JPH01174043A - Monitoring connection system in ring type network - Google Patents

Abstract

PURPOSE:To attain correct communication with a monitoring equipment even if the connection destination of the monitoring equipment is not definite by informing the presence of the monitoring equipment and its connection destination address information to all stations on a ring type network when the monitoring equipment is started. CONSTITUTION:When the monitoring equipment 15 is connected to the IF 12a of an STN 11-1 and the monitoring equipment 15 is started, a monitoring equipment connecting notice C is sent to the connection destination STN 11-1. A frame data sent from the STN 11-1 to a transmission line 13 is transmitted to all other STNs 11-2-11-n and the content of a sender address field SA in the received frame data is registered in the internal memory as connection destination address information of the monitoring equipment. The stations 11-1-11-n send event information to the monitoring equipment 15 on the occasion of production of an event such as abnormality afterwards.

Description

[Detailed Description of the Invention] CObjective of the Invention (Industrial Application Field) This invention relates to a ring network in which a plurality of stations are connected in a ring shape through a common transmission path, and particularly relates to a ring network in which a plurality of stations are connected in a ring shape through a common transmission path. The present invention relates to a monitoring device connection method in a ring network suitable for connecting a monitoring device to a desired station.

(Prior Art) Generally, a monitoring device for monitoring various states of a ring network is generally used by being connected to a predetermined station (specific station). The address of the specific station to which the monitoring device is connected (specific address) is fixedly stored in advance in each station connected to the ring network. Therefore, when an event such as an abnormality occurs at each station t, event information to that effect can be sent to the monitoring device using the above-mentioned specific address that is fixedly stored in advance. When the monitoring device receives event information from the station, it performs various processing (
alarms, notifications, etc.).

Now, when considering work such as maintenance using a monitoring device, it is preferable in terms of work efficiency that the monitoring device can be connected to any station. However, in the past, supervision? As mentioned above, the station to which the JL device is connected is fixedly determined in advance, so in order to relocate the monitoring device to the desired station, the address of the connected station fixedly stored in each station must be changed. I had to.

(Problems to be Solved by the Invention) As mentioned above, conventionally, the stations to which the monitoring device is connected are fixedly determined in advance, and the connection destination address information is fixedly stored in each station in advance. ,
To relocate the monitoring equipment, it is necessary to change the connection destination address information fixedly stored in each station using the hardware, and if this change is not done, maintenance personnel etc. There was a problem with having to go to the station.

Therefore, it is an object of the present invention to provide a monitoring H-position connection method in a ring network, in which connection of a monitoring device to any station in the ring network can be easily performed without the need for complicated procedures. This should be an important issue.

[Structure of the Invention] (Means for Solving the Problems) This invention provides a system in which a monitoring device for monitoring various states of a ring network is connected to one of a plurality of stations on the network and activated in a 1'C state. When a connection is made, the destination address information is obtained from the destination station, and a monitoring device connection notification with this address information set in the source address field is sent from the monitoring device to each station by simultaneous broadcast. It is characterized by:

(Operation) According to the above configuration, when the monitoring device is activated, the existence of the monitoring device and its connection address information are notified to all stations on the ring network by the monitoring device connection notification from the monitoring device. Is each station supervised? No matter which station the Jl device is connected to, the connection destination can be correctly recognized, and even if the connection destination of the monitoring device is not fixed as in the past, it can correctly communicate with the monitoring device.

(Embodiment) FIG. 1 is a block diagram showing an embodiment of a network system to which the present invention is applied.

In the same code, 10 is a high-speed ring network forming a trunk network, 11-1.11-2...11-
○ is a station (hereinafter referred to as STN).

S T N 11-1 to 11-n each have a branch network or an interface (hereinafter referred to as IF) for connecting the monitoring head to the ring network 10. a13 has the station 11-1. 11-2...1
1-n in a ring, such as a transmission line (ring bus) such as an optical fiber cable; 14, a branch network, such as a bus-type network; 15, various states of the ring-type network 10 (S T N 11-1); This is a monitoring device that monitors the status of the transmission line 13, the status of the transmission path 13, etc.

The monitoring device 15 must be a terminal with an interface compliant with R3232C etc.
It is possible to connect to any of the following. In the example of FIG. 1, the monitoring device 15 is connected to S T N 11-1. At startup, the monitoring device 15 transmits address information indicating the existence of the device 15 and the connection destination (connection destination address information) to all STNs.
11-1 to 11-0, and when disconnecting from the connection destination STN, the connection destination address information before disconnection of the device 15 is sent to all STNs.
A monitoring device disconnection notification is sent to notify T N 11-1 to 11-n.

FIG. 2 shows the format of the main part of frame data applied in the network of FIG. 1.

As shown in FIG. 2(a), this frame data includes a destination address field DA, a source address field SA, and a type designation field for designating the transmission type. The types of transmission in this embodiment are roughly divided into two types: data transmission between bus networks and data transmission between monitoring devices. The types of data transmission with the monitoring device include the above-mentioned monitoring device connection notification C and monitoring device disconnection notification. In addition, Figure 2 (
In a), data fields etc. are omitted.

Now, if the frame data shown in FIG. 2(a) is the monitoring device connection notification C, as shown in FIG. 2(b),
The destination address field DA contains the broadcast address,
The source address field SA contains the STN (station) and IF (interface) addresses to which the monitoring device is connected (STN address + IF address).
, and a type code indicating a monitoring device connection notification is set in the type designation field. On the other hand, if the frame data shown in FIG. 2(a) is a monitoring device disconnection notification, the destination address field DA contains the broadcast address as shown in FIG. 2(C). Source address field The SA includes the STN and IF address to which the monitoring device is connected (STN address +
IF address), and the type specification field is supervisor?
! A type code indicating rental connection disconnection is set respectively.

Next, the operation of one embodiment of the present invention will be explained in FIGS. 3 and 4.
The processing procedure will be explained with reference to the diagram. First of all
In each of the stations 11-1 to 11-n connected to the ring network 10 shown in the figure, the STN address (or even the IF address) to which the monitoring device is connected is not fixedly stored, unlike in the past. Therefore, S T N 11-1~1
1-n cannot recognize which station the monitoring device is connected to in an initial state such as when powering up or initializing, and as described below, the monitoring device (in this case, the monitoring device 15) cannot recognize which station the monitoring device is connected to. It is determined that the monitoring device does not exist until it is activated while connected to any STN.

In such a state, it is assumed that the monitoring device 15 is connected to the 1E12a of the 3TN 11-1 as shown in FIG. 1, and the monitoring device 15 is activated.

When the monitoring device 15 is started, first the connection destination 5TN11-
1 (IF12a) to request the transfer of connection destination address information, 1ms T N 11-1 < IF
12a) ir+ et S T N 11-1 and ll'
:12a address (STN address + IF address)
(Process P1 in FIG. 3). Next, the monitoring device 15 inputs the broadcast address into the destination address field D, the STN7 address (of the connected STN 11-1) obtained in process [] 1, and the (IF) address into the source address field SA.
12a), and a type code indicating a monitoring device connection notification is set in the type specification field.The frame 7'-ta in the format shown in FIG. 2(b) is used as a monitoring device disconnection notification. Connect as C to ST N11-
1 (process P2 in FIG. 3).

When the S T N 11-1 receives the frame data from the connected device (monitoring device 15 in this case), it refers to the type specification field and determines the connection between the monitoring device and the monitoring device, as in the monitoring device connection notification C in this example. If the frame data is for transmission, the same frame data is sent as is to the transmission path 13H. Further, the S T N 11-1 receives the same data since the destination address field DΔ of the frame r-1 is set to the address f for all +r1. When the S T N 11-1 recognizes the monitoring device connection notification from the type specification field in the received frame data, it detects that a monitoring device exists in the network system and sends address information (connection destination address) indicating the connection destination of the monitoring device. information) indicated by the source address field SA in the received frame data. In this case STN
11-1 is the content of the source address field SA in the received frame data, here 3 T N 11-1
and the IF address of the IF 12a) are registered in the internal memory as connection destination address information of the monitoring device (in this case, the monitoring device 15).

Now, the frame data as the monitoring device connection notification C (from the monitoring device 15) sent from the 3 T N 11-1 onto the transmission path 13 is transmitted to all other S T N 11-2 to 1
1-n and received in the same manner as s T N 11-1. In STN 11-2 to 1t-n, the presence of the monitoring device is recognized as in STN 11-1, and the source address field in the received frame data (monitoring device connection notification C) is recognized. Contents of SA (
STN address and IF address) are registered in the internal memory as connection destination address information of the monitoring device. From now on, each station 11-1 to 11-n uses the internally registered connection destination address information of the monitoring device (in this case, the monitoring device 15) as the destination address information, so that when an event such as an abnormality occurs, the monitoring device 15 Event information can be sent to. As a result, it becomes possible to collect event information from the monitoring device 15c and S T N 11-1 to 11-n.

Next, the monitoring device 15 uses the 5TN11-1 (IF12a)
The case where it is separated from the following will be explained. When the monitoring device 15 is disconnected from the connection destination STN, the connection destination 5TN1
1-1 (IF12a>), the destination address field DA contains the broadcast address, the source address field SA contains the STN address of the connection destination STN 11-1 and the IF address of 1F12a, and the type specification field contains the Frame data in the format shown in FIG. 2 (C) in which the type code indicating the monitoring device disconnection notification is set is sent to the connection destination 3 as a monitoring device disconnection notification.
11-1 (process P11 in FIG. 4). This frame data (monitoring device disconnection notification D) from the monitoring device 15 is similar to the case of the monitoring device connection notification described above.
It is received by TNs 11-1 to 11-n.

When the S T N 11-1 to 11-n recognize the monitoring device disconnection notification from the type designation field in the received frame data, the S T N 11-1 to 11-n select the S T
IF of T N (Here, 1F1 of 3 T N 11-1
It is determined that the monitoring device connected to 2a) is to be disconnected. In this case, 3TNs 11-1 to 11-n use the contents of the source address field SA in the received frame data (in this case, the STN address of 5TN 11-1) among the connection destination address information of the monitoring device registered in the internal memory. and ll:12a IF address) is deleted. From now on, 3 FN 11-1 to 11-r
+: Data transmission to the separated monitoring device is no longer performed.

Now, in this embodiment, the monitoring device 15 is 5TN11-1
In the state of the system shown in Figure 1 connected to 1F12a>, one more monitoring device @16 can be connected to another STN, for example 5TN11-3, as shown in Figure 5. In this case, similarly to the above-mentioned monitoring device 15, when the monitoring device 16 starts up, the S
Supervised by simultaneous broadcast to T N 11-1 to 11-n? J!
Sends device connection notification C and sends STN 11-1 to 11-n
By notifying the existence of the monitoring device @16 and its connection address information, from now on, each S engineering
−〇 enables data transmission such as event information to the monitoring device 16. Furthermore, it is clear that the monitoring device 16 can be disconnected from the 5T 111-3 by simultaneously broadcasting a monitoring device disconnection notification to the S T N 11-1 to 11-n.

In the above embodiment, an IF (IF) for connecting a bus network, a monitoring device, etc. to the ring network 10 is
interface), but 2 for each STN <station)
Although the case where three or more are provided has been described, the application can also be applied to a case where there are three or more, or a case where there is only one. However, if there is one interface, only the STN address is sufficient as the connection destination address information, and the IF address is not necessary.

[Effects of the Invention] As detailed above, according to the present invention, when the monitoring device is activated, each station can correctly recognize its connection destination by the notification from the monitoring device, so it can be used for monitoring @ Correct communication with the monitoring device is possible even if the connection destination of the device is not fixed. Therefore, relocation, addition of monitoring equipment,
Disconnection can be easily performed, and it is also possible to connect a plurality of monitoring devices independently, making it easy to perform maintenance work using the monitoring devices.

[Brief explanation of the drawing]

Fig. 1 is a block diagram showing an embodiment of a network system to which the present invention is applied, Fig. 2 is a diagram showing the format of frame data applied in the above system, and Fig. 3 is a processing procedure when starting a monitoring device. Figure 4 is a diagram showing the processing procedure when disconnecting the monitoring device, and Figure 5 is the diagram showing the processing procedure when disconnecting the monitoring device.
It is a diagram showing a state in which a monitoring device is added to the system shown in the figure. 10...Ring network, 11-1 to 11-n
...Station (STN), 12a, 12b-
! >Tough Ace (IF), 13...Transmission line, 15.4
6...Monitoring device, C...Monitoring device connection notification, D...
- Monitoring device disconnection notification. Applicant's representative Patent attorney Takehiko Suzue 1st day 2nd r 3rd Chopsticks 5F7

Claims (4)

[Claims] (1) In a ring network in which multiple stations are connected in a ring through a common transmission path, when a monitoring device that monitors various network conditions is activated while connected to one of the multiple stations. The monitoring device obtains destination address information from the destination station, and transmits a monitoring device connection notification with this address information set in the source address field from the monitoring device to each of the stations by simultaneous broadcasting, A method for connecting a monitoring device in a ring network, characterized in that each station is notified of the presence of the monitoring device and its destination address information. (2) The ring according to claim 1, wherein each station, upon receiving the monitoring device connection notification from the monitoring device, internally registers the connection destination address information in the notification. Monitoring device connection method in type network. (3) When the monitoring device is disconnected from the connection destination station, the monitoring device transmits a monitoring device disconnection notification with the connection destination address information set in the source address field to each of the stations by simultaneous broadcasting. A monitoring device connection system in a ring network according to claim 2, characterized by: (4) Upon receiving the monitoring device disconnection notification from the monitoring device, each station sends information that matches the connection destination address information in the disconnection notification from among the internally registered connection destination address information of the monitoring device. 4. A monitoring device connection method in a ring network according to claim 3, characterized in that: .