JPS60149240A - Multiplex transmission system - Google Patents

Abstract

PURPOSE:To decide easily the end of the confirming transmission for checking of each slave device at the side of a master station by sending always the signal sent back from an artificial slave device to the master device through a repeater regardless of the state of the signal line at the slave device side. CONSTITUTION:The send-back signals RP of each slave device 2 and an artificial slave device 8 which are sent back from a repeater 4 are checked by a master device 1 in a multiplex transmission system connected with the device 1, devices 2, the repeater 4 and the device 8. The device 8 can receive directly the transmission output of the repeater 4 by the impedance of a resistance 12 at an input/output part of a slave device MODEM6 of the repeater 4 even though a signal line 3 is inapplicable due to a shirt circuit fault, etc. Thus the repeater 8 can transmit directly the signal RP to a reception circuit 6a of a repeater 4 via an OR gate 10a in response to the own calling. Therefore the repeater 4 combines the signal RP and the signal sent from the device 1 to the device 8 and sends these combined signals to the device 1. Then the device 1 decides the end of the confirming transmission.

Description

DETAILED DESCRIPTION OF THE INVENTION [Technical Field] The present invention relates to a multiplex transmission system using time division multiplex transmission.

[Background technology]

FIG. 1 shows a system 41G configuration of a multiplex transmission system such as a remote control and monitoring system using power line transport. Signal line (3) from sharp instrument (1) to each child separation (2)
The two are connected via the . Figure 3 shows the format of signals transmitted and received between the sharp device f++ and the remote controller (2). Data is transmitted serially, and address data AD possessed by each terminal unique to the remote controller (2) is shown in Figure 3. and control data CD are sent from the sharpener (1) to the remote control (2). Zi Li (2), which received the signal, sends a reply 9RP immediately after receiving the signal, and
By receiving this reply signal RP, the child is released (2)
This confirms that the message was received correctly.

In such a system, if the distance indicated by X in FIG. 1 is long, a repeater (4) as shown in FIG. 2 is required. The repeater (4) is called a repeater, and has the versatility to be used commonly in all systems that use the previous signal. Its function is to once receive a serial signal, and then transmit it to the signal line on the opposite side. (3) It has a function to send to. FIG. 4 is a diagram for explaining the operation of the repeater (4) together with the handling of the reply %RP.

First, let us consider the signal (5) in FIG. 5, that is, the signal from the sharpener fl to the tip (2). This signal is shown in Figure 4 (A
) A signal consisting of address data AD indicating VC and control data CD, and when this signal prisoner is sent, child separation (2
) does not appear on the signal line (3). Next, see Figure 4 (Tough signal, Tsumashi repeater (
In the case of the signal shown in (B) in Fig. 5, which is sent from the prisoner's signal on the signal line (3) on the opposite side from the sharps (1), the repeater (4) transmits the prisoner's signal to the signal line (3) on the opposite side from the sharps (1). 2) is relayed to the connected side, and in this case, the child release (2) sends a reply signal R.
Send P. Since this reply signal RP cannot be received by the sharp device (1), the repeater (41) must send the address data AD, control data CD1 reply signal RP together to the main device jl side as shown in Fig. 4(C). Figure 5 (Q belief 9),
The presence of the reply signal RP is notified to the sharp instrument (fl).

Also, when there is no reply signal RP from child separation (2) (C)
signals are omitted. Figure 6 shows a block of the repeater (4), which includes a modem (5) that transmits and receives signals from the sharpener (1) side, and a modem (5) that sends and receives signals from the remote control (2) side. When this repeater (4) is used in the system shown in FIG.
) cannot recognize the reply signal RP of child separation (2) at the stage shown in Figure 5.

In such a system, when the power is turned on, in order to check how many channels the electronic device (1) is connected to the remote controller (2), a problem arises when the device sequentially sends a signal to all channels. For example, if the number of channels currently in use is from 1 to 100,
After sending signals to all channels, while waiting for the signal corresponding to signal (C) in Figure 5, the repeater (4) is transmitting and the relay transmission has not been completed. ) side signal line (3
), it is impossible to distinguish whether a signal is being returned or not.0 [Object of the Invention] The present invention has been made in view of the above-mentioned problems, and its purpose is to change the function of the repeater. There is a method that provides a multiplex transmission system that solves the above-mentioned problems without causing problems.

[Disclosure of the invention]

@Figure 7 is a circuit block diagram of the repeater (4) section used in one embodiment of the present invention, and the remote control (2) of this repeater (4)
The conventional system and the system of the present invention are different from each other in that the pseudo-separation (8) is added to the side seven-dem (6). Figure 8 shows the child separation (2) side 't:dem (6) corresponding to the block in Figure 6.
), the receiving circuit (6a) is connected to the coupling coil (9) via the gate circuit (+01), and the transmitting output of the transmitting circuit (6b) is connected to the transistor (Ila).
(l lb) is connected to the coupling coil (9) with a low output impedance by a push-pull, three-way, three-way output stage. Therefore, in the present invention, the inverter of the gate circuit is replaced with an OR gate (10a) powered by two people, and the transmission output of the pseudo gate circuit (8) is directly connected to one input terminal of the OR gate (IOa). ) to the transistor (lla) via the inverter (11).
) (11b) and the resistor (11), and the input/output of the seventh dam (6) on the side of the isolation (2) of the repeater (4) is connected to the circuit configuration shown in Figure 9. The section has been changed. Pseudo child separation (8) has the same function as double child separation (2),
The set channel is different from the used channel of child separation (2). For example, if the number of used channels is 100 channels, it is set as 101 channel, and an address corresponding to this channel is set.

However, as shown in Figure 10, the sharp tool (l) and the
, when the sharp device (1) checks the connecting device (2) in a system in which the repeater (4) and the pseudo-separator (8) are connected, the pseudo-separator (8) is included from the sharp device fi+. 1chi 17
．． The signals from channel 7 to channel 101, for example, are transmitted sequentially, and the signals are sent back to each child via the repeater (4).
2) and the reply signal RP from the pseudo child separation (8). At this time, the signal line (
Even if 3) is unusable due to a short-circuit accident, pseudo-separation (8) is possible. In the case of repeater (4), the remote side modem (
Since it is possible to directly receive the transmission output of the repeater (4) by the impedance of the resistor C11) of the input/output section of 6), the pseudo remote control (8) sends a reply signal RP in response to its own call. Directly repeater (
4) can be sent to the receiving circuit (6a). Therefore, in the repeater (4), the reply message 9 from this pseudo child separation (8)
By combining RP and the belief in the pseudo-separation (8) from the sharp instrument (1) as shown in Figure ((') for 81 yen, the sharp instrument (1) is
), it becomes K. Result: 10 for sharp tool (1)
If the reply message 9JRP corresponding to 1 channel is received, it can be confirmed that the confirmation transmission has been completed.

〔Effect of the invention〕

In the multiplex transmission system configured as described above, the present invention connects the receiving input and the transmitting output to the input/output section of the 7-way side of the repeater in connection with the function of the slave side signal line, and A pseudo-separator with a different address and inclination is attached, and the device sequentially calls any one or more child-receivers as necessary, and determines whether or not there is a reply signal from each child-receiver. Since the pseudo child separation is called last when checking for existence, the reply signal from the pseudo child separation is always sent sharply via the repeater, regardless of the state of the signal line on the child separation side. Items that can be returned to the container,
Therefore, the Sharp device can determine whether the correct M transmission for checking each child separation has been completed based on the presence or absence of the pseudo child separation reply signal, and there is no need to perform processing such as waiting for an extra timer. This has the effect that the conventional system can be easily used without having to change the functions of the system.

[Brief explanation of drawings]

Figure 1 is an overall schematic configuration diagram of the basic multiplex transmission system, Figure 2 is an overall schematic configuration diagram of a conventional system, Figure 3 is an explanatory diagram showing the basic trust former type site, and Figure 4 is an explanatory diagram showing the basic former system.
The figure is an explanatory diagram showing the signal transmission format of each part of the conventional system, Figure 5 is an explanatory diagram of the signal transmission and reception operation of each part of the same as above, and Figure 6 is a circuit diagram of the repeater used in the above.
Fig. 7 is a circuit block diagram of the repeater portion of an embodiment of the present invention, Fig. 8 is an explanatory diagram of the main part of Fig. 6, and Fig. 9 is an explanatory diagram of the main part of an embodiment of the invention. , Figure 10 is a schematic diagram of the overall configuration of the same as above, +11 is a sharp tool, (2) is a sharp tool, (3)
is a signal line, (4) is a repeater, (6) is a remote modem, (
8) is a pseudo child release, AD is address data, CD is control data, and RP reply signal. Agent Patent Attorney Ishi 1) Chief 7 Figure 1 Figure 2 Figure 3 Figure 4 Figure 5 - Figure 6 7, 4 Figure 8 ゛n Figure 9 δ Figure 10

Claims (1)

[Claims] +1) Sends a signal consisting of address data for calling the child separation separately and control data for controlling the child separation to any one or multiple child separation in a time-sharing manner, and also sends a reply signal from the child separation. A device that checks the reception of the child release based on the presence or absence of a message, and a child device that, when called from the device, sends out the reply signal at a specific timing immediately after reception in synchronization with the received signal.
It is inserted between the sharp device and the child separation side, and after receiving the transmission signal from the sharp device, it relays the same signal as the received signal to the child separation side, and when receiving a reply signal from the child separation side, it receives the signal from the sharp device. In a multiplex transmission system equipped with a repeater that sends a new signal with a reply code added to the signal to the sharp device, and does not transmit the signal to the sharp device when the reply signal is not received, the remote side of the repeater The receiving input and transmitting output are connected to the input/output part of the 7th unit so as not to be concerned with the status of the remote side signal line, and the address is set to be different from the address of other remote units, and a reply signal is sent when a call is made from the sharp device. A pseudo child release is attached, and the pseudo child release is used when checking the presence of a child release by sequentially calling one or more child release from the sharp device as necessary and checking the presence or absence of a reply signal from each child release. A multiplex transmission system characterized in that the remote control is called last.