JPH02202742A - Line supervisory system by polling - Google Patents

Abstract

PURPOSE:To bring supervisory data of each slave station into centralized supervision without a hindrance by operating automatically each station of a master station, a slave station and a sub-master station so as to be in the best supervisory state, at the time of starting the sub-master station as the master station, when a fault of a line is generated. CONSTITUTION:When a sub-station 20 is started at the time when a fault of a line is generated, first of all, in both a master station 10 and the sub-master station 20, when a data request d2 or d1 from other sub-master station or master station 10 is received, a data request d1 or d2 transmitted from the own station is stopped and only a receiving operation is executed. Also, each slave station 1-(n) executes separately the receptions in both the left and the right directions of all lines, and in the case the request d1 or d2 is received, supervisory data D of the own station is sent out in only the direction in which its data request comes. In such a way, when the sub- master station 20 is started as the master station 10 at the time when a fault of a partial line is generated, each station of the master station 10, the slave stations 1-(n) and the sub-master stations 20 can be operated automatically so as to be in the best supervisory state, therefore, supervisory data of each slave station of a radio line can be collected without a hindrance, and the supervisory performance can be improved.

Description

[Detailed Description of the Invention] [Summary] A data request d1 is sent to each slave station configuring a line in series with a master station, such as a wireless line, and each slave station receives monitoring data D of each station.
,~D7 is transmitted, received, and collected. When the line is disconnected, a standard is prepared to wake up and transmit data request d2 in the same way as the master station, and receive the monitoring data of each slave station. Regarding the line monitoring method using boring, in which a master station is installed to collect and monitor monitoring data, when the quasi-master station is started up in the event of a line failure, the master station, quasi-master station, and slave stations that make up the line are automatically set to the best The purpose is to operate the monitoring state so that the monitoring data of each slave station can be centrally monitored without any hindrance, and both the master station and quasi-master station receive data requests from other quasi-master stations or the master station. When a data request is received, there is a means [1] for stopping the data request being sent from the local station and only performing reception operation, and a means for each slave station to receive data in both the left and right directions of the line separately. Means for transmitting the own station's monitoring data only in the direction from which the data request has come [
2], even if the line is cut off due to a failure, the master station and quasi-master station automatically collect and monitor the monitoring data of each slave station.

If the network is further divided, the slave stations that cannot receive the request commands from the master station will be unable to be monitored. For this reason, there is a method in which multiple master stations are prepared, and when the line monitored by one master station is disconnected, another station on that line stands up as the master station, sends a data request command, and collects slave station data. is possible, but in this case, if only one part of the line, upstream and downstream, is disconnected,
The request commands and slave station data from the two parent stations collide, causing confusion in the line and making it impossible for both parent stations to perform normal monitoring. For this reason, each station must send or stop sending data to prevent line disruption.

[Industrial application field]

The present invention relates to a remote control monitoring device that collects and monitors monitoring data of each slave station on a wireless line to a master station, and in particular, the master station issues a data request command to each slave station in order to collect monitoring data of each slave station. This paper relates to a line monitoring method using boring, which collects data from each station and centrally monitors it. In the line monitoring method using boring, only one master station can be set on the line, and the line may be at fault.
-1) As shown in normal times, data requests did, d+z, (for Lz, each slave station S, sz, S3 unconditionally monitors its own station in both the left and right directions of the line) from the master station 10M on the left end of the line. It was transmitting data DI + Ih, 03. (3-1) Normal monitoring was carried out by a quasi-master station (a station prepared to stand up as a master station when the line was disconnected) 20M'
is installed at the right end of the line, the quasi-master station 20M' is the master station 10
Data request d14 of M and monitoring data D of slave stations S, ~S,
, ~D3 can be received together, so each slave station S1 . It is possible to monitor Sz and Ss.

If a line failure occurs and communication is interrupted in both the left and right directions between the slave stations St and S (3-2a), the quasi-master station 20M' is started up as the master station, and the master station By transmitting the data request d2 (3-2b) in the same manner as 10M, the sub-master station 20M' can monitor the slave station S:1.

[Problem to be solved by the invention]

However, in the normal case (3-3a), communication between slave station S2 and slave station S is interrupted only in the right direction, and in the left direction (3-3a), the sub-master station 20H
’ as the master station (3-3c), the master station 10M,
Child station S7. Data D is confused in slave station S2 3-3b),
Both the master station 10-1 and the semi-master station 20M' cannot perform normal monitoring.

In addition to the right direction between slave station S2 and slave station S3, slave station S
If the left direction between 2 and slave station S is interrupted (3-4
In a), when the quasi-master station 20M' is started up as the master station (3
-4b), the data D is confused in the slave station S2, and the master station 10M,
Semi-master station 20M' cannot perform normal monitoring (3-4c)
).

Therefore, if you want to monitor the system in the best possible condition, the master station 10M must judge the operation of each station based on the individual state of the line when the quasi-master station 20M' is started up as a master station.
In addition, if the master station 10M is started up by mistake, the sub-master station 20M
M' did not perform normal monitoring, and this caused a problem in that the master station 10M could not understand it. An object of the present invention is to automatically operate each station so that it is in the best monitoring state when the quasi-master station 20M' is started up in the event of a line failure.

[Means to solve the problem]

To solve this problem, refer to Figure 1 and refer to Figure 1.
When starting up 0, the first thing to do is ■master station 10. When both of the quasi-master stations 20 receive a data request dt or d from another quasi-master station 20 or the master station 10, they stop the data request d1 or d2 being sent from their own station and only perform the receiving operation. ■ Each slave station 1 to n performs reception in both the left and right directions of the line separately, and when receiving data request d or d2, sends its own monitoring data D only in the direction from which the data request came. This problem is solved by the configuration of the present invention in which the problem is transmitted.

In the principle diagram of FIG. 1 showing the configuration of the line monitoring system by boring of the present invention, 10 transmits a data request d to each slave station 1 to n in series forming the line. This is a master station that transmits and receives monitoring data D1 to D7 of its own station from stations 1 to n, and centrally monitors each slave station 1 to n by boring.

20 is a quasi-master station prepared to stand up as a master station and transmit a data request dz when a part of the line is disconnected.

1-,=n are each slave station installed in series with the master station 10 and the quasi-master station 20 and forming a line, and the master station 10 . It receives data requests dr and dt from the semi-master station 20 and sends back its own monitoring data D1 to D1 to the main station 10 or the semi-master station 20.

[Effect]

In the present invention, the above-mentioned state (3-3b), that is, the slave station S2
If only the right direction between and the slave station S is interrupted, and the left direction is normal, when the semi-master station 20 is started up as the master station,
The configuration of (2), that is, the master station 10. Both quasi-master stations 20 receive data requests d2 or d from other quasi-master stations 20 or master stations 10.
, by stopping the data request d or d2 being sent from the own station and performing only the receiving operation,
Since the master station 10 receives the data request d2 from the quasi-master station 20, the master station 10 stops sending its own data request d, and performs only the receiving operation. Therefore, the master station 10. Child station 1.
Confusion of data D in slave station 2 is avoided. In addition, in the above-mentioned state (3-4b), when in addition to the right direction between slave stations S2 and S3, the left direction between slave stations S2 and S1 is disconnected (3-4a ), when the quasi-master station 20 is started as the master station, the configuration of
When the slave station 2 receives a
receives the data request d1 coming from the left master station 10 and sends the monitoring data D2 to the left master station 10, and receives the data request d2 coming from the right sub-master station 20 and sends the monitoring data D2 to the right master station 10. Since the data is returned to the sub-master station 20, confusion of the data D2 in the slave station 2 is avoided and the problem is solved.

〔Example〕

FIG. 2 is a block diagram showing the configuration of a line monitoring system using boring according to an embodiment of the present invention, in which the master station 10 at the left end of the wireless line is the master station i, and the slave stations 1 to n are arranged such that n is 4. and the four slave stations 1 to 4 are slave stations S,.

St, Sol, and S4 are installed in series. The quasi-master station 20 is composed of a quasi-master station M,l between the slave stations S2 and S3, and a quasi-master station M2' at the right end of the line next to the slave station S4. Parent stations M and I are started up as parent stations, and send out a data request d2 in the same way as the leftmost parent station H. In the case of the embodiment shown in FIG. 2, slave station S3
Since the line is disconnected in the right direction between and slave station S4 and in the left direction between slave station S2 and slave station S, the data request d1 from the leftmost master station is transmitted to slave station S, St. , quasi-master station M, 1 slave station S3 can receive, but slave station S4' + quasi-master station M, l
In addition, the data request d2 from the rightmost quasi-master station h' can be received by the slave stations Ss, slave station Sj, quasi-master station M, and 1 slave station S2, but the slave station Sl+master station Unable to receive. Therefore, according to the configurations (1) and (4) of the present invention, the slave station S
t, St, when the semi-master station MI'+slave station S3 receives the data request d1 from the left master station H, the respective monitoring data D
+, Dt, D Ml, and D3 are sent to the left master station, where they are received and centrally monitored. In addition, slave station S4.
Child station S1. When the quasi-master station H5' and the slave station S2 receive the data request d2 from the right quasi-master station h', they send the respective monitoring data D4. DI D Ml, Dz to right semi-master station M2
1, and is received by the semi-master station h' and centrally monitored.

Therefore, there is no problem because the monitoring data of each slave station and the semi-master station M,/ which cannot be started up can be divided into the master station H and the semi-master station M2/ and monitored in the best condition.

〔Effect of the invention〕

As explained above, according to the present invention, when a quasi-master station is started up as a master station when a failure occurs in a part of the line, the master station, slave stations, and quasi-master stations are automatically set to the best monitoring state. Since the monitoring data of each slave station on the wireless line can be collected without any trouble, the monitoring performance can be improved.

[Brief explanation of the drawing]

Figure 1 is a principle diagram showing the configuration of a line monitoring system using boring according to the present invention. Figure 2 is a signal flow diagram showing the configuration of a line monitoring system using boring according to an embodiment of the present invention. Figure 3 is a diagram showing a conventional line monitoring system using boring. It is a signal flow diagram of a monitoring method. In the figure, 1 to n are slave stations, 10 is a master station, and 20 is a semi-master station. Figure 1 (3-2b) shows the configuration of the red elephant monitoring destination f5 by the polygon according to the present invention.Figure 1 (3-2b) )

Claims (1)

[Claims] Each slave station (1 to n) forming a line in series with the master station (10)
The master station (10) starts up when the line is disconnected according to the boring method in which a data request (d_1) is sent to the slave station, and the monitoring data (D_1 to D_n) of each station is sent, received, and collected from the slave station. In a line monitoring method using boring, in which a quasi-master station (20) is prepared to transmit a data request (d_2) and receive monitoring data of each slave station in the same way as in When starting up a station (20), both the master station (10) and the quasi-master station (20) receive a data request (d_2 or d_1) from another quasi-master station (20) or the master station (10). When receiving the data, the means [1] stops the data request (d_1 or d_2) being sent from the own station and performs only the receiving operation, and all of the slave stations (1 to n) are connected to both the left and right directions of the line. It is equipped with a means [2] that performs reception separately and, when receiving the data request (d_2 or d_1), sends the own station's monitoring data (D) only in the direction from which the data request came, and prevents the line from being disconnected due to a failure. Even when the master station (10) and sub-master station (20) automatically monitor data (1 to n) of each slave station (1 to n) without any trouble
A line monitoring method using boring, which is characterized by collecting and monitoring data (D_1 to D_n).