JPS609246A - Monitor system for data circuit network - Google Patents

Abstract

PURPOSE:To shorten the fault retrieving time by providing a circuit abnormality deciding means to a data processor in order to limit the faulty areas in a loop type circuit network. CONSTITUTION:A data processor 1 conostitutes a loop circuit network via a transmission line 1'-, a data processor 3, a transmission line 3'- and a transmission line 5' respectively. If an abnormality of the circuit arises, the input of a detection part 9 does not exist any more. Then the output 9' is produced after a set time, and a production part 10 produces a circuit abnormality message. This message is transmitted to a transmission line via a conversion part 11 and a driver 12. A detection part 16 monitors a reception message as the output of the part 14 and delivers the transmitter discrimination information in the detected circuit abnormality message to a display part 17 of a circuit abnormality transmitter to transmit it to a monitor operator.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a monitoring method that facilitates searching for the location of a line abnormality in a data line network connected in a loop through an intermediate transmission path of a data processing device.

Conventionally, the start-up method for this type of data line network has included line management means in one data processing device in the data line network.
A data processing device (hereinafter abbreviated as a monitoring device) having line management means monitors messages flowing through the network on its own receiving line, and sends invitation messages to the data processing device or messages between the data processing devices. If Isunemo did not arrive for a certain period of time, it was determined that the line was abnormal.

Therefore, when a line abnormality occurs, it is possible to determine that the recall abnormality has occurred somewhere in the line network, but it is not possible to determine where it has occurred. The data processing devices and transmission lines that make up the line network have to be investigated one after another, which sometimes requires a great deal of time to recover from a fault.

The present invention provides some of the data processing devices in the data line network with a line abnormality determination means, and at that time automatically identifies an identification unit that indicates that the own device is the source and a line abnormality occurs. By providing a means for transmitting a message equipped with an identification unit indicating that a failure has occurred, and having a means for determining in the monitoring device which data processing device has made the determination of the line abnormality in the message, it is possible to prevent the occurrence of a failure. This provides a monitoring method that can limit the location of occurrence and shorten the time required to search for a fault.

A loop-connected data line network is comprised of a plurality of data processing devices and a transmission line connecting them in a loop. In a loop-connected data line network, it also serves as a monitoring device for all data processing devices within the line network. This monitoring device sends invitation messages to the data network for data transmission within the data network. When the other data processing devices receive all the invitation messages, if there are any messages to be sent from the own device to the other devices, they are sent to the line. Messages are transmitted from one device to another via data processing devices and transmission lines therebetween. The transmission means usually employs a method in which either an invitation message or a message from one device to another is transmitted within a loop at regular intervals. Conventionally, in order to monitor a line network, a monitoring device determines whether either an invitation message or a message from one device to another arrives on a receiving line within a certain time interval.
When the line did not arrive within a certain time interval, it was determined that there was an abnormality in the line and a good news message was sent to the monitor.

In this case, if message transmission on the line was interrupted somewhere, the monitoring equipment would not receive information about where the interruption occurred, so it was not possible to pinpoint the location of the failure.

Therefore, in the present invention, some data processing devices in the line network are equipped with a line abnormality determination means, and when a line abnormality is detected, they spontaneously identify themselves as the sender even if the solicitation message does not arrive. The first feature is to have a means for transmitting a message, which includes an identification section indicating that the receiving line is abnormal and an identification section indicating that the receiving line is abnormal. The message arrives at the monitoring device because the line is configured in a loop.

Furthermore, a second feature of the present invention is that, when the message arrives at the monitoring device, means is provided for notifying the monitoring person which data processing device detected the line abnormality based on the content of the message. That is.

According to the first and second features described above, the present invention can convey line abnormality information that limits the occurrence location to a line network monitor.

Embodiments of the present invention will be described with reference to the drawings.

FIG. 1 shows a data line network according to the present invention in a case where there are five data processing devices. In implementation, the number of data processing devices is arbitrary.

FIG. 2 shows a configuration diagram of a data processing device having a line abnormality determination function according to the present invention. FIG. 3 shows a configuration diagram of a data processing device having the function of a monitoring device according to the present invention.

In FIG. 1, 1, 2, 3.4.5 are data processing devices f:l', 2', 3', 4', and 5' are transmission paths. The output of data processing device 1 is connected to transmission path II, and 1' is connected to the input of data processing device 2. Device 2 in the following order
The output of is connected to the transmission line 2', and the transmission line 2' is connected to the input of the device 3,
The output of device 3 is connected to transmission path 3', the transmission path 3' is connected to input of device 4, the output of device 4 is connected to transmission path 4', the transmission path 4' is connected to input of device 5, and the output of device 5 is connected to transmission path 3'. transmission line 5' to line 5'
is connected to the input of device l, forming a loop line network.

In the present invention, one or more data processing devices having a line abnormality detection function are provided in the line network, but in this embodiment, it is assumed that the data processing device 3 has this function.

FIG. 2 shows the structure of the line interface section of the data processing device 30. Input 3' of device 3 receiver 6
Close to! The output of the receiver (6) is connected to the input of the received data format converter 70. The received data format converter 7 converts the data format on the line into a format that can be processed by the data processor 8. The output of the data format conversion section 7 is connected to the input of the data processing section 8 and the input of the receiving line abnormality detection section 9.This detection section 9 monitors the output of the conversion section 7 and if a message does not arrive within a certain time interval. The output of the reception line abnormality detection section 9 is connected to the line abnormality message generation section 10.This message generation section 10 generates a line abnormality message if there is an output from the abnormality detection section 9. .

Message outputs from the data processing section 8 and message generation section 10 are connected to the input of a transmission signal format conversion section 11 . This conversion section 11 converts the format of the message from the data processing section 8 into the data format on the line.

The output of the transmission signal format converter 11 is connected to a driver 13, and the output of the driver 13 is connected to a transmission line 3'.

In FIG. 2, the message received by the receiver 6 is input to the data processing s8 via the received signal format converter 7. If the received message is an invitation message, the data processing section 8 converts the message sent from the own device to the other device into a converting section 11. If the message is not sent to the transmission path via the driver 12, the transmission invitation message is sent to the transmission path via the converter 11 and the driver 12. If the received message is a transmission message from one device to another, the data processing section 8 uses the message addressed to the own device, so to speak, and converts the invitation message into the conversion section 11. driver 12
If not, the received message is sent to the converter 11 and driver 12 again. When a line abnormality occurs, the input to the receiving line abnormality detection unit 9 is lost, so the
' is generated, and the message generation unit 10 generates a line abnormality message. The line abnormality message includes at least an identification part 3 indicating that the message is the sender and an identification part indicating that a line abnormality has been detected. The line abnormality message is sent to the transmission path via the conversion unit 11° driver 12.

Other data processing devices other than the monitoring device are 9 and 9 in Figure 2.
The configuration is the same as 3 except that 10 does not exist, and the operation on the line interface is also 9.10'.
The operation is the same as 3 except for t-.

The present invention also uses at least one data processing device as a monitoring device, and in this embodiment, it is assumed that l has this function.

FIG. 3 shows the configuration of the line interface section of the monitoring device. 13 is a driver, 14 is a received data format converter, 1
5 is a data processing section, 18 is a transmission data format conversion section, 19
is a driver, and the connections between the above parts are the same as in FIG. 2, and the operation in that range is also the same as in 3. The differences are described below.

In FIG. 3, the output of the data format conversion section 14 is input to the data processing section 15 and the line abnormality message detection section 16.
connected to the input of The line abnormality message detection unit is 14
When a line abnormality message is detected, the sender identification information in the message is output to the line abnormality transmission device display section 17. This display section 17 displays the source identification information from the detection section 16 to the monitor.

Now, if we consider the case where the transmission line 1' is disconnected, no messages will arrive at the device 3 after that. For this reason, device 3
sends a line abnormality message to transmission line 3'. This message includes devices, transmission lines, 3', 4.4', 5.5'
It arrives at device 1 via . Therefore, does device 1 detect the line abnormality in device 3? l-Display. Therefore, the monitor can determine that the line abnormality occurs in the range of 1' and 2.2'.

As explained above, the present invention provides some of the data processing devices constituting the data line network with line abnormality determination means, and at that time, when a line abnormality occurs, an identification section indicating that the own device is the source FC data processing device is equipped with a means for transmitting a message with an identification unit indicating that the fc data processing device is being used, and the monitoring device uses the message to determine a line abnormality. By providing a means for detecting a fault in the data line network, information limiting the location where a fault has occurred can be conveyed to a supervisor, which has the effect of shortening the time it takes to search for a fault when a fault occurs in the data line network.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a data line network, FIG. 2 is a block diagram of a data processing device having a line abnormality determination function, and FIG. 3 is a block diagram of a data processing device having a monitoring device function. In the figure, 1.2.3, 4.5 are data processing devices, h
/ , 21.3/ , 4/ , 51 are transmission lines, 6.1
3 is a receiver, 7.14 is a received signal format converter, 8,1
5 is a data processing unit, 11.18 is a transmission signal format conversion unit,
12.19 is the driver, 9 is the receiver (g line abnormality detection unit,
Reference numeral 10 indicates a line abnormality message generation section, 16 a line abnormality message detection section, and 17 a line abnormality transmission device display section. ,,/-'” -1-゛rod 11 yen] Kushi 3 wins

Claims (1)

[Claims] In a monitoring method for a data recollection network in which data processing devices are connected in a loop through a transmission path, there is a means for determining that a receiving line has become abnormal in one or more of the data processing devices, and a means for determining that a receiving line has become abnormal in one or more of the data processing devices. When it is determined that the message is a sender, it voluntarily sends a message to the line, which has at least an identification part that shows that it is the sender, an identification part that shows that the receiving line is abnormal, and an identification part that shows that the receiving line is abnormal. and means for transmitting, when at least one data processing device receives the message, which data processing device has detected an abnormality based on the information of the message and the message. A characteristic data line network monitoring method.