JPH06269052A - Remote supervisory control system - Google Patents

Abstract

PURPOSE:To prevent a time lag for a switching from an inhibit state interrupting a signal line with a gate device inserted to the signal line into an enable state when a transmission signal is transmitted through the gate device. CONSTITUTION:A gate device 34 is inserted to a predetermined position of a signal line Ls. The gate device 34 change in an alternative way an enable state in which the transmission of an interrupt signal from a control terminal equipment 32 connecting to a 2nd signal line Ls2 remote from the gate device 34 to a transmission processing unit 31 is authorized and an inhibit state inhibiting the transmission. The gate device 34 sends a transmission signal to the control terminal equipment 32 making an interruption request to allow the equipment 32 to release a set interrupt flag upon the receipt of an interrupt signal from the control terminal equipment 32 in the inhibit state.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention comprises a plurality of terminals connected to a transmission processing device through a two-wire signal line in a time division multiplex connection system, and operating switches provided in the terminals. The present invention relates to a remote monitoring control system for turning on / off a load provided in another terminal device in accordance with the above.

[0002]

2. Description of the Related Art Conventionally, a remote monitoring control system has been considered in which a plurality of operation terminals and control terminals are connected to a transmission processing device through a two-wire signal line in a time division multiple connection system. ing. Addresses are set separately for the operation terminal and the control terminal, and the transmission processing device individually recognizes each operation terminal and each control terminal by the address. The operation terminal includes a switch and transmits an interrupt signal generated by operating the switch to the transmission processing device. When the transmission processing device receives the interrupt signal, it searches for the operation terminal device requesting the interrupt,
Further, the control data is transmitted to the control terminal device whose correspondence is preset by the retrieved operation terminal device and address. The control terminal device that has received the control data controls the connected load in accordance with the operation of the switch.

More specifically, the remote monitoring and control system has a structure shown in FIG. 9, for example. A plurality of operation terminals 32 for monitoring the operation state of the switch SW and a plurality of control terminals 33 for controlling the load L are connected to the transmission processing device 31 via a two-wire signal line Ls. It Separate addresses are set in the operation terminal 32 and the control terminal 33, and the transmission processing device 31 uses the addresses to operate the operation terminal 32 and the control terminal 33.
Recognize individually.

The transmission processing device 31 is connected to the signal line Ls by
A transmission signal V having a format as shown in FIGS.
send s. That is, the transmission signal Vs includes the start pulse ST indicating the start of signal transmission, the mode data signal MD indicating the signal mode, the operation terminal 32 and the control terminal 33.
, An address data signal AD for transmitting address data for individually calling, a control data signal CD for transmitting control data for controlling the load L, a checksum data signal CS for detecting a transmission error, an operation terminal device 32, A multi-pole (± 24 times the signal return period WT, which is a time slot for receiving a return data signal from the control terminal 33).
V) is a time division multiplexed signal, and data is transmitted by pulse width modulation.

In each operation terminal device 32 and each control terminal device 33, when the address data transmitted by the transmission signal Vs received via the signal line Ls matches the preset address data, the transmission signal Vs is transmitted. The control data is fetched from the device and the return data is synchronized with the signal return period WT of the transmission signal Vs as the current mode signal (a signal sent by short-circuiting the signal lines Ls via an appropriate low impedance). Send it back.

Further, the transmission processing device 31 is provided with dummy signal transmitting means and interrupt signal processing means. The dummy signal transmitting means always sends out a dummy transmission signal in which the mode data signal MD is in the dummy mode. Further, the interrupt signal processing means receives the interrupt signal Vi when one of the operation terminals 32 receives the interrupt signal Vi as shown in FIG.
The operation terminal device 32 that has generated is searched, and the address data set in the operation terminal device 32 is returned as reply data. That is, the dummy signal transmitting means always sends the dummy transmission signal to the signal line Ls, and the interrupt signal Vi generated from the operation terminal 32 in accordance with the operation of the switch SW is synchronized with the start pulse signal ST of the dummy transmission signal. When it is detected, the transmission processing device 31 sends the transmission signal Vs in which the mode data signal MD is in the address confirmation mode by the interrupt processing means to the signal line Ls. In each operation terminal 32, an interrupt flag is set to request an interrupt when the interrupt signal Vi is generated,
In the operation terminal 32 in which the interrupt flag is set, when the mode data signal MD receives the transmission signal Vs in the address confirmation mode, the signal return period W of this transmission signal Vs.
In synchronization with T, the address data set in the operation terminal 32 is returned as reply data. In this way, the transmission processing device 31 can acquire the address of the operating terminal device 32 that generated the interrupt signal Vi.

In the transmission processing device 31, the interrupt signal Vi
When the address of the operation terminal 32 that has generated
The control data to be transmitted to the control terminal device 33 to which the load L having the preset correspondence relationship with the switch SW is connected is generated, and the transmission signal Vs including the control data is transmitted to the signal line Ls to perform the corresponding control. The control data is transmitted to the control terminal 33 to control the load L.

In the operation terminal 32 and the control terminal 33, the transmission signal Vs transmitted through the signal line Ls, respectively.
By rectifying and stabilizing the full-wave, the power supply for the operation of the internal circuit is obtained. A power source is separately provided for the load L connected to the control terminal device 33. By the way, in the remote monitoring and control system, as shown in FIG. 1, it is considered to provide a gate device 34 on the signal line Ls. The gate device 34 is inserted at a predetermined position of the signal line Ls, and is connected to the signal line Ls farther than the gate device 34 with respect to the transmission processing device 31.
It is configured such that a permission state for permitting transmission of the interrupt signal Vi from 1 to the transmission processing device 31 and a prohibition state for prohibiting transmission thereof can be selectively selected. Also, the gate device 3
Even when No. 4 is in the prohibited state, the transmission signal Vs from the transmission processing device 31 is transmitted to the operation terminal 32 and the control terminal 33.

Here, the operation terminal 3 is in the prohibited state.
When the switch SW of No. 2 is operated, the interrupt signal Vi is not transmitted to the transmission processing device 31, so that the load L is not operated, but since the interrupt flag is set in each operation terminal device 32, When returning to the permitted state, the transmission processing device 31 cannot correctly search for the operation terminal 32.

In order to solve such a problem, when the gate device 34 is returned from the prohibited state to the permitted state, the operation terminals 32 and the control terminal 32 are controlled by forcibly short-circuiting the signal lines Ls. It is considered that the power supply to the terminal device 33 is stopped and the interrupt flag is invalidated. That is, a state in which the transmission signal Vs is not transmitted to the operation terminal device 32 and the control terminal device 33 is set for a certain period of time so that the interrupt flag cannot be held.

[0011]

By the way, in the operation terminal device 32 and the control terminal device 33, since the transmission signal Vs is rectified and smoothed and then stabilized to obtain the power source, the signal line Ls is obtained.
Even if the lines are short-circuited, the voltage does not drop for a relatively long time, and it takes about 20 seconds in the current configuration until the interrupt flag is completely erased. As described above, it takes a relatively long time to shift the gate device 34 from the prohibited state to the permitted state, and during this period, the operation of the switch SW is invalid.
However, there is a problem that there is a waiting time until the operation of the switch SW becomes effective even though the operating state of the switch is switched.

An object of the present invention is to solve the above problems, and to provide a remote monitoring control system in which the operation of the switch becomes effective without waiting when the operating state of the gate device is switched. Is.

[0013]

In order to achieve the above object, the invention of claim 1 time-divisionally divides a plurality of terminals each having an address into a transmission processing device through a two-wire signal line. The connection is made by the multiple connection method, and the transmission processing device individually accesses the terminals by sending the transmission signal including the address data to the signal line, and synchronizes with the transmission signal according to the operation of the switch provided in the terminal. The generated interrupt signal is received, the terminal device requesting the interrupt is searched, and the control data is generated and transmitted to the other terminal device whose correspondence relationship with the searched terminal device is preset. However, in the remote monitoring control device that controls the load connected to the terminal device according to the control data, the signal line is inserted at a predetermined position on the signal line and is distant from the predetermined position with respect to the transmission processing device. A gate device that selectively switches between a permitting state that permits transmission of an interrupt signal from the connected terminal device to a transmission processing device and a prohibiting state that prohibits transmission, and a signal between the transmission processing device and the gate device. A switching operation terminal is provided which is connected to the line to switch between a permitting state and a prohibiting state of the gate device, and when the gate device receives an interrupt signal from the terminal device in the prohibited state, the terminal device requesting the interrupt is It is characterized in that a transmission signal for canceling an interrupt request is transmitted.

According to a second aspect of the present invention, in addition to the first aspect of the invention, each terminal equipped with a switch is provided with an operation indicator light for displaying a control state of the load corresponding to the operation of the switch, and the gate device is prohibited. When the status is set to the transmission processing device, the operation indicator lights of all terminals connected to the signal line farther than the gate device to the transmission processing device are turned off, and the transmission processing device Display that selectively switches between the display state that lights up the operation indicator lamp of each terminal connected to the signal line farther than the gate device so as to correspond to the control state of the load before it is set to the prohibited state A switching device is provided.

According to a third aspect of the present invention, a plurality of terminals each having an address separately are connected to the transmission processing device via a two-wire type signal line in a time division multiplex connection method, and the transmission processing device sets the address data. By individually transmitting the transmission signal including the signal to the signal line, the terminal device is individually accessed, the interrupt signal generated in synchronization with the transmission signal in response to the operation of the switch provided on the terminal device is received, and the interrupt is requested. The terminal device that is searching is searched for, the control data is generated and transmitted to the other terminal device whose correspondence relationship with the searched terminal device is preset, and the load connected to the terminal device is controlled according to the control data. In a remote monitoring control device for controlling, a lighting provided as a load to a terminal device inserted at a predetermined position on a signal line and connected to a signal line farther than the predetermined position with respect to a transmission processing device. A lighting control device that selectively switches between a thinning lighting state in which only a predetermined lighting load of the load is turned on and a normal lighting state in which each lighting load is turned on by operating a switch, and a transmission processing device. Provided with a power supply switching terminal device which is connected to a signal line between the lighting control device and the lighting control device is switched from a normal lighting state to a thinning lighting state when the power source is switched to an emergency power source having a smaller power feeding capacity than the regular power source, The lighting control device, based on the data stored in the storage unit that stores data regarding the lighting state of each lighting load before being set to the thinning lighting state and the data stored in the storage unit when the thinning lighting state shifts to the normal lighting state. And a return processing unit for lighting the load in the lighting state before being set to the thinning lighting state.

[0016]

According to the first aspect of the present invention, the gate device is provided on the signal line, and the interrupt signal from the terminal connected to the signal line farther than the gate device from the transmission processing device is transmitted to the transmission processing device. When the gate device is set to the inhibit state, the interrupt request signal is received from the terminal device and the terminal requesting the interrupt is enabled. A transmission signal that causes the device to cancel the interrupt request. That is, if an interrupt signal is generated from the terminal device in the disabled state, a transmission signal is generated from the gate device to immediately cancel the interrupt request. Therefore, when the disabled state is changed to the enabled state, the operation of canceling the interrupt request is performed. Therefore, the switch operation becomes effective immediately after the transition from the prohibited state to the permitted state.

According to the second aspect of the present invention, the terminal equipped with the switch is provided with the operation indicator lamp for displaying the control state of the load, and the gate device is provided with the display switching device.
When the gate device is set to the prohibition state, the operation indicator lights of all terminals connected to the signal line farther from the gate device to the transmission processing device are turned off, and the prohibition state It is possible to switch to the display state in which the operation indicator lamp is turned on so that the lighting state in the permission state before being set to is set. Therefore, if it is necessary to know the lighting state in the permission state before being set to the prohibition state, the display state can be selected. In the prohibition state, the operation of the switch is invalid, so it is necessary to light the operation indicator light. If there is not, it is possible to indicate that the switch operation is invalid by selecting the all-off state.

According to a third aspect of the present invention, a lighting control device is provided on a signal line, and a lighting load is provided as a load on a terminal device connected to a signal line farther than the lighting control device with respect to the transmission processing device. The lighting control device is configured to selectively switch between a thinned lighting state in which only a predetermined part is lit and a normal lighting state in which lighting is performed according to a switch operation. The lighting state before the lighting load is set to the thinning lighting state based on the data stored in the storage unit by the restoration processing unit when the data regarding the lighting state of the To turn it on. Also, when the power supply is switched from the emergency power supply, which has a smaller power supply capacity than the regular power supply, the power supply switching terminal unit causes the lighting control device to switch from the normal lighting state to the thinning lighting state. When becomes smaller, the thinned lighting state is selected to suppress the power consumption. Moreover, the lighting state of each lighting load in the normal lighting state before the transition to the thinning lighting state is stored in the storage unit, and when the thinning lighting state is returned to the normal lighting state, the lighting state stored in the storage unit is restored. After the recovery from the power failure, the lighting load can be returned to the original lighting state.

[0019]

(Embodiment 1) As shown in FIG. 1, as in the conventional configuration, a transmission processing device 31 is provided via a two-wire signal line Ls.
The operation terminal 32 and the control terminal 33 are connected to each other. A gate device 34 is inserted at a key part of the signal line Ls,
The signal line Ls is sandwiched between the gate device 34 and the transmission processing device 31.
And a portion farther than the gate device 34 with respect to the transmission processing device 31. In order to facilitate the following description, a portion of the signal line Ls between the transmission processing device 31 and the gate device 34 will be referred to as the first signal line Ls.
_1. The part farther from the gate device 34 than the transmission processing device 31 is referred to as a _second signal line Ls ₂ . First
The switching operation terminal 35 is connected to the signal line Ls ₁ .
The operation terminal 32 has a switch SW and an operation indicator L.
D ₁ and LD ₂ are provided, and a load L which is a lighting load is connected to the control terminal device 33.

As shown in FIG. 2, the gate device 34 includes a transmission / reception circuit 11 connected to the _first signal line Ls ₁ and a second transmission / reception circuit 11.
And a transmission / reception circuit 12 connected to the signal line Ls ₂ . The transmission signal separated by the transmission / reception circuit 11 from the transmission signal Vs transmitted on the first signal line Ls ₁ is input to the control circuit 10 including a microcomputer and the transmission gate 13. The transmission gate 13
The transmission signal passing through the first signal line Ls ₁ and separated by the transmission / reception circuit 11, and the control circuit 10 based on the transmission signal
One of the transmission signal generated by and the transmission signal is input to the transmission / reception circuit 12, and is transmitted to the second signal line Ls ₂ through the transmission / reception circuit 12. The reply signal separated from the transmission signal Vs transmitted through the second signal line Ls ₂ by the transmission / reception circuit 12 is input to the control circuit 10 and the reply gate 14. The reply gate 14 is the second
It is selected whether or not the reply signal separated by the transmission / reception circuit 12 through the signal line Ls ₂ is input to the transmission / reception circuit 11.

The transmission gate 13 and the reply gate 14 are controlled by the control circuit 10. When the transmission gate 13 inputs the transmission signal separated by the transmission / reception circuit 11 to the transmission / reception circuit 12, the reply gate 14 is separated by the transmission / reception circuit 12. A permitted state is entered in which the transmitted reply signal is input to the transmission / reception circuit 11. Further, when the transmission gate 13 inputs the transmission signal separated by the transmission / reception circuit 11 only to the control circuit 10, the reply gate 14 enters a prohibited state in which the reply signal separated by the transmission / reception circuit 12 is input only to the control circuit 10. . Whether to set the transmission gate 13 and the reply gate 14 to the permission state or the inhibition state is determined by the inhibition / permission determination circuit 15 connected to the _first signal line Ls ₁ through the transmission / reception circuit 11.
The transmission gate 13 and the reply gate 14 are controlled through the control circuit 10 based on the determination by the prohibition / permission determination circuit 15.

The prohibition / permission determination circuit 15 has an address like the operation terminal 32 and the control terminal 33, and an address table in the transmission processing device 31 is formed so as to correspond to the switching operation terminal 35. Has been done. Therefore, when the switching operation terminal device 35 is operated, the setting state of the switching operation terminal device 35 is input to the prohibition / permission determination circuit 15 through the transmission / reception circuit 11 by the transmission signal Vs from the transmission processing device 31. Gate 13 and reply gate 1
It is determined whether 4 is set in the permitted state or the prohibited state.

In the permitted state, the transmission / reception circuits 11 and 12 are connected via the transmission gate 13 and the reply gate 14, so that the transmission signal Vs from the transmission processing device 31 passes through the gate device 34. That is, in the permission state, the transmission signal from the transmission processing device 31 is transmitted to all the operation terminals 32 and the control terminals 33 connected to the first signal line Ls ₁ and the second signal line Ls _2. Vs can be transmitted.

On the other hand, in the prohibited state, the transmission / reception circuits 11 and 12
The transmission signal Vs from the transmission processing device 31 can be transmitted only through the first signal line Ls ₁ to and from the gate device 34 because the transmission gate 13 and the return gate 14 block the transmission signal Vs. Gate device 3 for device 31
It is not transmitted to the second signal line Ls ₂ farther than 4. At this time, in the control circuit 10, the first signal line L
The transmission signal transmitting s ₁ is received through the transmission / reception circuit 11, and the transmission signal Vs having the same format as this transmission signal is generated. In the prohibited state, the transmission signal Vs generated by the control circuit 10 is sent to the second signal line Ls ₂ through the transmission gate 13 and the transmission / reception circuit 12.
On the other hand, the operation terminal device 3 connected to the second signal line Ls ₂
2 and the reply signal from the control terminal device 33 are transmitted to the control circuit 10
Is input to the first signal line Ls ₁ but is not output to the first signal line Ls ₁ . That is, the interrupt signal Vi is not returned to the transmission processing device 31, and the second signal line Ls is not returned.
_The operation of the switch SW of the operation terminal 32 connected to ₂ becomes invalid.

As described above, even if the second signal line Ls ₂ is not connected to the central control unit 31 in the prohibition state, the control circuit 10 outputs the second signal line Ls ₂ to the second signal line Ls ₂ . Since the transmission signal Vs is transmitted, the power can be supplied by the transmission signal Vs to the operation terminal device 32 and the control terminal device 33 connected to the _second signal line Ls ₂ . Further, the power supply circuit 16 is provided in the gate device 34 in order to supply power to the operation terminal device 32 and the control terminal device 33 by the transmission signal Vs sent from the gate device 34 to the second signal line Ls ₂ . The external power supply is stabilized and supplied to the control circuit 10. If the power supply capacity of the transmission processing device 31 has a margin, the power of the gate device 34 may be obtained by the transmission signal Vs from the transmission processing device 31. Further, in order to initialize the control circuit 10 when the power is turned on, the gate device 34 is also provided with a reset circuit 17. A short circuit detection circuit 18 is connected to the transmission / reception circuit 12 to which the second signal line Ls ₂ is connected, and the second signal line L
A short circuit between the lines of s ₂ is detected.

By the way, when the switch SW provided in the operation terminal 32 is operated, the interrupt signal Vi is generated and input to the control circuit 10 even when the gate device 34 is in the prohibited state. At this time, an interrupt flag is set in the operation terminal device 32, and the transmission processing device 31 waits for a search. Therefore, when the interrupt flag is set, the control circuit 10 generates the release mode transmission signal Vs so as to cancel the interrupt flag. The transmission signal Vs in the unlocked mode is sent to the searched operation terminal 32 after searching the operation terminal 32 that generated the interrupt signal Vi, as in the case where the transmission processing device 31 receives the interrupt signal Vi. Is transmitted to.

As described above, when the inhibition state is selected in the gate device 34, the second signal line L is selected.
By separating s ₂ from the first signal line Ls ₁ , the operation of the switch SW provided in the operation terminal device 32 connected to the _second signal line Ls ₂ is invalidated, and the second signal line L
switch S provided on the operation terminal 32 connected to s _2.
The interrupt flag set when W is operated is set to the release mode transmission signal V immediately after the generation of the interrupt signal Vi.
Since it is canceled by s, it is not necessary to cancel the interrupt flag when returning from the prohibited state to the permitted state. As a result, it is possible to immediately shift from the prohibited state to the permitted state by operating the switching operation terminal device 35.

The above operation is summarized as shown in FIG. That is, when the permission state is selected in the switching operation terminal 35, the normal transmission signal Vs is transmitted to the gate device 34 via the transmission processing device 31, and the inhibition / permission determination circuit 15 of the gate device 34 normally transmits. Transmission signal Vs
When it receives, the control circuit 10 is operated so as to select the permission state (S1). In the permitting state, the transmission / reception circuits 11 and 12 are connected via the transmission gate 13 and the reply gate 14, so that the first signal line Ls ₁ and the second signal line Ls _{2 are connected.}
And are connected (S2). When the first signal line Ls ₁ and the second signal line Ls ₂ are connected, the transmission signal Vs is transferred from the transmission / reception circuit 11 to the transmission / reception circuit 12 and sent to the _second signal line Ls ₂ . The control circuit 10 includes the transmission processing device 3
The transmission signal Vs from 1 is monitored (S3), and when the transmission signal Vs of one frame is completed, the transmission gate 13 and the reply gate 14 are switched to disconnect the transmission / reception circuits 11 and 12 (S4). In this way, by always disconnecting the first signal line Ls ₁ and the second signal line Ls ₂ ,
The transmission signal Vs for selecting the prohibited state is prevented from passing through the gate device 34.

In the permission state, the interrupt signal Vi is output from the operation terminal 32 connected to the _second signal line Ls _2.
When the interrupt signal Vi is received by the transmission / reception circuit 12 when the error occurs, the control circuit 10 causes the response gate 1 to return.
The two transmission / reception circuits 11 and 12 are connected via 4 and the interruption signal Vi is transferred from the transmission / reception circuit 12 to the transmission / reception circuit 11 to send the interruption signal Vi to the first signal line Ls ₁ .
When the transmission signal Vs is transmitted from the transmission processing device 31 in response to the interrupt signal Vi, the gate device 34 operates in the permission state as described above because the prohibition state is not selected, and the operation terminal 32 is used. It is possible to search for and control the control terminal 33.

On the other hand, when the prohibition state is selected by the switching operation terminal 35, the transmission signal Vs for selecting the prohibition state is transmitted to the gate device 34. Here, as described above, after the transmission of the transmission signal Vs of one frame, the transmission gate 13
Since the transmission / reception circuit 11 and 12 are separated from each other by the transmission / reception gate 14 and the transmission / reception circuit 14, the transmission gate 13 and the return gate 14 are kept in the conventional state. In the prohibited state, the second
The operation of the switch SW provided on the operation terminal 32 connected to the signal line Ls ₂ of the
_Since the display of ₁ and LD ₂ has no meaning, the gate device 3 transmits the transmission signal Vs in the all-off mode so that all the operation indicators LD ₁ and LD ₂ are turned off when the prohibited state is selected.
Then, the signal is sent from No. 4 to the second signal line Ls ₂ (S5). If the interrupt signal Vi is generated from the operation terminal 32 connected to the second signal line Ls ₂ in the prohibited state (S6),
By transmitting the transmission signal Vs in the release mode to the operation terminal 32 that has requested the interrupt (S7), the interrupt flag is released. On the other hand, if there is no interrupt signal Vi, the dummy mode transmission signal Vs similar to the dummy mode transmission signal Vs generated from the transmission processing device 31 is sent to the _second signal line Ls ₂ (S8).

(Embodiment 2) In this embodiment, a gate device 34 is used.
Further, as shown in FIG. 4, a display changeover switch SWd as a display changeover device is provided, and when the display changeover switch SWd is turned on, it is operated for operation when the gate device 34 is in a prohibited state. When the operation indicator lamps LD ₁ and LD ₂ provided in the terminal device 32 are turned on in the permitted state and the display changeover switch SW is turned off, all the operation terminal devices 32 are in the prohibited state. The operation indicators LD ₁ and LD ₂ provided in the above are turned off.

That is, the gate device 34 operates as shown in FIG. 5, and when the permission state is selected by the switching operation terminal 35, it operates similarly to the first embodiment. When the prohibition state is selected by the switching operation terminal 35, the operation changes according to the setting state of the display changeover switch SWd. That is, when the display changeover switch SWd is off (S11), the operation indicator lamps LD ₁ , LD
_Since it is required that all ₂ are turned off, the transmission signal Vs in the all-off mode is sent from the gate device 34 to the second signal line Ls ₂ (S5), and the interrupt signal Vs is transmitted.
When i is generated (S6), the transmission signal Vs in the release mode is transmitted to the operation terminal 32 that has requested the interruption (S7), and when there is no interruption signal Vi, the transmission signal Vs in the dummy mode is transmitted to the second terminal. The signal is sent to the signal line Ls ₂ (S8).

On the other hand, when the prohibited state is selected and the display changeover switch SWd is on (S11), the operation indicator lamps LD ₁ and LD ₂ are lit in the lighting state in the permitted state before the prohibited state is selected. Therefore, if the interrupt signal Vi is not generated from the operation terminal 32 connected to the _second signal line Ls ₂ (S12), the transmission gate 13 causes both the transmission / reception circuits 11, 12 is connected and the transmission / reception circuits 11 and 12 of the reply gate 14 are disconnected (S13). Therefore, the transmission signal Vs from the transmission processing device 31 is transmitted to the operation terminal 32 and displayed by the operation indicator lamps LD ₁ and LD ₂ . After the transmission signal Vs of one frame is transmitted, the transmission gate 13 causes the transmission / reception circuits 11 and 12 to operate.
Then, the gate device 34 waits for the next transmission signal Vs. Even if the display changeover switch SWd is on, the second
Since the interrupt signal Vi from the operation terminal 32 connected to the signal line Ls ₂ is invalidated, if the interrupt signal Vi is received (S12), the operation terminal 32 requesting the interrupt is notified. Release mode transmission signal Vs
Is transmitted to cancel the interrupt flag (S7). The other configurations and operations are the same as those in the first embodiment, and the description thereof will be omitted.

(Embodiment 3) This embodiment is an embodiment corresponding to the invention of claim 3, and as shown in FIG. 6, a lighting control device 36 is inserted in the signal line Ls, and a transmission monitoring device 31. The power source switching terminal 37 is connected to the first signal line Ls ₁ between the lighting control device 36 and the lighting control device 36, and is connected to the second signal line Ls ₂ farther than the lighting control device 36 with respect to the transmission monitoring device 31. The operation terminal 32 and the control terminal 33 are connected to each other. A lighting load is connected to the control terminal 33 as a load L.

The lighting control device 36 has the same configuration as the gate device 34 shown in the first embodiment, but as shown in FIG. 7, instead of the prohibition / permission determination circuit 15, a power failure / recovery determination circuit. 21 and the control circuit 10 is provided with a memory 22 as a storage unit. In addition, the power source for the entire remote monitoring and control system can be switched to the emergency power source when the regular power source fails.
As the emergency power supply, one having a smaller power supply capacity than that of the regular power supply is used. Therefore, at the time of power failure of the regular power supply, only a part of the load L is set to the thinned lighting state.

The power supply switching terminal 37 generates an interrupt signal Vi from the transmission processing device 31 when the power failure signal notifies the power failure of the regular power supply, and the transmission processor 31 transmits the transmission signal V in the power failure mode.
generate s. The power failure / recovery determination circuit 21 has an address similarly to the control terminal 33, and has a power switching terminal 37.
Is associated with. Therefore, the power switching terminal 3
When the power failure signal is input to 7 and the power failure of the regular power source is notified, the power failure / recovery determination circuit 21 causes the control circuit 10 to recognize that the regular power source has failed. In the control circuit 10, when a power failure is detected, the lighting state of the load L of the control terminal 33 connected to the _second signal line Ls ₂ at that time is stored in the memory 22, and then the predetermined load L Only the light is turned on, and the state shifts to the thinning lighting state. That is, the power consumption is suppressed by limiting the number of lights L to be turned on.
At this time, the transmission gate 13 and the reply gate 14 disconnect the two transmission / reception circuits 11 and 12 so that the operation of the switch SW provided in the operation terminal 32 is disabled.

On the other hand, when the utility power supply recovers from the power failure, the power failure recovery determination circuit 21 receives the recovery mode transmission signal Vs and returns the control signal to the normal lighting state. Here, since the memory 22 stores the lighting state of the load L before the power failure of the utility power supply, the content of the memory 22 is read to restore the lighting state of the load L to the previous lighting state when returning to the normal lighting state. Can be returned to the state. That is, the control circuit 10 functions as a return processing unit.

The operation will be described in more detail with reference to FIG. First, when a power failure signal is input to the power source switching terminal device 37 and the power source switching terminal device 37 is notified of a power failure, the power source switching terminal device 37 generates an interrupt signal Vi, and this interrupt signal V
In response to i, the transmission processing device 31 determines that the power failure / recovery determination circuit 2
1 transmits the transmission signal Vs in the power failure mode to the control circuit 10
Since the power failure state is recognized (S21), the control circuit 10 stores the lighting state of each load L at that time in the memory 22 (S22). Next, the control circuit 10 separates the transmission / reception circuits 11 and 12 by the transmission gate 13 and the reply gate 14 (S23), and transmits the transmission signal Vs from the control circuit 10 so that only the predetermined load L is turned on (S24). ). In this way, the thinned lighting state is achieved.

On the other hand, in the thinning-on state, when the power failure recovery signal is input to the power switching terminal 37 to notify the cancellation of the power failure, the power switching terminal 37 again generates the interrupt signal Vi, and this interrupt signal In response to Vi, the transmission processing device 31 transmits the recovery mode transmission signal Vs to the power failure / recovery determination circuit 21 and causes the control circuit 10 to recognize that the power failure is recovered (S25). Therefore, the control circuit 1
0 reads the previous lighting state of the load L from the memory 22 and restores the lighting state of each load L (S26), and then connects both transmission / reception circuits 11 and 12 via the transmission gate 13 and the reply gate 14. (S27), the first signal line Ls ₁ and the second signal line Ls ₂ are connected.

In the above embodiment, the lighting control device 36
Although the load L is decimated and lit by the transmission control device 31, the transmission control device 31 illuminates only the predetermined load L after the lighting control device 36 stores the previous lighting state of the load L in the memory 22 at the time of power failure of the regular power supply. You may do it. In this case, the lighting control device 36 does not require the transmission gate 13 and the reply gate 14.

[0041]

According to the invention of claim 1, a gate device is provided on a signal line, and an interrupt signal from a terminal connected to a signal line farther than the gate device with respect to the transmission processing device is transmitted to the transmission processing device. When the gate device is set to the inhibit state, the interrupt signal is received and an interrupt is requested when the gate device is set to the inhibit state. A transmission signal for canceling the interrupt request is sent to the existing terminal device, and when the interrupt signal is generated from the terminal device in the disabled state, the transmission signal is generated from the gate device and the interrupt request is immediately canceled. Therefore, the operation of canceling the interrupt request is not required when shifting from the prohibited state to the permitted state, and as a result, immediately after shifting from the prohibited state to the permitted state. There is an advantage that the operation of the switch is enabled.

According to the second aspect of the present invention, the terminal device provided with the switch is provided with the operation indicator lamp for displaying the control state of the load, and the gate device is provided with the display switching device, whereby the gate device is set to the prohibited state. When the power is on, the operation indicator lights of all terminals connected to the signal line farther than the gate device to the transmission processing device are all extinguished, and the permission state before being set to the prohibited state Since it is possible to switch to the display state in which the operation indicator light is turned on so that it becomes the lighting state in, the display state if it is necessary to know the lighting state in the permission state before being set to the prohibited state If it is not necessary to turn on the operation indicator because the switch operation is invalid in the prohibited state, select the all-off state to disable the switch operation. There is an advantage that can indicate.

According to a third aspect of the present invention, there is provided a lighting control device provided on a signal line, and a lighting load provided as a load to a terminal device connected to a signal line farther than the lighting control device with respect to the transmission processing device. The lighting control device is configured to selectively switch between a thinned lighting state in which only a predetermined part is lit and a normal lighting state in which lighting is performed according to a switch operation. The lighting state before the lighting load is set to the thinning lighting state based on the data stored in the storage unit by the restoration processing unit when the data related to the lighting state of the Light up with
Also, when the power supply is switched from the emergency power supply, which has a smaller power supply capacity than the regular power supply, the power supply switching terminal unit causes the lighting control device to switch from the normal lighting state to the thinning lighting state. When becomes smaller, there is an advantage that the thinned lighting state is selected and power consumption is suppressed. Moreover, the lighting state of each lighting load in the normal lighting state before the transition to the thinning lighting state is stored in the storage unit, and when the thinning lighting state is returned to the normal lighting state, the lighting state stored in the storage unit is restored. After the recovery from the power failure, there is an advantage that the lighting load can be returned to the original lighting state.

[Brief description of drawings]

FIG. 1 is a block diagram showing a first embodiment.

FIG. 2 is a block diagram showing a gate device used in the first embodiment.

FIG. 3 is an operation explanatory diagram of the gate device used in the first embodiment.

FIG. 4 is a block diagram showing a gate device used in a second embodiment.

FIG. 5 is an operation explanatory diagram of the gate device used in the second embodiment.

FIG. 6 is a block diagram showing a third embodiment.

FIG. 7 is a block diagram showing a lighting control device used in a third embodiment.

FIG. 8 is an operation explanatory diagram of a lighting control device used in a third embodiment.

FIG. 9 is a schematic configuration diagram of a remote monitoring control system.

FIG. 10 is an operation explanatory diagram illustrating a transmission signal used in the remote monitoring control system.

[Explanation of symbols]

22 memory 31 transmission processing device 32 operation terminal device 33 control terminal device 34 gate device 35 switching operation terminal device 36 lighting control device 37 power supply switching terminal device L load LD ₁ operation indicator lamp LD ₂ operation indicator lamp Ls signal line Ls ₁ First signal line Ls ₂ Second signal line SW switch SWd Display changeover switch

Claims (3)

[Claims] 1. A plurality of terminals each having an address separately are connected to a transmission processing device by a time division multiplex connection method via a two-wire signal line, and the transmission processing device transmits a transmission signal including address data. The terminal device is individually accessed by transmitting to the signal line, and the interrupt signal generated in synchronization with the transmission signal in response to the operation of the switch provided in the terminal device is received,
A terminal device requesting an interrupt is searched for, control data is generated and transmitted to another terminal device whose correspondence relationship with the searched terminal device is preset, and the device is connected to that terminal device. In a remote monitoring control device that controls a load according to control data, an interruption from a terminal device inserted at a predetermined position on a signal line and connected to a signal line farther than the predetermined position with respect to the transmission processing device from the terminal device to the transmission processing device A gate device that selectively switches between a permitting state for permitting signal transmission and a prohibiting state for inhibiting transmission, and a permitting state and a inhibiting state of the gate device connected to a signal line between the transmission processing device and the gate device. When a gate device receives an interrupt signal from the terminal device in the prohibition state, it is interrupted to the terminal device requesting the interrupt. Remote monitoring and control system characterized by sending a transmission signal to cancel the request. 2. Each terminal equipped with a switch is provided with an operation indicator lamp for displaying a control state of a load corresponding to the operation of the switch, and the gate device is provided to the transmission processing device when the prohibition state is set. All lights off the operation indicator lights of all terminals connected to the signal line farther from the gate device, and each connected to the signal line farther to the transmission processing device than the gate device. The display switching device for selectively switching between a display state in which the operation indicator lamp of the terminal device is turned on so as to correspond to the control state of the load before being set to the prohibited state is provided. Remote monitoring control system. 3. A plurality of terminals each having an address separately are connected to a transmission processing device by a time division multiplex connection method via a two-wire signal line, and the transmission processing device transmits a transmission signal including address data. The terminal device is individually accessed by transmitting to the signal line, and the interrupt signal generated in synchronization with the transmission signal in response to the operation of the switch provided in the terminal device is received,
A terminal device requesting an interrupt is searched for, control data is generated and transmitted to another terminal device whose correspondence relationship with the searched terminal device is preset, and the device is connected to that terminal device. In a remote monitoring control device for controlling a load according to control data, a lighting load provided as a load to a terminal device inserted at a predetermined position on a signal line and connected to a signal line farther than the predetermined position with respect to a transmission processing device. Lighting control device that selectively switches between the thinning lighting state in which only the prescribed lighting load is turned on and the normal lighting state in which each lighting load is turned on according to the switch operation, and the transmission processing device and lighting When the power supply is switched to the emergency power supply that is connected to the signal line with the control device and has a smaller power supply capacity than the regular power supply, the lighting control device is thinned from the normal lighting state. The lighting control device is provided with a power supply switching terminal for switching to the lighting state, and the lighting control device shifts from the thinning lighting state to the normal lighting state with a storage unit that stores data regarding the lighting state of each lighting load before being set to the thinning lighting state. The remote monitoring control system according to claim 1, further comprising: a return processing unit that lights the lighting load in a lighting state before being set to the thinning lighting state based on the data stored in the storage unit.