JPS5925438B2 - remote multiplex controller - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a remote multiplex control device using a time division multiplex transmission system.

FIG. 7 is a diagram showing a conventional wiring method of a so-called three-way configuration.

The conventional example shown in the figure is used, for example, to control lighting for stairs, and a changeover switch SW2 is placed at the top of the stairs, and a changeover switch SWI is placed at the bottom of the stairs. AC is a commercial alternating current power supply, and L is a lighting load connected in series to this, which illuminates the stairs when turned on. By wiring in such a three-way configuration, the lighting load L can be turned on and off from the changeover switch SW2 at the top of the stairs or from the changeover switch SWI at the bottom of the stairs. For example, in the circuit configuration shown in Fig. 7, one selector switch SWI is switched to the b side and the other switch SW2 is switched to the a side, so the lighting load L is turned off, but when going down the stairs. When a person switches the selector switch SWI at the exit of the stairs to the a side, the lighting load L lights up. Then, when the person who has descended the stairs switches the changeover switch SW2 at the top of the stairs to the b side, the lighting load L is turned off. Wiring in this three-way configuration is convenient because it allows one load to be controlled on and off from two locations, but it is better to connect the pair of changeover switches SW4 and SW2 with three-wire wiring. However, there was a problem in that the wiring work was time-consuming. Conventionally, in a remote multiplex control system using a time division multiplex transmission method in which a large number of terminals are installed on a dedicated two-core wire extended from a central control panel, two of any three terminals are The above selector switch SWI
, SW2, and the remaining one corresponds to the lighting load L.
It has been strongly desired to be able to complete wiring work for a three-way configuration using only dedicated two-core wires. The present invention has been made in view of the above-mentioned points, and its purpose is to connect a large number of terminal devices installed on a dedicated two-core wire extending from a central control panel.
Any three terminals are configured to have a configuration equivalent to the so-called three-way configuration as described above, so that two terminals can control the remaining terminals, and the combination of three paths can be easily changed. so that you can easily change the correspondence relationship.
Furthermore, it is possible to form a number of three-way configurations.

The present invention will be explained in detail below with reference to Examples. FIG. 1 is a basic circuit diagram of the remote multiplex control device of the present invention, in which one central control panel 1 and a plurality of terminal devices 2 are connected by non-polar connection using a dedicated two-core wire 3. A cyclic time division multiplex transmission system is used to perform independent operations. , in which an address is given to each terminal 2 by the address switch 4 of each terminal 2, and the central control panel 1 and each terminal 2 sequentially transmit and receive pulse signals cyclically. In addition, non-polarization is achieved by adopting a bipolar symmetrical pulse system. On the dedicated two-core wire 3, as shown in FIG. 2a, there are an initial signal P1, an address signal P2, and a control signal P3.
and a return signal standby/signal P4 are transmitted from the central control panel 1, and a return signal is transmitted from the terminal device 2. The terminal device 2 whose address matches is selected by the address signal P2, and the load switching contact 5 of the terminal device 2 is controlled by the control signal P3. Then, the return signal causes the data input to the control input switch 6 of the terminal device 2 with the matching address to be returned from the terminal device 2 to the central control panel 1. Here, the return signal is transmitted in current mode, and the others are transmitted in voltage mode. Central control panel 1
As shown in FIG. 3, it is composed of a power supply circuit 7, a signal generation circuit 8, and a coupling circuit 9. The coupling circuit 9 converts the C, 5V symmetrical pulse signal sent from the signal generation circuit 8 into -2
It drives with bipolar symmetrical pulses of 4V and +24V, and detects the return signal returned from the terminal device 2 and sends it to the signal generation circuit 8.

The signal generation circuit 8 is a memory (RAM) as shown in FIG.
10, address counter 11, first shift register 1
2 and a second shift register 13, the output of the address counter 11 and the data in the memory 10 are sent to the coupling circuit 9 as a signal output via the first shift register 12, and conversely to the terminal device detected by the coupling circuit 9. The return signal from 2 is written into the memory 10 via the second shift register 13. The output of the address counter 11 determines both the address of the terminal 2 and the address of the memory 10. At this time, the n-th bit of the address of the memory 10 is input by the first gate 14 to the n-th bit of the output of the address counter 11 and the read/write signal R/W of the memory 10.
Insert the exclusive OR of Note that the first shift register 12
is a parallel input, serial output shift register, and the second shift register 13 is a serial input, parallel output shift register. Further, FIG. 2b shows the readout signal of the memory 10, the second
Figure c is a write signal. The terminal device 2 is as shown in Fig. 5.
The pulse signal input from the dedicated two-core wire 3 is converted into a voltage of 0 to 5 V by the terminal coupling circuit 15, the pulse width is determined by the pulse width determining circuit 16, and a signal of 1 or O is sent to the shift register 17. It will be done.

This shift register 17 is a serial input, parallel output shift register, and the parallel address signal output from this shift register 17 is judged by an address comparison circuit 18 to see if it matches the address switch 4. A control signal is sent to the rate life circuit 19. Further, the control input is generated into a return signal by the pulse width determining circuit 16 in the return signal forming circuit 20, sent to the terminal coupling circuit 15, and transmitted as a return signal through the dedicated two-core wire 3. Now, if the output of the address counter 11 is x (the n-th bit is O), the return signal from the terminal device 2 at address x is written to address x in memory 10.

Here, when the R/W signal is O, it is a write state, and when it is 1, it is a read state. Next, when data is read from the memory 10 in order to send a control signal, the R/W signal becomes 1, and the n-th bit of the address of the memory 10 is inverted by the first gate 14. Therefore, data at address X+2n-1 is read from memory 10 and sent as a control signal to terminal device 2 at address X. Conversely, when the output of the address counter 11 is x+2n-1 (the n-th bit is 1), the return signal from the terminal at address X+2n-1 is the address X+2n-1 in memory 10.
When reading, the data at address X in the memory 10 is sent as a control signal to the terminal device 2 at address X+2n-1. In this way, the terminal device 2 at address x and the terminal device 2 at address X+2n-1 can control each other. Next, FIG. 6 is a diagram showing how the remote multiplex control device of the present invention is used. In the figure, the input terminals 1N1 to IN3 of the terminal device 21 whose address is x (the n-th bit is O) have inputs A, B, and C to the terminal device 21 and the terminal device 2.
The exclusive OR with the outputs 01, 02, and 03 of 1 is inputted via the second gate 21. Terminal 2 with address X
When data A″, B″, and C are given to input terminal 1,
A, B',
Data of C appears. Also, the address is X+2n-1
Data A, b are input to the input terminals 1N1 to IN3 of the terminal device 22.
, c, data A, b, and c appear at the output terminals 01 to 03 of the terminal device 21 whose address is x. The output data is input data A and B of the terminal device 21 at address x.
, C are input to the input terminals 1N1 to IN3 of the terminal device 21 at address X. Here, the first terminal device 21 corresponds to one changeover switch SW in the conventional example shown in FIG. 7, the second terminal device 22 corresponds to the other changeover switch SW2 in the conventional example shown in FIG. The terminal device 23 corresponds to the lighting load L of the conventional example shown in FIG. 7, and is equivalent to the conventional so-called three-way wiring. For example, a lighting control circuit for a lighting load is connected to the output terminal 01 of the third terminal 23 as a controlled load, and when the output terminal 01 is 1, the lighting load is lit, and when the output terminal 01 is O, the lighting load is The operation when the light is turned off will be explained. First of all
When the input A of the terminal device 21 is O and the input a of the second terminal device 22 is also O, the output terminal 01 of the terminal device 21 is O.
Therefore, the output N of the second gate 21 that calculates the exclusive OR becomes O, and the input terminal 1N of the terminal device 21 becomes O. Therefore, output terminal 01 of terminals 22 and 23
becomes O, and the lighting load connected to the terminal device 23 is turned off. In this state, for example, the first terminal 21
When controlling the lighting of the lighting load from the location, the input A of the terminal device 21 is inverted from 0 to 1. As a result, the output A7 of the second gate 21 becomes 1, and the output terminals 01 of the terminals 22 and 23 become 1, so that the lighting load is turned on. Next, in this state, for example, the second
When controlling the lighting load to turn off from the location of the terminal device 22, the input a of the terminal device 22 is inverted from 0 to 1.
As a result, the output terminal 01 of the terminal device 21 becomes 1, and since the input A is 1 as described above, the output N of the second gate 21 for calculating the exclusive OR becomes O. Therefore, the input terminal 1N1 of the terminal device 2 becomes O, and the output terminals 01 of the terminal devices 22 and 23 become O, so that the lighting load is in the 7-T state. That is, when the input A of the terminal device 21 and the input a of the terminal device 22 are both 1 or both O, the output N of the second gate 21 for calculating the exclusive OR
becomes O, the input terminal 1N1 of the terminal device 21 becomes O, the output terminals 01 of the terminal devices 22 and 23 also become O, and the lighting load is controlled to turn off.
When one of the input A of the terminal 22 and the input a of the terminal 22 is 1 and the other is O, the output N of the second gate 21 for calculating the exclusive OR becomes 1, so the input terminal of the terminal 21 1N1 is set to 1, and the output terminal 01 of the terminal device 22 and 23 is also set to 1, and the lighting of the lighting load is controlled. Therefore, the above-mentioned lighting load can be controlled to turn on and off freely from either the first terminal device 21 or the second terminal device 22, and as a result, as shown in the conventional example in FIG. It is possible to realize an operation equivalent to that of wiring in a so-called three-way configuration. Note that the address x (
7) When the nth bit of f is 1, the address is
2n-1 terminal device 2 and the above-mentioned three-way configuration can be realized, but in this regard, the address X-2n
If -1 is set as y, the terminal 2 at address y where the nth bit is 0 and the address y+2n- where the nth bit is 1
Since this is equivalent to the relationship with the terminal device 2 of No. 1, the result is the same as when the n-th bit of the address x is O as described above. The present invention is configured as described above, and a terminal device having an address The return signal of the terminal becomes the control signal of the other terminal, and the exclusive OR operation output of the external input signal and the output signal is sent to the input terminal of either one of the first and second terminal devices. is input, and a third terminal having the same address as the other terminal is provided so that the output signal of the third terminal can be controlled from both the first and second terminals, so central control is possible. Among the many terminal devices installed on the dedicated two-core wire extended from the panel, any three terminal devices are configured equivalent to the so-called 3-way configuration shown in the conventional example in Figure 7.
In addition to being able to control the remaining terminals from one terminal, the combination of the three routes can be easily changed and the correspondence relationship can be easily changed.
Furthermore, it is possible to form several sets of three-way configurations.

[Brief explanation of drawings]

Fig. 1 is a basic circuit diagram of an embodiment of the remote multiplex control device of the present invention, Figs. 2 a to c are main signal waveform diagrams of the above, Fig. 3 is a circuit diagram of the central control panel of the above, and Fig. 4 is a circuit diagram of the signal generation circuit same as above, FIG. 5 is a circuit diagram of the terminal device same as above, FIG. 6 is a circuit diagram of an embodiment of the present invention, and FIG. 7 is a circuit showing an example of conventional three-way configuration wiring. It is a diagram. 1... Central control panel, 2... Terminal, 8
......Signal generation circuit, 10...Memory, 11...Address counter, 14...
...First exclusive OR gate, 21...Second exclusive OR gate.

Claims (1)

[Claims] 1. In a remote multiplex control device that transmits pulse signals between one central control panel and multiple terminal devices using a cyclic time division multiplex transmission method, a An address counter that outputs address data in a base number and whose output sequentially changes cyclically, and a memory that stores a control signal to be sent to each terminal device and a return signal sent from each terminal device for each address, The output of the address counter is sent as the address signal of the terminal device and also input to the address input of the memory, and one of the outputs of the address counter is input to the n-th input of any one bit among the address inputs of the memory. , inputs the output of the n-th bit corresponding to any one of the above bits and the exclusive OR operation output of the memory read/write signal, and selects a first one having an address x where the n-th bit is 0. Terminal and address x+2^n^-^ where the nth bit is 1
1, so that the return signal of one becomes the control signal of the other, and an external signal is connected to the input terminal of one of the first and second terminals. A third terminal device is provided which inputs the exclusive OR operation output of the input signal and output signal from the terminal device, and has the same address as the other terminal device, and outputs the output signal of the third terminal device from the first and 1. A remote multiplex control device characterized in that it can be controlled from two terminal devices.