JPS62120753A - Line monitor system - Google Patents

Abstract

PURPOSE:To eliminate the intermission of communication due to insertion of a measuring instrument by providing a monitor line set reading a data of a time slot commanded by a monitor control in a loop communication network, connecting a measuring instrument thereto and setting the time slot of a monitored line to the said line set. CONSTITUTION:A monitor console 10 has the same table as a line table in a transmission line 3 and when a line number desired for monitor is inputted, the time slot address used for the line is retrieved from the said table and sent to a monitor line set 9. The line set 9 set the time slot address to a time slot register 13. The content of the register 13 and a time slot address (a) extracted from the line data carried on the transmission line 3 are compared by a comparator 14, and when they are coincident, a gate 15 is opened and a line data (b) is outputted to a scope 11.

Description

[Detailed Description of the Invention] [Summary] In a time division multiplexed loop highway communication network,
Create a monitor lineset that can read the data of the timeslot indicated by the monitor console, and add an online connection to the monitor lineset.
By connecting a measuring device such as a scope and setting the time slot of the line to be monitored using the monitor console to the monitor line set, the data of the desired line can be monitored using the measuring device. It is disclosed that this was done.

[Industrial application field]

The present invention relates to a nine-line monitoring system, and more particularly to a line monitoring system that allows data on any line in a time-division multiplex loop type communication network to be monitored under centralized control.

[Problems to be solved by conventional technology and invention] Conventional 1
When monitoring line data, a measuring device such as an online scope is inserted between the line center, which is the interface of the terminal or host, and the terminal or host, and the line data is monitored. Line monitor systems that do this are known.

The conventional system described above has an undesirable problem in that communication on the two lines is temporarily interrupted when the measuring instrument is inserted into a desired position. In addition, if there are multiple lines that you want to monitor, not only does it take a lot of time to change the connection of the measuring equipment mentioned above (but it is also easy to make connection mistakes, which can lead to problems with other lines). There was an undesirable problem of affecting the

[Means and effects for solving the problems] The present invention solves the above problems.

It is equipped with a monitor line set and a monitor node for line monitoring, and a monitor console for controlling the monitor line set.

FIG. 1 shows a basic configuration diagram of the system of the present invention.

In the figure, 1 is the host, 2 is the terminal, 3 is the data transmission path,
4 is the host node (N+), 5 is the host line set (n+), 6 is the terminal node (NZ), 7 is the terminal line set (nz), 8 is the monitor node (M), 9 is the monitor line Set (m), 10 represents the monitor console, and 11 represents the online scope.

A host l is connected to the loop-type data transmission path 3 via a host node 4 and a host line set 5,
terminal 2 via terminal node 6 and terminal line set 7
is connected. That is.

Data is transmitted and received between the host 1 and the terminal 2 via the data transmission path 3.

The present invention provides a monitor node 8 and a monitor line set 9 for monitoring data on the data transmission path 3.
A monitor console 10 and an online scope 11 are connected to the monitor line set 9.

The monitor console 10 uses a personal computer, for example, and has the same table as the line table in the data transmission line 3, and inputs the line number or name given to each line to be monitored. Then, the monitor console 10 searches the line table for the time slot address used by the line and sends it to the monitor line set 9.

Based on the data sent from the monitor console 10, the monitor line set 9 extracts line data corresponding to the data and outputs it to the online scope (Detailed explanation of the monitor line set 9) teeth,
(described later with reference to FIG. 2).

In this way, desired line data can be observed using the online scope 11.

〔Example〕

Figure 2 is a block diagram of a monitor line set according to the present invention, Figure 3 is an embodiment of the present invention applied to a P-P line, and Figures 4 and 5 are each applied to a multi-drop line. Examples of the present invention are shown below. Note that code 1 in Figure 5
1 to 11 correspond to FIG.

Regarding the monitor line set 9 according to the present invention.

This will be explained in detail with reference to FIG. In the figure, reference numeral 12 represents a microprocessor (MPU), 13 a time slot register, 14 a comparator, and 15 a gate.

In FIG. 2, when the monitor line set 9 receives data from the monitor console 10 described above, the MPU 12 decodes the data and sets the designated time slot address in the time slot register 13. The comparator 14 compares the contents of the time slot register 13 with the time slot address (a in FIG. 2) extracted from the line data carried on the data transmission path 3 described above, and if they match. The gate 15 is opened to output one line data (b in FIG. 2) to the online scope 11. In this way, the line data instructed by the monitor console 10, that is, the line data to be monitored, can be observed using the online scope.

FIG. 3 shows an embodiment in which the system of the present invention is applied to a P-P line. P for one-to-one communication between host 1 and terminal 2
- In the case of the P line, host data (time slot T, 1 in the diagram) and terminal data (time slot Tn++ in the diagram) are always loaded on the time slot, so the monitor node with monitor line set 9 8 may be connected to any position of the loop-shaped data transmission path 3. That is, the position shown in FIG. 2 may be sufficient, or the position indicated by the dotted line in the figure may be used. Although the monitor console 10 and online scope 11 are not shown in FIG. 3 and FIG. 4, which will be described later, they are connected to the monitor line set 9 in the same manner as in FIG.

FIG. 4 shows an embodiment in which the system of the present invention is applied to a multi-drop line. In the case of the multi-drop line, when the host 1 outputs data, the data output from the terminal 2 is erased. That is, as shown in FIG. 4, between the output side of the terminal node 6 and the input side of the host node 4, data is transmitted from the host 1 to the terminal 2 at the time slot T11, and data is transmitted from the host 1 to the terminal 2 at the time slot T11.
7°.

The data from the terminal 2 to the host 1 is loaded in each of the terminals. However, since the data from terminal 2 to host 1 loaded in time slots T, , +H is erased at host node 4,
There is no data from the terminal 2 to the host 1 between the output side of the terminal node 6 and the terminal node 6. Therefore, in the case of a multi-drop line, the installation position of the monitor node 8 is limited to between the output side of the terminal node 6 and the input side of the host node 4, as shown in FIG. It turns out.

However, in a loop highway communication network.

Normally, the data transmission paths are duplexed, and the data transmission directions in each data transmission path are opposite to each other.

Therefore, if a failure occurs in one of the data transmission paths and the transmission path is switched, the data transmission direction will be reversed.
It becomes impossible to monitor data on one side of the multi-drop line.

FIG. 5 shows an embodiment of the monitor system of the present invention applied to a multi-drop line in which the data transmission path is duplicated as described above. That is.

The monitor nodes 8 are installed on both sides of the host node group (HN1 to HN,), and when the data transmission path is switched, by switching the changeover switch 16,
Data in both directions can be monitored at all times.

〔Effect of the invention〕

As explained above, according to the present invention, it is possible to monitor any desired line by inputting the name of the line to be monitored into the monitor console. Moreover, not only is data communication not interrupted due to the connection of the measuring device, but also the trouble of connecting the measuring device can be saved. Furthermore, since connection errors do not occur, it is possible to avoid affecting other lines.

[Brief explanation of drawings]

FIG. 1 is a basic configuration diagram of the system of the present invention, FIG. 2 is a block diagram of an embodiment of the monitor line set shown in FIG. 1, and FIG.
The figure shows an embodiment of the present invention applied to a P-P line, and FIGS. 4 and 5 show respective embodiments of the invention applied to a multi-drop line. In the figure, 1 is a host, 2 is a terminal, 3 is a data transmission path, 4 is a host node, 5 is a host line set, 6 is a terminal node, 7 is a terminal line set 8 is a monitor node, 9
is the monitor line set 10 is the monitor console, 1
1 is an online scope, 12 is a microprocessor, 13 is a time slot register, 14 is a comparator,
15 represents a gate, and 16 represents a changeover switch. System 74 of the present invention L end 1 part 1 Figure 1 Figure 2 Diagram of monitor line set P
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Claims (1)

[Scope of Claims] In a communication network in which a plurality of nodes are connected by a circular time-division multiplexing loop highway, a monitor line set (9) for reading data in an arbitrary time slot on a transmission path; Monitor line set (9) is installed on the monitor line set (9).
A node (8) and a monitor console (10) for controlling the monitor line set, and the monitor line set (9) controls the loop in response to instructions from the monitor console (10). A line monitoring system characterized by collecting and monitoring data of any line on a type highway communication network.