JPS6254249B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a bidirectional non-independent transmission method in a power line carrier control system, and its purpose is to transmit data from one location to multiple locations at once, Data from multiple locations in one
So-called 1:N transmission, in which data is received all at once, can be easily realized with a simple circuit configuration (addition of a data input section and a data output section), reducing costs and reducing signal line impedance. An object of the present invention is to provide a bidirectional non-independent transmission method in a power line carrier control system that can prevent a decrease in transmission reliability due to degradation.

In general, power line carrier control systems use power lines as signal lines to perform remote control and monitoring, and conventionally, as shown in Figure 1, transmitters 1a and 1b and receivers
a, 2b are connected to the power line 3, and the receivers 2a, 2
Loads 4a and 4b are connected to terminals b, and when a signal is transmitted from, for example, a transmitter 1a, a receiver 2a receives the signal and operates a relay contact or the like to control the load 4a on and off. receiver 2b by transmitter 1b
operate in the same way. Considering the case where a plurality of transmitters/receivers are present in this way, each transmitter/receiver is given an address code, and an example of signal formation using this is shown in FIG. In Figure 2, S is a 1-bit start mark used to synchronize the transmitter and receiver, M is a 4-bit mode code,
This indicates the content of the signal to be controlled. For example, if it is on, it is "0000", if it is off, it is "0001", and if it is dimming, it is "1000". A is the aforementioned address code, which is 4 bits long and 16 sets can exist at the same time. C is a 4-bit control code, which is used to transmit additional information such as the dimming level during dimming. FIG. 3a shows an example of the content of one bit of the above-mentioned carrier signal. Here, the carrier signal is sent in synchronization with the power frequency of the power line 3, and one bit of information is transmitted during a half wave. As a synchronization signal, a zero-cross pulse as shown in FIG. 3b is taken out from the power supply waveform and used as a basic synchronization signal. FIG. 3a shows a waveform on the power line 3 on which a carrier signal is actually superimposed, and the carrier signal is superimposed on an AC waveform. Also, in Figure 3a, the half-wave section is divided into four,
The four data are “0101” as the start mark,
“0100” is data “0”, “0111” is data “1”
The reliability has been improved as follows.

FIG. 4 shows the input and output in normal use, and the transmitter 1 has an on key 5a, an off key 5b,
Alternatively, although not shown, operation keys 5 such as an up key and a down key are connected, and the receiver 2 outputs an on-relay drive output, an off-relay drive output, a triact trigger output for dimming, etc., and outputs an on-relay winding 6a or an off-relay winding. The lamp 8 is dimmed by operating the wire 6b to operate a two-winding latching type relay or by changing the phase of the trigger pulse of the dimming triax 7. Figures 5 a to 5 c are timing charts during operation. When the series of transmission control signals in Figure 5 a ends, the on-relay drive output signal (or off-relay drive output signal) is output as shown in Figure 5 b. In addition, if necessary, a triact trigger output signal for dimming is outputted as shown in FIG. 5c.

The transmitters 1a, 1b, 1 and receivers 2a, 2b, 2 of FIG. 1 or 4 are constructed as shown in FIG. 6. The transmitters 1a, 1b, 1 monitor the signal on the power line 3 and transmit only when there is no signal, so the transmitters 1a, 1b, 1 and the receivers 2a, 2b, Both have a common circuit configuration. Reference numeral 9 denotes a modulation/demodulation section, which consists of an oscillation circuit, a switching circuit, a receiving amplifier, a power amplification circuit, a zero-cross detection circuit, etc.
Convert the above carrier signal to a logic level signal,
It also modulates the transmission data carrier wave and puts it on the power line 3. Reference numeral 10 denotes a CK generation section, which is composed of a waveform shaping circuit, a counter, etc., and generates the clock pulses necessary for each section based on the zero-cross pulse from the AC power supply. Reference numeral 11 denotes a received signal verification unit which classifies the received and modulated data into data "1", "0", start mark, etc. 12 is a reception shift register that converts the 1/0 data from the reception signal verification section 11 into parallel data and decomposes it into a mode code, an address code, and a control code. Reference numeral 13 denotes an address verification section, which is made up of a gate circuit and verifies whether the address code of the received signal matches its own address. A mode verification section 14 verifies the mode code of the received signal. Reference numeral 15 denotes a relay drive try trigger section, which includes a counter that outputs a relay drive pulse to the relay drive output for a certain period of time according to the mode code, and a counter that outputs a phase control trigger pulse after a certain period of time from the zero cross point according to the control code. It consists of Reference numeral 16 denotes a dimming data reproducing unit which reads the contents of the control code when receiving the dimming mode and determines the position of the try trigger pulse. Reference numeral 17 denotes a key input section which accepts key inputs such as on and off operations, and also inputs transmission data such as address data and dimming data, and converts the data into logic signals. Reference numeral 18 denotes a transmission data creation unit that creates parallel data to be transmitted based on key-input data, transmission/reception setting status, and the like. Reference numeral 19 denotes a start pulse generating section, which generates a start pulse for starting a transmission operation when a key is input. 20 is a transmission shift register, which converts transmission parallel data into serial data;
1 is a transmission signal generation unit, and a transmission shift register 20
The final signal to be sent to the modulation/demodulation section 9 is created by bit by bit of the serial data. 22 is an error detection section;
If the device is in the wrong mode, receives an address other than its own, or if the transmitted signal and received signal differ during transmission, the transmitting and receiving operation is stopped and the device waits in its original state. Reference numeral 23 denotes a busy detection unit, which temporarily waits if there is already a signal or noise on the power line 3 when attempting to transmit, and outputs a signal to start transmission again after a certain period of time. 24 is a transmission/reception timing control section, which controls the timing of transmission and reception and operates each section according to a clock signal.
Furthermore, when an error signal occurs, transmission is stopped and retransmission is performed after waiting for a certain period of time.
Reference numeral 25 denotes a power supply section consisting of a diode bridge, a transistor, a capacitor, etc.

In the power line carrier control system consisting of the transceiver configured as described above, the receiver 2 can control the relay on and off according to the mode code, and the transmitter 1 can control the relay on and off according to the mode code.
In addition, if an error occurs during transmission, retransmission is performed, and transmission is possible only when no other signal is superimposed on the power line 3.

However, in the above-mentioned power line carrier control system, data transmission is performed between transmitters and receivers to which the same address is set.
Since it is a so-called 1:1 transmission method, it is possible to transmit data from one place to many places at once, or to realize so-called 1:N transmission where data from many places is received at once at one place. To do this, a large number of transmitters or receivers are required on the batch transmitter or receiver, each with addresses corresponding to the addresses of the receivers in multiple locations or transmitters in multiple locations. There were problems in that the circuit configuration became complicated and the cost increased.
Furthermore, when a large number of transmitters and receivers are connected to a power line, the signal line impedance decreases, which causes signal attenuation and reduces reliability.

The present invention has been made in view of this point, and will be explained in detail below with reference to Examples.

7 to 9 show an embodiment of the present invention, in which a plurality of transmitters 1 and receivers 2 each having an address set are connected to a power line 3.
A power line that transmits data between the transceivers 1 and 2 having the same address by transmitting a signal in a signal format having a mode code, an address code, and a control code between the transceivers 1 and 2 as a signal line. In the transport control system, the transmitter 1 is provided with a data input section 26 that can set an information transmission mode code for transmitting data to all receivers 2 and input a control code having the information transmission mode code. In addition, the receiver 2 is provided with a control data output section 27 that outputs only the control code following the information transmission mode code, and each transmitter 1
The control code can be transmitted to all the receivers 2 at the same time using the information transmission mode code. The illustrated embodiment shows an example in which the functions of the transmitter 1 and the receiver 2 are integrated as a transmitting section and a receiving section to constitute a terminal device for both sending and receiving. , and a data output section 27 is added. Further, the mode data for information transmission is detected by the mode verification section 14, and the mode verification section 14 detects the information transmission mode data.
When the information transmission mode code is detected in step 4, the control code received subsequently is output from the control data output section 27. FIG. 8 is a circuit diagram of the control data output section 27 of the receiving section, and FIG. 9 is a circuit diagram of the data input section 26 of the transmitting section.

In FIG. 8, a received signal becomes a 1/0 input and is input to the reception data input of the reception shift register 12 in accordance with the zero-cross pulse of the power supply. Therefore, when the signal ends, all of the received signals are lined up in the receive shift register 12. Q ₁ to Q ₄ have control codes,
Address codes appear in Q ₅ to Q ₈ , and mode codes appear in Q ₉ to Q ₁₂ . The address code is verified by the address verification section 13 to see if it matches the own address, and the control code is latched only when the mode code is "1000" (in order from _Q12 ).
The data latch pulse is a timing pulse that is generated at the end of reception. Next, in the transmitter section of Fig. 9,
Data input section 2 formed by a shift register
12 bits of mode, address, and control data are input in parallel to 6, which is converted into serial data according to the zero cross clock, and the transmission data is sent to the transmission data creation section 18. Here, the mode code should be "1000". If you want to use other modes at the same time, you can switch them here.

Transmitter 1 and receiver 2 with these circuits added
Connect a and 2b to the power line 3 as shown in Figure 10 a and b, input 4-bit data a to transmitter 1 as shown in Figure 10 a, set the mode code to "1000" and transmit. Then, since all the transmitters 1 and receivers 2a and 2b output control codes in response to the mode code "1000", 4-bit data a is obtained for every transmitter 1 and receivers 2a and 2b. Also, as shown in Fig. 10b, 4-bit data b is input to the receiver 2a, and the mode code "1000" is input.
Similarly, transmitter 1, receivers 2a, 2b
A 4-bit output b is obtained from either of these. On the other hand, since the transmitter 1 and the receivers 2a, 2b have the same circuit configuration as described above, they can all be used as terminal devices without being distinguished as the transmitter 1 or the receivers 2a, 2b.

FIG. 11 shows four-tone channels 29a to 29d that can be called from multiple locations as an application example of the present invention, in which a control code "0001" is transmitted with a mode code "1000" from the terminal 30 as described above. This allows any terminal 30 to sound the chimes 29d connected to all other terminals 30.

As described above, the present invention connects a plurality of transmitters and receivers each having an address to a power line, and uses the power line as a signal line to transmit signals in a signal format having a mode code, an address code, and a control code between the transmitters and receivers. In a power line carrier control system in which data is transmitted between transmitters and receivers with the same address by transmitting with The transmitter is equipped with a data input section into which a control code including a mode code for information transmission can be input, and the receiver is equipped with a control data output section that outputs only the control code following the mode code for information transmission. Since the control code can be transmitted simultaneously using the information transmission mode code in the receiver, it is possible to transmit data from one place to many places at once, or to transmit data from many places at once to one place. The so-called 1:N transmission for reception can be easily realized with a simple circuit configuration (addition of a data input section and a data output section), and unlike the conventional example, multiple transmitters and receivers are provided on the batch transmission or batch reception side. This has the advantage that the cost can be significantly lower than in the case of the conventional method, and it is also possible to prevent a decrease in transmission reliability due to a decrease in signal line impedance.

[Brief explanation of the drawing]

Figure 1 is a basic block circuit diagram of a conventional power line carrier control system, Figure 2 is a signal format diagram of the same as above, Figure 3a is a 1-bit carrier signal waveform diagram of the same as above,
Figure b is a zero-cross pulse waveform diagram of the same as above, Figure 4 is a block circuit diagram with an added input/output circuit of a conventional power line carrier control system, Figures 5 a to c are timing charts during operation of the same, respectively, and Figure 6 7 is a block circuit diagram of a transmitter or receiver of a conventional power line carrier control system, FIG. 7 is a block circuit diagram of an embodiment of a transmitter or receiver used in the present invention, and FIG. FIG. 9 is a circuit diagram of the main part of the same transmitting section as above, FIGS. 10a and 10b are block circuit diagrams of embodiments of the present invention, and FIG. be. 1... Transmitter as a terminal device, 2a, 2b...
Receiver as a terminal device, 3... Power line, 26...
Data input section, 27... control data output section.

Claims (1)

[Claims] 1 By connecting multiple transmitters and receivers, each with an address set, to a power line and using the power line as a signal line to transmit signals in a signal format having a mode code, an address code, and a control code between the transmitters and receivers, the address can be set. In a power line carrier control system in which data is transmitted between the same transmitter and receiver, an information transmission mode code is set for transmitting data to all receivers, and the information transmission mode code is set. The transmitter is equipped with a data input section into which a control code can be input, and the receiver is equipped with a control data output section that outputs only the control code following the mode code for information transmission. A bidirectional non-independent transmission method for a power line carrier control system, characterized in that control codes can be transmitted simultaneously using mode codes.