JPH06195286A - Data communication device - Google Patents

Abstract

(57) [Abstract] [Purpose] It is not necessary to modify the software related to data processing when changing the topology of the network, and it is possible to easily change the structure of the network. [Structure] Apart from the application software of the ROM 3 relating to data processing in the data processing unit 2a of the CPU 2, the EEP shows the relationship between the virtual address converted by the name conversion processing unit 2b and the channel and real address.
It is stored in the ROM 5, and the network interface ch. 0-ch. The names included in the data transmitted and received between n and the data processing unit 2a are mutually converted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data communication device to which a plurality of communication terminal devices are connected via a network interface.

[0002]

2. Description of the Related Art In a data communication device such as a network controller, data is transmitted / received to / from a plurality of communication terminal devices, and data relating to this transmission / reception is processed by a data processing means. When there are a wide variety of communication terminal devices connected to this data communication device, they are classified into a plurality of channels and each channel is connected to the data communication device via a network interface. When transmitting and receiving data between such a data communication device and a communication terminal device, it is necessary to specify the communication terminal device of the transmission / reception destination. Conventionally, a unique identification name is assigned to each of the plurality of communication terminal devices. Had been granted.

In particular, when a network is composed of a plurality of channels, different identification names are given to each network, and each network and communication terminal device have their own processing functions.
The data processing means provided in the data communication device needs to perform data processing after identifying each network (channel) and communication terminal device. Therefore, the application software executed in the data processing means is created by specifying each network and communication terminal device by each identification name.

[0004]

However, in the conventional data communication device, each network or communication terminal device is specified by the identification name in the application software supplied to the data processing means.
When the configuration of the network or communication terminal device connected to the data communication device changes, the application software itself supplied to the data processing means needs to be modified accordingly, and the creation of the application software depends on the network connection form. Will be done,
There is a problem that the network connection form cannot be easily changed.

An object of the present invention is to use a name for specifying each network or communication terminal device in the application software supplied to the data processing means as a virtual name, and the virtual name and the network and communication terminal device actually configured. The relation between the identification name given to each is stored, and when the data is transmitted / received, the identification name of the transmission / reception destination and the virtual name are converted into each other, so that the virtual name can be changed even if the network connection mode is changed. Provided is a data communication device capable of responding only by changing a relationship with an identification name and easily changing a network configuration without requiring modification of application software supplied to a data processing means. To do.

[0006]

A data communication device of the present invention is connected to a plurality of communication terminal devices each having a unique identification name, and processes data transmitted / received to / from the plurality of communication terminal devices. In the data communication device including the data processing unit, the relationship storage unit that stores the relationship between the virtual name of the communication terminal device used during data processing in the data processing unit and the identification name given to the communication terminal device, and the relationship The present invention is characterized in that name conversion means is provided for mutually converting the identification name of the transmission / reception destination and the virtual name when data is transmitted / received based on the relationship stored in the storage means.

[0007]

According to the present invention, the identification name of the transmission / reception destination and the virtual name are mutually converted when transmitting / receiving the data processed by the data processing means of the data communication device. The identification name is a name uniquely assigned to each of the plurality of communication terminal devices, and the virtual name is a name used during data processing by the data processing means. The relationship between the identification name and the virtual name is stored in the relationship storage means. Therefore, even if the connection state of the communication terminal device to the data communication device changes and the relationship between the virtual name and the actual identification name at the time of data processing changes, the virtual name stored in the relationship storage means It is not necessary to change the operation content of the data processing means merely by changing the relationship with the identification name.

[0008]

1 is a block diagram showing a connection state of a communication terminal apparatus to a data communication apparatus according to an embodiment of the present invention. The control unit of the data communication device 1 is composed of a CPU 2 including a ROM 3 and a RAM 4. An EEPROM 5 is connected to the CPU 2 and is connected to a network via a communication control unit 6.

Further, it is connected to each input / output device through the interface 7. The network 11 is configured by branching into a plurality of channels, and the channel interface ch. 0-ch. A plurality of communication terminal devices are connected to each of n. For example, the channel interface ch. 0 to 0 to 0m
Communication terminal device of the channel interface ch. A communication terminal device of 10 to 1 m is connected to 1. The CPU 2 executes a processing operation according to a program written in the ROM 3 in advance. Input / output data relating to the processing operation of the CPU 2 is stored in a predetermined memory area of the RAM 4. Further, the EEPROM 5 stores a relationship between a virtual name and an identification name, which will be described later. This EEPROM 5 corresponds to the relational storage means of the present invention.

FIG. 2 is a diagram showing the relationship between the processing operation of the control unit of the data communication device and data. CPU2 is R
Data processing unit 2a that executes data processing according to application software stored in OM3
And a name conversion processing unit 2b that performs name conversion according to the relationship between the virtual name and the identification name stored in the EEPROM 5. The data created by the virtual name in the data processing unit 2a is converted into the channel and the real address corresponding to the virtual address in the name conversion processing unit 2b, and then supplied to the corresponding channel interface. On the other hand, the data input from any one of the network interfaces is supplied to the data processing unit 2a after the real address included in the data is converted into a virtual address by the name conversion processing unit 2b.

FIG. 3 is a flowchart showing the processing procedure of the control unit of the data communication device. When the CPU 2 generates transmission data to be transmitted in data processing (n
1), the EEPROM 5 is searched for the channel number and the real address corresponding to the virtual address included in the transmission data (n2), and the virtual address of the transmission data is converted to the real address and supplied to the network interface of the searched channel number. Yes (n3). On the other hand, when the data transmitted from the communication terminal device is received (n4),
The EEPROM 5 is searched for a virtual address corresponding to the real address included in the received data, the real address of the received data is converted into the searched virtual address, and data processing is executed (n6).

By the above processing, when transmission data to be transmitted to a specific communication terminal device is generated in data processing, for example, as shown in FIG. 4, a channel number corresponding to the virtual address "20" of the transmission data D1 and Table 21 in which the real address is stored in the EEPROM 5
And the virtual address of the transmission data D1 is converted into the corresponding real address “00”. The converted transmission data D1 'is converted into the network interface ch. Of channel number "1" corresponding to the virtual address. Send to 1. The network interface ch. 1 supplies the transmission data to the communication terminal device 00 specified by the real address.

As described above, according to this embodiment, even if the configuration in the network 11 changes, E
Just by rewriting the relationship between the virtual address and the channel number and the real address stored in the EPROM 5,
Data processing can be executed without modifying the application software stored in the ROM 3, and the network connection form can be easily changed.

The ROM 3 may be composed of a rewritable non-volatile memory, and a part of the ROM 3 may store the relationship between the virtual address, the channel number and the real address. In this case, the EEPROM 5 becomes unnecessary.

[0015]

According to the present invention, it is possible to cope with a change in the network connection form without changing the operation of the data processing means of the data communication device, and to increase or decrease the number of connected networks, and There is an advantage that structural changes in the network such as the relocation of communication terminal devices in the network can be easily performed.

[Brief description of drawings]

FIG. 1 is a block diagram showing a connection state of a data communication device according to an embodiment of the present invention.

FIG. 2 is a diagram showing a relationship between processing and data in a control unit of the data communication apparatus.

FIG. 3 is a flowchart showing a part of a processing procedure in the control unit.

FIG. 4 is a diagram showing a specific example of a name conversion operation at the time of data transmission in the control unit.

[Explanation of symbols]

 1-Data communication device 5-EEPROM (relational storage means) 11-Network ch. 0-ch. n-network interface 00-nm-communication terminal device

Claims (1)

[Claims] 1. A data communication apparatus comprising: a plurality of communication terminal apparatuses, each of which is provided with a unique identification name, and a data processing unit for processing data transmitted to and received from the plurality of communication terminal apparatuses. Relationship storage means for storing the relationship between the virtual name of the communication terminal device used at the time of data processing in the data processing means and the identification name given to the communication terminal device, and of the data based on the relationship stored in the relationship storage means. A data communication device comprising name conversion means for mutually converting an identification name of a transmission / reception destination and a virtual name at the time of transmission / reception.