JPH074032B2 - Remote monitoring controller - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a distant monitoring control device including a master station device and a slave station device connected by a transmission path, and more particularly to a distant monitoring control device including a microprocessor. It is a thing.

[Conventional technology]

2. Description of the Related Art Conventionally, a master station device and a slave station device, which generally form a remote monitoring control device, use a microprocessor operated by formware to control the master station / slave station device. Since these microprocessors are the center of the distant monitoring control device, a watchdog timer circuit is provided for monitoring the operating state of the microprocessors and immediately recovering when an abnormality occurs.

[Problems to be solved by the invention]

However, depending on the input timing of noise from the outside, 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, the maintenance personnel must make a business trip to the site to perform a reset operation to initially start the firmware.

An object of the present invention is to provide a distant monitoring control device capable of resetting a microprocessor on the master station device side without sending a maintenance worker to the field even if the above-mentioned abnormality occurs on the slave station device. Especially.

[Means for solving problems]

In order to achieve the above-mentioned object, the present invention is configured by a master station distant monitoring control device and a slave station distant monitoring control device, and the master station distant monitoring control device is a control target connected to the slave station distant monitoring control device. A control input unit that receives a signal for controlling the signal from the outside, a transmission unit that generates a control signal of a predetermined format based on the signal from the control input unit, and a predetermined carrier wave that is modulated by the control signal from the transmission unit. And the N distant reset switch and the N distant reset switch are connected with each other, and when one of the N distant reset switches is pressed, the reset signal is output to the signal line corresponding to the switch. The signal from the reset signal insertion unit and the modulation unit is branched into N transmission lines and output, and when the reset signal is input from the reset signal insertion unit through one of the N signal lines, the signal corresponds to that signal line. Go out on the transmission line And a demodulation section for forcibly setting the modulated signal to be a logical level 0 for a certain period of time, a demodulation section for receiving the modulated signal sent from the remote station distant monitoring control device through a transmission path and demodulating and outputting a display signal, A receiving unit that generates a predetermined signal to be input to a display device connected to the master station remote monitoring control device based on the display signal from the display unit, and a display output unit that receives the signal from the receiving unit and outputs the signal to the display device. And a microprocessor, in which a transmitter performs control necessary to generate a control signal of a predetermined format based on a signal from a control input unit, and a receiver receives a display device based on a display signal from the demodulator. It is composed of a transmission / reception control unit that performs the control necessary to generate a predetermined signal to be input to the slave station remote monitoring control device, and demodulates the modulated signal sent from the parent station remote monitoring control device through the transmission line. Control signal A demodulation section for taking out the signal, a receiving section for directly applying a control signal from the demodulation section to a control target connected to the remote station remote monitoring control device, and generating a signal for controlling these, and this signal as a control target. A control output unit for outputting, a display input unit for receiving and outputting a signal from the controlled object, and a transmitting unit for generating a display signal of a predetermined format to be transmitted to the master station distant monitoring control device based on this signal, The receiving unit controls the controlled object based on the control signal from the demodulation unit, which includes a modulation unit that modulates a predetermined carrier wave according to the display signal from the transmission unit and sends it to the master station remote monitoring control device through the transmission line, and a microprocessor. It is demodulated by the transmission / reception control unit that performs the control necessary to generate the signal and the transmission unit that performs the control necessary to generate the display signal of the predetermined format based on the signal from the display input unit, and the demodulation unit. Control signal It is composed of a reset signal detecting section which constantly monitors and inputs the reset signal to the microprocessor of the transmission / reception control section when the control signal becomes the logic level 0 for a certain time or longer.

〔Example〕

Next, an embodiment of the present invention will be described with reference to the drawings.

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

The control input unit 1 of the master station remote monitoring control device A receives a signal for controlling the control target connected to the slave station remote monitoring control device B from the outside. The transmitter 2A generates a control signal of a predetermined format based on the signal from the control input unit 1, and the modulator 3A
Modulates a predetermined carrier wave according to a control signal from the transmitter 2A and outputs the modulated carrier wave.

The reset signal inserting section 12 is connected to the branching section 4 described later by N signal lines, and when one of the N distant reset switches connected to the reset signal inserting section 12 is pressed, the switch is inserted into the switch. A reset signal is output to the corresponding signal line.

The branching unit 4 branches the signal from the modulating unit 3A into N transmission lines 5A and outputs the branched signal. The branching unit 4 is also a reset signal inserting unit.
When the reset signal is input from one of the 12 signal lines N, the modulation signal output to the transmission line 5A corresponding to the signal line is forcibly set to the logical level "0" for a certain time (for example, 500 msec). To do.

The demodulation section 6A receives the modulated signal sent from the remote station distant monitoring control apparatus B through the transmission path 5B, demodulates the display signal and outputs it. Based on the display signal from the demodulation unit 6A, the receiving unit 7A generates a predetermined signal for input to a display device connected to the master station remote monitoring control device A. The display output unit 10 receives the signal from the receiving unit 7A and outputs it to the display device.

The transmission / reception control unit 9A includes a microprocessor, and the transmission unit 2A
Performs the control necessary to generate a control signal of a predetermined format based on the signal from the control input unit 1, and the receiving unit 7A inputs it to the display device based on the display signal from the demodulating unit 6A. Performs control necessary to generate a predetermined signal.

On the other hand, the demodulation unit 6B of the remote station remote monitoring control device B demodulates the modulated signal sent from the master station remote monitoring control device A through the transmission path 5A and extracts the control signal. Receiver 7B is demodulator 6B
The control output unit 8 outputs the signal to the controlled object by directly giving it to the controlled object connected to the remote station remote monitoring control device B based on the control signal from the.

The display input unit 11 receives and outputs a signal from the control target, and the transmission unit 2B generates a display signal of a predetermined format to be transmitted to the master station remote monitoring control device A based on this signal. The modulation unit 3B modulates a predetermined carrier wave according to the display signal from the transmission unit 2B and sends it to the master station remote monitoring control device A through the transmission line 5B.

The transmission / reception control unit 9B includes a microprocessor, and the reception unit 7B
Performs the control necessary to generate a signal for controlling the controlled object based on the control signal from 6B, and the transmission unit 2B displays a predetermined format based on the signal from the display input unit 11. Performs the control required to generate the signal.

The reset signal detector 13 constantly monitors the control signal demodulated by the demodulator 6B and keeps it for a certain period of time (for example, 300 mse).
c) When the control signal becomes the logic level "0", the reset signal is input to the microprocessor of the transmission / reception control unit 9B.

Next, the operation will be described. When a signal for controlling a control target connected to the slave station remote monitoring control device B is input to the control input unit 1 of the master station remote monitoring control device A, the transmission unit 2A outputs this signal from the control input unit 1. It receives and generates a control signal of a predetermined format under the control of the transmission / reception control unit 9A. Modulator 3A
Modulates a predetermined carrier wave with this control signal and outputs it.

The branching unit 4 sends the modulated signal from the modulating unit 3A to the remote station remote monitoring control device B through the transmission line 5A.

The demodulation unit 6B on the slave station side demodulates the modulated signal sent from the remote station remote supervisory controller A through the transmission path 5A and extracts the control signal. Based on the control signal from the demodulation unit 6B, the reception unit 7B generates a signal to be directly given to the control target, and the control output unit 8 outputs this signal to the control target.

On the other hand, when the display input unit 11 receives a signal from the controlled object,
Based on this signal, the transmitter 2B sends the master station remote monitoring controller A
Generate a display signal of a predetermined format to be transmitted to. And
The modulator 3B modulates the carrier wave by the display signal from the transmitter 2B, and sends the carrier wave to the master station remote monitoring controller A through the transmission path 5B.

The demodulation section 6A receives the modulated signal sent from the remote station distant monitoring control apparatus B through the transmission path 5B, demodulates the display signal and outputs it. Based on the display signal from the demodulation unit 6A, the reception unit 7A generates a predetermined signal to be input to the display device connected to the master station remote monitoring control device A, and outputs it to the display device through the display output unit 10. To do.

If the microprocessor runs out of control in the transmission / reception control unit 9B of the remote station remote monitoring control device B, the operator on the master station side pushes the remote reset switch 14 corresponding to the remote station remote monitoring control device B. The reset signal insertion unit 12 outputs a reset signal to the signal line corresponding to the switch pressed at this time. When the reset signal is input from the reset signal insertion unit 12 through the signal line, the branching unit 4 forcibly outputs the modulation signal output to the transmission line 5A corresponding to the signal line for a fixed time (500 msec) to the logical level “0”. "I will.

At this time, on the slave station side, the reset signal detection unit 13 has the demodulation unit 6B.
The control signal demodulated by is constantly monitored, and since the control signal becomes the logical level "0" for a fixed time (300 msec) or longer, the reset signal detection unit 13 inputs the reset signal to the transmission / reception control unit 9B. This resets the microprocessor of the transmission / reception control unit 9B and recovers from the runaway state.

〔The invention's effect〕

As described above, the present invention provides a master station device that outputs a control signal to a transmission line, and a slave station device that receives a control signal output by this master station device through the transmission line and is controlled by a microprocessor. In the remote monitoring and control device configured, the master station device is provided with a signal inserting 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 is provided with a signal detecting means for inputting to the microprocessor.

Therefore, even if the microprocessor of the slave station device causes a runaway that cannot be automatically restored, the master station device side resets the microprocessor of the slave station device and restores it without sending the maintenance personnel to the site. be able to.

[Brief description of drawings]

 FIG. 1 is a block diagram showing an embodiment of the present invention. A ... Parent station distant monitoring control device B ... Slave station distant monitoring control device 1 ... Control input unit 2A, 2B ... Transmission unit 3A, 3B ... Modulation unit 4 ... Branching unit 5A, 5B ... Transmission line 6A, 6B …… Demodulation unit 7A, 7B …… Reception unit 8 …… Control output unit 9A, 9B …… Transmission / reception control unit 10 …… Display output unit 11 …… Display input unit 12 …… Reset signal insertion unit 13 …… Reset signal detection unit 14: Remote reset switch

Claims (1)

[Claims] 1. A remote station remote monitoring control apparatus and a remote station remote monitoring control apparatus, wherein the remote station remote monitoring control apparatus sends a signal for controlling a control target connected to the remote station remote monitoring control apparatus. A control input unit that receives from the outside, a transmission unit that generates a control signal of a predetermined format based on a signal from the control input unit, and a modulation unit that modulates and outputs a predetermined carrier wave by the control signal from the transmission unit. , N remote reset switches and N
Connected by two signal lines and pressing one of the N distant reset switches outputs a reset signal to the signal line corresponding to that switch, and transmits N signals from the modulator. When the reset signal is branched and output to one of the N signal lines from the reset signal insertion portion, the modulation signal output to the transmission line corresponding to the signal line is forcibly set to the logic level 0 for a certain period of time. The branch unit, the demodulation unit that receives the modulated signal sent from the slave station remote monitoring control device through the transmission path, demodulates the display signal and outputs the demodulated signal, and the master station remote monitoring based on the display signal from the demodulation unit A receiving unit that generates a predetermined signal to be input to a display device connected to the control device, a display output unit that receives a signal from the receiving unit and outputs the signal to the display device, and a transmitting unit that includes a microprocessor and controls In order to generate the predetermined signal to be input to the display device based on the display signal from the demodulation section, the receiver performs the necessary control to generate the control signal in the predetermined format based on the signal from the output section. And a transmission / reception control unit for performing necessary control for the slave station remote monitoring control device, and a demodulation unit for demodulating a modulated signal sent from the master station remote monitoring control device through the transmission path to extract a control signal, and a demodulation unit. A receiving unit that generates a signal for directly controlling the control target connected to the slave station remote monitoring control device based on the control signal from
A control output unit that outputs this signal to the control target, a display input unit that receives and outputs the signal from the control target, and a display signal of a predetermined format that is transmitted to the master station remote monitoring control device based on this signal. A transmitting unit which is generated, a modulating unit which modulates a predetermined carrier wave by a display signal from the transmitting unit and sends the carrier wave to the master station remote monitoring control device through a transmission line, and a receiving unit which is equipped with a microprocessor and which receives a control signal from the demodulating unit. And a transmission / reception control unit that performs the control necessary to generate a signal for controlling the controlled object, and the transmission unit performs the control necessary to generate a display signal of a predetermined format based on the signal from the display input unit. , A reset signal detection unit for constantly monitoring the control signal demodulated by the demodulation unit and inputting a reset signal to the microprocessor of the transmission / reception control unit when the control signal becomes a logic level 0 for a certain time or longer. Remote monitor control device, characterized in that.