JPH08223178A - Local area network equipment - Google Patents

Abstract

PURPOSE: To easily manage the connection conditions of terminal equipments corresponding to the addition and relocation of the terminal equipments by setting a number for indicating the arrangement position of the terminal equipment in an address, referring to the addresses set to right and left adjacent terminal equipments and automatically allocating the address of the added terminal equipment when adding the terminal equipment. CONSTITUTION: Three digits 101, 102, 201, 202... for indicating the serial numbers of floors and the floors are stored as the addresses of the terminal equipments in a terminal equipment address table inside the storage part 11 of a monitoring device 1 and the arrangement positions of the terminal equipments are acknowledged and the connection conditions are managed by the addresses. In the case of adding the terminal equipment 3, the CPU 30 of the terminal equipment 3 inquires of the addresses of the right and left adjacent terminal equipments and informs the monitoring device 1 of the addresses through a communication control part 34. The CPU 10 of the monitoring device 1 allocates the address to the added terminal equipment 3 based on the informing, informs the added terminal, equipment 3 of the address, updates the serial number and stores it in the terminal equipment address data table inside the storage part 11.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a local area network (Local Area Network) in which a plurality of terminals are connected to a monitoring device by a multi-drop method via a transmission line.
The present invention relates to an area network (LAN) device, and particularly, as an access control method, CSMA / CD (Carrier Sense).
Multiple Access with Collision Detection) method L
It is suitable for application to AN, and relates to an address setting technique of a terminal in the LAN.

[0002]

2. Description of the Related Art FIG. 5 shows an L-type system in which a plurality of terminals are connected to a monitoring device by a multi-drop method via a transmission line.
It is a block diagram which shows AN apparatus. In FIG. 5, 1 is a monitoring device, 2 is a transmission line, and 3 is a plurality of terminals connected to the monitoring device 1 via the transmission line 2 by the multi-drop method to obtain sensor information such as crime prevention and disaster prevention. , Fig. 5
As shown in (a), the address is "1" from the monitoring device 1 side.
The terminal devices 3 that are 01 ”,“ 102 ”,“ 201 ”, and“ 202 ”are sequentially connected via the transmission line 2.

Conventionally, in such a LAN device, when the terminal 3 is added, the address setting of the additional terminal is
For example, as disclosed in Japanese Unexamined Patent Publication No. 6-195582, the address of the terminal 3 to be added to the monitoring device 1 is set and registered in advance, and when the terminal 3 is added, The address is transmitted from the monitoring device 1 to the added terminal device 3 based on the address request.

[0004]

However, in such an address setting method, it is not possible to freely set the address when the terminal 3 is added, and the monitoring device 1
It is necessary to preset and register the address of the additional terminal, and it is necessary to transmit the address from the monitoring device 1 to the terminal 3 when the terminal 3 is added. For this reason, the address of the additional terminal 3 can be set only in the address registered in advance in the monitoring device 1, so that CSMA /
In a multi-drop type local network such as a CD, since the degree of freedom in the addition and relocation of the terminal 3 is high and the terminal 3 is frequently added and relocated, the connection status of the terminal 3 becomes different. It's getting harder to manage.

The present invention has been made in order to solve the problems of the above-mentioned conventional example, and it is not necessary to set an address in the monitoring device in advance, and it is possible to freely add or move terminals. An object of the present invention is to obtain a local area network device capable of setting an address that enables easy management of connection status of terminals.

[0006]

A local area network device according to the present invention is a local area network device in which a plurality of terminals are connected to a monitoring device via a transmission line by a multi-drop method. And a control means for notifying the monitoring device of the address of the adjacent terminal which inquires the address of each adjacent terminal and returned the address, and the monitoring device stores the address of each terminal. The device address data table and the address of the inserting terminal is assigned based on the address of the adjacent terminal notified from the terminals inserted between the terminals, and the inserting terminal is notified and the address is described in the terminal address data table. And a control means for storing the data in the memory.

A local area network device according to another invention is a local area network device in which a plurality of terminals are connected to the monitoring device by a multi-drop method via a transmission line.
A terminal address data table that stores the address of each terminal at the serial number position corresponding to the position where the terminal is sequentially arranged from the monitoring device side, and the address from the terminal inserted between the terminals In response to a setting inquiry, the address stored in the terminal address data table is referred to, the address of the insertion terminal is set, the insertion terminal is notified, and the address is stored in the terminal address data table. It is characterized by having.

Further, when inserting a new terminal between the terminals, the control means of the monitoring device updates the serial number which is a storage area of the terminal following the inserted terminal in the terminal address data table. Then, the addresses of all the subsequent terminals are transferred to and stored in the updated serial number position.

Further, the control means of each terminal notifies the monitoring device of its own address before the relocation at the time of relocation, and the control means of the monitoring device is notified from the relocation terminal before the relocation. Based on the address, update the serial numbers of all terminals subsequent to the terminal before relocation in the terminal address data table, and transfer and store the addresses of all subsequent terminals at the updated serial number position. It is a feature.

[0010]

In the local area network device according to the present invention, each terminal is provided with control means for inquiring the address of each adjacent terminal and notifying the address of the adjacent terminal returned to the monitoring device. A terminal address data table that stores the addresses of the terminals and an address of the inserted terminal based on the address of the adjacent terminal notified from the terminals inserted between the terminals are assigned to the monitoring device. By providing a control means for notifying the inserting terminal and storing the address in the terminal address data table, it is not necessary to set the address in the monitoring device in advance, and it is possible to freely add or move the terminal. Then, the address setting can be automatically performed according to the connection status of the terminal, and the accuracy of the address management is improved.

Further, in a local area network device according to another invention, the address of each terminal is stored in the monitoring device at a serial number position corresponding to the position where the terminals are sequentially arranged from the monitoring device side. The terminal address data table which consists of the following, and the address stored in the above-mentioned terminal address data table in response to an inquiry for address setting from the terminals inserted between the terminals, sets the address of the inserted terminal and inserts it. By providing a control means for notifying the terminal and storing the address in the terminal address data table, the terminal is sequentially arranged from the monitoring device side to the serial number itself indicating the address storage position of the terminal address data table. The connection status of the terminal is identified by the serial number regardless of whether the terminal is added or moved. You can get to know easily, and the accuracy of the address management is enhanced with obtaining performed by the free address settings.

Further, the control means of the monitoring device updates the serial number, which is a storage area of the terminal device following the inserted terminal device, in the terminal address data table when inserting a new terminal device between the terminal devices. Then, the addresses of all the subsequent terminals are transferred and stored in the updated serial number position, so that the address management corresponding to the addition of the terminals can be performed.

Further, the control means of each terminal notifies the monitoring device of its own address before the relocation at the time of relocation, and the control means of the monitoring device is notified from the relocation terminal before the relocation. By updating the serial numbers of all the terminals subsequent to the pre-relocation terminal in the terminal address data table based on the address and transferring and storing the addresses of all the subsequent terminals to the position of the updated serial number. , Address management corresponding to the relocation of terminals can be performed.

[0014]

【Example】

Example 1. FIG. 1 is a conceptual diagram for explaining a local area network device according to the first embodiment. In FIG. 1, 1 is a monitoring device, 2 is a transmission line, 3 is a terminal connected to the transmission line 2 of the monitoring device 1 by a multi-drop method, and the monitoring device 1 is a CPU 10, various data and control programs. And a storage unit 11 having a terminal address data table, which will be described later, a display unit 12 for displaying a control calculation result by the CPU 10, an input / output unit 13 with an external device, and a terminal 3 via a transmission line 2. A communication control device 14 for controlling communication by being connected is provided.

Further, the terminal 3 has a CPU 30, a storage section 31 for storing various data and control programs, and a display section 3 for displaying a control calculation result by the CPU 30.
2, a sensor interface 33 for obtaining sensor information, a communication control device 34 for controlling communication by being connected to the transmission line 2 via a switching unit described later, and the CPU
A switching unit 35 for switching and connecting the communication control unit 34 to the left adjacent transmission line 2a or the right adjacent transmission line 2b under the control of the control unit 30 is provided. The switching unit 35 normally operates under the control of the CPU 30. In the state, both the left adjacent transmission line 2a and the right adjacent transmission line 2b are connected to the communication control unit 34, and when a new terminal 3 is inserted between the terminals, the left adjacent transmission line 3a and the right adjacent transmission line 3a are inserted in the initial state. The transmission line 3b is separated from the transmission line 3b, and is turned on / off when the address of the extension terminal is set so that the left adjacent transmission line 2a or the right adjacent transmission line 2b is alternately connected to the communication control unit 34. The other terminals also have the same configuration as that shown in FIG.

Here, in the connection configuration of the plurality of terminals 3 to which the addresses are set as shown in FIG. 5A, FIG.
As shown in, the address setting of the additional terminal when the terminal 3 is newly added between the terminals 3 having the addresses “102” and “201” will be described. In the state before the addition of the terminal 3 shown in FIG. 5A, the terminal address data table provided in the storage unit 11 of the monitoring device 1 stores the contents as shown in FIG. 2A. Has been done. That is, in the terminal address data table, the serial number "1, 2, 3, 4, ..." Indicating the position of the address storage area is displayed.
As the address of the terminal device 3 corresponding to
2, 201, 202, ... ”are stored, and the connection status of the terminal 3 can be managed by this address. In this case, for example, in the address given by three digits, the highest digit is the floor, and the last two digits are the serial numbers for each floor so that the location of the terminal can be known from the address.

In such a connected state of the terminal 3, as shown in FIG.
As shown in (b), the addresses are "102" and "20".
1 ”when the terminal 3 is newly added between the terminal 3 and the terminal 3, the address setting of the additional terminal 3 is performed by the CPU 3 in the terminal 3.
This will be described with reference to the flowchart shown in FIG. 3, which shows the control by 0 and the control by the CPU 10 in the monitoring device 1.
In FIG. 3, steps S101 to S
Up to 105, the control by the CPU 30 in the additional terminal 3 is shown, and steps S106 and S107 show the control by the CPU 10 in the monitoring device 1. Further, the code of step S shown in FIG. 3 and its control content match the code of step S shown in FIG. 5B and its control content.

First, the CPU 30 of the additional terminal 3 controls the switching unit 35 to connect the left adjacent transmission line 3a side and disconnect the right adjacent transmission line 3b side so that the address on the left adjacent to the side is "102". The terminal 3 is inquired about the address (step S101). Based on this, the terminal device 3 on the left side
Returns the address of its own station (# 102), the additional terminal 3 stores the address of the terminal on the left, which has been returned, in the storage unit 31.
It is stored in (step S102).

Next, on the contrary, the CP of the extension terminal 3
The U30 controls the switching unit 35 to disconnect the left adjacent transmission line 3a side and connect the right adjacent transmission line 3b side so that the address is "20".
An inquiry is made to the terminal 3 on the right side of "1" for the address (step S103). Based on this, the terminal 3 on the right side responds with its own station address (# 201), so the additional terminal 3 stores the returned address of the terminal on the right side in the storage unit 31 (step S104). .

In this way, the additional terminal 3 can know the addresses of the left adjacent terminal and the right adjacent terminal, and the CPU 30 of the additional terminal 3 then controls the switching unit 15 to select the left adjacent terminal. The transmission line 3a and the right adjacent transmission line 3b are connected. Then, the monitoring device 1 is notified via the communication control unit 34 and the switching unit 35 that the address of the left adjacent terminal is "102" and the address of the right adjacent terminal is "201" (step). S105).

On the other hand, the CPU 10 of the monitoring device 1 assigns an address to the additional terminal 3 based on the notification of the address of the left adjacent terminal and the right adjacent terminal from the additional terminal 3.
In this case, the additional terminal 3 is arranged next to the left adjacent terminal having the address “102” and in front of the right adjacent terminal having the address “201”. "103" is assigned as the address of No. 3 and the address is notified to the additional terminal 3 (step S10).
6). The extension terminal 3 receives the notified own station address “10
3 ”is stored in the storage unit 31.

Next, the CPU 10 of the monitoring device 1 updates the contents of the terminal address data table provided in the storage unit 10 as shown in FIG. 2B (step S107).
That is, the extension terminal 3 to which the address "103" is assigned shows the table contents before the extension as shown in FIG.
In (a), the address is "1" in the area where the serial number is "2".
2 (b) is arranged next to the left adjacent terminal set with "02" and in front of the right adjacent terminal with the address "201" in the area of the serial number "3". ), The address “103” of the additional terminal 3 is stored in the area having the serial number “3”, and the addresses “201”, “202”, ... It is transferred so as to be stored in the areas of serial numbers "4", "5", ... Added by 1 to the serial number.

As described above, according to the above-described embodiment, the address itself indicates the arrangement position of the terminal, and at the time of expansion, the expansion is performed by referring to the addresses set in the left and right adjacent terminals. Since the address of the terminal device 3 is automatically assigned, it is not necessary to set the address in the monitoring device 1 in advance, and the address setting according to the connection status of the terminal device is automatically performed corresponding to the free expansion of the terminal device. In addition, the connection status of the terminals can be easily managed, the terminals can be freely added or relocated, and the accuracy of address management is improved.

Embodiment 2 FIG. Next, FIG. 4 is a flowchart showing the control by the CPU 30 in the terminal 3 and the control by the CPU 10 in the monitoring device 1 relating to the address setting when the terminal 3 is moved. When the terminal 3 is relocated, the monitoring device 1 is notified of its own station address before the relocation (step S2
01), based on this, the CPU 10 of the monitoring device 1
In the terminal address data table, the serial numbers of all the terminals 3 following the terminal before the relocation are updated, and the addresses of all the subsequent terminals are moved to the updated serial number positions and stored (step S202). After such steps, step S10 similar to the flowchart shown in FIG. 3 is performed.
The address management corresponding to the relocation of the terminal can be performed by updating the terminal address data table by setting the address of the relocated terminal through 1 to S107 and transferring the serial number and address of the subsequent terminal.
When the terminal is relocated, after step S202 in FIG. 4, in the flowchart shown in FIG. 3, the description of the additional terminal is simply rewritten to the relocated terminal, and the same processing is performed.

Example 3. In each of the above examples,
By indicating the position where the terminal device 3 is sequentially arranged from the monitoring device 1 side in the serial number itself indicating the address storage position of the terminal address data table, regardless of whether the terminal device 3 is added or relocated, There is an effect that it is possible to easily know the connection status of, the address can be freely set, and the accuracy of address management is improved. Especially, in this case, when adding or relocating a terminal, the address of the terminal is set to an address not set in the terminal address data table without referring to the address of the adjacent terminal. You can set the address freely.

[0026]

As described above, according to the present invention, each terminal device is provided with the control means for inquiring the address of the adjacent terminal device and notifying the monitoring device of the address of the adjacent terminal device which is returned. A terminal address data table that stores the addresses of the terminals and an address of the inserted terminal based on the address of the adjacent terminal notified from the terminals inserted between the terminals are assigned to the monitoring device. By providing a control means for notifying the inserting terminal and storing the address in the terminal address data table, it is not necessary to set the address in the monitoring device in advance, and it is possible to freely add or move the terminal. As a result, the address setting can be automatically performed according to the connection status of the terminal, and the address management accuracy is improved.

According to another aspect of the invention, the terminal address of each terminal is stored in the monitoring device at a serial number position corresponding to the position where the terminal is sequentially arranged from the monitoring device side. In response to an inquiry for address setting from the data table and terminals inserted between terminals, the address of the inserting terminal is set by referring to the address stored in the terminal address data table and the inserting terminal is notified. With the provision of the control means for storing the address in the terminal address data table, the serial number indicating the address storage position of the terminal address data table indicates the position where the terminals are sequentially arranged from the monitoring device side. In this way, the connection status of the terminal can be easily known by the serial number regardless of whether the terminal is added or relocated, and a free address is available. Address management of accuracy with less settings get done by the effect of improving.

Also, when inserting a new terminal between the terminals, the control means of the monitoring device updates the serial number which is the storage area of the terminal following the inserted terminal in the terminal address data table. By moving and storing the addresses of all the subsequent terminals to the updated serial number position, the address management corresponding to the addition of the terminals can be performed.

Furthermore, the control means of each terminal notifies the monitoring device of its own address before the relocation at the time of relocation, and the control means of the monitoring device is notified from the relocation terminal before the relocation. By updating the serial numbers of all the terminals subsequent to the pre-relocation terminal in the terminal address data table based on the address and transferring and storing the addresses of all the subsequent terminals to the position of the updated serial number. Therefore, there is an effect that address management corresponding to the relocation of the terminal can be performed.

[Brief description of drawings]

FIG. 1 is a configuration diagram of a monitoring device and a terminal for explaining a local area network device according to the present invention.

FIG. 2 is an explanatory diagram showing the contents of a terminal address data table provided in a storage unit 11 in the monitoring device 1 of FIG.

FIG. 3 is a control flowchart of CPUs 10 and 30 when a terminal is added according to the first embodiment of the present invention.

FIG. 4 is a control flowchart of the CPUs 10 and 30 when the terminal device according to the second embodiment of the present invention is relocated.

FIG. 5 is an operation conceptual diagram showing a state before and after the addition of a terminal.

[Explanation of symbols]

1 monitoring device, 10 CPU, 11 storage unit, 2 transmission line, 3 terminal, 30 CPU.

Claims (4)

[Claims] 1. In a local area network device in which a plurality of terminals are connected to a monitoring device via a transmission line by a multi-drop method, each of the terminals is inquired about an address of each of the adjacent terminals, and a reply is made. The monitoring device is provided with a control means for notifying the addresses of the adjacent terminals to the monitoring device, and the monitoring device has a terminal address data table storing the addresses of the respective terminals, and terminals inserted between the terminals. And assigning the address of the inserting terminal based on the address of the adjacent terminal notified from the terminal, notifying the inserting terminal and storing the address in the terminal address data table. Local area network equipment. 2. A local area network device in which a plurality of terminals are connected to the monitoring device via a transmission line by a multi-drop method, in the monitoring device, terminals are sequentially arranged from the monitoring device side. The terminal address data table, which stores the address of each terminal at the corresponding serial number position, and the terminal address data table, which is stored in the above-mentioned terminal address data table in response to an inquiry for address settings from terminals inserted between the terminals A local area network device comprising: a control means for setting the address of the inserting terminal by referring to the registered address, notifying the inserting terminal and storing the address in the terminal address data table. 3. The control means of the monitoring device updates a serial number, which is a storage area of a terminal following the inserted terminal, in the terminal address data table when inserting a new terminal between the terminals. 3. The local area network device according to claim 1 or 2, wherein the addresses of all subsequent terminals are transferred to and stored in the updated serial number position. 4. The control means of each of the terminals, at the time of relocation,
While notifying the monitoring apparatus of its own station address before the relocation, the control means of the monitoring apparatus is based on the address notified from the relocation terminal before the relocation of the terminal before relocation in the terminal address data table. 4. The local area network device according to claim 3, wherein the serial numbers of all the terminals subsequent to are updated, and the addresses of all the subsequent terminals are moved and stored at the updated serial number positions.