JP2706472B2 - Sequence program editing method - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sequence program editing method for a PC (programmable controller), and more particularly to a sequence program editing method with improved display contents on a display device.

[Conventional technology]

In order to edit a sequence program on a PC, it is common to display a sequence program in a ladder diagram format on a screen of a display device, and to perform operations such as addition, deletion, and change.

To know the cross-reference information of the contact or coil in the ladder diagram, after interrupting or ending the editing work, add another key operation to display the mnemonic display cross-reference list or ladder diagram format program list. I had to print it out.

[Problems to be solved by the invention]

The ladder diagram is composed of a plurality of nets. Since a large-scale ladder diagram includes a large number of nets, editing work is also difficult and errors are likely to occur. If it is possible to know the cross-reference information of any contact or coil during editing, it is extremely convenient and the time required for editing can be reduced.

However, in the conventional technique, there is no other method than printing out the list as described above, so that the cross-reference information cannot be immediately known.

The present invention has been made in view of such a point,
It is an object of the present invention to provide a sequence program editing method capable of immediately knowing cross-reference information during editing.

[Means for solving the problem]

In order to solve the above problems, the present invention provides a PC sequence program editing method in which a ladder diagram format sequence program is displayed on a display screen of a display device and editing is performed. A sequence program editing method, wherein cross-reference information of any of the above items is displayed on the display screen during program editing.

[Action]

When a specific function key is input while the cursor is placed on a contact or coil in the ladder diagram, cross reference information of the contact or coil on which the cursor is placed is also displayed on the display screen.

〔Example〕

 Hereinafter, an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 shows a display example on a display screen according to the sequence program editing method of the present invention. In the figure, X0.1,
X0.2, X0.3, X0.4, X1.1, X1.2, Y1.1, Y1.2, Y2.1 are logical relay contacts, and G3.1 is a logical relay coil It is. The net number being displayed is shown at the top of the screen. In the display example of FIG. 1, the second net is omitted and only the first net is shown. At the bottom of the screen, the function contents of the function keys are indicated by abbreviations.

In FIG. 1, the cursor is placed on the contact point X0.1 and “CROSS
7 shows a state after a function key having an abbreviation "S" is pressed. “CROSS” is an abbreviation for cross reference, and indicates that it is a key for inputting a cross reference display command. Below the contact X0.1, "WRT-5NET" and "RD-6NET" are used as cross references.
And two contact information (signal information) are displayed. This shows that the X0.1 address is also used in the fifth net and the sixth net. Of these, 6
In the No. 5 net, the address is correctly used as the contact address, but in the No. 5 net, the address is incorrectly used as the coil address.

In FIG. 1, a part of the ladder is shifted to the lower part of the screen in order to prevent the cross-reference display of the contact X0.1 from overlapping the display of the contact X1.1 so that the display of X1.1 is not erased. The state is shown.

FIG. 2 shows another display example according to the sequence program editing method of the present invention. Only the first net is shown on the display screen. The net shown in FIG. 2 is the same as the net shown in FIG. 1, but in FIG.
The state after the cursor is placed on 3.1 and the cross-reference display command is input is shown. In the comment display area on the right side of the screen, two signal information of “RD-10NET” and “WRT-11NET” are displayed as cross references. This indicates that the G3.1 address is also used in the 10th net and the 11th net.

In this way, it is possible to display the cross-reference information of any of a large number of contacts or coils immediately during editing and on the same screen of the display device used for editing work, and proceed with editing while checking. I can do it.

In this embodiment, the ON / OFF state of the contact is displayed by changing the luminance. That is, the contacts in the ON state are displayed brightly and the contacts in the OFF state are displayed dark, so that the situation can be easily grasped.

FIG. 3 is a block diagram of hardware of a program creation device for implementing the present invention and a PC. In the figure, reference numeral 1 denotes a program creation device, not shown, and a microprocessor and RO for editing and display processing.
Built-in M and RAM. Reference numeral 2 denotes a display screen of the CRT display device, on which a sequence program is displayed. Reference numeral 3 denotes a function key for instructing functions such as deletion, change, and cross-reference display. Reference numeral 4 denotes an operation key.

10 is a PC (programmable controller) and 11
Is a microprocessor for controlling the entire PC.
Reference numeral 12 denotes an input circuit which receives an external input signal, converts the signal level, and transfers the signal to a bus. An output circuit 13 outputs an output signal for controlling an external machine or the like to the outside.

 Reference numeral 14 denotes an interface for a program creation device.

The PC 10 includes a ROM 15 and a RAM 16 as memories.

RAM 16 is a sequence that defines the operation of external machines, etc.
The program 19 is stored.
A management program 20 for managing the execution process of the program 19 is stored.

The program creation device 1 is connected to a bus 17 via a communication line 18 and an interface 14.

In the embodiment described above, the independent PC and the program creation device are used, but the sequence
The program editing method is a PC built into the numerical controller
The same can be achieved by using the program creation function.

In the above-described embodiment, the ON / OFF state of the logical relay contact is displayed by changing the luminance on the display screen. However, the ON / OFF state may be displayed by changing the color.

〔The invention's effect〕

As described above, in the present invention, the cross-reference information of any one of the many contacts and coils included in the ladder diagram is immediately displayed on the same screen of the display device used for editing. Therefore, conventional software resources such as a cross-reference list can be used in a more effective format, and the time required to create a sequence program can be reduced.

[Brief description of the drawings]

FIG. 1 is a diagram showing a display example on a display screen according to the sequence program editing method of the present invention, FIG. 2 is a diagram showing another display example according to the sequence program editing method of the present invention, and FIG. And a program creation device for implementing
It is a block diagram of hardware with a PC. 1. Program creation device 2. Display screen of CRT display device 3. Function keys 4. Operation keys 10. PC (programmable controller) 11. Microprocessor 12. Input circuit 13. Output circuit 14. …… Program creation device interface 15 …… ROM 16 …… RAM 17 …… Bus 18 …… Communication line 19 …… Sequence program 20 …… Management program

Continuation of the front page (56) References JP-A-59-125406 (JP, A) JP-A-54-152771 (JP, A) JP-A-62-134726 (JP, A)

Claims (2)

(57) [Claims] 1. A sequence program editing method for a PC in which a sequence program in a ladder diagram format is displayed on a display screen of a display device and editing is performed, wherein a cross reference of any of the contacts and coils of the ladder diagram is provided. A sequence program editing method, wherein information is displayed on the display screen during program editing. 2. The sequence program editing method according to claim 1, wherein the on / off state of the contact is displayed together on the display screen.