JPH0460808A - Display system for sequence program development support device - Google Patents

Abstract

PURPOSE:To correct a program in a short time by not only opening a window on a picture but also displaying a part, which cannot be converted to a ladder diagram, in the window in a logical symbolic language at the time of finding this part in the middle of conversion in the conversion mode. CONSTITUTION:If the part which cannot be converted to the ladder diagram is found at the time of converting a program to the ladder diagram to display it on the screen of a display device 2, a window W is opened on the picture, and the program is displayed in the window in the logical symbolic language. The editing mode is set where the part which cannot be converted to the ladder diagram in the conversion mode is displayed in the window W in the logical symbolic language and the logical symbolic language in the window can be corrected. Thus, it is easy to find the part which cannot be converted to the ladder diagram, and the conversion mode is automatically switched to the editing mode to save trouble, and the program correcting work is performed in a short time.

Description

[Detailed description of the invention] [Industrial application field]

The present invention relates to a display method for a sequence program development support device used when creating or modifying a sequence program for a programmable controller.

[Conventional technology]

Conventionally, sequence program development support equipment (hereinafter referred to as support equipment) equipped with a display has been used to create and modify sequence profuranos (hereinafter referred to as profuranos) for programmable controllers. It is being In many of these support devices, profurano\ is written in logical symbolic language using logical operators, etc., but it is said that the operation of the program is difficult to understand and it is troublesome to check the operation of the developed profurano\. There's a problem. Therefore, it has been considered to convert the profurano\ written in logical symbolic language into a ladder diagram using relay symbols and display it on the display screen. That is, a support device is being considered that has an editing mode for creating a profurano in logical symbolic language and a conversion mode for converting a program written in logical symbolic language into a ladder diagram.

[Problem to be solved by the invention]

In the support device with the above configuration, in the conversion mode, if there is a part in the program code that cannot be converted to a ladder diagram, the conversion to the ladder diagram will not be performed or the conversion will not be possible. Currently, we are dealing with this by displaying a message indicating this. However, if there are parts of the program that cannot be converted to a ladder diagram in conversion mode, the task is to switch to edit mode, find the corresponding part, correct it, and then convert it to a ladder diagram in conversion mode. There is a problem that there are many work steps. Also, since the parts that cannot be converted to a ladder diagram are not displayed in the logical symbolic language program,
There is a problem in that it takes time to find the corresponding location. The purpose of the present invention is to solve the above-mentioned problems, and to make it possible to easily modify the parts that cannot be converted into a ladder diagram when converting a program written in logical symbolic language into a ladder diagram. The purpose of this paper is to provide a display method for a sequence program development support device.

[Means to solve the problem]

In order to achieve the above object, the present invention provides a display of a sequence program development support device having a conversion mode that converts a Siegen program written in logical symbolic language into a ladder diagram and displays it on a display screen. In this method, when a part that cannot be converted to a ladder diagram is found during conversion using the conversion mode, a window is opened on the screen, the part that cannot be converted to a ladder diagram is displayed in logical and symbolic words in the window, and the window is opened. The program is set to an edit mode in which logical and symbolic words can be modified.

[Effect]

According to the above configuration, when converting a program into a ladder diagram and displaying it on the display screen, for parts that cannot be converted to a ladder diagram, a window is opened on the screen and the program is written in logical and symbolic language in the window. This has the advantage that all parts that can be displayed in a ladder diagram are displayed in a ladder diagram, making it easier to understand the operation of the sequence. In addition, parts that cannot be converted to a ladder diagram in conversion mode are displayed in logical symbolic words in the window, and the window is set to edit mode where you can modify the logical symbolic words, so you can convert to a ladder diagram. It is easy to find parts that cannot be modified, and switching from conversion mode to editing mode is done automatically, which saves time and effort, making it possible to modify programs in a shorter time than before. It is.

【Example】

Programmable controller (hereinafter abbreviated as PC)
The sequence program (hereinafter abbreviated as the program) is created by a sequence program development support device (hereinafter abbreviated as the support device) provided separately from the PC. Although there are dedicated devices available as support devices, this embodiment assumes a personal computer using the required interface and software. Programs can be written in ladder diagrams or in logical and symbolic language. Ladder diagrams are easier to understand for users who have handled relay sequences in the field, but using logical and symbolic language is easier to understand. Logical symbolic words are also frequently used because they facilitate logical construction. However, in logical-symbolic language. The behavior of the sequence is not intuitively understandable, so
A conversion mode is provided in the support device to convert a program created in logical symbolic language into a ladder diagram. That is, as shown in FIG. 3, the support device includes a keyboard 1 as an input section through which logical symbolic words and ladder diagrams can be entered, and a display 2 as a display section on which programs and the like are displayed. The operating modes include an editing mode for creating and modifying programs, and a conversion mode for converting programs created in logical symbolic language into ladder diagrams. Profurano created using logical symbolic language＼
When converting a logical symbolic word procla l\(
The source program (source program) or the program (object 1-profurano\) that has been converted into machine code is sequentially read out and converted into drawing data for drawing a ladder diagram. If the profurano can be converted into drawing data, the corresponding ladder diagram is displayed on the display 2, and this operation is repeated until one screen's worth of ladder diagrams is displayed. ] If there is a part of the program that cannot be converted into drawing data while displaying the ladder diagram on the screen, that part of the program is converted into logical symbolic language and the screen of display 2 is displayed as shown in Figure 1. A window W is opened and the corresponding part of the program is displayed in the window W using logical and symbolic language. As above, 1
Once the screen has been displayed, if window W is not open on the screen, the mode will change to edit mode where you can edit the ladder diagram, and if window W is open, window W will be displayed.
In the edit mode, you can edit logical and symbolic words. In this way, you can automatically switch to edit mode, make corrections and changes, and exit edit mode (-
After that, for programs that are not displayed on the screen, the above operation is repeated until the program B is finished. In addition, in the above operation, in both cases where the entire screen is displayed as a ladder diagram and when window W is opened, the mode is switched to editing mode after one screen is displayed or finished. However, when I open window W, I see that there are parts of the program that cannot be converted to a ladder diagram.
At that point, an edit mode for editing logical symbolic words may be set. As mentioned above, when dehacking, the program is converted to a ladder diagram and displayed on the screen of Display 2, and for parts that cannot be converted to a ladder diagram, a window W is displayed on the screen.
, the program is displayed in logical and symbolic language in window W, and the program can be edited. As a result, the parts that can be displayed in a ladder diagram are displayed in a ladder diagram, making it easier to understand the operation of the sequence.
In addition, it does not take much time to switch from conversion mode to editing mode, and it is easier to find the parts that need correction, so the time required for correction work on ProGuerra is significantly longer than in the past. It can be shortened to . By the way, when making corrections or changes to the ladder diagram (6), if the ladder diagram consists of only contacts and coils, the operation will not change even if you insert a contact on either the left or right side of the contact, so you can use general support equipment. Normally, relay symbols can only be inserted to the left of the cursor. However, in ladder diagrams that include differentiating circuits, the operation changes depending on whether the differentiating circuit is on the right or left side of the contact, so if the relay symbol can only be inserted to the left of the cursor, the following problems will occur: will occur. For example, if you try to insert a differential circuit DF as shown in Figures 4(,) to 4(1), the support device with the above configuration requires the operation procedure as shown in Figure 5. I will do it. In other words, as shown in Figure 5 (,), when the cursor C (
Align the diagonally shaded portion) with the contact X4, and insert the horizontal connecting wire to the left side of the contact X4 as shown in FIG. 5(b). Next, Fig. 5<c
) After erasing the vertical connection lines as shown in FIG. 5(d), horizontal connection lines are added as shown in FIG. 5(d), and vertical connection lines are added as shown in FIG. 5(e). Thereafter, a differentiating circuit DF is inserted to the left of the contact X4 as shown in FIG. 5(f). With conventional support devices, if you try to change the ladder diagram from Figure 4(a) to Figure 4(l)), you need to perform five steps, making the operation complicated. The problem arises. Therefore, the relay symbol can be inserted not only to the left but also to the right of cursor C. In this case, for example, when inserting a relay symbol to the left of cursor C, operate the insert key, and when inserting a relay symbol to the right of cursor C, operate the shift key and insert key at the same time. It's good to do that. In this way, the relay symbol can be inserted to the right of cursor C, so for example, to change from Figure 4 (,) to Figure 4 (1), move cursor C to contact X1. After specifying the differentiator circuit DF while placing it on top of
To make a change as shown in Figure 4(d), place the cursor C over the contact X1, specify the differential circuit DF, and then perform the left insertion operation. C
After specifying the differential circuit DF while placing it on the contact X4, the left insertion operation can be performed. As described above, no matter where the relay symbol is inserted, the work can be completed with only one step of operation after moving the cursor C, making it easy to edit the ladder diagram. Also, when editing a program, the ladder diagram may not fit on one screen, but the support device is equipped with a storage area to store ladder diagrams for multiple sides, and only one screen of them can be stored. is now displayed on display 2. Therefore, it is possible to convert a plurality of ladder diagrams into machine codes at a time, or to convert large ladder diagrams that cannot fit on one screen into machine codes. Here, on the display screen of the ladder diagram, as shown in Fig. 6, a pair of left and right bus lines tax, ing. By the way, when a ladder diagram spans multiple screens, it is necessary to know which part of the storage area is being displayed on the screen. Therefore, in this embodiment, as shown in FIG. 6, scale lines are provided at the portions of the left and right bus lines L and b where each connection line to the relay symbol is drawn out, and a storage area is allocated for each scale line. The entire U is numbered serially (0 to 32 in the figure). The portion P of the storage area that is displayed on the screen is 11 scale steps,
When cursor C is moved up or down, the screen scrolls within memory area 1↑. According to this configuration, it is possible to know which position in the storage area is displayed on the screen by the serial numbers provided corresponding to the scale lines, and it becomes easy to create a rI collection of ladder diagrams.

【Effect of the invention】

As described above, when converting a program into a ladder diagram and displaying it on the display screen, the present invention opens a window on the screen and displays logical symbolic parts in the window for the parts of the ladder diagram 1\ that cannot be converted. Since the program is displayed in words, all parts that can be displayed in a ladder diagram are displayed in a ladder diagram, which has the advantage that the operation of the sequence is easy to understand. In addition, parts that cannot be converted to a ladder diagram in conversion mode are displayed in logical symbolic words in the window, and the window is set to edit mode where you can modify the logical symbolic words, so the conversion to a ladder diagram is easy. It is easy to find parts that are not possible, and switching from conversion mode to editing mode is done automatically, which saves time and effort, making it possible to modify programs in a shorter time than before. It is effective.

[Brief explanation of drawings]

Fig. 1 is an explanatory diagram showing an example of screen display showing an embodiment of the present invention, Fig. 2 is an explanatory diagram of the same operation as above, Fig. 3 is a schematic configuration diagram of the same device as above, and Fig. 4 is a ladder diagram of same as above. Fig. 5 is an explanatory diagram showing the editing procedure of a ladder diagram showing a comparative example with Fig. 4, and Fig. 6 shows the entire storage area and screen display area of the ladder diagram in the same example. FIG. 1...Keyboard, 2...Display, W...
window. Agent Patent Attorney Ishi 1) Choshichi

Claims (1)

[Claims] (1) In the display method of a sequence program development support device that has a conversion mode that converts a sequence program written in logical symbolic language into a ladder diagram and displays it on the display screen, the sequence program is converted to a ladder diagram during conversion by the conversion mode. When a part that cannot be converted to a ladder diagram is found, a window is opened on the screen, and the part that cannot be converted to a ladder diagram is displayed in logical symbolic words in the window, and the logical symbolic words in the window can be corrected. A display method for a sequence program development support device characterized by setting the device to an edit mode.