JPH0159690B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a relay test method for a switching device that can perform tests by sequentially and repeatedly operating a large number of relays.

Totalizer systems, etc., which aggregate data from multiple terminals in remote locations to a control unit (TCU: Totalizer Control Unit) via a modem line, are equipped with a communication processing unit to connect the control unit and terminals. Perform the join.
In this case, generally a plurality of systems are connected to the control device, a corresponding plurality of communication processing devices are provided, and one additional system is provided as a standby communication processing device for switching and use in the event of a failure. In order to switch to a standby device, the communication processing device is equipped with a switching device to switch between the low-speed input/output interface and various interfaces. Since such switching devices are relatively slow, relay circuits are mainly used to perform the required switching.

Switching devices using such relays often fail due to poor contact at the relay contacts, etc., but as a countermeasure to this, conventionally, each relay was inspected and replaced individually on a regular basis. Otherwise, methods such as carrying out repairs from time to time have been resorted to.

The present invention attempts to propose a new relay test method for the relay section of a switching device that switches the interface of a communication processing device. To provide a relay test method that automatically operates a large number of switching relays in a fixed order to easily check the operation of the relays.

Hereinafter, the present invention will be described in detail with reference to Examples.

FIG. 1 shows the configuration of an embodiment of the relay test method of the present invention. In the figure, SW1 is a relay test start switch, SW2 is an automatic/manual switching mode setting switch, SW3 and SW4 are manual changeover switches, TST is a test start relay, A, B,
T1, T2 are test control relays, EX is a switching relay, EA0, EA8, EB0 are control relays, EA1
~EA7, EB1~EB7 are line switching relays. In addition, the contacts of each of these relays are represented by lowercase letters with the same symbols as the relays. Among these, line switching relays EA1 to EA7 and EB1 to
The EB7 is a relay that belongs to a switching device that is to perform a relay test and actually switches lines, and each has a large number of contacts (not shown) for switching lines. Also, relay A,
B, T1, T2, TST and switch SW1 constitute a relay test circuit, and switch SW1 is a non-lock switch.

Further, FIG. 2 shows the operation of the start switch SW1 and each relay when performing a relay test in the embodiment of FIG. 1. The operation of the relay test method of the present invention will be described below with reference to FIGS. 1 and 2.

When performing a relay test, first switch SW1
When turned on, this operates relay TST, which in turn operates relay A via contact _tst1 , and self-holds through contact _a1 . When switch SW1 is turned off, relay TST is restored, thereby operating relay B via contacts tst ₁ and a ₂ , and contact b ₁
maintain oneself by At this time, relay A is a contact
Self-maintained by tst ₂ and a ₁ .

The operation of relay B operates relay T1 via contact _b2 , which in turn operates relay EA0 via contact t1. The operation of relay EA0 causes relays EA1 to EA7 to operate via contact ea0, and the operation of relay EA7 causes contacts ea7 and _b3 to operate.
Relay EA8 operates via. The operation of relay EA8 causes relay EB0 to operate via contact ea8 and switch SW4, which causes relays EB1 to EB7 to operate via contact eb0. Relay EB
7, relay T2 is activated via contact eb7.
is operated, thereby restoring relay T1 via contact t2.

When relay T1 is restored, relay EA0 is restored via contact t1, and therefore relays EA1 to EA7 are restored by restoration of contact ea0. Relay EA7
Due to the restoration of , relay EA8 is restored via contact ea7, and therefore relay EB0 is restored via contact ea8. Contact eb0 is restored by relay EB0.
is restored, and therefore relays EB1 to EB7 are restored. When relay EB7 is restored, relay T2 is restored, and therefore relay T1 is operated again via contact t2.

The operation of relay T1 causes each relay to operate again in the same order as before, and finally the operation of relay T2 causes relay T1 to recover, and each relay to recover in sequence. In the same manner, each relay sequentially operates and recovers in the same order.

Next, when switch SW1 is turned on again, relay TST operates and relay A is restored via contact _tst2 . When switch SW1 is turned off, the relay
TST is restored and therefore relay B via contact tst ₁
will be restored. When relay B is restored, relays T1 and T2 are restored via contact _b2 , and therefore all other relays EA0, EA1-7, EB0, EB1-7 are also restored, and the relay test ends.

In this way, according to the relay test method shown in Figure 1, by simply pressing switch SW1 once, line switching relays EA1 to 7 and EB1 to 7 are turned on and off in sequence, operating in sequence. The relay test can be completed by simply pressing switch SW1 again. The operation of each relay in this case will become clearer by comparing the above explanation with the time chart shown in FIG. 2.

In FIG. 1, by placing switch SW2 in the illustrated position and driving relay EX from an external circuit (not illustrated) via relay driver DV, relay EA0 operates via contact ex.
This causes relays EA1 to EA7 to operate. In this way, the illustrated position of switch SW2 is the automatic position, and thereby the circuit switching relay EA
Relay tests can be performed by operating 1 to EA7 from an external circuit.

Furthermore, when the switch SW2 is switched to the side opposite to that shown in the figure, the relay EX can be operated by pressing the switch SW3. Relay EX
By the operation of , relay EA0 is operated via contact ex, and by the operation of relay EA0, relays EA1 to EA7 can be manually switched in the same way as in the automatic case to perform a relay test. Furthermore, by pressing the non-operating switch SW4 of relay EA8, relay EB0 can be operated, and relays EB1 to EB can be operated via contact eb0.
7 can be operated. In this way,
Relay tests can be performed by manually switching relays EB1 to EB7.

As explained above, according to the relay test method of the switching device of the present invention, by providing the relay test circuit, a large number of switching relays in the relay section of the switching device can be operated next by simply pressing the start switch. By automatically turning on and off repeatedly in a certain order until the start switch is pressed again, the operation of the relay can be easily checked, which is extremely effective.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the configuration of an embodiment of a relay test method for a switching device according to the present invention, and FIG. 2 is a time chart showing the operation of each relay in the embodiment of FIG. SW1~SW4...Switch, A, B, T1, T
2, EX, EA0, EA1~8, EB0, EB1~7
...Relay, a ₁ , a ₂ , b ₁ , b ₂ , b ₃ , t1, t2,
ex, ea0, ea7, ea8, eb0, eb7...Contact, DV
...Relay driver.

Claims (1)

[Claims] 1. A first relay that turns on and off depending on whether the starting switch is turned on or off, and a second relay that turns on or off alternately each time the first relay is turned on. , a third relay that is turned on when the second relay is on and the first relay is turned off and turned off when the second relay is off and the first relay is turned off; and when the third relay is on, the fifth relay
a fourth relay that is turned on when the third relay is turned off and turns on any number of relays under test;
a fifth relay that is turned on and turns off the fourth relay when the activation switch is turned on, and a fifth relay that is turned on and turns off the fourth relay when the activation switch is turned on; A relay test method for switching devices characterized by operating several relays under test by repeatedly turning them on and off alternately.