JPH08205257A - Remote power control method and remote supervisory and control system with the method applied to - Google Patents

Abstract

PURPOSE: To provide a remote supervisory control system with which a fault caused by a software can be speedily recovered even if the fault is generated in the control part of a remote device to be supervised. CONSTITUTION: When any fault occurs inside a control part 4A of a device 1A to be supervised, at a central supervising and controlling device 81 to which a signal 104A showing abnormality at the control part 4A is transmitted through a communication control part 21A of a supervising device 2A by a control state detecting part 22A, it is confirmed by a signal 104B that a device 1B is normally operated and as down data 107, a signal 105 for controlling the ON/OFF of the power source of the control part 4A is transmitted through a supervising device 2B and a transmission line 9B. At a power source control signal output part 5B to which a signal 108 is transmitted from a communication control part 42B receiving the down data 107 through a modem 71B, a signal 109 is transmitted to a power source control part 32A of a power source part 3A and as a result, the ON/OFF of power supply from a power source supply part 31A to the control part 4A is controlled by the power source control part 32A.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote power control system for monitoring and controlling a plurality of remote monitoring and control devices, which are mainly composed of monitoring devices and monitored devices connected by a transmission line and are duplicated. The present invention relates to a control method and a remote monitoring control system to which the control method is applied.

[0002]

2. Description of the Related Art Conventionally, in a remote monitoring control system of this type, a monitored device constituting a remote monitoring control device and a monitoring device use a control section operated by predetermined software (S / W). The monitoring device and the monitoring device perform data measurement, state monitoring control, communication control, and the like. Since these control units are central to the distant monitoring control device, a watchdog timer circuit that monitors the operating state of the control unit and performs recovery processing in case of abnormality occurs is provided as necessary. There is.

Incidentally, the remote monitoring control device disclosed in Japanese Patent Laid-Open No. 63-234798 discloses a technique for resetting the control unit of the monitored device by the monitoring device when the control unit is abnormal.

[0004]

In the case of the remote monitoring control device in the above-mentioned remote monitoring control system, when a failure due to software (S / W) occurs in the control unit of the monitored device, the watchdog timer circuit restores it. Since the processing is not properly operated due to noise from the outside or timing of the input signal, the control unit itself may run out of control. In such a case, even if the technique of resetting the control unit of the monitored device by the monitoring device is introduced, the control unit of the monitored device cannot reset without receiving the reset signal from the monitoring device, and finally, It is necessary to reset the control unit of the corresponding monitored device in the field for restoration processing. That is, in the conventional distant monitoring control system and its restoration method, there is a problem that the time loss becomes large if the monitored device in which the fault has occurred is far away in order to recover the fault promptly.

The present invention has been made in order to solve such a problem, and its technical problem is to quickly and even if a software-induced failure occurs in a control unit of a distant monitored device. It is to provide a remote power control method that can be restored reasonably and a remote monitoring control system to which the remote power control method is applied.

[0006]

According to the present invention, a monitored device, which includes a control unit and a power supply unit for supplying power to the control unit, and a monitoring device are connected to each other by different transmission lines and are duplicated. When the central monitoring control device monitors and controls a plurality of distant monitoring control devices, the monitoring device side determines the state of the control unit based on the result of constantly monitoring the operating state of the control unit. At the same time, the central supervisory control device side determines whether or not the power supply is turned off / on in the power supply unit according to the result of detecting the state of the control unit. There is provided a remote power control method for controlling the power supply unit from normal to abnormal according to the result of the determination to control the power supply to the control unit to be turned on and off.

On the other hand, according to the present invention, the monitored device including the control unit and the power supply unit for supplying power to the control unit and the monitoring device are connected to each other through different transmission lines and are duplicated. In a distant monitoring control system consisting of a distant monitoring control device and a central monitoring control device that monitors and controls a plurality of distant monitoring control devices, the monitored device constantly monitors the operating state of the control unit and outputs a state monitoring signal. Monitoring unit,
The monitoring device detects a state of the control unit based on the state monitoring signal and outputs a control state detection signal,
The central supervisory control device includes a power supply operation determination unit that outputs a power supply off / on control signal indicating a result of determining whether the power supply unit is powered off / on according to the control state detection signal. The power supply control signal output unit that outputs the power supply control signal that controls the power supply unit from normal to abnormal according to the power supply OFF / ON control signal obtained through the operation determination unit, and the power supply unit is the power supply control signal. According to the above, there is obtained a remote monitoring control system including a power supply control unit that controls the power supply to the control unit to be turned on and off.

Further, according to the present invention, in the above distant monitoring control system, the status monitoring signal is transmitted as rising data from the monitored device to the monitoring device through the transmission line, and the power supply on / off control is performed. A distant monitoring control system is obtained in which signals are transmitted as down data from a monitoring device to a monitored device via a transmission path.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A remote power control method of the present invention and a distant monitoring control system to which the remote power control method of the present invention is applied will be described in detail below with reference to the drawings.

First, the outline of the remote power control method of the present invention will be briefly described. According to this remote power control method, a plurality of remote monitoring control devices in which a monitored device including a control unit and a power supply unit that supplies power to the control unit and a monitoring device are connected to each other by different transmission lines and are duplexed. When the central supervisory control device monitors and controls, the monitored device side detects the state of the control unit based on the result of constantly monitoring the operating state of the control unit on the monitored device side, and the central supervisory control device side controls the control unit. By determining whether to turn the power off and on in the power supply unit according to the result of detecting the status of the power supply unit, the power supply unit from the normal to the abnormal Is controlled to turn on / off the power supply to the control unit.

That is, in the case of this remote power control method, the monitored device itself monitors the operating state of the control unit, and based on the result, the monitoring unit detects the state of the control unit of the monitored device, Based on the result of detection of the control state on the supervisory control device side, it is determined whether or not the power supply to the power supply unit for supplying power to the control unit of the monitored device can be turned off / on, and the abnormal power supply unit on the monitored device side Is controlled by a normal monitored device, even if a software-based failure occurs in the control unit of a distant monitored device, there is no need to reset the control unit of the corresponding monitored device on site. The failure can be quickly and reasonably restored.

FIG. 1 is a block diagram showing the basic configuration of a remote monitoring control system according to an embodiment to which this remote power control method is applied.

This remote monitoring and control system comprises a first system K
A distant monitoring control device composed of the first and second systems K2,
It comprises a central supervisory control unit 81 for supervising and controlling these distant supervisory control units. Here, in the remote monitoring control device of the first system K1, the monitored device 1A including the control unit 4A and the power supply unit 3A that supplies power to the control unit 4A and the monitoring device 2A are connected by the transmission line 9A, and The remote monitoring control device of the second system K2 is redundant, and the monitored device 1B including the control unit 4B and the power supply unit 3B that supplies power to the control unit 4B and the monitoring device 2B are connected by the transmission line 9B. It has been duplicated.

Of these, each monitored device 1A, 1B has
In addition to the control units 4A and 4B and the power supply units 3A and 3B described above, measurement control units 6A and 6B to which data signals used for measurement control are respectively input, and communication data signals processed by the control units 4A and 4B. The modulation / demodulation devices 71A and 71B for modulating and demodulating the respective signals and the operation statuses of the control units 4A and 4B are constantly monitored to monitor the status signals 102A and 102A.
The state monitoring units 43A and 43B that output 2B are the control units 4
It is provided in A and 4B. The monitoring devices 2A and 2B have modulation and demodulation devices 72A and 72A that modulate and demodulate the modulation and demodulation data signals transmitted via the transmission lines 9A and 9B for communication again.
72B, communication control units 21A and 21B for communication-controlling each modulation / demodulation data signal and outputting measurement value data signals 103A and 103B, and each state monitoring signal 102A, 10B.
Control state detection units 22A and 22B for detecting the states of the respective control units 4A and 4B based on 2B and outputting control state detection signals 104A and 104B are provided. A power supply operation determination unit (not shown) that outputs to the central supervisory control device 81 a power supply off / on control signal 105 indicating the result of determining whether or not the power supply units 3A and 3B can be turned off / on according to the control state detection signals. ) Is provided.

Further, the power-off / on-control signal 105 and the power-off / on-control signal 1 are sent to the respective monitoring devices 2A and 2B.
06 as the monitored devices 1A, 21B via the communication control units 21A, 21B and the modulation / demodulation devices 72A, 72B, respectively.
Control signal transmitters 23A and 23B for transmitting to the 1B side are provided, and each of the monitored devices 1A and 1B has a power-off / on-control signal 105 which is obtained through the power-supply operation determination unit regarding an abnormal one. A power supply control signal output unit 5 that outputs a power supply control signal 109 for controlling a power supply unit from a normal power supply to an abnormal power supply according to a communication power supply off / on control signal 108 for which the on control transmission signal 106 is used for communication.
A and 5B are provided.

Further, each power source unit 3A, 3B has a control unit 4
Power supply units 31A, which supply power to A and 4B, respectively.
In addition to 31B, power supply control units 32A, 3 for controlling the power supply to the respective control units 4A, 4B by the power supply units 31A, 31B in accordance with the power supply control signal 109.
2B is provided, and the control units 4A and 4B include measurement signal processing units 41A and 41B that process data signals from the measurement control units 6A and 6B, respectively, in addition to the state monitoring units 43A and 43B. , Communication control units 42A, 42B for inputting the data signals processed for the respective measurement signals and the respective status monitoring signals 102A, 102B and processing them for communication, respectively.

That is, in this distant monitoring control system, each distant monitoring control device has the same hardware (H / W) and software, and each state monitoring signal 1
02A, 102B are transmitted as data 101A, 101B via the transmission lines 9A, 9B, and each monitored device 1A, 1B.
Is transmitted to each monitoring device 2A, 2B from
Each power off / on control signal 105 is lowered and data 107
As monitoring devices 2A, 2B via transmission lines 9A, 9B as
Is transmitted to each of the monitored devices 1A and 1B.

Therefore, first, the normal operation of such a remote monitoring control system will be briefly described. In each monitored device 1A, 1B, the data signal from each measurement control unit 6A, 6B is processed by the measurement signal processing unit 41A, 41B in each control unit 4A, 4B, and the communication control unit 42A,
42B. In addition, the device state monitoring units 43A and 43B that constantly monitor the operating states of the control units 4A and 4B send the state monitoring signals 102A and 102B in the normal state to the communication control unit 4.
2A, 42B is transmitted. Each communication control unit 42A, 42B
Then, the measurement data from the measurement signal processing units 41A and 41B and the state monitoring signals 102A and 102B in the normal state from the device state monitoring units 43A and 43B are used for communication. In each of the modulation / demodulation devices 71A and 71B, each transmission line 9A, Upstream data 101A and 101B are continuously transmitted to the monitoring devices 2A and 2B via 9B. In each of the monitoring devices 2A and 2B, the measured value data signals 103A and 103B are transmitted to the central monitoring control device 81 by the communication control units 21A and 21B via the modulation / demodulation devices 72A and 72B.
In A and 22B, a control state detection signal 104 indicating a normal state of each control unit 4A and 4B in each monitored device 1A and 1B.
A and 104B are transmitted to the central monitoring control device 81.

Incidentally, the modulation / demodulation devices 71A, 71 here
A publicly known technique can be used for the configuration of the B / modulation / demodulation devices 72A and 72B and the transmission lines 9A and 9B.

Next, the operation of the distant monitoring control device of the first system K1 when a failure due to software occurs in the control unit 4A of the monitored device 1A will be described. That is, the obstacle here is the transmission line 9A and the modulation / demodulation devices 71A, 72 with respect to the remote monitoring control device of the first system K1.
There is no problem in A, and the upstream data 1 from the monitored device 1A
01A is not transmitted, or the status monitoring signal 10 relating to the control unit 4A of the monitored device 1A in the upstream data 101A.
The case where 2A is abnormal is shown.

In such a case, the control state detecting section 22A transmits a control state detection signal 104A indicating an abnormality as a detection result of the state of the control section 4A to the central monitoring control device 81 via the communication control section 21A. When the control state detection signal 104A indicating an abnormality is transmitted, the central supervisory control device 81 confirms from the control state detection signal 104B that the monitored device 1B is operating normally, and the control signal transmission unit 23B of the monitoring device 2B is confirmed. A power-off / on-control signal 105 for controlling the power-on / off of the control unit 4A is transmitted to
In the control signal transmission unit 23B, the power-off / on control transmission signal 106 is used as the downlink data 107 through the communication control unit 21B, the modulation / demodulation device 72B, and the transmission path 9B to be monitored device 1B.
Transmit to.

Downlink data 10 is transmitted via the modulator / demodulator 71B.
The communication control unit 42B that has received 7 receives the power control signal output unit 5
The communication power supply off / on control signal 108 is transmitted to B, and the power supply control signal output unit 5B transmits the power supply control signal 32 to the power supply control unit 32 of the power supply unit 3A.
The power supply control signal 109 is transmitted to A. As a result, the power supply control unit 32A controls the power supply from the power supply unit 31A to the control unit 4A to be turned on / off. For example, the power supply here may be stopped for a few seconds (for example, 1 second) and the power may be supplied again (power off / on).

As a result, the control section 4A has a function of automatically starting up in the initial state when the power is turned on again, and a restarting function is constructed. Incidentally, with respect to the distant monitoring control device of the second system K2, the operation in the case where a failure due to software occurs in the control unit 4B in the monitored device 1B is also the same as the control unit 4 in the reverse procedure.
A restart function can be built for B.

In the distant monitoring control system shown in FIG. 1, a case has been described in which the distant monitoring control device is composed of two redundant systems of the distant monitoring control device and the central monitoring control device 81. It may be three or more systems.

[0025]

As described above, according to the present invention, even in the case where the control unit of the distant monitored device in the redundant distant monitoring control device has a fault due to software, The control unit in the fault condition is forcibly controlled by turning on / off (remote power off / on) the power supply to the control unit of the monitored device in the faulty system from the monitoring device in the normally operating system via the monitored device. Since it is possible to reliably restart after resetting, the failure can be promptly and reasonably recovered. This eliminates the need for on-site resetting of the control unit of the monitored device in which a failure has occurred, and the time required for failure recovery can be effectively shortened.

[Brief description of drawings]

FIG. 1 is a block diagram showing a basic configuration of a remote monitoring control system according to an embodiment to which a remote power control method of the present invention is applied.

[Explanation of symbols]

 1A, 1B Monitored device 2A, 2B Monitored device 3A, 3B Power supply unit 4A, 4B Control unit 5A, 5B Power supply control signal output unit 6A, 6B Measurement control unit 9A, 9B Transmission line 21A, 21B, 42A, 42B Communication control unit 22A, 22B Control state detection unit 23A, 23B Control signal transmission unit 31A, 31B Power supply unit 32A, 32B Power supply control unit 41A, 41B Measurement signal processing unit 43A, 43B State monitoring unit 71A, 71B, 72A, 72B Modem demodulator 81 Central Supervisory control device 101A, 101B Upstream data 107 Downstream data

Claims (3)

[Claims] 1. A plurality of distant monitoring control devices, wherein a monitored device including a control unit and a power supply unit for supplying power to the control unit and a monitoring device are connected to each other by different transmission lines and are duplexed in the center. When monitoring and controlling with a supervisory control device,
Based on the result of constantly monitoring the operating state of the control unit on the monitored device side, the monitoring device side detects the state of the control unit, and the central monitoring control device side detects the state of the control unit. By determining whether the power supply is turned off or on in the power supply unit according to the result, the monitored power supply unit can be changed from a normal power supply unit to an abnormal power supply unit according to the result of the power supply off / on determination on the monitored device side. A remote power control method, characterized in that the power supply to the control unit is controlled to be turned on / off. 2. A plurality of distant monitoring control devices in which a monitored device including a control part and a power supply part for supplying power to the control part and a monitoring device are connected to each other by different transmission lines and are duplexed. In a distant monitoring control system comprising a central monitoring control device that monitors and controls the plurality of distant monitoring control devices, the monitored device constantly monitors the operating state of the control unit and outputs a state monitoring signal, The monitoring device detects a state of the control unit based on the state monitoring signal and outputs a control state detection signal, and the central monitoring control device turns off the power in the power supply unit according to the control state detection signal. Each has a power supply operation determination unit that outputs a power supply OFF / ON control signal indicating the result of determining whether or not it is ON, and the monitored device is obtained through the power supply operation determination unit. A power supply control signal output unit for outputting a power supply control signal for controlling the power supply unit from normal to abnormal according to the power supply off / on control signal, wherein the power supply unit is responsive to the power supply control signal A distant monitoring control system comprising a power supply control unit for turning on / off the power supply to the control unit. 3. The remote monitoring control system according to claim 2, wherein the status monitoring signal is transmitted as rising data from the monitored device to the monitoring device via the transmission path, and the power is turned off. A remote monitoring control system, wherein the ON control signal is transmitted as down data from the monitoring device to the monitored device via the transmission path.