JPS5818838B2 - Nijiyusentakudosakenshiyutsuhoshiki - Google Patents

Description

[Detailed Description of the Invention] There is a monitoring and control device in the center, and each site receives control from the center to control the actual load input.

In a remote control system where there is a receiver that disconnects, connecting the communication line between the center and the receiver with as few wires as possible will reduce wiring material costs and construction costs, which will have a major benefit as a system. be born

As a method to reduce the number of communication lines, each receiver is wired with more than 10 common lines consisting of an address line, a control line, and a 2-volt operation detection line in parallel, and the load to be controlled is first selected from the center. For example, on the receiver side, the corresponding receiver is addressed, and then "on or off" control is performed.

In this case, the control signal is sent in parallel to all receivers, but is ANDed with the addressed condition to control the "on" or "off" of only that circuit or the load.

In the case of a system in which the number of wiring lines is minimized in this way, if one of the N lines is not addressed but two or more are addressed, the load will be erroneously controlled.

The present invention provides a system that has a simple configuration and a small number of wires, detects when 2.0 or more addresses are addressed, and prevents such erroneous control from being performed.

An embodiment of the method of the present invention will be described below with reference to the drawings.

FIG. 1 shows a remote control system equipped with a dual selection operation detection circuit, in which 1 is a central control unit, 2 is a plurality of (n) terminal transmitters, and 3 is a communication line.

In each of the terminal receivers 2, 4 is an address control circuit;
5 is a control relay circuit, Xl, X2... are the above;
A relay contact activated by the operation of the address control circuit 4;
R1, R2... are resistances, Dl, D2...
. is a diode, and the relay contact X1. X2...
...and resistors R1, R2... and diode D
, D2, . . . are connected in series, and this series circuit constitutes the address detection circuit 6.

This address detection circuit 6 is connected in parallel with that of other receivers 2, and two wires F at both ends thereof are wired to the central control device 1.

Then, in connection line 3, add an address signal to A,
B indicates that a control monitoring signal is added, and C indicates that an address detection output is obtained.

In FIG. 2, the same reference numerals as mentioned above indicate the same members, D indicates the terminal side, E indicates the center side, and the center side E includes a transistor circuit that performs a switching operation using the output C from the address detection circuit 6. A double selection operation detection circuit 8 is provided, and its output is obtained at a terminal 7.

Next, the operation of the above configuration will be explained.

The terminal receiver 2 receives an address signal from the central control device 1, and the address control circuit 4 determines which one
When the address control circuit 4 operates, for example, the relay contact X1 closes.

By applying a voltage to the address detection circuit 6, the relay contact X1 closes, thereby changing the state and changing the current flowing through the two wires F at both ends.

Here, by configuring the double selection operation detection circuit 8 so that it does not operate when only one relay contact is closed, but operates when two or more relay contacts are closed, as described above, Even if only one relay contact X1 is closed, no signal is obtained at the output terminal 7 of the double selection operation detection circuit 8 on the center side E, and only when two or more relay contacts are closed by mistake, A signal is available at the output 7.

That is, double malfunctions can be detected and accidents caused by such malfunctions can be prevented.

As is clear from the above explanation, the dual selection operation detection method of the present invention consists of a relay contact, a resistor, and a diode connected in series, which operate in conjunction with each terminal receiver that operates by discriminating an address signal from a central control device. The circuits connected to each other are connected in parallel, the two wires at both ends are drawn out, voltage is applied, and double selection operation is detected based on changes in the current flowing through this circuit, which prevents double selection malfunctions. It can be easily detected with a minimum number of wires, and has a unique effect.

[Brief explanation of the drawing]

FIG. 1 is an overall configuration diagram showing an embodiment of a double selection operation detection method according to the present invention, and FIG. 2 is a construction diagram showing an embodiment of a double selection operation detection circuit according to the invention. 1...Central control device, 2...
Terminal receiver, 3... Contact line, 4... Address control circuit, 6... Address detection circuit, 8
...Double operation selection detection circuit, F...Two wires at both ends, XI, X2...Relay contact, R,,R
2...Resistor, Dl, D2...Diode.

Claims (1)

[Claims] 1. Each of the plurality of terminal receivers that receives a signal from the central control device and switches off the load has an address that operates when the address signal from the central control device is discriminated and the corresponding address signal is input. A control circuit, an address detection circuit consisting of two relay contacts, a resistor, and a diode connected in series that are turned on by the operation of this address control circuit are provided, and the address detection circuit of each terminal receiver is connected to the address detection circuit of each terminal receiver connected in parallel. The two wires at both ends are connected to a double selection operation detection circuit that operates with the output from the address detection circuit provided in the central control device, and the double selection operation detection circuit detects one terminal flowing through the two wires at both ends. A change in the current value of the two wires at both ends is detected based on the current value when the selection is made, and an output is obtained only when two or more of the relay contacts are turned on to perform double selection detection. Selective motion detection method.