JPH0695689B2 - Monitoring information transmission method - Google Patents

Description

The present invention relates to a surveillance information transmission system, and more particularly to a surveillance information transmission system for a 1 to N data transmission system in which a 1 to N master station and slave stations are connected in a loop. Regarding

[Conventional technology]

Conventionally, as shown in FIG. 3, this type of monitoring information transmission system has one master station 21 having a network monitoring device 20 and N
The individual stations 22 (1) to 22 (N) are connected in a loop, and the slave stations 22 (1) to 22 (N) are polled by the master station 21.
Was a method of transmitting.

That is, as shown in FIG. 4, the individual polling frame C including the individual polling signal section C ₁ , the address section C ₂ , the information section C _3, and the check sequence section C ₄ is transmitted from the master station 21 to the slave station 22.
(1) through 22 sequentially transmitted (N), the address unit C ₂ slave station 22 is designated by (1) when the (-22 (N)) has received the dedicated polling frame C, the specified child Station 22 (1)
(-(22 (N)) holds the monitoring information stored in the information section C ₃ of the individual bowling frame C and transmits it to the master station 21.

[Problems to be Solved by the Invention]

The above-mentioned conventional monitoring information transmission method uses the slave stations 22 (1) to 22
When (N) puts the monitoring information on the information section C ₃ of the individual bowling frame C and transmits it to the master station 21, the slave stations 22 (1) to 22 (22)
Since all the monitoring information held by (N) is sent in the information section C ₃ and transmitted, the frame length of the individual polling frame C becomes long and the master station 21 generates the monitoring information. It takes a long time to understand the slave station 22 (1) (to 22 (N)) and the content of the monitoring information. As a result, there is a drawback that the response time from generation of monitoring information to output of information from the network monitoring device 20 becomes long.

An object of the present invention is to solve the above-mentioned conventional problems and provide a monitoring information transmission system capable of shortening the response time from the master station to the generation of monitoring information.

[Means for Solving the Problems]

The present invention, a master station and a plurality of slave stations are connected in a loop,
A monitoring information transmission method in which monitoring information generated in a slave station is transmitted to a master station via an individual polling frame, and each slave station can display the presence / absence of monitoring information of its own slave station from the master station. An individual polling frame is transmitted, and when an individual polling frame having a display indicating that monitoring information has been generated is received, a simultaneous polling frame is transmitted to all slave stations, and the monitoring information generating slave station sends its own slave station to the simultaneous polling frame. Is transmitted, and the master station which receives the simultaneous polling frame transmits an individual polling frame for carrying detailed data of the monitoring information to the monitoring information generating slave station.

〔Example〕

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

FIG. 1 is a block diagram showing a monitoring information transmission system according to an embodiment of the present invention.

The monitoring information transmission method is based on the master station 1 and the slave stations 2 (1) to 2 (N).
And are connected in a loop, and the master station 1 to the slave stations 2 (1) to 2
An individual polling frame and a general polling frame are transmitted to (N), and the summary data and the detailed data are parented from the slave stations 2 (1) to 2 (N) corresponding to the individual polling frame and the general polling frame. This is a method for promptly discovering the slave station generating the monitoring information and responding to it by sending a reply to the station 1.

The master station 1 includes an individual polling frame generator 3 that generates an individual polling frame, a general polling frame generator 4 that generates a general polling frame, and a transmitter that transmits these individual polling frames or general polling frames to a slave station. 5, a receiving unit 6 that receives the individual polling frame or the simultaneous polling frame returned from the slave stations 2 (1) to 2 (N), and a predetermined polling frame or a simultaneous polling frame received by the receiving unit 6 The recognition unit 7 for recognizing and the network monitoring device 8 for inputting the data of the individual polling frame or the simultaneous polling frame of the receiving unit 6 are provided.

As shown in FIG. 2A, the individual polling frame generator 3 has an information part (hereinafter referred to as DSRQ) a ₁ , an address part a ₂ , an individual polling signal part a ₃ and an information part a ₄ which indicate the generation of monitoring information. And a check sequence section a ₅ generate an individual polling frame a and output it to the transmitting section 5.
When the DSRQ part a ₁ of the individual polling frame a has the content of “0”, it indicates that the monitoring information is not generated,
This is a portion indicating that the monitoring information is generated when it has the content of "1". The address part a ₂ is a part for displaying a slave station which polls by the individual polling frame a. Information unit a ₄ is a portion slave station indicated by the address part a ₂ is put the monitoring information.

As shown in FIG. 2 (c), the simultaneous polling frame generator 4 generates a simultaneous polling frame b composed of DSRQb ₁ , address part b ₂ , polling signal b ₃ , information part b ₄ , and check sequence part b _5. It is generated and output to the transmission unit 5. In the address part b ₂ of the simultaneous polling frame b,
It contains information indicating that the polling frame b is returned to all the slave stations without specifying the slave stations. Information unit b ₄ is a portion put the summary data of the slave station.

The recognition unit 7 recognizes the DSRQ of the input individual polling frame a.
It has a function of operating the simultaneous polling frame generator 4 based on a ₁ and a function of operating the individual polling frame generator 3 based on the information part b ₄ of the simultaneous polling frame b. Specifically, the individual polling frame a
When DSRQa ₁ of “1” indicates “1”, the simultaneous polling frame generation unit 4 is operated to execute the simultaneous polling frame b.
When the information part b ₄ of FIG. 2 has summary data as shown in FIG. 2 (d), as shown in FIG. 2 (e), an individual polling frame specifying the slave station carrying the summary data is generated. Then, the individual polling frame generator 3 is operated.

As shown in FIG. 1, the slave stations 2 (1) to 2 (N) are monitored by their own slave stations and a receiver 9 for receiving the individual polling frame a or the simultaneous polling frame b from the master station 1. DSRQ of individual polling frame a when information occurs
a DSRQ setting unit 10 for changing the display of a ₁ to “1”, a summary data generation unit 11 for putting summary data indicating its own station on the information section b ₄ of the simultaneous polling frame b, and an individual polling frame for the own station The detailed data generator 12 for placing detailed data on the information part a _{4 of a} , the individual polling frame a or the simultaneous polling frame b from the DSRQ setting unit 10, the summary data generator 11 and the detailed data generator 12 is sent to the master station 1. And a transmitter 13 for transmitting.

When the received individual polling frame a is for another slave station, the receiving unit 9 receives the individual polling frame a.
When the simultaneous polling frame b is output to the DSRQ setting unit 11, the simultaneous polling frame b is output to the summary data generating unit 11 and the received individual polling frame a
Has a function of outputting the individual polling frame a to the detailed data generating section 12 when it is for its own slave station.

Next, the operation of this embodiment will be described.

First, the master station 1 sends an individual polling frame a for the slave station 2 (1) to the slave station 2 (1) by a normal polling sequence (FIG. 2 (a)).

If the monitoring information is generated only in the slave station 2 (K) and the monitoring information is not generated in the other slave stations, the individual polling frame a is transmitted through the slave stations 2 (1) to 2 (K-1) Figure 2 (a)
It is received by the slave station 2 (K) in the frame state shown in FIG.

The individual polling frame a is received by the receiving unit 9 of the slave station 2 (K).
And is output to the DSRQ setting unit 10. DSRQ setting section 10
As shown in FIG. 2 (b), and outputs to the transmitting unit 13 after setting the display of "1" to DSRQa ₁ individual polling frame a.

The individual polling frame a sent from the sending unit 13 is
It is output to the recognition unit 7 received by the reception unit 6 of the master station 1.

The recognition unit 7 recognizes the DSRQ of the input individual polling frame a.
Recognize that the monitoring information is generated in the slave stations other than the slave station 2 (1) based on a ₁ . As a result, the master station 1 becomes the slave station 2
It is possible to quickly know that the monitoring information is generated in any of the slave stations without waiting until the polling of (K). After the recognition, the recognition section 7 operates the simultaneous polling frame generation section 4 and outputs the simultaneous polling frame b shown in FIG. 2C to the transmitting section 5 in preference to the individual polling frame.

The simultaneous polling frame b transmitted from the transmission unit 5 and reaching the slave station 2 (K) is transmitted via the reception unit 9 to the summary data generation unit.
Enter in 11.

The summary data generator 11 puts the summary data on the information part b ₄ of the input simultaneous polling frame b as shown in FIG. 2D and outputs it to the transmitter 13. This summary data at least indicates that the slave station that generated the monitoring information is the slave station 2 (K).

The receiving unit 6 which has received the simultaneous polling frame b from the transmitting unit 13 outputs the simultaneous polling frame b to the recognition unit 7 and also outputs the content of the summary data of the information unit b ₄ to the network monitoring device 8.

The recognition unit 7 recognizes the monitoring information generating station 2 (K) from the summary data of the information unit b ₄ . As a result, the master station 1 can know that the slave station that generated the monitoring information is the slave station 2 (K). After the recognition, the recognition unit 7 causes the individual polling frame generation unit 3 to operate, and as shown in FIG.
The individual polling frame a for the slave station 2 (K) is transmitted by the transmission unit 5
Output to.

The individual polling frame a from the transmitter 5 to the slave station 2 (K) is input to the detailed data generator 12 via the receiver 9. As shown in FIG. 2 (f), the detailed data generation unit 12 puts detailed data showing the details of the monitoring information of the slave station 2 (K) on the information unit a ₄ of the individual polling frame a and transmits it.
Output to 13.

The individual polling frame a from the transmission unit 13 is received by the reception unit 6 of the master station 1 and input to the network monitoring device 8. As a result, the master station 1 becomes the network monitoring device 8
Can send predetermined information corresponding to the detailed data from the slave station 2 (K).

〔The invention's effect〕

The monitoring information transmission method of the present invention is configured as described above, and the master station can quickly grasp the slave station that generated the monitoring information and the content of the monitoring information, and as a result, the network monitoring device. The information output from the device will be faster and the man-machine interface can be improved.

[Brief description of drawings]

FIG. 1 is a block diagram showing a supervisory information transmission system according to an embodiment of the present invention, and FIGS. 2 (a) to (f) are diagrams showing contents of a frame transmitted by the supervisory information transmission system of FIG. FIG. 3 is a block diagram showing a conventional monitoring information transmission system, and FIG. 4 is a diagram showing a frame transmitted by the monitoring information transmission system of FIG. 1 …… Master station 2 (1) to 2 (N) …… Slave station 3 …… Individual polling frame generator 4 …… Simultaneous polling frame generator 10 …… DSRQ setting unit 11 …… Summary data generator 12 …… Detailed data generator

Claims (1)

[Claims] 1. A monitoring information transmission method in which a master station and a plurality of slave stations are connected in a loop, and the monitoring information generated in the slave station is transmitted to the master station via an individual polling frame. From the station, each slave station transmits an individual polling frame that can display the presence or absence of monitoring information of its own slave station, and when receiving an individual polling frame with a display indicating that monitoring information has occurred, all slave frames receive the simultaneous polling frame. To the monitoring information generating slave station, the monitoring information generating slave station puts summary data for identifying its own slave station in the simultaneous polling frame, and the monitoring information generating slave station receives monitoring information from the master station receiving the simultaneous polling frame. A monitoring information transmission method characterized by transmitting an individual polling frame for carrying detailed data of the above.