JPS60198936A - Device address managing system - Google Patents

Abstract

PURPOSE:To prevent a fault due to duplicated address by providing a device address managing station in a network and allowing each station to execute the registration and change of the address to the managing station to manage address information through the management station. CONSTITUTION:A system (#0)1 of the device address management system consists of the address management station 4, work stations 5-7 and an interface cable 10. Further, a system (#1)2 consists of work stations 8-9 and the cable 10 and the cable 10 of the systems 1, 2 is connected by an inter-system connector 3. Station addresses (1-N; integer) are given to the stations 5-9, which execute the registration and change of the own address to the address management station 4. Then the active address and the address before change of the stations 5-9 are stored as a table and the address change information responds to an inquiry of the stations 5-9.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Application of the Invention] The present invention is applicable to a device address management system for a network system including a plurality of workstations, particularly to the relocation of a workstation.

Concerning automation of address management.

[Background of the invention]

Conventionally, in a network of systems including a plurality of workstations, when one workstation in a particular system is relocated to another system and the device address of the workstation is changed, the network itself A power that has no means of recognizing that change information).

Therefore, recognition of change information must rely on communication between the users of the workstations.

This was a major problem in system operation. Further, even if a device address is duplicated in two or more workstations, the workstations have no means to recognize this, which has also been a cause of system failure.

[Purpose of the invention]

SUMMARY OF THE INVENTION An object of the present invention is to provide a device address management method for recognizing within the network information on device address changes caused by movement of workstations between systems in a network of systems including a plurality of work stages. .

[Summary of the invention]

For convenience, a device address management station is set up in the network, and each workstation registers and changes its own address to the address management station. This allows address change information to be used for device address management. It is managed at the station and responds with address change information when the workstation makes arrangements.

Workstation movement information can now be recognized by the network itself.

[Embodiments of the invention]

The figure is an example of a network of systems including a plurality of workstations, where system +-01 is comprised of address management station 4 and workstations 5.6.7, and system +1.2 is comprised of workstations 8. Consisting of 9.

Further, system≠0.1 and system Φ1.2 are connected by an intersystem connection device 3.

Each workstation 5, 6, 7, 8.9 has a (integer) station address from 1 to N, as shown in FIG. It is also assumed that the address management station 4 has a unique address in the network itself.

The device address of a workstation within the network is determined uniquely within the network by the system address and the station address.

Next, a method for registering, changing, and matching device addresses will be explained. In addition, these are interface cable 1
0. This is realized by communication via the inter-system connection device 5, but since the present invention is not concerned with these communication rules, a detailed explanation will be omitted.

However, the network has a means for confirming that the data transmitted by the transmitter has been received by the receiver.

First, when the system is initialized, each workstation 5
, 6, 7, 8.9 report the system na and their own station address to the address management station 4. The address management station 4 has an address management table as shown in Table 1, in which the reported device address is:

The address is checked by referring to the management table to see if it is duplicated with the device address of another workstation. If it is not duplicated, it is registered on the address management table. Also, if there are duplicates.

A device address change registration request is issued to two workstations with duplicate device addresses. In this case, the address tube/ring table is not updated.

Second, regarding the device address change, work stage 3 and 7 will change from System+, 0, 1 to System+1.2.
An example will be explained in which the station controller address in the system is changed at the same time. In this case, the workstation 7 reports to the address management station 4 the system number and stage address after relocation, and the system Φ and station address before relocation. At this time, the address management station 4 registers the device address on the address management table if there is no overlap with the device address of other workstations as described above. At the same time, as shown in Table 1, the device address before change is also held in the address management table.

In order to simplify the explanation, it is assumed that a device address that has been used once within the network will not be reused.

Fifth & C, device address alignment will be explained. As an example, workstation 5 is work stage w 7
In contrast to 7, consider a case where information transmission, such as e-mail, is carried out on a regular basis.

Since the workstation 5 is not aware of the relocation of the workstation 7, it transmits information to the address of the workstation 7 before the relocation. However, since the device address of the receiving workstation 7 has been changed and there is no workstation with that address in the network, the workstation 5 recognizes that the transmitted information has not been received. This is K
Therefore, workstation 5 is.

The address management station 4 sets the device address of the workstation 7 to the address management station 4.
The current device address of the workstation 7 is notified to the workstation 5 by referring to the current device address and the pre-relocation device address recorded on the address management table. This K enables the workstation 5 to transmit information to the workstation 7.

Table 1 [Effects of the Invention] As described above, according to the present invention, in a system network including a plurality of workstations, when a workstation is moved between systems, device address change information is transmitted to all workstations in the network. can be recognized, and also has the effect of preventing system failures due to duplication of device addresses within the network.

[Brief explanation of drawings]

The figure is a system diagram of an embodiment of the present invention. 1... System na 0° 2...System +1° 5...System r'I! J connection device. 4...Address management station. 5... Work station. Representative Patent Attorney Akio Takahashi

Claims (1)

[Claims] 1. In a network in which a plurality of workstations are connected in a bus structure or a ring structure, and systems to which the plurality of workstations are connected are connected via an intersystem connection device. , providing one or more device address management stations within the network. Each workstation registers and changes its own address to the address management station, and the address management station maintains the current address of each workstation and the address immediately before the change as a table. It is characterized by responding with device address change information in response to an arrangement. Device address management method.