JPS59229605A - Program loader - Google Patents

Abstract

PURPOSE:To input a program with large capacity efficiently by enabling a keyboard to be used only for program input to be connected to a program loader. CONSTITUTION:The program loader 30 converting a sequence program into a ladder diagram and displaying the ladder diagram is constituted of a keyboard 31, a central processing circuit 32, picture editing circuit 33, etc. and provides program inputs and various operation commands through the keyboard 31. In this case, the 2nd keyboard 91 to be used only for the input of a program is connected. A program with large capacity is inputted from the 2nd keyboard 91 by turning a keyboard alteration switch 90 and stored in a refresh memory 34. The stored programs are successively read out by timing pulses from a display control circuit 36, converted into pattern elements of a ladder diagram by a pattern generating circuit 35 and then displayed by a display device 37.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field of the Invention] The present invention relates to a program loader for a programmable controller, and more particularly to a program loader equipped with a keyboard exclusively for human programming.

[Technical background and problems of the invention]

A programmable controller is a relay contact logic circuit that has been used in conventional sequence control.

This is a device that achieves functions equivalent to non-contact logic circuits, analog amplifier circuits, etc. using a general-purpose electronic circuit using a stored program system similar to that used in electronic computers.

FIG. 1 is a block diagram showing an outline of this type of programmable controller. In the figure, a programmable controller 10 includes an arithmetic control section 11, a memory 12 . It consists of an interface unit 13 with a sequence control target and is connected to a program loader 14. When executing a sequence, the sequence program written in the memory 12 is guided to the arithmetic control unit 11.
Arithmetic processing is performed based on signals input from the outside through the interface unit 18, and the results are used in the interface unit 1B (two-ring key) to control the sequence control target. It is possible to make corrections, edits, etc.

During sequence control, the hardware relay contact logic circuit shown in Figure 2(b) corresponds to the one shown in Figure 2(a).
Ladder diagrams like the one shown are widely used. In addition, a ladder diagram as shown in Figure 3(b) is used in correspondence with a hardware arithmetic circuit consisting of an analog amplifier and resistors as shown in Figure 3(a). The diagram can be displayed as is using a display device capable of displaying a screen, such as a CRT (cathode ray tube) display device. Therefore, by using this ladder diagram as an input means of a programmable controller, engineers who have been familiar with relay contact logic circuits and analog calculation circuits can easily input programs when handling programmable controllers. It is possible to decipher it.

FIG. 4 is a block diagram of a conventional program loader and programmable controller. Same figure: 2 minus 20
is a programmable controller, and programmable memory 21. is a programmable controller. Arithmetic control unit 22. Input section 28. Output section 24. Data memory 25. It consists of 26 interface groups. Various sequence programs for instructing sequence control are written in the program memory 21.

The calculation control unit 22 performs calculations with the input/output elements connected to the input stage 1523 and the output Rf 24 based on the sequence program stored in the program memory 21, and turns the output elements on and off based on the calculation results. Sequence control is executed by repeating step 9 or by writing the calculation result into the data memory 25.

Furthermore, the interface and eighth capital 26 exchange data with a program loader 80, which will be described below.

That is, sequence commands or control data input from the program loader 30 are written into the program memory 21 and data memory 25 through the calculation control unit 22, and vice versa, sequence commands or control data are written from the program memory 21 through the calculation control unit 22, or Reads the control data 1 from the data memory 25 and uses the program loader 3
Send to 0.

On the other hand, 80 is a program loader that converts a sequence program into a ladder diagram and displays it, and a keyboard 31 . Central processing circuit 822 Screen editing circuit 33. Refresh memory 34. Pattern white main circuit 352 Display control circuit 361 Display device 37° Ladder diagram conversion circuit 3
8. Buffer memory 39. Ladder diagram reproduction circuit 40. It is composed of an interface circuit 41.

The operator can use the keyboard 31 to manually input programs and give various operation commands. The central processing circuit 82 is
Various operation commands given from the keyboard 81 are decoded and actual processing commands are given to each processing circuit described below. The screen editing circuit 83 loads the program input from the keyboard 31 into the refresh memory 84, and also performs editing processing such as creating or modifying a ladder diagram based on screen editing commands input manually from the keyboard 81. Row 9: The refresh memory 84 stores data to be displayed on the display device 37. The data stored in the refresh memory 84 is sequentially read out at the timing given by the display control circuit 86, and the pattern generation circuit 85 generates characters. It is converted into a graphical element of a ladder diagram, and the display device lff is displayed by the control ωV of the display control circuit 86.
Displayed on 1s 7. Ladder diagram conversion circuit 3
8 is a ladder diagram reproducing circuit 4 which converts the display information of the ladder diagram written in the refresh memory 34 into sequence commands for the programmable controller and inputs them into the buffer memory 89.
0, on the other hand, restores the sequence commands of the programmable controller to the form of a ladder diagram and stores them in the refresh memory 34.

The interface circuit 41 exchanges data with the programmable controller 20 described in 111.

That is, a sequence command or control data stored in the buffer memory 89 is read out and sent to the interface circuit 26 in the programmable controller 2o, and conversely, a sequence command or control data is received from the interface circuit 26 and sent to the interface circuit 26 in the programmable controller 2o. It has a function of writing to the memory 89.

FIG. 5 is a diagram showing an example of graphic symbol logic elements used in a ladder diagram. In a relatively small-scale programmable controller and program loader with the above configuration, a key (push button) marked with this graphic symbol is prepared on the keyboard of the program loader for each logical element. However, the operator manually executes the sequence program by appropriately pressing the graphic symbol keys. 1. FIG. 6 is a diagram showing an example of a keyboard having such a configuration.

In recent years, programmable controllers have become more sophisticated.

With the increase in functionality, the ladder diagram of conventional sequence operations and four arithmetic operations has been replaced with syntax instructions such as IF syntax and DO syntax that control program execution, trigonometric functions, exponential functions, logarithmic functions, etc. It has become possible to program special function instructions.

FIG. 7 is an example of a graphic symbol logic element used in such a highly functional and multifunctional programmable controller.

There are many graphical symbols used for program input9.
In addition, the number of keys that control the programmable controller has increased (secondly, it has become difficult to prepare all the keys marked with the graphic symbol ν on the keyboard of the program loader as mentioned above. As shown in FIG. 8, the graphical symbols used for program input are displayed at the bottom of the display screen of the display device of the program loader, and a key for selecting graphical symbols is provided on the keyboard corresponding to this, and the selection key is Figure 9 is an example of a group of graphic symbols used in such an input method.

In the above-described input method, there is no need to provide a key marked with a graphic symbol on the keyboard of the program loader, resulting in a simple hardware configuration. However, in order to input a program, it is necessary to first display a group of graphical symbols required for input, and then select the desired graphical symbol to input from that group, which requires inputting a large amount of programs. In some cases, there is a problem of poor efficiency.

[Purpose of the invention]

The present invention was made in order to solve the problems mentioned above, and enables a keyboard dedicated to inputting programs to be connected to a program loader in a highly functional and multifunctional programmable controller, thereby enabling efficient processing of a large number of programs. The purpose is to provide a program loader that can perform input.

[Summary of the invention]

The present invention comprises an input section including a keyboard for inputting programs and various operation commands, a display section for displaying programs and data, a refresh memory for storing data to be displayed in a deletion bar section, and a refresh memory for storing data to be displayed in a deletion bar section. A ladder diagram converter converts the display information of the ladder diagram written in the memory into sequence commands for the programmable controller, and converts the sequence commands obtained by the ladder diagram converter back into the form of a ladder diagram. an interface section that exchanges information between the programmable controller, a ladder diagram reproducing section that decodes various operation commands given from the -1 input section, and a ladder diagram converting section that decodes the various operation commands given from the -1 input section. In a program loader comprising a central processing section that gives processing instructions to a playback section, an interface section, etc., a second manual section consisting of a keyboard dedicated to program input, and an input for switching between the input section and the second input section; A switching section is provided, 1Ii1
This is a program loader that enables efficient input of a large amount of programs even in single-function and multi-function programmable controllers.

[Embodiments of the invention]

Hereinafter, the program loader of the present invention will be explained based on an embodiment shown in FIG. 10. In the same figure, the same parts as those of the conventional program loader shown in FIG. Here, only the different parts will be described. In the figure, 90 is a keyboard changeover switch, and 91 is a second keyboard that is used exclusively for inputting programs.

FIG. 11 shows an example of the configuration of the keyboard 91. 9
11 is the dedicated character key - 1912 is the controlled object input symbol key,
918 is a graphic symbol key, and 914 is a process start command key.

Since the keyboard 91 is used exclusively for manual programming, it can eliminate unnecessary keys for controlling the controller, inputting English characters, kana characters, etc., and is useful for programming. All shapes and symbols keys can be prepared.

Next, a description will be given of the operation of the program loader having the second keyboard which is used exclusively for inputting the program according to the present invention and configured as described above. When performing a large amount of manual programming using the program loader 80, the operator selects the second keyboard by switching the keyboard changeover switch 90. The central processing circuit 82 is now able to accept program input from the keyboard 91, and the operator inputs the SIB tetragram by appropriately pressing keys 918 marked with graphic symbols. Programs entered manually from the keyboard 91 are stored in the refresh memory 34 and sequentially read out at timings given from the display control circuit 36, converted into graphic elements of a ladder diagram by the pattern generation circuit 85, and then controlled by the display control circuit 36 (secondary). is displayed on the display device 87.

If the keyboard changeover switch 90 is configured as shown in FIG. 12, the mode signal PROG is output from the central processing circuit 32 only when the switch 901 is selected as the second keyboard 91 and the program creation mode is selected. Input from the keyboard can be accepted, and mutual interference between the first keyboard 31 and the second keyboard 91 can be prevented by selecting the first keyboard 31 in other modes. According to the program loader of the present invention, the present invention can be implemented with various modifications without changing the gist. It is possible to input a large amount of programs efficiently from the keyboard. Even with a programmable controller with a high number of functions and functions, it is possible to input a large amount of programs efficiently.

[Brief explanation of drawings]

The first section is a diagram showing an overview of the programmable controller,
Figure 2 shows an example of a hardware relay contact logic circuit and a corresponding ladder diagram format program, and Figure 8 shows a hardware arithmetic circuit and a corresponding ladder diagram format program example. 4 is a diagram showing an example of the configuration of a programmable controller and a program loader, FIG. 5 is a diagram showing an example of graphic symbol logic elements used in a ladder diagram, and FIG.
The figure shows an example of the keyboard of a program loader with a small-scale configuration, FIG. 7 shows an example of graphic symbol logic elements used in a highly functional and multifunctional programmable controller, and FIG. 8 shows an example of a highly functional and multifunctional programmable controller. A diagram showing an example of the input of a multi-functional programmable controller.
FIG. 10 is a diagram showing an example of a group of graphic symbols used in the input method shown in FIG. The figure shown in FIG. 12 is a diagram showing an example of the configuration of a keyboard changeover switch. 20°...Programmable controller 21...Program memory 22...Arithmetic control section 28...Input section 24...Output section 25...Data memory 30...Program loader 81...Keyboard 32.・Central processing circuit 88・
...Picture th1 editing circuit 34...Refresh memory 85...Pattern generation circuit 86...Display control circuit 87...Display device 38...Ladder diagram conversion circuit 39...Buffer memory 40... Ladder diagram reproduction circuit 41...Interface circuits 61-62...Solid symbol logic element 811...Number input key 312...Control, control target input symbol key 313
... Controller control key 814 ... Process start command key 815 ... Sequence figure symbol key 816 ...
Arithmetic i operation figure symbol keys 71-88... figure symbol logical element 817... figure symbol selection keys 871-875... figure symbol group 90...
Keyboard selection switch 91...Second keyboard 901...Selection switch 902.906...OR
Circuits 908 to 905...AND circuit 911...Number entry key-912...Controlled object input symbol key 918...Graphic symbol key 914...Processing start command key (7a17) Agent Patent attorney Noriyuki Kensuke (11
or 1 person) Figure 1 0 Figure 2 tb) Figure 3 (α) 3 (b) Cr2 Figure 9

Claims (2)

[Claims] (1) An input section consisting of a keyboard for inputting programs and various operation commands, a display section for displaying programs and data, a refresh memory for storing data to be displayed on the display section, and a refresh memory for storing data to be displayed on the display section. A ladder diagram conversion unit that converts the display information of the ladder diagram that has been written into sequence instructions for the programmable controller, and a ladder diagram that converts the sequence instructions obtained by the F8+I ladder diagram conversion unit back into the form of a ladder diagram. an interface unit that exchanges information between the playback unit and the programmable controller; a display control unit that decodes various operation commands given from the input unit; a ladder diagram conversion unit; a ladder diagram playback unit;
A program loader comprising a central processing section that gives processing commands to an interface section, etc., comprising a second input section consisting of a keyboard dedicated to program input, and an input switching section for switching between the input section and the second input section. A program loader that is patented. (2) The input switching unit includes a changeover switch that selects the input unit and the second input unit, and i! 11. The invention comprises an input section switching logic circuit which switches between the input section and the second input section according to the input section selection signal of the changeover switch section 11 and the condition signal from the central processing section. The program loader described in Section 1.