JPH11167407A - Program code display device for programmable controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To display a ladder symbol which an operator can easily view by providing a means for displaying a character code as it is and a means displaying codes except the character code in a bit map graphic corresponding to a display code. SOLUTION: A program code which can be character-represented in a user program 6 is transferred to display character string data 8 as it is. The corresponding display code of a program code which cannot be character-represented in the user program 6 is transferred to display character string data 8 by referring to a user program code conversion table 7. Namely, display character string data 8 are used at the time of displaying the user program 6 on a programming panel 4, character string data which can be displayed are displayed as it is. The corresponding bit map graphic 10 is displayed by allowing the display code which can be displayed to refer to a display code conversion table 9.

Description

DETAILED DESCRIPTION OF THE INVENTION TECHNICAL FIELD OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a program code display device for a programmable controller, and more particularly, to a program code display device that needs to display data that cannot express a program code in characters.

[0002]

2. Description of the Related Art Generally, a program code of a programmable controller of this kind, for example, a ladder symbol (ladder symbol) is used.
A ladder drawing or the like written in a dar symbole is created using a programming tool (hereinafter, referred to as a prom panel). When the program code is edited on the programming panel, it is converted into a ladder symbol and displayed. However, unlike a natural language, the ladder symbol includes a display that cannot be represented as a character. Conventionally, the display of data that cannot be represented by characters uses a display method using two-byte codes, which is a method of displaying Japanese kana and kanji, and adds a symbol that displays a ladder symbol to data for representing kana and kanji. , The symbol corresponding to the ladder symbol was displayed.

[0003]

However, the conventional method described above has a drawback that it cannot be displayed on a personal computer which cannot use a 2-byte code. Therefore, an object of the present invention is to provide a program code display device of a programmable controller capable of displaying a ladder symbol without using a display using a 2-byte code.

[0004]

To achieve the above object, the present invention provides a programmable controller, a programming panel, a transmission line connecting them, and a program code stored in a storage device of the programmable controller. In a program code display device of a programmable controller provided with means for transmitting to a programming panel and means for displaying a program on a programming panel screen, in the storage device of the programmable controller, a program storage unit for storing the program code, When the programming panel displays and edits the program code,
Means for transferring from the programmable controller to the programming panel, means for transferring the program code, which can be written in characters received by the programming panel, directly to display character string data, The program code is converted into a display code using a character code other than a character code for display character string data and transcribed, and when displaying the program code, the character code is displayed using the display character string data. Means to display as it is,
Means for displaying, in addition to the character code, bitmap graphics corresponding to the display code, the program code display device of a programmable controller.

[0005] Since the present invention is configured as described above, it has a remarkable effect that ladder symbols that are easy for the operator to understand can be displayed on all personal computers.

[0006]

Embodiments of the present invention will be described with reference to the drawings. [Configuration] FIG. 1 is a block diagram showing a circuit configuration of an embodiment of the present invention. 1 is a programmable controller, 1a is an input unit, 1b is an output unit, 1c is a CPU (central processing unit), 2 is a programmable controller memory area, 2d is a data memory, and 3 is a user program stored (memory) in the programmable controller. User program storage unit, 4 is a programming panel, 5 is a programming panel memory area, 6 is a user program stored (memory) in the programming panel,
7 is a user program code conversion table, 8 is display character string data, 9 is a display code conversion table, 10 is storage / control means for displaying bitmap graphics, 11 is a display screen, 11a
Indicates a character display, 11b indicates a bitmap graphics display, and 20 indicates a peripheral device.

In the bit map graphics, characters and figures displayed on a CRT display screen are mapped to a frame memory (image memory) for storing the image displayed on the screen as it is in a pixel unit.
It is a means to expand and express it as a bit pattern. According to this expression method, for example, when displaying 800 × 1024 pixels, a video memory of at least 800 × 1024 bits is required. Characters, special symbols, graphic fragments, etc. are stored by the user and the character generator (RO)
Compared to the character display method that converts and expresses a character into a determined bit pattern using M), the expression using multiple intricate windows, the operation of dynamically moving the position of a window, the position where a figure is instantly specified You can freely perform operations such as moving to a new computer. [New microcomputer term dictionary, edited by NEC Corporation Semiconductor Group].

[Operation] A request 12 for transmitting user program data information is transmitted from the programming panel 4 to the programmable controller 1, and the programmable controller 1 receives the request 12 to transmit the user program 3 from the programmable controller memory area 2 to the programming panel. Send to 4. Upon receiving this signal, the programming panel 4 is in the programming panel memory area 5
First, the user program 6 is converted into the display character string data 8.

The character-readable program code in the user program 6 is transcribed as it is to the display character data 8, and the non-character-readable program code in the user program 6 corresponds to the user program code conversion table 7. The display code is transferred to the display character string data 8.

That is, when the user program 6 is displayed on the programming panel 4, the display character string data 8 is used, and the displayable character string data is displayed as it is.
For display codes that cannot be displayed, reference is made to the display code conversion table 9 and the corresponding bitmap graphics 10
Is displayed.

[0011]

As described above, according to the present invention, a ladder symbol which is easy for the operator to understand can be displayed on any personal computer.

[0012] Further, this is an effective means for developing a programming tool corresponding to a multilingual language, and suggests that the invention is effective as an advanced development invention for starting a controller in this area.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a circuit configuration according to an embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Programmable controller 1a Input part (programmable controller) 1b Output part (programmable controller) 1c CPU (central processing unit) 2 Programmable controller memory area 3 User program storage part 4 Programming panel 5 Programming panel memory area 6 User program 7 Character string for display Data 8 User program code conversion table 9 Code conversion table for display 10 Bitmap graphics (storage and control means) 11 Display screen 11a Character display 11b Bitmap graphics display 12 Information transmission request (access signal) 20 Peripheral device

Claims (1)

[Claims] 1. A programmable controller, a programming panel, a transmission line connecting the two, a means for transmitting a program code stored in a storage device of the programmable controller to the programming panel, and displaying a program on a programming panel screen. A program storage device for storing the program code in the storage device of the programmable controller, wherein the programming panel displays and edits the program code. Means for transferring from the programmable controller to the programming panel; and the program code capable of writing characters received by the programming panel is display character string data. Means for transcribing the program code as it is, means for converting the program code received by the programming panel that cannot be represented by characters into a display code using a character code other than a character code for display character string data, and transcribing the program code. When displaying, means for displaying the character code as it is using the display character string data, and means for displaying the character code other than the character code on bitmap graphics corresponding to the display code are provided. And a program code display device of the programmable controller.