JP2762665B2 - Blog programming device for programmable controller - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a programmable controller programming device that creates and inputs a sequence program to be executed by a programmable controller.

[Conventional technology]

Conventionally, a programmable controller automatically controls an electronic device by executing a sequence program.
The programming device creates this sequence program as a program in the form of a figure called a ladder diagram, then checks the format of the program command, and converts it into machine language to be executed by the programmable controller.

[Problems to be solved by the invention]

However, some conventional programmable controllers have different functions from one model to another. Therefore, the format of an instruction in the same sequence is different, or a program instruction is used only in a certain model.

For this reason, it is not possible to perform a general-purpose format check for each program of a plurality of models with a single programming device, and a dedicated programming device must be connected to the programmable controller for each connection model. There was in the device.

In view of the above, an object of the present invention is to provide a programmable controller capable of contributing to generalization of a programming device by performing a format check of a sequence program for a plurality of models with a single programming device. It is to provide a programming device.

[Means for solving the problem]

In order to achieve such an object, the present invention provides a storage means for storing data for format check of a sequence program in advance for each model of a programmable controller that executes the sequence program and storing the data, and a programmable device connected to a programming device. An instruction means for instructing the model of the controller, and an error detection means for detecting an error in the created sequence program by using the format check data corresponding to the model instructed by the instruction means.

[Action]

The present invention has a common point that, even if the format of the program to be checked is different, the format check of the program is performed to determine whether or not the created program instruction satisfies the condition indicated by the prescribed format data. By paying attention, the format data of each model is stored in the storage means, and the format data is instructed and used for the format check, thereby enabling a single programming device to perform the program check of multiple models.

〔Example〕

Hereinafter, embodiments of the present invention will be described in detail and specifically with reference to the drawings.

 FIG. 1 shows a basic configuration of an embodiment of the present invention.

In FIG. 1, reference numeral 100 denotes storage means for determining and storing format check data for each model of a programmable controller that executes the sequence program.

Reference numeral 200 denotes an instruction unit for instructing the type of the programmable controller connected to the programming device.

Reference numeral 300 denotes an error detection unit that detects an error in the created sequence program using the format check data corresponding to the model designated by the designation unit.

 FIG. 2 shows a specific circuit configuration of the embodiment of the present invention.

In FIG. 2, a central processing unit (CPU) 1, a read-on memory (ROM), a system random access memory (RAM) 3, a user RAM 4, a keyboard input device 5, a display device
6, an input / output interface (I / O) 7 is commonly connected to the bus.

The CPU 1 controls the operation of the entire apparatus and performs the following processing.

1) Based on the system program stored in the ROM 2, the sequence program information input from the keyboard input device 5 is created and stored in the user RAM 4. In addition, the display device 6 displays the created sequence program.

2) The sequence program in the user RAM 4 is read in units of program instructions, and the format data table
The format is checked using the format data of No. 1.

Therefore, the ROM 2 operates as a storage unit, and the CPU 1 operates as an error detection unit.

3) In addition to the above-described processing, a well-known processing such as a processing of transferring a created program to the programmable controller is performed.

The ROM 2 stores a table 2-1 in which format data used for a format check in addition to a control procedure executed by the CPU 1 are described. Format data table 2
As shown in FIG. 3, -1 stores format data for each model code of the programmable controller.

As in the conventional case, the format data includes a correct identification code name (referred to as an identifier) of a program instruction, a correct storage location of the identifier, and an address setting range for storing information defined by the identifier (for example, information specified by an output instruction). In addition, various conditions such as the number of various parameters included in the program instruction and the range of numerical values are prepared.

Returning to FIG. 2, the system RAM 3 temporarily stores various information used for the operation of the CPU 1.

The user RAM 4 temporarily stores the sequence program being created or the currently executed sequence program transferred from the programmable controller.

The keyboard input device 5 inputs an operation instruction to the CPU 1 in addition to the program information to be created. Model information according to the present invention is also input from the keyboard input device. Therefore, the keyboard input device 5 operates as an instruction unit.

The display device 6 is used for displaying a sequence program being created or being executed. The I / O 7 is provided between the CPU 1 and the programmable controller to transfer information.

The format check processing of the sequence program in such a circuit configuration will be described with reference to the flowchart of FIG.

Note that the sequence program is created in advance and
It is assumed that it is stored in RAM4.

When an operation command for performing a format check is input from the keyboard input device 5, the CPU 1 reads out the control procedure of FIG. 4 from the ROM 2 and starts execution. According to this control procedure, the CPU 1 first receives a model code designating the model of the programmable controller from the keyboard input device 5 (step S0 in FIG. 4).

A read address range of the format data table is set corresponding to the model code. Next, when the CPU 1 reads the head instruction of the sequence program in the user RAM 4, the program instruction is decomposed into elements for another format check, that is, instructions (identifiers), parameters, written position information, and the like by a conventional method (fourth). Step S1 in the figure.

Next, from the item of the specified model code (for example, F30 in the example of FIG. 3) of the format data table 2-1, the corresponding format data corresponding to the element of the creation program instruction is read, and the condition indicated by the format data is met. Format error is determined whether the
Steps S2 → S3 in the figure).

 At this time, the CPU 1 operates as an error detection unit.

Thereafter, when the collation processing with the format data for the other elements is completed, the program instruction at the next address is read and the same error detection processing is performed (step in FIG. 4).
S3 → S6 → S1).

When a format error is detected by this error detection processing, a message indicating the content of the error is displayed on the display device 6.
(Steps S3 → S4 → S5 in FIG. 4).

By repeating such processing sequentially, the format error processing of one program is executed, and the present control procedure ends.

As described above, in the present embodiment, the format data used for detecting the format error is selected and set from the format data for each model. Sequence programs can be created,
One programming device can be connected to and used for various types of programmable controllers.

Also, even when a sequence program for a programmable controller of a different model is copied (copied) and corrected to a sequence program for a desired model, the corrected portion can be easily detected by using this format error detection procedure. Becomes

 The following examples are given in addition to the present embodiment.

1) This embodiment uses a non-volatile RO
Although the data is stored in M, a nonvolatile rewritable storage medium (floppy disk, EEPROM) or the like may be used for storing data. In this case, when a new model is sold, the format data can be expanded and stored, and the format data can be corrected in response to a version upgrade (specification change) of the model. .

〔The invention's effect〕

As described above, according to the present invention, a sequence program for various types of programmable controllers can be created by one programming device, so that the number of installed programming devices can be minimized. Becomes Further, since it becomes possible to easily modify a sequence program of another model, a new effect of reducing the user's program creation effort can be obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a basic configuration of an embodiment of the present invention, FIG. 2 is a block diagram showing a circuit configuration of the embodiment of the present invention, and FIG. 3 is an explanatory diagram showing an example of a format data table of the embodiment of the present invention. FIG. 4 is a flowchart showing a control procedure executed by the CPU according to the embodiment of the present invention. 1 ... CPU, 2 ... ROM, 2-1 ... format data table, 5 ... keyboard input device.

Claims (1)

(57) [Claims] 1. A storage means for predetermining and storing data for format check of a sequence program for each model of a programmable controller executing the sequence program, and an instruction means for indicating a model of the programmable controller connected to the programming device. An error detecting means for detecting an error in a sequence program created using the format check data corresponding to the model specified by the specifying means, and a programming device for a programmable controller.