JPH0993657A - Forced control unit for remote monitor control system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a forced control unit for the remote monitor control system in which forced control to activate only a specific load in advance is executed and the control state of the load is restored to a state before the entry of forced control when the forced control is released by having only to add the control unit to the conventional remote monitor control system. SOLUTION: A terminal section 11 allows a signal line changeover section 14 to connect a signal terminal of a master set section 12 to a signal transmission reception section 13b based on control data and interrupts a line between signal transmission reception sections 13a and 13b. The master set section 12 starts the operation of a transmission unit considering from terminal equipments 1, 3 connected to a transmission line 4, a set content of forced control is transferred from the terminal equipment section 11 through a data bus DB3 , an object load 2 is forcibly operated based on the content and a corresponding output terminal equipment 3 is sequentially accessed with a transmission signal Vs having control data to stop the operation of the non-object load 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a forced control unit used in a remote supervisory control system by time division multiplex transmission.

[0002]

2. Description of the Related Art FIG. 7 shows a remote supervisory control system using time division multiplex transmission. This remote supervisory control system includes an input terminal 1 for monitoring the operating state of an operating switch S provided therein. The basic configuration is such that an output terminal 3 for controlling the controlled load 2 is connected to a transmission unit 5 via a two-wire signal line 4, and each terminal 1, 3 is unique. Is set, and the transmission unit 5 recognizes the input terminal 1 and the output terminal 3 individually by using this address.

The transmission unit 5 is shown in FIG.
A transmission signal V _S having a format as shown in (a) and (b) is transmitted. That is, the transmission signal Vs includes a start pulse ST indicating the start of signal transmission, a mode data signal MD indicating the signal mode, an address data signal AD for transmitting an address for calling each of the terminals 1 and 3, and a controlled load 5.
A control data signal CD for transmitting control data for controlling
Checksum data signal C for detecting transmission error
S, a signal reply period WT which is a time slot for receiving a reply data signal from the input terminal 1 and the output terminal 3.
Is a multi-pole (± 24 V) time division multiplex signal, and data is transmitted by pulse width modulation.

In each of the input terminal device 1 and the output terminal device 3, when the address data transmitted by the transmission signal V _S received via the signal line 4 coincides with the preset address, the transmission signal V _S The control data is fetched from the device and the reply data is synchronized with the signal reply period WT of the transmission signal Vs and is used as the current mode signal (a signal sent by short-circuiting the signal lines 4 via an appropriate low impedance). Send it back.

Further, the transmission unit 5 is provided with dummy signal sending means and interrupt signal processing means. The dummy signal transmitting means always transmits a dummy transmission signal in which the mode data signal MD is set to the dummy mode. Further, the interrupt signal processing means is for input which has generated the interrupt signal Vi when receiving the interrupt signal Vi shown in FIG. 8 (c) which is generated in response to the operation of the operation switch S in any of the input terminals 1. The terminal device 1 is searched, and the address data set in the input terminal device 1 is returned as reply data (operation data). That is, the dummy signal transmitting means always sends the dummy transmission signal to the signal line 4, and the interrupt signal Vi generated from the input terminal 1 in accordance with the operation of the operation switch S is synchronized with the start pulse signal ST of the dummy transmission signal. Then, the transmission unit 5 sends the transmission signal Vs in which the mode data signal MD is in the address confirmation mode to the signal line 4 by the interrupt processing means. Each input terminal 1 sets an interrupt flag for requesting an interrupt when the interrupt signal Vi is generated. In the input terminal 1 in which the interrupt flag is set, the mode data signal MD is the transmission signal Vs in the address confirmation mode. When it receives, the address set in the input terminal 1 is returned as reply data [monitoring data (operation data of the operation switch S)] in synchronization with the signal reply period WT of the transmission signal Vs. In this way, the transmission unit 5 can acquire the address of the input terminal device 1 that generated the interrupt signal Vi.

In the transmission unit 5, when the address of the input terminal device 1 which has generated the interrupt signal Vi is acquired, the output terminal device 3 connected to the load 2 in which the correspondence with the operation switch S is preset is connected. A transmission signal V that generates control data to be transmitted and includes the control data
s is sent to the signal line 4, control data is transmitted to the corresponding output terminal device 3, and the output terminal device 3 generates a load control output based on the control data to control the controlled load 2. . Further, the monitoring data indicating the load state is returned to the transmission unit 5 during the reply waiting period WT.

The transmission unit 5 creates control data for operation display based on the returned monitoring data and sends it to the corresponding input terminal 1 by the transmission signal Vs. In the input terminal 1, the operating state of the corresponding load 2 is displayed by turning on or off a display lamp (not shown) attached to the corresponding operation switch S based on the control data of the transmission signal Vs. .

The input terminal 4 has, for example, four inputs, and the output terminal 3 can generate four load control outputs corresponding to the four inputs. In the input terminal device 1 and the output terminal device 3, the transmission signal Vs transmitted on the signal line 4 is full-wave rectified and stabilized to obtain a power supply for operating the internal circuit. . An AC power source is separately provided for the controlled load 2 connected to the output terminal 3.

In the above-mentioned remote monitoring and control system, even if there are a plurality of operation switches S and a plurality of input terminals 1 for monitoring them, wiring can be performed with the two signal lines 4. The feature is that even if the number of blinking circuits of the load 2 is large, such as a tenant building or an office building, the work can be saved. Further, there is a feature that it is possible to easily perform the pattern control for turning on / off a plurality of loads 2 collectively by one operation switch S, and to freely change the loads 2 to be the target.

[0010]

By the way, in the above-mentioned pattern control, since each load 2 can be individually controlled by the operation switch S of the input terminal device 1 after the control, the target of the post-control pattern control is controlled. It was not possible to return the load 2 which has become to the original state. For example, when power is supplied from a backup power supply during a power failure, only the minimum required load 2 among the loads 2 that were operating is continued, the remaining load 2 is stopped, and each load 2 It was impossible to control to restore the state before the power failure.

The present invention has been made in view of the above points, and its object is to perform forced control by operating only a specific load in advance by simply adding it to a conventional remote monitoring control system. Another object of the present invention is to provide a forced control unit of a remote monitoring control system capable of returning the control state of the load to the original state before entering the forced control when the forced control is released.

[0012]

In order to achieve the above object, according to the invention of claim 1, a plurality of terminals are connected to a transmission unit via a two-wire type signal line, and address data is transmitted from this transmission unit. Each terminal is individually accessed by transmitting a transmission signal including
When the monitoring data based on the monitoring input transmitted from the terminal is received during the signal reply period set in synchronization with the transmission signal,
The control data is created based on the monitoring data, the control data is transmitted to the terminal device corresponding to the terminal device that generated the monitoring data by the transmission signal, and the terminal device operates the controlled load according to the received control data. It is used in a remote monitoring control system that generates an output to control the terminal unit, which is a terminal unit having an individual address when viewed from the transmission unit, and a transmission unit when viewed from the terminal unit connected to the signal line and the terminal unit. A master unit capable of exchanging data between terminals and a function of connecting and disconnecting the signal line connected to the terminal unit and the transmission unit, which is controlled by the terminal unit, and connecting and disconnecting the signal line and the master unit. The terminal unit has a function of storing the control content of each load in advance during forced control, and the transmission signal and the terminal transmitted from the transmission unit during normal operation. The function to store the load status connected to the terminal unit based on the reply signal returned from the transmission unit to the transmission unit, and the signal line switching unit transmits the control data for the forced control by the transmission signal from the transmission unit. With the control function to disconnect the unit from the signal line and connect the signal line to the master unit, and to return the connection of the signal line to the normal time when the control data of the end of the forcible control is sent by the transmission signal from the transmission unit, When the master unit receives a compulsory control notification from the terminal unit, it transmits control data to the corresponding terminal unit by a transmission signal based on the control contents of each load at the time of compulsory control stored in the terminal unit and does not contrast. The control data for operating the load is transmitted to the terminal device corresponding to the load of the above by the transmission signal, and the terminal unit stores the notification that the end of the forced control is notified by the terminal unit. Characterized by transmitting the transmission signals and control data such that the state of the original state of each load terminal unit corresponding to each load based on the load state of the control immediately before.

According to a second aspect of the present invention, in the first aspect of the present invention, there is provided means for storing and setting the controllable load and the uncontrollable load under forced control based on the monitoring data from the terminal device, The load control is performed based on the monitoring data from the terminal device under the forced control based on the stored and set contents. According to a third aspect of the invention, in the first aspect of the invention, the forced control is set to a plurality of levels, the loads serving as the forcible control contrasts are divided for each of the above levels, and a plurality of control data for the forcible control are transmitted from the transmission unit. When it is transmitted, it is characterized in that it controls the load of the control corresponding to the forced control of a high priority level of a predetermined priority of the forced control.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the remote monitoring and control system is powered by a commercial power source during normal operation and by a private power generator during a power failure, and the transmission unit is a detecting means for detecting a power failure of the commercial power source. Control data for each load during forced control that is stored in advance in the terminal unit by transmitting control data for forced control or termination of forced control by a transmission signal according to the monitoring data from the terminal device that uses the detection data of Is set according to the capacity and importance of the private power generator.

[0015]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 2 shows an overall configuration of a remote monitoring control system using one embodiment of the present invention. The compulsory control unit 7 connects the signal line 4 ′ from the transmission unit 5 to the first signal line connection terminal 10a. And each input terminal 1
a and the signal line 4 connecting the output terminal 3 are connected to the second signal line connection terminal 10b, and normally the signal line 4'and the signal line 4 are connected in the compulsory control unit 7. The transmission signal Vs from the transmission unit 5 can be transmitted to each of the terminals 1 and 3, and the reply signal from each of the terminals 1 and 3 can be sent to the transmission unit 5 side.

Therefore, the input terminal 1a provided with the individual switch S or the input terminal 1b for dimming control, and the input terminal equipped with the setting switch for setting the target load 2 for pattern control or group control. Based on the operation data from the device 1c, that is, the monitoring data, the transmission unit 1 performs normal monitoring control as in the conventional system.

As shown in FIG. 1, the compulsory control unit 7 has a terminal unit 11 including a CPU having a terminal device function similar to that of the terminal devices 1 and 3, and a function for performing the same supervisory control as the transmission unit 5. A master unit 12 composed of a CPU having a signal transmission / reception unit, signal transmission / reception units 13a and 13b respectively connected to signal line connection terminals 10a and 10b, and a line inserted between signal input / output terminals of both signal transmission / reception units 13a and 13a. Wire connection terminal 1
Signal line 4 ′ connected to 0a and signal line connection terminal 1
0b and the signal line 4 connected to each signal transmitting / receiving unit 13
When connecting through a and 13b and the signal transmitting / receiving unit 13
A signal line switching circuit 14 for switching between the case of disconnecting the line connecting a and 13b and connecting the signal terminal of the master unit 12 to the signal input / output terminal of the signal transmitting / receiving unit 13b by the control of the terminal unit 11, and the power supply line connection A power supply unit 16 for obtaining a DC voltage required for each unit in the unit from a power supply connected to the terminal 22.
And a signal line short-circuit display section 17 that detects when a short circuit occurs between the signal line connection terminals 10b and performs lighting display, and the terminal section 11 and the main unit section 12 each have an operation program. The stored ROMs 18 and 19 are connected to the data buses DB ₁ and DB ₂ and the address buses AB ₁ and AB ₂ , respectively, and the data buses DB ₁ and DB _{1 of} the terminal unit 11 are
A data bus DB ₃ and an address bus AB ₃ from the base unit 12 are connected to AB ₁ , and data can be exchanged between the terminal unit 11 and the base unit 12.

The terminal unit 11 has an individual address written in the EEPROM 20, and when this individual address and the address of the transmission signal Vs sent from the transmission unit 5 match, a signal is sent based on the control data of the transmission signal Vs. The line switching circuit 14 is controlled to be switched. In addition to the individual address of the terminal unit 11, the EEPROM 20 stores a pattern address in which the contents of the forcible control are set, a group address in which a load that can be controlled during the forcible control is set, and a control pattern is stored by an individual switch. The individual address and the individual address when the control pattern is confirmed by the individual switch are written, and this storage setting is the setting data transmitted and received by the optical wireless signal from the external address setter 8. The data is received by the unit 21, and the terminal unit 11 writes it in the EEPROM 20 based on the received data.

The input port of the terminal unit 11 has a control pattern storage / confirmation switch SW ₁ and a forced release switch SW 1.
₂ and the level changeover switch SW ₃ are connected to each other, and when the control pattern storage / confirmation switch SW ₁ is pressed for a time shorter than a predetermined time (for example, 2 seconds), the terminal unit 11 causes the forced control pattern set above. The operation data of the control pattern storage / confirmation switch SW ₁ is sent to the transmission unit 5 as a reply signal for transferring the setting contents corresponding to the address and the group address from the transmission unit 5,
The setting contents transmitted from the transmission unit 5 in response to this reply signal are stored in the internal table of the terminal unit 11 in correspondence with each address.

Control pattern storage / confirmation switch SW
_{When 1} is pressed for a predetermined time (2 seconds) or more, the terminal section 11 confirms the control pattern, and the compulsory control pattern address stored in the EEPROM 20, the group address, and the setting contents stored in the internal table are set in the address setting transmitting / receiving section. 21 to the address setting transmission / reception unit 21.
Further, the forced release switch SW ₂ is a switch for releasing the forced control operation, and when the forced release switch SW ₂ is operated, the terminal unit 11 stops the forced control operation and shifts to an operation to return to the original state. . Level switch SW
₃ is for setting the pattern address and group address for compulsory control to be set to multiple levels, and priorities are pre-determined for the levels. At the output port of the terminal unit 11 in which the master unit 12 operates so as to perform control or group control, a display unit 23 that displays whether or not a wireless signal for forced pattern storage / confirmation is received.
Is provided and blinks twice when storing the setting contents of the control pattern, blinks once when confirming the control pattern, and blinks several times after the address setting is completed.

On the other hand, a display changeover switch SW ₄ is provided at the input port of the master unit 12, and if the display changeover switch SW ₄ is ON, for example, the input terminal 1 of the remote monitoring control system under forced control is displayed. The master unit 12 causes each terminal device 1 to display the lighting of a display lamp attached to the operation switch S, and to turn off the display lamp when it is off.
The control data is sent by the transmission signal Vs.

FIG. 4 shows a front view of the compulsory control unit 7, in which 24 is a ground terminal. By the way, in the case of FIG. 2, the forced control unit 7 performs the forced control detection by connecting the input terminal 1d for inputting the ON / OFF signal of the non-voltage contact 6 as the operation signal to the signal line 4. However, the non-voltage contact 6 is configured by a switch that is turned on for power failure detection detection of the power supply, for example.

The operation of this embodiment will be described with reference to the flowchart of FIG. First, in a normal time when no power failure occurs, the signal line switching circuit 14 of the compulsory control unit 7 operates as shown in FIG.
The line connecting the signal input / output terminals of a and 13b is in the ON state. At this time, the signal terminal of the master unit 12 is in a state of being separated from the line. On the other hand, the terminal portion 11 is in a state where the signal terminal is connected to the line. Although the signal line switching circuit 14 is shown as a switch contact in the illustrated example, it is actually composed of a logic circuit.

The terminal unit 11 constantly monitors the transmission signal Vs from the transmission unit 1 and the return signal of each input terminal device 1, and determines the state of the load 2 connected to the output terminal device 3 with the operation switch S. An operation of storing in a table in the terminal unit 11 is performed according to control data of a display element attached to the. Now, when a power failure of the commercial power source occurs, the private power generation device starts to move, and the power supply to the remote monitoring and control system is switched from the commercial power source to the private power generation device. At the same time, the non-voltage contact 6 for detecting the power failure of the commercial power supply is turned on.
The input terminal 1d responds to this turning on by the interrupt signal V
i in current mode to transmission unit 5 forced control unit 7
It is sent through the internal signal transmission / reception units 13a and 13b. The transmission unit 5 performs interrupt processing in response to the interrupt signal Vi, and returns monitoring data indicating that the non-voltage contact 6 is turned on from the input terminal 1d. Then, based on this monitoring data, the transmission unit 5 accesses the terminal unit 11 of the compulsory control unit 7 to which the address corresponding to the input terminal 1d is set, and controls the signal line switching unit 14. Give control data. The terminal unit 11 controls the signal line switching unit 14 based on this control data.
As shown in (b), the signal terminal of the master unit 12 is connected to the signal transmitting / receiving unit 13b, and the signal transmitting / receiving unit 13a is
The line between the signal transmitting / receiving unit 13b is cut off. Base unit 1
The terminal 2 receives notification of forced control from the terminal unit 11, and starts operating as a transmission unit when viewed from the terminals 1 and 3 connected to the signal line 4. That is, the forced control operation is started. In this case, the base unit 12 transfers the setting content of the forced control from the terminal unit 11 through the data bus DB ₃ , and based on this content, the target load 2 is forcibly operated and the control data for stopping the operation of the non-target load 2 is transmitted. The corresponding output terminal 3 is sequentially accessed by the transmission signal Vs. As a result, for example, only the load 2 or the load 2 of high importance set in advance so as not to exceed the capacity of the private power generator is continued, and the other loads 2 are forcibly stopped or fired. It can be used properly, for example, by forcibly turning on the lighting of the emergency passage.

When the forced release switch SW ₂ is operated during the forced control operation, the terminal unit 11 informs the base unit 12 that the forced release switch SW ₂ has been operated,
The master unit 12 causes the terminal unit 11 to transfer the load state data immediately before the compulsory control operation stored in the terminal unit 11, and each output terminal device 3 based on the content of the transferred load state data. The transmission signal Vs for controlling the above is sequentially transmitted to restore the loads 2 connected to the respective output terminals 3 to the original operating state.

After that, the terminal unit 11 is connected to the transmission unit 5
An interrupt signal Vi is sent to the signal receiving unit 13a.
Transmission unit 5 is returned to the operation data of the forced release switch SW ₂ from the input terminal unit 1d after interrupt processing as the monitoring data, transmission to return the signal line switching circuit 14 to the terminal unit 11 based on the monitoring data to the normal Signal V
Send s. Therefore, the terminal unit 11 performs control for returning the signal line switching circuit 14 to the original state, and the remote monitoring control system returns to the normal state.

Further, during the forced control operation, when the master unit 12 receives the operation data of the input terminal 1a connected to the signal line 4 as the monitoring data after the interrupt processing, the master unit 12 monitors the operation data. It is judged whether or not the input terminal device 1a which has returned the data is the address corresponding to the compulsory control unit 7, that is, the address of the input terminal device 1d, and the monitoring data from the input terminal device 1d, that is, the nonexistence. When the voltage contact 6 is restored, the load state data immediately before the forced control operation stored in the terminal unit 11 is stored in the terminal unit 1.
1 to transmit the transmission signal Vs for controlling each output terminal 3 based on the content of the transferred load state data.
Are sequentially transmitted to return the loads 2 connected to the respective output terminals 3 to their original operating states.

After that, the terminal section 11 is connected to the signal transmitting / receiving section 13a through the signal switching circuit 14, and the terminal section 11 is connected.
Then, the interrupt signal Vi is sent. After the interrupt processing, the transmission unit 5 causes the input terminal 1d to return the status data of the non-voltage contact 6 as monitoring data, and based on the monitoring data, a transmission signal for returning the signal line switching circuit 14 to the normal state. Vs is transmitted. Therefore, the terminal unit 11 performs control for returning the signal line switching circuit 14 to the original state, and the remote monitoring control system returns to the normal state. In this way, if the forced release switch SW ₁ is operated or the non-voltage contact 6 connected to the input terminal 1d is restored, the forced control unit 7 releases the forced control operation and the system immediately before the forced control is started. Perform the operation to return to the state.

Further, if the operation switch S corresponding to the input terminal 1a other than the input terminal 1d is operated during the forced control operation, the master unit 12 causes the operation data of the operation switch S, That is, whether or not the address of the input terminal device 1a ... Returning the monitoring data is the address corresponding to the output terminal device 3 capable of controlling the load 2 under the forced control is stored in the EEPROM 20. The load 2 is controlled by referring to the address of the load 2 through the terminal unit 11, and if possible, the transmission signal Vs is sent to the output terminal 3 to control the load 2.

In the normal state, the terminal unit 11 checks whether the command for the forced pattern confirmation is sent from the address setter 8. If the command is sent, the terminal unit 11 enters the confirmation mode and is forced. If there is a predetermined operation of the pattern storage / confirmation switch SW ₂ , the setting contents written in the EEPROM 20 are read out and the address transmitting / receiving unit 2
The optical wireless signal is transmitted to the address setting device 8 through 1 and is displayed on the display device of the address setting device 8. Therefore, the user can understand the content of the forced pattern control by the display on the display of the address setting device 8.

In the above embodiment, the input terminal 1d for detecting the forced control is provided, but as shown in FIG. 6, the command signal is received from the central monitoring board (not shown). An NCU 30 for transmitting and receiving a load control signal based on the above and a signal indicating a load state to and from the transmission unit 5 ′ is provided, and a signal for forced control and a signal for canceling the signal are transmitted from the central monitoring panel. 'May be given to.

Since the operation of the transmission unit 5'when receiving the signal of the forced control and the operation when receiving the signal of the unlocking of the forced control are the same as those in the first embodiment, the description thereof will be omitted.

[0033]

According to the invention of claim 1, a plurality of terminals are connected to a transmission unit via a two-wire type signal line, and a transmission signal including address data is time-division multiplexed from the transmission unit to the signal line. When each terminal device is accessed individually by sending in the above, and the monitoring data based on the monitoring input transmitted from the terminal device is received during the signal reply period set in synchronization with the transmission signal, the control data is sent based on the monitoring data. make,
A remote monitoring control system that transmits control data to the terminal device corresponding to the terminal device that generated the monitoring data by the transmission signal and generates an output for controlling the operation of the controlled load based on the received control data in the terminal device. Used as a terminal unit that has a separate address when viewed from the transmission unit, and a master unit that serves as a transmission unit when viewed from the terminal device connected to the signal line and is capable of exchanging data with the terminal unit. And a signal line switching unit controlled by the terminal unit and having a function of connecting and disconnecting the signal line to which the terminal device is connected and the transmission unit and a function of connecting and disconnecting the signal line and the master unit. The terminal unit has a function to store the control contents of each load during forced control in advance, and a transmission signal transmitted from the transmission unit at normal times and a reply signal returned from the terminal unit to the transmission unit. Based on the function to store the load status connected to the terminal device, the signal line switching unit disconnects the transmission unit from the signal line and disconnects the signal line when the control data for compulsory control is sent by the transmission signal from the transmission unit. It has a control function to connect to the master unit and return the connection of the signal line to the normal state when the control data of the end of the forced control is sent from the transmission unit by the transmission signal. When notified, the control data is transmitted by the transmission signal to the corresponding terminal device based on the control contents of each load during the forced control stored in the terminal unit, and the load is applied to the terminal device corresponding to the non-contrast load. The control data for operating the control unit is transmitted by the transmission signal, and when the notification of the end of the forced control is sent from the terminal unit, it is stored in each terminal based on the load state immediately before the start of the forced control. Since control data is transmitted to the corresponding terminal device by the transmission signal so that the state of each load is returned to the original state, when the forced control is detected, only the preset load is forcibly operated and during this forced control In this case, even if the load state of the forced control contrast changes, if the forced control is released, the load state can be returned to the original state immediately before the forced control. There is an effect that it is possible to selectively use and by using the configuration of the conventional remote monitoring control system.

According to a second aspect of the present invention, in the first aspect of the invention, there is provided means for storing and setting the controllable load and the uncontrollable load under forced control based on the monitoring data from the terminal device, Since the load control is performed based on the monitoring data from the terminal device under the forced control based on the stored contents, the pattern setting of the conventional remote monitoring control system can be used.

According to a third aspect of the present invention, in the first aspect of the present invention, the forced control is set to a plurality of levels, the loads as the forced control contrasts are divided for each of the above levels, and the control data of the plurality of forced control are When the transmission is transmitted from the transmission unit, the control load is controlled corresponding to the forcible control of the higher priority level of the forcible control set in advance, so that a plurality of forcible controls can be performed based on the priority order. effective.

According to a fourth aspect of the present invention, in the first aspect of the present invention, the remote monitoring control system is powered by a commercial power source during normal operation and by an in-house power generator during a power failure, and the transmission unit detects a power failure of the commercial power source. Control data for each load during forced control that is stored in advance in the terminal unit by transmitting control data for forced control or termination of forced control by a transmission signal according to the monitoring data from the terminal device that uses the detection data of Since it was set according to the capacity and importance of the private power generator, only the load corresponding to the capacity of the private power generator can be automatically operated in the event of a power failure, and the original load operating state can be restored when the power is restored. There is an effect that load management at the time of power failure can be performed using the conventional remote monitoring control system.

[Brief description of drawings]

FIG. 1 is a circuit block diagram of one embodiment of the present invention.

FIG. 2 is an overall system diagram of a remote monitoring control system using the same as above.

FIG. 3 is an operation explanatory diagram of the above.

FIG. 4 is a front view of the same.

FIG. 5 is a flowchart for explaining the operation of the above.

FIG. 6 is an overall system diagram of another example of a remote monitoring control system using the same as above.

FIG. 7 is a system configuration diagram of a conventional example.

FIG. 8 is an explanatory diagram of a transmission signal.

[Explanation of symbols]

 10a, 10b Signal line connection terminal 11 Terminal part 12 Master unit part 13a, 13b Signal transmission / reception part 14 Signal line switching circuit

Claims (4)

[Claims] 1. A plurality of terminals are connected to a transmission unit via a two-wire type signal line, and a transmission signal containing address data is sent from the transmission unit to the signal line by time division multiplexing, whereby each terminal is sent. When the monitoring data based on the monitoring input transmitted from the terminal is received during the signal reply period set in synchronization with the transmission signal, the control data is created based on the monitoring data and the monitoring data is generated. Used in a remote monitoring control system for transmitting control data to the terminal device corresponding to the above-mentioned transmission signal by the transmission signal, and generating an output for controlling the operation of the controlled load by the received control data in the terminal device, Data is transmitted between the terminal unit, which is a terminal unit having an individual address as seen from the transmission unit, and the transmission unit, which is seen from the terminal unit connected to the signal line. It has a master unit that can send and receive, and a function that is controlled by the terminal unit and that separates and connects the signal line to which the terminal device is connected and the transmission unit, and a function that connects and disconnects the signal line and the master unit. Equipped with a signal line switching unit,
The terminal unit is connected to the terminal unit based on the function of pre-storing the control content of each load during forced control and the transmission signal transmitted from the transmission unit in normal times and the reply signal returned from the terminal unit to the transmission unit. The function to memorize the load status and the control data for forced control sent from the transmission unit by the transmission signal disconnect the transmission unit from the signal line by the signal line switching unit and connect the signal line to the master unit to force it. It has a control function to return the connection of the signal line to the normal state when the control data of the end of the control is sent from the transmission unit by the transmission signal, and the master unit notifies the terminal unit when the terminal unit notifies it of the forced control. Based on the stored control contents of each load at the time of forced control, control data is transmitted to the corresponding terminal device by a transmission signal and the load is applied to the terminal device corresponding to the non-contrast load. The control data to be generated is transmitted by a transmission signal, and if the terminal unit has notified that the forced control has ended, the terminal unit stores each load based on the load state immediately before the forced control starts stored in the terminal unit. A forced control unit for a remote monitoring and control system, characterized in that control data is transmitted by a transmission signal so that the above state is returned to the original state. 2. Under forced control, a means for storing and setting a controllable load and a controllable load based on monitoring data from the terminal device is provided, and the force control is performed based on the stored and set content. The forced control unit of the remote monitoring control system according to claim 1, wherein the load control is performed based on the monitoring data from the terminal device. 3. Forced control is set to a plurality of levels, a load serving as a forced control contrast is divided for each level, and when a plurality of forced control control data are transmitted from a transmission unit, the forced control is performed. 2. The forcible control unit of the remote monitoring and control system according to claim 1, wherein a control load corresponding to the forcible control of a higher priority level determined in advance is controlled. 4. The remote monitoring and control system is powered by a commercial power source during normal operation and by a private power generator during a power outage, and a transmission unit is a terminal device that uses the detection data of the detection means for detecting a power failure of the commercial power source as a monitoring input. Control data for forced control or termination of forced control is transmitted by a transmission signal according to the monitoring data, and the control content of each load during the forced control stored in the terminal unit in advance is determined according to the capacity and importance of the private power generator. The forced control unit of the remote monitoring and control system according to claim 1, wherein the forced control unit is set.