JP2975137B2 - Remote monitoring and control system - Google Patents

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 system using time division multiplex transmission.

[0002]

2. Description of the Related Art Conventionally, in this type of remote monitoring control system, based on monitoring data from a monitoring terminal device in response to operation of an operation switch for group operation, the monitoring terminal device has a subordinate relationship with the monitoring terminal device in advance. The control data is transmitted from the central control device to a plurality of set control terminals by a transmission signal, and group control for simultaneously controlling loads such as lighting corresponding to each control terminal can be performed. I have. At this time, the state of each load to be controlled by the group was displayed on a display element made of a light emitting diode provided in a monitoring terminal for group operation.

In the case of this conventional example, the display control mode of the display element is fixedly set in the central control device in advance, and the central control device sets the display control mode and the load of the control terminal to be subjected to group control. By comparing the states, for example, when all the loads belonging to the control terminal to be controlled by the group control are in the ON state, the display element for ON display is turned on, and when all the loads to be controlled are in the OFF state. The display element is turned off, and one of the loads belonging to the control terminal to be controlled by the group is turned off or on by an individual operation, and the operation switch of the group control is operated when both on and off are mixed. The display state at the time when the operation switch is operated is maintained even when the control terminal targeted for group control is not connected to the system. It is had.

[0004]

In the fixed display control mode as described above, a display control mode mainly based on an operation after the system is constructed, a display control mode mainly based on a load state, or the like. There was a problem that it was difficult to change the specifications, and that quick response was not possible.

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and has as its object to provide a remote monitoring control system capable of easily changing a control mode for displaying a load state in group control. .

[0006]

In order to achieve the above-mentioned object, according to the first aspect of the present invention, a central control unit and a plurality of monitoring and control terminals each having a unique address are set as a pair. Connected by a signal line, a central control unit appropriately accesses each terminal device to transmit a control data signal for controlling the load and a transmission signal for transmitting a reply standby signal for setting a reply signal period, and the reply signal period. to by sending a return signal consisting of a current-mode signal obtained between the signal lines are short-circuited through a suitable impedance-based on the monitoring data from the terminal device, time division multiplexing control data and monitor data a remote monitoring and control system which is adapted
Based on the monitoring data from the monitoring terminal corresponding to the operation of the operation switch, the central control unit transmits a transmission signal from the central control unit to a plurality of control terminals that are set in a subordinate relationship to the monitoring terminal in advance. In response to group control, which simultaneously controls the load corresponding to each control terminal by transmitting control data, and the content of the display control mode of the display element provided in the monitoring terminal corresponding to the operation switch The central control unit is provided with a memory for writing externally rewritable externally, and a display control data signal of a display element corresponding to a state of a load to be controlled by a group is transmitted by a transmission signal based on the contents of a display control mode written in the memory. The monitoring terminal that transmits the display control data from the central control device to the monitoring terminal corresponding to the operation switch controls the display element.

According to a second aspect of the present invention, the central control unit is provided with a dedicated communication unit for receiving data of the display control mode from outside. The invention according to claim 3 further comprises means for inputting data of a display control mode as a reply signal,
A display control mode setting terminal for returning data input by the means to the central control device is connected to a signal line.

According to a fourth aspect of the present invention, a monitoring terminal provided with an operation switch is provided with input means for setting data in a display control mode, and the data set by the input means is sent as a reply signal to the central control unit. I will reply.

[0009]

According to the present invention, a plurality of monitoring terminals set in advance to the monitoring terminal based on monitoring data from the monitoring terminal in response to the operation of the operation switch. The control terminal transmits control data by a transmission signal from the central control unit to control the load corresponding to each control terminal at the same time. The control terminal corresponds to the group control, and the monitoring terminal corresponds to the operation switch. Since the central control device has a memory in which the contents of the display control mode of the display element provided in the central control device are rewritable from the outside, by sending the data of the display control mode to be written in the memory provided in the central control device from the outside, The display control mode can be changed freely, so that the display control mode focusing on operation and the display control mode focusing on monitoring can be set freely after system construction. Specification changes can be performed quickly.

According to the second aspect of the present invention, since the central control device is provided with a dedicated communication means for receiving the data of the display control mode from the outside, the display control mode is controlled by using an external device such as a personal computer. Can be changed. According to the third aspect of the present invention, there is provided a means for inputting display control mode data as a reply signal, and a display control mode setting terminal for returning data input by the means to the central control device is connected to the signal line. Because
The display control mode can be changed using the display control setting terminal, and the setting of the display control mode for each group can be easily changed by associating the address of the display setting terminal with the group.

Further, according to a fourth aspect of the present invention, a monitoring terminal provided with an operation switch is provided with input means for setting data in a display control mode, and the data set by the input means is used as a reply signal as a central control unit. Therefore, when the display control mode of the group to be operated by the operation switch is changed, it can be easily associated.

[0012]

The present invention will be described below with reference to examples. FIG. 2 shows an embodiment system in which a central control unit 1 and a plurality of monitoring and control terminals 2, 2 ′ and 3 set with a unique address are connected to a pair of signal lines 4. Connected.

As shown in FIG. 3A, the transmission signal Vs transmitted from the central controller 1 to the signal line 4 includes a start pulse signal ST indicating the start of signal transmission, mode data MD indicating a signal mode, and a terminal. Address data signal AD for calling 2, 2 'and 3, control data signal C for controlling load L
D, a baseband multipole (± 24 V) time division multiplexed signal comprising a checksum data signal CS and a reply standby signal WT for setting a reply signal period. Data is transmitted by pulse width modulation. ing. Each of the terminals 2, 2 ', 3 captures the control data of the transmission signal Vs when the address data of the transmission signal Vs received via the signal line 4 matches, and also transmits the transmission signal Vs
The monitor data signal is returned as a return signal in a current mode (a signal transmitted by short-circuiting the signal lines 4 via a suitable low impedance) in synchronization with the return standby signal WT.

The central control unit 1 receives a dummy signal transmitting means for constantly transmitting a dummy transmission signal Vs and an interrupt signal Vi as shown in FIG. An interrupt processing means for detecting the interrupt generating terminal 2 when it is received, accessing the terminal 2 and returning the monitoring data is provided, while the monitoring terminal 2 is operated by operating the operation switch SW or the like. When there is a monitoring input, an interrupt signal Vi is generated in synchronization with the start pulse signal ST of the dummy transmission signal Vs, and in synchronization with the reply waiting signal WT of the transmission signal Vs in the address confirmation mode from the central control device 1. An interrupt generating means for returning its own unique address data, and a transmission signal Vs of an interrupt access mode in response to the interrupt from the central control unit 1. A data return means for returning the monitoring data corresponding to the monitoring input is provided when the.

As described above, the central controller 1 controls the load L such as the corresponding lighting load based on the monitoring data returned from the monitoring terminals 2 and 2 'to the central controller 1 as described above. Control data to be transmitted to the control terminal 3 is created, and the load L is controlled by time-division multiplex transmission of the control data to the control terminal 3 via the signal line 4.

Here, as shown in FIG. 1, the central control unit 1 includes a signal transmission circuit 5 for transmitting a transmission signal Vs, a return signal receiving circuit 6 for receiving a return signal, a communication circuit 7 such as RS232C, Vs data creation processing, return signal monitoring data discrimination processing, and communication processing when exchanging data with an external device 13 such as an external personal computer through the communication circuit 7. CPU unit 10 for controlling writing and reading
And the above-mentioned memories 8 and 9 and a power supply unit 11.
The memory 8 is a rewritable memory and stores a group control table. The memory 9 is also a rewritable memory and stores a display control mode corresponding to the group control for each set control group.

On the other hand, as shown in FIG. 4, the control terminal 3 rectifies and smoothes the transmission signal Vs to obtain a circuit power.
An address setting unit 31 for setting a unique address;
A signal processing unit 32 having a function of receiving the transmission signal Vs and taking in the control data signal CD when the address data of the address data signal AD matches the set address and creating a control signal of the load L from the control data; And a control unit 33 for turning on / off the load L by a control signal.

As shown in FIG. 5, the monitoring terminals 2, 2 'are a power supply section 20 for obtaining a circuit power by rectifying and smoothing the transmission signal Vs, and an address setting section 2 for setting a unique address.
1, an operation switch SW, and an operation signal of the operation switch SW. The operation data of the operation switch SW is received to generate monitoring data. When the transmission signal Vs is received and the address data of the address data signal AD matches the set address, the control data signal is output. A signal processing unit 22 having a function of generating a control signal for load operation display using a control data by taking in a CD, a display control unit 23 having a function of turning on / off a display element 24 by a control signal, A return signal creation unit 25 for creating a return signal in the current mode based on the monitoring data.

Here, the control terminal 3 can control the four loads L at the same address, and the monitoring terminal 2 can take in the operation signals of the four operation switches SW at the same address. The central control device 1 limits the bits of the address that can be set among the unique addresses, and determines that the control terminal 3 and the monitoring terminal 2 that share this bit setting are in a correspondence relationship for individual operation. You can set the table on the side.

In the individual operation, if the operation switch SW of the monitoring terminal device 2 for the individual operation is operated, the central control device 1 returns the monitoring terminal device returned through the above-described interrupt processing. The control terminal 3 which has a correspondence through the above signal processing process based on the monitoring data from the control terminal 3
The control data is transmitted by the transmission signal Vs, and the load L is turned on or off.

This state can be displayed on the monitoring terminal 2 by transmitting control data for turning on / off the display element 24 from the central control unit 1 as a transmission signal Vs. In the display. Here, in addition to the individual operation, group control for simultaneously turning on / off the loads L of the control terminals 3 grouped in advance for each group is possible, and a monitoring terminal 2 'for control corresponding to the group is provided. ing.

That is, a relational table between the control terminal 3 for performing group control on the central controller 1 and the corresponding monitoring terminal 2 'is written in the memory 8 and set in advance. If the operation switch 2 'is operated, the control data is sent to the control terminals 3 of the corresponding group to turn on / off the respective loads L.

Further, the monitoring terminal 2 'is provided with a display element 24 for displaying according to the load state of the group. The display element 24 is turned on / off based on control data of the transmission signal Vs from the central control unit 1. It can be turned off. Here, the display control mode of the display element 24 can be written in the memory 9 of the central control unit 1. In the central control unit 1, the CPU unit 10 stores the content of the display control mode and the control state of the load L belonging to the group. Judge,
Control data for display is created.

The contents of the display control mode include an operation priority mode and a status (monitoring) priority mode. The same display control mode can be set for all the groups, or for each group. The display control mode can be written in the memory 9 in the embodiment by exchanging data with an external device 13 such as a personal computer through the communication circuit 7.

The operation switch S of the monitoring terminal 2 '
When W is operated, the central control device 1 sequentially accesses the corresponding control terminals 3 to be controlled by the group based on the monitoring data sent through the above-described interrupt processing, and The control data is sent so that the load L is turned on or off, and the load L is turned on (turned on) or turned off (turned off) all at once.

The central control unit 1 sends the control terminal 3 corresponding to the operated monitoring terminal 2 ′ the state of the load L of the corresponding pattern control target and the display control mode written in the memory 9. The control data is created in accordance with the content of the monitoring terminal 2 and transmitted to the monitoring terminal 2 ′, and the display element 24 is turned on /
Turn off. Here, as the display control mode for all groups, control data for turning off the display element 24 when all the loads L belonging to the group are turned off, and any one of the loads L belonging to the group by an individual operation or the like. Is transmitted, the control data for turning on the display element 24 is transmitted. When the control terminal 3 of the address belonging to the group is not connected and does not exist, the control data for turning on the display element 24 is transmitted. There is a mode to do.

As the operation priority, control data for turning off the display element 24 when all the loads L belonging to the group are turned off, and all the loads L belonging to the group are turned off.
Is in the ON state, control data for turning on the display element 24 is transmitted.
There is a mode in which the display at the time of the operation is maintained. As the state priority, there is a mode in which control data for turning on the display element 24 is transmitted when any of the loads L belonging to the group is in the ON state, and control data for turning off the light is transmitted in other cases.

By appropriately setting these modes for each group, the display specifications can be changed for each group.
In the above embodiment, the data in the display control mode is stored in the communication circuit 7.
Can be provided to the central control device 1 by an external device using a personal computer. As shown in FIG. 2, a dedicated terminal device 11 is provided, and data of the display control mode is input by an input means provided in the terminal device 11. Alternatively, the selection code is sent to the central controller 1
The setting may be changed by returning a response signal to the monitoring terminal 2 ′. The monitoring terminal 2 ′ is provided with an operation switch SW ′ for setting the display control mode, and by operating the operation switch SW ′, the monitoring is performed. The data of the display control mode of the group to which the terminal device 2 ′ belongs may be sent to the central control device 1.

In the case of the dedicated terminal 11, the setting of the display control mode can be changed for the group in the area corresponding to the area where the load L to be controlled is installed. good. The display element 24 displays on / off of the load L by turning on / off the light. However, it is needless to say that the display element 24 may be turned on and off by using the display element 24 for off and on.

[0030]

According to the present invention, a plurality of control terminals set in advance in a dependent relationship with respect to the monitoring terminal based on monitoring data from the monitoring terminal according to the operation of the operation switch. The control data is transmitted from the central control unit by a transmission signal, and the load corresponding to each control terminal is controlled at the same time corresponding to group control, and the display provided on the monitoring terminal corresponding to the operation switch Since the central control unit has a memory to write the contents of the display control mode of the element in an externally rewritable manner, the display control mode can be freely controlled by externally sending the display control mode data to be written to the memory provided in the central control unit. The mode can be changed, so that the display control mode that emphasizes operation and the display control mode that emphasizes monitoring can be set freely after system construction. There is an effect that can be performed quickly.

According to the second aspect of the present invention, since the central control unit is provided with a dedicated communication means for receiving the data of the display control mode from the outside, the display control mode of the display control mode is controlled by using an external device such as a personal computer. There is an effect that a change can be made. The invention according to claim 3 further comprises means for inputting display control mode data as a reply signal, and a display control mode setting terminal for returning the data input by the means to the central control device is connected to the signal line. Therefore, the display control mode can be changed using the display control setting terminal, and the display control mode setting for each group can be changed by associating the address of the display setting terminal with the group. This has the effect of being easier.

Further, according to a fourth aspect of the present invention, a monitoring terminal provided with an operation switch is provided with input means for setting data in a display control mode, and the data set by the input means is used as a reply signal as a central control unit. Therefore, when the display control mode of the group to be operated by the operation switch is changed, it can be easily associated with the change.

[Brief description of the drawings]

FIG. 1 is a circuit block diagram of a central control device according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of the entire system.

FIG. 3 is an explanatory diagram of a transmission signal.

FIG. 4 is a circuit block diagram of the control terminal of FIG. 1;

FIG. 5 is a circuit block diagram of the monitoring terminal of FIG. 1;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Central controller 5 Signal transmission circuit 6 Reply signal receiving circuit 7 Communication circuit 8 Memory 9 Memory 10 CPU unit 13 External device

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-61-271784 (JP, A) JP-A-63-209394 (JP, A) JP-A-1-190199 (JP, A) JP-A-56-209 52992 (JP, A) JP-A-61-271785 (JP, A) JP-A-1-114194 (JP, A) JP-A-2-108493 (JP, U) JP-A-63-142932 (JP, U) (58) Field surveyed (Int. Cl. ⁶ , DB name) H04Q 9/00-9/16

Claims (4)

(57) [Claims] 1. A central control unit is connected to a plurality of monitoring and control terminals to which a unique address is set by a pair of signal lines, and each terminal is accessed from the central control unit as appropriate to load. It sends out a transmission signal for transmitting a reply wait signal for setting the control data signal and the reply signal period to control, via a suitable impedance-between signal lines on the basis of the monitoring data from the terminal unit to said reply signal period by sending a reply signal consisting of a current-mode signal obtained by shorting Te, a remote monitoring and control system adapted to time-division multiplex transmission of control data and monitor data, for monitoring in accordance with the operation of the operation switch Based on the monitoring data from the terminal, control data is transmitted from the central control unit to a plurality of control terminals that are set in advance in a dependent relationship with the monitoring terminal by a transmission signal. By transmitting a data corresponding to the group control for controlling simultaneously the corresponding load to the control terminal unit each,
The central control unit is provided with a memory in which the contents of the display control mode of the display element provided in the monitoring terminal corresponding to the operation switch are rewritably rewritable from the outside, based on the contents of the display control mode written in the memory. The display control data signal of the display element according to the state of the load to be controlled by the group is transmitted from the central control device to the monitoring terminal corresponding to the operation switch by a transmission signal, and the monitoring terminal receiving the display control data is A remote monitoring control system for controlling a display element. 2. The remote monitoring and control system according to claim 1, wherein the central control unit is provided with a dedicated communication means for receiving display control mode data from outside. 3. A display control mode setting terminal for returning display control mode data to the central control unit as a reply signal, the display control mode setting terminal being connected to the signal line. The remote monitoring and control system according to claim 1, wherein 4. A monitoring terminal provided with an operation switch is provided with an input means for setting data of a display control mode, and the data set by the input means is returned to the central control device as a return signal. 2. The remote monitoring and control system according to claim 1, wherein: