JPH06161516A - Checking method for sequence program - Google Patents

Abstract

(57) [Summary] [Purpose] Allows the programming device to check the sequence programs executed by other models. [Structure] The reference data used for the program check is stored in a programming device in association with the model of the programmable controller, and the reference data is selected by designating the model during the program check.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a sequence program check method for checking a sequence program executed by a programmable controller in a programming device.

[0002]

2. Description of the Related Art Conventionally, a programming device has a function of checking a created program when creating a sequence program to be executed by a programmable controller. This check includes a grammar check to check if the program command is written in the correct format, a check to see if the same I / O command in the sequence command is used twice, and a read with the I / O command. It is known to check the range of input / output data to be written.

[0003]

In programmable controllers, the number of input / output data that can be handled and the sequence instructions that can be executed differ depending on the model. Therefore, the check contents to be executed by the programming device have been determined for each model of the programmable controller.

Therefore, in the conventional programming device, when a sequence program created by a programming device of another model is checked, a check item such as a data range check that cannot be executed occurs.

From such a state, there is an increasing demand from the user that the programming device can check the sequence program created by another model.

Therefore, in view of the above points, an object of the present invention is to provide a method for checking a sequence program, which can execute various program checks in a general-purpose manner.

[0007]

In order to achieve such an object, the invention of claim 1 provides the range information indicating the usable range of the data identification name described in the sequence program to the model of the programmable controller. Stored in the programming device in advance in association with the above, when instructing the program check of the sequence program by the programming device, instructing the programming device the model of the programmable controller that uses the sequence program to be checked, the programming device The range of the data identification name is checked using the range information corresponding to the instructed model.

According to a second aspect of the present invention, the type of the program command described in the sequence program and the information indicating the model of the programmable controller capable of executing the program command are stored in advance in the programming device in association with each other. When the sequence program is checked by the programming device, the model of the programmable controller that uses the sequence program to be checked is instructed to the programming device, and the programming device outputs the information corresponding to the instructed model. It is characterized in that an unexecutable program instruction in the check target sequence program is detected by using.

[0009]

In the present invention, paying attention to the fact that the program check items do not change even if the model of the programmable controller is different, the reference data used for checking the data name range length and usable program names are related to the model. It is stored in the programming device. At the time of program check, the reference data used for the program check is selected by specifying the model corresponding to the sequence program to be checked.

[0010]

Embodiments of the present invention will now be described in detail with reference to the drawings.

Prior to the description of the present invention, a programming device to which the present invention is applied will be described with reference to FIG. FIG. 3 shows the main circuit configuration of the programming device. In FIG. 3, a central processing unit (CPU) 10 selectively executes a program stored in a system program memory 11 to control the entire system, create / edit a sequence program, and check a sequence program related to the present invention. Perform processing.

In the system program memory 11, a data range check table 11A and an instruction check table 11B used for the sequence program check process are stored in addition to the system program for executing the above process.

The user program memory 12 stores the created user program (sequence program).

The work memory 13 temporarily stores calculation input / output data for the CPU 10. The display 14 is used to display the abnormality content of the sequence program. The keyboard 15 is used to input various information such as instructions to the CPU 10.

FIG. 1 shows an example of the contents of the data area range check table 11A used for checking the sequence program.

An identification name is given to each type of data handled by the programmable controller, and the use range of this identification name is limited. Further, this identification name corresponds to the storage address of the data.

The data area range check table 11A is a table in which range information indicating the usable range of the identification name, that is, the upper limit value and the lower limit value are summarized and described for each model of the programmable controller.

The instruction check table 11B is a table showing, for each program instruction, the model of the programmable controller capable of executing the program instruction. As shown in FIG. 2, this table forms a two-dimensional space by the model and the type of program instruction, and the availability of use is represented by a bit value of 0/1.

The CPU of FIG. 3 is constructed using such a table.
The data range check and the program instruction availability check executed by 10 will be described with reference to FIG. Figure 4
3 is a flowchart showing the above-mentioned check processing procedure, which is described in a program language executable by the CPU 10 and stored in advance in the system program 11.

The keyboard 1 is used to execute the program check.
When an instruction is input from 5, the CPU 10 reads out and executes the control procedure of FIG. First, the CPU 10 is the keyboard 1
Wait for model information input from S4 (S10 → S20 in FIG. 4)
Loop processing).

When model information indicating, for example, model A of a programmable controller using a sequence program is input from the keyboard 15, the CPU 10
Information group regarding model A in the data area range check table 11A and the instruction check table 11B (see FIG. 1).
Reference) is read from the system program memory 11 and stored in the work memory 13 (S30 in FIG. 4). Less than,
The information group on the work memory 13 is called a data area file and an instruction check file.

The CPU 10 is a user program memory 1
Program instructions are sequentially read from the beginning of the sequence program stored in No. 2 (S40 in FIG. 4), and S50 to S50.
Program check processing is performed between 80.

First, the CPU 10 determines whether or not the read sequence program command can be used in the model A by referring to the command check file (S5 in FIG. 4).
0 → S60). More specifically, the instruction check file is searched for an instruction that matches the read sequence program instruction, and then the bit value of the matching instruction is checked. Here, if there is no matching instruction in the instruction check file, or if there is a matching instruction but the bit value is 0, it is determined that the read instruction is unusable and An error display to that effect is displayed (S60 → S65 in FIG. 4).

When it is determined that the read sequence program command is usable, it is next checked whether or not the range of the data identification name used in the sequence program command is within the allowable range ( S70 of FIG. 4 →
S80).

More specifically, the CPU 10 reads the upper limit value and the lower limit value of the same kind as the data identification name used in the sequence program instruction from the data area file, and the data identification name has the upper limit. Check that the data range is normal by being between the value and the lower limit.

When an abnormality in the data range is detected, an error display to that effect is displayed on the display 14 (FIG. 4).
S85). Below, until the end of the sequence program,
The above-described check process is sequentially and repeatedly executed for sequence program instructions (S50 → S90 in FIG. 4).
Loop processing).

As described above, in the present embodiment, the program instructions executable for other models and the information indicating the allowable range of the data name used in the program instructions are commonly stored in the programming device corresponding to each model. Therefore, the programming device can be used universally regardless of the model. Further, in the present embodiment, only the program instruction which is determined to be usable (executable) in the programmable controller of the designated model is subject to the data name range check, so that unnecessary program check processing is not performed. Further, since the information related to the designated model is extracted from the table information stored in the system program memory 11 into the work memory 13 and used for the program check, the information other than the designated model is stored in the CPU.
It is not a target of the search of 10 and the check process is short.

In addition to this embodiment, the following example can be realized.

1) In this embodiment, the information used for checking is collected in a table form for each check item, but it may be collected in one database using the model as a key.

[0030]

As described above, in the present embodiment, since it is possible to check the program for the sequence program executed by a plurality of types of programmable controllers, one programming device is commonly used for a plurality of types of programmable controllers. The effect of being able to be obtained is obtained.

[Brief description of drawings]

FIG. 1 is an explanatory diagram showing the contents of a data area range check table.

FIG. 2 is an explanatory diagram showing the contents of an instruction check table.

FIG. 3 is a block diagram showing a main circuit configuration of a programming device.

FIG. 4 is a flowchart showing a processing procedure executed by the CPU 10 of FIG.

[Explanation of symbols]

 10 CPU 11 System Program Memory 12 User Program Memory 12 Work Memory 14 Display 15 Keyboard

Claims (2)

[Claims] 1. A range information indicating a usable range of a data identification name described in a sequence program is stored in advance in a programming device in association with a model of a programmable controller, and the sequence program of the programming device is stored. At the time of the program check, the programming device is instructed to the model of the programmable controller that uses the sequence program to be checked, and the programming device uses the range information corresponding to the instructed model to check the range of the data identifier. A method of checking a sequence program, characterized by performing 2. A programming device, which stores the type of a program command described in a sequence program and information indicating a model of a programmable controller capable of executing the program command in association with each other in advance in the programming device, At the time of checking the sequence program by the device, the model of the programmable controller that uses the sequence program to be checked is instructed to the programming device, and the programming device uses the information corresponding to the instructed model to perform the check target. A method for checking a sequence program, characterized by detecting an unexecutable program instruction in the sequence program.