JPH03213027A - Remote monitor control method - Google Patents

Abstract

PURPOSE:To improve the maintenance performance by increasing the collection speed of a state data such as alarming information with high real time performance. CONSTITUTION:In the case of the receipt of a sent state data signal, a master station ST 1 sends back the same signal to a slave station ST 3. The slave station ST 3 receives a signal from the master station ST 1 and compares it with a signal sent from its own station and when the same signal is confirmed, the transmission of the above-mentioned state signal is stopped, but when they differs from each other, the signal is sent again. The retransmission time is decided optionally at every station. The state data is collected by the contention system as above and other numeral data are collected by a polling system. Thus, the collection time of the state data with high real time performance is shortened.

Description

[Detailed Description of the Invention] [Table of Contents] Overview Industrial Field of Application Prior Art (Figures 6 to 8) Means for Solving the Problems to be Solved by the Invention (Figure 1) Working Examples (Figures 2 to 5) Effects of the invention [Summary] Regarding the remote monitoring and control method, it is possible to improve the maintainability of the system by increasing the collection speed of status data such as alarm information with high real-time performance. With the aim of In a remote monitoring and control method that monitors and controls the , is configured to be performed by interrupt processing.

[Industrial application field]

The present invention relates to a remote monitoring and control method, and more specifically,
This method is used in remote monitoring and control of digital multiplex radio systems, etc., and in particular, relates to a remote monitoring and control method that allows status data (condition monitoring items) such as alarm information to be collected in real time and improves maintainability. .

[Conventional technology]

In recent years, for example, for remote monitoring and control equipment in digital multiplex wireless systems, the number of status monitoring items (alarm information indicating either abnormality or normality, etc.) has increased as the system has expanded and become more multifunctional. The introduction of items (numerical data such as voltage levels) is strongly required.

The above-mentioned status monitoring items require more real-time performance in order to quickly notify maintenance personnel of abnormalities in each system component device.

On the other hand, numerical monitoring items are not so urgent because they can be checked during regular maintenance or when something goes wrong. Therefore, there is a need for a remote monitoring and control method that skillfully combines the two types of monitoring items with different characteristics as described above.

By the way, a conventional remote monitoring and control method for a digital multiplex radio system, etc. is as follows.

Fig. 6 is an explanatory diagram of the conventional polling method, and Fig. 7 is an explanatory diagram of the conventional polling method.
FIG. 8, an explanatory diagram of conventional polling-based monitoring and control, is a diagram showing a conventional signal format. In the figure,
STI is the master station, ST2 to STn are slave stations, P2 to Pn are polling, A2 to An are responses, F is a flag, A is an address, Fe2 is a frame check sequence, and ■ indicates the type of polling signal.

Conventional remote monitoring and control methods are all based on the polling method, and from the set master station STI, the slave station ST2
~Sequentially polling P2, P3, P4, - for STn
------- Perform Pn.

For the above polling P2 to Pn, each slave station ST2 to
In STn, responses A2, A3, A4, etc. regarding the status of the own station, etc.
---------Return A n to the master station STI. Master station ST1
Now, by collecting the responses A2 to An, the slave stations ST2 to STn are monitored and controlled.

The signal formant used at this time is as shown in FIG. That is, in polling P2 to Pn, flag F, address (station number assigned to each station) A1, polling type I, and frame check sequence FC3 are used.
, using a polling signal consisting of flags F, the response A2~
In An, a response signal consisting of flag F, address, status data, numerical data, frame check sequence FC3, and flag F is used.

In addition to monitoring by polling as described above, the master station ST
Various M controls are performed from I to slave stations ST2 to STn, and this control is performed as follows.

For example, as shown in FIG. 7, polling P2 is performed and there is a response A2 to this, and then polling P3 is performed and there is a response A3 to this.

After this response A3, control from the master station STI to the slave station ST2 is performed by interrupt processing in normal polling. This slave station 2 is controlled, and when there is a response to this control, normal polling P4 is performed again, and monitoring by polling is performed in the same manner.

[Problem to be solved by the invention]

The above-mentioned conventional devices had the following drawbacks.

That is, status data and numerical data are placed in the same position, and data for all items is sent for each poll.

For this reason, the frame length becomes long, and it takes too much time to collect data. Therefore, there is a drawback that the collection speed of real-time state data (state monitoring items) is too slow.

An object of the present invention is to eliminate such conventional drawbacks and improve the maintainability of the system by increasing the collection speed of status data such as alarm information with high real-time properties.

[Means to solve the problem]

FIG. 1 is a diagram illustrating the principle of the present invention, in which (A) is an explanatory diagram of a method of collecting state data, (B) is a frame format of a state data signal, (C) is a diagram of an explanatory diagram of a method of collecting numerical data, (
D) is a diagram showing a frame format of a response signal (numeric data signal).

In order to achieve the above object, the present invention provides one master station ST.
In a remote monitoring and control method that monitors and controls multiple slave stations ST2 to STn, state data (binary data) such as alarm information with high real-time performance is collected using a contention method, and other numerical values such as voltage levels are collected using a contention method. Data (multi-valued data) is collected using the same polling method as before, and when controlling the slave stations ST2 to STn from the master station STI, it is now done by interrupt processing to polling when collecting the numerical data. This is what I did.

[Effect]

Since the present invention is configured as described above, it has the following effects.

Now, if an alarm occurs in slave station ST3, at that point, it independently creates a status data signal with the own station's status data inserted using the frame format shown in Figure (B), and sends the signal from slave station ST3. .

At this time, since multiple stations may be transmitting signals at the same time, check the signal transmission status of other stations before transmitting the signal of your own station (each station checks the status of other stations).

When the master station STl accepts the sent status data signal, it sends back the same signal to the slave station ST3. The slave station ST3 receives the signal from the master station STI, compares it with the signal sent from its own station, and when it is confirmed that the signal is the same, stops sending the status data signal. If different, resend. This retransmission time is arbitrarily determined for each station.

As described above, the status data is collected by the contention method, but other numerical data is collected by the polling method shown in FIG.

First, the master station STI sequentially polls the slave stations ST2 to STn P2, P3, P4, --------Pn
In response, each slave station sends responses A2, A3, A
By returning a, -.-An, the master station STI collects numerical data.

The frame format of the signal used for this response is (D)
As shown in the figure, only numerical data has been inserted.

Furthermore, when controlling the slave stations ST2 to STn from the master station STI, interrupt processing is performed for the polling P2 to Pn.

By doing the above, the time required to collect highly real-time state data can be shortened. In addition, with only the contention method, if a slave station is unable to send out a status data signal due to a failure, the master station STI cannot recognize it, but polling accesses each station at regular intervals, so
Since the master station STI can grasp the non-responsive status (failure, etc.) of the slave station, effective remote monitoring and control is possible by using the contention method and the polling method together.

〔Example〕

Embodiments of the present invention will be described below based on the drawings.

2 to 5 are diagrams showing one embodiment of the present invention, and FIG. 2 is a block diagram of a supervisory control device in a master station;
Figure 3 is a block diagram of the supervisory control device in the slave station.
The figure is a time chart for remote monitoring control, and FIG. 5 is a configuration diagram of a data channel.

In the figure, l is the status data section, 2 is the numerical data section, and 3 is the MU
X, 4 is a buffer, 5 is a display section, 19 is a switch (SW
), 6 is a communication LSI, 7 is a data return determiner, 8
9 is a display output circuit, 9 is a non-response determining unit, 10 is a polling sending unit, 11 is a line status detector, 12 is a data sending unit,
13 is a return data determination unit, 14 is a state change detection circuit, 15 is a self-station state data collection circuit, 16 is a response transmitter,
Reference numeral 17 indicates a station number determiner, and reference numeral 18 indicates a local station numerical data collection circuit.

Further, TXD indicates transmission data, and RXD indicates reception data.

This embodiment is an example of a remote monitoring and control method in a digital multiplex radio system, and like the conventional example described above, the system is composed of one master station and a plurality of slave stations.

As the state data (binary data), for example,
Numerical data (multi-valued data), such as data indicating whether the device is in an alarm state or a normal state when a failure occurs (alarm/normal), or data indicating whether the device is in an operating state or stopped state (operating/stopped), etc. Examples include data indicating a voltage level or data indicating an error rate.

In the master station, the status data section 1 is provided with a communication LSI 6, a data loopback judgment section 7, and a display output circuit 8, and the numerical data section 2 is provided with a communication LSI 6, a no-response judgment section 9, and a polling transmitter 10. , a display section 5, a buffer 4, a switch 19, a MUX 3, etc. are provided.

In addition, in each slave station, the status data section 1 includes a communication LSI,
A line state detection section 11, a data transmission section 12, a return data determination section 13, a state change detection circuit 14, and an own station state data collection circuit 15 are provided.
I6, a response transmitter 16, a station number determiner 17, and a own station numerical data collection circuit 18 are provided, as well as a MUX 3.

The processing of the slave station with the above configuration is as follows.

In the status data section 1, the own station status data collection circuit 15 collects and understands various status signals within the own station.

If there is a state change, the state change detection circuit 14 detects it and issues a data sending request signal to the data sending unit 12.

Thereafter, the line status detection unit 11 confirms that no other slave station is using the line, and if the line is not in use, sends a signal to the data sending unit 12.

When the data sending unit 12 receives the signal from the sending unit, the data sending unit 12 receives the status data (
TXD) is transmitted via the communication LSI 6 and MUX 3.

Next, return data (RX D) is received from the master station, but if it is not received within a certain period of time, it is retransmitted.

When return data is received, the return data determination unit 13 determines whether it matches the sent status data or not. If they match, the retransmission of the status data is stopped, and if they are different, it is retransmitted. I do.

The numerical data section 2 receives the polling signal from the master station and sends a response signal to the master station.

At that time, first, the polling signal from the master station is sent to MUX3,
The polling signal (RXD) taken into the numerical data section 2 via the communication LSI 6 is determined by the station number determiner 17 whether or not it is addressed to the own station.

If it is addressed to the local station, the response sending section 16 is activated, the numerical data collected by the local station numerical data collection circuit 18 is taken out, and a numerical data signal (TXD) is sent to the master station.

Further, the processing of the master station is performed as follows.

In the status data section 1, the received data (RXD) taken in via the MUX 3 and the communication LSI 6 is used to
State data is entered. At this time, the data return determiner 7 sends back to the slave station the same status data (TXD) as the status data sent from the slave station.

Thereafter, if the same status data is not sent again within a certain period of time from the slave station that sent the status data, the status data is sent to the display output circuit 8.

The display output circuit 8 sends the above state data via the buffer 4 to the display unit 5 for display.

Further, in the numerical data section 2, the polling transmitter 10 sequentially polls the slave stations. Regarding the resulting response signal from the slave station, the response non-response determining section 9 detects the non-response.

The received data (RXD) received by the numerical data section 2 is sent to the display section 5 via the buffer 4 and displayed. At this time, the buffer 4 is switched by a switch (SW) 19.

Collecting state data using the contention method described above is as follows:
This will be done at the timing shown in Figure 4.

For example, at times tlxt2, t4-t5, and t7-te, the polling signals are P2, P3, P4----'
- Suppose it is issued as follows.

Response signals A2, A3, A4 for this
- indicates time t2-t3, t5-t6, t8-, respectively.
Issued at t9・-1---.

Therefore, time t3-t4, ts-t? ------
--- is the time T during which polling is not performed, so during the time T, the numerical data channel can be used as a status data channel.

If this time T is used to send the status data using the contention method, data collisions can be prevented.

Further, the configuration diagram of the data channel is as shown in FIG.

The numerical data channel is a channel for polling, and as described above, when it is not used between polls (time T), it can also be used as a channel for status data.

Note that the status data channel is a contention channel, so if there is no status data such as an alarm in any slave station, nothing is transmitted.

Although examples have been described below, the present invention can also be implemented as follows.

(1) It is applicable not only to digital multiplex radio systems but also to other similar systems (analog radio systems, wired communication systems, etc.).

(2) Status data may include not only alarm information, data on operation, stop, etc., but also other urgent data.

〔Effect of the invention〕

As explained above, the present invention has the following effects.

(1) State data such as alarms that should be communicated to maintenance personnel.
It can be collected in real time without depending on the presence or quantity of numerical data (numeric monitoring items).

(2) Since status data can be collected quickly, current line and equipment status can be quickly and accurately communicated to maintenance personnel.

Therefore, maintainability in various systems such as digital multiplex radio systems can be improved.

[Brief explanation of drawings]

FIG. 1 is a diagram showing the principle of the present invention, FIGS. 2 to 5 are diagrams showing one embodiment of the present invention, FIG. 2 is a block diagram of a supervisory control device in a master station, and FIG. FIG. 4 is a block diagram of the supervisory control device at the station, a time chart for remote supervisory control, and FIG. 5 is a configuration diagram of the data channel. FIG. 6 is an explanatory diagram of a conventional polling method, FIG. 7 is an explanatory diagram of monitoring and control by conventional polling, and FIG. 8 is a diagram showing a conventional signal format. S T 1-m = Master station ST2-STn...-Slave station F---Flag A-Address (station number of slave station) Fe2-Frame check sequence

Claims (1)

[Claims] In a system configured with a master station (ST1) and a plurality of slave stations (ST2 to STn), state data such as alarm information generated in each slave station in the master station (ST1), In a remote monitoring and control method for monitoring and controlling each slave station by collecting other numerical data, the above status data is collected by a contention method, the above numerical data is collected by a polling method, and the master station ( A remote monitoring and control method characterized in that control of slave stations (ST2 to STn) by ST1) is performed by interrupt processing in response to polling during numerical data collection.