JP5498446B2 - Ladder program creation device and ladder program creation method - Google Patents

Description

  The present invention relates to a ladder program creating apparatus and a ladder program creating method that can efficiently create a ladder program for a programmable logic controller from a circuit simulation of equipment simulation.

  In the inspection work of plant control products, it is necessary to confirm that control / monitoring of on-site equipment is performed as designed from the supervisory controller. During this inspection work, there may be a case where all or part of the on-site equipment is insufficient, and in such a case, a simulation operation is performed with a simulator system. A PC (Personal Computer) or a programmable logic controller (hereinafter referred to as “PLC”) is used for the simulator system. Here, PLC is used as a simulator system. In this case, it is necessary to create a ladder program for simulating operation with the PLC.

  As a ladder program creation method, there is a programming device provided with ladder circuit component registration means and ladder program generation means (see, for example, Patent Document 1). In this programming device, a ladder circuit and a symbol name corresponding to an input / output register used in the ladder circuit are defined using means for converting the ladder circuit into parts, and one ladder circuit is registered as a part. After that, it is disclosed that a ladder program is generated by setting a ladder circuit component name and a register number to be used by using a means for generating a ladder program by combining the ladder circuits made into components.

Japanese Patent Laid-Open No. 5-189012

  In Patent Document 1, ladder circuit component registration means symbolizes a relay circuit and registers ladder circuit component data based on a ladder-like figure called “ladder diagram”. However, since the person in charge of the inspection work is not necessarily an expert of the relay circuit, it is a fact that it takes time to create a ladder diagram.

  The present invention is an invention for solving the above-described problems, and provides a ladder program creation device and a ladder program creation method capable of efficiently creating a ladder program for a programmable logic controller from a device simulation circuit diagram. Objective.

  In order to achieve the above object, a ladder program creating apparatus according to the present invention stores a template information (for example, ladder program information based on model information) based on model information of a simulated operation circuit that simulates the operation of a device with an arithmetic circuit (for example, DB 312), a simulated operation device selection unit (for example, simulated operation device selection program 304) for displaying a device selection screen for selecting a device registered in the database, and model information of the selected device. As an operation circuit drawing, a simulated operation circuit drawing creation unit (for example, a simulated operation circuit drawing creation program 305) including a circuit input value definition table, a simulated operation circuit simulated by an arithmetic circuit, and a circuit output value definition table on a display unit. And a simulation operation circuit drawing editing unit (for editing the circuit input value definition table or the circuit output value definition table described in the simulation operation circuit drawing ( For example, when a ladder program creation request is received based on the simulated operating circuit drawing editing program 306) and the edited simulated operating circuit drawing, the drawing information edited by the simulated operating circuit drawing editing unit and the template registered in the database Compared with the information, the change information is extracted from the difference, and based on the extracted change information, the simulated action ladder program creation unit (for example, the simulated action ladder is created) is reflected in the ladder program information and creates a simulated action ladder program file. And a program creation program 307).

  According to the present invention, it is possible to efficiently create a ladder program for a programmable logic controller from a device simulation circuit diagram.

It is a figure which shows the structure of the electronic drawing production apparatus in embodiment of this invention. It is a figure which shows an example of the database of pattern registration of simulated operation circuit drawing information and ladder program information. It is a figure which shows the flow of the ladder program creation of apparatus simulation operation | movement. It is a figure which shows an example of a process of the simulation operation | movement apparatus selection program. It is a figure which shows an example of a process of the simulation operation circuit diagram creation program. It is a figure which shows an example of simulation operation | movement circuit drawing. It is a figure which shows an example of the input value edit of simulation operation circuit drawing. It is a figure which shows an example of a process of the simulation operation | movement ladder program creation program. It is a figure showing an example of the pattern of the simulation operation circuit drawing of an apparatus, and the simulation operation ladder program (mnemonic format). It is a figure which shows an example of the simulation operation | movement circuit drawing of the apparatus which added the edit to FIG. 9, and a simulation operation ladder program. It is a figure which shows an example of a private power generation / commercial power supply switching circuit. It is a figure which shows an example of the function block diagram of FIG. It is a figure which shows the procedure of ladder program creation from a simulation operation circuit.

Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings.
FIG. 1 is a diagram showing a configuration of an electronic drawing creation apparatus according to an embodiment of the present invention. The electronic drawing creation apparatus 100 (ladder program creation apparatus) includes a control unit 301, an output unit 302, an input unit 303, a storage unit 311, and a DB (Data Base) 312 (external storage device). The control unit 301 is realized by a CPU (Central Processing Unit) and has a function of executing various programs stored in the storage unit 311. The output unit 302 is a display or the like, and displays an electronic drawing or the like. The input unit 303 is a keyboard, a mouse (pointing device), or the like. The mouse is used to indicate a display object output to the output unit 302, and the keyboard is used for character input when creating an electronic drawing. The storage unit 311 has a function of holding various programs executed by the electronic drawing creation apparatus 100 and temporary data. The DB 312 has a function of storing various data for the electronic drawing creation apparatus 100 to execute processing.

  The storage unit 311 has a simulated operation device selection program 304 (simulation operation device selection unit) for selecting a simulation operation device registered in the DB 312, and outputs the selected simulation operation circuit drawing to the output unit 302. Simulation operation circuit drawing creation program 305 (simulation operation circuit drawing creation unit), simulation operation circuit drawing editing program 306 (simulation operation circuit drawing editing unit) for editing the drawing output to the output unit 302, registered drawings and Simulated motion ladder program creation program 307 (simulated motion ladder program creation unit) for creating a ladder program relating to the edited drawing, simulated motion device registration program 308 (simulated motion device registration unit) for registering simulated motion devices in the DB 312 ) Is stored.

  The DB 312 stores CAD (Computer Aided Design) simulated operation circuit drawing information 321 (model information) registered by the simulated operation device registration program 308 and ladder program information 322 created by the simulated operation ladder program creation program 307. The The DB 312 stores the edited simulated motion circuit diagram 101 edited by the simulated motion circuit diagram editing program 306 and the edited simulated motion ladder program file 102 created by the simulated motion ladder program creation program 307. .

  FIG. 2 is a diagram showing an example of a pattern registration database of simulated operation circuit drawing information and ladder program information. As shown in FIG. 2, the person in charge of the inspection work registers the patterns of the simulated operation circuit drawing information 321 and the ladder program information 322 in the DB 312 in advance using the simulated operation device registration program 308 and the simulation operation ladder program creation program 307. doing. Detailed description of the simulated operation circuit drawing information 321 (see FIGS. 11 and 12) and the ladder program information 322 (see FIG. 13) will be described later.

Next, a ladder program creation process of the electronic drawing creation apparatus 100 will be described.
FIG. 3 is a diagram showing a flow of creating a ladder program for device simulation operation. This will be described with reference to FIG. When the ladder program creation processing system of the electronic drawing creation apparatus 100 is activated, a simulated motion device list is acquired from the DB 312 and a simulated motion device selection screen 403 (see FIG. 4) is displayed on the output unit 302 (step S31). A user (for example, a person in charge of inspection work) selects a device (step S32). The system acquires simulated operation circuit drawing information 321 of the selected device from the DB 312 and creates the simulated operation circuit drawing 101 (step S33). The simulated operation circuit diagram 101 includes a simulated operation circuit diagram and circuit input values. The user edits the circuit input value described in the simulated operation circuit drawing 101 (step S34). When the system receives the ladder program creation request, it acquires the ladder program information 322 of the simulated motion device from the DB 312, acquires the circuit input value of the simulated motion circuit drawing 101, and creates the edited simulated motion ladder program file 102. This is performed (step S35).

Details of the processing of each step will be described with reference to FIG. 1 as appropriate.
FIG. 4 is a diagram illustrating an example of processing of the simulated operation device selection program. When the control unit 301 detects that the system is activated, the control unit 301 operates the simulated operation device selection program 304 and starts a process of displaying the simulation operation device selection screen 403 on the display unit of the output unit 302. The control unit 301 acquires a list 402 of devices that perform simulation operations registered in the DB 312. The control unit 301 displays a simulated operation device selection screen 403. The list of the combo box on the simulated operation device selection screen 403 is composed of the acquired list of devices that perform the simulated operation. The user selects a device to be simulated from the combo box list and presses the OK button. Then, when the control unit 301 detects that execution has been pressed, the control unit 301 creates a selected device list 404 and proceeds to processing of the simulated operation circuit drawing creation program 305.

  FIG. 5 is a diagram illustrating an example of processing of the simulated operation circuit diagram creation program. After creating the selected device list 404, the control unit 301 operates the simulated operation circuit drawing creation program 305, and the drawing information of the simulated operation circuit of the selected device that performs the simulated operation from the DB 312 in which the device pattern is registered. 502 (for example, symbol and position information on the drawing) is acquired, and the simulated operation circuit drawing 101 is created. Here, in the simulated operation circuit diagram 101 to be created, one or a plurality of input addresses of the PLC are described, and an arithmetic circuit that operates using the register stored value of the input address as the circuit input value is drawn. In addition, the address of the register to which the calculation result is output is drawn by the calculation. The simulated operation circuit diagram 101 also describes the stored value of the input address register. The arithmetic circuit is a circuit for performing arithmetic operations such as four arithmetic operations and logical operations.

  FIG. 6 is a diagram illustrating an example of a simulated operation circuit diagram. A simulated operation circuit diagram 101 shown in FIG. 6 is a diagram showing a part of a simulated operation circuit of a valve. The simulated operation circuit diagram 101 includes a circuit input value definition table 601, a simulated operation circuit 602, and a circuit output value definition table 603. The present embodiment is characterized in that the simulated operation circuit 602 is configured by an arithmetic circuit instead of a conventional ladder circuit.

  The circuit input value definition table 601 is composed of a description of an input value in the first column, an input value in the second column on the right side thereof, and an internal address corresponding to the input value. The input value is described as a constant (input value constant) or an address (input value address). When the input value address is described, the register stored value of the input value address becomes the input value. A box written L on the right side is a symbol indicating the PLC internal address. The corresponding internal address is written on the right side of the symbol. For example, the first row of the circuit input value definition table 601 is an internal address R103, and “operation conditions” and an input value address R127 are designated as input values.

  The simulated operation circuit 602 is configured to store an input value connected to an internal address defined in the circuit input value definition table 601. The first line of the circuit input value definition table 601 will be described as an example. The internal address is R103, which is indicated by a symbol, and is connected to the first line of the circuit input value definition table 601. The register stored value of the input value address R127 is assigned to the internal address R103. In this example, an input value address whose initial alphabet is “R” is a bit address, and a register storage value is “1” (indicating ON) or “0” (indicating OFF). If “1” (indicating ON) is stored in the register of the input value address R127, “1” (ON) is also stored in the register of the internal address R103. The input value is described as “operating condition”. That is, “1” (ON) stored in the register of the input value address R127 indicates that the “operating condition” signal of the valve is ON.

  The simulated operation circuit 602 is configured by an arithmetic circuit, and symbols indicating the internal addresses R103, R104, DW105, and DW106 of the simulated operation circuit (arithmetic circuit) are connected to the left side, and the register stored value of each address Is the input value. The simulation operation circuit 602 performs an operation, and the result is output to the register of the internal address R107.

  The circuit output value definition table 603 describes output values, and a symbol indicating the internal address R107 is connected to the left side. The register stored value of the internal address R107 becomes the output value. The output value (register stored value of the internal address R107) is described as “operation”. For example, when “1” (ON) is stored in the register of the internal address R107, it indicates that the “operation” signal of the valve is ON. In FIG. 6, when “1” is stored in the register of the internal address R107, it means that the operation is started.

  FIG. 7 is a diagram showing an example of input value editing of the simulated operation circuit diagram. When the user needs to edit the circuit input value of the simulated operation circuit drawing 101 or when there is no description in the input value, the user clicks the circuit input value definition table 601 of the displayed simulated operation circuit drawing 101 with a mouse or the like. Then, the simulated operation circuit diagram editing program 306 is activated, and a dialog 701 is displayed on the output unit 302.

  More specifically, “fully open value” in the circuit input value definition table 601 is set to “10”. If the user wants to edit the fully open value to another value, click “10”. When the control unit 301 detects a click, it activates the simulated operation circuit drawing editing program 306 and displays a dialog 701 as means for editing “10” of “full open value”. In the dialog, “10” of “full open value” is prepared in the text box of the input value constant and can be edited. If you want to change this value to a value stored in another register instead of a constant value, select the radio button for the input value address. Then, the text box of the input value address becomes usable, and the address can be input. Click the OK button when you are finished editing. The control unit 301 reflects the change of the circuit input value in the simulated operation circuit drawing 101. When the circuit output value definition table 603 is clicked, a dialog is similarly displayed on the output unit 302 as an editing screen.

  FIG. 8 is a diagram illustrating an example of processing of the simulated motion ladder program creation program. When the user finishes editing the simulated operation circuit diagram 101 displayed on the output unit 302 and the control unit 301 detects that a registration button (not shown) is pressed, the control unit 301 activates the simulated operation ladder program creation program 307.

  Simulated Operation Circuit FIG. 101 is a simulated operation circuit diagram of the device after being edited by the simulated operation circuit drawing editing program 306. The control unit 301 (simulated motion ladder program creation program 307) creates edit information 802 that is input value change information of the simulated motion circuit drawing 101. In addition, the control unit 301 acquires ladder program information 804 of a device that performs a simulated operation from the DB 312. The control unit 301 reflects the editing information 802 of the simulated operation circuit drawing in the ladder program information 804 of the device that performs the simulated operation, and creates the simulated operation ladder program file 102.

  FIG. 9 is a diagram illustrating an example of a simulated operation circuit diagram of a device and a pattern of a simulated operation ladder program (mnemonic format). FIG. 10 is a diagram illustrating an example of a simulated operation circuit diagram and a simulated operation ladder program for a device that has been edited in FIG. The simulated operation circuit diagram 901 and the simulated operation ladder program file 902 shown in FIG. 9 are based on the template information registered in the DB 312 shown in FIG. A simulated operation circuit diagram 1001 shown in FIG. 10 is obtained by changing the portion surrounded by a dotted line from the simulated operation circuit diagram 901 shown in FIG.

  The simulation operation ladder program creation program 307 processes the simulation operation circuit diagram 1001 shown in FIG. 10 and the model information of the simulation operation circuit diagram 901 registered in the DB 312 to create the input value change information 1002 from the difference. To do. Then, the simulated motion ladder program creation program 307 acquires a simulated motion ladder program file 902 which is template information registered in the DB 312, and the simulated motion ladder program creation program 307 uses the input value change information 1002 as simulated motion ladder. Reflecting it in the program file 902, a ladder program file 1003 is created. This process has an effect that a ladder program file can be created more efficiently than a ladder program is created from the beginning.

Next, pattern registration of the simulated operation circuit of the device will be described using a specific circuit.
FIG. 11 is a diagram illustrating an example of a private power generation / commercial power supply switching circuit. A simulation operation circuit diagram 101 shown in FIG. 11 includes a circuit input value definition table 601, a simulation operation circuit 602, and a circuit output value definition table 603, similar to that shown in FIG. 6.

  The simulated operation circuit 602 includes symbols and connections, and a user prepares a circuit that flows from the left (input) to the right (output) via the simulated operation device registration screen (for example, the output unit 302). Created by combining various symbols. The ladder program to be converted into is determined and defined, and the symbol has an attribute. The attribute has “calculation order” and defines the analysis order for conversion to the ladder program. A small number (for example, 201, 202, 203) drawn near the symbol is the calculation order.

  In the simulated operation circuit 602, the one with a circle on the right side of the vertical bar is an OR symbol. If at least one of the input signals has a value of “1”, “1” is output. Otherwise, “0” is output. Similarly, a vertical bar on the right side of the vertical bar is an AND symbol. If at least one of the input signals has a value of “0”, “0” is output, otherwise “1” is output. Similarly, a symbol with □ in a square is a NOT symbol, and “1” is output if the input signal has a value of “0”, and “0” is output otherwise. Similarly, “S”, “R”, and “F / C (SR)” in □ are flip-flop symbols, and the signal input to the “S” side of □ is “1” and If the signal input to the “R” side is “0”, “1” is output. If the signal input to the “S” side of “□” is “0” and the signal input to the “R” side is “1”, “0” is output.

  The circuit input value definition table 601 defines an address to be assigned to the input portion of the operation circuit. The alphabet and numbers drawn on the right side of the symbol “L” indicate the internal address for input. ing. The circuit output value definition table 603 defines an internal address to be assigned to the output part of the operation circuit. The alphabet and the number drawn on the right side of the symbol “L” indicate the internal address for output. Show.

  Of the three circuits shown in FIG. 11, the bottom one will be described as an example. Assume that the address R00A has a value “1”, R008 “0”, and R009 “0”. First, R00A and R008 are input to the OR symbol. “1” is output from the OR symbol. Further, this output result is input to the “S” side of the flip-flop symbol, and R009 is input to the “R” side of the flip-flop symbol. “1” is output from the flip-flop symbol. The value “1” output from the flip-flop symbol is output to R00C. The value “1” output from the flip-flop symbol is input to the NOT symbol. “0” is output from the NOT symbol. The value “0” output from the NOT symbol is output to R00B.

FIG. 12 is a diagram illustrating an example of the function block diagram of FIG. The control circuit shown in FIG. 12 shows an example of a double throw type magnetic contactor (MCDT), and is used for a power receiving / transforming facility of a plant. For example, it is used when the electricity flowing to the power source of one system facility is switched from a commercial power source to private power generation at the time of a power failure to prevent the entire plant from stopping. Moreover, at the time of subsequent electricity restoration, switching from a private power source to a commercial power source is performed.
In particular,

  In the drawing shown in FIG. 12, the simulated operation circuit 602 portion of the simulated operation circuit diagram shown in FIG. 11 is regarded as a standard form and is represented by a function block diagram (FBD). In FIG. 12, the circuit input value definition table 601, the simulation operation circuit 602, and the circuit output value definition table 603 correspond to the input circuit 601A, the operation circuit 602A, and the output circuit 603A, respectively. In the input circuit 601A and the output circuit 603A, a double-line square symbol is connected to the function block (FB) by connection, and an address is assigned to this symbol (not visible in the drawing). )

  FIG. 13 is a diagram showing a procedure for creating a ladder program from the simulated operation circuit. FIG. 13A is a drawing of a part of the simulated operation circuit 602. FIG. 13B is a definition file of a ladder program of a symbol 1301 representing AND in FIG. 13A. Is an example of a ladder program resulting from compilation.

The process of the simulated operation ladder program creation program 307 is as follows.
(1) Acquisition of processing target sheet: Acquires sheet information instructed as a processing target of logic compilation on CAD. Also, it is checked whether or not the sheet has been updated since the previous compilation. If there is no update, the compilation process is skipped.
(2) Logic analysis: The calculation order of each symbol is determined according to a specific rule. It also assigns addresses to input / output symbols.
(3) Language source generation: A program is generated based on a logic analysis result. Each symbol and connection information is analyzed based on the calculation order determined by the logic analysis. The ladder program into which each symbol is converted is described in a definition file (see FIG. 13B), and a ladder program is created based on the definition. A line starting with a semicolon (;) shown in FIG. 13B is a comment line.
(4) Management file generation: A compilation history is recorded.

  According to the present embodiment, the ladder program creation device (for example, the electronic drawing creation device 100) has the simulated motion device registration unit (for example, the simulated motion device registration program 308), and the registration screen ( For example, the output unit 302) includes, as the circuit input value definition table 601, an input value input as an address or a constant, a description of the input value, and an input internal address corresponding to the input value. The circuit output value definition table 603 in FIG. 101 includes an output internal address corresponding to the output value and the name of the output value. The simulated operation circuit 602 in the simulated operation circuit drawing 101 includes an input internal address and an output value. Template information (for example, simulated operation circuit drawing information 321) based on input information input to the registration screen is configured including an internal address and an arithmetic circuit. It can be registered in the DB312.

  According to the present embodiment, the simulated operation circuit 602 displayed on the registration screen of the simulated operation device registration unit is created by combining a circuit to be calculated flowing from left to right with symbols and connections prepared in advance. In the DB 312, the ladder program to be converted into a symbol is defined. The symbol has an attribute that is an operation order, and an analysis order for conversion into a ladder program is defined.

100 Electronic drawing creation device (ladder program creation device)
101 Simulation Operation Circuit Drawing 102 Simulation Operation Ladder Program File 301 Control Unit 302 Output Unit (Registration Screen)
303 Input unit 304 Simulation operation device selection program (simulation operation device selection unit)
305 Simulation operation circuit drawing creation program (simulation operation circuit drawing creation unit)
306 Simulated operation circuit drawing editing program (simulated operation circuit drawing editing section)
307 Simulated motion ladder program creation program (simulated motion ladder program creation part)
308 Simulated motion device registration program (simulated motion device registration unit)
311 storage unit 312 DB (database)
321 Simulated operation circuit drawing information (model information)
322 Ladder program information 403 Simulated operation device selection screen 601 Circuit input value definition table 602 Simulated operation circuit 603 Circuit output value definition table

Claims (6)

A database for storing model information of a drawing of a simulated operation circuit simulating the operation of the device with an arithmetic circuit, and ladder program information based on the model information;
A simulated operation device selection unit that displays a device selection screen for selecting a device registered in the database on a display unit;
Simulated operation circuit drawing that displays the model information of the selected device as a simulated operation circuit drawing, including a circuit input value definition table, a simulated operation circuit simulated by the arithmetic circuit, and a circuit output value definition table on the display unit The creation department;
A simulated operation circuit drawing editing unit for editing the circuit input value definition table or the circuit output value definition table described in the simulated operation circuit drawing;
When a ladder program creation request is received based on the edited simulated operation circuit drawing, the drawing information edited by the simulated operation circuit drawing editing unit is compared with the template information registered in the database and changed from the difference. A ladder program creation device, comprising: a simulated motion ladder program creation unit that extracts information and creates a simulated motion ladder program file by reflecting the information in the ladder program information based on the extracted change information. The ladder program creation device further includes a simulated operation device registration unit,
The registration screen of the simulated motion device registration unit is:
The circuit input value definition table includes an input value input as an address or a constant, a description of the input value, and an input internal address corresponding to the input value. It consists of the corresponding internal address for output and the name of the output value,
The simulated operation circuit includes the internal address for input, the internal address for output, and an arithmetic circuit.
The ladder program creating apparatus according to claim 1, wherein the simulated operation device registration unit registers the template information in the database based on input information input on the registration screen. The simulated operation circuit displayed on the registration screen of the simulated operation device registration unit is created by combining a circuit to be calculated flowing from left to right and a symbol and a connection prepared in advance. Whether to be converted into a program is defined in the database,
The ladder program creation device according to claim 2, wherein the symbol has an attribute that is an operation order, and an analysis order for conversion to a ladder program is defined. Displays a database for storing model information of a simulated operation circuit that simulates the operation of the device with an arithmetic circuit, ladder program information based on the model information, and a device selection screen for selecting a device registered in the database A simulation operation device selection unit to be displayed on the display unit, a model operation circuit drawing of the model information of the selected device, a circuit input value definition table, a simulation operation circuit simulated by the arithmetic circuit, and a circuit output value definition table A simulated operation circuit diagram creating unit for displaying on the display unit, a simulated operation circuit diagram editing unit for editing the circuit input value definition table or the circuit output value definition table described in the simulated operation circuit diagram, A machine using a ladder program creation device having a simulated motion ladder program creation section for creating a ladder program based on the edited simulated motion circuit diagram A ladder program created a method for simulating the operation,
Upon receipt of the ladder program creation request, the ladder program creation unit compares the drawing information edited by the simulated operation circuit drawing editing unit with the template information registered in the database, and extracts change information from the difference. Then, based on the extracted change information, a simulated operation ladder program file is created by reflecting it in the ladder program information. The ladder program creation device further includes a simulated operation device registration unit,
The registration screen of the simulated motion device registration unit is:
The circuit input value definition table includes an input value input as an address or a constant, a description of the input value, and an input internal address corresponding to the input value. It consists of the corresponding internal address for output and the name of the output value,
The simulated operation circuit includes the internal address for input, the internal address for output, and an arithmetic circuit.
The ladder program creating method according to claim 4, wherein the simulated operation device registration unit registers the template information in the database based on input information input on the registration screen. The simulated operation circuit displayed on the registration screen of the simulated operation device registration unit is created by combining a circuit to be calculated flowing from left to right and a symbol and a connection prepared in advance. Whether to be converted into a program is defined in the database,
6. The ladder program creation method according to claim 5, wherein the symbol has an attribute that is an operation order, and an analysis order for conversion to a ladder program is defined.

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