JPH05199565A - Remote monitor controller - Google Patents

Abstract

(57) [Summary] [Purpose] At remote monitoring and control stations, the time between controlled stations can be set without arranging a clock device that automatically calibrates the clock by the time signal sent by radio broadcasting for each controlled station. Improve accuracy when aligning. In a distant monitoring control apparatus having an HDLC transmission procedure, a master station transmits time adjustment data for time adjustment according to the HDLC transmission procedure,
The slave station is equipped with means for transmitting time calibration timing data for notifying the timing of time calibration by a global address in the address field data defined in the HDLC transmission procedure and a UI (Unnumbered Information) command in the control field. A means for inputting the time adjustment data and time calibration timing data sent from the master station according to the HDLC transmission procedure, and means for calibrating the clock were provided.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention performs transmission protocol processing using a high-level data link (hereinafter referred to as HDLC transmission procedure) and monitors between a control station (master station) and a controlled station (slave station). , Remote monitoring that transmits data necessary for control to monitor and control the controlled device and transmits data for time adjustment between the master station and the slave station from the master station to the slave station Regarding the control device.

[0002]

2. Description of the Related Art For example, in a power supply network, four to five substations or power plants are integrated into one group and
Two control stations monitor the operation of equipment such as substations and power plants. Further, each control station is connected to a central monitoring station by a communication line, and exchanges data with the central monitoring station to control power supply and distribution. If, for example, a breaker breaks at a substation or power plant, the occurrence of the accident is transmitted to the control station, and the control station performs post-accident processing, and if necessary, the central office. Be informed at the police station. If you try to analyze the cause of the accident,
It would be good if the order of accidents could be clarified. For this reason, in the past, a clock device was installed at each controlled station such as a substation to detect the time signal sent by radio broadcast by the time signal detection device and to automatically calibrate the timepiece by this detection signal, thereby causing an accident. At the same time, read the time data from this clock device,
It was added to the accident data and transmitted to the control station.

[0003]

Even if a timepiece device for automatically calibrating a timepiece is arranged at a controlled station such as a substation by a time signal sent by radio broadcasting, such a number of controlled stations is used. Installing a clock device is economically burdensome. Even if a clock device that automatically calibrates a clock according to a time signal sent by radio broadcasting is arranged at each controlled station, some controlled stations may not be able to receive the radio broadcasting. Therefore, it may not be possible to arrange a timepiece device that automatically calibrates a timepiece by a time signal sent by radio broadcasting.

The present invention has been made in view of the above circumstances, and does not require a timepiece device that automatically calibrates a timepiece according to a time signal sent by radio broadcasting to each controlled place, and the controlled device can be operated between the controlled places. It is an object of the present invention to provide a distant monitoring control device capable of improving the accuracy in time adjustment.

[0005]

In order to achieve the above object, the present invention performs a transmission protocol process in accordance with an HDLC transmission procedure, and monitors between a control station (master station) and a controlled station (slave station). In a distant monitoring control device that transmits information necessary for control to monitor and control a controlled device, a master station transmits a time adjustment data for time adjustment according to an HDLC transmission procedure, and an HDLC transmission procedure. Global address in the defined address field and UI (Unnumbered Inf in the control field)
ormation) command to transmit the time calibration timing data for notifying the timing of time calibration, and the slave station transmits the time adjustment data and the time calibration timing data sent from the master station in the HDLC transmission procedure. And a means for calibrating the timepiece.

[0006]

First, the control station (master station) takes in time data from the clock device and transmits it in advance to the controlled station (slave station). Next, the master station transmits the time calibration timing data to the slave station at regular intervals (for example, every minute) by the UI command of the global address. On the other hand, the slave station stores the time data sent from the master station in advance, and when the time calibration timing data is received from the master station next time, the timing is regarded as the minute and the stored time data is stored in the internal clock. Set to.
After that, every time the time calibration timing data is received in the 1-minute cycle, the timing is set as the minute and the internal clock is calibrated.

[0007]

FIG. 1 shows an embodiment of the present invention. Reference numeral 11 in the figure denotes a master clock device. This master clock device automatically calibrates a clock by a time signal transmitted by radio broadcasting, and outputs a current time (year, month, day, minute, second) and a pulse output every minute. The control station (master station) 12 and the controlled stations (slave stations) 1 to n (13 to 16 in the figure) have the configuration shown in FIG. The current time and every positive pulse are taken into the input / output port 26 of the control station 12. First, the control station 12 fetches the current time from the input / output port 26 and saves it in the RAM 25 at regular intervals (for example, every minute), and saves it in the RAM 25 when the next pulse for the minute is fetched from the input / output port 26. The internal clock 22 is calibrated by setting the time of the minute obtained by adding 1 minute to the preset time to the internal clock 22. In addition, the control station 12 includes the controlled stations 1 to n (13 to 1 in the figure).
In order to adjust the time of 6), each controlled station 1-n
(13 to 16 in the figure), through the transmission unit 21, HDLC
When the data requesting the transmission of the current time is input according to the transmission procedure, or at the fixed period (for example, every hour), the internal clock 2
The current time is taken out from No. 2, and the controlled stations 1 to n (13 in the figure
To 16) according to the HDLC transmission procedure via the transmission unit 21, and every time a positive pulse is taken in from the input / output port 26, the controlled stations 1 to n (13 in the figure).
To 16), the UI (Unnumbered I) in the global address and the control field in the address field defined in the procedure by HDLC transmission via the transmission unit 21.
(nformation) command also transmits time calibration timing data for notifying the timing of time calibration.

On the other hand, controlled stations 1 to n (13 to 16 in the figure)
When the time adjustment data is received from the control station 12 via the transmission unit 21 in accordance with the HDLC transmission procedure, the received time adjustment data is stored in the RAM 25, and the control station 1
When the time calibration timing data is fetched from No. 2 according to the HDLC transmission procedure via the transmission unit 21, the RAM 2
The time of the minute, which is obtained by adding 1 minute to the time adjustment data stored in 5, is set in the internal clock 22. After that, control station 1
Each time the time calibration timing data is fetched from No. 2 via the transmission unit 21 according to the HDLC transmission procedure, the internal clock 22
Calibration is performed at the time of the minute when the time of 1 is added by 1 minute.

Although the embodiment in which the control station and the controlled station have a one-to-N configuration has been described above, the present system is not limited to this range, and the control station and the controlled station have a one-to-one correspondence. Even in the HDLC transmission procedure in the case of N to M, there is no limitation on the transmission of the time calibration timing data using the UI command response. Next, the operation of the remote monitoring control device having the above-mentioned configuration will be described with reference to the flowcharts shown in FIGS. 3 shows the operation of the control station, and FIG. 4 shows the operation of the controlled station.

First, the control station 12 shown in FIG. 1 retrieves the present time from the input / output port 26 in step S31 and reads R
Save to AM25. In step S32, it is determined whether it is a fixed time (for example, every hour on the hour) or whether there is a request for time adjustment data from each controlled station. If the result is positive, the current time is retrieved from the input / output port 26 in step S33. ,
Time adjustment data is transmitted to each of the controlled stations 1 to n (13 to 16 in FIG. 1) via the transmission unit 21 according to the HDLC transmission procedure. In step S34, a wait state is entered until a positive pulse is input to the input / output port 26, and if a pulse is input, the minute time obtained by adding 1 minute to the time stored in the RAM 25 in step S35 is set in the internal clock. 22 and the controlled stations 1 to n (13 to 13 in FIG. 1) at step S36.
16) to the global address in the address field defined in the HDLC transmission procedure via the transmission unit 21 and the UI (Unnumbered Informa) in the control field.
command) command, the time calibration timing data for notifying the timing of time calibration is transmitted.

On the other hand, each of the controlled stations 1 to n (13 to 16 in the figure) shown in FIG. 1 determines whether the time adjustment data is received from the control station 12 through the transmission unit 21 in accordance with the HDLC transmission procedure in step S41. If the result is positive, the received time adjustment data is stored in the RAM 25, and if the result is false, the current time is read from the internal clock 22 and stored in the RAM 25 in step S43. In step S44, the process waits until the time calibration timing data is received from the control station 12 via the transmission unit 21 in accordance with the HDLC transmission procedure, and if the time calibration timing data is received, it is set to 1 at the time saved in the RAM 25 in step S45. The time of the positive minute obtained by adding the minutes is set in the internal clock 22.

As is apparent from the above-mentioned embodiment, when the time of each controlled station such as a substation monitored and controlled by one control station is adjusted, the master clock device is installed only in the control station and each controlled station is installed. By synchronizing the time at the control station with the time adjustment data from the control station and the time calibration timing data, it is possible to avoid the economical burden of installing a timepiece device for each controlled station.

[0013]

As described above, according to the present invention, 1
When adjusting the time of each controlled station such as a substation that is monitored and controlled by one control station, without installing a clock device that automatically calibrates the clock by the time signal sent by radio broadcasting for each controlled station Since it is possible to set the time, it is possible to eliminate the problem that the controlled stations cannot receive radio broadcasts and to eliminate the financial burden of installing clock devices as many as the controlled stations. Can be provided.

[Brief description of drawings]

FIG. 1 is a configuration diagram showing an embodiment of a remote monitoring control device according to the present invention.

FIG. 2 is a simple configuration diagram of a control station and a controlled station in FIG.

FIG. 3 is a flowchart for explaining the operation of the control station.

FIG. 4 is a flowchart for explaining the operation of the controlled station.

[Explanation of symbols]

 11 master clock device 12 control station (master station) 13 to 16 controlled station (slave station)

Claims (1)

[Claims] 1. A control station (master station) D and a controlled station (slave station) that perform transmission protocol processing according to the HDLC transmission procedure.
Means for transmitting time adjustment data for performing time adjustment in accordance with the HDLC transmission procedure in the master station in the remote monitoring control device that monitors and controls the controlled device by transmitting information necessary for monitoring and control between And the global address in the address field data defined in the HDLC transmission procedure and the UI (Unnu
mbered Information) command to transmit the time calibration timing data for notifying the timing of time calibration, and in the slave station, the time calibration data sent from the master station and the time calibration timing data are set to H level.
A remote monitoring and control device comprising means for inputting according to a DLC transmission procedure and means for calibrating a clock.