JPH06309026A - Manual operation teaching device for programmable controller - Google Patents

Abstract

PURPOSE:To improve the teaching operability by comparing actual operation data with teaching data corresponding to the same teaching step as an execution step, and reading a comment showing information on operation to be done next out of the teaching comment memory and displaying it. CONSTITUTION:When the mode changeover switch of the manual operation teaching device is set to an execution mode, a CRT display is cleared and an execution step counter value is cleared. Then when a signal of comparison execution allocated to an input port 2 is ON, the actual operation data corresponding to the execution step which is actual operation data held in the input port 2 is compared with the teaching data corresponding to the teaching step which is teaching data stored in an teaching data memory 6. When they match each other, the comment corresponding to the execution step counter is read out of the teaching comment memory 7 and displayed on a CRT. When not, on the other hand, the execution step counter value is increased and a comparison is made again.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manual operation teaching device for a programmable controller (hereinafter abbreviated as PLC) that controls a machine that performs step operation of an automatic production line.

[0002]

2. Description of the Related Art Conventionally, a machine for performing a step operation in an automatic production line becomes difficult to operate manually as the machine becomes more complicated. Therefore, only a skilled operator can operate the machine. It was in the state of operating. Therefore, when performing manual operation with the control device, appropriate operation teaching (operation guide)
A device for performing the above is required, and the manual operation teaching program is used by being incorporated in the PLC that executes the operation sequence of the machine.

[0003]

However, in the prior art, there were the following problems when creating a program for manual operation teaching. That is, as the machine operation becomes more complicated, the teaching program becomes more complicated, the design man-hours of the teaching program of the PLC that executes the machine operation sequence become excessive, and the execution program memory also increases. Time) becomes longer,
Eventually, the machine cycle time will be extended. In addition, there is a problem in that changing the teaching program accompanying the change in the operation sequence of the machine becomes a great work. Therefore, an object of the present invention is to solve these problems and to provide a manual operation teaching device capable of performing operation teaching (operation guide) necessary for manual operation by a simple teaching operation.

[0004]

In order to solve the above problems, the present invention provides a programmable controller and a CRT.
In a manual operation teaching device for a programmable controller that guides a manual operation in combination with a device, the manual operation teaching device includes an input port 2 using a 2-port RAM connected to a system bus of the programmable controller, and a CPU 3 A teaching system memory 4 for storing a teaching system program, a working memory 5, a teaching data memory 6 for storing teaching data obtained from the programmable controller via the input port 2, and a manual operation teaching comment Teaching memory 7 for storing comments, dictionary memory 8 for comments, and CR
The teaching system memory 4 includes a CRT controller 9 for an interface between the T and the keyboard, and an I / O controller 10, and the teaching system memory 4 stores teaching data corresponding to a teaching step in the teaching data memory 6. And an initial setting process for clearing the memory for storing teaching data and setting the number of data obtained from the input port, a comment input process for storing a comment displayed on the CRT screen in the memory, and the teaching data storage means. Teaching data editing means for editing the teaching data stored by the input port 2 during actual operation.
The actual operation data corresponding to the execution step obtained via the instruction data is compared with the teaching data corresponding to the same teaching step as the execution step, and when they match, a comment representing the operation information to be operated next is added to the teaching comment memory. 7 and a teaching execution means for outputting the data to the CRT device.

[0005]

With the above-mentioned means, since the operation teaching required for the manual operation is displayed on the CRT screen, even an unskilled person can easily perform the manual operation.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing an embodiment of the present invention, in which 100 is a PLC and 200 is a manual operation teaching device. The manual operation teaching device 200 includes an input port 2 (2-port RAM) connected to a system bus 1 of a PLC, a CPU 3 (microprocessor) for executing processing of the manual operation teaching device, and a teaching system memory for storing a teaching system program. 4 (ROM), working memory 5 (RA required for data processing when the system program is executed
M), a teaching data memory 6 (RAM) for storing teaching data (data representing input / output states of limit switches, solenoid valves, etc. connected to the machine) temporarily stored in the input port 2-port RAM, Teaching comment memory 7 (RA for storing comments for manual operation teaching)
M), dictionary memory 8 for storing a dictionary for teaching comments
(ROM), CRT 11 and keyboard 12 for performing comment input editing operation and manual operation teaching (comment display)
And a CRT controller 9 connected thereto, and an I / O controller 10 for performing mode selection of a manual operation teaching device and input control of a signal writing switch (teach switch) for storing teaching data from the input port. . The input port 2 has a comparison execution signal for causing the teaching device to compare the teaching data stored in the memory with the data of the input port in the teaching execution means, and teaching data (input / output of a limit switch / valve of a machine or the like). And (data representing the status signal) can be stored by using the PLC. In the following description, it is assumed that the comparison execution signal and the teaching data corresponding to each teaching step are previously stored in the memory of the input port 2 using the PLC. Hereinafter, the teaching data storage means, the teaching data editing means, and the teaching executing means will be described in this order. Note that the three-digit number in parentheses is the step number of each of the flows in FIGS. 2 to 7, and the number of 100s is the same as the number in each figure (for example, the step number in FIG. , 302, 3
It's 03). FIG. 2 is a diagram for explaining the teaching data storage means, and shows a processing flow for storing teaching data for each of the teaching steps obtained from the input port 2. For convenience of explanation, it is assumed that the initial setting of the manual operation teaching device has already been completed. The contents of the initial setting will be described later in the editing means. The mode of the manual operation teaching device is selected as the teaching mode, the machine is returned to the origin position by the manual operation of the PLC, the input state of the write switch of the manual operation teaching device is confirmed (201), and if it is ON, the input port 2 The data (bit information) is stored in the teaching data memory 7 (RAM) as teaching data for the first step (202). Next, when the teaching data is stored (203), the teaching step counter N is incremented (20
4) Then, the teaching of the next step is awaited (201). 1 by PLC until manual operation of machine completes 1 cycle
Every time the step manual operation is performed, (201) to (20
The teaching to the manual operation teaching device is completed by repeating 4). 3, 4, 5, and 6 are diagrams showing the processing flow of the teaching data editing means, FIG. 3 is the processing flow of the teaching data editing means, FIG. 4 is the initial setting processing flow in the editing mode, and FIG. FIG. 6 is a processing flow of the comment input operation in the editing mode, and FIG. In addition, FIG. 8, FIG. 9, FIG.
11 and 12 are CRT screens for executing the editing means, FIG. 8 is a screen example for selecting an initial setting processing screen, a comment input screen, and a teaching data editing screen, and FIG. 9 is a teaching data storage memory. 1 and a screen example for inputting the number of data obtained from the input port and clearing the memory contents of the teaching comment storage memory, FIG. 10 is a screen example for inputting a comment to be operated on the CRT screen at the time of teaching execution, and FIG.
1 is a data editing method (change / addition / deletion) for each step of teaching data stored in the memory during teaching operation.
FIG. 12 is an example of a screen for selecting, and FIG. 12 is an example of a screen for changing and adding the pit state of the corresponding step by changing and adding on the screen of FIG. The teaching data editing means will be described below with reference to the processing flows shown in FIGS. 3, 4, 5, and 6. When the manual operation teaching device is selected in the edit mode, the program for the teaching data editing process of FIG. 3 is selected, and the edit mode menu screen shown in FIG. 8 is displayed on the CRT screen (301). On this screen, any one of initial setting (302), teaching comment input (303), and teaching data editing (304) is selected from the keyboard 12. When the initial setting is selected (302), the process is switched to the initial setting process of FIG. 4, the CRT screen becomes the edit mode initial setting screen shown in FIG. 9 (401), and the corresponding item is selected from the keyboard 12 to input the initial setting. When initialization is executed (402), the teaching data memory 6 and the teaching comment memory 7 are all cleared (403).
Next, input the number of teaching data of the input port (40
5), the number of teaching data bytes is stored in 2 bytes from the start address of the teaching data memory 6. This is to determine the address of the teaching data memory 6 which stores the teaching data for each step from the input port. Next, when the teaching comment input in the edit mode is selected and selected (303), the comment input process of FIG. 5 is switched to, and the CRT screen is displayed as shown in FIG.
The edit mode teaching comment input screen shown in 0 is displayed (50
1) Select the relevant item from the keyboard 12 and input. Step NO. When the corresponding comment is input (502) and then the corresponding comment is input (503), it is stored in the corresponding address of the teaching comment memory 7. Such input is repeated for all steps of the PLC to input a comment. Next, when the teaching data edit is selected (304), the teaching data editing process of FIG. 6 is switched to, and the CRT screen is displayed as shown in FIG.
The teaching data edit screen shown in (601) is displayed, and the corresponding step NO. Enter (60
2) Then, when any one of the edit items (change / addition / deletion) is selected and executed, the processes following step (602) in FIG. 6 are executed. That is, when "change" is selected and executed (603), the corresponding step NO. The teaching data of is read from the teaching data memory 6 and the state is displayed on the screen shown in FIG. 12 (608). Whether it is a change by the keyboard 12 or a writing (teach) operation on this screen is made by a person's judgment (609). In the change by the keyboard 12, it can be changed by moving the cursor to the bit to be changed and performing a set bit or a clear bit (610). . The change by writing (teach) can be performed by manually operating the machine on the PLC side and turning on the write (teach) switch in the corresponding step state (611). When "Add" is selected and executed (604), the memory area for storing the teaching data is secured in the corresponding step memory area in the teaching data memory 6 (606), and the teaching counter value (N) is incremented (607). The memory secured state is displayed on the screen of FIG. 12 (608). On this screen, it is a human judgment whether the change is made by the keyboard 12 or the writing (teach) operation (609). When making the change by the keyboard 12, the cursor is moved to the bit to be changed and the set bit or the clear bit is changed (610). it can. For changes by writing (teach), PLC
It can be changed by manually operating the machine on the side and turning on the write (teach) switch in the corresponding step state (611). Further, the teaching data after the corresponding step is rearranged. When "Delete" is selected (605) and executed, all teaching data in the corresponding step memory area of the teaching data memory 6 is deleted, and the data after the corresponding step is rearranged. FIG. 7 shows a processing flow of the teaching execution means. The data at the time of actual operation of the input port 2 forming the manual operation teaching execution and the teaching data stored in the teaching data storage memory (RAM) 6 by the teaching editing means. Compare and execute. The teaching executing means will be described below with reference to FIG. When the mode change switch of the manual operation teaching device is selected to the "execution mode", the CRT display is first cleared (701) and the execution step counter value (C) is cleared (702). Next, if the comparison execution signal assigned to the input port 2 is ON (703), the input port 2
Which is the actual operation data (data representing the ON / OFF state signal of the machine's limit switch / valve output, etc. during actual operation), which corresponds to the execution step, and the teaching data memory 6 Comparing the teaching data corresponding to the same teaching step with the teaching data stored in (704), and if the comparison results match (705), the comment corresponding to the executing step counter is written. It is read from the teaching comment memory 7 and displayed on the CRT. If the comparison result does not match, the execution step counter value (C) is incremented (70
7) If the execution step counter value (C) is smaller than the teaching step counter value (N) (708), the teaching data of the next step is compared again. If the comparison execution result does not match and the execution step counter value (C) is larger than the teaching step counter value (N) (708), the execution step counter value (C) is cleared and the comparison is performed again from the beginning.

[0007]

As described above, according to the present invention, it is possible to perform a very simple teaching operation without requiring specialized knowledge.
It is possible to teach the state of the machine for each step, and since the editing operation can be performed with a simple procedure, it is possible to significantly reduce the design man-hours as compared with the conventional PLC manual operation teaching program. Work can be done quickly.

[Brief description of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention.

FIG. 2 is a processing flow of teaching data storage means.

FIG. 3 is a processing flow of teaching data editing means.

FIG. 4 is a flow chart of initial setting in edit mode.

FIG. 5 is a process flow of a comment input operation in edit mode.

FIG. 6 is a flowchart of teaching data editing processing in an editing mode.

FIG. 7 is a processing flow of teaching execution means.

FIG. 8 is an edit mode menu screen.

FIG. 9 is an edit mode initial setting screen.

FIG. 10 is an edit mode teaching comment input screen.

FIG. 11 is a teaching data edit screen.

FIG. 12 is a teaching data content display screen.

[Explanation of symbols]

 1 PLC data bus 2 Input port 3 CPU 4 Teaching system memory 5 Working memory 6 Teaching data memory 7 Teaching comment memory 8 Dictionary memory 9 CRT controller 10 I / O controller 11 CRT 12 Keyboard

Claims (1)

[Claims] 1. A programmable controller, CRT
In a manual operation teaching device for a programmable controller that performs an operation guide of a manual operation in combination with a device, the manual operation teaching device includes an input port 2 using a 2-port RAM connected to a system bus of the programmable controller, A CPU 3, a teaching system memory 4 for storing a teaching system program, a working memory 5, a teaching data memory 6 for storing teaching data obtained from the programmable controller through the input port 2, and a manual operation teaching A teaching comment memory 7 for storing comments, a dictionary memory 8 for comments,
CR for interface between CRT and keyboard
The teaching system memory 4 includes a T controller 9 and an I / O controller 10, and the teaching system memory 4 stores teaching data storage means for storing the teaching data corresponding to a teaching step in the teaching data memory 6, and teaching data. Initialization processing to clear the memory and set the number of data obtained from the input port,
A comment input process for storing a comment displayed on the CRT screen in the memory, a teaching data editing unit for editing the teaching data stored by the teaching data storing unit, and a data input unit 2 which is obtained through the input port 2 during actual operation. By comparing the actual operation data corresponding to the execution step and the teaching data corresponding to the same teaching step as the execution step,
A manual operation teaching device for a programmable controller, comprising: a teaching execution means for reading out a comment representing operation information to be operated next from the teaching comment memory 7 and outputting the comment to the CRT device when they match.