JPS63311849A - Communication supervisory equipment - Google Patents

Abstract

PURPOSE:To remarkably contrive the improvement of the supervisory function of the entire network without remarkable change in the present function of the AN and PBX side by using a communication supervisory means and a state monitoring means. CONSTITUTION:When an input circuit 32 does not receive a normal signal from one of a local area network (LAN) 10 and a private branch of exchange network control circuit (PBX) 20, a communication monitor means 33 discriminates it and sends a fault signal to the other. When an input circuit 32 receives the normal signal from both the LAN 10 and the PBX 20 and either the LAN 10 or the PBX 20 generates a fault signal or a state signal of a plant equipment or terminal equipment or the like, a state monitoring means 34 analyzes the content to generate the message and the message is sent as an object. Thus, the supervisory function of the entire network is improved remarkably without changing the present function of the LAN and PBX remarkably.

Description

[Detailed Description of the Invention] [Objective of the Invention] (Industrial Application Field) This invention relates to a local area network (hereinafter referred to as LAN) applied to an industrial plant, etc., and a local area network (hereinafter referred to as LAN) applied to an industrial plant, etc. The present invention relates to a communication monitoring device that monitors the communication status of a network connected to a switching network control circuit (hereinafter referred to as PBX).

(Prior art) In recent years, with the spread of LAN and PBX, the scale of communication has expanded from the conventional plant-wide communication network to an even wider inter-plant network by combining the two. It's coming. By the way, while the expansion of the scale of communications brings great benefits, there is a risk that accidents will spread when some kind of failure occurs.

In order to prevent such accidents from spreading, conventionally, the LAN side, PB
A communication monitoring function was added to each side of the X side.

(Problems to be Solved by the Invention) In the above-described communication network connecting the LAN and PBX, adding a communication monitoring function to each of the LAN side and the PBX side is sufficient as a monitoring system for each.

However, since mutual status monitoring is not performed, there is a problem that, for example, in the case of a failure in equipment that does not communicate frequently, including terminals, abnormal situations may not be noticed until actual communication occurs. there were.

This invention was made to solve the above problems, and provides a communication monitoring device that can significantly improve the monitoring function of the entire network without significantly changing the current functions of the LAN side and PBX side. The purpose is to provide.

[Structure of the Invention] (Means for Solving the Problems) As shown in FIG.
A port 31 for providing a communication path for each PBX 20 to which various terminal devices are connected, an input circuit 32 for receiving normal signals from the LAN 10 and the PBX 20, and a port 32 for receiving normal signals from the LAN 10 and the PBX 20. A communication monitoring means 33 that sends an abnormal signal to the other side when a normal signal is not received, and an input circuit 32 connected to the LA
Receive normal signals from both N10 and PBX20,
and a status monitoring means 34 that analyzes the contents of the abnormality signal or status signal of the plant equipment, terminal, etc., creates a message, and transmits this message to the transmission target when either one of the LAN10 and the PBX 20 generates an abnormal signal or status signal of the plant equipment, terminal, etc. It is characterized by having the following.

(Function) In the present invention, when the input circuit 32 does not receive a normal signal from either the LAN 10 or the PBX 20, the communication monitoring means 33 determines this and sends an abnormal signal to the other. , the input circuit 32 is connected to the LAN10
and PBX 20, and the L
When either the AN 10 or the PBX 20 generates an abnormal signal or status signal from plant equipment, terminals, etc., the status monitoring means 34 analyzes the content, creates a message, and sends this message to the transmission target. Therefore, the monitoring function of the entire network can be greatly improved without significantly changing the current functions of the LAN side and the PBX side.

(Embodiment) FIG. 2 is a schematic configuration diagram showing an embodiment of the present invention together with a monitoring target. Here, the stations 11 constituting the LAN are interconnected by a transmission path AI.

Further, a computer 22, a facsimile 23, and a telephone 24 are connected to the PBX 20 as terminal devices through a communication line A2. A communication monitoring device 30 is provided between the stations 11 and BX via a transmission path A3.
20 through a transmission path A4.

FIG. 3 is a block diagram showing a specific configuration of the communication monitoring device 30, including transmitting/receiving ports (31a, 31b) for transmitting and receiving data to and from the LAN station 11.

Transmission/reception port 31 for transmitting and receiving between 31c and PBX20
d, and an input/output port 31e for connecting a display device and an input device used to operate the communication monitoring device 30.
, an input circuit 32a for inputting a LAN electrical normal signal, and an input circuit 32 for inputting a PBX normal signal.
b, a signal storage device 35 that stores abnormality contents of the LAN and PBX 20, abnormal signals, and signal destination addresses, a communication procedure storage device 36 that stores various transmission procedures depending on the destination, and a communication procedure storage device 36 that stores various transmission procedures according to the destinations, and controls the various devices. Central processing unit 37
and a program storage device 38 storing a program for the central processing unit 37 to interpret and execute,
These are connected by a system bus 39.

FIG. 4 is a schematic diagram of the external connection ends of the station 11 and the PBX 20. Here, the station 11 receives power from the power line AO via the circuit breaker 12, closes the normal signal generation contact 13 and generates the normal signal S1 while the entire device is operating normally. A transmission path A3 is led out from the transmission/reception port 14. Also, P.B.
X20 receives power from the power line AO via the circuit breaker 25, and closes the normal signal generation contact 26 to generate the normal signal S2 while the entire device is operating normally.
A transmission path A4 is led out from the transmission/reception port 27.

FIG. 5 is a schematic diagram of the external connection end of the communication monitoring device 3'0, in which a transmission path A3 is connected to the transmission/reception ports 31a and 31b, a transmission path A4 is connected to the transmission/reception port 31d, and the input circuit 32 is connected to the transmission path A3. A normal signal S1 of the station 11 and a normal signal S2 of the PBX 20 are respectively input.

The operation of this embodiment configured as described above will be explained with reference to the flowcharts of FIGS. 6 and 7 showing the processing procedure of the central processing unit 37.

First, the station 11, which receives power from the power line AO, closes the contact 13 and outputs one normal signal S1 during normal operation, and the PBX 20, which receives power from the power line AO, closes the contact 13 during normal operation. 26 and outputs a normal signal S2. Input circuit 32a of communication monitoring device 30,
32b receives this, the central processing unit 37 monitors it, and if the PBX 20 side is not normal and the LAN l0
If the side is normal, it notifies LAN10 that "transmission to rPBX20 is not possible" (steps 111 to 1).
13). On the other hand, if the PBX 20 side is normal but the LAN 10 side is not normal, select the destination via the PBX 20 and create a message "Unable to send message on the rLAN 10 side" (Steps 121 to 123), then select the communication protocol and send the message. The message is sent after converting the communication message for each type. (Steps 145-149).

Next, in a state where both LAN10 and PBX20 are outputting normal signals, it is determined whether there is a call from PBX20 and whether a signal from LAN10 is received (steps 131 and 141).

Here, if a signal is received from the transmission/reception port 31d on the PBX 20 side that indicates the occurrence of an abnormality in the terminal, the PBX
The line is connected by returning a response to the line connection request made in response to the monitoring request from 20, and an abnormal signal is received using the communication procedure specific to the monitoring device.Then, after disconnecting the line, the protocol In addition to analyzing the message and creating a message in response to the abnormality, it is sent to LAN1.
0 side (steps 132 to 139).

Next, when a signal indicating the occurrence of a communication abnormality or an abnormality in the plant is received from the transmission/reception port 31a on the LAN10 side, the content of the abnormality, the abnormal signal, and the signal destination address are selected from the signal storage device 35, Destination is LAN
If the station is 10, it will send an abnormality signal according to the communication procedure on the LAN side, and if the destination is a device via a PBX, it will pass the destination terminal number to the PBX, request line connection, and connect the line. After confirming that the device is connected, the operation of transmitting an abnormality signal in accordance with the communication procedure of the destination device is repeated until the transmission of the signal to the required destination is completed (steps 142 to 149).

Here, if the PBX 20 has a broadcast communication function, that function is used to simultaneously transmit an abnormality signal to a plurality of destinations that can communicate using the same communication procedure.

Thus, according to this embodiment, LAN station 1
1 and the device communicating via PBX20,
Communication abnormalities can be monitored without connecting a line for status monitoring, and at the same time, it is possible to notify terminals of the PBX 20, which normally do not perform any data communication, of the occurrence of an abnormality.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, when a normal signal is not received from either the LAN or the PBX, the communication monitoring means determines this and transmits an abnormal signal to the other, When normal signals are received from both the LAN and PBX, and either the LAN or the PBX generates an abnormal signal or status signal, the status monitoring means analyzes the contents, creates a message, and sends this message. Since the information is transmitted to the target, there is an effect that the monitoring function of the entire network can be significantly improved without significantly changing the current functions of the LAN side and the PBX side.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing the configuration of the present invention, Fig. 2 is a schematic block diagram showing an embodiment of the invention together with a monitoring target, and Fig. 3 is a block diagram showing the specific configuration of the embodiment. figure,
FIGS. 4 and 5 are schematic configuration diagrams of the monitoring target and the connection end of the same embodiment, and FIGS. 6 and 7 are flowcharts for explaining the operation of the same embodiment. DESCRIPTION OF SYMBOLS 10... Local area network, 20... Private branch exchange network control device, 30... Communication monitoring device, 31...
- Transmission/reception port, 32... Input circuit, 33... Communication monitoring means, 34... Status monitoring means. Applicant's agent Mr. Sato Figure 1 Figure 2

Claims (1)

[Claims] In monitoring the communication status of a network that combines a local area network applied to an industrial plant, etc. and a private branch exchange network control circuit to which various terminal devices are connected, the local area network and the private branch exchange network control circuit an input circuit for receiving normal signals from the local area network and the private branch exchange network control circuit; communication monitoring means for transmitting an abnormal signal to the other side when a normal signal is not received from one side; and the input circuit receives normal signals from both the local area network and the private branch exchange network control circuit; Condition monitoring means that when either the area network or the private branch exchange network control circuit generates an abnormal signal or status signal from plant equipment or terminals, the content is analyzed, a message is created, and this message is sent to the transmission target. A communication monitoring device comprising: