JPH02218919A - Displaying method of module under test - Google Patents

Abstract

PURPOSE:To make it possible to control the time effectively by using a display means such as graphic display for a plurality of modules under test at the start of the test and the during the test. CONSTITUTION:When modules under test 4-1, 4-2... and a processing program are determined and the test is started, the test program is read out through a means 7 for displaying the total number of the modules. As a result, the total number of the modules can be displayed on a display device 2 which displays the test result. Then the test program is operated with a processor 1, and the modules are sequentially tested. The test program performs the test for the modules. The data of the result are transmitted to the processor 1 wherein judgment is performed. Colors are changed for the good products and the defective products of the modules whose tests are finished with an individual display means 9 based on the test result, and only the applicable modules are displayed. When the colors are changed in this way, the modules whose tests are finished, the untested modules and the pass or fail of the tested modules can be discriminated only by observing the device 2.

Description

[Detailed Description of the Invention] [Summary] The present invention relates to a method for displaying the status of a module when testing the electrical characteristics of a plurality of modules under test using a probe, etc. , the purpose is to provide a display method that allows for effective time management using display means such as graph ink display at the start and during the test, and to display the electrical characteristics of multiple modules under test. A method for displaying the status of each test module by the program processing, comprising a processor controlled by a program for individually testing and a display device for displaying test results, wherein the processor has a target for the necessary test. means for displaying the modules at the start of the test for all the modules to be tested; means for changing the display only for the next module to be tested; and means for individually displaying the tested modules only. The method consists of sequentially executing tests on the module under test and displaying the results.

[Industrial Application Field] The present invention relates to a method of displaying the status of a plurality of modules under test when testing the electrical characteristics of the modules using a probe or the like.

Conventionally, a plurality of modules under test, such as integrated circuits mounted on a printed circuit board, have been electrically tested by blowing using a processor. then,
Although displaying the elapsed time from the start of the exam has been implemented, since there are multiple modules and test items, it was difficult to grasp the remaining time compared to the required exam time. Therefore, it was necessary to develop a technology that could determine the remaining time for the exam.

[Prior Art] As shown in FIG. 4, it is known to perform electrical tests on a plurality of modules under test, such as integrated circuits mounted on a printed circuit board, and to display the results. In FIG. 4, ■ is a central processing unit (processor), 2 is a graphic display device, 3 is a mechanism control unit such as a probe, 4-1, 42, - are a plurality of modules under test, 5
is a printed circuit board, 6 is a probe, 7-1, 7-2・-
indicates probe bin. The pins of the probes 6 are individually brought into contact with the modules under test 4-1, 4-2-, mounted on the printed circuit board 5. The mechanism control section 3 tests the modules according to a predetermined order. For example, the voltage of each part is measured when a DC voltage is applied, and then the voltage of each part is measured when a minute amplitude AC voltage is applied, and the results are transmitted to the central processing unit 1 each time. The central processing unit 1 determines whether the module is good or bad based on the result data, and individually displays the module in green on the display W2 when it is good and in red when it is defective. Next, the probe 6 is moved to another module for testing and judgment, and the status of that module is displayed replacing the above display. Displaying the elapsed time since the start of the test can be done using a simple timer.

[Problems to be Solved by the Invention] When modules to be tested are mounted on a printed circuit board, the number of modules is not constant and is determined by the type of printed circuit board. Furthermore, even if the printed circuit board is similar, the configuration and number of modules installed may be changed. Therefore, the required test time is not constant depending on the module test item, and even if the number of modules on the printed circuit board is the same, the required test time will be longer or shorter. Therefore, even if you know the elapsed time from the start of the exam, you will not know the end time or the remaining exam time. The time required for this can only be estimated by relying on the operator's intuition or by manually examining the module test program in detail. For this reason,
You may be delayed in preparing for your next exam, or you may find it difficult to concentrate on other tasks.

SUMMARY OF THE INVENTION An object of the present invention is to improve the above-mentioned drawbacks and to effectively manage time for multiple modules under test by using display means such as graphic displays at the start and during the test. Our goal is to provide the following.

[Means for Solving the Problems] FIG. 1 is a diagram showing the basic configuration of the present invention. In FIG. 1, l is a processor, 2 is a display device for displaying test results, 4-1.4-2- is a module to be tested, 7 is means for displaying the total number of modules, and 8 is a module to be tested next. Display changing means 9 indicates means for individually displaying tested modules.

It comprises a processor 1 controlled by a program for individually testing the electrical characteristics of a plurality of modules under test 4-1, 4-2-, and a display device 2 for displaying test results, and the program processing Each module under test 4-
In the method of displaying the status of L4-2-, the present invention has the following configuration. That is, the processor includes means 7 for displaying all the modules to be tested at the start of the test, means 8 for changing the display only for the module to be tested next, and tested modules. means 9 for performing the individual display only for said means ? , 8. ．． 9 to sequentially execute tests on the modules under test and display the results.

[Operation] When the processing program for the modules to be tested 4-1, 4-2, . . . is determined and a test is started, the test program is read out by means 7 for displaying the total number of modules. As a result, a display for all the modules can be displayed on the display device 2 that displays the test results. At this time, it is easier to see by using a screen whose display arrangement corresponds to the module arrangement, and by coloring it in light blue, for example, to correspond to the module location. Next, a test program is run by the processor (central processing unit) 1 to sequentially test the modules. For the module to be tested first, the processor operates the means 8 for changing the display of light blue to change it from light blue to, for example, yellow. The test program tests the module and the resulting data is transmitted to the processor 1 for judgment. Regarding the test results, the ``tested module individual display means 9'' displays only the module in question by changing the color depending on whether it is a good product or a defective product. For example, when the product is in good condition, yellow is changed to green. Next, the mosier to be tested is changed from light blue to yellow, for example. By changing the colors in this manner, the number of tested and untested modules can be determined by color-coding by simply looking at the display device 2, and the quality of the tested modules can also be immediately determined. This display is performed in real time. Since the program initially sets and displays a predetermined number of modules, the displayed number will of course not be changed until all tests have passed.

[Example] FIG. 2 shows an operational flowchart for the present invention.

In FIG. 2, in step (2) after the start of processing, the test program is read and all test target modules are colored light blue. Next, in step (3), the next module to be tested is obtained from the test program. In step (2), it is determined whether the test is finished. If it is finished, proceed to step ■; otherwise, proceed to step ■ and finish. In step (2), the next module to be tested is colored yellow. Then proceed to step ■,
1 module is tested. Next, in step (2), measured values are obtained. In step (3), it is determined whether the module is good or bad. If step 7 is determined to be good, proceed to step [phase], and if it is defective, proceed to step ■. In step [phase], the corresponding module is colored green. Further, in step (2), the corresponding module is colored red. Then, when step [phase] or step ■ is completed, the process proceeds to step ■ and the process is repeated.

FIG. 3 is a diagram showing an example of the screen of the display device 3 that displays the test results. In Fig. 3, IO is the screen of a display device such as a CRT, 1) is a section showing the state when 64 modules under test are mounted on a printed circuit board, etc., and a small section with modules to be tested is shown, for example. Display in light blue. Due to the wiring circuit of the printed circuit board, even if the module is mounted on the board, the test program at that time may not perform the test process. The colored display is valid.

In addition, if something determined to be defective in the initial module test process can be easily dealt with, such as a soldering defect, a "retry test" may be conducted after that process. It is effective to apply the present invention to. That is, a processing program is included that selects only defective modules in the initial test as modules to be tested. Next, the retry test program starts operating in the same way as a normal test program. Therefore, for example, a module displayed in light blue will be re-displayed in green or red upon retesting. It can be seen that what is displayed in red here is not a simple defect such as a soldering defect, but a major problem.

Although the above explanation was about testing a module mounted on a printed circuit board, the present invention is not limited to this, and the present invention is not limited to testing a module that exists alone within the frame of a compartment or is directly incorporated into a casing. can also be applied in the same way.

[Effects of the Invention] Thus, according to the present invention, the total number of modules to be tested at the start of the test and the number of remaining modules to be tested during the test can be clearly seen with just a glance at the display device. You can easily understand the total exam time and remaining exam time. Therefore, even when testing a large number of modules that takes several hours, it can greatly contribute to improving the operating efficiency of the testing equipment and the work efficiency of the operator.

・-Individual display means

Claims (1)

[Claims] A processor (1) controlled by a program for individually testing the electrical characteristics of a plurality of modules under test (4-1), (4-2), and displaying test results. a display device (2), the method for displaying the status of each module under test (4-1) (4-2)... by the program processing, wherein the processor (1) includes a necessary test target; means (7) for displaying the entire number of modules at the start of the test; means (8) for changing the display only for the next module to be tested; and the individual display only for the tested modules. A method for displaying a module under test, comprising: means (9) for performing the following: sequentially executing tests on the module under test using the means (7), (8), and (9) and displaying the results.