JP3309434B2 - PC programming device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a programming device capable of monitoring the operating state of a programmable controller (hereinafter, referred to as "PC") at a high speed.

[0002]

2. Description of the Related Art Conventionally, when creating an operation program for a PC, a ladder circuit diagram is created using a programming device. The source program corresponding to the ladder circuit diagram is converted into an executable object program that can be executed on the PC, and is loaded on the PC.

When displaying the operating state of the PC, a ladder circuit diagram is displayed on the screen of the programming device, and the fact that the contacts are on or off is displayed on the circuit diagram. Therefore, in order to display the operating state of the PC, it is necessary to know the program loaded on the PC.

[0004]

The following two methods are used to determine the program loaded on the PC. The first method is a method of reading an object program stored in a PC into a programming device, inversely converting the object program into a source program corresponding to the ladder circuit diagram, and displaying the ladder circuit diagram according to the source program. In the second method, the source program and the object program corresponding to the ladder circuit diagram are stored in an external storage medium such as an FD at the time of creation.
In this method, the content is compared with the object program stored in D.

[0005] In any of the above methods, it takes time to check the program loaded on the PC, and the PC is displayed on the screen.
It took a lot of time to display the operation. The monitoring of the operation of the PC is often performed to determine a failure when a failure occurs in the system. This has caused a long time for the recovery from the failure.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and an object of the present invention is to increase the speed of an operation monitor of a PC.

[0007]

According to a first aspect of the present invention, there is provided a programming device for displaying an operation state of a programmable controller by a ladder circuit. End detection means for detecting the end time, identification code creation means for creating an identification code of the ladder circuit, and data storage for storing a source program of the ladder circuit together with the identification code when the end of the programming is detected by the end detection means. Means for loading an object program corresponding to the ladder circuit into the programmable controller, the loading means for loading the object program together with the identification code; and, when displaying the operation state of the programmable controller, the identification information stored in the data storage means. Determining means for determining whether the identification code matches the identification code stored in the programmable controller. If the determination means determines that the two identification codes match, the programmable controller determines whether the input / output element Display means for inputting state data and displaying the operation state of the ladder circuit in accordance with the ladder circuit source program stored in the data storage means.

[0008]

When the programming of the ladder circuit is completed, an identification code for specifying the ladder circuit is generated. If this identification code is, for example, the date and time at the end of programming, it is unlikely that a different ladder circuit will be completed on the same date and at the same time. Therefore, different identification codes are assigned to different ladder circuits. This identification code is loaded and stored together when the object program of the ladder circuit is loaded on the PC. The programming device stores the ladder circuit source program together with its identification code. When the operation of the PC is monitored, the identification code stored in the PC is read, and it is determined whether or not the identification code matches the identification code of the source program stored in the programming device. If the two identification codes match, the ladder circuit diagram is displayed on the screen according to the ladder circuit source program stored in the programming device, the status data of the input / output elements is read from the PC, and the The on or off state is displayed.

As described above, according to the apparatus of the present invention, there is no need to read out all the object programs stored in the PC and perform an inverse conversion or collate the contents with the program stored in another storage medium. , The program stored in the PC can be specified at high speed.
Therefore, the operation monitor of the PC can be performed at high speed.
As a result, failure recovery can be speeded up.

[0010]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to specific embodiments. FIG. 2 shows the configuration of a transfer machine controlled by a plurality of PCs PC01 to PC32. Each station ST0, ST1L, ST1R, ... ST3R of transfer machine
Are controlled by corresponding PCPC01 to PC32, respectively, and the PCPC01 to PC32 are mutually connected by a link line L. In addition, each station ST
.., ST3R are provided with devices M1, 11M,..., 32M, respectively, as shown in FIG.

FIG. 1 is a block diagram showing a specific configuration of the programming device of the present embodiment. CPU for creating, modifying, and displaying ladder circuit diagrams and displaying the operation of PCs
10. ROM 1 storing a program for the processing
1, a CRT 12 for displaying a ladder circuit and an operation state, a keyboard 13 for inputting symbol data and various commands of input / output elements for creating a ladder circuit, a CPU 1
0, an input / output interface 14 interposed between the CRT 12 and the keyboard 13, a RAM 15 for storing a ladder circuit source program and an object program together with its identification code, a floppy disk for storing the source program stored in the RAM 15 on a floppy disk An interface 17 for connecting to the device and the PC01. Also, the RAM 15
ID area 151 for storing an identification code, ladder circuit diagram area 152 for storing a ladder circuit diagram by symbol, source program area 153 for storing a source program corresponding to the ladder circuit, object program for storing an object program in a PC execution format An area 154 and a link parameter area 155 for storing link parameters are formed.

As shown in FIG. 3, the PC01 stores a CPU 20 for sequence control and communication control, a sequence control program (object program) and link parameters, and also controls the state of input / output elements to be controlled and It has a RAM 25 for storing the state of the link element received from the link line, and a ROM 21 for storing a program for executing the processing of the CPU 20. Input / output element 270
1, 2702 and the like are controlled by the CPU 20 via the drive circuit 27 and the input / output interface 24. Also RAM
Reference numeral 25 denotes an input element state memory 251, an output element state memory 252, an internal relay memory 253, a link element memory 254, a link parameter memory 255, a sequence control program memory 256, and an identification code (ID) for storing states of input / output elements. ID memory 257 is stored. Of these, the sequence control program memory 2
56 stores an object program corresponding to a ladder circuit that defines order control. The internal relay memory 253 is used not only as a virtual relay for relaying the ladder circuit of each row, but also as a relay for detecting a failure.

FIG. 4, FIG. 5, and FIG. 6 are flowcharts showing the procedure performed by the CPU 10. FIG. 4 shows a processing procedure by the CPU 10 when creating a ladder circuit. In step 100, a ladder circuit is created according to the data input from the keyboard 13. In step 102, it is determined whether the ladder circuit has been created based on whether the data input from the keyboard 13 is END. If the creation of the ladder circuit is not completed, the ladder circuit is continuously created in step 100.
When the creation of the ladder circuit is completed, step 1
In 04, the date and time (year, month, day, hour, minute,
Second) is calculated. Then, the numerical values of the series of times are used as the identification code (ID) of the created ladder circuit.

Next, in step 106, the source program corresponding to the created ladder circuit diagram is stored in the floppy disk drive (FD) 16 together with the identification code.

FIG. 5 is a flowchart showing a procedure performed by the CPU 10 when a program is loaded to the PC. In step 200, it is determined whether a program load has been instructed from the keyboard 13. When the program load is instructed, in step 202, the ID and the source program of the ladder circuit are input from the FD 16,
It is stored in the D area 151 and the source program area 153. Next, in step 204, the source program is converted into an object program, and
5 in the object program area 154.
Next, in step 206, the identification code and the object program stored in the ID area 151 and the object program area 154 of the RAM 15 are loaded on the PC via the input / output interfaces 14 and 28, respectively. Is stored in the ID memory 257 of the RAM 25 and the order control program memory 256.

FIG. 6 shows a CPU for monitoring the operation of a PC.
10 is a flowchart illustrating a processing procedure according to the first embodiment. In step 300, it is determined whether the command input from the keyboard 13 is an operation monitor. If the command is an operation monitor command, the process proceeds to step 302, where R
The identification code stored in the ID memory 257 of the AM 25 is read. Next, in step 303, the identification code read from the PC is displayed on the CRT 12. In step 304, the process waits until a command to read the source program is input from the FD 16.
The source program is read into the RAM 15 together with the identification code. Next, at step 304, the identification code read from the PC and the RA of the programming device are read.
It is determined whether the identification code stored in the ID area 151 of M15 matches. If the two identification codes match, the process proceeds to step 306 to read the status data from the input element memory 251, output element memory 252, and internal relay memory 253 of the RAM 25 of the PC.

Next, at step 308, the RAM 1
According to the source program stored in the source program area 153 of No. 5, the CRT 12 displays the ladder circuit diagram of the operating point of the PC and the on / off state of the contact point of the circuit diagram. Next, in step 310, it is determined whether or not the operation of the PC is completed.
Steps 306 and 308 are repeated according to the flow of the operation C, and the ladder circuit diagram and the contact state are displayed as shown in FIG. When the operation is monitored in a state where the operation is stopped due to the failure of the PC, all the ladder circuits and the contact states can be sequentially displayed by repeating steps 306 and 308.

If it is determined in step 304 that the identification codes do not match, the process proceeds to step 312, where the source program of the ladder circuit loaded on the PC to the CRT 12 and the program stored in the programming device 1 are stored. CR indicating that it does not match the source program
It is displayed at T12.

In this case, the source program of the other ladder circuit is transmitted from the FD 16 to the RAM 1 together with its identification code.
After reading to 5, the process is executed again from step 300. As described above, by comparing the identification codes, it is possible to instantly determine which source program stored in the FD 16 corresponds to the object program loaded on the PC. Therefore, the operation of the operation monitor of the PC can be speeded up. In the above embodiment, the date and time at the end of programming are used as the identification code, but the present invention is not limited to this.
The time may be any time during programming and may not be the time itself.

[Brief description of the drawings]

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

FIG. 2 is a block diagram showing a configuration of a transfer machine using a PC.

FIG. 3 is a block diagram illustrating a configuration of a PC to which a programming device of the device of the present embodiment is connected.

FIG. 4 is a flowchart showing a processing procedure of the programming device of the present embodiment.

FIG. 5 is a flowchart illustrating a processing procedure of the programming device according to the embodiment.

FIG. 6 is a flowchart showing a processing procedure of the programming device of the present embodiment.

FIG. 7 is a ladder circuit diagram showing an operation state.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Programming apparatus 10 ... CPU (date time detection means, identification code creation means, loading means, judgment means, display means) 13 ... Keyboard 12 ... CRT (display means) 15 ... RAM (data storage means) 16 ... Floppy disk device (Data storage means) 151 ID area (Data storage means) 153 Source program area (Data storage means) Step 104 Date / time detection means and identification code creation means Step 106 Data storage means Steps 202 to 206 Loading means Step 300-304: determination means Steps 306, 308: display means

──────────────────────────────────────────────────続 き Continued on the front page (58) Field surveyed (Int. Cl. ⁷ , DB name) G05B 19/04-19/05 G05B 23/00-23/02

Claims (1)

(57) [Claims] 1. A programming device for displaying an operation state of a programmable controller by a ladder circuit, wherein: an end detection means for detecting when the programming of the ladder circuit defining the operation of the programmable controller is completed; and an identification code of the ladder circuit. An identification code creating means for creating the program; a data storage means for storing a source program of the ladder circuit together with the identification code when the end of the programming is detected by an end detection means; When loading the corresponding object program, loading means for loading the object code together with the identification code; and when displaying the operation state of the programmable controller, the identification code stored in the data storage means and Determining means for determining whether or not the identification code stored in the programmable controller matches; and if the determination means determines that the two identification codes match, the input / output element from the programmable controller And a display unit for inputting the state data of the ladder circuit and displaying an operation state of the ladder circuit according to a source program of the ladder circuit stored in the data storage unit.