JPH03116340A - Terminal program maintenance device - Google Patents

Abstract

PURPOSE:To perform the maintenance of a program immediately at the time of detecting the abnormal state of a terminal equipment by controlling the central arithmetic processing control part of the terminal equipment based on a prescribed code string to read out and write internal information in a program memory and a central arithmetic processing part. CONSTITUTION:A communication control part 11 converts the signal inputted from a host device 20 through a transmission line 41 to code data and sends it as a code string to a terminal equipment 30 through a terminal connection part 12. The code string of the communication control part 11 is sent to a code detecting part 13, and this part 13 detects the code string. Based on this prescribed code string, a maintenance control part 14 controls read and write of internal information in the program memory and the central arithmetic processing circuit from and to a central arithmetic processing control part 21 in the terminal equipment 20. Thus, the maintenance of the program is performed immediately at the time of detecting the abnormal state of the terminal equipment, and a peripheral device for maintenance is not required for each terminal equipment.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention is applied to a terminal program maintenance device for a terminal device in a remote location. In particular, programs for terminal devices that are connected online to host devices using communication lines, and programs for remote terminal devices that control the reading and writing of internal information from the internal signal path of the central processing circuit of the terminal device. It is related to maintenance.

〔overview〕

The present invention is a terminal program maintenance device that is provided between a transmission line and each terminal device, detects a predetermined code string for the own terminal device using a call code string in a transmission procedure from a host device as a keyword, By controlling the central processing control section of the own terminal device based on the code string to read and write internal information in the program memory and central processing section, the system can immediately respond when an abnormal state of the terminal device is detected. This allows program maintenance to be performed and eliminates the need for maintenance peripheral equipment for each terminal device.

[Conventional technology]

Conventionally, in the case of an abnormal condition occurring in an individual terminal device, a terminal program maintenance device has maintenance personnel on-site reading the internal information of the terminal device's central processing circuit or writing a revised program. was performing maintenance.

[Problem that the invention seeks to solve]

However, with such conventional terminal program maintenance equipment, it takes a lot of time for maintenance personnel to grasp and understand the phenomenon on-site and perform program maintenance after an abnormal condition is detected in the terminal device. There was a drawback. Furthermore, in order to investigate the cause of the abnormal state, each terminal device requires a peripheral device such as a printer and a floppy disk for recording the cause of the abnormal state.

The present invention solves the above-mentioned drawbacks, and allows program maintenance to be performed in a short time when an abnormal state of a terminal device is detected, and does not require peripheral equipment for maintenance for each terminal device. The purpose is to provide a terminal program maintenance device.

[Means for solving problems]

The present invention includes a line control unit that encodes a signal input from a host device via a transmission line, converts the code string into a signal, and sends it to the host device; a terminal connection section that supplies a code string from the external input/output port section to the human output port section to the line control section; and a code string that detects a predetermined code string for the own terminal device from the code string from the line control section. a detection unit, and a maintenance control unit that controls reading and writing of internal information in the program memory and the central processing circuit to the central processing control unit in the own terminal device based on the detected predetermined code string. It is characterized by having the following.

[Effect]

The line control section is connected to the host device via a transmission line, encodes the signal from the host device, converts the code string from the terminal connection section into a signal, and sends the signal to the host device.

The terminal connection section provides the code string from the line control section to the external input/output port section of its own terminal device, and provides the code string from the external input/output port section to the line control section. The code detection section detects a predetermined code string for the own terminal device from the code string from the line control section. Based on the detected predetermined code string, the maintenance control section controls the central processing control section within the own terminal device to read and write internal information of the program memory and the central processing circuit. By the above-described operation, maintenance of the program can be performed immediately when an abnormal state of the terminal device is detected, and it is possible to eliminate the need for maintenance peripheral equipment for each terminal device.

〔Example〕

Embodiments of the present invention will be described with reference to the drawings. 1st
The figure is a block diagram of a terminal program maintenance device according to an embodiment of the present invention. In FIG. 1, the terminal program maintenance device runs from the host device 20 to the transmission line 41.
A line control unit 11 encodes a signal input manually via a line adapter bus 42, converts the code string into a signal, and sends it to the host device 20. A line control unit 11 sends the code string from the line control unit 11 to the terminal device of the own device via a line adapter bus 42. 30 and a terminal connection unit 12 which supplies the code string from the external input/output port unit 31 to the line control unit 11; The code detection unit 13 detects the sequence, and the central processing control unit 22 in the terminal device 30 controls reading and writing of internal information in the program memory and the central processing circuit based on the detected predetermined code string. The maintenance control unit 14 is provided for controlling the maintenance control unit 14.

The operation of the terminal program maintenance device having such a configuration will be explained. FIG. 2 is a block diagram of a data multiplication device in which the terminal program maintenance device of the present invention is connected to a plurality of terminal devices, respectively. FIG. 3 is a flowchart showing the operation of the terminal program maintenance device of the present invention.

In FIGS. 1 and 3, the line control unit 11 converts a signal input via the transmission line 41 into code data,
It is sent as a code string to the external input/output port section 31 of the terminal device 30 via the terminal connection section 12 and the line adapter bus 42. The code string from the line control section 11 is sent to the code detection section 13. The code detection unit 13 performs 1. Code string detection is performed using a call code string in the transmission procedure as a keyword. Based on this predetermined code string, the maintenance control section 14 connects the internal data bus 43 connected to the central processing control section 32 in the terminal device 30.
The reading and writing of internal information in the program memory and central processing circuit is controlled through the CPU.

In this way, as shown in FIG. 2, the host device 20 has multiple terminal program maintenance devices 108 to ION.
is connected, and by setting the call code etc. corresponding to each terminal device 30A to 3ON as a keyword,
Perform program maintenance for any terminal device.

For example, in the case of the call code of keyword A in host device 20, terminal device 30A is selected, and keyword C
In this case, the terminal device 30C is selected, and program maintenance for each terminal device can be performed.

〔Effect of the invention〕

As explained above, the present invention has the excellent effect that maintenance of a program can be performed immediately by selecting one of a plurality of terminal devices from a host device, and that peripheral equipment is not required for each terminal device. be.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a terminal program maintenance device according to an embodiment of the present invention. FIG. 2 is a block diagram of a data communication device in which a terminal program maintenance device of the present invention is connected to a plurality of terminal devices. FIG. 3 is a flowchart showing the operation of the terminal program maintenance device of the present invention. 10.10A~ION... Terminal program maintenance device, 11... Line control unit, 12... Terminal connection unit, 13... Code detection unit, 14... Maintenance control unit, 20
... Host device, 30. 30A to 30C ... Terminal device, 31 ... External input/output port section, 32 ... Central processing control section, 41 ... Transmission line, 42 ... Line adapter Bus, 43...internal data bus.

Claims (1)

[Claims] 1. A line control unit that encodes a signal input from a higher-level device via a transmission line, converts the code string into a signal, and sends it to the higher-level device; a terminal connection section that supplies an external input/output port section of the terminal device and supplies a code string from the external input/output port section to the line control section; and a predetermined code string for the own terminal device from the code string from the line control section. and a code detection unit that detects the predetermined code string detected, and controls the reading and writing of internal information in the program memory and the central processing circuit to the central processing control unit in the own terminal device based on the detected predetermined code string. A terminal program maintenance device characterized by comprising a maintenance control section for performing maintenance.