JPH0651810A - Programming device for pc - Google Patents

Abstract

PURPOSE:To accelerate the operation monitor of a programmable controller by preserving the source program of a bladder circuit together with the identification code and displaying a stored ladder circuit diagram on a screen at the time of monitor when an identification code is coincident with the identification code of the stored source program. CONSTITUTION:At the time of loading a program to the programmable controller, the identification code and the source program of the ladder circuit are inputted from a floppy disk 16 and stored in a RAM 15. At the time of operation monitor, an identification code is read from the programmable controller, the source program is read into the RAM 15 together with the identification code and when the identification code read from the programmable controller is coincident with the identification code stored in the RAM 15, state data are read from the programmable controller. According to the source program stored in the RAM 15, the ON/OFF state of the contact of a circuit diagram is displayed on a CRT 12 together with the ladder circuit diagram.

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 high speed.

[0002]

2. Description of the Related Art Conventionally, when a PC operation program is created, 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 by the PC and loaded into the PC.

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

[0004]

The following two methods are adopted to know the program loaded in the PC. A first method is a method of reading an object program stored in a PC by a programming device, converting it into a source program corresponding to a ladder circuit diagram, and displaying the ladder circuit diagram according to the source program. In the second method, since the source program and the object program corresponding to the ladder circuit diagram are stored in the external storage medium such as FD at the time of creation, the object program loaded in the PC is read and F
This is a method of collating the contents with the object program stored in D.

In any of the above methods, it takes time to confirm the program loaded in the PC, and the PC is displayed on the screen.
It took a lot of time to display the operation of. The operation monitor of the PC is often performed to identify a failure when the system fails. This has been a cause of the time required for failure recovery.

The present invention has been made to solve the above problems, and an object thereof is to speed up the operation monitor of a PC.

[0007]

SUMMARY OF THE INVENTION According to the invention for solving the above-mentioned problems, in a programming device in which the operating state of a programmable controller is displayed by a ladder circuit, the programming of the ladder circuit defining the operation of the programmable controller is performed. End detection means for detecting the end time, identification code creation means for creating the identification code of the ladder circuit, and data storage for storing the 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, and a loading means for loading an object program corresponding to the ladder circuit to the programmable controller together with its identification code, and an identification stored in the data storage means when displaying the operating state of the programmable controller. Determining means for determining whether or not the code and the identification code stored in the programmable controller match, and when the determining means determines that the two identification codes match, the programmable controller outputs the input / output element The display means is provided for inputting state data and displaying the operating state of the ladder circuit according to the source program of the ladder circuit stored in the data storage means.

[0008]

When the programming of the ladder circuit is completed, the identification code for identifying 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 different ladder circuits will be completed on the same date and time. Therefore, different identification codes are attached to different ladder circuits. This identification code is loaded and stored when the object program of the ladder circuit is loaded on the PC. The programming device stores the source program of the ladder circuit along 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 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 source program of the ladder circuit stored in the programming device, the state data of the input / output element is read from the PC, and the contact The on or off state is displayed.

As described above, in the apparatus of the present invention, it is not necessary to read all the object programs stored in the PC, perform inverse conversion, and 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]

EXAMPLES The present invention will be described below based on specific examples. FIG. 2 shows the configuration of a transfer machine controlled by a plurality of PCs PC01 to PC32. Stations of transfer machine ST0, ST1L, ST1R, ... ST3R
Are controlled by corresponding PCPC01 to PC32, respectively, and each PCPC01 to PC32 is coupled to each other by a link line L. In addition, each station ST
0, ST1L, ST1R, ... ST3R are provided with devices M1, 11M, ... 32M, respectively, as shown in the drawing.

FIG. 1 is a block diagram showing a concrete configuration of the programming apparatus of this embodiment. CPU for creating, modifying, displaying ladder circuit diagrams, and displaying PC operations
10, ROM1 storing the program for the processing
1, a CRT 12 for displaying a ladder circuit and an operating state, a keyboard 13 for inputting data of symbols of input / output elements for creating a ladder circuit and various commands, a CPU 1
0, the CRT 12 and the keyboard 13, an input / output interface 14, a RAM 15 for storing a source program and an object program of a ladder circuit together with its identification code, and a floppy disk for storing the source program stored in the RAM 15 on a floppy disk. It is composed of an apparatus and an interface 17 for connecting to the PC 01. In addition, RAM15,
An ID area 151 for storing an identification code, a ladder circuit diagram area 152 for storing a ladder circuit diagram as a symbol, a source program area 153 for storing a source program corresponding to the ladder circuit, and an 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 PC 01 stores a CPU 20 for sequence control and communication control, a sequence control program (object program) and link parameters, and a 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 in which a program for processing execution of the CPU 20 is stored. 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. RAM
The input element state memory 251, the output element state memory 252, the internal relay memory 253, the link element memory 254, the link parameter memory 255, the sequence control program memory 256, and the identification code (ID) 25 store the states of the input / output elements. An ID memory 257 for storing is stored. Of these, the sequence control program memory 2
In 56, an object program corresponding to a ladder circuit that defines order control is stored. In addition, the internal relay memory 253 is used as a virtual relay for relaying the ladder circuits in each row and also as a relay for detecting a failure.

FIG. 4, FIG. 5, and FIG. 6 are flow charts showing the procedure processed 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 or not the ladder circuit has been created depending on whether or not the data input from the keyboard 13 is END. If the ladder circuit has not been created, the ladder circuit is created continuously in step 100.
If the ladder circuit has been created, step 1
In 04, from the value of the timer of the CPU 10, the date and time at the end of creation (year, month, day, hour, minute,
Seconds) is calculated. Then, the series of numerical values of the date and time 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 device (FD) 16 together with the identification code.

FIG. 5 is a flow chart showing the procedure of processing by the CPU 10 when the program is loaded into the PC. In step 200, it is determined whether or not a program load command is issued 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 and I of the RAM 15 respectively.
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 the RAM1
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 into the PC via the input / output interfaces 14 and 28, and the loaded codes are respectively loaded into the PC. It is stored in the ID memory 257 and the order control program memory 256 of the RAM 25.

FIG. 6 shows a CPU for monitoring the operation of the PC.
11 is a flowchart showing a processing procedure by 10. In step 300, it is determined whether the command input from the keyboard 13 is an operation monitor. If it is an operation monitor command, the process proceeds to step 302 and the PC 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 this PC is displayed on the CRT 12. Then, in step 304, the process waits until a command for reading the source program from the FD 16 is input, and when the read command is input, step 305
At, the source program is read into RAM 15 together with the identification code. Next, in step 304, the identification code read from the PC and the RA of the programming device
It is determined whether or not the identification code stored in the ID area 151 of M15 matches. If the two identification codes match, the process proceeds to step 306 and the status data is read from the input element memory 251, the output element memory 252, and the internal relay memory 253 of the RAM 25 of the PC.

Next, in step 308, RAM1
In accordance with 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 or OFF state of the contacts of the circuit diagram. Next, at step 310, it is judged whether or not the operation of the PC is completed, and until the operation of the PC is completed, P
Steps 306 and 308 are repeated according to the flow of the operation of C, and the ladder circuit diagram and the contact state are displayed as shown in FIG. When the operation is monitored while the operation is stopped due to a malfunction of the PC, all ladder circuits and 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, and the source program of the ladder circuit loaded on the PC of the CRT 12 and the programming device 1 are stored. CR is displayed to the effect that it does not match the source program
Displayed at T12.

In this case, the source programs of the other ladder circuits, together with their identification codes, are transferred from the FD 16 to the RAM 1
After reading 5, the process is repeated from step 300. Thus, 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 in the PC. Therefore, the operation of the operation monitor of the PC can be speeded up. Although the date and time at the end of programming is used as the identification code in the above embodiment, the present invention is not limited to this, and the start time of programming,
It can be any time during programming, and need not be the time itself.

[Brief description of 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 showing the configuration of a PC to which the programming device of the present embodiment device is connected.

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

FIG. 5 is a flowchart showing a processing procedure of the programming device of the present embodiment.

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

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

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Programming device 10 ... CPU (date / time detection means, identification code creation means, loading means, determination 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 202-206 ... Loading means Step 300 to 304 ... Judgment means Steps 306, 308 ... Display means

Claims (1)

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