JPS61295739A - Transmission controller - Google Patents

Abstract

PURPOSE:To obtain the input data of a transmission controller as necessary by transmitting the input data when it is decided that the reception address of a transmitted signal coincides with the address of the transmission controller and the transmitted signal is a input data request. CONSTITUTION:It is decided whether there is a transmitted signal on a transmission line or not, the transmitted signal is received from a receiving terminal RX2 through a transceiver 21, and a reception address 40 which specifies the object terminal of reception is compared with the address of the transmission controller. When both addresses coincide with each other, it is decided whether or not a control code 42 and data 43 constituting the transmitted signal are an input data request and when the transmitted signal is addressed to the controller, the data is outputted from an output port OUTP 3 to a load 22. When the transmitted signal is the input data request, an input signal is read in from an input port INP 4 and an address set with a transmission destination address switch 25 is combined as a reception address with the input signal, thereby transmitting the transmitted signal from a transmitting terminal 1 to a transmission line 20 through the transceiver 21.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a transmission control device, and particularly to a transmission control device that controls data transmission via a transmission path.

[Conventional technology]

Figure 6 shows, for example, KECH BSF 1.
．． 1 (KKC-HBEI Vl, 1) FIG. 1 is a diagram showing a schematic configuration of a conventional transmission control device shown in a large-scale integrated circuit for transmission control (I, Sr).

This transmission control device is a transmission means (terminal) that sends a transmission signal to a transmission path (not shown) via a transceiver or the like (not shown). Receiving means (terminal) RX (2) that receives signals via a transceiver etc., Output means (board) OUTP (3) that outputs control signals to the load, Input means (board) that receives input signals INF (4) , self-address input means (terminal) for setting the self-address SA (
5) Destination address input means (terminal) DA for setting the reception address of the packet to be transmitted (6) Transmission request input means (terminal) TX for accepting a transmission request
Prepare REQ (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), it 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 if the received transmission signal is output data directed to itself, the received data is output as a control signal to output port 0UTP (3).

On the other hand, when a transmission request is input from the transmission request input terminal TXRKQ (7), the reception address of the packet to be transmitted set in the transmission destination address input terminal DA (5) of the transmission signal and the input address N P ( 4) The transmission signal consisting of the input data input from the transmitting terminal 'rx
(1) and sends it out to the transmission line via a transceiver or the like.

[Problems to be Solved by the Invention] Since the conventional transmission control device is configured as described above, in order to transmit a transmission signal, it is necessary to input a request signal for input data to the transmission request terminal. There is a problem in that it is not possible to directly request input data from a communication terminal connected via a transmission path to a transmission control device.

This invention was made to solve the above problems, and its purpose is to obtain a transmission control device that can directly request input data from a communication terminal connected via a transmission path. do.

[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 from a transmission path matches a self-address and determining whether or not the transmission signal is an input data request; The input data request response means is provided for transmitting input data when it is determined that the input data is the same.

[Effect]

The input data request response means in the present invention is activated when it is determined that a transmission signal from a communication terminal connected via a transmission line is its own input data request, and sends input data to the transmission line. [Embodiment of the Invention] Hereinafter, an embodiment of the present invention will be shown in the same part as the above-mentioned FIG. 6. FIG. 1, which has the same reference numerals, will be explained.

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 load connected to the output boat 0UTP (3), and the transceiver (22) is located between If it is data, the data is output.

(23) is an input signal generation circuit that is connected to the input port N P (4) and generates an input signal to be read from the input port to the transmission control device, and (24) is connected to the self address input terminal SA (5). self address switch,
(25) 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, and (8) is a transmission control device. (9) is the memory used to buffer the transmitted and received data, (10) is the input for switching the input to the microcomputer to input port NP (4) or self-address input terminal SA (5) switching circuit, (11) is an input switching control signal supplied from the microcomputer (8) to the input switching circuit (10), (z2a) and (221)) are output capacitors) OU'
rP (3) is the load connected to the LED display and output relay, (22C) is the contact that is controlled on/off by the output relay (22b), (23a) and (23b) are the input ports NP (' 4) is the sensor and input switch of the input signal generation circuit connected to.

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 input signal from the input signal circuit (23) is sent to the communication terminal (32).
) to make a monitor request.

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

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) Performs reception (Fig. 5, step 5-2), and compares the reception address (40) specifying the terminal to receive the reception with the self-address set by the self-address switch (24) (step 5-2). Figure, step 5-3). As a result of the comparison,
If both addresses match, it is determined whether the control code (42) and data (43) constituting the transmission signal are input data requests (Fig. 5, Step 5).
-4) If the received transmission signal is data directed to itself, output the data from the output port (3) to the load (22) (FIG. 5, step 5-5).

On the other hand, if the received transmission signal is an input data request,
Read the input signal from INF (4) (Figure 5,
Step 5-6), combine this input signal with the address set by the destination address switch (25) as a reception address, and transmit the input data transmission signal from the transmission terminal (1) via the transceiver (21). (20) (FIG. 5, step 5-7).

In the above embodiment, the reception address of the transmission signal sent by the transmission control device is set to the value set by the destination address switch, but even if the transmission address of the input data request transmission signal is set as the reception address. good. Alternatively, the address specified by the data of the transmission signal of the input data request may be transmitted as the receiving address.

Furthermore, although the above embodiment shows a case in which transmission is performed only when receiving a transmission signal for an input data request, an input terminal for receiving a transmission request is provided, and transmission is also performed when a transmission request is input to that input terminal. You can do it like this.

[Effects of the Invention] As described above, according to the present invention, input data is transmitted when the reception address of a received transmission signal matches the own address and the transmission signal is determined to be an input data request. This has the advantage that the input data of the transmission control device can be obtained from the communication terminal connected via the transmission path when necessary.

[Brief explanation of drawings]

FIG. 1 is a diagram showing a configuration example 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 (boat), and (5) is the self-address input. means(
Terminals) and (6) are destination address input means (terminals). In addition, in the figures, the same reference numerals indicate the same or corresponding parts. Agent: Masuo Oiwa, patent attorney (and 2 others) Figure 1: Figure 3: Figure 4: Figure 5

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 when the reception address of the received transmission signal and the set self-address match, the transmission signal is controlled as a load. An output means for outputting as a signal, an input means for accepting input data, a destination address input means for setting a destination address, and a transmitting means for sending a signal obtained by adding the destination address to the input data to the transmission path. a transmission control device comprising: determining means for determining whether the received transmission signal is an input data request signal; and determining means for determining whether or not the received transmission signal is an input data request signal; 1. A transmission control device comprising input data request response means for sending data from the transmission means to the transmission path.