JPH0884384A - Remote supervisory controller - Google Patents

Abstract

PURPOSE: To improve control performance by adding a multiple address communication function sending a signal simultaneously to each slave station to prevent the signal points from being increased and the signal arrival time from being delayed. CONSTITUTION: When control command transmission means 11-13, 21, 15 of a master station 2 receiving a slave station address group signal to select in common each slave station 4 from a supervisory control section 1 and a control command of each slave station 4 sends each station address group signal and the control command to each slave station simultaneously, and each slave station 4 is provided with a common address setting means by which the presence of cross reference between address group signals of a concerned station and slave station is set, and control command discrimination means 24-26 receiving the slave station address group signal and the control command from the control command transmission means 11-13, 21, 15 discriminates the presence of the cross reference between the slave station address group signal and the concerned station based on the setting of the common address setting means and provides the control command to a process control section of the concerned station when the result of discrimination indicates the presence of cross reference.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a remote monitoring control device for cyclic transmission between one master station and a plurality of slave stations, such as a telemeter, and more particularly to transmitting signals to each slave station at the same time. By adding the broadcast communication function to transmit,
The present invention relates to a remote monitoring control device that can improve controllability.

[0002]

2. Description of the Related Art Generally, in the field of supervising and controlling a plurality of process control units scattered in remote areas, among n slave stations individually connected to each process control unit, a process control unit to be controlled is to be controlled. A remote monitoring control device of 1 to n in which a master station transmits a control command from a central supervisory control unit to each slave station and controls the process based on the control command received by the process control unit of the corresponding slave station. Is widely used.

FIG. 4 is a block diagram showing the configuration of this type of remote monitoring control device. In this remote monitoring control device, first, the monitoring control unit 1 sends a data request as a control command via the master station 2 and the communication line 3 to one slave station 4 to be monitored and controlled among the n slave stations 4. Send to. The slave station 4 returns the response data received from the process controller 5 to the monitor controller 1 of the master station 2 based on the data request. Next, the monitoring control unit 1 transmits a process control command to the slave station 4 via the master station 2 based on this response data. The slave station 4 gives this process control command to the process control unit 5, and the process control unit 5 controls the process based on this process control command.

FIG. 5 is a block diagram showing the configuration of a master station in this type of remote monitoring control device. As shown, the master station 2 includes an input I / F 11, a transmission circuit 12, a modulation / demodulation circuit 13, a line selector 14, a transmission circuit 15, a reception circuit 16 and an output I / F 17. In the master station 2, when the control command and the slave station selection signal are received from the monitor control unit 1, the input I / F 11 digitizes the control command and gives it to the transmission circuit 12, and also digitizes the slave station selection signal. 12 and the line selector 14. The transmission circuit 12 converts the control command and the slave station selection signal into communication codes and serialization for each communication unit, and sends them to the modulation / demodulation circuit 13. The modulation / demodulation circuit 13 modulates the communication coded control command and slave station selection signal to create a communication signal, and sends this communication signal to the line selector 14.

As shown in FIG. 6, the line selector 14 can use, for example, a parallel circuit of a plurality of relays 14a, and communicates with the communication line 3 that reaches the selected slave station 4 based on the slave station selection signal. While connecting to the modulation / demodulation circuit 13, the connection between the other communication line 3 and the modulation / demodulation circuit 14 is opened, so that the communication signal sent from the modulation / demodulation circuit 13 is passed to the transmission circuit 15 in response to the slave station selection signal. I am letting you. The transmission circuit 15 performs line impedance matching, and as shown in the figure, comprises a transmission transformer 15a, a disconnector 15b, and a line arrester (lightning arrester) 15c, and sends this communication signal to the communication line 3 reaching the slave station 4. Sending out.

In this way, the transmission of the control command and the slave station selection signal to the slave station 4 is completed. The line selector 14 holds the connection state of the communication line 3 until the next slave station selection signal is input.

Then, it is assumed that the slave station 4 returns response data. Since the connection state of the line selector 14 is held for this response data, the response data passes through the transmission circuit 15 and the line selector 14 from the communication line 3 and then the modulation / demodulation circuit 13 is transmitted.
Is input to The modulation / demodulation circuit 13 demodulates this response data and sends it to the reception circuit 16. The receiving circuit 16 converts this response data into a digital signal and gives it to the output I / F 17.
The output I / F 17 outputs this response data as a display signal to the monitoring controller 1. The monitoring control unit 1 displays the monitoring data based on this display signal, gives a control command for controlling the process and the same slave station selection signal as the previous time to the master station 2 when necessary, and when not necessary, A control command indicating a data request and a slave station selection signal for selecting another slave station from the previous time are given to the master station 2. In the same manner, the remote monitoring control device performs one-to-one communication between the master station 2 and the slave station 4 in the slave station 4 in the same manner.
Cyclical execution by switching.

[0008]

However, in the above remote monitoring and control apparatus, since the one-to-one communication is executed between the master station 2 and the slave station 4, the same control command is issued to a plurality of slave stations 4. In the case of transmitting the same to the master station 2, it is necessary to sequentially give the same control command to the master station 2 while switching the slave station selection signal, which causes a problem that the number of signal points increases.

Further, since the line selector 14 connects the respective slave stations 4 one by one and outputs the signal to the communication line 3, when it is desired to output a signal having the same content, the communication line 3 between the slave stations 4 is connected. However, there is a problem in that a delay of several seconds to several tens of seconds occurs for each station due to the switching. Especially, this problem is
The process control unit 5 connected to has a speaker device, and it appears remarkably when it is desired to simultaneously broadcast an alarm or a message through these speaker devices. That is, when simultaneous broadcasting is performed, there is a time lag in signal reception between the slave stations 4, so that there is a problem that a time lag occurs between the speaker devices and an echo occurs.

From the viewpoint of solving the above problems, the communication speed of the communication line is made high, a plurality of communication control devices are installed, and a master station is installed exclusively for each slave station. A method of making a dedicated connection without selection switching of is conceivable. However, with this method, it is difficult to construct an economical system due to an increase in communication costs and the number of master stations.

The present invention has been made in consideration of the above situation, and by adding a broadcast communication function for simultaneously transmitting signals to each slave station, an increase in the number of signal points and a delay in signal arrival time are eliminated, Therefore, it is an object of the present invention to provide a remote monitoring control device capable of improving controllability.

Another object of the present invention is to provide a remote control capable of preventing the generation of echoes and improving the communicability of an alarm by providing each slave station with a broadcast communication function for simultaneously transmitting an alarm issuance start signal. To provide a device.

[0013]

According to a first aspect of the invention, a master station connected to a supervisory controller and a plurality of slave stations individually connected to a plurality of process controllers are connected via a communication line. In the remote monitoring control device that is connected, the monitoring control unit is selectively connected to each slave station via the master station, thereby monitoring and controlling the process control unit of each slave station. When a slave station address group signal for commonly selecting each slave station and a control command for each slave station are input from the monitoring controller, the slave station address group signal and control command are simultaneously transmitted to each slave station. Each slave station has a common address setting means for setting whether or not there is a correspondence between the slave station and the slave station address group signal, and the slave station from the control command transmitting means. Station address glue When a signal and a control command are received, it is determined whether or not the slave station address group signal and the own station are in correspondence with each other based on the setting of the common address setting means. It is a remote monitoring control device provided with a control command determination means to be given to a process control unit of its own station.

According to a second aspect of the present invention, a master station connected to the control unit and a plurality of slave stations individually connected to the plurality of alarm issuing units are connected via a communication line, and the control unit is In the remote control device for selectively issuing an alarm in the alarm issuing unit of each slave station by being selectively connected to each slave station via the master station, the master station shares the slave stations in common. When a slave station address group signal for selecting and an alarm issuing start signal for issuing an alarm from each of the alarm issuing units are input, the slave station address group signal and the alarm issuing start signal are simultaneously sent to each of the slave stations. Each slave station has a common address setting means for setting whether or not there is a correspondence between itself and the slave station address group signal, and the slave signal from the slave signal sending means. Address group No. and an alarm issuance start signal are received, it is determined whether or not the slave station address group signal and the own station are in correspondence with each other based on the setting of the common address setting means. It is a remote control device provided with a warning signal judging means for giving a warning start signal to an alarm warning section of its own station.

[0015]

Therefore, in the invention according to claim 1, by taking the above-mentioned means, the control command transmitting means in the master station is a slave station for selecting each slave station from the monitor control section in common. When an address group signal and a control command for each slave station are input, the slave station address group signal and control command are sent to each slave station at the same time. Common address setting means for setting the presence or absence of correspondence is provided, and when the control command determination means receives the slave station address group signal and the control command from the control command sending means, the slave station is set based on the setting of the common address setting means. The presence or absence of correspondence between the address group signal and the local station is judged, and when the judgment result shows the correspondence, a control command is given to the process control section of the local station, so a broadcast communication device that simultaneously transmits signals to each slave station. By adding, to eliminate the increase and signal arrival time delay of the signal points, with, it is possible to improve the controllability.

Further, in the invention according to claim 2, in the master station, the warning signal sending means causes the slave station address group signal for commonly selecting each slave station and the warning to be issued by each warning issuing unit. When a warning issuance start signal is input to the slave stations, the slave station address group signal and the warning issuance start signal are sent to each slave station at the same time, and each slave station responds to its own station and slave station address group signal. Common address setting means for setting presence / absence of the slave station is provided, and when the announcement signal determination means receives the slave station address group signal and the alarm announcement start signal from the announcement signal transmitting means, the slave station is set based on the setting of the common address setting means. The presence / absence of correspondence between the address group signal and the local station is judged, and when the judgment result shows the correspondence, an alarm issuing start signal is given to the alarm issuing section of the own station. By providing a broadcast function of transmitting items, it is possible to improve the transmission of the alarm to prevent the occurrence of echo.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a master station applied to a remote monitoring control device according to a first embodiment of the present invention, and FIG. 2 shows a configuration of a slave station applied to this remote monitoring control device. 7 is a block diagram, the same parts as those of FIGS. 4 to 6 are denoted by the same reference numerals, and detailed description thereof will be omitted.
Here, only different parts will be described.

That is, in addition to the conventional cyclic communication function, the apparatus of this embodiment can select each slave station 4 at the same time when transmitting signals of the same content to each slave station 4, and thus the number of signal points And the delay of the signal arrival time are eliminated. Specifically, compared to the master station 2 shown in FIG.
Instead of the line selector 14, the conventional line selector 1
In addition to the function of 4, when a slave station address group signal for commonly selecting all slave stations 4 is received from the input I / F 11, a function of connecting all communication lines and the modulation / demodulation circuit 13 according to the slave station address group signal is provided. Line selector 2
1 is provided.

On the other hand, each slave station 4 is, as shown in FIG. 2, a transmission circuit 22 connected to the communication line 3, and this transmission circuit 22.
A demodulation circuit 23 that demodulates a communication signal that has passed through and outputs a serial signal, and a reception circuit 2 that digitizes the serial signal received from the demodulation circuit 23 and sends a digital signal.
4, an address determination circuit 25 for determining whether or not the address included in the digital signal received from the receiving circuit 24 indicates the own station, and a digital signal received from the receiving circuit 24 when the determination result of this address determination circuit indicates the own station Output I / F 26 for passing the signal to the process control unit 5, an input I / F 27 for inputting a digital signal by digitizing the response data received from the process control unit 5, and a digital signal input from the input I / F 27 for communication coding. Transmission circuit 28
And a modulation circuit 2 that modulates the communication coded signal by the transmission circuit 28 and sends the communication signal to the transmission circuit 22.
9 is equipped.

Here, the address determination circuit 25 is set with a local address "one of n" indicating the local station and a common address indicating the common address "0" of all slave stations, and the receiving circuit 24 When a digital signal is received from the slave station, the slave station selection signal “any one of 1 to n” or the slave station address group signal “0” included in the digital signal is compared with the set own station address and common address. However, it has a function of controlling the output I / F 26 so that the digital signal from the receiving circuit 24 is passed when the comparison result shows coincidence.

Next, the operation of the remote monitoring control device constructed as described above will be described. Now, it is assumed that the central supervisory control unit 1 gives a slave station address group signal "0" for commonly selecting all the slave stations 4 to the master station 2 together with a control command.

At the master station, as described above, the input I / F 11
Sends the slave station address group signal "0" to the line selector 21, and sends the slave station address group signal "0" and a control command to the transmission circuit 12. The transmitter circuit 12 communication codes the slave station address group signal “0” and the control command and gives the communication signal to the modulation / demodulation circuit 13. The modulation / demodulation circuit 13 communicates the communication coded slave station address group signal “0” and the control command. A signal is created and this communication signal is sent to the line selector 21.

On the other hand, the line selector 21 receives all the communication lines 3 according to the slave station address group signal "0".
And the modem circuit 13 are connected. As a result, the communication signals transmitted from the modulation / demodulation circuit 13 are simultaneously transmitted to all the communication lines and arrive at the slave stations 4 at the same time.

In each slave station 4, the reception circuit 24 receives this communication signal through the transmission circuit 22 and the demodulation circuit 23, and creates a slave station address group signal "0" and a digital signal indicating a control command from the received contents. To the address determination circuit 25 and the output I / F 26.

The address judging circuit 25 compares the slave station address group signal "0" of this digital signal with a predetermined own station address and common address "0", and the comparison result is the slave station address group signal "0". The output I / F 26 is controlled so as to pass the digital signal from the receiving circuit 24 in order to show the coincidence between "0" and the common address "0".
The output I / F 26 is controlled by the address determination circuit 25, converts a digital signal into a control command, passes the control signal, and supplies the control command to the process control unit 5. The process control unit 5 executes process control based on the control command. In addition, each slave station 4
At the same time, the communication signals are received, so that the process control units 4 simultaneously execute the process control.

As described above, in the master station 2, the line selector 21 can simultaneously transmit a common communication signal to each slave station 4, and in each slave station 4, the address determination circuit 25 processes the reception contents common to each slave station. It can be given to the control unit 5.

Further, in the address judging circuit 25, since the own station address is set in addition to the common address, the conventional cyclic communication function can be realized as described above.

As described above, according to the first embodiment, in the master station 2, the slave station address group signal for commonly selecting each slave station 4 from the monitor control unit 1 and the control command of each slave station 4 are provided. Is input, the slave station address group signal and the control command are simultaneously sent to each slave station 4, and each slave station 4
Then, the address determination circuit 25, which sets whether or not the own station and the slave station address group signal correspond, is provided.
4 receives the slave station address group signal and the control command, the address determination circuit 25 determines whether or not the slave station address group signal corresponds to the own station based on the setting, and when the determination result indicates the correspondence, Since the output I / F 26 is controlled so as to give a control command to the process control unit 5 of its own station, by adding a broadcast communication function of simultaneously transmitting signals to each slave station 4, the number of signal points is increased and the signal arrives. It is possible to eliminate the time delay and improve the controllability.

Further, in the address judging circuit 25, since the own station address is set in addition to the common address, the conventional cyclic communication function can be realized as described above.

Next, a remote control device according to the second embodiment of the present invention will be described. FIG. 3 is a block diagram showing a configuration in which this remote control device is applied to alarm issuance control. The same parts as those in FIG. 4 are denoted by the same reference numerals and detailed description thereof will be omitted, and only different parts will be described here.

That is, the apparatus according to the present embodiment improves the alarm transmissibility by simultaneously issuing alarms or messages to the speaker devices scattered at remote locations by the broadcast communication function to prevent the generation of echoes. Specifically, compared to the device shown in FIG. 4, in each slave station 4, instead of the process control unit 5, an alarm issuing control unit 31, a sound source generation unit 32, an amplifier 33 with a microphone, and An alarm issuing unit 35 including a speaker device 34 is connected. Further, a remote control unit 36 in which the monitoring function of the monitoring control unit 1 is omitted is provided in place of the monitoring control unit 1, the reception function is omitted in the master station 2, and the transmission function is omitted in the slave station 4. .

When the alarm issuing control unit 31 receives an issuing start command from the slave station 4, the alarm issuing control unit 31 sends a power-on command to the amplifier 33.
To the sound source generator 32.

The sound source generator 32 outputs a predetermined alarm sound when receiving a reproduction command from the alarm issuance controller 31. The amplifier 33 with a microphone has a function of converting an alarm sound output from the sound source generating unit 32 into an electric signal, amplifying the electric signal, and giving the amplified electric signal to the speaker device 34. The speaker device 34 outputs an alarm sound by the amplified electric signal received from the amplifier 33.

Therefore, as described above, when the master station 2 sends the alarm issuing start command and the slave station group address signal "0" to each slave station 4, in each slave station 4, the reception circuit 24 causes the slave circuit 24 to operate. When the address group signal and the alarm issuance start signal are received, the address determination circuit 25 determines whether or not the slave station address group signal corresponds to the own station based on the setting. Output command I / F
It is sent to the alarm issuance control unit 31 of the own station via 26.

In the alarm issuing control unit 31, a predetermined alarm sound is output from the speaker device 34 via the sound source generating unit 32 and the amplifier 33 based on this issuing start command. Since each slave station 4 receives the announcement start command at the same time, the alarm announcement control section 31 simultaneously outputs the alert sound. Therefore, the occurrence of echo can be prevented, and the alarm transmissibility can be improved.

As described above, according to the second embodiment, in the master station 2, the slave station address group signal for commonly selecting each slave station 4 and each alarm issuing section 35 issues an alarm or a message. When the issuing start command for causing the slave station is input, the slave station address group signal and the issuing start command are simultaneously transmitted to each slave station 4, and each slave station 4 performs the same operation as in the first embodiment. An address determination circuit 25 is provided for setting whether or not there is a correspondence between a station and a slave station address group signal, and when the reception circuit 24 receives a slave station address group signal and an alarm issuance start signal, the address determination circuit 25 is based on the settings. When the slave station address group signal and the own station are associated with each other, and when the result of the determination indicates that there is a correspondence, an issue start command is given to the alarm issue control unit 31 of the own station. By providing a broadcast communication function of transmitting the start command, it is possible to improve the transmission of the alarm to prevent the occurrence of echo. In addition, the present invention can be modified in various ways without departing from the scope of the invention.

[0037]

As described above, according to the first aspect of the present invention, in the master station, the control command transmitting means and the slave station address group signal for commonly selecting each slave station from the supervisory control unit and each slave station address group signal. When a slave station control command is input, the slave station address group signal and control command are simultaneously sent to each slave station, and each slave station determines whether or not there is a correspondence between itself and the slave station address group signal. A common address setting means to be set is provided, and when the control command determining means receives the slave station address group signal and the control command from the control command transmitting means, the slave station address group signal and the self command are set based on the setting of the common address setting means. When the presence / absence of a correspondence with a station is judged and the judgment result shows that there is a correspondence, a control command is given to the process control section of its own station, so that a broadcast communication function for simultaneously transmitting signals to each slave station is added. Yo To solve the delay and increased signal arrival time of the signal points, with it, it can provide a remote monitoring control device capable of improving the controllability.

According to the second aspect of the present invention, in the master station, the warning signal sending means causes the warning signal from the slave station address group signal for commonly selecting each slave station and the warning issuing section. When the alarm issuance start signal is input, the slave station address group signal and the alarm issuance start signal are simultaneously sent to each slave station, and each slave station responds to the correspondence between its own station and the slave station address group signal. A common address setting means for setting presence / absence is provided, and when the announcement signal determination means receives the slave station address group signal and the alarm announcement start signal from the announcement signal sending means, the slave station address is set based on the setting of the common address setting means. When it is determined whether the group signal corresponds to the own station, and when the judgment result shows that there is a correspondence, an alarm issue start signal is given to the alarm issue section of the own station. By providing a broadcast function of transmitting, possible to provide a remote control device capable of improving the transmission of the alarm to prevent the occurrence of echo.

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration of a master station applied to a remote monitoring control device according to a first embodiment of the present invention,

FIG. 2 is a block diagram showing a configuration of a slave station in the embodiment.

FIG. 3 is a block diagram showing a configuration in which a remote control device according to a second embodiment of the present invention is applied to alarm issuing control,

FIG. 4 is a block diagram showing a configuration of a conventional remote monitoring control device,

FIG. 5 is a block diagram showing a configuration of a master station in a conventional remote monitoring control device,

FIG. 6 is a circuit diagram showing a configuration of a conventional line selector and a transmission circuit.

[Explanation of symbols]

1 ... Supervisory control unit, 2 ... Parent station, 3 ... Communication line, 4 ... Slave station,
5 ... Process control unit, 6 ..., 7 ..., 8 ..., 9 ..., 10
..., 11 ... Input I / F, 12 ... Transmission circuit, 13 ... Modulation / demodulation circuit, 14 ..., 15 ... Transmission circuit, 16 ..., 17 ..., 18
..., 19 ..., 20 ..., 21 ... Line selector, 22 ... Transmission circuit, 23 ... Demodulation circuit, 24 ... Reception circuit, 25 ... Address determination circuit, 26 ... Output I / F, 31 ... Warning issuance control section, 32 ... Sound source generation unit, 33 ... Amplifier, 34 ... Speaker device, 35 ... Alarm issuing unit, 36 ... Remote control unit.

Claims (2)

[Claims] 1. A master station connected to a monitor control unit and a plurality of slave stations individually connected to a plurality of process control units are connected via a communication line, and the monitor control unit is connected via the master station. In the remote monitoring control device that monitors and controls the process control unit of each slave station by being selectively connected to each slave station, the master station commonly selects each slave station from the monitoring control unit. When a slave station address group signal for controlling and a control command of each slave station are input, the slave station address group signal and a control command are simultaneously provided to the slave stations, and control command sending means is provided, wherein Each slave station, when receiving the slave station address group signal and the control command from the control command sending means, a common address setting means for setting the correspondence between the own station and the slave station address group signal, Both Based on the setting of the address setting means, the presence or absence of the correspondence between the slave station address group signal and the own station is judged, and when the judgment result shows the correspondence, the control command judgment for giving the control command to the process control section of the own station And a remote monitoring control device. 2. A master station connected to the control unit and a plurality of slave stations individually connected to the plurality of alarm issuing units are connected via a communication line, and the control unit connects each of the plurality of slave stations via the master station. In a remote control device for issuing an alarm from an alarm issuing unit of each of the slave stations by being selectively connected to the slave stations, the master station is a slave station address group for commonly selecting the slave stations. When a signal and an alarm issuance start signal for issuing an alarm in each of the alarm issuance units are input, the slave station address group signal and the alarm issuance start signal are simultaneously sent to each of the slave stations Each slave station has a common address setting means for setting whether or not the own station and the slave station address group signal are associated with each other, and the slave station address group signal and the alarm start of warning from the warning signal sending means. Belief When a response is received, the presence / absence of the correspondence between the slave station address group signal and the own station is determined based on the setting of the common address setting means, and when the determination result shows the correspondence, the alarm issuing start signal is transmitted to the own station. And a warning signal determination means to be given to the alarm warning section of the remote controller.