JP2768999B2 - Lighting control system - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a lighting control system, and more particularly to a lighting control system for centrally monitoring and controlling one or more lighting loads.

[Conventional technology]

FIG. 4 is a block diagram showing a load control system disclosed in Japanese Patent Application No. 1-108080 (hereinafter referred to as a conventional example).
In FIG. 4, reference numeral 1 denotes a power line, 2 denotes a lighting load connected to the power line 1, 3 denotes a terminal for controlling the lighting load 2 to blink by a switch such as a relay contact, and 4 denotes a signal to the terminal 3. It is a central control unit that sends out a control signal of the lighting load via the transmission line 5. Reference numeral 8 denotes a gateway device provided corresponding to the power line 1 for converting a load control signal transmitted from the central control device 4 via the signal transmission line 5 into a transmission signal for power line carrier communication and transmitting the signal onto the power line 1. is there. Note that an address is individually set for each terminal device 3 and each gateway device 8.

 Next, the operation of the conventional example will be described with reference to FIG.

In order to control the terminal 3 in the conventional load control system shown in FIG. 4 as described above, first, a control signal is transmitted from the central control unit 4 to the signal transmission line 5. Each gateway device 8 constantly monitors a transmission signal on the signal transmission line 5, and when the gateway address of the transmission signal indicates its own address, takes in the signal.
The control signal is converted into a control signal for each terminal 3 based on the control signal, and the control signal is transmitted to the power line 1.

Each terminal 3 always monitors the transmission signal on the power line 1, and when the terminal address of the transmission signal indicates its own address, takes in the signal and determines a predetermined value based on the content indicated by the control data. Is performed.

The gateway device 8 can store what kind of control signal should be transmitted when the power of the terminal device 3 connected to the power line 1 is turned on. Even if the control signal is not transmitted for some reason, the terminal device 3 can be controlled to a predetermined state.

[Problems to be solved by the invention]

As described above, in the conventional example, at the time of recovery from a power failure,
The lighting load is controlled by a control signal from the gateway device. However, in light control, the output state of the terminal is generally set to ON until the control signal comes, considering the case where the control signal cannot be transmitted.
For this reason, if the control device breaks down, there is a problem that the generator may be overloaded if private power generation or the like is used.

The present invention has been made in order to solve the problems of the conventional example as described above, by turning off the control output for the lighting load of the terminal control at the time of power-on, and for self-generation at the time of power-on. In order to prevent overload, furthermore, output control means is provided in the terminal control means, and when a control signal does not come within a predetermined time, the lighting load is manually controlled, for example, to ensure safety. Aim.

[Means for solving the problem]

Therefore, the present invention provides a lighting control system including one or more terminal control means for controlling a lighting load connected to a power line, and a central control means for communicating with the terminal control means and controlling the lighting load. The terminal control means has output switching means when remote control is not possible, and
The control output for the lighting load at the time of turning on the power is turned off, and when the control signal from the central control means does not come within a predetermined time, the setting of the output switching means is read and the setting state is output to the lighting load. An object of the present invention is to achieve the above object by a lighting control system having a control means for controlling the lighting.

[Action]

In the lighting control system according to the present invention, one or a plurality of terminal control means controls a lighting load connected to a power line, and a central control means communicates with the terminal control means to control the lighting load.

In addition, the terminal control means having output switching means when remote control is disabled, turns off the control output for the lighting load when the power is turned on.
If the control signal is not received from the central control means within a predetermined time, the setting of the output switching means is read, and control is performed so as to output the setting state to the lighting load.

〔Example〕

 An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 is a block diagram showing a lighting control system according to an embodiment of the present invention, FIG. 2 is a flowchart for controlling the operation at the time of power recovery of this embodiment, and FIG. 3 is a communication sequence diagram of FIG.

In FIGS. 1 to 3, the same or corresponding components as those in the conventional example are denoted by the same reference numerals, and redundant description will be omitted.

In FIG. 1, A is a terminal control means,
This is a means for controlling the lighting load 2 connected to the power line, comprising the terminal device 6 and the output switching means C. As described above, the terminal control means A has an output switching means C (described later) when remote control is not possible, and a power supply (not shown).
The control output for the lighting load 2 at the time of turning on is turned off, and when a control signal from a central control means B (described later) does not come within a predetermined time, the setting of the output switching means C is read and the setting state is changed to the lighting load. 2 is a means having control means D (described later in detail) for controlling the output to 2. The central control means B is a means for communicating with the terminal control means A to control the lighting load 2, and is constituted by a central control device 4. The output switching means C comprises output switching switches 7 and switches output when remote control is not possible.

Next, the operation of this embodiment when the power is turned on will be described with reference to FIGS. 1 to 3, focusing on the control means D built in the terminal control means A.

In the flowchart of FIG. 2, when the power is turned on (step 2a), the relay output of the terminal 6 is turned off (step 2b). Since the operation of the CPU 9 is very fast compared to the time required for the operation of the coil of the relay, the output to the lighting load 2 can be turned off without turning on the relay. Next, a signal on the transmission line 1 is monitored, and a control signal for the own terminal 6 is monitored. When a control signal is received, predetermined control is started based on the control signal (step 2c).

If no control signal comes in 5 seconds (step 2d) (N),
The output switch 7 is read (step 2e), and a control signal is output to the relay based on the state of the output switch 7 (step 2f). Thereafter, the signal on the transmission line is monitored (step 2g), and when a control signal for the own terminal 6 comes (step 2h) (Y), predetermined control (step 2i) can be performed.

Next, a communication sequence at the time of recovery from a power failure in this embodiment will be described with reference to FIG.

First, when power is restored from a power failure, the terminal device 6 outputs a control signal of OFF to the lighting load 2 (dotted line in the figure), and turns off the control output for the lighting load when the power is turned on. The central control device 4 transmits a control signal (for example, a signal for returning to the output state of each terminal device before the power failure) to the gateway device 8, and the gateway device 8 converts the signal into a control signal for the terminal device 6, It transmits to the terminal device 6. The terminal device 6
When the control signal is sent, the lighting load 2 is controlled based on the content of the control signal.

As described above, according to this embodiment, the control output for the lighting load at the time of turning on the power of the terminal device is turned off, so that the power generator and the like are not overloaded when the power is turned on. Also, even in the event that control from the control device is not possible, the terminal can control the lighting load at hand by setting the output changeover switch when no control signal is received within a predetermined time.

〔The invention's effect〕

As described above, according to the present invention, it is possible to turn off the control output to the lighting means of the terminal control means at the time of turning on the power, and to prevent overloading the private power generation or the like at the time of turning on the power. An output switching means is provided in the terminal control means, and when a control signal does not come within a predetermined time, there is an effect that a lighting control system capable of manually controlling a lighting load and ensuring safety can be obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram of a lighting control system showing one embodiment of the present invention, FIG. 2 is a flowchart showing a process at the time of power restoration of this embodiment, and FIG. 3 is an energizing sequence at the time of power restoration of this embodiment. FIG. 4 is a configuration diagram showing a configuration of a conventional example. A: Terminal control means B: Central control means C: Output switching means D: Control means Y: Lighting control system 1: Power line 2: Lighting load 6: Terminal device 7: Output switching switch In each figure, the same reference numerals indicate the same or corresponding parts.

Claims (1)

(57) [Claims] 1. A control system for controlling a lighting load connected to a power line.
Or a plurality of terminal control means, and a lighting control system having a central control means for communicating with the terminal control means and controlling a lighting load, wherein the terminal control means has an output switching means when remote control is impossible. And, when the control output for the lighting load at the time of turning on the power is turned off, if the control signal from the central control means does not come within a predetermined time, the setting of the output switching means is read, and the setting state is set to the lighting. An illumination control system, comprising: a control unit that controls output to a load.