JP2513391B2 - Data transmission system - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data transmission system for transmitting data between a plurality of electronic devices such as a plurality of electronic cash registers.

[0002]

2. Description of the Related Art Conventionally, as such a data transmission device, there is an in-line system of POS (point of sale information management device) and the like, but in such a device, many POS terminals are connected on the same line. . Each POS terminal may be used at different sales floors, such as a food sales floor and a clothing sales floor.

[0003]

However, in such a case, since the same line is used, in the case where the clothing section collects a single item, and the food section collects a scanning, for example, in-line traffic is used. There is a problem that the amount is quite large and sometimes the POS terminal does not output the data on the inline, so that it is temporarily stopped. In this case, it would be better if the lines of each sales floor were separated, but then the settlement data of each POS terminal could not be collected collectively in one specific device such as a data collection device, and data collection would be smooth. It causes a problem that you cannot do it. Therefore, data is transmitted between a plurality of data transmission lines to which an electronic device such as a POS terminal is connected, when data is transmitted by the electronic device between the sales floors, and when data is transmitted only by the electronic equipment in the sales floor. It is desired to control data transmission in consideration of the transmission of data. However, in order to control the transmission of the data transmitted from each data transmission line between the data transmission lines to which the electronic device is connected, unless the data reception state of each data transmission line is used, for example, Data is transmitted at the same time, the data transmission control cannot be performed. The subject of this invention is
This is to enable data transmission control among a plurality of data transmission lines to which electronic devices are connected according to the state of each transmission line.

[0004]

The means of the present invention are as follows. A transmission control device is provided between the first data transmission line to which the first electronic device is connected and the second data transmission line to which the second electronic device is connected, and the first control device is provided via the transmission control device. A system for performing data transmission between the electronic device and the second electronic device, wherein the transmission control device includes stop means, storage means, and transmission means, the stop means from the first electronic device to the electronic device. The data reception from the second data transmission line is stopped based on the reception of the data transmitted via the first data transmission line.
The storage means stores the data received via the first data transmission line. The transmission means transmits the data stored in the storage means to the second data transmission line if there is no transmission data in the second data transmission line whose reception of data is stopped by the stopping means.

[0005]

The operation of the means of the present invention is as follows. A transmission control device is provided between the first data transmission line to which the first electronic device is connected and the second data transmission line to which the second electronic device is connected, and the first control device is provided via the transmission control device. A system for performing data transmission between the electronic device and the second electronic device, wherein the transmission control device includes stop means, storage means, and transmission means.
Receiving the data transmitted from the electronic device via the first data transmission line, the data reception from the second data transmission line is stopped by the stop means.
The data received via the first data transmission line is stored by the storage means. Then, if there is no transmission data in the second data transmission line whose reception of data is stopped by the stopping means, the data stored in the storage means is transmitted to the second data transmission line by the transmission means. Therefore, between the plurality of data transmission lines to which the electronic device is connected, data transmission control can be performed according to the state of each transmission line.

[0006]

[First Embodiment] The first embodiment of the present invention will be described below. FIG. 1 shows the overall structure of a data transmission device. In FIG. 1, reference numeral 1 denotes an ECR (electronic cash register) having a hand scanner 2 ... The ECR 1 ... Is mutually connected through a data transmission line 6. Other EC
One master EC that collects and aggregates data from R1
R3 and a plurality of slave ECR4 ... Sending data to the master ECR3. A floppy disk device 5 for storing the collected data is connected to the master ECR3. In addition to the one having the hand scanner 2 described above, the ECR also has an ECR8 having a stationary scanner 7 ... Which is also connected to each other through a data transmission line 6 to collect data from another ECR8. One master ECR9 to aggregate and a plurality of slave ECR10s that send this data to this master ...
It consists of

A control unit 11 is provided on the data transmission line 6.
Are provided, and the ECR is divided into a data transmission device 1 having a hand scanner 2 ... and an ECR 8 having a stationary scanner 7 ..., and an A block and a B block are formed respectively.

The control unit 11 is constructed as shown in FIG. 2, and the data from the block A is given to the CPU 14 via the transmission control unit 12, and the CPU 14 makes the RAM.
If the data is written in 15, and this data is to be transmitted to the B block, it is read out by the CPU 14 and transmitted to the B block via the transmission control unit 13. The transmission control units 12 and 13 have exactly the same configuration and are preset in the shift registers 18 and 19 via the data buffer 16 and the buffer 17 which are exchanged with each block, and the presets are respectively set to the control signals INT1 to INT4. Based on the above, the controllers 20 and 21 control.

As shown in FIG. 3, the format of this transmitted data includes a destination block number, a destination ECR number, a source block number, a source ECR number, and transmission data contents between the head code and the end code. ing. This data is sequentially preset in the B register 22 in the CPU 14, and when the head code is preset in the B register 22, a flag is set in the C register 23 and the destination block number is set in the B register 2.
When the destination block number is preset to 2, the destination block number is preset to the D register 24, and when the source block number is preset to the B register 22, the source block number is preset to the E register 25. In addition to the CPU 14, an arithmetic unit 26 and a control unit 27 for performing arithmetic processing and various control processes are provided, and a ROM 28 for storing programs for performing various transmission processes is provided in the control unit 11. ing.

The ECR 8 is constructed as shown in FIG. 4, and the data input from the stationary scanner 7 and the data input from the keyboard 29 are respectively scanned by the scanner i /.
R via the F30 and key i / F31 by the CPU 32
In addition to being written in the AM 33, it is displayed on the display unit 35 via the display i / F 34 and R / J printed on the printer 37 via the printer i / F 36. RAM3 above
The data in 3 is read by the CPU 32 and output to the other ECR 8 and the control unit 11 through the data transmission line 6, and the data from the other ECR 8 and the control unit 11 is written to the RAM 33 by the CPU 32. ROM
38 stores programs necessary for the CPU 32 to perform various transmission processes. The ECR 1 described above also has the same configuration as the ECR 8 except for the hand scanner 2.

[0011]

[Operation of First Embodiment] Next, the operation of this embodiment will be described. When the power of the control unit 11 is turned on, the CP of the control unit 11
U14 starts the flow process shown in FIG. That is,
The CPU 14 initializes the registers 22 to 25 and the RAM 15 (step A1), and the transmission control units 12 and 13
Is set to a receivable state (steps A2 and A3). Accordingly, the shift registers 18, 1 of the transmission control units 12, 13 are
The data from each block can be preset in No. 9.

Now, the B block master ECR9 (ECR
From the number 10), the master ECR3 (E
If the data is sent to the CR number 15), this data is the destination block number "A", the destination EC.
R number "15", sender block number "B",
The transmission source ECR number becomes "10", which is preset in the shift register 19 of the transmission control unit 13 in charge of the B block. Then, the controller 21 outputs the control signal INT3 to the CPU 14, which causes the CPU 14 to operate as shown in FIG.
Start the flow process described in.

That is, in order to avoid data collision and processing confusion, the CPU 14 stops the driving of the transmission control unit 12 so as not to accept the reception from the block A (step B1), and the transmission data in the shift register 19 is transferred. The B register 22 is preset (step B2). If the flag is not set in the C register 23, the CPU 14 sets the flag in the C register 23 when the head code is obtained (steps B3 and B4), and if the destination block number of "A" is obtained, The CPU 14 presets this "A" number in the D register 24 (steps B5 and B6), and if the sender block number of "B" is obtained, the CPU 14 sets this "B" number to E.
Preset in register 25 (steps B7, B
8).

Next, the CPU 14 stores the received data in the RAM.
Preset to 15, and if you don't get the end code,
The destination block number of the D register 24 and the source block number of the E register 25 are compared (steps B9 to B11). Now, since the destination block number is "A" and the destination block number is "B",
The CPU 14 determines that it is necessary to perform data transmission via the control unit 11, stops driving the transmission control unit 13, and sets the transmission control unit 12 in the transmission state (step B1).
2), outputting the control signal INT4 to the transmission control unit 12,
Transmission processing of the A block to be described later to the master ECR3 is performed.

In this case, if the destination block number and the source block number are the same, the CPU 14 determines that it is not necessary to perform data transmission via the control unit 11, and initializes the registers 22 to 25 (step B13), the transmission process is not performed. Therefore, data transmission within the same block is performed without the control unit 11, and the data transmission line 6 is blocked by the control unit 11.

In this way, the data transmission line 6 can be used for each block, and data transmission can be performed efficiently. Further, as described above, the CPU 14 gives the control signal INT4 to the transmission control unit 12, and then starts the transmission process shown in FIG. That is, the CPU 14 causes the data on the data transmission line 6 of the A block to be taken into the buffer 16 and determines whether the data is being transmitted on the data transmission line 6 (steps C1 and C2). Here, the transmission timing from the control unit 11 will be described with reference to FIG. First, FIGS. 8A, 8B, and 8C are diagrams showing data transmission / reception timings between the master ECR3 and the slave ECR4 of the A block, and the normal master ECR3 sequentially transmits data to the slave ECR4. A process of inquiring whether or not there is is performed at regular intervals. In this case, the master ECR 3 transmits the start code, the inquiry destination machine number (11) and the end code.
If the slave ECR 4 that received this data has transmission data, the machine number (11) including the start code and the transmission data is transmitted and the master ECR 4 is transmitted.
3 and the slave ECR 4 are connected to transmit and receive data. 8D and 8E are diagrams showing data transmission / reception timings between the control unit 11 and the master ECR 3, and the control unit 11 sends data from the slave ECR 4 when inquiring the presence / absence of transmission data between the master and slave ECRs. It is determined that there is no data on the line at a timing slightly deviating from the transmission data transmission timing (the control unit 11 sees the transmission data at a certain timing at every constant period, so the connection is made on the line). If there is data), the master ECR3 is inquired about the data transmission request (the master ECR3 stops the inquiry from the next slave ECR by the inquiry from the control unit 11). If the master ECR3 is empty, the control unit 11 starts data transmission to the master ECR3. That is, as shown in the left part of FIG. 8, if data is being transmitted in the A block, the transmission process is not performed. If the data transmission is not completed as shown in the right part of FIG. 8, the destination master ECR of the destination block A number 15
3 is inquired about data transmission, and the master ECR3
If there is more response, RAM until END code is obtained
The contents of 15 are preset in the shift register 18 and transmitted on the data transmission line 6 (step C3 to
C6).

Next, the CPU 14 initializes the RAM 15, the buffer 16 and the shift register 18 to stop the output of the control signal INT4, and then the transmission control units 12 and 13.
Is set to a receivable state (steps C7 and C8).

In this way, the data transmitted between different blocks is transmitted via the control unit 11 so that the data transmission process can be performed smoothly and the data is transmitted to the master E.
It can be collected in CR3 all at once. The transmission process described above is performed for every 4 bytes by dividing the 16-byte transmission data of FIG. 3 into four.

Similar processing is also performed in the transmission from the A block to the B block. In this case, the drive of the transmission controller 13 is stopped in step B1.
In step B12, the driving of the transmission control unit 12 is stopped, the transmission control unit 13 is set to the transmission state, and the control signal I
In addition to outputting NT2, control signal I is output in step C7.
The output of the control signal INT2 instead of NT4 is stopped.

[0020]

Second Embodiment FIG. 9 shows a second embodiment. In this embodiment, each ECR is divided into three blocks A, B, and C, and two control units 11 are provided between each block.

In this embodiment, data can be transmitted between the three blocks. When the number of blocks is increased, the number of control units 11 may be increased accordingly.

[0022]

Third Embodiment FIG. 10 shows a third embodiment.
In the present embodiment, the A block has only one master ECR3 that collects data from other slave ECR4, and the data from each slave ECR4 ... Is preset in the master ECR3 via the control unit 11, and The data of the master ECR3 itself is also sent to the control unit 11 and then transmitted to the master ECR3 to be preset.

Therefore, the registration data of the master ECR3 itself can be processed in the same manner as the registration data of the other slave ECR4, and it is different depending on whether the data is from the master ECR3 itself or from another. Processing is not necessary, and the processing program becomes simpler.

[0024]

Fourth Embodiment FIGS. 11 and 12 show a fourth embodiment. In this embodiment, the data of the slave ECRs 4 and 10 are collected in the master ECRs 3 and 9, respectively, and the data is transmitted between the master ECR 3 and the master ECR 9. As shown in FIG. 12, the transmission data format in this case is a destination ECR number, a source ECR number, and only a pass code, and there is no destination block number or destination block number. This pass code is set only when transferring from one block to the other block, whereby the pass code determining unit 39 of the control unit 11 determines that the control unit 11 needs to pass,
The pass code is preset in the pass code storage unit 40, and the pass direction, that is, the master ECR3
From the slave ECR4 or from the slave ECR4 to the master ECR3 is preset in the passage direction storage unit 41. Then, data transmission is performed when the data transmission line 6 becomes empty.

In the present embodiment, when data passes through the control unit 11, data transmission is performed between the master ECR3 and the master ECR9, and there is no transmission between other ECRs, and the data processing is simplified accordingly. The destination block number and the source block number are also unnecessary, and a pass code simply indicating whether or not a pass is necessary is sufficient.

[0026]

[Fifth Embodiment] FIGS. 13 and 14 show a fifth embodiment. In this embodiment, each ECR is divided into three blocks A, B, and C, and one control unit 11 is provided at the center of each block, and accordingly, the control unit 11 transmits data for A block. Control unit 12, transmission control unit 13 for B block
Besides, a transmission control unit 42 for the C block is also provided.

In this embodiment, one control unit 11 can perform data transmission between three blocks. When increasing the number of blocks, the number of transmission control units may be increased accordingly.

Although the device is applied to the data transmission of the electronic cash register in the above embodiment, the device is not limited to this and may be applied to other electronic devices.

[0029]

According to the present invention, when data is received from an electronic device among a plurality of data transmission lines to which the electronic device is connected, reception from the transmission line on the transmission side is stopped and the received data is received. Is stored, and the stored data can be transmitted if the transmission line on the transmission side is free. As described above, since the data transmission control can be performed according to the data transmission state of each transmission line, the data transmission can be surely performed without indiscriminately transmitting the data.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram of a first embodiment.

FIG. 2 is a circuit diagram of a control unit 11.

FIG. 3 is a transmission data format diagram and a circuit diagram of ECR8.

FIG. 4 is a circuit diagram of ECR8.

FIG. 5 is a flowchart of data transmission / reception processing in the control unit 11.

FIG. 6 is a flowchart of a data transmission / reception process in the control unit 11.

FIG. 7 is a flowchart of data transmission / reception processing in the control unit 11.

FIG. 8 is a diagram of a time chart of data transmission.

FIG. 9 is an overall configuration diagram of a second embodiment.

FIG. 10 is an overall configuration diagram of a third embodiment.

FIG. 11 is an overall configuration diagram of a fourth embodiment.

FIG. 12 is a transmission data format diagram.

FIG. 13 is an overall configuration diagram of a fifth embodiment.

FIG. 14 is a circuit diagram of the control unit 11.

[Explanation of symbols]

 1, 8 ECR 3, 9 Master ECR 4, 10 Slave ECR 5 Floppy disk device 6 Data transmission line 11 Control unit 12, 13, 42 Transmission control unit 14 CPU 15 RAM 39 Pass code determination unit

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display location H04L 12/28 9466-5K H04L 11/20 B 12/40 G06F 15/21 310Z 12/66

Claims (1)

(57) [Claims] 1. A transmission control device is provided between a first data transmission line to which a first electronic device is connected and a second data transmission line to which a second electronic device is connected. A system for performing data transmission between the first electronic device and the second electronic device via the first electronic device via the first data transmission line to the transmission control device. Stop means for stopping the data reception from the second data transmission line based on the reception of the data, storage means for storing the data received through the first data transmission line, and data for the stop means. Transmission means for transmitting the data stored in the storage means to the second data transmission line if there is no transmission data in the second data transmission line that has stopped receiving Characteristic data transmission system.