JP2022053177A - Sequence program editing device, sequence program editing method, and computer readable storage medium - Google Patents

Abstract

To provide a device that simplifies program editing in creating a sequence program.SOLUTION: A sequence program generation unit 15 assesses a type of a data address "Y0000" for which an indication for automatic program creation has been accepted from a programmer, and assesses that the same is an output data address as a beginning alphabet is "Y." Since size of the "Y0000" is one byte, eight (8-bit) output coils are created in each line of a ladder program.SELECTED DRAWING: Figure 3

Description

The present invention relates to a sequence program editing device, a sequence program editing method, and a computer-readable storage medium.

Sequence control is one of the control methods and is widely used in factories and the like where the same operation is repeatedly executed. A PLC (Programmable Logic Controller) is a controller dedicated to sequence control, and is also called a programmable controller (PC), a sequencer, or a sequence controller.

The PLC memory area includes a system memory, a program memory, a data memory, and the like. The basic PLC software is written in the system memory, and the sequence program created by the programmer is stored in the program memory. When the PLC is RUN, the basic software processes the information from the input unit, calculates the sequence operation according to the sequence program stored in the program memory, outputs the result to the output unit, and executes the sequence control.

To create a sequence program, install dedicated software on a personal computer (PC) or use a program-dedicated device such as a programming console.
Such a sequence program editing device can make various settings and edits related to PLC, such as setting of communication allocation with an input / output device and setting of communication with an industrial network.

The language of the sequence program includes a ladder language, an ST (Strutured Text) language, a knee mock, and the like.

The ladder language is a language in which a sequence circuit diagram is schematized using graphic symbols indicating circuits such as contacts and coils. Ladder programming can be created visually on the screen. For example, in Patent Document 1, a ladder program is created by displaying a list of graphic symbols and arranging circuits on the screen.
The ST language is a text-format programming language, and can describe control such as conditional judgment and repetition by syntax. In the ST language, calculation formulas and the like can be described in a format similar to general formulas, and formulas and calculation formulas can be described concisely.
The ladder language and the ST language are not necessarily independent languages, but there is a "form in which the ladder and the ST language are described in combination", and this is called "inline ST".

Both the ladder program and the ST program are converted into mnemonics and transferred to the PLC. A mnemonic is a machine language program that a PLC can execute. The mnemonic program can be created and edited by the programmer in the same way as the ladder language and ST language.

Japanese Unexamined Patent Publication No. 9-16218

When performing sequence control using PLC, first, I / O allocation is performed. The I / O allocation is to allocate the input / output number of the PLC to which the signal of the machine or the operation panel is connected.

In I / O allocation, a memory map including the I / O device address, the size of the occupied address, the slot number where the I / O device is installed, the comment, etc. is created, and the sequence control is performed on the machine or operation panel. Set which input / output number of the PLC the signal is connected to.
In the I / O allocation, an internal address is assigned. The address assigned to the internal address can be used as a virtual relay in the sequence program. You can also use the internal address to assign an address for communication on an industrial network.

Conventionally, when describing the address or internal address of an input / output device in a sequence program, the data address or graphic symbol displayed on the screen is manually input to the ladder circuit to create a ladder program (for example, Patent Document 1). However, this technique is complicated because it is necessary to set a data address and a data identification name in advance. Even when the ST language is used, the setting of the data address and the data identification name is complicated.

In creating a sequence program, a technique for simplifying program editing is desired.

The sequence program editing device according to one aspect of the present disclosure is a sequence program editing device that edits a sequence program, and includes an I / O allocation setting unit that accepts data address allocation and a sequence program editing unit that accepts sequence program editing. , When the command receiving unit that accepts the automatic program creation command for the data address set in the I / O allocation setting unit and the type of data address that received the automatic program creation command are determined, and the type of data address is the output data address. , A sequence program generation unit that creates a sequence program that outputs a data address.
The sequence program editing method according to one aspect of the present disclosure is a sequence program editing method for editing a sequence program, and is a data address that receives an automatic program creation command for an I / O-assigned data address and receives an automatic program creation command. If the type of data address is an output data address, create a sequence program that outputs the data address.
The recording medium according to one aspect of the present disclosure accepts an automatic program creation command for an I / O-assigned data address by being executed by one or more processors, and determines the type of data address that has received the automatic program creation command. If the judgment is made and the type of data address is an output data address, a sequence program that outputs the data address is created.

According to one aspect of the present invention, program editing can be simplified in the creation of a sequence program.

It is a conceptual diagram of the PC and PLC of this disclosure. It is a figure which shows the hardware composition of the PC equipped with the software for editing a sequence program. It is a block diagram of a PC. It is a figure which shows the I / O allocation screen. It is a figure which shows the automatic creation of a ladder program. It is a figure which shows the ladder program which was made automatically. It is a figure which shows the automatic creation of a ladder program. It is a figure which shows the ladder program which was made automatically. It is a figure which shows the automatic creation of an ST program.

[First disclosure]
Hereinafter, the outline of the present disclosure will be described with reference to the drawings.
In FIG. 1, a personal computer (PC) 1 and a PLC 2 are present. Sequence program editing software is installed in PC1. The programmer creates a sequence program on PC1 and transfers it to PLC2.

PC1 has a hardware configuration as shown in FIG. The CPU 111 included in the PC 1 is a processor that controls the PC 1 as a whole. The CPU 111 reads out the system program stored in the ROM 112 via the bus 122, and controls the entire PC 1 according to the system program. Temporary calculation data, display data, various data input from the outside, and the like are temporarily stored in the RAM 113.

The non-volatile memory 114 is composed of, for example, a memory backed up by a battery (not shown), an SSD (Solid State Drive), or the like, and the storage state is maintained even when the power of the PC 1 is turned off. The non-volatile memory 114 stores data read from the external device 125 via the interface 115, data input via the input unit 124, data acquired from the PLC 2 via the network, and the like. The data stored in the non-volatile memory 114 may be expanded in the RAM 113 at the time of execution / use. Further, various system programs such as a known analysis program are written in advance in the ROM 112.

The interface 115 is an interface for connecting the CPU 111 of the PC 1 and the PLC 2. The sequence program created by PC1 is transferred to PLC2 via the interface 115. The sequence program may be transferred to PLC2 using a portable memory.

The interface 120 is an interface for connecting the CPU 111 of the PC 1 to a wired or wireless network. Industrial machines, fog computers, cloud servers, etc. are connected to the network, and data is exchanged with and from the PC1.

On the display unit 123, each data read on the memory, data obtained as a result of executing the program, etc. are output and displayed via the interface 117. Further, the input unit 124 composed of a keyboard, a pointing device, or the like passes the programmer's input to the CPU 111 via the interface 118.

FIG. 3 is a block diagram of PC1. The PC 1 has an I / O allocation setting unit 11 that accepts I / O allocation settings from a programmer, a sequence program editing unit 12 that accepts sequence program editing from a programmer, and a command reception unit that accepts an automatic program creation command from a programmer. A unit 13, an address attribute information holding unit 14 that stores the attribute information of the data address, and a sequence program generation unit 15 that automatically generates a sequence program based on the attribute information of the data address are provided.

The I / O allocation setting unit 11 displays the I / O allocation screen 20 as shown in FIG. 4, and accepts the I / O allocation setting from the programmer. As shown in FIG. 4, the data address of the input / output device, the size of the data address, and the slot number in which the input / output device is mounted can be set on the I / O allocation screen 20 of the present disclosure. The setting items in FIG. 4 are not limited to this.

The sequence program editing unit 12 displays the sequence program editing screen (ladder editing screen 30 in the first disclosure) and accepts editing of the sequence program (ladder program in the first disclosure).
On the ladder editing screen 30, a ladder editing area for editing the ladder program is displayed.
When writing the output instruction manually, the programmer first selects the graphic symbol of the output coil and displays the output coil in the ladder edit area. Then, the data address of the output coil is selected on the displayed output coil setting screen or the like. When the programmer selects an appropriate data address, the output coil displayed on the screen is associated with the data address. At this time, the programmer adds a comment to the output coil or changes the name of the output coil to an easy-to-understand name as necessary.
In this way, in order to manually describe an output command, it is necessary to repeat screen operations and text input. If the number of output instructions is large, it takes time and effort, which is a burden on the programmer.

The address attribute information holding unit 14 stores the attribute information of the data address. There are various types of PLC2 data addresses. Specifically, there are an output data address, an input data address, an internal data address, a message display data address, and the like. Usually, the alphabet at the beginning of the data address indicates the type of data address. The relationship between the alphabet and the type of data address differs depending on the manufacturer and specifications of the PLC2.

The command receiving unit 13 receives an automatic program creation command from the programmer. In the present disclosure, drag and drop from the I / O allocation screen 20 to the ladder editing area is performed as an automatic program creation command. In the example of FIG. 4, the mouse pointer is dragged and dropped from the data address “Y0000” of the I / O allocation screen 20 to the line number 1 of the ladder editing area.
The method of inputting the automatic program creation command is not limited. You may input by screen operation other than drag and drop, or you may input by gesture or voice.

The sequence program generation unit 15 creates an output command in the ladder editing area according to a command from the programmer. Explaining with reference to FIG. 5, the programmer first instructs the creation of an automatic program by dragging and dropping the mouse pointer from the data address “Y0000” of the I / O allocation screen 20 to the line number 1 of the ladder editing area. ..
When the command receiving unit 13 detects a command from the programmer, the sequence program generation unit 15 refers to the address attribute information holding unit 14 to determine the type of the data address "Y0000". Here, since the first alphabet of the data address "Y0000" is "Y", it is determined that the data address is an output data address. When the data address specified by the programmer is the output data address, the sequence program generation unit 15 refers to the “size” of the I / O allocation. The "size" is "1". In this case, since the "size" is "1 byte", eight (8 bits) output coils are created in each line of the ladder program line numbers 1 to 8.

As shown in FIG. 5, an eight-line ladder program is created in the ladder editing area. An a contact is created on the input side bus of each line, and an output coil of "Y0000.0" to "Y0000.7" is created on the output side bus. The a contact is a dummy contact. In the ladder program, there is a limitation that the contact must be connected to the input bus. In order to satisfy this limitation, a dummy contact is provided to generate an input / output circuit. The dummy contact does not necessarily have to be the a contact.

As described above, in the program editing device of the present disclosure, when the programmer selects the data address set by the I / O allocation, the output coil is automatically arranged and each output coil is associated with the data address.
When manually creating a sequence program, it was necessary to manually perform "selection of graphic symbols" and "correspondence of data addresses" for each output coil, but in this disclosure, the programmer commands it. Since the sequence program is created only by itself, the program editing can be simplified.

Further, the sequence program generation unit 15 may refer to the address attribute information holding unit 14 and change the name of the output coil. FIG. 6 is an example in which the type of data address is reflected in the name of the output coil. The sequence program generation unit 15 reads out the first alphabet of the data address "Y0000" that has received the automatic program creation command. When the first alphabet is "Y", the type of data address is "output to external device". The sequence program generation unit 15 adds "_output" to the name of the output coil. In the ladder program of FIG. 6, the name of the output coil is changed from "Y0000.1_output" to "Y0000.7_output".

Further, the sequence program generation unit 15 may change the name of the output coil arranged in the ladder program by using the content of the comment.
FIG. 7 is an example in which the content of the comment is reflected in the name of the output coil. On the I / O allocation screen of FIG. 7, for the 8-bit data address of “Y0000”, “0: power lamp”, “1: alarm lamp (green)”, “2: alarm lamp (yellow)”, and “3: The comments "alarm lamp (red)", "4: alarm buzzer", "5: standby lamp", "6: cutting lamp", and "7: reserved lamp" are set.
The sequence program generation unit 15 adds the content of the comment to the name of the output coil. In FIG. 7, the names of the output coils are "Y0000.0_power_lamp", "Y0000.1_alarm_lamp_green", "Y0000.2_alarm_lamp_yellow", "Y0000.3_alarm_lamp_red", "Y0000.4_alarm_buzzzer", "Y0000.5_standby_rmp" and "Y0000.5_standby_rmp". Become.
The comment in FIG. 7 includes blank characters and characters that cannot be used as the name of the output coil, such as "()", and the sequence program generation unit 15 of the present disclosure automatically converts these characters into "_". ing. The method of automatic conversion is an example and is not limited to this.

Further, the sequence program generation unit 15 may display the content of the comment near the output coil.
In the example of FIG. 8, the content of the comment is displayed on the line of the ladder program. In FIG. 8, [Y0000.0: power lamp] is placed on the output circuit of “Y0000.0” of “Y0000”, and [Y0000.1: allarm lamp (green)] is placed on the output circuit of “Y0000.1”. , [Y0000.2: alarm lamp (yellow)] on the output circuit of "Y0000.2", [Y0000.3: alarm lamp (red)] on the output circuit of "Y0000.3", "Y0000. [Y0000.4: alarm buzzer] on the output circuit of "4", [Y0000.5: standby lamp] on the output circuit of "Y0000.5", and [Y00000] on the output circuit of "Y0000.6". .6: cutting lamp], the content of the comment [Y0000.7: reserved lamp] is displayed on the output circuit of "Y0000.7".

The unit of "size" and the display method of the data address in the I / O allocation differ depending on the manufacturer and specifications of the PLC2. In the example of the present disclosure, the unit of "size" is 1 byte, but it may be 1 bit. The data address may be a continuous integer such as "Y0000" to "Y0007".

Further, in the present disclosure, the address attribute information holding unit 14 and the sequence program generation unit 15 are separately provided, but the sequence program generation unit 15 may be configured to store the address attribute information.

Further, in the above example, only the output data address to be output to the external device is shown, but the internal data address to be output to the internal device is also included in the present disclosure. Some internal data addresses are used for communication settings of industrial networks. In the present disclosure, the circuit of the output coil is automatically arranged also for the internal data address for communication setting, the output coil and the data address are associated with each other, and the sequence program is automatically generated.

[Second disclosure]
The second disclosure will be described. In the second disclosure, an ST language sequence program (hereinafter referred to as an ST program) is automatically created. The PC1 of the second disclosure and the PC1 of the first disclosure differ only in the type of the sequence program. Therefore, only the sequence program generation unit 15 that generates the program will be described.

The sequence program generation unit 15 creates an ST program on the sequence program edit screen (here, the ST edit screen 40) according to a command from the programmer. In the example of FIG. 9, the mouse pointer is dropped and dropped from the data address “Y0000” of the I / O allocation screen 20 to the ST edit screen 40. Upon receiving a command from the programmer, the sequence program generation unit 15 determines the type of the data address "Y0000" with reference to the address attribute information holding unit 14. The data address "Y0000" is determined to be an output data address because the first alphabet is "Y". The sequence program generation unit 15 refers to the “size” of the I / O allocation when the data address is specified by the programmer. The "size" is "1". In this case, since the "size" is "1 byte", a declaration of eight variables (8 bits) and a calculation formula for calculating the value of each variable are created.
In the example of FIG. 9, the ST edit screen 40 is divided into upper and lower two stages, variables are declared in the upper variable declaration area, and a calculation formula is created in the lower program edit area. In the variable declaration area, an array "in_dammy" consisting of eight Boolean values is declared as a dummy input of the calculation formula, and an array "out_Y0" consisting of eight Boolean values is declared. In this declaration, the eight elements of the array "out_Y0", "out_Y0 [0]" to "out_Y0 [7]", are associated with the data addresses "Y0000.0" to "Y0000.7".

In this example, the sequence program generation unit 15 adds the character "out_" to the first half of the array name. The character "out_" does not necessarily have to be added. “Out_” indicates the type of data address. Since the attribute information of the alphabet "Y" at the beginning of the data address is the output device, the sequence program generation unit 15 adds "out_".

Eight calculation formulas are written in the program editing area. The left side of the eight calculation formulas is an element of the array "out_Y0" declared in the variable declaration area. The right side of the calculation formula is an array "in_dammy" as a dummy input declared in the variable declaration area. An "assignment symbol (: =)" is described between each element of "out_Y0" and "in_dammy". That is, the value of the dummy input "in_dammy" is assigned to the output "out_Y0" (that is, the right side of the calculation formula is input to the output data address).

The sequence program generation unit 15 may add the content of the “comment” of the I / O allocation to the array name or variable name of the ST program, as in the first disclosure. Further, the content of the "comment" of the I / O allocation may be used as it is as the array name or variable name of the ST program.

As described above, the program editing device of the present disclosure automatically creates a sequence program based on the data address set by the I / O allocation. Specifically, the type of the data address is determined from the alphabet at the beginning of the data address assigned to the I / O, and if the type of the data address is an output data address, a sequence program for outputting to the data address is created.

When the sequence program is a ladder program, the program editing device adds one line of the ladder program and arranges the output coil on the output side bus of the added line. The number of output coils corresponding to the "size" of the data address is created, and each output coil is associated with the data address.

When the sequence program is an ST program, the program editing device declares the variable corresponding to the data address in the variable declaration area. A variable is an array of lengths corresponding to the "size" of the data address. Each element of the array is associated with a data address.

The program editing device confirms the attribute information of the data address and adds it to the sequence program. The program editing device determines the attribute information of the data address from the alphabet at the beginning of the data address and adds it to the sequence program.
In addition, the content of the comment of the I / O allocation is added to the sequence program.

1 Personal computer (PC)
2 PLC
11 I / O allocation setting unit 12 Sequence program editing unit 13 Command reception unit 14 Address attribute information holding unit 15 Sequence program generation unit 30 Ladder editing screen 40 ST editing screen 111 CPU
112 ROM
113 RAM
114 Non-volatile memory

Claims (9)

A sequence program editing device that edits a sequence program.
I / O allocation setting unit that accepts data address allocation,
The sequence program editorial department that accepts the edit of the sequence program,
A command receiving unit that receives an automatic program creation command for the data address set in the I / O allocation setting unit, and a command receiving unit.
A sequence program generation unit that determines the type of data address that has received the automatic program creation command and creates a sequence program that outputs the data address when the data address type is an output data address.
Sequence program editing device with. The I / O allocation setting unit accepts the setting of the size of the data address and accepts the setting.
The sequence program editing device according to claim 1, wherein the sequence program generation unit creates a sequence program that outputs a number of data addresses corresponding to the size. The sequence program editing device according to claim 1, wherein the sequence program generation unit reflects the type of the data address in the name of the data address. The I / O allocation setting unit accepts the setting of the comment of the data address, and receives the setting.
The sequence program editing device according to claim 1, wherein the sequence program generation unit displays a comment of the data address in the vicinity of a display area of the data address. The sequence program editing device according to claim 1, wherein the sequence program generation unit outputs a data address that has received the automatic program creation command and creates a sequence program with a dummy contact as an input. The sequence program is a ladder program.
The sequence program editing device according to claim 1, wherein the sequence program generation unit arranges an output coil corresponding to a data address that has received the automatic program creation command on the output side bus. The sequence program is an ST program and is an ST program.
The sequence program editing device according to claim 1, wherein the sequence program generation unit declares a variable corresponding to a data address that has received the automatic program creation command, and creates a calculation formula with the variable on the left side. Editing a sequence program This is a sequence program editing method.
Accepts an automatic program creation command for the data address assigned to I / O,
A sequence program editing method for determining the type of data address that has received the automatic program creation command, and creating a sequence program that outputs the data address when the type of the data address is an output data address. By being executed by one or more processors
Accepts an automatic program creation command for the data address assigned to I / O,
Determines the type of data address that has received the automatic program creation command, and if the type of data address is an output data address, stores a computer-readable instruction that creates a sequence program that outputs the data address. Storage medium.

Images