JPS61228742A - Remote supervisory and controlling equipment - Google Patents

Abstract

PURPOSE:To allow a control station to discriminate whether a cause to a fault exists by providing the 1st means circulating a diagnostic signal to check the presence of a fault of an equipment in the control station and the 2nd means checking whether the fault exists in an outgoing/incoming line or in the equipment to be controlled. CONSTITUTION:A logical section 9-1 of a control station equipment 1 turns on a loopback relay 10-1 to form the loopback state of the route A. Then the logical section 9-1 outputs a diagnostic signal to a modulation section 5-1 to detect the diagnostic signal subject to loopback via a hybrid transformer 11-1, an attenuator 12 and a demodulation section 6-1. When a fault exists, the route A loopback is released and it is discriminated that it is the fault of the control station equipment 1. When no fault exists, the route A loopback is released, the route B loopback is executed and the logical circuit 9-1 of the equipment 1 outputs a diagnostic signal during that time. When the logical circuit 9-1 detects a fault of a loopback signal of the diagnostic signal, it is discriminate as a fault of the line side of the incoming line 7 or the outgoing line 8 and when no fault is detected, it is discriminated as a fault of the equipment 2 to be controlled.

Description

[Detailed Description of the Invention] [Field of Application of the Invention] The present invention relates to a remote monitoring and control device consisting of a control center device and a controlled station device, and particularly when the cause of transmission abnormality exists in the control center device or the controlled station device. The present invention relates to a remote monitoring and control device suitable for determining whether a control center device is present in a transmission line connecting a control center device and a controlled center device.

[Background of the invention]

A remote monitoring and control device is a remote monitoring and control device that can be used to monitor and control devices from control center devices and controlled facility devices, as described in JgM-1337 (Japan Electrical Manufacturers Association standard) “Remote monitoring and control device for centralized control.” They are connected by a down transmission line (control data line from the control center to the controlled station) and an up transmission line (display data line from the controlled station to the control station).

Both the uplink transmission line and the downlink transmission line transmit control information and display information, and include error check codes for code detection. This error check code is tested in each receiving section of the control center device and the controlled center device, and if an abnormality occurs, an alarm is output to the outside.

If an abnormality is detected in the receiving section of the control center device, the abnormality is displayed and output to an abnormality indicator light provided in the control center device. Furthermore, if an abnormality is detected in the receiving section of the controlled station device, display information indicating the abnormality is transmitted from the controlled station device to the control center device via the uplink.

After detecting an abnormality, measures must be taken to investigate the cause, but the cause may lie in the upstream/downstream transmission lines, or may lie in the control center equipment and controlled center equipment. Yes. If the cause of the abnormality is in the control center equipment, it is relatively easy to determine that the cause of the abnormality is in the control center equipment because the control center is manned. However, if the cause of the abnormality is not in the control center equipment, a person must go to the unmanned controlled station to determine whether the cause of the abnormality is in the upstream/downstream transmission line or the controlled station equipment. Controlled station equipment shall be inspected. This makes it possible to determine for the first time whether the transmission line is abnormal or the controlled station equipment is abnormal. However, in normal cases, the person in charge of maintaining the transmission line and the person in charge of maintaining the equipment at the controlled station are different people, and the cause of the problem may not be known unless someone goes to the unmanned controlled station. There is room for cattle modification in terms of conservation. That is, in the conventional technology, it takes time to determine the cause of the abnormality and the restoration work, and it takes a large amount of time to completely restore the remote monitoring and control device.

In order to solve this problem, Nikkeiko V Cutronics, 1983
A method of identifying an abnormal section, such as a 100 Mbit/s ring network connecting a 12.5r helical network, has been proposed, but although the section can be identified, it is difficult to determine whether the controlled station equipment is abnormal or the transmission line is abnormal. I don't know.

[Purpose of the invention]

The present invention has been made in view of the problems of the prior art described above, and is a remote monitoring control system that allows a control center to determine whether the cause of an abnormality exists in a controlled station device, a transmission line, or a control device. The purpose is to provide equipment.

[Summary of the invention]

In the remote monitoring and control device of the present invention, when an abnormality is detected in the transmission code on the uplink or downlink transmission line, in the connection part between the control center device and the uplink or downlink transmission line,
A first means for returning an upstream signal to a downstream signal and forwarding a diagnostic signal to check whether there is an abnormality in the control center equipment; The present invention is characterized in that it includes a second means for returning the signal to an uplink signal and forwarding a diagnostic signal to check whether there is an abnormality in the upper line/downlink line or an abnormality in the controlled station equipment.

[Embodiments of the invention]

Hereinafter, the present invention will be explained in more detail with reference to embodiments shown in the accompanying drawings. As shown in Fig. 1, the control center equipment 1
is connected to the man-machine interface device 3, and in this man-machine interface device, the operator can:
Gives control commands and monitors status. Further, the control center device 1 is coupled to a controlled center device 2 via a downlink transmission line 7 and an uplink transmission line 8, and the controlled center device 2 is connected to a controlled system 4. Control center equipment 1
and the controlled station device 2 have logic units 9-1, 9-2, . and 9-2, respectively.
It is configured to include a modulator 5-1@5-2 and a demodulator 6-1 and 6-2. The return relay 10-1 is connected to the logic section 9-
1, and is normally off, and its contact connects the uplink 8 and the demodulator 6-1 as shown in the figure. Return I) When V-10-1 is turned on, the signal from modulator 5-1 is transferred to hybrid transformer 11-1.
The signal is then returned to the demodulator 5-2 via the amplifier 13.

This turnaround is hereinafter referred to as route A turnback. Also, the folding relay 10-2 is turned on/off by the logic section 9-2,
Normally, it is off, and the contact point is connected to the modulation section 5-5 as shown in the figure.
2 and uplink 8 are connected. Return relay 10-2
When turned on, the signal from the downlink 7 is looped back to the uplink 8 via the hybrid transformer 11-2 and the attenuator 12. This return will be referred to as route B return hereinafter.

FIG. 2 is a flowchart showing the operation of the logic section 9-1 of the control center device 1, and FIG. 3 is a flowchart showing the operation of the logic section 9-2 of the controlled center device 2. Next, regarding the case where the control center device 1 detects a reception abnormality, the second
This will be explained using the time chart shown in FIG.

The logic section 9-1 of the control center device 1 returns IJL/-10-
Turn on the switch to 1 to set route A loopback state. Next, the logic section 9-1 outputs a diagnostic signal to the modulation section 5-1, and further outputs the diagnostic signal to the hybrid transformer 11-1, attenuator 12, and demodulation section 6-1.
1, the returned diagnostic signal is tested. If there is an abnormality, route A loopback is canceled and it is determined that the control center device 1 is abnormal. If there is no abnormality, cancel route A loopback, send a line switching command to the controlled station device 2,
The return relay 10-2 of the controlled station device 2 is turned on. As a result, as shown in FIG. 3, loop) B loopback is executed, and during this time the diagnostic signal is again output from the logic circuit 9-1 of the control center device I. If the logic circuit 9-1 detects an abnormality in the return signal of this diagnostic signal, it determines that the abnormality is on the line side of the uplink 7 or downlink 8, and if no abnormality is detected, the controlled station equipment It is determined that there is an abnormality of 2. Here, in the controlled station device 2, as shown in FIG. 3, the diagnostic signal causes the route B to be
After continuing the loopback, it is restored.

The above is a case in which an abnormality is detected in the control center device 1. Next, a case in which an abnormality is detected in the controlled center device 2 will be explained using FIGS. 3 and 5. As shown in FIGS. 3 and 5, after the controlled station device 2 transmits a line switching command to the control center device 1, it returns to route B. After receiving the line switching notification output from the controlled center device 2, the control center device 1 performs exactly the same operation as when the control center device 1 detects an abnormality. That is, turnback 1JV-10-1
is turned on to enter the route A loopback state, a diagnostic signal is transmitted, the signal received in return is verified, and if there is an abnormality, it is determined that the control center device 1 is abnormal. Further, if there is no abnormality, route A loopback is canceled and a line switching command is sent to the controlled station device 2. Here, since the controlled station device 2 has already performed the route B loopback, this line switching command may be omitted. Next, a diagnostic signal is transmitted, and if there is an abnormality in the received diagnostic signal, it is determined that there is an abnormality on the line side, and if there is no abnormality, it is determined that the controlled station device 2 is abnormal. Here, in the controlled station device 2, after continuing the route B return for a time longer than the time tested by the diagnostic signal,
restore it. By doing this, it is possible to determine whether the cause of the code abnormality in transmission is on the equipment side or on the line side.

FIG. 6 summarizes this determination. As shown in the figure, for example, if a reception abnormality is detected at the control center and the return on route A is normal and the return on route B is abnormal, the cause of the abnormality is in the upstream transmission line. Further, if no abnormality is detected in route A or route B after a reception abnormality is detected at the controlled station, the cause of the abnormality is in the controlled station equipment.

In this way, the cause of the abnormality is quickly determined and the result is displayed as an alarm, thereby contributing to the investigation of the cause of the abnormality and countermeasures.

〔Effect of the invention〕

According to the present invention, when an abnormality is detected in a transmission code, it is possible to determine whether the cause of the abnormality is on the line side or on the equipment side without dispatching a person to the controlled facility. Search and recovery can be performed quickly, and the maintainability of the system can be improved.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an embodiment of the remote monitoring and control device of the present invention, FIG. 2 is a flowchart showing the operation of the control point device shown in FIG. 1, and FIG. 4 and 5 are time charts for explaining the operation of the embodiment shown in FIG. 1,
FIG. 6 is an explanatory diagram showing the determination result of the cause of the abnormality. 1... Control center device, 2... Controlled center device, 3...
Man-machine interface R14...Controlled system, 5-1.5-2...Modulation circuit, 6-1.6-
2... Demodulation circuit, 7... Downlink, 8... Uplink, 9-1.9-2... Logic circuit, 10-1... Return relay, 10-2... Return relay, 1i-i,
11-2... Hybrid transformer, 12... Attenuator, 13... Amplifier.

Claims (1)

[Claims] 1. In a remote monitoring and control device in which a control center device and a controlled facility device are connected by an uplink transmission line that transmits uplink signals and a downlink transmission line that transmits downlink signals, the uplink transmission line or the downlink transmission line If an abnormality is detected in the transmission code on the line, the uplink signal is folded back to the downlink signal at the connection between the control center equipment and the uplink/downlink transmission line, and a diagnostic signal is forwarded to determine whether there is an abnormality in the control center equipment. The first means for checking whether there is an abnormality or a problem in the uplink or downlink is performed by returning the downlink signal to the uplink signal and forwarding the diagnostic signal at the connection between the controlled station equipment and the uplink/downlink transmission line. A remote monitoring and control device comprising: second means for checking whether there is an abnormality in the control center device.