evaluation logic data and the evaluation execution order data, and cycle the process data of the plant. Logic processing unit that outputs the processing result by executing each evaluation control logic by sampling, input the screen display data, the screen development data, and the node data, and enter the plant control system on the computer screen. A control system construction device, comprising a screen display unit for displaying the whole or a part of the plant control system and displaying a processing result of the evaluation control logic by the logic processing unit on the plant control system. 2. The logic editing unit is configured so that it can be edited as a block including related logic nodes based on signal input / output information for each logic node. Control system construction equipment. 3. The data conversion unit edits the logic edit data and outputs evaluation logic data so that processing is performed from an upstream logic node in each control logic. The control system construction device described. 4. The data conversion unit analyzes the input / output relationship between a plurality of control logics constituting one plant control system, and determines the processing order of the control logics so that the control systems are consistent with each other. The control system construction apparatus according to claim 1, wherein the evaluation execution order data is output. 5. The data converter allocates a work memory to the output of each logic node, holds the processing result of each logic node in the logic processing unit on the allocated work memory, The control system construction apparatus according to claim 1, wherein the screen display unit displays a processing result of each of the held logic nodes on a screen. 6. The data conversion unit obtains related control logic from a signal connected to an input / output logic node of each control logic, and outputs screen development data from a connection relationship between the control logics. Claim 1 characterized
The control system construction device described in 1.