JPH04330532A - Programmable controller - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a programmable controller that automatically controls electronic equipment, and more particularly to a programmable controller that automatically performs failure diagnosis processing for equipment.

0002

2. Description of the Related Art Conventional programmable controllers automatically control electronic equipment by executing sequence programs created by users. Using this calculation function, it has become possible to execute a fault diagnosis program and perform fault diagnosis such as determining the presence or absence of a fault in the component circuits within the programmable controller device and identifying the details of the fault.

[0003]Fault diagnosis includes checking for omissions of information stored in the user program memory, sum checking,
Examples include battery voltage check processing and input/output device failure/dropout check processing.

In order to automatically perform fault diagnosis, the programmable controller executes the fault diagnosis program after completing the execution of the sequence program.

However, as programmable controllers become more multifunctional and the contents of connected peripherals change,
A problem has arisen in that the fault diagnosis program must also be created in accordance with the specifications of the programmable controller determined by each user.

[0006] In order to eliminate such problems, the applicant of the present application divided the fault diagnosis program for each type of fault.
We are proposing to execute only the failure diagnosis process that is input by the user's instructions.

[0007] In this proposal, the necessity of executing a fault diagnosis is stored in the form of an information table, and each time an automatic diagnosis is executed, the information table is referenced to determine which fault diagnosis process is "required" to be executed. .

[0008]

However, when a sequence program and a diagnostic program are executed at a constant cycle, there is a limit to the cycle, and it is desired that the failure diagnosis process be completed in as short a time as possible. In the above proposal, there is still room for improvement in reducing the processing time of the failure diagnosis program.

SUMMARY OF THE INVENTION In view of these points, an object of the present invention is to provide a programmable controller that can select a desired diagnostic process and shorten the processing time.

0010

[Means for Solving the Problems] In order to achieve such an object, a first aspect of the present invention provides failure diagnosis for a plurality of component devices in an apparatus by processing a plurality of diagnostic processing programs. In a programmable controller that performs a programmable controller, a designating means for presetting a plurality of combinations of one or more diagnostic processing programs among the plurality of diagnostic processing programs and designating one or more diagnostic processing to be executed; The present invention is characterized in that it comprises an identifying means for identifying a combination of the diagnostic programs corresponding to a diagnostic process, and an instructing means for sequentially instructing a diagnostic processing program to be executed according to the identified combination.

[0011] A second aspect of the present invention is a programmable controller that performs failure diagnosis for a plurality of component devices in a device by processing a plurality of diagnostic processing programs, and designates two or more diagnostic processing to be executed. and two or more diagnostic programs corresponding to the designated diagnostic processing, prior to execution of the failure diagnosis.
It is characterized by comprising an integration means for integrating into one program.

0012

[Operation] In the first embodiment of the present invention, various combinations of executable diagnostic programs are determined, and the combination corresponding to the diagnostic processing to be executed specified by the user using the specifying means is identified. As a result of this identification, the instruction means instructs the diagnostic processing program to be executed according to the obtained combination, so there is no need to determine whether or not to execute each diagnostic process, and the execution time of the diagnostic process is shortened.

[0013] In the second embodiment of the present invention, the diagnostic programs for the diagnostic processing specified by the user using the specifying means are integrated into one program, so that when the diagnostic program is executed, there is no need to perform a process to determine whether execution is necessary. Become.

[0014]

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

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

The programmable controller of the first embodiment is a programmable controller that performs failure diagnosis for a plurality of component devices in an apparatus by processing a plurality of diagnostic processing programs.

This programmable controller has a plurality of combinations of one or more diagnostic processing programs among the plurality of diagnostic processing programs set in advance, and a specifying means 11 for specifying one or more diagnostic processing to be executed.
00, and identification means 1200 for identifying a combination of the diagnostic program corresponding to the specified diagnostic processing;
The apparatus further includes instruction means 1300 for sequentially instructing diagnostic processing programs to be executed according to the identified combinations.

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

FIG. 2 shows the circuit configuration of the main part of the control system of the programmable controller.

In FIG. 2, a CPU 10 operates and executes various programs stored in a system program memory.

The system program 20 stores a system program for controlling the entire device and first to third diagnostic programs for diagnosing failures of each circuit in the device.

The system program includes the initial processing and base processing shown in FIG. 3, and the system control procedure shown in FIGS. 4 and 5 for executing the diagnostic program.

The work memory 30 temporarily stores data used in calculations by the CPU 10.

The user program memory 40 stores sequence programs created by the user.

Next, the operating procedure of the programmable controller will be explained with reference to the flowchart shown in FIG.

When the power is turned on, the CPU 10 executes initial processing according to the system program in the system program memory 20 (step S100 in FIG. 3).

In the initial processing, a sequence program is received from a programming device (not shown), a process to be written into the user program memory 40, and specification information indicating the type of diagnostic process to be executed is received from the programming device, and the process is written into the work memory 30. Includes processing to write to. The programming device corresponds to the specifying means of the present invention.

In this embodiment, a combination of diagnostic processes is determined in advance for each type and number of diagnostic processes to be executed, and the combinations are represented by numbers. In this embodiment, the number "1" indicates that no diagnostic processing is performed,
The number "2" indicates execution of only the first diagnostic process. Number “3”
” indicates execution of only the second diagnostic process.

The number "4" indicates execution of only the third diagnostic process. The number "5" indicates execution of the first diagnostic process and the second diagnostic process.

The number "6" indicates execution of the second diagnostic process and the third diagnostic process. The number "7" indicates execution of the first diagnostic process and the third diagnostic process.

The number "8" indicates that all of the first to third diagnostic processes are executed.

After the initial processing, the CPU 10 reads the sequence program from the user program memory 40, performs sequence arithmetic processing as in the conventional case, and determines the information signal to be transmitted to the device to be controlled (step S200 in FIG. 3). ). After the execution of the sequence program is completed, the CPU 10 performs base processing for system management, such as refreshing a memory (not shown) for storing input/output data exchanged with the controlled device, and processing for refreshing the memory (not shown) for storing input/output data exchanged with the controlled device. Communication processing and the like and diagnostic processing related to the present invention are executed (step S300 in FIG. 3).

The processing procedure of this diagnostic processing will be described later.

[0034] Hereinafter, the CPU 10 executes the above-mentioned step S20.
0 sequence program execution process, step S30
0 base processing is repeatedly executed until the power is turned off.

FIG. 4 shows a system control procedure for executing the above diagnostic processing.

This system control procedure includes an instruction (for example, a subroutine execution instruction) to sequentially start these diagnostic program groups in correspondence with the above-mentioned number, that is, a number indicating the type of combination of diagnostic processing groups to be executed. is written in advance. Note that the CPU 10 when executing this startup command operates as an instruction means of the present invention.

When the CPU 10 starts this system control procedure, first, in the initial process (step S100 in FIG. 3), the CPU 10 reads out the instruction information stored in the work memory 30, and instructs the diagnosis content requested by the user. It is identified by the number indicated by the information (steps S301→S302 in FIG. 4). The CPU 10 at this time operates as the identification means of the present invention.

For example, if the instruction information is number "5" (V), the procedure advances to step S351.

As a result, as shown in FIG.
The diagnostic process is started by a start command written in the program. More specifically, system program memory 2
The first diagnostic program 0 is sequentially read out to the end part based on the system processing procedure shown in FIG. 5, and is processed by the CPU 10. After this, the processing procedure of the CPU 10 is S in FIG.
Returning to 352, the second diagnostic process is started. After the second diagnostic process ends, the control procedure of the CPU 10 returns to the base process 300 in FIG. 3.

As explained above, in this embodiment, when the user specifies the combination of diagnostic processing that he/she wishes to execute by number, the CPU 10 in the programmable controller executes the processing procedure to sequentially start the diagnostic processing program group indicated by the number. Select and execute.

[0041] Therefore, the process of identifying the content of the diagnostic process instructed by the user only needs to be performed once, including the number identification process. In the method of identifying the diagnostic process to be executed using an information table, it is determined whether or not to execute the first diagnostic program by referring to the information table, and if execution is necessary, the first diagnostic program is executed. Thereafter, whether or not to execute the second diagnostic program is determined based on the information table. Therefore, if there are three types of diagnostic processing, the content identification processing of the diagnostic processing, that is, the processing of referring to the information table, must be performed three times.

On the other hand, in the first embodiment, regardless of the number of types of diagnostic processing, the content of the type of diagnostic processing only needs to be performed once, so that the arithmetic processing time of the CPU 10 is further shortened.

Next, a second embodiment will be described which realizes faster diagnostic processing when the user specifies whether or not to execute each diagnostic processing.

FIG. 6 shows the basic configuration for realizing the second embodiment.

The programmable controller of the second embodiment is also a programmable controller that performs failure diagnosis for a plurality of component devices in the apparatus by processing a plurality of diagnostic processing programs.

This programmable controller has a designating means 2100 for designating two or more diagnostic processes to be executed, and two or more diagnostic programs corresponding to the designated diagnostic processes, into one system prior to executing the failure diagnosis. and an integration means for integration into the program.

A specific example of the circuit configuration of the second embodiment is shown in FIG. In the explanation of this figure, points different from the first embodiment will be explained.

In FIG. 7, work memory 70 is divided into a program area 71 and a work area 72. The program area 71 is an area for storing an integrated diagnostic program to be executed. The work area 72 is used for temporarily storing calculation data of the CPU 50. Regarding the diagnostic processing instructed to be executed by the user via the programming device (specifying means of the present invention), bit information indicating whether execution is necessary for each type of diagnostic processing is stored in the work area 72 in the form of an information table. .

As in the first embodiment, the system program memory 60 stores a system program and first to third diagnostic programs for executing the processing procedure shown in FIG. This differs from the first embodiment in that it is specified to be executed.

1) Prior to system operation, such as when power is turned on, the type of diagnostic processing to be executed is received from the programming device, and the diagnostic program for the instructed diagnostic processing is copied into the program area 71 of the work memory 70 by the CPU 50 ( make a copy. CP for executing this process
The processing procedure of U10 is shown in FIG.

2) During system operation, the CPU 50 reads out the diagnostic program from the program area 71 and executes it. The processing procedure for executing this process is shown in Figure 5.
A control procedure can be used.

The circuit operation of the second embodiment shown in FIG. 7 will be explained.

The system processing procedure shown in FIG. 3 is started in the CPU 50 in response to an instruction to turn on the power or start up the system operation. The CPU 50 first moves to the initial processing procedure shown in FIG. After the CPU 50 executes an initial process similar to the conventional one, the CPU 50 receives information on the type of diagnostic process to be executed from the programming device, and stores it in the work area 72 of the work memory 70 (step S101 in FIG. 8). As a result, as described above, type information is stored in the work area 72 as bit information indicating whether execution is necessary for each diagnostic process.

Next, the CPU 50 determines whether execution of the first diagnostic process is necessary or not based on the bit information. If the determination result is that execution is “necessary”, the first diagnostic program is read from the system program memory 60 and is stored in the work memory 70.
The first diagnostic program is copied by writing it in the program area 71 of the first diagnostic program. (Step S102→S in FIG. 8
103).

Hereinafter, whether or not execution of the second diagnostic process and the third diagnostic process is necessary is determined based on the type information in the work area 72, and if execution is "necessary", the diagnostic program is replaced with the previously stored diagnostic program. Continue program area 71
(step S104 in FIG. 8)
S106).

When the process of determining whether execution is necessary and the copying process for the final diagnostic program are completed, an end code is added to the final part of the last diagnostic program in the program area, and the process of integrating multiple diagnostic programs is completed. (Step S108 in FIG. 8).

The CPU 50 at this time operates as an integrating means of the present invention.

After the CPU 50 executes other initial processing, the CPU 50 returns to the processing procedure of step S200 in FIG. 3, and repeatedly executes the user program (sequence program) execution processing and the base processing of step S300.

In executing the diagnostic processing in this base processing, based on the control procedure shown in FIG. and executes the diagnostic processing instructed by the program command (steps S1→S2 in FIG. 5).
-loop processing of S5).

When the end instruction code added to the last part of the diagnostic program at the end is read out (step S in FIG.
3), the CPU 50 ends the control procedure of FIG. 5 and returns to the processing procedure of step S300 of FIG. 3.

In this embodiment, the diagnostic programs to be executed are integrated into one prior to the diagnostic processing, so there is no need to determine whether or not to execute the diagnostic processing during the actual execution of the diagnostic processing, and a loop is eliminated. Diagnostic processing within the process is further shortened.

In addition to the first and second embodiments, the following examples can be cited.

1) In the first embodiment, the diagnostic processing group selected by the user is represented by number information, but the information is not limited to numbers, but character information such as "A", "B", etc. may also be used.

[0064]

As described above, according to the present invention, the diagnostic processing program to be executed and its execution order are set before the diagnostic processing program is executed.
The execution processing time of the diagnostic processing program is shortened.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the basic configuration of a first embodiment of the present invention.

FIG. 2 is a block diagram showing the main configuration of the first embodiment of the present invention.

FIG. 3 is a flowchart showing a system processing procedure according to the first embodiment of the present invention.

FIG. 4 is a flowchart showing a system processing procedure according to the first embodiment of the present invention.

FIG. 5 is a flowchart showing a system processing procedure according to the first embodiment of the present invention.

FIG. 6 is a block diagram showing the basic configuration of a second embodiment of the present invention.

FIG. 7 is a block diagram showing the circuit configuration of a second embodiment of the present invention.

FIG. 8 is a flowchart showing a system processing procedure according to a second embodiment of the present invention.

[Explanation of symbols]

10,50 CPU 20,60 System program memory 30,70
work memory

Claims (2)

[Claims] 1. A programmable controller that performs failure diagnosis for a plurality of component devices in an apparatus by processing a plurality of diagnostic processing programs, wherein one or more diagnostic processing programs among the plurality of diagnostic processing programs are provided. a specifying means for presetting a plurality of combinations of and specifying one or more diagnostic processes to be executed, an identifying means for identifying a combination of the diagnostic programs corresponding to the specified diagnostic process, and the identified combination. 1. A programmable controller comprising: instruction means for sequentially instructing a diagnostic processing program to be executed according to the instructions. 2. In a programmable controller that performs failure diagnosis for a plurality of component devices in an apparatus by arithmetic processing a plurality of diagnostic processing programs, a specifying means for specifying two or more diagnostic processes to be executed; A programmable controller comprising: integrating means for integrating two or more diagnostic programs corresponding to designated diagnostic processing into one program prior to execution of the failure diagnosis.