JPH02128596A - Data collecting system for remote supervisory system - Google Patents

Abstract

PURPOSE:To allow a central station to separately process synchronous and changing data by transmitting the synchronous and changing data to the central station after adding peculiar identification numbers to inputted synchronous and changing data at a slave telemeter station. CONSTITUTION:A slave-station telemeter 3 periodically samples collectively numerical data from a plant 8 and transmits the numerical data to a central- station telemeter 2 as periodical data through a communication line 4. When the numerical data of the plant 8 abruptly change, on the other hand, the abruptly changing data are transmitted to the central-station telemeter 2 independently from the synchronous data as changing data. When the changing data are transmitted, an identification number indicating either the synchronous data or changing data is contained in a trailer. Therefore, the central station can separately process the synchronous and changing data.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a data collection method in which a central station collects data collected by slave stations in a remote monitoring system, and particularly relates to a data collection method for plants that require remote monitoring. Regarding.

[Conventional technology]

Conventionally, when collecting data in this type of remote monitoring system, data collected periodically by slave stations and data collected when numerical values change suddenly are sent to the central station in the same format without distinction. Ta.

[Problem to be solved by the invention]

The conventional data collection method described above does not guarantee the consistency of sampling times of multiple pieces of data collected at the central station. Therefore, it is unsuitable for processing such as dynamic simulation that requires consistency in the sampling time of input data used.

[Means to solve the problem]

The data collection method of the remote monitoring system of the present invention includes a telemeter slave station and a central station that remotely monitors the telemeter slave station. The telemeter slave station adds a unique identification number to the change data and transmits the data to the central station, so that the central station distinguishes between the synchronized data and the change data and stores them in a storage device. It is characterized by

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a block diagram of an embodiment of a remote monitoring system to which the present invention is applied, and FIG. 2 is a diagram showing the format of numerical data transmitted from the slave station telemeter to the central station telemeter (in accordance with the present invention Fields that are not directly related are omitted). In FIG. 1, the slave station telemeter 3 is composed of a single telemeter or a plurality of telemeters.

The slave station telemeter 3 periodically samples numerical data from the plant 8 all at once, and sends this numerical data to the communication cycle I! 4 to the central station telemeter 2 as synchronized data.If the numerical data of the plant 8 suddenly changes, this rapidly changing data is sent to the central station telemeter 2 as change data independently of the synchronized data. Send data to. The data transmitted from the slave station telemeter 3 to the central station telemeter 2 is sent to the slave station number 11 as shown in FIG.
．． Item number 12 indicating the data item. A numerical value 13, a trailer 14, etc. are included, and the trailer 14 includes an identification number 15 indicating whether it is synchronized data or change data.

The central station telemeter 2 receives the data from the slave station telemeter 3 and sends it to the CPU of the central computer system 1 as is.
Send to 5. The CPU 5 receives the slave station number 111 of the received data.
The numerical value 13 is scaled and set in the data area on the main memory 6 for item number 12. Regarding this data area, a synchronization data area 9 and a change data area 10 are provided for each item, and the received data If is synchronous data, the converted data of number 13 is in area 9.1.
It is set to 0, but in the case of change data, it is set only in the change data area 10.

In the central office computer system 1, the values in the synchronized data area 9 are used for simulations that require consistency of data sampling times;
The data to be confirmed via is the data set in the change data area 10.

〔Effect of the invention〕

As explained above, the present invention adds a unique identification number to the synchronization data and change data input by the telemeter slave stations and transmits the data to the central station, and the central station transmits the synchronization data and change data. By storing data separately, the latest data is provided to the operator, while
This has the effect that consistency of sampling times of input data can be guaranteed for processing such as dynamic simulation.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of one embodiment of the present invention, and FIG. 2 is a block diagram of an embodiment of the present invention.
FIG. 2 is a schematic diagram showing the format of numerical data transmitted from the slave station telemeter 3 to the central station telemeter 2 in the illustrated embodiment. 1...Central office computer system, 2...
Central station telemeter, 3...Slave station telemeter, 4
...Communication line, 5...CPU, 6...
...Main memory, 7...Man-machine device, 8.
...Plant, 9...Regular period data area, 10...Change data area, 11...
...Slave station number, 12...Item number, 13...
...Number, 14...Trailer, 15...
...Identification number.

Claims (1)

[Claims] In a data collection method for a remote monitoring system that has a telemeter slave station and a central station that performs remote monitoring of the telemeter slave station, the telemeter slave station uniquely collects synchronization data and change data that are input to the telemeter slave station. A data collection method for a remote monitoring system, characterized in that the central station distinguishes between the synchronized data and the change data and stores them in a storage device by adding an identification number and transmitting the data to the central station. .