JPS5884306A - Programming device of programmable controller - Google Patents

Abstract

PURPOSE:To enable the setting of no-operation instruction even to the programming of the circuit diagram type, by displaying a circuit symbol in a sequence circuit diagram of a display in response to the operation of a symbol key for the no-operation instruction. CONSTITUTION:A circuit symbol is defined in accordance with a no-operation instruction, and a symbol key is provided to an input device 12 for the no- operation instruction. A programming device 2 of a programmable controller 1 treats the no-operation instruction equivalently to a circuit element. This instruction is contained in a display of a sequence circuit diagram of a display 14 to obtain a source program. This program is made accentable to an object program. As a result, the no-operation instruction is inserted into a step corresponding to a display of the display symbol of the no-operation instruction. Thus the no-operation instruction can be treated even with the programming of a circuit diagram type.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a programming device for a programmable controller, and more particularly to an improvement in a device that allows a user program to be created in the form of a sequence circuit diagram using a CRT display device or the like.

As is well known, in commonly used ladder diagram programmable controllers (hereinafter referred to as PCs), the user program (sequence control program) is created in the form of a relay ladder diagram.
It is converted (automatically or manually) into a set of unit instructions according to a predetermined programming format and stored in the user program memory. Many of the recent medium-sized or larger PCs are equipped with a programming device (programming panel) using a CRT display device or the like so that a user program can be directly programmed in the form of a ladder diagram sequence circuit diagram. In this type of programming device, multiple circuit symbols including circuit elements such as contacts and relays and their connection relationships are defined, and multiple symbol keys and circuit element numbers corresponding to each circuit symbol must be input. The ability to display any ladder diagram type sequence circuit diagram consisting of a combination of circuit symbols on the screen of a CRT display device by operating a key-powered device with a numeric keypad for It basically includes an assembling means for converting the display data of the created sequence circuit diagram into a source program, converting it into an object program, and writing it into the user program memory of the PC main body.

In addition to the above-mentioned functions, in general programming devices, user commands are defined in two-monics that have a one-to-one correspondence with user commands in an object language. By doing this, it is now possible to write user programs directly using the object language.

Furthermore, this type of programming device disassembles a user program or program stored in an object language in a user program memory into a sequence circuit diagram in the form of a ladder diagram, which is a source program.
It has a function to display on the R7 screen.

Figure 1A shows an example of a ladder diagram which is a PC source program as described above, and Figure 1B is a program list representing the ladder diagram in a two-monics format that has a one-to-one correspondence with an object language. . In the following explanation, the method of programming in the form of a ladder diagram as shown in FIG. 1A using the display device of the programming device will be referred to as circuit diagram-style programming.
On the other hand, a format in which a program list as shown in FIG. 1B is directly input using a 2-monique that directly corresponds to an object program is called 2-monique programming.

By the way, in the circuit example shown in FIG.
If you want to set a delay time between when the relay 007 turns on and when the relay 007 turns on, the delay time is set for the Pi! 1[
If it is large, the delay operation can be realized by using a well-known timer instruction. However, the minimum set opening time by the timer instruction is determined by the PC hardware and is relatively large. Therefore, if it is desired to set the input/output delay opening between contact 105 and relay 007 to a very short time, the timer instruction cannot be used. In such cases, no-operation instructions are generally used. As is well known, a no-operation instruction is a type of knee-the-knee instruction, and is an instruction that does not involve logic control of a user program and simply advances a program step by one. Hereinafter, this no-operation instruction will be referred to as a NOP instruction. This N in the user program
If an OP instruction is inserted, when the PC executes it, it will skip one program step from fetching the NOP instruction.
It takes a very short amount of time to proceed with the process.
The above-described timing adjustment between input and output can be performed using the processing time of the NOP instruction, which does virtually nothing. FIG. 1C shows the two-monic program shown in FIG.

An example of a program adjusted using the P command is shown. That is, in this example, the NOP instruction is inserted twice between the LD (105) instruction and the OUT (007) instruction, and the NOP
When the processing time of a command is ΔT, a delay time of 2ΔT is provided between when the contact 105 changes and when the relay 007 changes.

Conventionally, when a user wants to include timing adjustment using a NOP instruction as shown in Figure 1C in a user program, writing or inserting this NOP instruction can only be done by bimonic format programming, and circuit diagram format programming. Then N.

Writing and inserting the P instruction could not be performed. The reason for this is that in conventional PCs, the NOP instruction itself was not considered in connection with the sequence circuit diagram, and was positioned as an instruction related to processing operations inside the PC that were not directly related to sequence control operations. The display device in the device was not configured to display a circuit corresponding to a NOP command in one sequence circuit diagram as a source program.

Therefore, when writing a NOP instruction, bimonic programming must be used, which is very inconvenient. In addition, in conventional programming devices, as mentioned above, there is no NOP instruction as a source program, so the assembling means does not handle NOP instructions, and the disassembling means also does not handle NOP instructions. Even if a NOP instruction actually exists in the program stored in the program memory, when the program is disassembled and displayed on the screen, the existence of the NOP instruction will not appear in the displayed circuit diagram at all. there were.

This invention was made in view of the above-mentioned conventional problems, and its purpose is to make it possible to handle the NOP instruction as one circuit element and to set the NOP instruction even in circuit diagram format programming. An object of the present invention is to provide a programming device for a programmable controller.

In order to achieve the above object, the present invention defines a circuit symbol corresponding to the NOP command, provides a symbol key for the NOP command on a display control key human power device, and responds to the operation of the symbol key for the NOP command. assembling means configured to display the circuit symbol in a sequence circuit diagram on a display device, and converting the display data of the sequence circuit diagram created in this display into an object program as a source program. It is characterized in that it has a NOP instruction conversion means.

Hereinafter, embodiments of the present invention will be described in detail based on the drawings.

FIG. 2 is a block diagram showing the data structure of a programmable controller equipped with a programming device according to the present invention. In the figure, 1 is a programmable controller main body, and 2 is a programming device.

The PC main body 1 basically includes a user program memory 3 in which user programs are stored, an input/output circuit 4 that receives internal input signals and sends out external output signals.
The input/output memory 5 temporarily stores the input/output data of each input/output number corresponding to the input/output circuit 4, and each instruction in the user program memory 1 is sequentially executed at high speed. It is provided with an instruction execution means, etc., which performs arithmetic processing based on the data of the circuit 4 and rewrites the output data of the input/output circuit 4 and the input/output memory 5 with the processing results.

This instruction execution means is constituted by a CPU 6 and a system memory 7 which stores a system program defining its operation and is used as a system working area. Further, the PC main body 1 and the programming device 2 are connected via interface circuits 8 and 9, respectively.

The program console 2 is a CPU that manages the overall control.
10, a system memory 1 including a ROM storing a system program executed by the CPU 10 and a ROM used as a system working memory.
1, a key manual device 12 for giving various operation commands (including display $1111 input) to the programming device [2], a tSRAM 13 storing the same user program as the user program memory 3, and a CRT display device [2]. 1
4.

FIG. 3 shows an example of the key arrangement in the key-operated device 12, and only shows the part related to programming in circuit diagram form, which is the gist of the present invention. In the figure, four keys indicated by 1 are cursor movement keys for moving a cursor for specifying display position 1 displayed on the display device 14. K2 is a symbol key corresponding to each circuit symbol, K21 is the A contact symbol key, K22 is the B contact symbol key, K2S is the relay symbol key, K24 is the horizontal connection symbol key, and K25 is the vertical connection symbol key. This symbol key corresponds to the NOP command of K26, which is the gist of this invention. As shown in the figure, the NOP command has a circuit symbol in which a horizontal line representing a signal line is crossed with a short vertical line in the center, and this symbol is written on the top of the key 26. .

Further, K3 is a group of keys for inputting circuit element numbers, etc., and consists of a numeric keypad and alphabet keys A to F.

In addition, there is a clear key to clear the display.

A write key for instructing program writing, an insert key for instructing program insertion, etc. are provided.

Figure 4 is the key human-powered device shown in Figure 3! This is chart 70 of the display 13111 program for displaying a sequence circuit diagram on the display device f14 in response to the operation of step 12.

Further, FIG. 5 shows the configuration of the display screen in the CRT of the display device [14] along with an example of a sequence circuit diagram. Fifth
As shown in the figure, the display screen has five sections on the horizontal axis (X-axis) and five sections on the vertical axis (Y-axis).
The ring) is divided into 20 sections of 4 sections, and one circuit symbol is displayed in each section. There is a display device in the system memory 11! Areas in which 14 display data are stored are set. The display data area also corresponds to the display screen having 20 sections, 5 horizontally and 4 vertically, so that one group of data can be entered in each section. 6th
The figure shows the configuration of one section of display data area.

Here, a serial chain means a chain in which a plurality of circuit symbols are connected in the horizontal direction. Furthermore, an input terminal refers to the left end of one circuit symbol, and an output terminal refers to the right end of one circuit symbol. An input terminal common chain refers to a chain in which input terminals of multiple circuit symbols with a common X-axis coordinate are connected vertically, and an output terminal common chain refers to a chain in which input terminals of multiple circuit symbols with a common X-axis coordinate are connected vertically. refers to a chain in which output terminals are connected vertically. Flag F1 indicates the end of the input terminal common chain, and flag F2 indicates the end of the output terminal common chain. M
The flowcharts in FIGS. 7A to 7D calculate the mutual connection relationship between the circuit symbol names of each section from the display data of the sequence circuit diagram displayed on the display device 14 by the key human power device 12, and calculate the relationship shown in FIG. This is 70 charts for obtaining connection-related data D4 to D7 in the displayed data. Determining these connection relationships is an intermediate step of the assembling means for obtaining the object program from the display data of the sequence circuit diagram.

FIG. 8 is chart 70 of a conversion program that creates an object program (object string) based on connection relationship data after data indicating the connection relationships between each circuit symbol of the displayed sequence circuit diagram is obtained. .

In the programming device of the present invention, the key human power device f12
26 is provided in the symbol key of the NOP command,
By operating this key 26 at the stage of creating a sequence circuit diagram, the circuit symbol of the NOP command is displayed at the position of the display cursor at that time. In the display example of FIG. 5, the display symbol displayed at the A contact 105j, :MT, X-2, Y-3 is the display symbol of the NOP command, =3. The circuit symbol of the NOP instruction is also displayed at the Y-3 position. In this way, at the display position of Y='3, not only is a circuit that turns on relay 007 when A contact 105 turns on displayed, but also a difference between the command processing of A contact 105 and the command processing of relay 007. The fact that two NOP instructions have been inserted can be displayed in the form of a circuit diagram.

In the object string creation program shown in FIG. 8, display data of an input symbol is detected in routine 806, and if the input symbol is neither an A contact nor a B contact, it is determined NO in routine 8o7 and NO in routine 809. The determination is made and the process proceeds to routine 810. This routine 810 converts the NOP instruction into an object language and stores it in the RAM 13. As a result, when the display example of the sequence circuit diagram shown in FIG. 5 is assembled into an object program by the program shown in FIG.
The instruction has two NOP instructions inserted between it and the (007) instruction.

As explained in detail above, according to the programming device for a programmable controller according to the present invention, a no-operation instruction is treated equally as one circuit element, and this is included in the display of a sequence circuit diagram on a display device. By creating a source program and assembling the program into an object program, the no-operation instruction is inserted into the step corresponding to the display position of the no-operation instruction display symbol. That is, no-operation instructions, which could conventionally only be handled in two-monitor programming, can also be handled in circuit diagram programming, greatly improving the usability of this type of programming device.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an example of a program for explaining conventional problems, FIG. 2 is a block diagram showing the overall schematic configuration of a programmable controller equipped with a programming device according to the present invention, and FIG. The figure shows the key arrangement of the key human power device 12 in FIG. 2, FIG. Figure 6 is a diagram showing the configuration of the screen; Figure 6 is a diagram showing the configuration of display data corresponding to one section of the display screen; Figure 7 is a program for determining the connection relationship between each circuit symbol in the display of a sequence circuit diagram. 70 Chart, Figure 8 shows the program 7 for creating an object program based on the mutual connection relationship data of the displayed sequence circuit diagrams.
It is 0 charts. 1... Programmable controller body 2... Programming device 3...
...User program memory 12...Key Human power device 14...Display device 26...Symbol key for no-operation command Patent applicant Tateishi Electric Co., Ltd. Figure 7A Figure 7B Figure 7 WC Figure 7D

Claims (1)

[Claims] (1) In response to the operation of a key human device having multiple symbol keys corresponding to a predetermined circuit symbol, keys for inputting circuit element numbers, etc., an arbitrary key consisting of a combination of each circuit symbol A programmable device that includes a display device that displays a sequence circuit diagram on a screen, and an assembler that uses the display data of the sequence circuit diagram created on this display device as a source program, converts it into an object program, and writes it into the user program memory. - In the programming device of the controller, a circuit symbol corresponding to a no-operation instruction that essentially only advances the program step is defined, and a symbol key for the no-operation instruction is provided on the key manual device, and the display device is provided with a symbol key for the no-operation instruction. The above-mentioned assembling means has means for displaying the circuit symbol in the sequence circuit in response to the operation of the symbol key of the no-operation instruction, and the above-mentioned assembling means converts the no-operation instruction in the display data into a no-operation instruction of an object language. A programming device for a programmable controller, comprising means for converting.
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