JPH03252714A - Computer terminal equipment with power source disconnection function - Google Patents

Abstract

PURPOSE:To simplify the handling of a power source by an operator by disconnecting the power source of terminal equipment based on the command of a processing circuit after completion processing is executed based on the command of a power source disconnection reply circuit. CONSTITUTION:When a power source disconnection command signal is inputted to the power source disconnection reply circuit 3 of the terminal equipment 1, the power source disconnection reply circuit 3 outputs a command signal to complete all the processing to the processing circuit 2, and the processing circuit 2 executes all the processing by the signal. When the processing is completed, the processing circuit 2 outputs a power source disconnection command to a power source disconnection circuit 5, and the power source disconnection circuit 5 separates the terminal equipment 1 from the power source 4 by turning off the switch 5a of the circuit. Therefore, when the power source of the main body of a computer center A is disconnected by the operator, the power sources of all the plural terminal equipment 1 located at a place separated from the computer center A are automatically disconnected after the subsequent program processing is completed. In such a way, the handling of the power source by the operator can be simplified.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a terminal device used in a computer system, and particularly to a terminal device connected to a computer center that executes centralized control of various data.

[Prior Art] Conventionally, a computer system has a computer center that files various data and centrally controls this data, and is connected to this computer center via a line, and issues various execution instructions to the computer center. It consists of multiple terminal devices for inputting instructions.

In this computer system, the computer center and each terminal device are generally located at separate locations and each connected to an independent power source.

[Problems to be Solved by the Invention] However, in conventional computer systems, if the power to the computer center is turned off, access operations from the terminal device side cannot be accepted, but when the power to the terminal device is turned off,
Since it is in the N state, the operator may perform an input operation without knowing it. Therefore, when the computer center's power is turned off, the operator must walk around the installation location of each terminal and turn off the power to each terminal.
The disadvantage is that it is very complicated to handle.

[t! Means for Solving the Problem] A computer terminal device with a power cutoff function according to the present invention has the following features:
A terminal device connected to a computer center that performs centralized control of various data, comprising: a power-off response circuit that instructs termination processing within the terminal device in response to a power-off command from the computer center; The terminal device includes a processing circuit that executes termination processing based on a command, and a power cutoff circuit that cuts off power to the terminal device based on a command from the processing circuit after the termination processing is completed.

[Example] Next, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a schematic diagram of a computer system and a terminal device according to the present invention.

In the figure, a computer center A files various data and centrally controls programs, and a plurality of terminal devices 1 are connected by lines. The internal configuration of each terminal device 1 is enlarged and only one is shown, and the terminal device 1 is connected to computer center A based on input data.
A processing circuit (CPU) 2 for exchanging signals with and executing various programs, a power cut response circuit 3 connected to the processing circuit 2 and the line, and a power switch connected to the processing circuit 2 and the power source 4. 5a.

Now, at computer center A, press the power off key (not shown).
When is pressed, a command means (not shown) in the computer center A sends a power cut command signal to each terminal device 1 via the line, and the power of the computer center A is cut off.

When the power cutoff command signal is input to the power cutoff response circuit 3 of the terminal device 1, the power cutoff response circuit 3 outputs a command signal to the processing circuit 2 to end all processing, and the processing circuit 2 responds to this signal. Execute all processing. When the processing is completed, the processing circuit 2 outputs a power-off command to the power-off circuit 5. Based on this command, the power supply cutoff circuit 5 turns off its switch 5a, and the terminal device 1 is disconnected from the power supply 4.

Therefore, when the power to the computer center A is turned off by the operator, all the terminal devices located far from the computer center A are automatically turned off after the subsequent program processing is completed. be done.

[Effects of the Invention] As explained above, the terminal device of the present invention includes a power-off response circuit that responds to a command from a computer center, a processing circuit that executes termination processing based on a command from the power-off response circuit, and a termination processing circuit that responds to a command from a computer center. Since the computer is equipped with a power cutoff circuit that cuts off the power to the terminal device based on a command from the processing circuit after the processing is completed, the power can be cut off automatically in response to the power cut off of the computer center itself. Therefore, there is an effect that the operator can extremely easily handle the power supply.

[Brief explanation of drawings]

FIG. 1 is a schematic block diagram showing an embodiment of the present invention. A... Computer center, l... Terminal device, 2.
... Processing circuit (CPU), 3... Power cutoff response circuit, 4... Power supply of terminal device, 5... Power cutoff circuit, 5
a...Switch.

Claims (1)

[Claims] A terminal device connected to a computer center that performs centralized control of various data, comprising: a power-off response circuit that instructs termination processing within the terminal device in response to a power-off command from the computer center; A power cutoff device comprising: a processing circuit that executes termination processing based on a command; and a power cutoff circuit that cuts off power to a terminal device based on a command from the processing circuit after the termination processing is completed. Functional computer terminal equipment.