JPS6082036A - Multiple operation detector of selective controller - Google Patents

Abstract

(57) [Abstract] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a multiple operation recovery circuit for detecting overlapping operations of selection switches or relay contacts in a selection control device, and particularly relates to improving reliability. be.

[Background of the invention]

Conventionally, when controlling a large number of devices to be controlled, in order to facilitate monitoring and control, a selection switch was provided for each device, and one device was selected using the selection switch, and a common control was applied to those devices. Control is generally performed using a master switch provided as a controller. Since it is a condition that only one selection switch is operating at the same time, selection auxiliary relays, etc. (il-) are provided corresponding to those selection switches, and the contacts are combined to interlock. I try to take it.

Conventionally, as an example of such a selection control device, the
The one described in Publication No. 3-3805 is widely used,
In addition, when selecting and controlling multiple devices to be controlled by dividing them into multiple groups,
The structure described in the official gazette is known.

The latter method will be explained using FIGS. 1 and 2.

As shown in FIG. 1, the control target 1 of the selected control device includes a plurality of control target devices 2 (2r, 2□).

..., 2. ), and each controlled device 2 has one or more controlled devices 3 (31332+...).

31). The selective control device selectively controls the only controlled device 2 in the controlled object 1, and must avoid sending control commands to two or more controlled devices 2 in the same time period. Therefore, as shown in FIG. 2, a multiplex operation detection circuit 4 (41+
42...

44), so that when a control command is erroneously given to a plurality of controlled target devices 3 or controlled target devices 2, it is immediately detected. What is shown in FIG. 2 is an example of a multiple operation detection device of a selection control device that selects any one of the control target devices 3 shown in FIG. It is provided in correspondence with the device 3. In the figure, a normally open contact (hereinafter referred to as a contact) 5
as+5a2 and normally closed contact (hereinafter referred to as contact) 5b
are the a contact and the b contact, respectively, of the selection auxiliary relay 5, which are excited when the controlled device 3 is in the selected state. One end of the a contact 5al of each multiplex operation detection circuit 4 is connected to the power supply line 6, and the other end is connected to the a contact 58g via the b contact 5b. A contact 5aX and B contact 5b
The connection point is connected to the connection point between the B contact 5b and the A contact 5a3 of the adjacent multiplex operation detection circuit 4 via a wiring plug 7. Similarly, the other end of the a-contact 5a2 is connected to the a-contact 5a2 of the adjacent multiplex operation detection circuit 4 via a wiring plug 8. Final stage multiple operation detection circuit 4. A contact 5
A connection point between a1 and b contact 5b is connected to another power line 10 via a detection relay 9A. One end of the a contact 5a2 of each multiplex operation detection circuit 4 connected by the wiring plug 8 is connected to the power supply ml OK via the detection relay 9B.

A contact 9Aa of each of detection relays 9A and 9B.

9Ba is outputted to the outside as a detection signal. Because of this configuration, when any one or more controlled device 3 is selected, one of the a contacts 5al
1 or more are closed, thereby energizing the detection relay 9A. On the other hand, two or more controlled devices 3 are selected, and 2
When more than one a contact 5a2 is closed, the detection relay 9B is energized. Therefore, when only the detection relay 9A is energized, it is assumed that normal operation has been performed and only the signal from the a contact 9Aa is output. Further, when the detection relay 9B is excited, it is assumed that a malfunction has occurred and the signal of the a contact 9Ba is output as a multiple operation detection signal.

However, in the case shown in FIG. 2, if there is a welding defect in the a-contacts 5al, 5ag, or b-contacts 5b of the selection auxiliary relay, the state B of normal or multiple operation cannot be correctly detected. In addition, even if the wiring of the wiring plugs 7, 8 is disconnected or there is a poor connection of the plugs, there is a drawback that normal multiplex operation cannot be detected.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a multiple operation detection device for a selection control device that can prevent erroneous detection due to poor contact or poor wiring of a selection auxiliary relay, etc., and improve reliability.

[Summary of the invention]

The present invention provides a selection auxiliary relay that operates in response to the selected state of one of the devices or device groups for each device to be controlled or for each group of devices to be controlled, and when one of the devices or the device group The first and second contacts of the selection auxiliary relay, which are opened when selected, are connected in series in the same order, respectively.
energize the detection relay, and when one of the equipment or equipment group is selected between the anti-detection side terminal of the first contact and the detection relay side terminal of the second contact of each of the same selection auxiliary relays. By connecting the third contact of the selection auxiliary relay, which is closed to the This is intended to prevent false detection and improve the reliability of multiple operation detection.

[Embodiments of the invention]

The present invention will be explained below based on the embodiment shown in FIGS. 3 and 4. In these figures, parts having the same functions and configurations as those of the conventional example shown in FIG.

In FIG. 3, the multiple operation detection circuit 11 (111°11
2,...,11. ) are provided corresponding to the control target devices 3 (31, 32, . . . , 31), which are not shown. Furthermore, the selection auxiliary relay 5 (not shown) is energized when the controlled device is selected, and the b contacts 5b1, 5b2 of the selection auxiliary relay 5 are activated when the corresponding controlled device 3 is selected. The first contact and the second contact are those which are opened when the contact is made. Furthermore, the a contact 5a of the selection auxiliary relay 5
constitutes the third contact which is closed when the corresponding controlled device is selected. B contact 5b of each multiplex operation detection circuit 111-11a, and B contact 5bz
are connected in series and connected to the power supply line 6.10 via the first detection relay 12 and the second detection relay 13, respectively. The a contact 5a is connected between the opposite terminal of the b contact 5b1 of the selection auxiliary relay 5 on the detection relay side and the detection relay side terminal of the b contact 5bz. The multiple operation detection signal 15 is sent to the b contact 13b1 of the second detection relay 13,
The normal operation signal 16 is a series contact signal with the A contact 14a1 that is closed when the electric signal Fi, i6.10 is excited. 13 a contact 13a1 and power supply wires 6, 10
This is a series contact signal with the a contact 14a2, which is closed when the a contact 14a2 is excited.

Because of this configuration, the first and second detection relays 12 and 13 are always energized, and the first detection relay 12 is activated when any one or more selection auxiliary relays 5 operate. Similarly, the second detection relay 13 is de-energized when two or more selection auxiliary relays 5 operate. Therefore, multiple operation detection signal 1
5, a signal is output when the power supply lines 6 and 10 are excited and when two or more selection auxiliary relays 5 are operated. Further, the normal operation signal 16 is output when the power lines 6 and 10 are excited and only one selection auxiliary relay 5 is operated. That is, a signal is output on condition that two or more contacts 13a1 that are not operating are closed, and one or more contacts 12bl that are operating are closed. Further, a multiple operation detection signal 15 is output in response to a contact failure of the selection auxiliary relay 5, a disconnection of the wiring plug 7.8, or a contact failure.

In this way, according to this embodiment, faulty contact of the selection auxiliary relay, disconnection or faulty contact of the wiring plug, etc., are detected as multiple operations, so that multiple control objects may be mistakenly detected. It is possible to prevent malfunctions caused by controlling equipment.

In other words, reliability is improved since the system is operated in a fail-safe manner.

In the embodiment shown in FIG. 3, the conditions for the multiplex operation and normal operation detection signals 15.16 include that the power supply line 6.10 is excited, but these detection signals 15.16 are used. Needless to say, this is not necessary when the control circuits are excited by the same power supply lines 6 and 10.

The embodiment shown in FIG. 4 has a plurality of controlled devices 2 (21*22
+..., 21) shows the configuration of a multiple operation detection device for detecting multiple operations. As shown in the figure, multiple operation detection circuit 17 (17r).

172,...,17. ) are each controlled device 2
It is set up to correspond to. Each contact constituting the multiple operation detection circuit 17 is an a contact or a b contact of the first and second detection relays 12, 13 shown in FIG. FIG. 3 First and second detection relays 12.1 in the illustrated embodiment
Those corresponding to 3 are detection relays 18 and 19. The multiplex operation detection signal 20 and the normal operation detection signal 21 have a similar configuration.

The operation of the embodiment constructed in this way is similar to the embodiment shown in FIG. 3, and the same effects can be obtained.

Needless to say, in the embodiment shown in FIG. 4, the contact 12b2 is closed when one or more selection auxiliary relays operate, and the contact 13a2 is closed when zero or one selection auxiliary relay is operated. These series signals become signals that are closed when only one selection auxiliary relay operates, and serve as a signal for contact 5a in the embodiment shown in FIG.

〔Effect of the invention〕

As explained above, according to the present invention, false detections caused by poor contact of the selection auxiliary relay, disconnection or poor contact of the wiring plug, etc. can be prevented, and the reliability of multiple operation detection can be improved. It has the effect of being able to

[Brief explanation of the drawing]

Fig. 1 is a block diagram of a controlled object to which the present invention can be applied, Fig. 2 is a block diagram of a conventional example, Fig. 3 is a block diagram of an embodiment of the present invention, and Fig. 4 is a block diagram of a control object other than the present invention. It is a block diagram of an Example. 2... Controlled device (controlled device group), 3... Controlled device, 5... Selection auxiliary relay, 12.18...
・First detection relay, 13.19... Second detection relay, 15.20... Multiple operation detection signal, 16.21.
・4 sides of true shell

Claims (1)

[Claims] 1. In a multiple operation detection device of a selection control device that selectively monitors and controls a plurality of devices to be controlled, one of the devices or groups of devices is provided corresponding to each device to be controlled or each group of devices to be controlled. A selection auxiliary relay that operates in response to the selection state of one device is provided, and the first and second contacts of the selection auxiliary relay, which are opened when one of the devices or a group of devices is selected, are sequentially connected in the same order. Connect in series,
The first and second detection relays are energized through the series contact circuit, respectively, and between the anti-detection relay side terminal of the first contact and the detection relay side terminal of the second contact of each of the same selection auxiliary relays. The third contact of the selection auxiliary relay, which is closed when one of the equipment or equipment group is selected, is connected, and the normally closed contact of the second detection relay is used as a multiple operation detection signal. Features "Multiple operation detection of selection control device" Ω position.