JPS60201407A - Numerical control device having trace function of input/ output signals, and contents of memory - Google Patents

Abstract

PURPOSE:To execute easily a maintenance and a check of a fault, and to shorten a down-time by displaying not only a present value but also its history with regard to the contents of input/output values. CONSTITUTION:When trace point information, sampling time information, and trigger information are inputted from a key input means, a data read means reads input/output signals, etc. designated by the trace point information among all input/output signals and the memory contents, at every designated sampling time, and stores them in a data storage means. Also, a trigger point detecting means monitors a state of input/output signals, and the memory contents designated by the trigger information, detects that they have been varied to a designated state, and sends out detecting information to a display data generating means. The display data generating means generates a graphed display data of a state that a history of the vicinity of a trigger point of the input/output signals and the memory contents, based on a data stored in the data storage means, and inputs and displays it on an indicator.

Description

TECHNICAL FIELD OF THE INVENTION The present invention relates to a numerical control device having a trace function capable of displaying input/output signals exchanged with a machine tool and temporal changes in memory contents on a display.

Prior Art and Problems Conventionally, numerical control devices have been known that display only the current values of input/output signals exchanged with a machine tool on a CRT or the like. This was done in consideration of convenience during maintenance and fault investigation, but in reality it was difficult to discover the cause of a fault using only the current value.

Purpose of the Invention The present invention has been made in view of the above circumstances.
The purpose of this is to display not only the current values but also the history of input/output signals, thereby making maintenance and fault investigation easier and reducing downtime.

Structure of the Invention FIG. 1 is an explanatory diagram of the structure of the present invention. Key human power means KE
From Y, trace point information for instructing what input/output signals and memory contents are to be displayed, sampling time information for instructing at what intervals to detect input/output signals, etc. Trigger information is input that instructs what position to set the trace starting point, that is, what signal changes and what contents are to be displayed. In the old data reading means, all input/output signals and input/output signals specified by the trace point information among the memory contents are read at every specified sampling time and stored in the data storage means MEM.

Further, the trace point detection means TG monitors the input/output signals specified by the trigger information and the state of the memory contents, and if these are in the specified state, for example, the signal changes from "'1" to "O" or " A change from '0' to '1' is detected and the detected information is sent to the display data creation means DI).

This display data creation means DD is data recording ↑, # means)
'Based on the data recorded in IBM, create graph display data that shows the history of input/output signals and memory contents near the trigger point, and input this to the display needle Y of a CRT, etc. and display it.

FIG. 2 is a diagram showing an example of the display of the indicator hand Y, in which the vertical axis represents the names of input/output signals and memory addresses, and the horizontal axis represents the time axis. Figure (a) shows the input/output signals MP, MC0I), MPIN, etc. that are exchanged with the machine tool.
MC0D and MPIN are the names of input/output signals, and these are, for example, key manual means Kl! (b) shows an example in which the contents of address 4B8.7010 of the internal memory are displayed.

The sampling time is displayed by a scale on the screen. Further, in this example, the states of input/output signals and the states of memory contents are displayed in bar graph format, but they can also be displayed in other formats.

Embodiment of the Invention FIG. 3 is a block diagram showing an example of the hardware configuration of an embodiment of the invention, in which 1 is a microprocessor;
is the bus, 3 is the ROM, 4 is the RAM, 5 is the magnetic bubble memory, 6 is the CRT, 7 is the keyboard, 8 is the data input device to which the input signal from the machine-side high-power control ink face is added, 9 is the machine-side high-power control A data output device that sends output data to the interface, 10 is a servo controller, 1
1 to 3 are X-axis, Y-axis, and Z-axis motors. In normal numerical control, the microprocessor 1 decodes the NC command program stored in the magnetic bubble memory 5 and controls the servo controller 10 according to the contents to control the motors 11 to 1.
Drive 3. Furthermore, input/output data is exchanged with the machine tool using images set in the RAM 4.

That is, a part of the RAM 4 stores an input signal image CI that stores the current value of the input signal input from the machine tool to the NC.
and an output signal image OI that stores the current value of the output signal output from the NC to the machine tool, and the data output is based on the bit in the output image OI that is assigned to the output signal to be output. The data output device 9 sends this to the machine tool in bytes at the same time as other signals, and the data is input by the data input device 8 in bytes. This is done by reading bit information of the written input image CI, which is well known in the art.

Now, the trace point information, sampling time information, and trigger information 5 display mode information inputted from the keyboard 7 are temporarily stored in a predetermined area of the RAM as shown in FIG. When trace start information is input from the keyboard 7, the microprocessor 1 executes the processing shown in FIGS. 5 and 6 in parallel with normal numerical control.

First, the microprocessor 1 executes the processing shown in FIG. 5 in the interrupt processing that is applied every 8 m5ec. That is, when an interrupt occurs, the contents of the interrupt number counter l are counted up by 1 (S1), and it is determined whether the contents of l have reached the sampling period N specified by the sampling time information (S2). Proceeding to step S3, the contents of the counter i are cleared to zero, and if not, the process returns. Therefore, for example, 24m5ec
Sampling time information N-
When 4 is specified, steps 83 to S5 are executed once for every four interrupts. Step S4 is
The data of the specified trace point is read and stored in the sampling data storage area S of RAM4 as shown in FIG.
Step S5 is a step of detecting whether or not a specific input/output signal specified by the trigger information and a change in memory contents have reached a specified state. Note that the detected information is temporarily stored in the RAM 4.

Furthermore, the microprocessor 1 creates display data for the CRT screen based on the sampling data stored in the RAM 4 at predetermined time intervals, and stores this in the display data area of the RAM 4.

FIG. 6 is a flowchart showing an example of display level processing, and this processing is executed at predetermined intervals. First, the microprocessor 1 determines whether or not trigger information is set in the RAM 4 (510), and if not, causes the CRT 6 to display the content stored in the display data area DPD of the RAM 4 (S12). Also, if trigger information is set, it is determined whether or not a trigger is detected (511), and if it is not detected, no display is performed.
If detected, the contents stored in the display data area DPD of the RAM 4 are displayed on the CRT 6. Therefore, if trigger information is not set, the CRT screen displays the ever-changing input/output signals and the history of memory contents; if trigger information is set, the input/output signals at the time the trigger is detected are displayed. signal.

The history of memory contents will be displayed. Therefore, when investigating other signals in relation to a certain signal, if you set the change in this certain signal as trigger information, the history of the specified input/output signal and memory contents at the time when this certain signal changed will be displayed. Therefore, if you want to view the history of input/output signals, etc., regardless of a certain signal, you do not need to set the trigger.

FIG. 7 is a diagram showing an example of a history chart of human output signals displayed on a CRT screen. In the figure, 70 is the outline of the CRT screen, and the X00 displayed on the left side of the CRT screen
3.3. Y2O2,3,F014.2. GO14,3,
X025.0.1?121.4. R121,5,X31
1.6 indicates the input/output signal name.

A thick line 71 drawn on the right side of each input/output signal name indicates the history of each input/output signal, and a thin line 72 indicates the reference level. Also, at the top of the screen you can see what the trigger information is.
G; Rendered as X121.3+11GH. Also, io SEC is the time width of the signal displayed on the screen, -800M5EC is the input/output signal X121.3 (7
) indicates that drawing starts -800M5EC before the rise (HIGH). Further, the sampling time is displayed as SAMPLING: 24 ms at the top of the screen, and a reference line indicating time every 2 dms is drawn in the vertical direction of the screen. Note that the display modes include single mode (SINGl), which draws the history only once when a single trigger point is detected; Repeat continue mode (C0NTINUE)
), and it is displayed at the top of the screen that the illustrated example is in single mode.

In addition to displaying the contents of the above-mentioned input signal image IC, output signal image OC, etc. in byte units as the memory contents subject to history drawing, it is also possible to draw the contents of other addresses in the RAM 4. .

As described in detail, according to the present invention, the history of signals input and output from a numerical control device to a machine tool and the history of memory contents can be displayed on a CRT screen, etc., so maintenance and troubleshooting can be easily performed. This makes it even easier and reduces downtime. Further, according to the present invention, since the sampling time of the history can be varied, the history of the input/output signal can be observed with a time width depending on the characteristics of the input/output signal, etc.
Furthermore, since you can set a trigger point for drawing, you can easily find the history you want to focus on.

[Brief explanation of drawings]

FIG. 1 is an explanatory diagram of the configuration of the present invention, FIG. 2 is a line diagram showing a display example, FIG. 3 is a block diagram showing an example of the bar 1-ware configuration of the embodiment of the present invention, and FIG. 4 is a RAM 4 Content explanatory diagram,
5 and 6 are flowcharts showing an example of the software configuration of the embodiment of the present invention, and FIG. 7 is a diagram showing an example of a CRT screen. 1 is the ``internal block'', 2 is the bus, 3 is the ROM
, 4 is RAM, 5 is magnetic bubble memory, 6 is CRT, 7
is a keyboard, 8 is a data input device, 9 is a data output device,
10 is a servo controller. Patent applicant Fanasoku Co., Ltd. Representative Patent Attorney Tamamushi Go 2 people outside the department - 45 = 461

Claims (1)

[Claims] In a numerical control device that decodes the contents of an NC command program and controls the motor of each axis via a surf controller and also exchanges necessary data with a machine tool, input/output signals or numerical values exchanged with the machine tool are used. Data reading means for sampling specified input/output signals or the contents of the memory from among the contents of the internal memory of the control device at specified time intervals, and data storage means for temporarily storing the data read by the data reading means. a trigger point detection means for detecting that a specified specific input/output signal or memory contents among the input/output signals or the contents of the internal memory of the numerical control device exhibits a specified change; Display information for displaying on a display a specified input/output signal or history of memory contents in the vicinity of a specified trigger point based on detection information of the point detection means and data stored in the data storage means. A numerical control device having an input/output signal and a memory content tracing function, characterized in that it is equipped with a display device that performs display based on the display data 1f data that is generated manually and the thigh data.