JPS6233602B2 - - Google Patents

Description

[Detailed Description of the Invention] This invention is a load in which a plurality of loads are connected to each terminal device having a unique address, and these terminal devices are connected to a central control unit via a common transmission line. The present invention relates to a load control device that controls a load via a terminal device according to a preprogrammed pattern control program.

BACKGROUND ART Recently, various attempts have been made to conserve energy as energy prices have soared, including the idea of automating the control of lighting to eliminate unnecessary lighting.

To achieve this, it was necessary to precisely control the lighting load, which inevitably made the wiring work complicated and the control equipment large-scale, making it difficult to realize.

Conventionally, in order to solve the above-mentioned problem, as shown in FIG. Each of the terminals 3 and 4 has a plurality of loads (four in the illustrated example), for example, lighting equipment 5a.
5d, 6a to 6d, and the central control device 1
The lighting patterns 5a to 5d, 6a to 6d are stored in advance according to a time schedule, and read out according to the time limit data and transmitted to each terminal device 3, 4 via the transmission line 2.
At the same time, the above-mentioned lighting pattern is changed based on the data from the optical sensor 8 according to the degree of daylight to control lighting fixtures 5a to 5d and 6a to 6d, for example, those near windows. In other words, in such a device, the temporal change in the lighting pattern of a certain area can be illustrated as shown in FIG. 2, for example. That is, in the example shown in FIG. 2, the time period is divided into six time periods _T1 to _T6 , and the lighting pattern changes for each time period. Here, T ₁ is before work, T ₂ and T ₄ are during work, T ₃ is lunch break, T ₅ is after work, and T ₆ is night time. In this case, the lighting pattern is changed according to the data from the optical sensor mentioned above during the time periods T ₂ , T ₃ , and T ₄ .
The number of devices that are turned on may change. Furthermore, as shown in FIG. 1, for example, if a switch panel 7 with built-in hand switches 7a to 7d is connected to the terminal device 3, the appliances can be independently controlled by operating the hand switches during the time period _T1 to _T6 . You can also do it.

However, in such a device, when a hand switch is provided as described above, there are the following disadvantages. In other words, if the lighting pattern data for a lighting fixture and the hand switch data for this fixture are different, which one should be prioritized? Conventionally, it has been common to adopt a system that gives priority to off. That is, if either one is off, the control signal is turned off.

Therefore, if this is done, an appliance that has been turned off based on the lighting pattern data cannot be turned on using the handheld switch, whereas an appliance that has been turned on based on the lighting pattern data can be turned off using the handheld switch.

However, if you actually want to turn on appliances only in a certain range at night after work due to overtime, etc., you have to write the night lighting pattern each time, which is extremely troublesome. It is extremely inconvenient to have to return it to . For this reason, with timed lighting pattern control, it is not possible to adopt a lighting pattern that turns off almost all the appliances like the nighttime pattern, so it is now possible to use the same lighting pattern after work as during work and leave on/off to the local switch. This type of lighting pattern control has the disadvantage of being difficult to utilize.

In contrast, the applicant has recently proposed a device with a temporary function added (Japanese Patent Application No. 1983).
- No. 72665).

This device is equipped with a temporary switch instead of a hand switch, and this switch changes the lighting pattern to another temporary lighting pattern for a preset period of time, and when the preset period of time has elapsed, the light turns on normally. This is to return to the pattern.

FIG. 3 shows an example of a change in lighting pattern obtained by such a load control device. The hatched portion in the figure is the temporary lighting pattern changed by the temporary switch, and the rest is the same as in FIG. 2.
Here, when the temporary switch is operated at time _t1 , the lighting pattern changes from the regular lighting pattern at time _T5 so that only the fixtures assigned to the temporary switch are turned on. This temporary lighting pattern continues until _a preset time elapses, that is, until time _t2 , at which point the lighting pattern returns to the regular lighting pattern at _T6 . If the temporary switch is operated again at time _t3 , the lighting pattern changes again to the temporary lighting pattern, but if the temporary switch is operated again at time _t4 without passing the set time _t5 , the lighting pattern immediately returns to the regular lighting pattern.

Therefore, in this way, the lighting pattern of only the necessary appliances can be changed with a simple switch operation, which is convenient for use, and it is also advantageous from the point of view of power saving, since unnecessary appliances can be effectively stopped. It is.

However, according to such a device, when the temporary lighting pattern returns to the regular lighting pattern at time _t2 shown in Fig. 3, the lighting pattern suddenly returns without any warning, so the appliance that is turned on in the temporary lighting pattern may suddenly turn on. It will be turned off.
This not only causes discomfort to people working under the illumination of the equipment, but also may pose a danger to the work.

The present invention has been made to eliminate such inconveniences, and by operating a temporary switch, the control pattern of the load assigned to this switch is changed to another temporary control pattern for a predetermined period of time. By shifting to the warning control pattern for a predetermined period of time and then returning to the original control pattern, unnecessary load operation can be effectively stopped with a simple operation, which is not only advantageous from the point of view of power saving but also regular operation. It is an object of the present invention to provide a load control device that can eliminate discomfort and danger at this time by issuing a warning to the effect of returning to a control pattern.

An embodiment of the present invention will be described below with reference to the drawings. FIG. 4 shows an example in which the present invention is applied to a lighting control device. In the figure, reference numeral 11 denotes a central control device, and a plurality of (two in the illustrated example) terminal devices 13 and 14 are connected to this device 11 via a common transmission line 12. (4 in the illustrated example) loads such as lighting fixtures 15a to 1
5d, 16a to 16d are connected. Further, a temporary switch 17 is connected to the terminal 13 for changing the lighting pattern of the lighting equipment to another lighting pattern for a certain period of time. This switch 17 is provided with a group of push switches (momentary switches), ie, temporary switches 17a to 17d, which are closed only when pressed. Here, the temporary switch 17 may be connected to the terminal device 14.

In this case, the central control unit 11 is provided with a central processing unit (hereinafter abbreviated as CPU) 11a, and this CPU 11a includes a main timer 11.
b, a time limit circuit 11c, a level detector 11d that detects the level of the analog signal from the optical sensor 18 and converts it into a digital signal, a console panel 11e that inputs and outputs data, and a RAM that stores data.
11f, ROM11 that stores the control program
g, interface circuit 11h, temporary timer 11i ₁ to 11i ₈ and warning timer 11
j ₁ to 11j ₈ are connected to each other. Here, the timers 11i ₁ to 11i ₈ and 11j ₁ to 11j ₈ are CPU1
The count set from 1a starts and the CPU 11a
A time limit signal is sent to the CPU 11a, and when a preset time limit has elapsed, a time limit end (time up) signal is sent to the CPU 11a to reset the CPU 11a. In addition, the terminal devices 13 and 14 have output circuits 13a to 13d and 14a.
~14d to relay circuits 13e~13h, 14e~
14h, and are connected to power supplies 13j and 14j via dimming control circuits 13i and 14i. Here, the dimming control circuits 13i and 14i are composed of, for example, a thyristor and a phase control circuit, and the central control unit 11
The phase of the thyristor is controlled by the control signal from
By dimming the lighting equipment all at once, this can be used as a warning.

In addition, the terminal device 13 has the above-mentioned switches 17a to 17.
The same number of flip-flops 13k to 13n as d are provided. This flip-flop 13k~13
Each time the corresponding switch 17a to 17d is pressed, the flip-flops 13k to 13n perform an inverted operation, and the outputs of the flip-flops 13k to 13n are sent to the central control unit 11. Furthermore, these terminal devices 13,
14 incorporates a circuit for polling with the central control unit 11, which is configured as shown in FIG. 5, for example. In other words, when it is composed of random logic, there is a line receiver 31 that receives signals from the transmission line 12, a discrimination circuit 32 that discriminates between a start signal and a data signal for synchronization with the central control unit 11, and a serial-in-parallel circuit that reads address signals. out shift register 34,
A comparator 35 that determines whether this address signal matches its own address, a serial-in/parallel-out shift register 39 that reads the sent control signal, a latch circuit 40 that latches this control signal, and this latch circuit. 40 output, the relay circuit 42 (the above-mentioned relay circuits 13e to 1
3h, 14e to 14h. ), a phase control circuit 48 (corresponding to the above-mentioned dimming control circuits 13j and 14j), and a temporary switch 46 (the above-mentioned switches 17a to 17d). ), a flip-flop 50 (corresponding to the flip-flops 13k to 13n described above), a parallel-in/serial-out shift register 45 that reads the state of the flip-flop 50, and a clock pulse circuit that supplies clock pulses to the entire circuit. 3
6. A counter circuit 37 for timing the entire circuit, gate circuits 33, 38, 44, and a line driver circuit 4 for returning signals to the transmission line.
It has 3. Here, reference numeral 47 in the figure represents a load corresponding to the above-mentioned lighting devices 15a to 15d, 16a to 16d, which is on/off controlled by the relay circuit 42 and dimmed by the phase control of the thyristor 49.

Next, the exchange of signals between the central control unit 11 and the terminals 13 and 14 will be explained. First, FIG. 6 shows the format of transmission signals to the terminals 13 and 14. That is, FIG. 6a shows signals (i-1), i, and (i+1) for a plurality of terminal devices, which are arranged in a time-division series as shown. Each signal group (i-1), i, (i+1) is a signal group corresponding to the address of a terminal device, and this signal group is arranged in the same number or more as the number of terminal devices connected to the transmission line 12. The central control unit 11 sends and receives signals to and from the terminal device number i in one signal group time i, and when the signal transmission and reception is completed from the terminal device at the first address to the terminal device at the last address, it returns to the terminal device at the first address. Go back and repeat this cycle. FIG. 6b shows the structure of each signal group.
That is, the signal group consists of a start signal a, an address signal b, a control signal c, a dimming control signal c', and a switch signal d, among which the start signal a, address signal b, control signal c, and dimming control signal The signal c' is sent from the central controller 11 to the terminals 13 and 14, and the switch signal d is sent from the terminals 13 and 14 to the central controller 11. Binary signals are used for these signals as appropriate.
Modulation such as FSK or PSK may also be applied. In this case, the central controller 11 and the terminals 13 and 14 require demodulators. Also, parity bits may be added to increase redundancy. In this case, the central control signal 1 and the terminals 13 and 14 require a parity check function. On the other hand, the start signal is pulse width modulated to distinguish it from other signals.

The transmission and reception of signals between the central control unit 11 and the terminals 13 and 14 is always initiated by the central control unit 11. Therefore, the drivers of the terminals 13, 14 are enabled only during time d (FIG. 6) when a start signal is sent and the next address signal matches its own address.

First, the line driver of the central control unit 11 and the line receivers of the terminals 13 and 14 are respectively enabled, and when a start signal is sent from the central control unit 11 to the transmission line 12 in this state, the respective terminals 13 and 14 are enabled. In the figure, the pulse width discrimination circuit 32 discriminates the start signal and the gate 33
is opened and the subsequently sent address signal is read into the shift register 34. In this case, the address signal is represented by a binary code equal to or greater than the number of terminals; for example, if there are 31 terminals, the address signal is represented by 5 bits. The read address is compared with the address set in each of the terminals 13 and 14 by a comparator circuit 35, and only if they match, the gate 38 is opened and the control signal sent next is read into the shift register 39. The read control signal is latched in the latch circuit 40, and further driven by the drive circuit 41 to the relay 42, which connects the load lighting fixture 4.
7 on/off control.

Here, the terminal devices 13 and 14 have their own addresses arbitrarily set, and if the address signal read into the shift register 34 and their own address do not match, the gate 38 will not open and the next control signal sent will be Not loaded. One bit of the control signal corresponds to one output circuit of the terminals 13, 14, and if each terminal 13, 14 has four circuits as shown in Fig. 4, the control signal will be 4 bits. Therefore, "1" and "0" correspond to on/off of the output circuit relay.

When the reading of the control signal is completed, the central control unit 11 disables the line driver and enables the line receiver so as to read the switch signal sent from the terminal device 13 or 14 with the matching address. At this time, the terminal device 13 or 14 whose address matches enables the line driver 43 shown in FIG. 5 to send a switch signal to the central controller 11, and disables the line receiver. This switching is performed by counting the clock pulses generated by the clock pulse circuit 36 with a counter circuit 37. In addition, the terminal device 13 or 1 whose address does not match
4 means the line driver is not enabled.

In this case, a signal corresponding to the operation state of the temporary switch 46 is transmitted from the shift register 45 to the transmission line 12 via the gate 44 and line driver 43.
However, if it is assumed that none of the switches 46 are currently operated, the control signal from the central controller 11 will not change.

Through the above process, the first exchange of signals between the terminals 13 and 14 is completed, and the central control unit 11 sends out the next signal. In this way, the central controller 1
1 sequentially and periodically exchanges signals with terminal devices 13 and 14.

By the way, in the central control device 11, the terminal devices 13,
The switch signal sent from 14 is sent to CPU 11.
Inputs to the CPU 11a include signals from the main timer 11b and signals from the optical sensor 18.

The signal from the timer 11b is input to the CPU 11a at the time set by the time limit circuit 11c. This timer 11b is used when controlling the load according to a determined time schedule. The optical sensor 18 detects daylight in a building such as a building, and is installed near a window outdoors or indoors, and inputs an analog signal corresponding to daylight to the level detector 11d. The level detector 11d compares a preset reference value with the signal from the optical sensor 18, generates a digital signal, and sends the signal to the CPU.
11a. This number of levels may be two or more. The light sensor 18 is then used to control the lighting equipment near the window depending on the intensity of daylight.

In this manner, the CPU 11a receives these signals and performs logical operations according to a predetermined program to determine control signals for each of the terminals 13 and 14. This program is usually ROM11
g (read-only memory).

On the other hand, the lighting pattern data and temporary switch allocation data as reference data are stored in RAM1.
It is written in 1f. Normally, this data is manually written into the RAM 11f from the console panel 11e using a keyboard or the like. In addition to this, the RAM 11f also occupies an area of data indicating the state of the temporary switch, data indicating the state of the time limit circuit 11c, and data indicating the level state from the optical sensor 8.

Next, the memory format of the RAM 11f is shown in FIG. In FIG. 7, lighting pattern data and temporary switch assignment data are written for each output circuit. The output circuit address is obtained by assigning numbers to all the output circuits (4 circuits in the illustrated example) of each terminal device 13 and 14. For example, if the terminal device is 16
If there are 16x4 = 64 output circuit addresses. It is assumed that the output circuit addresses are arranged in numerical order in one terminal device. As a result, output address #1 #2 #3 #4 belongs to terminal device address 1. Therefore, the control signal for terminal device address 1 is the output circuit address.
This will be for #1 #2 #3 #4.

Next, the lighting pattern and temporary switch allocation data will be explained. For example, if we assume a plan view of an office floor where lighting equipment is arranged as shown in Figure 8, the
The lighting fixtures #1 to #64 are all connected to output circuits at different addresses. As a result, the lighting fixture corresponding to output circuit address #1 #2 #3 #4 is connected to the terminal device at address 1. Therefore, 64÷4=16 terminal devices are used here. Furthermore, as shown by the dotted lines, this office floor is divided into eight areas according to department, for example, and if one temporary switch is assigned to each area, there will be eight temporary switches, and these switches are connected to the temporary timer 11i _1. ~ _11i8 Warning timers _11i1 to _11i8 are associated with the program. Further, addresses are also assigned to these temporary switches. In this case, four temporary switches can be connected to one terminal, so there are 16×4=64 addresses, and these addresses are also arranged in numerical order in one terminal, like the output circuit addresses. Therefore, the temporary flip-flop address in Figure 7b is originally up to #64.
In the case of FIG. 8, there are eight areas, so only up to #8 is shown in FIG. 7b. In other words, eight temporary switches are connected to the terminals at addresses 1 and 2. Therefore, a terminal device to which a switch is not connected will always generate a "0" signal, that is, an off signal, as a switch signal.
Flip-flop addresses #9 to #64 contain only "0" signals. Further, data determining which switch each appliance corresponds to is written in a binary code in the temporary allocation data area of FIG. 7a. In this case, since there are eight switches, 3-bit data is written. As mentioned above, if four switches are connected to all 16 terminals, 6 bits of data is required. Temporary switch allocation data is displayed on the console panel 11 when the area classification is changed.
It can be rewritten with the manual from c. Also, the seventh
In FIG. 1A, temporary lighting pattern data is provided for each output circuit address, as well as types of flags indicating the current state of this output circuit, that is, a regular flag, a temporary flag, and a warning flag.

Next, a lighting pattern is determined in advance in order to control the lighting equipment shown in FIG. 8 according to the time schedule and the degree of daylight. For example, in FIG. 9, the hatched appliances are turned off.

Figure 9a shows the lighting pattern during work when the daylight level is , Figure 9b shows the lighting pattern during work when the daylight level is , and Figure 9c shows the lighting pattern after work. is the night lighting pattern.

Here, as the daylight level increases, the daylight becomes stronger, and FIG. In FIG. 9b, the daylight is weaker than in a, so the number of appliances that are turned off is reduced.

Which of these lighting patterns is selected is determined by the CPU 1 based on a combination of the input from the timer time limit circuit 11c and the input from the optical sensor 18.
It is calculated and determined according to the program 1a. Therefore, the on/off data for each lighting pattern is written in the lighting pattern data area of FIG. It is expressed and written in bit correspondence. Here, the lighting pattern data is manually written from the console panel 1h when changing the lighting pattern.

Further, FIG. 3b shows an area indicating whether the temporary flip-flop (here, there are 8 flip-flops) is "1" or "0", and FIG. 7c shows an area showing the state of the timer time limit circuit 11c (this (6 channels in the example) Figure 7 d shows the area at which level the level from the optical sensor 18 is (level 3 in this example), and Figures 7 e and f show whether the temporary timer warning timer is set or reset. These are all written in bit correspondence in the area indicating whether the data is being read or not. For example, in FIG. 7b, if the flip-flop is set, it is "1"; if it is reset, it is "0"; in FIG. 7c, it is "1" if a certain time circuit channel is turned on; In d, the address corresponding to the daylight level is "1" and the others are "0", and of course in Figures 7c and d, only one address is "1" and the others are "0". Become. Further, temporary switch data sent from the terminal device to the central control unit is written into the memory shown in FIG. 7a each time.

In this way, the memories of FIGS. 7a-7f are used as look-up tables for the CPU 11a to determine control signals to send to the terminals. In other words, in this case, the CPU 11a checks the time limit of the main timer and the light sensor level,
A lighting pattern (regular lighting pattern data) is determined by a combination of both, and then to determine the control signal for one output circuit, the temporary switch address to which that output circuit is assigned is determined, and then the determined temporary switch is operated. Check whether it was done or not. This can be done by checking whether there has been a state change in the temporary flip-flop corresponding to the temporary switch. If there is a state change in the temporary flip-flop after this,
If there is no pattern, it is branched into two, and whether it is a temporary lighting pattern or a warning lighting pattern from the regular lighting pattern is checked using each flag shown in FIG. 7a. In this way, the control signal for one output circuit ("1" if on, "0" if off) is determined.

Therefore, if this operation is repeated in sequence, the lighting equipment will be automatically controlled according to the time and the degree of daylight. FIG. 10 shows an example of a lighting pattern obtained in this manner.
In other words, Figure 10 shows an example of a temporal change in the lighting pattern in a certain area, and the time period is T ₁ to _{T 6.}
The lighting pattern is programmed to change depending on the time of day. Here, T ₁ is before work, T ₂ and T ₄ are during work, T ₃ is lunch break, T ₅ is after work, and T ₆ is night time. The vertical axis is the number of devices that are turned on. In this case, during times T ₂ , T ₃ , and T ₄ , the lighting pattern is changed by input from the optical sensor, and the number of appliances that are turned on may change.

When the temporary switch 17a is pressed at time _t1 from this state, the corresponding flip-flop 13k is inverted and its output is sent to the central control unit 11 and written into the RAM 11f. Then, the CPU 11a changes the control signal for the appliance assigned to the above-mentioned flip-flop 13k from the regular lighting pattern to one corresponding to the temporary lighting pattern in accordance with the state change at this time, and sends it to the terminals 13 and 14.
As a result, the lighting fixture corresponding to the temporary switch 17a is controlled by the temporary lighting pattern A. At the same time, a corresponding temporary timer starts. After that, when a predetermined period of time has elapsed and time _t2 arrives, the warning timer starts and the warning lighting pattern B shifts to warning lighting pattern B. As a result, the dimming control signal c' shown in FIG. 6b becomes "1" before transition to this pattern. Then, in FIG. 5, the phase control circuit 48 is energized via the latch circuit 40 to control the thyristor 49 to a predetermined phase, thereby dimming the lighting equipment assigned to the temporary switch 17a. This will give a warning to the person under the device. Therefore, if you wish to continue working, press the temporary switch 17a again at time _t3 , which is before time _t4 when the warning timer times up, and the temporary lighting pattern changes to A again, and at the same time the temporary timer is set.
This resets the warning timer. Furthermore, at time _t5 , the warning pattern changes again and the light is in the dimming state. In this case, if the temporary switch 17a is not pressed until the warning timer times up, the lighting pattern switches to the regular lighting pattern at time _t6 .

Further, if the temporary switch 17a is pressed again in the state of the temporary lighting pattern A, the lighting pattern is switched to the regular lighting pattern and the temporary timer is reset. As a result, if the work is completed during the temporary lighting pattern, the temporary lighting pattern can be immediately returned to the regular lighting pattern.

Therefore, with this configuration, by operating the temporary switch, it is possible to easily change from the regular lighting pattern to the temporary lighting pattern, for example, full lighting, and if left in this state, it will automatically change after a predetermined time. If you switch to the dimming state of the warning lighting pattern and leave it as it is, it will automatically return to the regular lighting pattern after a predetermined period of time.Furthermore, if you operate the temporary switch while the dimming state of the warning lighting pattern is activated, the light will turn off again. If you can shift to the temporary lighting pattern and then operate the temporary switch in the temporary lighting pattern, you can immediately return to the regular lighting pattern. Therefore, unlike in the past, the temporary lighting pattern does not suddenly return to the regular lighting pattern, and it is possible to eliminate inconveniences that may cause discomfort or danger to the person working.

Next, FIG. 11 shows another embodiment of the present invention, in which the same parts as in FIG. 4 are given the same reference numerals. In this case, the temporary switch 17 is not connected to the terminal device 13 but directly connected to the central control device 11.

In this way, the function of transmitting data from the terminals 13 and 14 to the central control device 11 is not required, and the cost is reduced accordingly. Although the flip-flop is built into the switch panel 17 in FIG. 11, it may also be provided in the central control unit 11.

Even with this arrangement, the same effects as described above can be expected.

It should be noted that the present invention is not limited to the above-mentioned embodiments, but can be implemented with appropriate modifications within the scope without changing the gist.
For example, in the embodiment described above, the lighting equipment is turned on and off using a relay, and dimming is performed using a thyristor, but instead of a relay, a thyristor is inserted in each output circuit, and the thyristor is used to perform on/off dimming. You can do it like this. In this case, a plurality of independent dimming control devices are required. Furthermore, in the above embodiment, the timers 1i ₁ to 1i ₈ have added timer functions corresponding to the switch groups 17a to 17d of the temporary switch 17, but
A common timer function may be used to change all temporary lighting patterns to warning patterns at a predetermined time. Furthermore, in the above, the time for connecting the temporary lighting pattern after operating the temporary switch 17 was determined by the timers 11i ₁ to 11i ₈ ; In the example of Fig. 10, T ₁ →T ₂ , T ₂ →T ₃ , T ₃
→T ₄ , T ₄ →T ₅ , T ₅ →T ₆ , T ₆ →T ₁ ) Temporary lighting patterns may be connected. In this way, the timers 11i ₁ to 11i ₈ become unnecessary. In this case, if the period between T ₆ → T ₁ is too long, a new time limit can be set in the middle. Furthermore, the above-mentioned timers 11b, 11i ₁ to 11i ₈ , 1
1j ₁ to 11j ₈ , the time limit circuit 11c does not need to be implemented as hardware, and a method of counting commercial power supply synchronous pulses, for example, can be used in the program of the CPU 11a. Further, in the above-described embodiment, dimming is performed as a warning lighting pattern, but it is also possible to add another output circuit to the terminal device and generate a warning by sounding a chime or a buzzer. Furthermore, although the flip-flop is realized by electrical means in the above description, it can also be replaced by a toggle switch (alternate switch). In this case, the relationship between the direction in which the toggle switch is tilted and the lighting pattern is completely random, which may cause confusion in operation, but it has the advantage of being inexpensive. Furthermore, although the above description has consistently been about a lighting control device, the present invention can also be applied to general load control.

As described above, according to the present invention, by operating a temporary switch, the control pattern of the load assigned to this switch is changed to another temporary control pattern for only a predetermined period of time, and after the elapse of the predetermined period of time, the control pattern for the load assigned to this switch is changed for a further predetermined period of time. By shifting to the warning control pattern and then returning to the original control pattern, the operation of unnecessary loads can be effectively stopped with a simple operation, which is not only advantageous from the point of view of power saving, but also a normal control pattern. It is possible to provide a load control device that can prevent discomfort and danger at this time by issuing a warning to the effect that the vehicle will return to normal.

[Brief explanation of the drawing]

FIG. 1 is a block diagram showing an example of a conventional load control device, FIG. 2 is a diagram for explaining the same device, and FIG. 3 is a diagram for explaining a conventional load control device with a temporary function added. Fig. 4 is a block diagram showing an embodiment of the present invention, Fig. 5 is a block diagram of a terminal device used in the embodiment, and Figs. 6a and b show the format of the transmission signal used in the embodiment. Figures 7a to 7f are used in the same example.
FIG. 8 is a plan view of the off-ease floor to which the same embodiment is applied, and FIG. 9 is a diagram showing the format of the RAM.
Figures a, b, c, and d are diagrams for explaining the lighting pattern of the same embodiment, Figure 10 is a diagram for explaining the same embodiment, and Figure 11 is a block diagram showing another embodiment of the invention. It is. 1, 11... Central control device, 2, 12... Transmission line,
3, 4, 13, 14...terminal device, 5a to 5d, 6a
~6d, 15a~15d, 16a~16d...Lighting equipment, 7...Switch panel, 7a~7d...Toggle switch, 8, 18...Light sensor, 11a...
CPU, 11b...Main timer, 11c...Time limit circuit, 11d...Level detector, 11e...Console panel, 11f...RAM, 11g...ROM, 11
h...Interface circuit, _11i1 to _11i8 ...Temporary timer, _11j1 to 11j8...Warning timer, ₁₇ ...Temporary switch, 17a to 1
7d...Switch group, 13i, 14i...Dimmer control circuit, 13k-13n, 14k-14n...Flip-flop.

Claims (1)

[Claims] 1. A load is connected to each of a plurality of terminal devices each having a unique address, and these terminal devices are connected to a central control device via a common transmission line, and a control pattern programmed in advance is executed. Therefore, in the device that controls the load, the control signal for the load assigned to the switch is changed from the regular control pattern for a predetermined period of time by a state change in response to the operation of a predetermined switch connected to the central control device or terminal device. A load control device characterized in that the control pattern is changed to another control pattern, and after the predetermined time elapses, the control pattern is changed to a warning control pattern for a predetermined time, and then the control pattern is returned to a normal control pattern. 2. The control signal according to claim 1, characterized in that when the state of the switch changes again while the load is being controlled by the warning control pattern, the control signal is shifted to the other control pattern. Load control device. 3. Claims 1 or 2, characterized in that when the state of the switch changes while the load is being controlled by the different control pattern, the control signal is returned to the normal control pattern.
The load control device described in Section 1. 4. The load control device according to any one of claims 1 to 3, wherein the switch is a combination of a momentary switch and a flip-flop. 5. The load control device according to any one of claims 1 to 4, wherein the load is a lighting device. 6. The load control device according to claim 5, wherein the warning control pattern is one that controls dimming of a lighting device.