JPH0566859A - Data processing system - Google Patents

Abstract

PURPOSE:To provide the data processing system in which a system control part of a main body stops a power supply to an auxiliary device when the auxiliary device causes a malfunction and resumes the supply of power after a prescribed time elapses. CONSTITUTION:The system is provided with a power source switch part 4 which contains a switch 6 interposed in a power source line 8 connected to an auxiliary device 5 from a system control part 3 of a main body 1, and an opening/closing control part 7 for turning-on/turning-off the switch 6 when a turn-on/turn-off command from the system control part 3 is received. When a malfunction of the device 5 is detected, the system control part 3 sends out a turn-off command signal to the opening/closing control part 7 to turn off the switch 6, sends out a turn-on command signal to the opening/closing control part 7 after the lapse of a prescribed time to turn on the switch 6, and resumes the device 5, therefore, a system stop caused by a malfunction of the device 5 does not occur.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data processing system, and more particularly to a data processing system having an auxiliary device supplied with power from a main body.

[0002]

2. Description of the Related Art Conventionally, this type of data processing system has been
For example, the main body of a POS system and an auxiliary device such as a bar code reader are composed of the main body and the auxiliary device, and the power supply unit is usually mounted only in the main body, and the auxiliary device is supplied from the main body. It has become so.

FIG. 2 is a block diagram showing a connection relationship between a main body of this type of conventional data processing system and an auxiliary device.

The main body 11 includes a system control section 13 and a power supply unit section 12, and is connected to the accessory device 15 by a connection line 18 including a control line and a power supply line, and the system control section 13 is connected.
Controls the accessory device 15 via an interface such as RS-232C or Centronics interface,
Power supply is also included.

[0005]

In the conventional data processing system described above, when the accessory device malfunctions, the power of the main body is turned off in order to turn off the power of the accessory device.
It must be set to F, so the power supply for the main unit is also O
This results in FF, data processing is interrupted on the way, and for that reason, the operator has to directly operate the switch of the power supply.

An object of the present invention is to eliminate the above-mentioned drawbacks, and when the auxiliary device malfunctions, the system control unit automatically turns on / off the power supply to the auxiliary device, and the data processing which does not cause the system down due to the malfunction of the auxiliary device. It is to provide a system.

[0007]

In the data processing system of the present invention, a switch for turning on / off a connection between a main body and an auxiliary device and a switch for turning on / off the switch are controlled by a system control unit included in the main body. An open / close control unit that turns off.

[0008]

When the system controller detects a malfunction of the accessory device by providing a switch on the power line between the main body and the accessory device and an opening / closing controller for the switch,
The system control unit turns off the switch via the opening / closing control unit.
As a result, the power supply to the auxiliary device is once stopped, and the switch is turned on again after a predetermined time, so that the recovery can be automatically performed.

[0009]

Embodiments of the present invention will now be described with reference to the drawings.

1 (a) and 1 (b) are a block diagram of an embodiment of a data processing system of the present invention and a detailed block diagram of a power supply switch section, respectively.

This data processing system has a main body 1 including a power supply unit section 2, a system control section 3 and a power supply switch section 4, an auxiliary device 5, a power supply line 8 connecting them, and a control line 9. The power switch unit 4 has a switch 6 for turning ON / OFF a power line 8 for supplying power from the main body 1 to the accessory device 5, and an opening / closing control unit 7 for controlling ON / OFF of the switch 6 according to a command from the system control unit 3. . The system control unit 3 controls the entire system, and particularly when the malfunction of the accessory device 5 is detected, the open / close control unit 7 is switched to the switch 6
Is turned off, and after a predetermined time, turned on. Further, when a failure of the accessory device 5 is determined by repeating this OFF / ON, the failure is displayed while the OFF instruction is given. The power supply unit 2 is a commercial power supply, for example, AC100.
Converts V to various DC power supplies + 5V and outputs.

Next, the operation of this data processing system will be described. When the data processing system is activated, the system control unit 3 sends a command signal for turning on the switch 6 to the opening / closing control unit 7. In response to this, the opening / closing control unit 7 transmits a signal for turning on the switch 6 to the switch 6, and the switch 6 turns on the switch. After that, the accessory device 5 starts operating, and the data input by the accessory device 5 is transferred to the control unit 3.
Send to. Next, when the accessory device 5 causes some malfunction, the system control unit 3 detects this malfunction and sends a command signal for turning off the switch 6 to the opening / closing control unit 7. In response to this, the opening / closing control unit 7 transmits a signal for turning off the switch 6 to the switch 6, and the switch 6 turns off the switch.
FF is set, and the operation of the accessory device 5 is stopped. Then, after a predetermined time, the system controller 3 opens and closes the controller 7.
A command signal for turning on the switch 6 is issued to the open / close control unit 7, and the switch 6 turns on. By these operations, the accessory device 5 is returned to the initial state and the accessory device 5
To recover.

In the above embodiment, the power switch section 4 is provided in the main body 1, but the power switch section 4 may be provided outside the main body or in the accessory device 5.

[0014]

As described above, according to the present invention, when the accessory device malfunctions, the power switch inserted between the system controller of the main body and the accessory device is controlled to be opened and closed by the system controller of the main body. The effect is that the auxiliary device is automatically restored without interrupting data processing.

[Brief description of drawings]

FIG. 1A is a block diagram of an embodiment of a data processing system of the present invention, and FIG. 1B is a detailed block diagram of a power switch unit.

FIG. 2 is a block diagram showing a connection between a main body of a conventional data processing system and an accessory device.

[Explanation of symbols]

 1 main body 2 power supply unit section 3 control section 4 power supply switch section 5 accessory device 6 switch section 7 opening / closing control section 8 power supply line 9 control line

Claims (1)

[Claims] 1. A data processing system comprising a main body including a system control unit and an auxiliary device for input / output, a switch for turning on and off a connection between the main body and the auxiliary device, and a system included in the main body A data processing system, comprising: an opening / closing control unit that turns on and off the switch under the control of the control unit.