JPS62121514A - Diagnostic system for numerical controller - Google Patents

Abstract

PURPOSE:To easily know the cause of abnormality by providing diagnostic functions which take a factor analysis of a selected diagnostic item and display the result by a diagnostic result display processing means as detailed comments on individual factor units. CONSTITUTION:A diagnostic information table 2 corresponding to a specified diagnostic item number 1 is extracted based on the specified diagnostic item number 1 and after an index register is initialized, the data address and pit position where the 1st decision condition is stored are read out to read out memory information indicated by the data address, thereby making a decision 3 on whether condition is satisfied or not. When not, the index is stored in a memory and an end decision is made after the index is counted up. Lastly, a message for diagnostic result display is outputted to a display device such as a CRT by diagnostic result display processing 4 on the basis of the contents of a generated value (m) (number of unsatisfied conditions) and Mn (unsatisfied index No.). Consequently, a fault is found accurately and speedily and known in detail and the time required for repair is shortened greatly.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to a diagnostic method for a numerical control device (hereinafter abbreviated as an NC device) having a trouble self-diagnosis function.

[Conventional technology]

In general, the diagnostic function of conventional NC devices is such that when an abnormality such as a failure occurs within the NC device or on the machine side, an error warning is issued by displaying a rank, etc., or an alarm message is displayed on a CRT. In addition, in order to know whether the various signals connecting the machine side and the NC device are connected correctly, we have installed a system that allows these signals to be viewed at a glance on a monitor.
exist.

Fig. 7 is an external view of the diagnostic function of a conventional device of this type, showing an example of displaying alarm messages on a CRT, and Fig. 8 shows an example of displaying alarm signals.
FIG. 3 is an external view showing a display example of the jNC device. In the figure,
10 is an example in which an alarm 1iyfr of the diagnosis result is displayed on a CRT.

Next, the operation will be explained. First, in the example shown in FIG. 7, two alarms are currently occurring, and the displayed contents indicate that the main shaft is overheating and that the X-axis is at the stroke end. Furthermore, Fig. 8 shows an example of a display when the input/output signals of the NC device are being monitored, and each input/output signal mapped on the memory is represented by "l" and "0'" to indicate which input/output signal is being monitored. This is a table that allows you to check whether the output signal is ONI.However, in this case, you will need a mapping diagram for each signal, and the mapping diagram will tell you which bit of which address corresponds to what input/output signal. This is something I understand for the first time.

[Problem that the invention seeks to solve]

Since the diagnosis method of conventional numerical control equipment is configured as described above, the purpose of the diagnostic function is not to help the user find the cause of an abnormality, but to help the user (operator) to understand the occurrence of an abnormality and the symptoms of an abnormality. Even if the problem is caused by a trivial cause, you should seek professional diagnosis.

During this period, there were problems such as the need to stop the machine, which hindered efforts to improve operating rates.

This invention was made in order to solve the above problems, and allows the user to easily understand the cause of an abnormality, as well as to reduce the wasted time spent repairing the abnormality. The purpose is to obtain a diagnostic method for the device.

[Means for solving problems]

The NC device according to the present invention has several diagnostic programs prepared in advance and explanatory texts of diagnostic items corresponding to the diagnostic programs, so that the symptoms currently encountered due to a failure match the contents of the explanatory texts. If the explanatory text is selected, the corresponding diagnostic program is started and a comment text of the diagnosis result is displayed.

[For production]

The diagnostic function of the present invention is designed to teach the main cause of a specific symptom in detail. Therefore, it is possible for the user to repair the failed fe by himself, and the repair time is shortened.

[Metal practice]

An embodiment of the present invention will be described below with reference to the drawings. 1st
The figure is a processing block diagram of the diagnostic processing program built into the NC device. A diagnostic item selection process that allows an operator to select a necessary item from the explanations of the diagnostic items.

3 is a diagnostic process for diagnosing the selected diagnostic item;
4 is a diagnosis result display process for displaying the diagnosis results.

Next, the operation will be explained. First, Fig. 2 (A) is a diagnostic item table containing the explanatory text 'tt of the diagnostic item used in the diagnostic item display process 1 of Fig. 1, and a simple explanatory text is written as a character string for each diagnosis item score. Register it. When the diagnostic screen is selected, the registered character string is output to a display device such as a CRT.

In addition, Fig. 2 (BJ is the exterior view when outputting to the character string t-display device. In this case, the operator searches for the necessary item explanation on the CRT, and if there is a corresponding item, the item number is input using a keyboard, etc. The input information is checked by the diagnostic item selection process 2 in Figure 1, and if there is a corresponding number among the registered diagnostic item descriptions, the diagnostic process 3 in Figure 1 is executed. do.

FIG. 3 (-) and FIG. 3(B) are block diagrams and flowcharts respectively showing a certain process, tentatively called process 131, in which the process is started by input condition determination process 32, and any If even one of the conditions is not satisfied, the process 131 is not executed.
As shown in FIG. 4, the diagnostic processing for 1 includes the required number of diagnostic conditions 42 (corresponding to conditions A and E in the example in FIG. 3) provided for each diagnostic item number 41, and the data address for each diagnostic condition. 43, bit position 441 Based on the diagnostic information table in which detailed data such as message 45 for displaying diagnostic results is registered, check whether each condition is satisfied or not, and record conditions that are not satisfied. When all checks are completed, the process proceeds to the next diagnostic result display process.

The flow of the above diagnostic processing is shown in a flowchart.

Figure 5 shows this. That is, after extracting the corresponding diagnostic information table based on the specified diagnostic item number 51 and initializing the index register 52, the data address and bit position where the first judgment condition (i = 1) is stored are extracted. is read out (53), and the memory information indicated by the data address is read out (541), and it is determined in determination (55) whether the condition is satisfied or not. If it is not established, the index number (i) is stored in the memory Mm (56), the index is counted up (57), and then an end determination is made at @decision (58).

Finally, the display processing of the diagnosis results is performed at step 56 in Figure 5.
Based on the value of (the number of conditions that are not met) and the contents of Mm (the number of conditions that are not met), a message 45 for displaying the diagnosis result in the diagnosis table of FIG. 4 is output to a display device such as a CRT.

That is, assuming that the operator selects diagnosis item No. 41 (1) in FIG. 4, if conditions A and B do not hold, a comment like the one shown in FIG. 6 will be displayed on the CRT as a diagnosis result. Displayed and output. That is, in the above example, two main causes are shown as the diagnosis result for the phenomenon that "autonomous driving cannot be started." One is that "the mode is not selected," and the other is that "the start switch is turned on." The reason for this is that they have not done so.

In the above example, the diagnosis item table (Fig. 2 (A)) and the diagnosis information table (Fig. 4) were explained as being fixed, but the configuration is such that it is possible to add 1F by using other data input means. If this is done, it is also possible to gradually increase the number of diagnostic items.

〔Effect of the invention〕

As described above, according to the present invention, a diagnostic program is prepared in advance so that cause diagnosis for equipment-related phenomena and troubles can be executed in an interactive manner with a CRT, and symptoms can be investigated using explanatory text. Accurate and fast discovery
Moreover, it is possible to know the details in detail, which has the effect of significantly saving the time required for repair. It also has the advantage of being usable for product testing, etc.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a processing procedure according to an embodiment of the present invention, FIG. 2 (, k) is a diagram of a diagnostic item table used in the diagnostic item display process, and FIG. External view shown in Figure 3 (Al, (Bl is a general 1
Fig. 4 is a diagram of the diagnostic information table used in the diagnostic processing, Fig. 5 is a flowchart showing the diagnostic processing, Fig. 6 is an external view showing the diagnostic results, Fig. 7 and Fig. FIG. 8 is an external view showing a conventional diagnostic function. In the figure, 1 is a diagnostic item display process, 2 is a diagnostic item selection process, 3 is a diagnostic process, and 4 is a diagnostic result display process. Patent applicant Mitsubishi'RL Iso Co., Ltd. Agent Patent attorney 1) Hiroshi Sawa (2 others) Figure 1 Figure 2 (A) Figure 2 (B) Figure 5 Procedural amendment (voluntary) Sai! 1 Director-General's Palace 1, Display of 12 cases Patent Application No. 1982-262862 2, Title of invention Diagnosis method for numerical control device 3, Person making amendment Representative: Late Mamoru Shiki 4, Agent Postal code: 105 address
5, 1-4-10 Nishi-Shinbashi, Minato-ku, Tokyo, Subject of amendment 6, Contents of amendment (1) The specification is amended as follows. Figure S (A)

Claims (1)

[Claims] A plurality of diagnostic programs prepared in advance are displayed by a diagnostic item display processing means, a necessary item is selected from the several displayed diagnostic items by a diagnostic item selection processing means, and the selected item is selected. Numerical control equipped with a diagnostic function that causes a diagnostic processing means to perform a factor analysis on the diagnosed diagnostic items, and processes the results of the diagnostic processing as detailed comments for each factor by a diagnostic result display processing means. Equipment diagnostic method.