JPS6222430B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention provides test numbers stored in an electronic computer,
Alternatively, it relates to a relay contact switching test circuit checking method in which the configuration of a test circuit using contacts is sequentially switched by turning on (energizing) and off (opening) multiple relays according to the test number setting by the tester. .

A conventional relay contact switching test circuit checking method will be described with reference to FIGS. 1 and 2. In FIG. 1, reference numeral 1 denotes a computer or an operation panel having a test number setting function for the examiner. 2a-2h
are indicator lights such as light emitting diodes or lamps, and these indicator lights 2a to 2h are connected to the relay coil 3.
connected in parallel to a~3h, relay coils 3a~
It lights up when 3h is turned on (excited).

The relay coils 3a to 3h are relay coils for switching the configuration of the test circuit according to the test number setting by the computer or the tester. and,
4 is composed of relay contacts of relay coils 3a to 3h, and signals A, B, ...... corresponding to the test number are provided.
are connected to the measuring instrument or equipment under test O, P, Q,...

On the other hand, Fig. 2 is a diagram showing as an example which relay coil among the relay coils 3a to 3h is turned on (excited) corresponding to the test number. Indicates when the coil is on (excited).

In FIGS. 1 and 2, in the case of test number 1, relay coils 3a, 3b, and 3d operate.
Its operating state can be confirmed by indicator lights 2a, 2b, and 2d.

Similarly, in the case of test number 2, it can be confirmed using indicator lights 2a and 2c.

However, in this relay switching test circuit check method, during maintenance and inspection, it is necessary to check the operation indicator lights 2a to 2h of the relay coils 3a to 3h for each test number, and the more test items there are, the more time it takes. consumption, which is not desirable.

This invention was made in order to eliminate the above-mentioned drawbacks of the conventional technology, and it performs an AND operation on the contacts of a relay that operates in accordance with the test number, and feeds back the encoded result to a digital display or electronic computer, and then sends the result to the examiner's settings. A relay contact that can instantly determine whether or not the relay corresponding to the above test number is operating normally by checking the match with the test number and displaying the completed and incomplete test circuit configuration on two indicators. The object of the present invention is to provide a method for checking a switching test circuit.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the relay contact switching test circuit checking method of the present invention will be described below with reference to the drawings. FIG. 3 is a diagram showing a switching test circuit check device applied to one embodiment of the present invention.

In FIG. 3, the same or equivalent parts as in FIGS. 1 and 2 will be described with the same reference numerals. 1 in the figure is an operation panel similar to that in Figure 1, 5 is an encoder for encoding the test item number, and 6 is an encoder for encoding the test item number.
is a digital display for displaying the output of the encoder 5. Further, T is a power supply terminal.

Further, 3A to 3H indicate relay contacts, and one end of each of these contacts 3A to 3H is connected to a power terminal T.

The other end of contact 3A is the first input end of the 3-input AND circuit AND ₁ and the first input end of the 2-input AND circuit AND ₂ .
The other end of contact 3B is connected to the second input end of the AND circuit AND ₁ , the first input end of the 3-input AND circuit AND ₃ , and the 4-input AND circuit.
First input terminal of AND ₄ , 2-input AND circuit
Connected to the first input of AND ₅ .

The other end of the contact 3C is connected to the second input terminal of the AND circuit _AND2 , the fourth input terminal of the AND circuit _AND4 , and the second input terminal of the two-input AND circuit _AND6 .

The other end of contact 3D is connected to the third input terminal of AND circuit AND ₁ , the second input terminal of AND circuit AND ₃ , the third input terminal of AND circuit AND ₄ , and the second input terminal of AND circuit AND ₅ . It is connected.

The other end of the contact 3E is connected to the third input end of the AND circuit _AND3 , the second input end of the AND circuit _AND4 , and the first input end of the AND circuit _AND6 . The other end of contact 3F is connected to the third input end of AND circuit _AND5 .

Each output terminal of the AND circuits AND ₁ , AND ₂ , . . . is connected to the input terminal of the encoder 5.

Next, a method for checking a relay contact switching test circuit according to the present invention will be explained with reference to FIG.
In Fig. 3, the AND circuit AND ₁ takes the AND of relay contacts 3a, 3b, and 3d for test number 1 in Fig. 2, and the AND circuit AND ₂ takes the AND of contacts 3a and 3c for test number 2. , and the AND circuits AND ₃ to AND ₆ as well.

The outputs of these AND circuits _AND1 to _AND6 are encoded by an encoder 5, and the outputs are displayed on a digital display 6. For example, if the test number is 3, it will be displayed as 3.

In addition, the output of the encoder 5 is fed back to the computer 1 to check it with the commanded test number, and the relay operation corresponding to the test number is confirmed to be correct by displaying two indicators indicating whether the test circuit configuration is completed or not. Determine whether or not.

As described above, according to the relay contact switching test circuit check method of the present invention, the contacts of the relays operating corresponding to the test number are ANDed, and the encoded output is fed back to a digital display or computer. Since the completion and incompleteness of the test circuit configuration are displayed on two indicators, it is possible to instantly switch the relay and check the operation of the test circuit. Therefore, maintenance of the equipment is greatly reduced.

[Brief explanation of the drawing]

Figure 1 is a block diagram of a switching test circuit applied to the conventional relay contact switching test circuit check method, and Figure 2 shows the operating status of the relay corresponding to the test number in the same relay contact switching test circuit check method. 3 are block diagrams showing an embodiment of a switching test circuit checking device applied to the relay contact switching test circuit checking method of the present invention. 1...Operation panel, 5...Encoder, 6...Digital display, 3A~3H...Contact, AND ₁ ~
AND ₈ ……AND circuit. Note that the same reference numerals in the figures indicate the same or equivalent parts.

Claims (1)

[Claims] 1 In a test device that sequentially switches the configuration of a test circuit using contacts by energizing and opening multiple relays in accordance with the test number stored in the computer or the test number setting by the tester, the test number corresponds to the above test number. The encoded data is fed back to a digital display or computer, and the test circuit is configured by matching the test number set by the tester. completion of
A relay contact switching test circuit check method characterized by displaying on two incomplete indicators.