JPH10340109A - Multiprogram display of programmable controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To perform the supervision of an execution state of each program and the confirmation of an operation timing in real time and to facilitate program production, editing, etc., by displaying a ladder program and a motion program on the same screen of a programming device. SOLUTION: A dedicated instruction which simultaneously shows a ladder program and a motion program is sent to a CPU module 2 by performing key inputting of a multi-display instruction key that is previously prepared on the side of a system. The module 2 receiving it adds necessary information to the execution state display of the ladder program, a motion module 3 inputs necessary information to the execution state display of the motion program, and it is sent as one-dimensional data to a programming device 1. After the device 1 converts the one-dimensional data into bitmap data, it is simultaneously shown on a monitor.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a multi-program display device for displaying the execution states of a ladder program and a motion program of a programmable controller on the same screen in real time.

[0002]

2. Description of the Related Art When performing motion control in a conventional programmable controller (hereinafter abbreviated as PC),
The execution state of the ladder program (main program of the PC) and the execution state of the motion program (dedicated control program for servomotors and the like) are displayed on a display device by a programming device. However, since the execution states of the respective programs cannot be displayed on the same screen of the display device, they have to be displayed on separate screens. This is because the data for displaying each execution state is managed separately in the CPU module for the ladder program and separately in the motion module for the motion program. In addition, in order to obtain each data, each dedicated instruction must be used. FIG. 4 shows a conceptual diagram of program execution of the CPU module and the motion module. The relationship between the CPU module 2 and the motion module 3 is that the CPU module 2 is a client for motion control and the motion module 3 is a server for motion control.
A motion program 104 describing motion control is stored in the motion module 3 in order to minimize the influence of the scanning process. Ladder program 1
03, select the motion program 104 to be executed,
When a command for executing the program operation is started after setting the mode of the motion module 3, a motion program 104 for operating the XY table as shown in the figure is executed. Such an execution state is displayed on the display device of the programming device 1 by the motion program 1.
04 can be displayed. However, in this case, C
There is a case where the user wants to view the ladder program 103 in the PU module 2 at the same time. Also, if you try to display them simultaneously without displaying them on separate screens, it is necessary to execute the previous instruction alternately, and the data update interval of each execution state will be longer, and it will be displayed in the actual processing. But could not catch up with real-time simultaneous display. Therefore, when trying to display simultaneously, only the status display for each program could be performed.

[0003]

As described above, in the conventional apparatus as described above, the motion program 104 is started by the ladder program 103.
There is a problem in that each program itself is processed in the CPU module 2 and the motion module 3 in parallel. In addition, motion program 10
4 and the ladder program 103 can exchange data with each other, and the execution of each program is controlled by the state and content of the data. It is troublesome to sequentially switch the screen and display the state of each of the programs processed in parallel in this way,
It is impossible to simultaneously monitor ever-changing conditions. SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems of the conventional technology, and has been made in order to be able to simultaneously display the execution states of a ladder program and a motion program of a PC on a display device on a programming device in real time. It is another object of the present invention to provide a multi-program display device for a programmable controller which facilitates program creation, editing, and maintenance.

[0004]

According to the present invention, there is provided a logic decoding unit for decoding and processing a ladder program, a ladder program memory for storing the ladder program, and storing various information. A CPU module having a data memory, a communication device for transmitting and receiving data to and from a programming device by communication, an operation unit for decoding and processing a motion program, a motion program memory for storing the motion program, and various types of information. A motion module having a data memory for storing, a shared memory for exchanging data with the CPU module, and multi-program display means for simultaneously displaying the ladder program and the motion program on a display device. Features. That is, when the execution states of the ladder program and the motion program are simultaneously displayed on the programming device of the PC, it is not necessary to collect data separately by using a dedicated instruction for each program. Prepare a multi-display command for the multi-program display means, which is a dedicated command that can simultaneously acquire the execution status of the ladder program and the motion program, and input the multi-display command from the dedicated key. Both sides simultaneously prepare execution state data at the same time, and the programming device having the multi-program display means prepares a display frame for simultaneously displaying the execution states of the ladder program and the motion program. The CPU module sequentially obtains the display data prepared by the motion module at the time of inputting the multi-display command key from the motion module management data as the display data from the motion module through the shared memory in accordance with the display timing. , So that the data can be centrally managed together with the display data of the execution state of the ladder program so that the data can be centrally output on the monitor of the programming device. The management place is managed in a data memory or the like. CP
The U module simultaneously outputs the display data of the execution states of the two programs that are centrally managed to the programming device, and the programming device converts the input data into image display data and displays the data at the respective display positions. To monitor the execution state of the ladder program and the motion program in real time on the same screen. As described above, the ladder program and the motion program are displayed on the same screen and their execution states can be monitored at the same time, thereby facilitating the design, editing and maintenance of the ladder program and the motion program.

[0005]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a system configuration diagram of a programmable controller according to an embodiment of the present invention. FIG. 2 is a configuration diagram of a programming device, a CPU module, and a motion module of FIG. 1, and FIG. It is a figure showing a multi-program display screen. 1 and 2, a programming device 1 includes a CPU 11, a ROM 12, a RA
M13, communication interface 15, CRT display device 16
1, CRT controller 162, bitmap memory 1
63. The CPU 11 performs data processing by communication with the CPU module 2, decodes data in the RAM 13, and controls the bitmap memory 163. The ROM 12 stores an arithmetic processing procedure of the CPU 11. The bitmap memory 163 stores the CPU 11
It stores display-related data (bitmap data) among the data transmitted and received from the module 2. RAM 13
Stores data other than the bitmap data.
Further, data in data exchange with the CPU module 2 is also stored here. External storage device interface 1
Reference numeral 4 interfaces data communication with an external storage device such as a floppy disk. Communication interface 1
Reference numeral 5 interfaces data communication with the CPU module 2. The CRT controller 162 controls the bit map data in the bit map memory 163 to be displayed on the CRT display device 161. CRT display device 16
1 indicates the bitmap data in the bitmap memory 163. The keyboard 17 is used for writing, reading, creating, changing, monitoring, saving, and the like of various programs. When the display operation is performed by the programming device 1 having such a configuration, the programming device 1
The ladder program of the PU module 2 and the motion program of the motion module 3 and information relating to them are input via the communication interface 15 of the CPU module 2 and stored in the bitmap memory 163.
Bitmap memory 1 by RT controller 162
The data in 63 is displayed on the CRT display device 161. C
The PU module 2 includes a CPU 21, a ROM 22, a ladder program memory 23, a data memory 24, a bus interface 25, and a communication interface 26. The CPU 21 performs data processing through communication with the programming device 1 and decodes a ladder program stored in the ladder program memory 23.
The ROM 22 stores an arithmetic processing procedure (control program) of the CPU 21. The ladder program memory 23 stores C
The ladder program decoded by the PU 21 is stored. The data memory 24 stores data other than the ladder program. Further, data in data exchange with the motion module 3 is also stored here. The bus interface 25 interfaces data transmission with the motion module 3 via the mount base. The communication interface 26 interfaces data communication with the programming device 1 or the like. CP like above
When the ladder program is decoded and processed by the U module 2, input data is fetched from the input / output module 6 via the mount base 5, processed, and the decoded result is output to the output module 6. In addition, data is periodically transferred via the motion module 3 and the mount base 5. The data includes information for controlling the motion program from the ladder program, and information such as an execution state and an alarm from the motion module 3. The motion module 3 includes a CPU 31,
ROM 32, motion program memory 33, data memory 34, bus interface 35, shared memory 3
6. The servo interface 37. CP
The U 31 performs data processing by data transmission with the CPU module 2, and decodes a motion program stored in the motion program memory 33. The ROM 32 stores an arithmetic processing procedure (control program) of the CPU 31. Motion program memory 3
3 stores a motion program decoded by the CPU 31. The data memory 34 stores data other than the motion program. Further, data in data exchange with the CPU module 2 is also stored here. The bus interface 35 interfaces data transmission with the CPU module 2 via the mount base 5. The shared memory 36 holds data exchanged with the CPU module 2 via the bus interfaces 25 and 35. The servo interface 37 controls the servo amplifiers 7, 8, and 9. The motion module 3 described above decodes the motion program and issues a position control command to the servo amplifiers 7, 8, and 9. The servo amplifiers 7, 8, 9 receive the position control command from the motion module 3 and control the motors 100, 110, 120. The power supply module 4 is connected to the C
Power is supplied to the PU module 2, the motion module 3, and the input / output module 6. The mount base 5 supplies power to each module and has a data bus to assist in data transfer between the CPU module 2, the motion module 3, and the input / output module 6. The input / output (I / O) module 6 exchanges data with the outside. The operation for simultaneously displaying the execution states of the ladder program and the motion program on the CRT 161 of the programming device 1 is as follows. The motion module 3 always prepares control information, an execution state (a program number and a line number), and information such as a current position in the shared memory 36. Keyboard 1 of programming device 1
If you enter a multi-display command from the dedicated key using 7
The CPU module 2 receives the “multi-display command” from the programming device 1 and adds necessary information from the information stored in the data memory 24 together with the ladder execution state, and the bit map memory 1 of the programming device 1
A response is returned to 63. In the programming device 1, the CRT
The controller 162 determines the execution state of the ladder and the execution state of the motion program based on the response data sent from the bit map memory 163 to the CRT display device 16.
1 are displayed simultaneously. Thus, according to the present invention,
First, the ladder program is displayed on the programming device 1, and only the execution state of the ladder program is displayed on the display device at this stage. Here, in order to display the execution state of the motion program on the same screen, a "multi-display instruction key" prepared in advance by the system is input. The programming device 1 that has accepted the key input is a CP
What is necessary is just to transmit to the U module 2 a dedicated instruction “multi-display instruction” for displaying the execution state and simultaneous display of the ladder program and the motion program. When recognizing the received “multi-display command”, the CPU module 2 inputs information for displaying the execution status of the motion program from the motion module 3 side in addition to the information necessary for displaying the execution status of the ladder program. The data is returned to the programming device 1 at the same time as data in a unified format. Here, information for displaying the execution state of the motion program added by the CPU module 2 is stored in the motion module 3 when the CPU module 2 and the motion module 3 periodically exchange control information via the shared memory. This is real-time display data of the execution state of the motion program obtained from the side, and is constantly updated to the latest information. Thus, in the case of the present embodiment, the data in the execution state is transferred at high speed in real time as compared with the conventional circuit, so that the data transmission speed and the memory capacity are increased. The programming device 1 converts the unified data of the execution state of the returned ladder program and the unified data of the execution state of the motion program into bitmap data, and displays them as real-time images on the monitor at each designated position as shown in FIG. And upper and lower (upper: ladder program, lower: motion program). Of course, the order may be reversed, and the ladder program can be displayed on the lower side while the motion program is being displayed on the screen. In this embodiment, the programming device 1 has been described as a line monitoring monitor.
Used a CRT display device, but other display devices (for example,
Liquid crystal display device) and a programming device 1
However, the present invention is not limited to this, and can be applied to a display system such as a monitor of another device at a site in a distributed system, or a handy type tool box having a communication function.

[0006]

As described above, according to the present invention, the execution state of the ladder program and the motion program can be monitored by displaying the ladder program and the motion program on the same screen of the programming device.
The operation timing of each program can be confirmed in real time, which has the effect of facilitating program creation, editing and maintenance.

[Brief description of the drawings]

FIG. 1 is a system configuration diagram of a programmable controller according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of a programming device, a CPU module, and a motion module of FIG. 1;

FIG. 3 is a diagram showing a multi-program display screen of the programmable controller shown in FIG. 1;

FIG. 4 is an explanatory diagram of program control of a conventional programmable controller.

[Explanation of symbols]

 Reference Signs List 1 programming device 11 CPU 12 ROM 13 RAM 14 external interface 15 communication interface 161 CRT display device 162 CRT controller 163 bitmap memory 17 keyboard 2 CPU module 21 CPU 22 ROM 23 ladder program memory 24 data memory 25 bus interface 26 communication interface 3 motion Module 31 CPU 32 ROM 33 Motion program memory 34 Data memory 35 Bus interface 36 Shared memory 37 Servo interface 4 Power supply module 5 Mount base 6 Input / output module 7, 8, 9 Servo amplifier 100, 110, 120 Motor

Claims (1)

[Claims] 1. A logic decoding unit for decoding and processing a ladder program, a ladder program memory for storing the ladder program, a data memory for storing various information, and a communication device for exchanging data with a programming device by communication. A processing module for decoding and processing a motion program; a motion program memory for storing the motion program; a data memory for storing various information;
A shared memory for exchanging data with the U module,
And a multi-program display unit for simultaneously displaying the ladder program and the motion program on a display device.