JPH0454647A - Remote maintenance control system - Google Patents

Abstract

PURPOSE:To exactly execute the remote maintenance by closing a file and a circuit which are being used, and executing IPL again, when a terminal controller interprets a command, and finds that it is a code that instructs reexecution of the IPL. CONSTITUTION:In a terminal controller (TCE) 10, a destination in a received telegraphic message from a center 20 is decided, and in the case it is addressed to a terminal equipment, it is outputted as it is to the terminal equipment 30 through a communication channel 51. On the other hand, when the telegraphic message is addressed to the TCE 10, consequently, whether the command instructs IPL or not is decided. In the case the command does not instruct the IPL, each processing is executed, but in the case the command instructs the IPL, first of all, all files and all circuits held by the TCE 10 are closed. Thereafter, a memory dump processing is executed in order to obtain necessary information to a tile device 11, and at the time point when these processings are all finished, the re-IPL is performed. As a result, the remote maintenance of an on-line system can be performed exactly.

Description

DETAILED DESCRIPTION OF THE INVENTION [Industrial Field of Application J] The present invention relates to a remote maintenance control system, and particularly to a remote maintenance control system that enables accurate remote maintenance.

[Conventional technology]

Conventionally, as a remote maintenance control method for an online system, a method is known in which a terminal device equipped with a test program is tested from a remote device, as disclosed in, for example, Japanese Patent Application Laid-Open No. 233529. .

However, although this method can isolate the faulty part, it is functionally only a test as the name suggests, and can only be used as a basic countermeasure. must be carried out. In reality, many hardware failures are temporary, and in many cases recovery can be achieved simply by performing a re-IPL, so this has the problem of being a waste of effort in many cases. In order to solve this problem, a method has been proposed in which the maintenance panel is operated from a remote device, as disclosed in Japanese Unexamined Patent Publication No. 1-246641.

On the other hand, regarding software failures such as malfunctions caused by program bugs, methods for self-detecting program loops as disclosed in Japanese Unexamined Patent Publication No. 1-241637, and systems as disclosed in Japanese Unexamined Patent Publication No. 1-229336 are available. A known method is to perform a self-IPL (initial program load) when a downtime is detected.

[Problems to be Solved by the Invention] The above-mentioned conventional techniques each have the following problems.

That is, the method disclosed in Japanese Unexamined Patent Publication No. 1-246641, in which the maintenance panel is operated from a remote device, requires a dedicated separate processor for that purpose.
This is a serious problem.

Also, JP-A-24]-637, JP-A]-2293
Although the method disclosed in Publication No. 36 is effective against software failures that can be detected, it is not effective against software failures that do not cause loops or when a certain bow simply malfunctions. The problem is that there is no such thing. Furthermore, in reality, it is also true that failures such as the latter mentioned above occur frequently.

Although in general, software failures can often be recovered by simply performing 1PL again, the current situation is that maintenance personnel are dispatched to perform IPL even in such cases, and the above-mentioned problems are currently being resolved. There are situations in which people are not recognized.

In addition, in the future, terminal devices will be installed in places where the amount of light installed will increase even further, and terminal devices will be installed in places that are closed off at night and cannot be accessed by people, or where special permission is required to enter. There was also a lack of consideration given to the situation in which the facility was installed.

The present invention has been made in view of the above circumstances, and its purpose is to solve the above-mentioned problems in the conventional technology, to enable remote instruction for re-IPL in an online system, and to provide remote maintenance. The object of the present invention is to provide a remote maintenance control system that enables accurate maintenance.

[L Stage for Solving the Problems] The above object of the present invention is to provide a remote maintenance control method for an online system comprising a central processing unit, a terminal device, and a terminal control device that controls the terminal device, in which the transmission from the central processing unit is performed. Define a command addressed to the terminal control device in the message to be sent, provide a code for instructing the terminal control device to re-IPL, and provide a function to interpret the command in the terminal control device. As a result of interpreting the command in the terminal control device that received the command, if the command is a code that instructs re-IPL execution, it indicates that the system is configured to perform re-IPL after closing the files and lines in use. This is achieved by a featured remote maintenance control system.

[Operation] With the remote maintenance control system according to the present invention, configured as described above, the re-IPL of the terminal control device can be instructed from the center having the central processing unit, so remote maintenance can be performed without requiring the dispatch of maintenance personnel. This has the effect of providing a remote maintenance control system that enables accurate maintenance.

〔Example〕

Embodiments of the present invention will be described in detail below with reference to the drawings.

FIG. 2 is a configuration diagram of an online system showing one embodiment of the present invention, in which 10 is a terminal control device (hereinafter referred to as r
11 is a file device, 20 is a center having a central processing unit, and 30 is a terminal device.

In addition, 50 is a line connecting between the center and TCEIO, and 5
I indicates a communication path connecting between TCEIO and the terminal device 30.

FIG. 3 shows a message sent from the center 20 to the TCEIO. Figure (a) shows the overall structure of the message;
Figure (b) is a diagram illustrating the contents of the destination column;
c) is a diagram illustrating the contents of the command field.

Hereinafter, the operation of this embodiment configured as described above will be explained in detail based on the operation flowchart shown in FIG.

As mentioned above, the TCEIO is connected to the center 20 via the line 50.
It is further connected to a terminal device 30 via a communication path 5. Note that the center 20 is installed in a remote location and is configured to be able to give various instructions to the TCE 0 and the terminal device 30 by sending messages via the line 50. There is.

The operation flowchart shown in FIG. 1 shows the operation of the program in TCEIO, and the operation flowchart shown in FIG.
The message received from the center 20 is being processed.

First, it is shown in FIG. 3(a). The destination in the message received from the center 20 is determined (step 41), and if it is addressed to a terminal device, it is output as is to the terminal device 30 via the communication path 51 (step 47). If the command is directed to TCEIO, then it is determined whether the command instructs IPL (step 42).

If the command does not instruct IPL, each process is executed (step 48), but if the command instructs IPL, first step 48 closes all files held by TCEIO. 43) In addition, all lines owned by Ding CEIO will be closed (
Step 44). After that, save the necessary information to a file [1
Step 45). When all of these processes are completed, re-I
It is now time to perform PL (step 46).

In the above embodiment, before performing re-IPL, TC
Since all files and lines held by the EIO are closed, file destruction due to forced termination can be prevented, and appropriate instructions can be given to the operator. Furthermore, since a memory dump is executed, there is an advantage that it is possible to save various information for finding the root cause of software failures.

The remote maintenance control method for the online system as described above is
In the future, terminal equipment will be installed in places where the amount of light installed will increase more and more, and where the terminal equipment will be closed off at night, making it impossible for people to enter, or where special permission will be required for entry. If a situation arises in which the equipment is installed in
This is particularly effective.

〔Effect of the invention〕

As described in detail above, according to the present invention, in a remote maintenance control method for an online system consisting of a central processing unit, a terminal device, and a terminal control device that controls the terminal device, in a telegram transmitted from the central processing unit. A command addressed to the terminal control device is defined, a code for instructing re-IPL execution directed to the terminal control device is provided in the command, and a function for interpreting the command is provided in the terminal control device,
As a result of interpreting the command in the terminal control device that received the message, if the command is a code that instructs re-IPL execution, it is configured to close the files and lines in use and then execute re-IPL. This brings about the remarkable effect that it is possible to realize a remote maintenance control system that makes it possible to perform remote maintenance accurately.

[Brief explanation of the drawing]

FIG. 1 is a flowchart showing the operation of a program in the TCH of an online system showing an embodiment of the present invention;
FIG. 2 is a block diagram of the online system of the embodiment, and FIG. 3 is a diagram showing a message sent from the center to the TCE. 10: TCE, +1 near fill device, 2o: center, 3
Ejection terminal device, 41-48 Processing step, 5o: Line connecting between center and TCE, 5]: Communication path connecting between TCE and terminal device. Figure (a) Figure (a)

Claims (1)

[Claims] 1. In a remote maintenance control method for an online system consisting of a central processing unit, a terminal device, and a terminal control device that controls the terminal device, a command addressed to the terminal control device is defined in a message sent from the central processing unit, A code is provided in the command to instruct re-IPL execution to the terminal control device, and a function to interpret the command is provided in the terminal control device, and as a result of interpreting the command in the terminal control device that received the message, the command 1. A remote maintenance control system characterized in that, when the code is a code instructing re-IPL execution, files and lines in use are closed and then re-IPL is executed.