JPS59148905A - Forming and correcting device of program - Google Patents

Abstract

PURPOSE:To improve the efficiency of the formation and correction of a program by providing the titled device with a means converting various bit operation instruction words constituting an inputted program into symbol codes. CONSTITUTION:Information or the like corresponding to various bit operation instructions or the like is inputted from a key (input part) 1 and an input control and conversion part 2 convertes the respective instructions into machine words. The prescribed instruction words are converted into machine words, which are successively stored in an object code storage part 3. An object/rudder pattern conversion part 4 converts the stored machine words into intermediate codes and an intermediate code storage part 5 stores the information indicating the symbols of respective instruction words and the information indicating coupling relation between the respective symbols. A conversion and display control part 6 converts the information to be displayed, which are stored in the storage part 5, into the set of display elements previously determined at its basic size and shape and applies the set to a display device 7, which displays the symbols of the instruction words.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a device for creating or modifying (hereinafter simply referred to as creating) a program for a programmable controller, for example, and in particular a program creation device for creating a program while displaying the program as a ladder diagram on a display. Regarding equipment. In such devices, the command words that make up the program are pit operation command words (on, like contact signals).
(commands processed in off-signal format) and word operation commands (commands processed in word signal format, such as analog signals) are displayed in the form of a ladder diagram or an equivalent format. It is desirable that it can be displayed on the top.

However, although programs consisting only of bit operation instructions have conventionally been displayed in a ladder diagram format, programs containing only word operation instructions or a mixture of word operation instructions and bit operation instructions cannot be displayed. Since the program is displayed in the form of a source list as shown in FIG. 1, it is difficult to visually check the flow of program processing, and the program creation process therefore takes time and becomes inefficient. Note that FIG. 1 is an explanatory diagram for explaining an example of a list.

The present invention has been made in view of the above, and an object of the present invention is to provide a program creation/modification device with improved program creation/modification functions.

According to the present invention, the above objects include input means for selecting and inputting information corresponding to each of various bit operation instruction words and word operation instruction words constituting a predetermined program; By providing a conversion means that converts the instruction word into a corresponding symbol code in order to display the symbol, it is possible to display a program containing a mixture of bit operation instructions and word operation instructions in a ladder diagram format or an equivalent diagram format. The main point is that it can be created or modified.

Embodiments of the present invention will be described below with reference to the drawings.

Fig. 2 is a block diagram showing an embodiment of the present invention, Fig. 3 is an explanatory diagram explaining examples of display symbols for bit operation instructions and word operation instructions, and Fig. 4 shows a program in a diagram format equivalent to a ladder diagram. FIG. 5 is an explanatory diagram illustrating the relationship between the display symbol of a word operation instruction and the input and output of that instruction. In FIG. 2, 1 is an input section for inputting information corresponding to various bit operation instructions or word operation instructions, 2 is an input control and conversion section for converting each of these instructions into machine language (object code),
3 is a storage unit that stores the object code; 4 is an object-ladder diagram conversion unit that converts the object code into an intermediate code (the number of a display symbol given to a command word); and 5 is an intermediate code that stores the intermediate code. 6 is a storage unit, 6 is a conversion and light display control unit that converts the intermediate code into a set of display elements of symbols corresponding thereto, and 7 is a display (display device).

Now, the program creation operation will be explained with reference to FIGS. 2 to 5.

First, a key on the input unit 1 corresponding to the first command word of a program created by a programmer is operated to input the command word information. The input control and conversion unit 2 analyzes keyed-in information, and if the information corresponds to a command word, stores the information in a buffer memory (not shown). In addition,
In the case of information that does not represent a command word, such as position specification using a cursor key, no further processing is performed. Next, when a start key (not shown) of the input unit 1 is pressed, the contents of the buffer are converted into the corresponding object code and stored at a predetermined address.

Thereafter, the above-mentioned operations are repeated every time an input operation is performed, and therefore, each command word of a predetermined program is converted into an object code and sequentially stored in the storage unit 3. Furthermore, this 4-object code is converted into an intermediate code by the object-ladder diagram conversion section 4 and stored in the intermediate code storage section 5. This intermediate code is a number attached to a display symbol representing each instruction word, and the purpose of attaching such a number to the display symbol of each instruction word is to facilitate its display.

At this time, the code created in the intermediate code storage section 5 is similar to the image displayed on the display. Here, the symbol of the bit instruction word is as shown by the symbol 9 in FIG. 3(a). , is shown with a leader line from its center, while the display symbol of the word command is shown in the same figure (
As shown by reference numeral 10 in a), a lead line is attached from the top. To do this, consider the bit point pb for the symbol corresponding to the bit instruction word, and the word point Pw for the symbol corresponding to the word instruction word, and use this to determine the display position of the latest symbol or the next symbol to be displayed. instruct. For example, when bit point (-) Pb and word point Pw as shown in FIG.
) is input, and the command word represented by the symbol has both a bit signal and a word signal as its input, and the result of command processing, that is, the word as an output. If a signal is to be output, the symbols 11 will be connected and displayed as shown in FIG. 3(b). And in this case,
Although the bit point pb keeps moving, the word point moves from PW to Pw' in FIG. 3(a), thereby indicating the latest display position. The meaning of each symbol in FIG. Symbol 11 indicates an instruction to output a word signal loaded from memory when switch 9 is on.Similarly, in the example of FIG. 4, lO is a load instruction, and 13 is an AND operation instruction. , 14 is an absolute value operation instruction, 15
Assuming that is a comparison instruction, this program performs an AND operation between the signal loaded from memory and a predetermined signal, then calculates the absolute value, compares it with the predetermined value, and returns "〉" or f.
This indicates that when cFir=J is established, a predetermined bit output is output to operate a predetermined output device or device OCO. Note that 12 indicates the address part (operand part) of the instruction, pb.

PW is a bit point or word point similar to the above. Therefore, it can be seen that the program shown in FIG. 4 consists of only word commands. This program can be said to represent the list shown in FIG. 1 in a diagram format (sequence diagram) equivalent to the corresponding ladder diagram format.

In other words, the standard form of a word command is a symbol that describes the contents of the command in parentheses ([]), such as a symbol such as [Δ] (and), and the symbols 16 to 16 in FIG. For example, symbol 16Fi in FIG. 5 is one in which the input is a bit signal or a word signal, and the output is also a bit or word signal. It is shown that. Symbols 17 to 20 are also displayed in the same way, with lead lines attached to the left and right upper portions depending on whether the input or output thereof is a bit signal or a word signal. Also,
If the input or output of the instruction word is a bit signal, a leader line extending from the center of the symbol is attached as described above. For example, symbol 16 in FIG. 5 is an example in which both input and output include bit signals. In other words, the word instruction symbol has ([]) as its basic type, and
Depending on the command content shown in parentheses [ ], a symbol light will be displayed on the input side or output side with a leader line attached from the center or the top, but this judgment process is performed using the object-ladder diagram in Figure 2. This is done in the diagram conversion section 4. In this way, information representing the symbol of each command word and information representing the degree of connection between the symbols are stored in the storage unit 5. Conversion and display control s6 in Figure 2
By converting the information to be displayed stored in the storage unit 5 into a set of display elements whose basic size and shape are predetermined and supplying the converted display elements to the optical display device 8-, the symbol of the command word is displayed. Perform display.

FIG. 6 is a block diagram showing another embodiment of the present invention. That is, this embodiment is constructed by removing the input section 1 and the input control and conversion section 2 from the one shown in FIG.
Therefore, this configuration is used as a system for displaying programs stored in the object code storage section 3 on a monitor.

The function is the same as in FIG. Note that although the conversion and display control section 6 shown in FIG. 2 is omitted in this figure, this is because it is shown included in the display section 8, and they are basically exactly the same.

As described above, according to the present invention, when representing a bit signal or a word signal, by changing the position on the symbol, that is, by introducing a bit point and a word point, a bit operation instruction and a word operation instruction can be used. Since it is possible to display a ladder diagram (or a diagram equivalent to this) of mixed programs, visual confirmation becomes easy and the efficiency of program creation or modification work can be significantly improved. Furthermore, since it can handle both bit operation instructions and word operation instructions, it has the advantage of widening the scope of application of the target program.

It should be noted that the present invention allows not only the creation of the above-mentioned programs but also the modification thereof. In this case, this can be done by a simple operation of simply changing the mode in the same way as in the case of creation.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram for explaining an example of a program displayed in list format, Fig. 2 is a block diagram showing an embodiment of the present invention, and Fig. 3 is an explanatory diagram for explaining the ladder display format of command words. , Fig. 4 is an explanatory diagram illustrating an example of displaying a program in a diagram format equivalent to a ladder diagram, Fig. 5 is an explanatory diagram illustrating the relationship between input and output in symbols of word operation instructions, and Fig. 6 is an explanatory diagram illustrating the relationship between input and output in symbols of word operation instructions. FIG. 3 is a block diagram showing another embodiment of the invention. Description of symbols 1... Input section, 2... Input control and conversion section, 3.
...Object code storage unit, 4...Object-ladder diagram conversion unit, 5...Intermediate code storage unit, 6...
・Conversion and display control unit, 7... Optical display device, 8...
Display unit, 9...Display symbol of bit operation instruction, 10
, 11゜13~20...Display symbol agent for word operation instructions Patent attorney Akio Namiki Agent Patent attorney Kiyoshi Matsuzaki Figure 1 Figure 2 Figure 3 Figure 4 Figure 2 70 73 74 75

Claims (1)

[Claims] Various bit operation instruction words constituting a predetermined program,
an input means for selecting and inputting information corresponding to each word operation instruction word; a code conversion means for converting each instruction word input in program order through the input means into a predetermined machine code; and the machine code. a first storage means for sequentially storing instruction words converted into , and a first storage means for converting each stored instruction word into a code of a display symbol corresponding thereto, and whether the instruction word belongs to a beep or a word operation instruction; a conversion control means for outputting additional information indicating that a predetermined operation is to be performed on a predetermined portion of the light indicating symbol according to the processing content of the instruction if the result is a word operation instruction; a second storage means for storing the display symbol code or a symbol code attached with additional information; and a display means for displaying each instruction word in a ladder diagram format or an equivalent diagram format based on the stored contents. and create or modify a program consisting of only pit operation instructions, only word operation instructions, or both bit operation instructions and word operation instructions in a ladder diagram or equivalent diagram format. Create a program featuring the following. Correction device.