JPS61295740A - Transmission controller - Google Patents

Abstract

PURPOSE:To obtain output data when it is necessary by transmitting the output data which controls a load when it is decided that the reception address of a transmitted signal coincides with the address of a transmission controller and this transmitted signal is an output data request. CONSTITUTION:It is decided where there is the transmitted data on a transmis sion line 20 or not and when there is the transmitted signal, the transmitted signal is received from a receiving terminal RX2 through a transceiver 21 and a reception address 40 specifying the object terminal of reception is compared with the address of the controller set with a controller address switch 24. When both addresses coincide with each other and the received transmitted signal is data addressed to the controller, the data is outputted from an output port OUTP 3 to the load 22. When the received transmitted signal is an output data request, on the other hand, the data outputted from the output port OUTP 3 to the load 22 is read in and a transmission destination address set with a transmission destination address switch 26 is combined as a reception address with the output data, so that the transmitted signal which is the output data is sent out from a transmitting terminal 1 to the transmission line 20 through the transceiver 21.

Description

[Detailed Description of the Invention] [Industrial Application Field] This invention provides a transmission control device,
The present invention relates to a transmission control device that performs data transmission control.

[Conventional technology]

FIG. 6 shows, for example, the K-easy beanie buoy 1.
1 (KKC-HBEI 71.1) Baseband Transmission Control Large-Scale Integrated Circuit (L8 Engineering) is a diagram showing a schematic configuration of a conventional transmission control device.

This transmission control device includes a transmission means (terminal) TI (1) that sends a transmission signal to a transmission path (not shown) via a transceiver or the like (not shown), a transmission signal sent from a communication terminal and flowing on the transmission path. Receiving means (terminal) RX (2) for receiving signals via a transceiver etc., Output means (baud) for outputting control signals to the load) OUTP (3), Input means (terminal) for receiving input signals MP (4) )% Self-address input means (terminal) for setting the self-address
SA (5), destination address input means (terminal) for setting the receiving address of the packet to be transmitted DA
(6) Transmission request input means for accepting transmission requests (
terminal) TXREQ, (7).

Next, the operation will be explained. When the transmission control device receives the transmission signal flowing on the transmission path through the reception terminal RX (2), the transmission control device inputs the reception address of the address information of the transmission signal and the self-address set at the self-address input terminal SA (5). If they match and the received transmission signal is output data directed to itself, the received data is output as a control signal to the output port 0UTP (3).

On the other hand, when a transmission request is input from the transmission request input terminal TXREQ, (7), the destination address of the packet to be transmitted set in the destination address input terminal DA (6) of the transmission signal and the input address NP ( 4) The transmission signal consisting of the input signal input from the transmitting terminal 'rx (
1) and sends it out to the transmission line via a transceiver or the like.

[Problem that the invention seeks to solve]

Conventional transmission control devices are configured as described above, so in order to send a transmission signal, it is necessary to input a request signal to the transmission request terminal, and from the communication terminal connected via the transmission path. There were problems in that data requests could not be made directly to the transmission control device, and output data controlling the load was not transmitted.

This invention was made to solve the above problems, and when direct output data is requested from a communication terminal connected via a transmission line, the output data controlling the load is transmitted as described above. The purpose of this invention is to obtain a transmission control device that can transmit data to a transmission path.

[Means for solving problems]

A transmission control device according to the present invention includes a determining means for determining whether a reception address of a transmission signal received over a transmission path matches a self-address and determining whether or not the transmission signal is an output data request; This device is provided with output data request response means for transmitting output data when it is determined that it is a data request.

[Effect]

The output data request response means in this invention is activated when it is determined that a transmission signal from a communication terminal connected via a transmission line is its own output data request, and output data is sent to the transmission line. The communication terminal connected via the transmission path can directly request output data from the transmission control device.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIG. 1, in which the same parts as in FIG. 6 are denoted by the same reference numerals.

In FIG. 1, (20) is a transmission line to which a plurality of transmission control devices and communication terminals are connected, and (21) is a transmission line (20) connecting the transmission terminal TI (1) and reception terminal RX (2) of the transmission control device. ) is a transceiver that transmits and receives transmission signals, and (22) is a load connected to the output port (3).

(23) is an input signal generation circuit that is connected to the input port NP (4) and generates an input signal to be read from the input port to the transmission control device; (24) is a self-connected self address input terminal SA (5) The address switch (25) is connected to the transmission request terminal TXREQ (7), and the transmission control circuit (26) generates a transmission request signal requesting the transmission control device to perform transmission.
is a destination address switch connected to the destination address input terminal DA (6).

Figure 2 shows the configuration of Figure 1 in more detail.
) is the microcomputer that is the core of the transmission control device,
(9) is the memory used as a buffer for sending and receiving data, (
io) inputs input to the microcomputer)
INF (4) or self address input terminal 8A (5
); (11) is an input switching control signal supplied from the microcomputer (8) to the input switching circuit (10); (2za) and (221);
)) is the load connected to output capo-)0UTP (3), which is the IIFjD display and output relay, (22(ri is the contact that is controlled on/off by the output relay (2zb), (
23a) and (231)) are entrance capo) and NP (4)
These are the sensor and input switch of the input signal generation circuit connected to the

FIG. 3 shows an example of the configuration of a data transmission control system using the transmission control device shown in FIG. The load (22) connected to the transmission control device (31) can be controlled from the communication terminal (32),
The output signal used for the control can be monitored and requested from the communication terminal (32).

FIG. 4 is a diagram showing an example of the structure of a transmission signal in the data transmission control system shown in FIG. (42) is a control code indicating the type of data, and (43) is data such as input signals and output signals.

FIG. 5 is a flowchart showing a transmission control procedure in the transmission control device. In Figure 1, the transmission line (20
), it is determined whether or not there is a transmission signal shown in FIG.
(2) For better reception (Fig. 5, step 5-2), compare the reception address (40) specifying the terminal to receive the reception with the self-address set by the self-address switch (24) (Fig. 5, Step 5-3).

As a result of the comparison, if both addresses match, the control code (42) and data (
43) determines whether or not it is a request for output data (FIG. 5, step 5-4), and if the received transmission signal is data directed to itself, output capo)oty'rp(
Data is output from a) to the load (22) (FIG. 5, step 5-5).

On the other hand, if the received transmission signal is an output data request,
Read the data output from the output boat 0UTP (3) to the load (22) (Figure 5, Step 5-6), and receive the destination address set by the destination address switch (26) for this output data. address, and send the output data transmission signal from the transmitting terminal (1) to the transceiver (
21) to the transmission line (20) (FIG. 5, step 5-7).

Further, if it is determined that there is no transmission signal in the determination of the presence or absence of a transmission signal on the transmission path, the transmission control circuit (25) sends a transmission request terminal TXRI! :Q, determine the signal input to (7) (WJ5 figure, step 5-8), and if there is a transmission request, read the input signal from input port INF (4) (Figure 5, step 5-8). 9), the transmission destination address set by the transmission address switch (26) is combined with the above input signal as a reception address, and the transmission signal of the input data is sent from the transmission terminal (1) to the transmission line (20) via the transceiver (21). (Figure 5, Step 5-10)
).

In the above embodiment, the reception address of the transmission signal transmitted by the transmission control device is set by the destination address switch, but the transmission address may be set as the transmission address of the transmission signal of the output data request. Alternatively, the address specified by the data of the transmission signal of the output data request may be transmitted as the reception address.

Further, in the above embodiment, the output data is transmitted only when receiving the transmission signal of the output data request, but an output data transmission request input terminal may be provided, and transmission may also be performed by inputting the output data transmission request input terminal.

〔Effect of the invention〕

As described above, according to the present invention, when the reception address of a received transmission signal matches the self-address and it is determined that the transmission signal is an output data request, the output data controlling the load is transmitted. This has the effect that the communication terminal connected via the transmission path can obtain the output data of the transmission control device when necessary.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an example of the configuration of a transmission control device according to the present invention, FIG. 2 is a diagram showing the configuration example of FIG. 1 in more detail, and FIG.
The figure shows an example of the configuration of a data transmission control system using a transmission control device, FIG. 4 shows an example of the structure of data sent and received by the transmission control device, and FIG. 5 shows a transmission control procedure in the transmission control device. The flowchart in FIG. 6 is a diagram showing an example of the configuration of a conventional transmission control device. In the figure, (1) is the transmitting means (terminal), (2) is the receiving means (terminal), (3) is the output means (boat), (4) is the input means (port), and (5) is the self Address input means (
(terminal), (6) is the destination address input means (terminal)% (
7) is a transmission request input means (terminal). In the drawings, the same reference numerals indicate the same or similar parts. Agent: Patent Attorney Masuo Oiwa (and 2 others) Figure 3 Figure 4 Figure 5 Figure 6

Claims (1)

[Claims] a receiving means for receiving a transmission signal from a transmission path; a self-address input means for setting a self-address; and a control signal using the transmission signal as a load when the reception address of the received transmission signal and the set self-address match. an input means for receiving an input signal; a transmission request input means for accepting a data transmission request; a transmission destination address input means for setting a transmission destination address; In the transmission control device, the transmission control device includes a transmitting means for transmitting a signal obtained by adding the set destination address to the data to the transmission path, and a determining means for determining whether or not the received transmission signal is a data request signal. and output data request response means for sending a transmission signal of the output data controlling the load from the transmission means to the transmission path when the transmission signal is determined to be a data request signal. Control device.