JPH0670001U - Peripheral device of programmable controller - Google Patents

Abstract

(57) [Summary] [Purpose] To facilitate the creation, modification, debugging, and operation monitoring of ladder circuits. [Composition] A display means for displaying a ladder circuit on a screen in a peripheral device for creating and displaying a ladder circuit of a PC.
(100), in the displayed ladder circuit, the identification name designating means (102, 104) for designating the identification name of the input / output element, and the ladder circuit are searched to find the input / output element having the designated identification name. A search means (108) for searching, a location information display means (110) for displaying position specifying data for specifying the existing position of the searched input / output element in the ladder circuit, and a circuit display for the displayed position specifying data. Display portion designating means (112, 114) for designating the data desired to be displayed, and the circuit portion specified by the position designating data by searching the ladder circuit based on the position designating data designated by the display portion designating means. Search display means (116, 118) for displaying is provided.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a peripheral device for programming a sequence control program of a programmable controller (hereinafter, simply referred to as “PC”) with a circuit diagram. In particular, it relates to a device that facilitates the creation, modification, debugging, and operation monitoring of ladder circuits.

[0002]

[Prior art]

 Conventionally, an operator creates a ladder circuit by using a peripheral device. In this case, in order to facilitate the creation, modification, debugging, etc. of the ladder circuit, the operator must confirm which part of the ladder circuit has the same identification name (signal name, input / output element address). It is necessary to know how (normally open contact, normally closed contact, relay coil) and how much is used.

[0003]

[Problems to be solved by the device]

 However, conventionally, the relationship between the input / output element identification name and the use position is merely given as a table, and the use position is displayed or one use position is indicated in relation to the display of the ladder circuit. The display function of the ladder circuit and the display function of the use position were not organically combined such that the circuit portion including the use position was displayed when the selection was made.

Therefore, the display of the use position of a specific identification name and the display of the circuit corresponding to a certain use position are mostly done manually by the operator, and it takes a lot of time to create and modify the ladder circuit. Needed

The present invention has been made to solve the above problems, and its purpose is to facilitate the creation, modification, debugging, operation monitoring, and the like of a ladder circuit.

[0006]

The present invention relates to a peripheral device for creating and displaying a ladder circuit corresponding to a sequential control program for a programmable controller, and a display unit for displaying the ladder circuit on a screen. In the ladder circuit displayed by the display means, an identification name designating means for designating an identification name of the input / output element and a search for searching the ladder circuit for an input / output element having the identification name designated by the designating means Means, a usage destination information displaying means for displaying the location specifying data for specifying the existing position of the input / output element searched by the searching means in the ladder circuit, and the position specifying data displayed by the usage destination information displaying means, Based on the display part specifying means for specifying the data to be displayed and the position specifying data specified by the display part specifying means Searching for ladder circuit, and having a search display means to display the circuit part specified by the position specifying data.

[0007]

[Action and effect of the device]

 In the ladder circuit displayed by the display means, the identification name of the input / output element whose usage is desired to be displayed is specified by the identification name specifying means. The ladder circuit is searched based on the specified identification name, and for all the input / output elements to which the identification name is attached, the position specifying data for specifying the existence position of the input / output elements is used as the usage information display means. Is displayed by. Next, in the displayed position specifying data, the data to be displayed on the circuit is specified by the display part specifying means. After that, the ladder circuit is searched based on the designated position specifying data, and the corresponding circuit portion is displayed.

As described above, the operator looks only at the ladder circuit and specifies the identification name of the input / output element to be searched for, and the position identification indicating the existence position of the input / output element having the identification name on the ladder circuit. It is possible to display the data and easily recognize the circuit part where the input / output element is used. Therefore, it is possible to easily create, modify, debug, and monitor the operation of the ladder circuit.

[0009]

【Example】

 Hereinafter, the present invention will be described based on specific examples. FIG. 1 is a block diagram showing a specific configuration of the peripheral device of this embodiment. Ladder circuit diagram creation, modification, display, designation of identification name on ladder circuit, search of input / output elements, designation of position specifying data, display of circuit part, CPU10 for storing, program for its processing stored The ROM 11, the CRT 12 for displaying the ladder circuit and the operating state, the symbol data of the input / output elements for creating the ladder circuit, the keyboard 13 for inputting various commands, and the CPU 10 and the CRT 12 and the keyboard 13 for interposing An input / output interface 14, a ladder circuit diagram, a RAM 15 for storing the source program of the ladder circuit and an object program, a floppy disk device for storing the source program stored in the RAM 15 on a floppy disk, and an interface 17 for connecting to the PC 01. It consists of and. Further, the RAM 15 includes a ladder circuit diagram area 151 in which a ladder circuit diagram is stored as symbols, a source program area 152 in which a source program corresponding to the ladder circuit is stored, and an object program area 153 in which an object program in a PC execution format is stored. And are formed.

In each PC, a sequence control program is created by a ladder circuit diagram as shown in FIG. In the ladder circuit diagram of FIG. 2, the input element is a contact such as a relay or limit switch, and the output element is a relay coil or the like. Input elements and output elements are collectively called input / output elements.

As shown in FIG. 2, input / output elements are provided with input / output element identification names (signal names) D1, D2, D3, and the like. One row of the ladder circuit shown in FIG. 2 has a display region of five digits, that is, five kinds of circuit symbols. As shown in FIG. 3, the ladder circuit is described for each display area using a code indicating a symbol of an input / output element, a signal name, and a code of a connecting line. For example, normally open contact is "10", normally closed contact is "11", relay coil is "12", horizontal connection line is "50", vertical connection line is "51", line separator is "@" Has been transformed. Such a symbolized program as shown in FIG. 3 is stored in the ladder circuit diagram area 151 of the peripheral device 1.

Next, an operation procedure of this peripheral device will be described with reference to FIG. In step 100, the circuit is displayed on the CRT 12 from the head of the designated ladder circuit based on the code data shown in FIG. 3 stored in the ladder circuit diagram area 151. Next, in step 102, the cursor is arbitrarily moved in the displayed ladder circuit. Then, in step 104, when the operator wants to specify the input / output element displayed in the cursor, the operator presses the specified key of the keyboard 13. In step 104, it is determined whether or not the designated key is turned on. When the designated key is turned on, the signal name of the input / output element indicated by the cursor is designated. For example, if the designation key is pressed while the normally closed contact of the signal name D1 is displayed on the cursor, this signal name D1 is designated.

Next, in step 108, all of the designated signal names D1 are searched in the code data of the ladder circuit diagram shown in FIG. At this time, the page number and line number in which the signal name D1 exists are counted. Then, in step 110, as shown in FIG. 5, a window is formed on the ladder circuit being displayed, and a page number and a line number for specifying the existence position of the input / output element having the signal name D1 are displayed in the window. Positioning data consisting of is displayed. At this time, the normally-closed contact is underlined, and the normally-open contact is not underlined. The device code is also displayed, and in the case of a relay coil, this is indicated by framing the device code. Next, in step 112, the cursor display is sequentially moved on the position specifying data. Next, in step 114, it is determined whether or not the enter key is pressed. If the enter key is pressed, the position specifying data (page number and line number) of the column where the cursor is displayed is read. To be Then, in step 116, the position of the code data of the ladder circuit shown in FIG. 3 is searched from the specified page number and line number. Then, in step 118, the circuit portion corresponding to the designated position specifying data is displayed as shown in FIG. In this state, in step 122, the circuit diagram can be scrolled and the circuit can be modified. Further, in step 120, it is determined whether or not the return key is pressed, and if it is pressed, the process returns to the position specifying data display process of step 110. That is, the screen display is as shown in FIG. In this state, the partial circuit can be displayed by designating other position specifying data.

If it is determined in step 114 that the enter key has not been pressed, it is determined in step 124 whether the return key has been pressed, and if the return key has been pressed, Returning to step 100, only the first ladder circuit diagram is displayed as shown in FIG. In this state, other signal names can be searched.

In this way, the signal name can be freely searched on the ladder circuit, and the desired partial circuit diagram can be easily displayed. Therefore, the ladder circuit can be created, modified, debugged, and operated. A monitor or the like can be easily performed.

[Brief description of drawings]

FIG. 1 is a block diagram showing the configuration of a peripheral device according to a specific embodiment of the invention.

FIG. 2 is a circuit diagram showing a ladder circuit corresponding to a PC sequence control program.

FIG. 3 is an explanatory view showing code data corresponding to the ladder circuit.

FIG. 4 is a flowchart showing a procedure for searching for input / output elements and displaying a partial circuit in a ladder circuit by the peripheral device of the present embodiment.

FIG. 5 is an explanatory diagram of a screen displaying position identification data.

FIG. 6 is an explanatory diagram of a screen displaying a searched partial circuit diagram.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Programming device 10 ... CPU (display means, identification name designation means, search means,
Usage information display means, display portion designation means, search display means 13 ... Keyboard (identification name designation means, display portion designation means) 12 ... CRT (display means, usage information display means, search display means) 15 ... RAM step 100 ... Display means Steps 102-104 ... Identification name designation means Step 108 ... Search means Step 110 ... Used information display means Steps 112-114 ... Display portion designation means Steps 116-118 ... Search display means-112 ... designation means Step 300 ... 312 ... Display means

Claims (1)

[Scope of utility model registration request] 1. A peripheral device for creating and displaying a ladder circuit corresponding to a sequence control program for a programmable controller, comprising: display means for displaying the ladder circuit on a screen; and a ladder displayed by the display means. An identification name designating means for designating an identification name of an input / output element, a searching means for searching the ladder circuit for an input / output element having an identification name designated by the designating means, and the searching means; To display the position specifying data for specifying the existing position of the input / output element searched by the position specifying data in the ladder circuit, and to display the circuit in the position specifying data displayed by the use position information displaying unit. Display portion designating means for designating data, and based on the position specifying data designated by the display portion designating means And a search and display means for searching the ladder circuit and displaying a circuit portion specified by the position specifying data.