JPH0265416A - Standby line connector for station monitoring system - Google Patents

Abstract

PURPOSE:To reduce cost required for the utilization of a public network while simplifying a system constitution by giving a telephone number to a MODEM so as to generate a call to the public network when a telephone number of a monitoring object station corresponding to the active line whose fault occurrence is confirmed. CONSTITUTION:When a telephone number of a monitoring object station corresponding to the active line confirmed by a fault occurrence line confirming means for the occurrence of a fault is read from a telephone number storage means 14, a MODEM control means 10 gives a telephone number to a MODEM 16 to generate a call to a public network. Thus, the utilizing time of the public network is limited to be a period when the monitoring object station is a connection party when the fault takes place in the active line. Thus, the number of MODEMs is saved to reduce the cost required for the utilization of the public network while simplifying the system constitution.

Description

[Detailed Description of the Invention] Industrial Application Fields Prior Art Problems to be Solved by the Invention Means for Solving the Problems Effects of the Invention [li Required] A polling method is adopted for monitoring each station, In a station monitoring system where the public network is used as a protection line for the working line, it is possible to reduce the cost required for using the public network while simplifying the system configuration by connecting the equipment used to connect the protection line. 3. Detailed Description of the Invention Means for confirming, by external notification, a line in which a failure has occurred among the working lines leading to Wi number of monitoring target stations. Then, the means of specifying each monitoring bureau as a connection partner as a connection partner, the means of reading the telephone number of the specified monitoring target station specified as the connection partner, and the current duty that has been confirmed to be the occurrence of a disability, and the surveillance target station that corresponds to it. and means for providing the telephone number to a modem to initiate a call to the public network when the telephone number is retrieved.

[Industrial Field of Application] The present invention is applied to a device used to connect the protection line in a station monitoring system in which a polling method is adopted for monitoring each station and the public network is used as a protection line for the working line. .

In FIG. 4, the slave station Sl is located further away from the master station.

S2...Sn is monitored, and slave station 51°S2
...Sn is controlled between master stations as necessary.

In order to improve the reliability of these slave station monitoring and control,
1. There is a working line 400 between S2...Sn and the master station.
-1,400-2...400-n and protection line 4
02-1, 402-2...402-n are provided.

And working line 400 = 1.400-2...400-
n is highly reliable, and the backup line 402-1402-2...
・If 402-n is used infrequently, protection lines 402-1.402-2...4, which are as reliable as working lines 400-1.400-2...400-n, are used.
Using 02-n becomes unnecessary.

So, preliminary episode &! 402-1, 402-2...40
A public network is used as S1.2-n, and the master station M has slave stations S1. Connect the backup line in Figure 5 to call S2...Sn! A device 50 is provided.

[Prior Art] In FIG. 5, the protection line connection device 50 has a working line 4
00-1.400-2-...400-n failure information 5
00 (disconnection information) and monitoring control information 18502 of slave stations Sl, S2...Sn are given, and modems 52-1, 52-2,...δ2-n are connected to the backup line connection device 50. ing.

The modems 52-1, 52-2, . . . 52-n are connected to the public network 402, and serve as slave stations Sl.

S2...Sn is modem 52-L 52-2-...
Public by 52-n! 111402, respectively.

These slave stations S1. A polling method is also adopted for calling S2...Sn, and therefore, the polling destination slave stations S1. S2...Sn are sequentially designated by the protection line connection device 50.

Here, one of the current times & 1400-1,400-2
...Fault information 50 indicates that a fault has occurred in 400-n.
0 is confirmed by the backup line connection device 50, the corresponding modem 52-1, 52-2... or 52-n is activated, and
And the current episode &! 400-1.400-2--- or 400
-n is connected to the failed slave station Sl, S2, . . . , or Sn via the public network 402.

These are working lines 400-1, 400-2... or 4
00-n is connected until it is restored, and during that time, the public network 402 is used to monitor and control the slave stations Sl, S2, .

[Problems to be Solved by the Invention] However, in the past, a dedicated modem was installed at the monitoring station for each cycle to be monitored, so the number of modems required for backup line connection was limited to the number of modems required for the monitoring station. As the number increases, it becomes necessary to run a line to each modem.

In addition, even if a monitored station with a failure in the working line is not designated as a polling destination, it will remain connected to the public network until the working line is restored, so the costs required to use the public network cannot be overlooked. becomes.

The present invention has been made in view of the above-mentioned conventional circumstances, and
The purpose is to provide a standby line connection device for a station monitoring system, which makes it possible to reduce the number of modems and make the system configuration suitable for PJ business while reducing the cost required for using the public network.

The telephone number of the corresponding monitored station is stored in the T-talk number storage means 14.
When the telephone number is read from the telephone number, the telephone number is given to the modem 16 to generate a call to the public network.

[Means for Solving the Problems] In order to achieve the above object, the device according to the present invention has the following features:
It is configured as shown in the figure.

In the faulty line confirmation means 10 shown in the figure, a line in which a failure has occurred among the working lines leading to each of a plurality of monitoring target stations is confirmed by an external notification.

The polling destination designation means 12 sequentially designates each monitoring target station as a connection partner.

Further, the telephone number storage means 14 stores in advance the telephone number of each monitored station, and the telephone number of the monitored station designated as a connection partner by the polling destination designation means 12 is read from the telephone number storage means 14.

Then, in the modem control means 18, the occurrence of a fault is connected to the working line confirmed by the faulty line confirmation means 10. [Function] In the present invention, the modem 16 common to each monitored station is used to monitor each monitored station using the public network. used.

In addition, from the time the telephone number of the monitored station where a fault has occurred on the working line is read until another monitored station is designated as the connection partner, the monitored station and modem 16 at that time are
Since the stations are connected via the public network using the readout telephone number, the usage time of the public network is limited to the period when the station to be monitored at that time becomes the connection partner in the event of a failure in the working line.

[Embodiments] Hereinafter, preferred embodiments of the apparatus according to the present invention will be described based on the drawings.

Second [! ! In slave station S1. S2...Sn and the master station M are each provided with a transmitting/receiving device 205.20M and a variable vR device 22S, 22M, and the master stations can monitor and control the slave stations Sl, S2...Sn. A wireless line 400 is used as a working line.

In order to monitor and control these slave stations S1, S2, . . . S2・
...The information 502 provided in Sn and master station M, and used for monitoring and controlling slave stations, is different! l! l device 225.
22M and supervisory control devices 245 and 24M, respectively.

An alarm signal 200 roughly indicating the occurrence of a failure in the wireless working line 400 is given to the demodulators t22s, 22Mb) and the supervisory control unit 245.24M, and from the supervisory control unit 245.24M to the slave station side backup line connection device. 26S,
Information 500 related to a fault in the working line and slave station monitoring control information 502 are provided to the main station protection line connection device 26M.

And the backup line connection device 269.26M is a modem 16S
, each connected to IBM, modem 169.16M
are each connected to a public network 402.

Figure 3 shows a backup line connection device 26M installed in the master station M.
The configuration of the supervisory control device 2 in FIG.
4M fault information 500 is given to the faulty line confirmation circuit 10.

Further, the slave station monitoring control information 502 of the monitoring control device 24M is R
The polling destination address contained in the information 502, which is given to the modem controller via the AM 30 on the 1st day, is extracted by the polling destination specifying circuit 12.

The polling destination address extracted by the polling destination identification circuit 12 is given to the telephone number ROM 14,
The telephone number ROM 14 contains each polling destination address and each slave station S1. S2...Sn telephone numbers are written in correspondence.

In addition, the polling destination address extracted by the polling destination identification circuit 12 is also given to the faulty line confirmation circuit vM10, and the faulty line confirmation circuit 10 uses the working line 1J400-1.400, which has been confirmed to have a fault based on the fault information 500. −
2-- or slave stations SL, S2, corresponding to 400-n.
- Or, when the bonong destination address of s3 is given, a control tnt'# command to the modem controller 18 is obtained.

Since the control 11 command is given, the telephone number corresponding to the current polling destination address is stored in the telephone number ROM 14.
from the modem controller 18, and the modem 16
Control of M is started.

That *J! In ll, the polling destination slave station S1. S2
...or the modem 18S installed in Sn
A call is first made using the telephone number of the OM 14, and both modems IBM, 16S are connected via the public network 402.

And the data in RAM30 is 16M for both modems.

163 leap, and the master station M uses the public network 402 to send the slave station Sl, S2... or Sn that has a line failure.
monitoring and control.

Further, when the polling destination specifying circuit 12 gives the next bonning destination address to the failed line confirmation circuit 10, the slave station monitoring and control using the public M4402 is interrupted.

After that, the slave station S1 where the line failure occurred. The polling destination address of S2... or Sn is polling destination specific circuit 1
2 to the fault @ line confirmation circuit 10, the slave station S1. Monitoring and control of S2... or Sn is restarted, and the above operations are repeated until the line is restored.

As explained above, according to this embodiment, the public network 402 (
All slave stations S1. Since one modem IBM is commonly used for monitoring and controlling S2...Sn, the number of modems and the number of telephone lines can be significantly reduced.

Further, according to the present embodiment, the slave station S1 where a line failure has occurred.
S2...Monitoring using Sn public network.

Since control is limited to the inter-polling intervals assigned to each slave station Sl, S2, . . . Sn, public network connection time can be significantly reduced.

Therefore, it is possible to reduce the cost required for using the public network while converting the system configuration to IJ.

[Effects of the Invention] As explained above, according to the present invention, a common modem can be used for each slave station to connect to each monitoring target station via the public network as a protection line, and Since the use of the network is limited to the polling period of the station where the line failure has occurred, it is possible to simplify the system configuration and reduce the cost required to use the public network.

[Brief explanation of the drawing]

Fig. 1 is an explanatory diagram of the principle of the invention, Fig. 2 is an explanatory diagram of the configuration of the circuit monitoring system, Fig. 3 is an explanatory diagram of the configuration of the protection line connection device, Fig. 4 is an explanatory diagram of the configuration of the IQl monitoring system, and Fig. 5 is an explanatory diagram of the configuration of the IQl monitoring system. is an explanatory diagram of the configuration of the master station. 10 ・ ・ 12 ・ ・ 16M. 20M. 22M. 24M. 26M. 30th item 400 ・ 402 ・ M・ ・ ・ Sl, S ・Faulty line confirmation circuit, ・Polling destination identification circuit, ・Telephone number ROM. 18S...Modem, ・Modem controller, 2O5...Transmission/reception! 22S...Modification rA device, 24S...Monitoring control #device, 28S...protection line connection device, NARAM. ...Wireless working line, ...Public network, master station, 2...Sn...Slave station. Figure: Explanatory diagram of the configuration of the protection line connection device Figure 3

Claims (1)

[Scope of Claims] Faulty line confirmation means (
10), polling destination designating means (12) for sequentially specifying each monitoring target station as a connection partner, telephone number storage means (14) for reading out the telephone number of the monitoring target station specified as a connection partner, and Modem control means (18) that, when the telephone number of the monitored station corresponding to the working line in which the occurrence has been confirmed is read out, gives the telephone number to the modem (16) to generate a call to the public network;
A standby line connection device for a station monitoring system, comprising: