JPS63234798A - Remote supervisory and controlling equipment - Google Patents

Abstract

PURPOSE:To release the run away of a slave station processor in a master station side by inserting a signal for resetting a microprocessor into a control signal by a master station device, taking out the reset signal from the control signal and inputting to the microprocessor in a slave station. CONSTITUTION:The remote supervisory and controlling equipment A of the master station transmits the control signal to a transmission path 5A, the remote supervisory and controlling equipment B of the slave station receives the control signal from the transmission path 5A and is controlled by the microprocessor. In the equipment B, if the microprocessor runs away, the operator of the equipment A depresses a remoto reset switching 14 corresponding to the equipment B. A reset signal inserting part 12 outputs the reset signal to a corresponding signal line and a modulation signal is transmitted to the transmission path 5A. The reset signal detecting part 13 of the equipment B detects it and the microprocessor is reset. In such a way, the run away of the slave station processor can be released in the master station side.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a remote monitoring and control device comprising a master station device and a slave station device connected by a transmission path, and particularly relates to a remote monitoring and control device equipped with a microprocessor. It is something.

[Conventional technology]

BACKGROUND ART Conventionally, a microprocessor operated by firmware is generally used in a master station device and a slave station device that constitute a remote monitoring and control device, and the master station and slave station devices are controlled by this microprocessor. Since these microprocessors are the core of the remote monitoring and control device, a watchdog timer circuit is provided to monitor the operating status of the microprocessors and to immediately restore the system if an abnormality occurs.

[Problem that the invention seeks to solve]

However, depending on the input timing of external noise, etc., the watchdog timer circuit may not be able to recover the microprocessor from runaway. When such an abnormality occurs in the microprocessor of the slave station device, maintenance personnel must travel to the site, perform a reset operation, and initial start the firmware.

An object of the present invention is to provide a remote monitoring and control device in which even if the above-mentioned abnormality occurs in a slave station device, a microprocessor can be reset on the master station side without requiring maintenance personnel to travel to the site. There is a particular thing.

[Means for solving problems]

The present invention includes a master station device that outputs a control signal to a transmission path, and a slave station device that receives the control signal output from the master station device through the transmission path and is controlled by a microprocessor. In the remote monitoring control device, the master station device includes signal insertion means for inserting a reset signal for resetting the microprocessor into the control signal, and the slave station extracts the reset signal from the control signal and inserts the reset signal into the microprocessor. It is characterized by comprising an input signal detection means.

[Example] Next, an example of the present invention will be described with reference to the drawings.

FIG. 1 shows a block diagram of this embodiment. This device has 1:
It is configured based on the N control method, and has transmission lines 5A,
The system includes a master station remote monitoring and control device A and N slave station remote monitoring and control devices connected by 5B. However, in the figure, only the remote station monitoring and control device B is shown as the slave station for the sake of simplicity.

The control input unit 1 of the master station remote monitoring and control device A receives and receives signals for controlling the control target connected to the slave station remote monitoring and control device B from the outside. Is the transmitting section 2A the control input section 1?
A control signal of a predetermined format is generated based on these signals, and the modulator 3A modulates a predetermined carrier wave using the control signal from the transmitter 2A and outputs the modulated signal.

The reset signal insertion section 12 is connected to the branch section 4 described later by N signal lines, and when one of the N remote reset switches connected to the reset signal insertion section 12 is pressed, that switch is activated. A reset signal is output to the corresponding signal line.

The branching unit 4 branches the signal from the modulating unit 3A to N transmission lines 5A and outputs the signal. When a reset signal is input from the reset signal insertion unit 12 through one of the N signal lines, the branching unit 4 also outputs a modulated signal to the transmission i5A corresponding to the signal line for a certain period of time (for example, 500m5ec>
Force the logic level to “0”.

The demodulating section 6A receives and receives the modulated signal sent from the slave station remote monitoring and control device B through the transmission line 5B, demodulates the display signal, and outputs the demodulated signal. The receiving section 7A generates a predetermined signal to be input to a display device connected to the master station remote monitoring and control device A based on the display signal from the demodulating section 6A. The display output section 10 receives and receives the signal from the receiving section 7A, and outputs it to a display device.

The transmission/reception control section 9A includes a microprocessor, and the transmission section 2A performs necessary control to generate a control signal in a predetermined format based on the signal from the control input section 1, and the reception section 7A is equipped with a demodulation section 6A. The controller performs the necessary control to generate a predetermined signal to be input to the display device based on the display signal from the display device.

On the other hand, the demodulator 6B of the slave station remote monitoring and control device B
The modulated signal sent from the master station remote monitoring and control device A through A is demodulated and a control signal is extracted. Based on the control signal from the demodulating section 6B, the receiving section 7B generates a signal that is directly applied to the control target connected to the slave station remote monitoring and control device B to control them, and the control output section 8 receives this signal. Output to the controlled object.

The display input section 11 receives and outputs signals from the controlled object, and the transmitting section 2B generates a display signal in a predetermined format to be transmitted to the master station remote monitoring and control device A based on this signal. The modulator 3B modulates a predetermined carrier wave using the display signal from the transmitter 2B, and sends it to the master station remote monitoring and control device A through the transmission path 5B.

The transmission/reception control section 9B is equipped with a microprocessor, and the reception section 7B performs necessary control to generate a signal to control the controlled object based on the control signal from the demodulation section 6B, and the transmission section 2B performs display input. Based on the signal from the section 11, necessary control is performed to generate a display signal of a predetermined format.

The reset signal detection unit 13 constantly monitors the control signal demodulated by the demodulation unit 6B, and
ms e c) When the control signal becomes the logic level "O", the cent signal is input to the microprocessor of the transmission/reception control section 9B.

Next, the operation will be explained. When a signal for controlling a control target connected to the slave station remote monitoring and control device B is input to the control input unit 1 of the master station remote monitoring and control device A, the transmitting unit 2A transmits this signal from the control input unit 1. The receiver is removed, and the transmitting/receiving control section 9A
A control signal of a predetermined format is generated under the control of 4ffll. The modulator 3A modulates a predetermined carrier wave using this control signal and outputs the modulated carrier wave.

The branching section 4 sends the modulated signal from the modulating section 3A to the slave station remote monitoring and control device B through the transmission path 5A.

The demodulator 6B on the slave station side demodulates the modulated signal sent from the master station remote monitoring and control device A through the transmission path 5A, and extracts the control signal. The receiving section 7B generates a signal to be directly applied to the controlled object based on the control signal from the demodulating section 6B, and the control output section 8 outputs this signal to the controlled object.

On the other hand, when the display input section 11 receives a signal from the controlled object, the transmitting section 2B generates a display signal in a predetermined format to be transmitted to the master station remote monitoring and control device A based on this signal. Then, the modulator 3B modulates the carrier wave using the display signal from the transmitter 2B, and sends it to the master station remote monitoring and control device A through the transmission path 5B.

The demodulating section 6A receives and receives the modulated signal sent from the slave station remote monitoring and control device B through the transmission line 5B, demodulates the display signal, and outputs the demodulated signal. The receiving section 7A generates a predetermined signal to be input to the display device connected to the master station remote monitoring and control device A based on the display signal from the demodulating section 6A, and outputs it to the display device through the display output section 10. do.

Here, if the microprocessor in the transmission/reception control section 9B of the remote station monitoring and control device B goes out of control, the operator at the parent station presses the remote reset switch 14 corresponding to the remote monitoring and control device B.

The reset signal insertion section 12 outputs a reset signal to the signal line corresponding to the switch pressed at this time.

When a reset signal is input from the reset signal insertion unit 12 through the signal line, the branching unit 4 outputs a modulated signal to the transmission path 5A corresponding to the signal line for a certain period of time (500 minutes).
m s e c) Forcibly set the logic level to “0”.

At this time, on the slave station side, the reset signal detection section 13 constantly monitors the control signal demodulated by the demodulation section 6B, and the control signal becomes logic level "0" for a certain period of time (300 msec) or more. The reset signal detection section 13 inputs a reset signal to the transmission/reception control section 9B. As a result, the microprocessor of the transmission/reception control section 9B is reset and recovered from the runaway state.

〔Effect of the invention〕

As explained above, the present invention includes a master station device that outputs a control signal to a transmission path, and a slave station device that receives the control signal output from the master station device through the transmission path and is controlled by a microprocessor. In the configured remote monitoring and control device, the master station device includes signal insertion means for inserting a reset signal for resetting the microprocessor into the control signal, and the slave station extracts the reset signal from the control signal.
It includes signal detection means for inputting to the microprocessor.

Therefore, even if the microprocessor of the slave station device goes out of control and cannot be automatically restored, the master station device can reset, connect, and operate the microprocessor of the slave station device without having to send maintenance personnel to the site. , can be restored.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing one embodiment of the present invention. A: Master station remote monitoring and control device B:
-Slave station remote monitoring and control device 1... Control human power section 2A, 2B... Transmission section 3A, 3B... Modulation section 4... Branch section 5A, 5B... Transmission lines 6A, 6B... Demodulation sections 7A, 7B... Receiving section 8... Control output section 9A, 9B... Transmission/reception control section 10... Display output section 11... ...Display input section

Claims (1)

[Claims] (1) A remote station configured by a master station device that outputs a control signal to a transmission path, and a slave station device that receives the control signal output from the master station device through the transmission path and is controlled by a microprocessor. In the supervisory control device, the master station device includes signal insertion means for inserting a reset signal for resetting the microprocessor into the control signal, and the slave station extracts the reset signal from the control signal and inputs it to the microprocessor. 1. A remote monitoring and control device characterized by comprising a signal detection means for detecting a signal.