JPS6347177B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a data communication system, and more particularly to a data communication system that has a remote power control function and reduces power consumption when a terminal device is inactive.

2. Description of the Related Art Conventionally, data communication systems have been known that have a so-called remote power control function that turns on and off the power of terminal devices based on commands from a center. However, in such a data communication system, it is necessary to keep the transmission control device, etc. of the terminal device constantly operating in order to receive power-on commands from the center even when the terminal device's power is cut off. There was an inconvenience that power was wasted.

In view of the above-mentioned problems with the conventional type, an object of the present invention is to include information regarding the power-on time in a power-off command message from a center in a data communication system having a remote power control function, and to use this information to Based on the idea of presetting the timer of a terminal device, the present invention aims to reduce the power consumption of a terminal device when it is inactive by using simple hardware.

The present invention provides a data communication system having a remote power control function, in which a power-off command message sent from a center to a terminal device includes information regarding the next power-on time as data, and the terminal device is always A timer that is supplied with power is provided, and when the terminal device receives the power-off command message, it presets the power-on time in the timer based on the data, shuts off the power to the terminal device, and executes the power-on time using the timer at the power-on time. It is characterized by turning on the power of the terminal device.

Embodiments of the present invention will be described below with reference to the drawings.
FIG. 1 schematically shows a data communication system according to an embodiment of the present invention. The data communication system in the figure consists of center 1, a modem (modulator/demodulator) on the center side,
2, a terminal side modem 3 connected to the center side modem 2 via a communication line, and a terminal device 4. Although only one terminal device is shown in the figure, normally a plurality of terminal devices are connected to one center 1. Further, the data communication system shown in the figure includes, for example, a banking system, in which case an automatic deposit machine, a payment machine, etc. are connected as the terminal device 4.

In the data communication system shown in FIG. 1, various data are exchanged between a center 1 and a terminal device 4, and the center 1 centrally processes information from each terminal. The center 1 also cuts off the power to the terminal device 4 by sending a power-off command message to the terminal device 4, and uses the power-on time information in the power-off command message to preset a timer in the terminal device 4 for a predetermined period of time. The power can be turned on.

FIG. 2 shows the format of the power-off command message. As is clear from the figure, the power-off command message includes a text start character STX, an address that identifies each station to which the message is to be sent, for example, each branch of a bank, that is, a station address SA, and each terminal within the station to which the message is to be sent. Device address, unit address UA, power-off command unit
Consists of POF, power on time data ONT, and text termination part ETX. Further, the power-off command section POF and the power-on time data ONT together constitute a text section TXT.

The format of the power-off command message in Figure 2 is JIS.
Although it follows the basic data transmission control procedure,
In the present invention, the text part of the command message
Data regarding the next time to turn on the power is added to the TXT along with the power off command. In this case, the data may be, for example, information regarding the next time when the power is to be turned on, or information regarding how many hours later the power is to be turned on.

FIG. 3 shows a schematic configuration of a terminal device in a data communication system according to an embodiment of the present invention.
The terminal device 4 in FIG. 3 includes a receiving circuit 11, a receiving buffer 12, a determining circuit 13 for determining the content of a received data signal, a register 14, a timer 15, a timer power source 16 which is always turned on, and a main body power source 1.
7, an information processing device 18, and an input/output device 19 such as a key input means or a cash card reader.

The operation of the terminal device shown in FIG. 3 will be explained using the flowchart shown in FIG. 4. The message received by the terminal device 4 from the message waiting state is amplified in the receiving circuit 11 and then temporarily stored in the receiving buffer 12. The message in the reception buffer 12 is judged from the unit address UA input to the discriminating circuit 13 as to whether it is data to be transmitted to the own station, and if it is not data to the own station, the process returns to the state of waiting for a message. If the data is for the own station, it is determined whether or not it is a power-off command, and if it is not a power-off command, normal processing is performed by the information processing device 18, input/output device 19, etc. If it is a power-off command, it is determined whether or not there is power-on time data ONT during the power-off command, and if the power-on time data
If there is an ONT, the data ONT is stored in the register 14. Next, in response to a power-off command from the discrimination circuit 13, the power supply to the main body power supply 17 is cut off. The timer 15 increments a built-in timer counter by a predetermined clock until the time preset in the register 14 is reached in response to a timer start command from the discrimination circuit 13. When the preset time comes, the timer 15 sends a power-on command to the main body power supply 17 to turn on the power. Note that if there is no power-on time data ONT during the power-off command, the timer is started based on the data stored in the register 14 according to the previously received command. this is,
When the power on time data ONT is changed,
For example, this is so that the power-on time data ONT need only be included in the power-off command only when the bank's business hours change.

In the above embodiment, each unit address
Although each UA, that is, each terminal device, is instructed to turn off and on the power individually, it is also possible to use general polling to turn off and on all the terminal devices in one station at the same time.

As described above, according to the present invention, by using simple hardware such as a timer, a register, and a power supply for the timer, it is possible to turn on the power of the terminal device in response to a command from the center.
While the terminal device is at rest, it is necessary to supply power only to the timer and register, so that the power consumption of the terminal device when it is at rest can be reduced.

[Brief explanation of the drawing]

FIG. 1 is a block circuit diagram showing a schematic configuration of a data communication system according to an embodiment of the present invention, and FIG.
Figure 4 is a format diagram showing the configuration of a power-off command used in the data communication system of Figure 1, Figure 3 is a block circuit diagram showing a terminal device in the data communication system of Figure 1, and Figure 4 is 2 is a flowchart for explaining the operation of the terminal device. 1... Center, 2, 3... Modem, 4... Terminal device, 11... Receiving circuit, 12... Receiving buffer, 13... Discrimination circuit, 14... Register, 15
...Timer, 16...Power supply for timer, 17...Main power supply, 18...Information processing device, 19...Input/output device.

Claims (1)

[Claims] 1. In a data communication system with a remote power control function, information regarding the next time to turn on the power is included in the power-off command message sent from the center to the terminal device as data, and the terminal device is constantly supplied with power. A timer is provided, and when the terminal device receives the power-off command message, it presets the power-on time in the timer based on the data, shuts off the power to the terminal device, and uses the timer to turn on the terminal device at the power-on time. A data communication system characterized by turning on the power.