JPH053486A - Data transmitter system - Google Patents

Abstract

PURPOSE:To attain efficient health check and to prevent system-down due to a fault of a node station. CONSTITUTION:A health check start circuit 11 of a monitor node 1 issues a health check command addressed to all node stations for each prescribed time. When a state reply of a node station is a fault state reply, it is detected by a fault reply detection circuit 13 and it informs the reply to a data collection command publication circuit 12 together with an address of the node station from which the fault reply is received. Then the data collection command publication circuit 12 sends a data collection command to the node station sending the fault reply. The node station having a fault and receiving the data collection command collects fault detailed identification data and returns its reply to the monitor node 1.

Description

Detailed Description of the Invention

[0001]

FIELD OF THE INVENTION The present invention relates to data transmission systems.

[0002]

2. Description of the Related Art In a conventional health check in a data transmission system, either the minimum necessary state data is collected or all necessary data is collected.

[0003]

Therefore, the minimum necessary data is insufficient for failure analysis when a failure occurs, and even if an abnormal state is reported in the health check,
The abnormal condition cannot be eliminated by itself, and detailed abnormal condition diagnosis must be performed by another method. Conversely, collecting all data from all node stations causes the health check overhead. It has the drawback of being very large.

[0004]

According to the present invention, in a data transmission system comprising a plurality of node stations and a monitoring node for monitoring the node stations, means for issuing a health check command to the monitoring node, And a means for issuing a data collection command at the time of an abnormal state response to this health check command,
It is characterized in that the node station comprises means for making a status response to a health check command and means for making a response to detailed failure information data in response to a data collection command.

The present invention comprises a plurality of node stations,
In a data transmission system comprising a monitoring node that monitors this node station, the monitoring node comprises:
Means for issuing a health check command and means for issuing a diagnostic command when an abnormal state response to this health check command is provided, and means for issuing a state response to the health check command to the node station; And a means for executing an internal diagnosis of the node station and returning a result of the execution.

The present invention comprises a plurality of node stations,
In a data transmission system comprising a monitoring node that monitors this node station, the monitoring node comprises:
A means for issuing a health check command and a means for issuing an initialization command when an abnormal state response to the health check command is provided, and means for issuing a state response to the health check command to the node station; Means for initializing the node station in response to the activation command.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Next, the present invention will be described with reference to the drawings.

FIG. 3 shows the configuration of a data transmission system to which the present invention is applied. An example is shown in which a loop type transmission line 3 is provided, to which a monitoring node 1 and three node stations 2 are connected. To do.

FIG. 1 is a block diagram of a monitoring node in the first embodiment of the present invention. Referring to FIG. 1, the monitoring node 1 includes a health check activation circuit 11, a data collection command issuing circuit 12, an abnormality response detection circuit 13, a selector 14, a communication control unit 15, a relay circuit 16, a reception circuit 17,
A transmission circuit 18 is included.

FIG. 2 is a block diagram of a node station according to the first embodiment of the present invention. Referring to FIG. 2, the node station 2 includes a command analysis unit 21, a status response unit 22, a data response unit 23, a selector 24, a communication control unit 25, a relay circuit 26, a reception circuit 27, and a transmission circuit 2.
Including 8.

Next, the operation of the first embodiment will be described in detail with reference to FIGS.

Health check activation circuit 1 of monitoring node 1
1 issues a health check command to all node stations at regular time intervals. When the node station 2 receives this health check command, the command analysis section 21 detects that it is a health check command, and notifies the state response section 22 of that. In response to this, the status response unit 22 collects the status of the node station 2 from the communication control unit 25 and returns a status response to the monitoring node 1. When this status response is an abnormal status response, the monitoring node 1 which received it detects it by the abnormal response detection circuit 13, and the data collection command issuing circuit 1
2 is notified together with the address of the node station that has received the abnormal response. Then, the data collection command issuing circuit 12 sends a data collection command to the node station that has received the abnormal response. The node station having an abnormality that has received the data collection command, the command analysis unit 21
Detects that it is a data collection command, and notifies the data response unit 23 of this. In response to this, the data response unit 23 collects detailed fault information data of the abnormality from the communication control unit 25 and returns a data response to the monitoring node 1.

FIG. 4 is a block diagram of a monitoring node in the second embodiment of the present invention. Referring to FIG. 4, the monitoring node 1 includes a health check starting circuit 11, a diagnostic command issuing circuit 12A, an abnormal response detecting circuit 13, and a selector 1.
4, a communication control unit 15, a relay circuit 16, a reception circuit 17, and a transmission circuit 18.

FIG. 5 is a block diagram of a node station according to the second embodiment of the present invention. Referring to FIG. 5, the node station 2 includes a command analysis unit 21, a status response unit 22, an internal diagnosis activation unit 23A, a diagnosis result response unit 24A, a selector 25A, a communication control unit 26A, a relay circuit 27A, a reception circuit 28A, and a transmission. A circuit 29A is included.

Next, the operation of the second embodiment will be described in detail with reference to FIGS.

Health check activation circuit 1 of monitoring node 1
1 issues a health check command to all node stations at regular time intervals. When the node station 2 receives this health check command, the command analysis unit 21 detects that it is a health check and notifies the state response unit 22 of that. In response to this, the status response unit 22 collects the status of the node station 2 from the communication control unit 26A and returns a status response to the monitoring node 1. When this status response is an abnormal status response, the monitoring node 1 which received it detects it by the abnormal response detection circuit 13 and notifies the diagnostic command issuing circuit 12A together with the address of the node station which received the abnormal response. . Then, the diagnostic command issuing circuit 12A sends a diagnostic command for diagnosing the state of the node station to the node station that has received the abnormal response. Upon receiving the diagnostic command, the abnormal node station detects that it is a diagnostic command by the command analysis unit 21 and notifies the internal diagnostic activation unit 23A of this. In response to this, the internal diagnosis activation unit 23A activates the internal diagnosis program of the communication control unit 26A for the communication control unit 26A. The communication control unit 26A that has executed the internal diagnostic program transfers the diagnostic result to the diagnostic result response unit 24A. In response to this, the diagnosis result response unit 24A returns the internal diagnosis result of the node station to the monitoring node 1 as a response.

FIG. 6 is a block diagram of a monitoring node in the third embodiment of the present invention. Referring to FIG. 6, the monitoring node 1 includes a health check activation circuit 11, an initialization command issuing circuit 12B, an abnormal response detection circuit 13, and a selector 1.
4, a communication control unit 15, a relay circuit 16, a reception circuit 17, and a transmission circuit 18.

FIG. 7 is a block diagram of a node station in the third embodiment of the present invention. Referring to FIG. 7, the node station 2 includes a command analysis unit 21, a state response unit 22, an initialization control unit 23B, a selector 24, a communication control unit 25, a relay circuit 26, a reception circuit 27, and a transmission circuit 28.

Next, the operation of the third embodiment will be described in detail with reference to FIGS. 3, 6 and 7.

Health check activation circuit 1 of monitoring node 1
1 issues a health check command to all node stations at regular time intervals. When the node station 2 receives this health check command, the command analysis unit 21 detects that it is a health check command, and notifies the state response unit 22 of this. In response to this, the status response unit 22 causes the communication control unit 25 to
Collects the status of the node station 2 and returns a status response to the monitoring node 1. When this status response is an abnormal status response, the monitoring node 1 which received it detects it by the abnormal response detection circuit 13 and notifies the initialization command issuing circuit 12B together with the address of the node station which received the abnormal response. To do. Then, the initialization command issuing circuit 12B sends the abnormal response to the node station addressed to
Send the node station initialization command. The abnormal node station that has received the initialization command detects that the command analysis unit 21 is the initialization command and notifies the initialization control unit 23B of this.
In response to this, the initialization control unit 23B causes the communication control unit 25
To initialize the communication control unit 25.

[0021]

As described above, according to the present invention, in the health check of the node station of the data transmission system, normally, only the minimum necessary data is collected, and when a failure occurs, the minimum required data is acquired from the node station where the failure has occurred. By collecting the limited amount of data, it is possible to perform an efficient health check without overhead.

Further, according to the present invention, when a failure occurs, a detailed failure diagnosis of the failed node station is performed, so that an effective health check can be performed.

Further, according to the present invention, when a fault of a node station is detected, the faulty node station is initialized to prevent the system from being down due to the fault of the node station.

[Brief description of drawings]

FIG. 1 is a block diagram of a monitoring node according to a first embodiment of this invention.

FIG. 2 is a block diagram of a node station according to the first embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration example of a data transmission system.

FIG. 4 is a block diagram of a monitoring node according to a second embodiment of the present invention.

FIG. 5 is a block diagram of a node station according to a second embodiment of the present invention.

FIG. 6 is a block diagram of a monitoring node in the third embodiment of the present invention.

FIG. 7 is a block diagram of a node station according to a third embodiment of the present invention.

[Explanation of symbols] 1 Monitoring node 2 node station 3 loop type transmission line 11 Health check start circuit 12 Data collection command issuing circuit 12A Diagnostic command issuing circuit 12B Initialization command issuing circuit 13 Abnormal response detection circuit 14 Selector 15 Communication control unit 16 Relay circuit 17 Receiver circuit 18 Transmitter circuit 21 Command analysis part 22 Status response part 23 Data response part 24 selector 25 Communication controller 26 Relay circuit 27 Receiver circuit 28 Transmitter circuit 23A Internal diagnosis starting unit 24A Diagnosis result response part 25A selector 26A communication control unit 27A relay circuit 28A receiver circuit 29A transmitter circuit 23B Initialization control unit

Claims (3)

[Claims] 1. A data transmission system comprising a plurality of node stations and a monitoring node for monitoring the node stations, a means for issuing a health check command to the monitoring node, and an abnormal state response to the health check command. In this case, the node station includes means for issuing a data collection command, means for making a status response to the health check command, and means for responding to the data collection command with detailed failure information data. A data transmission system characterized in that 2. A data transmission system comprising a plurality of node stations and a monitoring node for monitoring the node stations, a means for issuing a health check command to the monitoring node, and an abnormal state response to the health check command. And a means for issuing a diagnostic command, and means for giving a status response to the health check command to the node station,
A data transmission system comprising means for executing an internal diagnosis of the node station in response to a diagnostic command and responding the execution result. 3. A data transmission system comprising a plurality of node stations and a monitoring node for monitoring the node stations, a means for issuing a health check command to the monitoring node, and an abnormal state response to the health check command. At this time, the node station is provided with means for issuing an initialization command, and the node station is provided with means for making a status response to a health check command and means for initializing the node station for the initialization command. A data transmission system characterized in that