JPH09314957A - Printing device - Google Patents

Abstract

(57) Abstract: A printer is initialized from a host device through a communication signal line. In addition, it is possible to set the valid state and invalid state of the function with a switch. A communication signal line from a host device 103
The initialization signal sent through the is converted by the communication unit 104 of the printing apparatus 101 and becomes an input signal to the initialization control unit 109. The initialization control unit controls the control unit 105 according to the state of the input signal, and the printer 101 can be initialized. Further, by providing the setting switch 301 between the communication unit and the initialization control unit, it is possible to set the valid or invalid state of the initialization function.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a printer which is connected to a host device and which receives print data output from the host device and performs a printing process, and more particularly, initializes the printer by a signal from the host device. It relates to a printing device that needs.

[0002]

2. Description of the Related Art In a conventional printing device, an initialization device provided in the printing device only performs initialization when the power is turned on, and it is impossible to initialize the device from the outside.

Further, there has been a method of initializing the state by the control device inside the printer by receiving the initialization command from the host computer.
Initialization cannot be performed when the control device inside the printer is abnormal or when command reception is not possible.
In order to initialize the printer, it was necessary for the operator to turn on the printer again.

[0004]

In order to solve the above-mentioned conventional problems, a printing apparatus of the present invention is a printing apparatus which performs a printing process based on data received from a host apparatus, and a signal transmission from the host apparatus. It is characterized in that it has an initializing means for setting the function and the state of the printing device to the initial state, and that the printing device can be initialized by signal transmission from the host device. According to the above configuration,
If the operation of the host device does not correspond to the initialization function of the printer, the printer may malfunction.
Therefore, in the above-mentioned printing apparatus, by providing the signal transmission mechanism with a switch capable of freely connecting or disconnecting a signal transmission path, the initialization function of the printing apparatus is selected valid or invalid by signal transmission from the host device. It is characterized by

[0005]

BEST MODE FOR CARRYING OUT THE INVENTION An example of an embodiment of the present invention will be described with reference to the drawings.

FIG. 1 is a functional block diagram of a printing apparatus 101 of the present invention. The printer 101 is connected to the host device 103 via a communication signal line 102. Printing device 1
01 is the command transmitted from the host device 103,
It is received by the communication unit 104 and transmitted to the control unit 105.
The control unit 105 analyzes the received command, and the printing unit 10
6. Control the paper feed unit 107 and the operation unit 108.

The initialization control unit 109 monitors the power supplied from the power supply unit 110 and the initialization signal from the communication unit 104, and controls the initialization of the control unit 105 as necessary.

FIG. 2 shows a specific circuit configuration of the communication section 104. The signal transmitted through the communication signal line 102 is processed by the interface IC 201 and converted into an electric signal of a type that can be handled inside the printing apparatus. The converted signal is supplied to the initialization control unit 10 via the initialization control signal line 202.
9 is transmitted.

FIG. 3 shows a specific circuit configuration of the initialization control unit 109. The signal transmitted by the initialization control signal line 202 is connected to the IC 302 via the open / close switch 301. The IC 302 is an IC generally called a reset IC, which monitors the IN input and generates an initialization control signal from the OUT output when the voltage drops below a certain voltage. The IC 302 also monitors the C input, and similarly generates an initialization control signal according to the change in the state of the initialization control signal line 202. The OUT output terminal of the IC 302 is connected to the IC 304 by the initialization control signal line 303. Control unit 105
An IC 304, which is the center of the CPU, is a CPU and controls printing of the printing apparatus according to the present invention. The IC 304 performs an initialization operation according to a change in the state of the initialization control signal line 303 connected to the reset included therein, and then starts the print control operation of the printer according to the initialization sequence.

With the above configuration, the host device 103
By sending an initialization signal through the communication line 102 connected to the printing apparatus 101, the control IC 304 inside the printing apparatus 101 can be initialized, and the printing apparatus 101 can be initialized. Is possible.

The communication signal line 102 is connected to the host device 1.
By utilizing the data communication signal line between the printer 03 and the printer 101, the initialization function according to the present invention can be realized without adding a dedicated communication signal line. However, in the configuration in that case, if the host device 103 does not support the initialization function according to the present invention and issues a signal having a different meaning to the communication signal line 102, the printing device 101 may malfunction. .

According to the configuration of the present invention, the open / close switch 30
1, it is possible to connect or disconnect the transmission path of the initialization control signal, and by setting the initialization control signal line to the disconnection state by the open / close switch 301, the initialization function of the present invention becomes invalid. The malfunction of the printing device can be prevented.

The method of the present invention is also effective in all types of communication modes regardless of the type of communication between the host device and the printing device.

[0014]

EFFECTS OF THE INVENTION Even when the printer is in an error state where it cannot recover itself, or when it is in a state where commands cannot be received, the printer is initialized using the communication signal line from the host device. be able to. Further, by providing a switch in the transmission path of the initialization signal from the host, the printer can enable or disable initialization by the host and prevent malfunction.

[Brief description of drawings]

FIG. 1 is a functional block diagram of a printer according to the present invention.

FIG. 2 is a circuit diagram of a communication unit of the printing apparatus of the present invention.

FIG. 3 is a circuit diagram of an initialization control unit of the printing apparatus of the present invention.

[Explanation of symbols]

 101-Printing device 102-Communication signal line 103-Host device 104-Communication unit 105-Control unit 106・ ・ ・ Printing unit 107 ・ ・ ・ ・ ・ ・ Paper feeding unit 108 ・ ・ ・ ・ ・ ・ Operating unit 109 ・ ・ ・ ・ ・ ・ Initialization control unit 110 ・ ・ ・ ・ ・ ・ Power supply unit 201 ・ ・ ・ ・ ・Interface IC 202 ... Initialization control signal line 301 ... Switch 302 ... Reset IC 303 ... Initialization control signal line 304 ...・ CPU

Claims (2)

[Claims] 1. A printing device for performing printing processing based on data received from a host device, comprising a signal transmission function from the host device and an initialization means for setting the state of the printing device to an initial state. A printing device, which is configured so that the printing device can be initialized by signal transmission from a host device. 2. The printer according to claim 1, wherein the signal transmission mechanism is provided with a switch capable of freely connecting or disconnecting a signal transmission path to enable or disable the initialization function of the printer by signal transmission from the host device. A printing device characterized in that invalid selection is performed.