JPH02219352A - Telemeter device - Google Patents

Abstract

PURPOSE:To improve reliability by performing the analysis of the status of input data before and after when state change occurs in the data. CONSTITUTION:When the state change (abnormality) occurs in the data, a slave station Ti transmits state change occurrence information to a master station M, and also, the scanning of the data after generating the state change on a first memory circuit 7 is started. Also, when the state change information from the slave station Ti is received, the data of (0-n) to 0 is preserved in a second memory circuit 16 by transmitting polling request information to the slave station Ti, and the data of 0 to (0+n) is preserved in a second memory circuit 17, and as a result, the data before and after generating the state change can be preserved. Thereby, the analysis of the status before and after generating the state change of the data is performed at the second processing part 15 of the station M at need.

Description

[Detailed Description of the Invention] [Purpose of the Invention (Industrial Application Field) The present invention provides a system in which a telemeter master station and a telemeter slave station are 1:n (n is an integer of 1 or more) using a subscriber line network and a dedicated line.
The present invention relates to a telemeter device using a polling digital transmission method, and particularly relates to a telemeter device that can grasp in detail the situation before and after a state change (abnormality) occurs in constantly input data.

(Prior Art) In recent years, in the field of information transmission, telemeter devices using a polling digital transmission method using subscriber line networks and dedicated lines have been widely used.

This telemeter device uses polling requests from the master station several times an hour or several times a day.
Generally, the system is such that input data (saved data) from the slave station is constantly transmitted. In this type of telemeter device, state changes (
It does not have a function to constantly scan and transmit input data when an abnormality occurs. Therefore,
Even if a state change occurs in the constantly input data, it cannot be detected immediately, and even if it can be detected, the situation up to the state change (before the state change occurs) can be detected.・Cannot be analyzed.

Therefore, in order to grasp the situation before and after the occurrence of a state change in the input data, especially before the occurrence of a state change, it is possible to adopt a cyclic digital transmission method (CDT) using a dedicated line. If there are a large number of stations in a remote area, the line usage charges will be enormous, and even if a dedicated line is used, if there are n (n is an integer greater than or equal to 1) slave stations for one master station, the status Collecting continuous data to analyze relevant data before and after a change occurs requires extremely high-speed data transmission. On the other hand, it is possible to provide a fixed measurement transmission function for specified input items after a state change occurs, but it is not possible to collect detailed changes in related data before a state change occurs.

(Problems to be Solved by the Invention) As described above, the conventional telemeter device has the problem that when a state change (abnormality) occurs in constantly input data, it is only possible to grasp the situation before and after the change in detail. there were.

SUMMARY OF THE INVENTION An object of the present invention is to provide a highly reliable telemeter device that can grasp in detail the situation before and after a state change (abnormality) occurs in constantly input data.

[Structure of the Invention] (Means for Solving the Problems) In order to achieve the above object, in the present invention, a telemeter master station and a telemeter slave station using a subscriber line network and a dedicated line are arranged in a 1:n (n is 1 In a telemeter device using a polling digital transmission system with an integer greater than or equal to determine whether an abnormality) has occurred,
A function of transmitting information to the telemeter master station when a state change occurs, and starting scanning of data after the state change occurs to the first data storage means, and polling from the telemeter master station. The telemeter slave station is equipped with a first processing means having a function of transmitting data to the telemeter master station upon request, and a second data storage means for storing data transmitted from the telemeter slave station upon a polling request; A function that upon receiving status change occurrence information from a telemeter slave station, requests the telemeter slave station to poll the stored data, and stores data from before the status change occurs to after the status change occurs in the second data storage means. , and, if necessary, a second processing means having a function of at least analyzing the situation before the occurrence of a state change, in the telemeter master station.

(Function) In the telemeter device of the present invention, input data that can be arbitrarily specified in the telemeter slave station is normally stored for an arbitrary period and at an arbitrary cycle, and in response to a polling request from the telemeter master station, the input data that can be arbitrarily specified in the telemeter slave station is The stored data is being transmitted to the telemeter master station. On the other hand, when a status change (abnormality) occurs in this constantly input data, the telemeter slave station starts scanning the data after the status change occurs, and at the same time, status change occurrence information is transmitted from the telemeter slave station to the telemeter master station. Ru. When the telemeter master station receives the status change occurrence information from the telemeter slave station, it sends a polling request to the telemeter slave station for saved data, so that the data from before the status change to after the status change is sent to the telemeter slave station. The data is transmitted from the station to the telemeter master station, and this data is stored in the telemeter master station. As a result, the telemeter master station constantly analyzes the status of input data before a state change occurs, as necessary.

(Example) The present invention will be described below with reference to an example shown in the drawings.

FIG. 1 is a schematic diagram showing an example of the overall configuration of a telemeter device using a subscriber line network according to the present invention.

In FIG. 1, a plurality of slave stations T1 to Tn each transmit various data via a subscriber line network N, and a master station M receives the various data. In addition, slave station T1
-Tn are connected to various measuring instruments 81-Sn, respectively, and various measurement data are sent to slave stations T0-Tn.

Furthermore, the master station M includes a central processing unit (CPU, not shown).
, an operation console, etc. are connected to it, and data is output.

FIG. 2 is a block diagram showing a specific embodiment of the telemeter device according to the present invention. In the figure, n slave stations are represented by TI.

In FIG. 2, the slave station Ti includes an input circuit 1, an output circuit 2, an input control circuit 3, an output control circuit 4, a first processing section 5, and a first storage circuit 6.7. , a transmitting circuit 8,
A modulation circuit 9, a transmission switching circuit 10, a demodulation circuit 11,
A receiving circuit 12 is also provided. In addition, in the master station M,
Output circuit 13, computer output circuit 14, second processing section 15, second storage circuit 16, 17, transmission circuit 18, modulation circuit 19, transmission switching circuit 20, demodulation circuit 21
and a receiving circuit 22.

Here, the input circuit 1 and the output circuit 2 are various measuring instruments 8
Measurement data is input and output between the terminals 1 to 1 to Sn, respectively. The input control circuit 3 and the output control circuit 4 exchange input and output data based on control information of the first processing section 5 and the like. The first processing unit 5 has a function of constantly storing input data that can be specified arbitrarily in the telemeta slave station Ti in the first storage circuits 6 and 7 at an arbitrary period and at an arbitrary cycle, and has a function of always storing input data in an arbitrary cycle and a state change (abnormality) in the input data. If a state change has occurred, it outputs information (alarm) to that effect to the telemeter master station M, and also outputs the state change occurrence to the first storage circuit 7. It has a function of starting scanning of subsequent data, and a function of outputting data to the telemeter master station M based on polling request information from the telemeter master station M. The transmitting circuit 8 transmits data from the slave station Ti, and the modulating circuit 9. The signal is transmitted to the master station M via the transmission switching circuit 10 and the subscriber line network N. Also, from the master station M to the subscriber line network N.

The polling request information etc. transmitted via the transmission switching circuit 10 is converted into a signal by the demodulation circuit 11 and the receiving circuit]2
and outputs it to the first processing section 5.

On the other hand, the output circuit 13 and the computer output circuit 14 output data to a central processing unit and an operator console, respectively, which are not shown. The second processing unit 15 has a function of storing data transmitted from the telemeta slave station Ti in accordance with polling request information in a second storage circuit 16.17.
When the status change occurrence information is received from the telemeter slave station Tj, the data storage polling request information is output to the telemeter slave station Tj, and the data from before the status change occurs to after the status change is stored in the second storage circuit 16. 17, and, if necessary, at least a function to analyze the situation before a state change occurs. The transmission circuit 18 is for transmitting polling request information, and includes a modulation circuit 19, a transmission switching circuit 20. The data is transmitted to the slave station Ti via the subscriber line network N. In addition, slave station T1
Data transmitted from the terminal via the subscriber line network N and the transmission switching circuit 20 is converted into a signal by the demodulation circuit 21, received by the reception circuit 22, and output to the second processing section 15.

Next, we will discuss the operation of the telemeter device of this embodiment in the third section.
This will be explained using the flowchart shown in the figure.

In FIG. 2, the slave station Ti normally operates for an arbitrary period (
Input data from (0-n) to 0 minutes of n) and (0-2n)
The input data up to (0-n) minutes are stored in the first memory circuit 6.
7 respectively. In addition, the master station M transmits polling request information to the slave station Ti at regular intervals (for example, several times an hour or several times a day), thereby storing the polling request information in the first memory of the slave station T1. The stored data stored in the circuit 6.7 is transmitted to the master station M and stored in the second storage circuit 16.17, respectively.

Then, in the master station M, this data is output to a central processing unit, an operator console, etc. (not shown).

On the other hand, when a state change (abnormality) occurs in this data, the slave station Ti transmits state change occurrence information to the master station M, and scans the data after the state change occurs to one first storage circuit 7. is started. Also, on the main station M,
Upon receiving status change occurrence information from slave station Ti, slave station T
By sending polling request information to i, the second storage circuit 16 stores data from (0-n) to 0, and the second storage circuit 17 stores data from O to (0+n). Data is saved, and as a result, data from before the state change occurs to after the state change occurs is saved.

Thereby, the second processing unit 15 of the master station M analyzes the situation before and after the data state change occurs, as necessary.

As described above, in the telemeter device of this embodiment, the slave station Ti is equipped with the first storage circuits 6 and 7, and the telemeter device is always used for an arbitrary period (
Since the latest data is scanned in step n), it is possible to secure timely data before a state change (abnormality) occurs. Furthermore, when a data state change (abnormality) occurs, the data after the state change is scanned for one of the first memory circuits 7, so that the data can be retrieved in a timely manner after the state change has occurred. It is also possible to secure it. Furthermore, since the master station M is provided with the second memory circuit 16, 17, it is possible to analyze the situation before and after the occurrence of a state change, if necessary. As a result, with conventional telemeter devices, even if a change in data status (abnormality) occurs during the process, it cannot be detected immediately, and it is difficult to understand the situation. With the telemeta device of this embodiment, it is possible to secure data before the occurrence of a state change, and it is possible to analyze the situation as necessary.

[Effects of the Invention] As explained above, according to the present invention, when a state change (abnormality) occurs in constantly input data, an extremely reliable telemeter that can grasp the situation before and after the change in detail is provided. Equipment can be provided.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing an example of the overall configuration of a telemeter device using a subscriber line network according to the present invention, FIG. 2 is a block diagram showing a specific embodiment of the telemeter device according to the present invention, and FIG. It is a flow diagram for explaining the operation in the example. M... Master station, T1-Tn... Slave station, N... Joining line network, 81-Sn... Measuring instrument, 1... Input circuit, 2
... Output circuit, 3... Input control circuit, 4... Output control circuit, 5... First processing section, 6, 7... First storage circuit, 8... Transmission circuit , 9... Modulation circuit, 10
...Transmission switching circuit, 11...Demodulation circuit, 12...
Receiving circuit, 13... Output circuit, 14... Computer output circuit, 15... Second processing section, 16.17... Second
18... Transmission circuit, 19... Modulation circuit, 20... Transmission switching circuit, 21... Demodulation circuit, 22
...Receiving circuit.

Claims (1)

[Scope of Claims] In a telemeter device using a polling digital transmission method in which a telemeter master station and a telemeter slave station are 1:n (n is an integer of 1 or more) using a subscriber line network and a dedicated line, a first data storage means for constantly storing input data that can be specified for any period of time and at any period; and determining whether or not a state change (abnormality) has occurred in the constantly input data, and when a state change has occurred. In addition to transmitting information to that effect to the telemeter master station,
a first processing means having a function of starting data scanning after a state change occurs in the data storage means of the telemeter master station, and a function of transmitting data to the telemeter master station in response to a polling request from the telemeter master station; In preparation for the telemeter slave station, a second data storage means for storing data transmitted from the telemeter slave station in response to a polling request, and upon receiving status change occurrence information from the telemeter slave station,
A function of making a polling request for stored data to the telemeter slave station and storing the data from before the occurrence of the state change to after the occurrence of the state change in the second data storage means, and if necessary, at least the data before the occurrence of the state change. A telemeter device characterized in that the telemeter master station includes a second processing means having a function of analyzing a situation.