JPH0648417B2 - Group learning device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION Object of the Invention (Field of Industrial Application) The present invention relates to a group learning device.

(Prior Art) In a group learning system such as an LL (Language Laboratory) or a response analyzer, one center system (console-side device) controls the whole while performing two-way communication with a plurality of terminals. There is.

FIG. 3 shows the configuration diagram and FIG. 2 shows a timing chart.

In FIG. 3, the LL system will be described as an example.
As devices on the teacher side (console side), there are master tape recorders (MTR1, 2) 6, 8 and an input / output unit 2 for the teacher to operate. Booth tape recorder BTR1
~ Communicate with BTRn.

For communication, as shown in the timing chart of FIG.
A means called polling is used: → transmission to BTR1 → reception from BTR1 → transmission to BTR2 → reception from BTR2 ... → transmission to BTRn → reception from BTRn → transmission to BTR1 → reception from BTR1 → Data is transmitted and received by continuously repeating the cycle.

This will be described in detail below. In FIG. 3, first, the output of the gate 1 of the console control unit 4 is turned on to open the NAND gate N1. Then, the data to be sent to BTR1 is output to the data output line. As a result, data is sent only to the BTR1 whose gate N1 is open, but the BTR2 whose gates N2 to Nn are closed.
~ No data is sent to BTRn. This data is BT
It is intended to control R and is hereinafter referred to as a command.

Upon receiving this command, BTR1 executes the command. For example, if the command is a play command,
Put the tape recorder in the play state. After such execution is completed, status data is sent back from the B-OUT1 terminal to the teacher side. As a result, the status data is taken into the console control unit 4 via the inverter I1. Inverter I1 and other inverters I
Since the pull-up resistor R1 is connected to the output side of 2-In, the above-mentioned fetch is performed as a so-called wired OR.

The console control unit 4 determines whether the data from the BTR 1 is normal, and if it is determined to be normal, the BTR 1
Communication with is considered complete.

The above timing is shown in the timing 1 of FIG. When it is considered that the above communication is completed, the above operation is set to timing 2 to timing n and the BTR2
~ Repeat for BTRn sequentially. When the processing for the last BTRn is completed at the timing n, the console control unit 4
Returns to the first processing for BTR1.

It should be noted that serial data transmission has been described as an example of communication here. The control unit 4 and each BTR are connected by a pair of transmission and reception lines. Further, although the data shown in FIG. 4 is shown in a simplified manner, in reality, both the command and the status change depending on their contents.

(Problems to be Solved by the Invention) In the above-described conventional polling method, when data is transmitted and received between the console side and n BTRs, the total polling time is the total polling time = {( BTR transmission time) +
(Reception time from BTR)} × n is required.

For example, the total time for controlling 50 BTRs is about 1 to 2 seconds. During this time, the console control unit must wait before proceeding to the next processing. Therefore, for example, the smooth progress of the class is hindered. It is unavoidable when different data is exchanged with each booth, but in the normal class, most of the cases send the same command to all BTRs. Therefore, it means that the same command is continuously sent to each BTR, knowing the waste.

Further, when remote control of BTRs is performed, not all BTRs move in the same manner, but the operation sequentially starts one by one.

The present invention has been made in view of the above, and its purpose is to:
An object of the present invention is to provide a group learning device capable of simultaneously transmitting the same command from the console side device to each terminal device while maintaining the so-called polling communication function between the console side device and each terminal device.

[Structure of Invention]

(Means for Solving the Problems) A group learning device of the present invention connects a console side device and each terminal with a pair of wirings composed of a transmission line and a reception line, respectively, and uses a plurality of the pair of wirings. A group learning device for transmitting and receiving command and status data by polling, in the sequential operation mode, the console side device transmits a command to the terminal device by using the pair of wires. Processes the command to obtain status data, sends the status data to the console side device, and the console side device that receives the status data is the same as the next terminal based on the status data. When sending and receiving by command, in the simultaneous operation mode, all the transmission lines are used at the same time, With a simultaneous same command to send to the plurality of terminals of, configured as to prevent the status data of said plurality of terminals is transmitted to the console side device at the same time.

(Operation) In the sequential operation mode, so-called polling communication is performed between the console side device and each terminal. Also,
In the simultaneous operation mode, the same command is simultaneously sent from the console side device to each terminal. At this time, the status data accompanying the command processing is not transmitted from each terminal to the console side device.

(Embodiment) FIG. 1 shows an embodiment of the present invention, and FIG. 2 shows a timing chart thereof. In FIG. 1, the same components as those in FIG. 3 are designated by the same reference numerals as those in FIG. The apparatus of FIG. 1 differs from that of FIG. 3 in the following points. That is,
The outputs of the gates 1 to n of the console control unit 4 are directly
The OR gate O without entering the ND gates N1 to Nn
It is input to the NAND gates N1 to Nn via 1 to On. Then, the simultaneous mode control output newly provided in the console control unit 4 is applied to the other input terminals of the OR gates O1 to On.

The apparatus of FIG. 1 configured in this way has the same sequential operation mode (individual mode) as the apparatus of FIG. 3, and further has a simultaneous operation mode. The timing chart of FIG. 2 shows a case in which timings 1 and 2 are ended in the sequential operation mode, an interrupt operation is performed in the simultaneous operation mode, then the operation is returned to the sequential operation mode, and timings 3 to n and timing 1 are executed. ing.

The simultaneous operation mode is performed as follows. That is,
As can be seen from FIG. 2, the simultaneous mode control output 13 is turned on after the execution of the timing 2. By this turning on, all the NAND gates N1 to Nn become active regardless of the output states of the gates 1 to n. As a result, the data of the data output 14 is transmitted to all BTR1 to BTRn. As a result, all BTR1 to BTRn receive the command at the same time and process the command. However,
Even after the processing is completed, each BTR1 to BTRn does not output the status data to the console control unit 4, unlike the case of timing 1 to timing n. This is because the control unit 4 may malfunction if the status is simultaneously sent from the BTR1 to BTRn to the console control unit 4 after the processing. Therefore, in the simultaneous operation mode, the process automatically moves to the next timing 3 after the elapse of a certain time.

Next, in the sequential operation mode (individual mode), the BTR that has executed the command outputs status data,
BTR even if a command is executed in the simultaneous operation mode
Means for preventing status data from being output from 1 to BTRn will be described.

The command for controlling the BTR is transmitted from the console control unit 4 to each BTR as a serial data signal. Here, a command for setting the BTR to the reproduction state will be described as an example.

(1) Individual mode play command The play command used in the conventional example is represented as "01100010" (62 Hex) as binary data. Transmission is started in order from the lower bit (LSB), and transmission is completed when the higher bit (MSB) has been transmitted.

The individual mode is determined as indicated by the MSB being "0". BT that received this mode
R sends out the status data at the following timing.
This is shown as B-OUT1 at timing 1 and B-OUT2 at timing 2 in FIG.

The above is the same operation as the conventional example.

(2) Play command in simultaneous operation mode In this mode, the MSB is set to 1. In the BTR which received this command, after processing the command, the MSB is checked, and if it is 1, processing is performed such that status data is not output. This prevents the console control unit 4 from processing erroneous data as a status.

At this time, the console control unit 4 cannot confirm whether the transmitted command has been correctly executed because the status response from the BTR cannot be obtained. However, the communication route between the console control unit 4 and the BTR is not the normal individual polling. Since it was confirmed from time to time, it is very unlikely that an error will occur only in the simultaneous operation mode.

Just in case, send the command in simultaneous mode several times (for example,
It may be performed continuously (3 to 5 times).

〔The invention's effect〕

In the sequential operation mode, a command from the console side device is sequentially polled to a plurality of terminals by using a pair of wires consisting of a transmission line and a reception line respectively connected between the console side device and each terminal device. Also, since the status data can be sent and received, the console side device can confirm the current status of each terminal device by referring to the status data returned from each terminal device in succession. After this polling is completed for all of the terminals, the command and status data are repeatedly sent and received by polling again in order, so that the console side device can sequentially refer to the status data returned from each terminal. The last status data is compared with the current status and the change is calculated for each terminal. It can be confirmed, for example, if the terminal with the inner thereof has failed, can immediately search for this, therefore, quickly becomes possible to perform processing for recovering this.

In the simultaneous operation mode, the transmission line of each pair of wiring (transmission line and reception line) connected between the console side device and each terminal is used (in this case, the reception line is not used). The same command can be sent to multiple terminals simultaneously from the console side device that is capable of polling communication, so the communication time is longer than when using polling in the sequential operation mode described above. Of the total polling time (ie
{(Transmission time to terminal) + reception time from terminal}
× It is possible to reduce the number of all terminals), which allows the console side device to immediately move to the next processing after the simultaneous operation mode ends, and as a result, it is possible to smoothly proceed with the lesson. .

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of an embodiment of the present invention, FIG. 2 is a timing chart thereof, FIG. 3 is an overall configuration diagram of a conventional example, and FIG. 4 is a timing chart thereof. 4 ... Console control unit, O1-On ... OR gate,
N1 to Nn ... Nand gate, BTR1 to BTRn ...
Booth tape recorder.

Claims (1)

[Claims] 1. A console-side device and each terminal are connected by a pair of wires consisting of a transmission line and a reception line, respectively, and command and status data are transmitted and received by polling using a plurality of the pair of wires. In the collective learning device, in the sequential operation mode, using the pair of wires, the console side device transmits a command to the terminal device, and the terminal device processes the command to obtain status data, This status data is transmitted to the console side device, and the console side device which has received the status data transmits / receives to / from the next terminal device by the same command based on the status data, and in the simultaneous operation mode, , All the transmission lines are simultaneously used to send the same command from the console side device to the plurality of terminals. A group learning device configured to receive and simultaneously prevent status data of the plurality of terminals from being simultaneously transmitted to the console side device.