JPS62209644A - Program loading system - Google Patents

Abstract

PURPOSE:To reduce the control load of a center equipment and at the same time to contrive the optional designation of a program through a terminal equipment, by designating a program name via the terminal equipment to give a program loading request and then transferring the designated program through the center equipment. CONSTITUTION:For instance, a terminal equipment contains a register means 25 which registers a program name which can identify a terminal number to a storage-protected RAM. Then a registered program name is written to an IPL request telegram and sent to a center equipment. This center equipment analyzes the received telegram for recognizing the terminal number and the program name. Thus the center equipment can immediately read the relevant program out of a file and transfer it. As a result, the control load of the center equipment is greatly reduced since it is just required to register a transferred program to the file. At the same time, the program name can be optionally registered at the side of the terminal equipment. This improves the flexible operation of a program loading system.

Description

[Detailed Description of the Invention] [Summary] In a programmable terminal device that operates by a program transferred from a center device, a program load request is made by specifying a program name from the terminal device, and the center device loads the specified program. This has the effect of reducing the management burden on the center device and allowing arbitrary programs to be specified on the terminal device.

[Industrial application field]

The present invention relates to an improvement in a program loading method for loading a program from a center device to a terminal device.

Conventionally, in terminal devices that operate based on programs transferred from a center device, the center device manages the programs transferred to each terminal.

For this reason, an increase in the number of terminals puts pressure on the resources of the center equipment and increases the burden of management work.

For this reason, the above-mentioned program loading method % formula % [Prior art] Fig. 3 (al) shows a system block diagram, and Fig. 3 (bl) shows a conventional program loading operation flowchart.

In Figure 3 (al), terminals 1 and 2 constitute a workstation that performs various data processing, but they do not have program files and send an initial program load (TPL) request to the center device 3 when the power is turned on. However, it is configured to operate according to the transferred program.

In the center device 3, the programs to be loaded into the terminals 1 and 2 are registered in the program file 4, and as shown in FIG.
As shown in FIG. 1, the terminal number is identified based on the ■PL request message from the terminals 1 and 2, the IPL management table 5 is referred to, the corresponding program is searched, and the program is transferred to the requesting terminal.

In this way, the center device 3 manages transfer programs using the IPL management table 5 that associates terminal numbers and program names, so whenever the number of terminals increases or decreases, the program name changes, etc. 5
will be updated.

[Problem that the invention seeks to solve]

As explained above, in the conventional program loading method, when the number of terminals increases, resources are squeezed for program loading, and the number of terminals increases or decreases.

There was a problem in that management work associated with changing program names, etc. became complicated.

SUMMARY OF THE INVENTION In view of the above problems, it is an object of the present invention to provide a program loading method that reduces the burden on a center device.

[Means for solving problems]

For the above purpose, the program loading method of the present invention, as shown in the principle explanatory diagram of FIG. A means (26) for transmitting a message is provided in the terminal device, and the center device transfers the program specified by the program load request message to the terminal device.

[Effect]

For example, the terminal device is provided with means for registering a program name from which the terminal number can be identified in a protected RAM (random access memory), and the registered program name is written in an IPL request message and sent to the center device.

The center device can recognize the terminal number and program name by analyzing the IPL request message, and can immediately read the program from the file and transfer it.

Therefore, the center device only needs to register the transfer program in a file, which greatly reduces the management burden, and the terminal side can also register any program name, which has the effect of allowing flexible system operation.

〔Example〕

An embodiment of the present invention will be described with reference to FIG.

FIG. 2 (al) shows a program loading operation flowchart, and FIG. 2 (bl) shows a system block diagram showing details of the terminal and center device.

The IPL request message is, as shown in Figure 2(b), ■PL
Message 9a expressing the request and message 9b specifying the program name
The program name is defined to correspond to the terminal number (for example, POI is terminal number 01).

The configuration of the terminal 6 and center device 7 that load programs based on this IPL request message 9 is shown in FIG. 2(b). That is, the terminal 6 has the processor 111 display unit 17 . Key human resources department 1
8, etc., and is operated by a program transferred to the RAM 13. As a program loading means, it is equipped with a registration processing section 15 for registering a program name, a program name memory 14, an IPL request message creation section 82, a communication control section 16, etc. , the center device 7 manages the program file 23゜program file 23 and executes the specified program in RA.
A file management unit 22 that transfers to the M24 and an rPL request processing unit 21 that analyzes the IPL request message and performs load processing.
It is composed of etc.

The terminal 6 and center device 7 configured above are the communication control unit 1
6 and 20, the following program loading operation is performed. [See FIG. 2(a)] (1) The center device 7 performs patrol polling at intervals of several seconds for the terminals 6 that are not powered on.

(2) When the terminal 6 is powered on, each part of the terminal 6 is initialized by the initial setting program stored in the ROM 12, and then a TPL request message is sent to the center device 7.
sent to.

Therefore, the IPL request message creation unit 8 reads the program name memory 14 and creates an IPL request message containing the registered program name.
A request message 9 is created, and the communication control unit 16 transmits it in response to the patrol polling.

(3) When the center device 7 receives this IPL request message 9, 1. The PL request processing unit 21 analyzes the terminal number and program name.

The file management section 22 reads the file with the above program name from the program file 23 and stores it in the RAM 24, and the communication control section 20 transfers it to the terminal 6.

(4) The terminal 6 stores the transferred program in the RAM 13, and thereafter operates the program according to the operator's operations.

Note that the program name is registered by the registration processing unit 15, and the program name input from the key input unit 18 is stored and registered in the battery-supported program name memory 14.

As explained above, since the transfer request program name is specified in the IPL request message and the center device analyzes and transfers it, there is no need for a management table that associates terminal numbers and program names. The management burden on the center device is reduced.

〔Effect of the invention〕

As explained above, the present invention provides a method for loading a program by specifying a program name from a terminal device, which has the advantage of reducing the management burden on the center device and allowing flexibility in dealing with system expansion. is extremely large.

[Brief explanation of drawings]

Fig. 1 is a diagram explaining the principle of the present invention, Fig. 2 (al is a flowchart of program loading operation, Fig. 2 (b) is a system block diagram of the embodiment, Fig. 3 f
8) is a system block diagram, and FIG. 3 fb) is a conventional program loading operation flowchart. In the figure, 1 to 2 are terminals, 3 is a center device, 4 is a program file, 5 is an IPL management table, 6 is a terminal of the embodiment, 7 is a center device of an embodiment, 8 is an IPL request message creation unit, 9 is an IPL request message creation unit IPL request message, 11.19 is processor, 12 is ROM. 13.24 is RAM. 14 is a program name memory, and 5 is a registration processing unit. 16. 20 is a communication control unit, 21 is I P! , a request processing section, 22 a file management section, and 23 a program file.

Claims (1)

[Claims] A program loading method in a terminal device operated by a program transferred from a center device, comprising means (25) for registering a program name, and a program to the center device by specifying the registered program name. A program loading method characterized in that the terminal device is provided with means (26) for sending a load request message, and the center device transfers the program specified by the program load request message to the terminal device.