JPS63301699A - Remote supervisory system - Google Patents

Abstract

PURPOSE:To reduce the number of data lines used at the time of collecting information between supervisory stations by transmitting local station information to a remote station during an idle time from the transmission of a call signal to the transmission of a next call signal. CONSTITUTION:When the supervisory station X transmits the call signal (m) by the use of the data line M to the other supervisory station Y, the station Y transmits a response signal (n) by the use of another data line N to the station X. On the contrary, when the station Y transmits the call signal m' by the use of the data line N to the station X after the transmission of the response signal (n), the station X transmits a response signal n' by the use of the data line M after the transmission of the call signal (m) to the station Y. Thereby, a data delivery requiring the data line of four lines can be executed by two lines.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention relates to a remote monitoring system, and particularly to a remote monitoring system that functions favorably when two monitoring stations mutually collect information on the other monitoring station. .

[Conventional technology]

Conventionally, in this type of remote monitoring system, as shown in FIG. 3, one monitoring station X sends a calling signal m to a partner station (another monitoring station) Y using a data line M. ,
Response information n was collected using data line N. In addition, the monitoring station Y sends a calling signal m" to the other station (monitoring station) X using a data line N° of a different route, and collects response information n" using a data line M'. do,
This method was used.

[Problem that the invention seeks to solve]

However, in the above conventional example, both monitoring stations
A data line M is used to collect information held by each other.
, M', N, and N' were required.

Therefore, when exchanging information, the data collection function that is normally performed at the same time is significantly impaired.

[Purpose of the invention]

The present invention improves the disadvantages of the conventional example, reduces the number of data lines used when collecting information between monitoring stations, and thereby enables remote monitoring with a cylindrical configuration that reduces equipment investment. Its purpose is to provide a method.

[Means for solving problems]

In the present invention, in a remote monitoring system in which two monitoring stations connected via a data line mutually call each other's monitoring station and collect information on the other station, the time between sending out a calling signal and sending out the next calling signal is The configuration is such that information on the own station is sent to the other station during free time.

This aims to achieve the above-mentioned objective.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to FIGS. 1 and 2.

The embodiment shown in FIGS. 1 and 2 includes two monitoring stations X and Y, and two data lines M and N installed between the monitoring stations X and Y.

Now, when one monitoring station The configuration is such that the response signal n is sent using the response signal n.

Conversely, if monitoring station Y sends a paging signal m° using data line N after sending response signal n to monitoring station X, monitoring station After sending out the response signal n', the data line M is used to send out the response signal n'.

In this way, each of the monitoring stations X and Y dedicates one line as a signal sending circuit. That is, one line is used exclusively for sending a response signal and a calling signal to the other party's monitoring station, using free time that does not overlap. Therefore, there is an advantage that the calling signal and response signal between the monitoring stations, which conventionally required four lines, can be transmitted using two lines.

〔Effect of the invention〕

As described above, according to the present invention, it is possible to collect information in the opposite direction by utilizing the free time of the data line.
Therefore, it is possible to provide an unprecedented and superior remote monitoring system in which data transmission and reception, which conventionally required four data lines, can be accomplished with two lines.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention, FIG. 2 is an explanatory diagram of the operation of FIG. 1, and FIG. 3 is a block diagram showing a conventional example. X, Y...Monitoring station, M, N...Data line, m. m"...Call signal, n, n'...
...Response signal. Patent applicant: Japan Electric Co., Ltd. Figure 1 Figure 2

Claims (1)

[Claims] (1) In a remote monitoring system in which two monitoring stations connected via a data line call each other's monitoring station and collect information on the other station, the time between sending out a calling signal and sending out the next calling signal is A remote monitoring method that is characterized by sending information about your own station to the other station during free time.