JPH0749730A - Remote power supply centralized control system - Google Patents

Abstract

PURPOSE:To control the ON of a power supply for each satellite device through a transmission line by outputting a satellite device power supply driving signal from a master device body to the transmission line and detecting the satellite device power supply driving signal on the transmission line by each satellite device to turn on the power supply. CONSTITUTION:Plural satellite POS terminal equipments 1-1 to 1-n are connected to a master POS terminal equipment 4 by a data communication line 5 through plural power supply control devices 2-1 to 2-n and a satellite power supply centralized control system 3 and signal lines 6, 8 for driving relays for switching the connection of the line 5 or the like are respectively connected between the equipment 4 and the device 3 and between the equipments 1-1 to 1-n and the devices 2-1 to 2-n. A power supply driving signal is outputted from the equipment 4 to the line 5 through the device 3 and power supplies for satellite equipment bodies are turned on by the devices 2-1 to 2-n.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a system (for example, a POS system) in which a plurality of satellite devices are connected to a master device via a transmission line, and the master device controls the satellite devices by a multi-drop method. The present invention relates to an improvement of a remote power supply centralized control device for controlling power-on of the satellite device.

[0002]

2. Description of the Related Art A plurality of satellite devices are connected to a master device via a transmission line, and the master device is an example of a system for controlling the satellite device by a multi-drop method.
In the POS system including the S terminal device, the satellite POS terminal device is provided with a PLU file in which the price is stored for each product, and maintenance such as updating of the PLU file is usually performed at night after the store is closed. For example, PL
To update the U file, the master POS terminal device sends the updated PLU file to each satellite POS terminal device, and the satellite POS terminal device that receives this PLU file overwrites and updates the PLU file stored at that time. Was going on.

[0003]

However, the PLU
Since maintenance such as file updating is usually performed at night after the store is closed, the satellite POS terminal device is powered off. When performing maintenance such as PLU file update, it is necessary to turn on the power of all satellite POS terminal devices, and the power is turned on by going to the installation location of each satellite POS terminal device. For this reason, in a store or the like where each satellite POS terminal device is installed in a remote place, it takes a lot of time to turn on the power of each satellite POS terminal device.

In addition, the RS23 from the master POS terminal device
It is conceivable to turn on the power of the satellite POS terminal device by using the transmission control signal of 2C, but it is not applicable to the POS system to which a plurality of satellite POS terminal devices are connected because of the one-to-one correspondence. . Further, there is a method of using a dedicated line for power-on control between the master POS terminal device and a plurality of satellite POS terminal devices, but this method requires a control circuit in the satellite POS terminal device. Therefore, there is a drawback that the cost becomes high when applied to the conventional POS system.

An object of the present invention is to provide a remote power supply centralized control device for controlling at least power-on of a satellite device by using a transmission line laid between a master device and a plurality of satellite devices.

[0006]

A remote power supply centralized control device of the present invention is a system in which a master device and a plurality of satellite devices are connected via a transmission line,
On the master device side, a satellite power supply centralized control device that outputs a satellite device power supply drive signal to the transmission line when receiving a remote power-on signal from the master device main body is provided, and on each satellite device side, on the transmission line Detecting means for detecting the satellite device power supply drive signal;
A power supply control device is provided, which comprises a power-on means for turning on the power supply of the satellite device main body when the satellite device power supply drive signal is detected.

Further, the power supply control device includes means for turning off the power supply of the satellite device body when receiving a power-off signal from the satellite device body.

Further, the satellite device power supply drive signal is an AC voltage signal, the detection means is a transformer in which a primary winding is connected to a transmission line, and the power supply on means is a secondary of the transformer. It is a relay means for closing the power-on terminal of the satellite device body by the output of the side winding.

[0009]

In the remote centralized control unit for power supply of the present invention, when the centralized control unit for satellite power supply receives the remote power-on signal from the main body of the master unit, it outputs the drive signal for the satellite unit power supply to the transmission line. When the power supply control device detects the satellite device power supply drive signal output to this transmission line, the power supply control device turns on the power supply of the satellite device body.

When the power supply control device receives a power-off signal from the satellite device body, the power supply control device turns off the power source of the satellite device body.

With the above configuration, when the remote power-on signal is input from the master device to the satellite power supply centralized control device, the satellite power supply centralized control device outputs the satellite device power supply drive signal to the transmission line. The power supply control device which detects the satellite device power supply drive signal turns on the power supply of the satellite device body. Also,
When the master device and the satellite device are powered on, the master device instructs the satellite device to output a power-off signal via the transmission line, so that the satellite device outputs a power-off signal to the power control device. Therefore, when the power supply control device receives a power-off signal from the satellite device, the power supply of the satellite device body is turned off. Therefore, the operation of the master device can control the power on / off of the satellite device.

Further, the satellite power supply centralized control device outputs the satellite device power supply drive signal as an AC voltage signal. The satellite device power supply drive signal is input to the primary winding of the transformer via a transmission line to the power supply control device. The power supply control device operates a relay with the output of the secondary winding to close the power-on terminal of the satellite device body.

[0013]

FIG. 1 is a diagram showing the configuration of a POS system to which a remote power supply centralized control device according to an embodiment of the present invention is applied. The POS system includes a plurality of satellite POS terminal devices 1 (1-1, 1-2, ..., 1-n) that output transaction data generated by transaction processing, and the plurality of satellite POS terminal devices 1 main body. Power control devices 2 (2-1, 2-2, ..., 2-n) that turn on / off the power of
, A satellite device power supply centralized control device 3 for outputting a satellite device power supply drive signal to the data communication line 5, and a master POS terminal device 4 for fetching and collectively managing transaction data output from the satellite POS terminal device 1 main body. And are equipped with. Satellite POS terminal 1
The data communication line 5 is connected to the master POS terminal device 4 via the power supply control device 2 and the satellite power supply centralized control device 3. Further, between the master POS terminal device 4 and the satellite power supply centralized control device 3, and between the satellite POS device.
Between the terminal device 1 and the power supply control device 2, a signal line 6 for driving a relay for opening and closing a connection such as a data communication line,
8 is connected, and the power supply control device 2 and the satellite power supply centralized control device 3 are connected to a power supply line 7 connected to a commercial power supply or the like.

FIG. 2 shows the power supply control device 2 (2-1 to 2-).
It is a figure which shows the structure of n). Each power control device 2-1 to 2-n
Have the same configuration. The power supply control device 2 includes a transformer 11
A keep relay 12 for controlling the opening and closing of the connection of the power supply line 7, a relay 13 for opening and closing the connection between the primary winding of the transformer 11 and the data communication line 5, the data communication line 5 and the satellite POS terminal device 1. And a relay 14 that controls opening and closing of the connection. The transformer 11
The set input terminal 12-1 of the keep relay 12 is connected to the secondary winding of the. The reset input terminal 12-2 of the keep relay 12, the input terminal of the relay 13 and the input terminal of the relay 14 are connected to the signal line 8. The contacts 12a and 12b of the keep relay 12 open and close the connection of the power supply line 7. Relay 13 contacts 13a, 13
b opens and closes the connection between the data communication line 5 and the primary winding of the transformer 11. The contacts 14a, 14b of the relay 14 open and close the connection of the data communication line 5 to the satellite POS terminal 1.

FIG. 3 is a diagram showing the configuration of the satellite power supply centralized control device 3. The satellite power supply centralized control device 3 includes a transformer 21 for outputting a satellite device power supply drive signal to the data communication line 5, and the data communication line 5
And a relay 22 for opening and closing the connection with the secondary winding of the transformer 21 and opening and closing the connection between the master POS terminal device 4 and the data communication line 5. The input terminal of the relay 22 is connected to the signal line 6. The contacts 22a and 22b of the relay 22 open and close the connection between the transformer 21 and the data communication line 5. The contacts 22c and 22d of the relay 22 open and close the connection between the master POS terminal device 4 and the data communication line 5.

In the normal POS system, the master POS terminal device uses a multi-drop method to provide a plurality of satellite POs.
It controls the S terminal device. The satellite POS terminal device 1 includes a PLU file in which prices and the like are stored for each product, and maintenance such as updating of the PLU file is performed at night after the store is closed. FIG. 4 is a diagram showing an operation flow of PLU file update processing of the POS system of the embodiment. FIG. 5 is a diagram showing an opening / closing sequence of each contact at the PLU file updating process of the power supply control device and the satellite power supply centralized control device of the embodiment. PL
The U file is updated by the master POS terminal device 4 transmitting to the satellite POS terminal device 1 the updated PLU file that has been fetched and stored from a store computer or the like (not shown).

The satellite POS terminal device 1 is normally powered off when the store is closed. Master POS terminal device 4
Sends a maintenance start command indicating maintenance start to all satellite POS terminal devices 1 via the data communication line 5 (n1). This maintenance start command is received only by the satellite POS terminal device whose power is on, and the satellite POS terminal device outputs a power-off signal to the power control device (n2). Upon receiving this instruction, the power supply control device turns off the satellite relay POS terminal device 1 by turning off the keep relay 12 (n3, t1). The process of powering off the main body of the satellite POS terminal device 1 will be described later. The processing of n1 to n3 is a protection processing from a signal generated when the power source of the satellite POS terminal apparatus 1 is turned on from the master POS terminal apparatus 4, which will be described later, in order to turn off the power source of all the satellite POS terminal apparatuses 1. Done.

The master POS terminal device 4 inputs a remote power-on signal to the satellite device power supply centralized control device 3 via the signal line 6 (n4). Then, the master POS terminal device 4 waits for a certain period of time (n5), and then stops the input of the remote power-on signal to the satellite device power supply centralized control device 3 (n6, t5). The processing of n4 to n6 is performed by the master P.
This is performed by the OS terminal device 4 applying a voltage to the input terminal of the relay 22 connected to the signal line 6, and waiting for a certain period of time to stop the application of this voltage. The relay 22 operates when a voltage is applied to the input terminal, and connects the secondary winding of the transformer 21 and the data communication line 5 to the contacts 22a and 22b.
Connection by closing the contacts 22c, 2
By opening 2d, the connection between the master POS terminal 4 and the data communication line 5 is released. As a result, the satellite device power supply centralized control device 3 outputs the output voltage of the transformer 21 (AC voltage obtained by stepping down the primary side input voltage) to the data communication line 5 (n7, t2). In this case, the output voltage of the transformer 21 is not input to the master POS terminal device 4 because the data communication line 5 is disconnected in the satellite power supply centralized control device 3.

The power supply control device 2 closes the contacts 13a and 13b, and this satellite device power supply drive signal is input to the primary side winding of the transformer 11, and the 2 of the transformer 11 is connected.
A voltage is applied to the set input terminal 12-1 of the keep relay 12 connected to the secondary winding, and the keep relay 12 operates. On the other hand, since the contacts 14a and 14b are opened, the satellite POS terminal device 1 has the same satellite power supply drive signal (transformer 21) as the master POS terminal device 4.
Output voltage of) is not input via the data communication line 5. When the keep relay 12 operates as described above, the contacts 12a and 12b of the keep relay 12 are closed and the power supply line 7 is connected, and the operating power is supplied to the satellite POS terminal device 1 (n8, t3).

The satellite POS terminal 1 is turned on when operating power is supplied, and applies a voltage as an operation start signal to the input terminal of the relay 13 via the signal line 8 (n9, t4). Thereby, the contacts 13a, 13b
Is operated to disconnect the connection between the data communication line 5 and the primary winding of the transformer 11. The satellite POS terminal 1 waits for a certain time (n10), and then applies a voltage to the input terminal of the relay 14 via the signal line 8 as a connection instruction for the data communication line 5 (n11, t6). As a result, the contacts 14a and 14b operate to connect the data communication line 5 to the satellite POS terminal device 1. This fixed time is the time when the master POS terminal 4 has already completed the application of the voltage to the signal line 6 (the time when the remote power-on signal stop processing (n6, t5) has already been performed). Therefore, since the voltage is not applied to the input terminal of the relay 22, the data communication line 5 and the transformer 21 are disconnected, so that the output voltage of the transformer 21 is not applied to the data communication line 5. For this reason,
The output voltage of the transformer 21 is not input to the master POS terminal device 4 and the satellite POS terminal device 1. Further, since the contacts 22c and 22d are closed, the data communication line 5 is connected to the master POS terminal device 4. Therefore, the satellite POS terminal device 1
The master POS terminal device 4 and the master POS terminal device 4 are connected to each other through the data communication line 5 via the power supply control device 2 and the satellite power supply centralized control device 3.

After the above processing is completed, the master POS terminal 4 transmits the PLU file to all the satellite POS terminals 1 via the data communication line 5 (n1).
2).

The satellite POS terminal 1 takes in the transmitted PLU file and stores it to perform maintenance processing for updating the PLU file (n.
13). Further, other maintenance processing is similarly performed between the master POS terminal device 4 and the satellite POS terminal device 1 via the data communication line 5.

When the maintenance process such as PLU file update is completed, the POS system sends a satellite POS from the master POS terminal device 4 via the data communication line 5.
A maintenance completion command indicating maintenance completion is transmitted to the terminal device 1 (n14). Upon receiving this maintenance completion command, the satellite POS terminal device 1 inputs a power-off signal to the power control device 2 (n15).

This power-off signal is first transmitted to the relay 13,
The application of voltage to the input terminals of 14 is stopped (t7). As a result, the data communication line 5 is connected to the contacts 13a and 13b.
Is connected to the transformer 11, and the contacts 14a and 14b disconnect the connection to the satellite POS terminal 1. Then, after a certain period of time, the satellite POS terminal device 1 applies a voltage to the reset input terminal 12-2 of the keep relay 12 (t8). Power control device 2 is keep relay 1
2 operates to open the contacts 12a and 12b. As a result, the satellite POS terminal device 1 is cut off from the power supply line 7, the supply of operating power is stopped (n16), and the power is turned off.

As described above, by operating the master POS terminal device 4, it is possible to control the power on / off of all the satellite POS terminal devices 1.

By the way, although an AC voltage is used for the satellite power supply drive signal in the above embodiment, if a DC voltage is used, assuming that the resistance of the data communication line is 100Ω at 100 m, then the master POS terminal device. And the satellite POS terminal is 100 meters away from the POS
In the system, the power consumption of the keep relay used is 7V
When 10 satellite POS terminal devices are connected when × 10 mA = 70 mW, 10 mA × 10 units = 100 mA will flow to the data communication line.
Voltage drop in data communication line is 100mA × 100Ω
= 10V. Therefore, the satellite power supply centralized control device needs to output a DC voltage signal of 17V or more as a satellite device power supply drive signal, and further, a DC step-down device for stepping down the input voltage to 7V is required in the power supply control device instead of the transformer. become. Furthermore, an insulating circuit for performing insulation between devices is required for the power supply control device and the satellite power supply centralized control device, which increases the cost.

On the other hand, when an AC voltage signal is used for the satellite device power supply drive signal as in the present embodiment, the transformers are provided in the power supply control device and the satellite power supply centralized control device so that the devices can be easily insulated. . Further, since the power supply control device can reduce the input voltage by the transformer, it can be applied to the POS system at low cost. For example, when applied to the POS system under the above conditions, assuming that 42V, which is a safe voltage that does not pose a danger to the human body, is the voltage of the satellite device power supply drive signal, the current flowing through the data communication line is 70mW × 10 units / 42V = 16. 0.7mA, the voltage drop in the data communication line is 16.7mA × 1
00Ω = 1.67V. Further, since the input voltage to the keep relay can be stepped down by the transformer, the step-down circuit is not required in the power supply control device, and it can be applied to the POS system at low cost.

Although the above embodiment has been described by applying it to the POS system, it can be applied to another system in which a plurality of satellite devices are connected to the master device and controlled by the multi-drop method.

[0029]

As described above, according to the present invention, by operating the master device, it is possible to control the power-on of all satellite devices by utilizing the already existing transmission line.
Therefore, for example, if the remote power supply centralized control device of the present invention is applied to the POS system, it is possible to eliminate the trouble of turning on the power of each satellite POS terminal device at the time of maintenance such as PLU file update.

By providing the power-off means in each satellite device, the master device can control the power on / off.

Further, since the satellite device power supply drive signal is an AC voltage signal, it is possible to easily insulate each device and to realize it at low cost.

Further, it is not necessary to specially devise the master device and the satellite device main body itself, and a satellite power supply centralized control device and a power supply control device are connected to each device main body to transmit a remote power-on signal and a power-off signal. Since it is sufficient to connect the signal line, there is an advantage that it can be easily applied to the existing system.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a POS system to which a remote power supply centralized control device according to an embodiment of the present invention is applied.

FIG. 2 is a diagram showing a configuration of a power supply control device connected to a satellite POS terminal device of the POS system.

FIG. 3 is a diagram showing a configuration of a satellite power supply centralized control device connected to a master POS terminal device of the POS system.

FIG. 4 is a diagram showing an operation flow of a PLU file update process of the POS system.

FIG. 5 is a diagram showing an opening / closing sequence of a relay used in the remote power supply control device.

[Explanation of symbols]

 1 (1-1 to 1-n) -satellite POS terminal device 2 (2-1 to 2-n) -power supply control device 3-satellite power supply centralized control device 4-master POS terminal device 5-data communication line (transmission line) ) 7-Power line

Claims (3)

[Claims] 1. In a system in which a master device and a plurality of satellite devices are connected via a transmission line, when the master device side receives a remote power-on signal from the master device body, the satellite device is connected to the transmission line. A satellite power supply centralized control device that outputs a power supply drive signal is provided, and each satellite device side has a detection unit that detects the satellite device power supply drive signal on the transmission line, and the satellite when the satellite device power supply drive signal is detected. A remote power supply centralized control device comprising a power supply control device including a power-on means for turning on the power supply of the device body. 2. The power supply control device includes means for turning off the power supply of the satellite device body when receiving a power-off signal from the satellite device body.
Centralized control device for remote power supply. 3. The satellite device power supply drive signal is an AC voltage signal, the detection means is a transformer in which a primary winding is connected to a transmission line, and the power supply on means is a secondary of the transformer. 2. The remote power supply centralized control device according to claim 1, which is a relay means for closing the power-on terminal of the satellite device body by the output of the side winding.