JP4981859B2 - Lighting communication system - Google Patents

Description

  The present invention relates to a communication system for lighting installed in, for example, a detached house and an apartment house.

  FIG. 9 is an explanatory diagram of radio communication using radio waves or infrared rays performed between the parent device and the child device in the lighting system (for example, see Japanese Patent Application No. 2002-039340).

  In the above lighting system, as shown in FIG. 9, in the wireless communication of “1”, control commands such as lighting and extinguishing are transmitted to all the slave devices controlled by the master device by broadcast or unicast, In the wireless communication “2”, a confirmation command for confirming whether or not the control command has been received is transmitted from the parent device to the first child device, and in the wireless communication “3”, the return command is the first command. Sent from the slave unit to the master unit. Similarly, when the confirmation command is transmitted from the parent device to the second and third child devices in the wireless communication of “4” and “6”, the reply command is transmitted in the wireless communication of “5” and “7”. It is transmitted from the second and third slave units to the master unit. Then, by receiving the reply command, the parent device can confirm that the child device has surely received and controlled the control command. If no reply command is received, it can be determined that the slave unit has not received a control command, and processing such as resending a similar control command to the slave unit can be executed.

  In this way, after the control command is transmitted from the master unit to the slave unit, the slave unit does not determine the reply timing, but the master unit manages the reply timing from the slave unit to the master unit. It is possible to prevent a reply signal from the machine to the parent machine from colliding and the parent machine from receiving a reply command from the child machine.

  Further, Patent Document 1 discloses a remote-control lighting system that avoids signal collision by randomizing a reply timing or transmitting a plurality of times.

  Patent Document 2 discloses a lighting control system device that avoids a collision by transmitting a command by delaying the transmission timing based on address information in order of increasing address number.

JP 2001-313183 A (paragraph 0023, etc.) JP 2002-299072 (paragraph 0027 etc.)

  However, in the lighting system and the remote control type lighting system, there is a tendency that the communication occupation time required for a series of responses by each slave unit becomes long. If the communication occupation time is long, there are many cases where other communication is obstructed, and it may be a situation that the control of the system must be temporarily interrupted.

  In the lighting control system device, since the reply timing is provided by the address set in advance in each slave unit, there is no problem when communicating by broadcast, but for a plurality of selected or selected slave units. When a control command is transmitted, a blank time may occur when the slave unit replies. For example, when a control command is transmitted to the slave units at addresses 1 to 5 by broadcasting, each slave unit does not cause a problem of blank time by transmitting after a delay time corresponding to the address. When a control command is transmitted only to the slave unit at address 1 and the slave unit at address 5, each of addresses 2 to 4 is set between the reply period from the slave unit at address 1 and the reply period from the slave unit at address 5 Each reply period assigned to the slave unit becomes a blank time. When such a blank time occurs, the control becomes complicated, for example, an interrupt of another control command is entered.

  The present invention has been made in view of the above circumstances, and it is possible to prevent a reply signal from each slave unit from colliding with the master unit, and to reduce a communication occupation time required for one series of reply by each slave unit. An object of the present invention is to provide an illumination communication system.

  The invention according to claim 1 for solving the above-mentioned problem is an illumination communication system comprising a master unit capable of bidirectional communication and a plurality of slave units, wherein the master unit is provided for each of the plurality of slave units. The reply necessity information is collectively created as a destination record address for the plurality of slave units, a transmission signal including the destination record address is transmitted to the plurality of slave units, and each of the plurality of slave units is A reply signal corresponding to a transmission signal from the master unit is transmitted to the master unit in accordance with an individual order that is specified based on the destination record address and does not cause a blank time in a reply timing between each slave unit, and The machine includes a first slave unit having a short time until execution of predetermined control is completed and a second slave unit having a long time until execution of predetermined control is completed. Add to destination record address A control command for designating predetermined control to be executed by the slave unit is included in the transmission signal, and each of the plurality of slave units is based on the destination record address and the content of the control command. A reply signal for the transmission signal from the master unit is specified in accordance with the individual order in which the first slave unit is earlier than the second slave unit without causing a blank time in the reply timing between the slave units. Is transmitted to the base unit.

  In this configuration, since each of the plurality of slave units transmits a reply signal to the master unit according to an individual order, the reply signals from each slave unit to the master unit can be prevented from colliding with each other, and each of the plurality of slave units can be prevented. However, since the reply signals are transmitted to the master unit in the order in which no blank time is generated in the reply timing between the slave units, it is possible to reduce the occupation time required for a series of replies by each slave unit. In addition, among a plurality of slave units, a group having a short time until execution of predetermined control finishes replying before a group having a long time, so the time taken for one reply by each slave unit is reduced. This can be further shortened.

According to a second aspect of the present invention, in the first aspect of the present invention, in the individual order specified based on the transmission destination record address and not causing a blank time in the reply timing between each slave unit , when the slave unit is abnormal It is characterized in that the priority order of the slave device that performs abnormality notification for notifying the abnormality to the parent device is set highest . In this configuration, an abnormal handset can be excluded first, and processing such as retransmission becomes unnecessary, and as a result, it is possible to reduce the occupation time required for a series of replies by each handset. Become.

  ADVANTAGE OF THE INVENTION According to this invention, while being able to prevent the reply signal from each subunit | mobile_unit from colliding, the communication occupation time concerning one series of reply by each subunit | mobile_unit can be shortened.

It is explanatory drawing of the reply order determination of the subunit | mobile_unit in the communication system for illumination of Embodiment 1 by this invention. FIG. 6 is an explanatory diagram of a modification of the first embodiment. It is a figure which shows the content contained in the signal transmitted / received between the main | base station and the subunit | mobile_unit in the communication system for illumination of the reference example 1 by this invention. It is a block diagram of a main | base station. It is a block diagram of a subunit | mobile_unit. It is operation | movement explanatory drawing of the communication system for illumination. It is explanatory drawing of the effect of the reference example 1. FIG. It is operation | movement explanatory drawing of the communication system for illumination of Embodiment 2 by this invention. It is explanatory drawing of the radio | wireless communication by the electromagnetic wave and infrared rays performed between the main | base station and a subunit | mobile_unit in an illumination system.

(Reference Example 1)
FIG. 3 is a diagram showing contents included in signals transmitted and received between the master unit and the slave unit in the lighting communication system of Reference Example 1 according to the present invention, FIG. 4 is a configuration diagram of the master unit, and FIG. 5 is a slave unit. FIG. 6 is a diagram for explaining the operation of the communication system for illumination, and FIG. 7 is a diagram for explaining the effect of Reference Example 1.

  As shown in FIGS. 4 and 5, the lighting communication system of Reference Example 1 includes at least a master unit 1 including a communication unit 11, a command creation unit 12, an operation unit 131, a power supply unit 19, and a control unit 10. A plurality of slave units 2 including a communication unit 21, a command creation unit 22, an input unit 23, a determination unit 26, a counter unit 27, a load unit 28, a power supply unit 29, a control unit 20, and the like. For example, two-way wireless communication is possible between the machine 1 and the plurality of slave units 2.

  The command creation unit 12 may be included in the control unit 10, and at least one of the command creation unit 22, the determination unit 26, and the counter unit 27 may be included in the control unit 20.

  The communication unit 11 shown in FIG. 4 is for performing bidirectional communication wirelessly, and is configured by an RF module for specific low power wireless, for example. In specific low-power wireless communication, transmission is performed after confirming whether or not communication of the same frequency is being performed in the surroundings at the time of transmission.

  As shown in FIG. 3A, the command creation unit 12 sets the transmission unit ID (the ID of the base unit 1), the transmission destination record address, and the control content (control command) as a set, The signal processing included in the transmission signal to the slave unit 2 is performed.

  The bit length of the transmission source ID is, for example, a bit length (48 + α) obtained by adding a predetermined parity bit (α) to 48 bits. The bit length of the destination record address is determined by the maximum number of slave units 2 that can be connected. In Reference Example 1, it is assumed that the maximum number of slave units 2 that can be connected is 32, and the bit length of the destination record address is set to 32 bits (32 records). The bit length of the control content (control command) is set based on various control commands. Control commands include commands such as lighting, extinguishing, time setting, mode start, and mode release. Control commands such as lighting and extinguishing are expressed by about 8 bits, for example, and the command when setting the time, setting value, etc. in the handset 2 may be 8 bits or more. Note that the maximum number can be set (variable) by the operation unit 131, and the command content may be designed to be variable by providing a byte counter.

  In FIG. 4, the operation unit 131 includes, for example, a push switch and a slide switch, and is used to transmit a control command to the child device 2 and is used to set an address of the child device 2. Note that the operation unit 131 may be configured to be connected to a mobile device such as a portable personal computer or a PDA, and transmits the contents (control command) set in the mobile device to the child device 2 via the parent device 1. It may be used.

  The power supply unit 19 supplies power to each unit in the parent device 1 by, for example, rectifying and smoothing AC power from a commercial power source into DC current.

  The control unit 10 is constituted by, for example, a microcomputer (CPU) and the like, and executes processing such as control of the parent device 1 in general. For example, using the command creation unit 12 and the communication unit 11, reply necessity information for each of the plurality of slave units 2 is created as a destination record address for the plurality of slave units at once, and this destination record address The process which transmits the transmission signal containing this to the some subunit | mobile_unit 2 is performed.

  Here, the reply necessity information is each bit information in the transmission destination record address of FIG. The 32 bit positions in the transmission destination record address are associated with a maximum of 32 slave units 2 at the time of ID registration (exchange) of the slave unit 2, for example, so that the master unit 1 has 32 bit positions. It is possible to recognize which ID of each bit position is assigned to the slave unit 2, and each slave unit 2 determines which bit position of the 32 bit positions is assigned to itself. It is configured so that it can be recognized. Then, the base unit 1 needs to execute the command of the control content, and for the slave unit 2 that needs a reply to confirm that it has been executed, the bit position assigned to the slave unit 2 The information of the bit position assigned to the slave unit 2 is set to “0” for the slave unit 2 that does not need to execute the control content command and naturally does not require a reply. And Here, each bit position is assigned to the first handset 2, the second handset 2,..., The 32nd handset 2 in order from the right end of the transmission destination record address in FIG. Let's go. In this case, in the example of FIG. 3A, each reply necessity information of at least the first, fourth, and eighth handset 2 is “1”.

  By using the transmission destination record address as described above, the address information for specifying the transmission destination becomes an enormous number of bits such as 48 bits of the transmission source address and 48 bits of the transmission destination address × the number of transmissions. In other words, the total bit length included in the signal can be shortened.

  In addition to the above-described units, the base unit 1 includes a detection unit 132 such as a human body detection sensor or a brightness sensor in the input unit 13 including the operation unit 131, and a storage unit 14 such as an EEPROM, A display unit 151 such as an LED and an output unit 15 including a buzzer 152 may be provided. In addition, about the display part 151, the said mobile device may be connected and a setting and a state may be displayed on this display part.

  As shown in FIG. 5A, the slave unit 2 is directly connected to a load unit 28 including a lighting control circuit unit 282 and a lamp 283, and as shown in FIG. 281, a lighting control circuit unit 282, a lamp 283, a power supply unit 284, and a control unit 280 are connected to the load unit 28 so as to be communicable wirelessly or by wire. The lighting control circuit unit 282 is a so-called ballast, and the lamp 283 is a discharge lamp such as an incandescent lamp or a fluorescent lamp. The control unit 280 receives a control signal from the control unit 20 through the communication unit 281 and controls the lamp 283 through the lighting control circuit unit 282.

  The communication unit 21 is for performing two-way communication wirelessly, and is configured by an RF module for specific low power wireless, for example, similar to the communication unit 11. In addition, the communication unit 21 of the slave unit 2 in FIG. 5B can communicate with the communication unit 281 of the load unit 28. In this case, the communication unit 281 is configured by an RF module for specific low-power radio, and uses a communication channel different from the communication channel used by the parent device 1 and each child device 2. When the communication unit 281 of the slave unit 2 in FIG. 5B is of a communication method different from that of the communication unit 21 (for example, a communication unit for wired communication or an infrared communication unit), the communication unit 21 Needless to say, a device corresponding to the communication method of the communication unit 281 is provided.

  As shown in FIG. 3B, the command creation unit 22 sets a transmission source ID (ID of the slave unit 2), a transmission destination record address, and control content (hereinafter referred to as “second control content”). Thus, signal processing included in a reply signal to the base unit 1 via the communication unit 21 is performed.

  The bit length of the transmission source ID is, for example, a bit length (48 + α) obtained by adding a predetermined parity bit (α) to 48 bits. The bit length of the destination record address is the sum of the bit length of the record address determined based on the maximum number of connectable master units 1 and the bit length of the control content (hereinafter referred to as “first control content”). Become.

  The bit length of the second control content is determined by the bit length of the reply command stored therein. For example, the same reply command as the command from the base unit 1 or a reply command preset for reply is stored. In the case of the latter reply command, for example, it can be unified to a fixed length, but it may be impossible for the base unit 1 to determine which control command the reply command is for, but in the case of the former command, Such a problem does not occur. Even when the latter reply command is used, the above problem can be avoided if the command from the parent device 1 is stored in the first control content.

  Each bit position of the record address in the transmission destination record address in FIG. 3B is associated with the maximum connectable master unit 1, so that each master unit 1 can determine which bit position of the record address is self. It is possible to recognize whether the bit is assigned, and the slave unit 2 is configured to be able to recognize to which ID of the master unit 1 each bit position is assigned. In the example of FIG. 3B, based on the transmission source ID included in the transmission signal from the base unit 1, the base unit 1 with that ID is recognized as the base unit 1 at the bit position at the right end of the record address, and its parent In order to indicate that the information is returned to the machine 1, “1” is stored in the bit position on the right end of the record address.

  In FIG. 5, the input unit 23 includes an operation unit 231 and a detection unit 232. The operation unit 231 includes, for example, a push switch and a slide switch, and is used for controlling the load unit 28 from the slave unit 2 and is used for various settings. The detection unit 232 is, for example, a human body detection sensor (pyroelectric sensor) or a brightness detection sensor (CdS or photodiode). In addition, you may make it the detection information by the detection part 232 include in the information (for example, 1st control content) transmitted to the main | base station 1. FIG.

  The determination unit 26 determines the timing for returning a command received via the communication unit 21. The reply timing time (delay time) is set according to the contents of the received control command (such as the bit length of the control command) and the order of the reply itself.

  In Reference Example 1, the total waiting time of each slave unit 2 is (transmission standby time + transmission time of reply signal (reply command B)) × (self order-1) + transmission standby time. The time is obtained by the determination unit 26 (see FIG. 6B). The reply timing time may be calculated by calculation or may be referenced from a previously created table.

  The counter unit 27 is a counter that counts the delay time obtained by the determination unit 26. The reply signal (reply command) is transmitted when the time counted by the counter unit 27 is completed.

  The power supply unit 29 rectifies and smoothes, for example, AC power from a commercial power source into DC current, and supplies power to each unit in the slave unit 2.

  The control unit 20 is constituted by, for example, a microcomputer (CPU) and the like, and executes processing such as control of the slave unit 2 in general. For example, the determination unit 26, the counter unit 27, the command creation unit 22, and the communication unit 21 are used to specify individual addresses that are specified based on the transmission destination record address from the parent device 1 and do not cause a blank time in the reply timing between each child device. In this order, a process of transmitting a reply signal to the transmission signal from the parent device 1 to the parent device 1 is executed.

  Specifically, if the reply necessity information for itself in the transmission destination record address included in the transmission signal received from the base unit 1 is information “1” indicating that a reply is required, the transmission destination record address Based on the storage order of the reply necessity information indicating that the reply is necessary, the order of each slave unit 2 and the order of each slave unit 2 is identified from the individual numbers for each slave unit 2 that requires the reply. Is executed. In the example of FIG. 3A, since the handset 2 that requires a reply is the first, fourth, and eighth handset 2, individual numbers for these, for example, serial numbers 1, 2, 3 are used. By specifying the order of each slave unit 2 and the consecutive self, the first, fourth, and eighth slave units 2 specify that the first, second, and third are in their own order, respectively. To do.

  In addition to the above units, the slave unit 2 may include a storage unit 24 such as an EEPROM and an output unit 25 including a display unit 251 such as an LED and a buzzer 252.

  Next, an operation that is a feature of the first embodiment will be described based on the contents of FIG. As shown in FIG. 6, when the base unit 1 transmits a transmission signal S1 including the control command A in the content of FIG. 3A to each handset 2, the first, fourth, and eighth handset 2 However, the first, second and third are specified as their own order, and the process of the control command A is executed.

  Thereafter, the first slave unit 2 waits for a transmission waiting time (Sending Delay), and transmits a reply signal S2 including the reply command B in the content of FIG. Thereafter, the fourth handset 2 waits for the total time of the transmission standby time and the transmission time of the reply signal S2 and the transmission standby time, and sends a reply signal S3 including the reply command B in the content of FIG. And transmitted to the base unit 1. Thereafter, the eighth handset 2 waits for a total time of the transmission standby time and the transmission standby time twice as long as the transmission standby time and the transmission time of the reply signal, and includes the reply command B with the contents of FIG. A reply signal S4 is transmitted to the base unit 1.

  For example, if the transmission waiting time of several tens of ms is 10 ms and the transmission time of the reply signal is 250 ms, the first handset 2 waits 10 ms, the fourth handset 2 waits 270 ms, The subunit | mobile_unit 2 will wait for 530 ms, and each subunit | mobile_unit 2 starts a reply at the time-up time of the time by the counter part 27. FIG.

  After the above, when the base unit 1 sequentially receives the reply signals S2 to S4 from each handset 2, it is assumed that the processing of the control command A is executed by each handset 2, and the process proceeds to the next processing step. If no reply signal is received from the slave unit 2, the same transmission signal is retransmitted to the slave unit 2. The retransmission is preferably performed for all the slave units 2 when it is desired to unify the times of the slave units 2, and in the case of a control command such as turning on and off, there is no reply. It is desirable to carry out only for the machine 2.

  As described above, according to Reference Example 1, each of the plurality of slave units 2 transmits a reply signal to the master unit 1 in an individual order, so that the reply signals from each slave unit 2 to the master unit 1 do not collide. In addition, each of the plurality of slave units 2 transmits a reply signal to the master unit 1 in the order in which no blank time is generated in the reply timing between the respective slave units 2, as shown in FIGS. 7 (a) and 7 (b). Compared to the communication occupation times 1290 ms and 1280 ms according to the conventional method, the communication occupation time required for a series of replies by each slave unit 2 can be shortened to 770 ms shown in FIG. In the case of the conventional FIG. 7A, if the maximum number of slave units used is 32, the difference in communication occupation time becomes even more significant.

(Embodiment 1)
FIG. 1 is an explanatory diagram for determining the reply order of slave units in the illumination communication system according to the first embodiment of the present invention.

  In the illumination communication system according to the first embodiment, as a difference from the reference example 1, each of the plurality of slave units 2 is specified based on the transmission destination record address from the master unit 1 and the content of the control command. In accordance with the individual order in which the slave unit 2 having the configuration shown in FIG. 5A is earlier than the slave unit 2 having the configuration shown in FIG. A reply signal to the transmission signal from 1 is transmitted to the base unit 1.

  In addition, each child device 2 includes the child device 2 including the self device having the structure shown in FIG. 5A (“child device-integrated” in FIG. 1) and the child device having the structure shown in FIG. It stores child device type identification information indicating which type of child device (“child device-separate”). This slave type identification information is set at the time of ID registration, for example.

  Further, according to the contents of the control command from the master unit 1, each slave unit 2 has a difference between “slave unit-integrated” and “slave unit-separate” in the time until execution of control by the control command is completed. Determine whether or not For example, each slave unit 2 holds a table indicating whether or not there is a difference between “slave unit-integrated” and “slave unit-separate” for each control command. do. Commands such as lighting, dimming, and extinguishing belong to commands that cause a difference, and commands such as time adjustment belong to commands that do not cause a difference.

  In the case of commands such as lighting, dimming, and extinguishing, the “child unit-integrated” child unit can immediately control the load unit 28, whereas the “child unit-separate” child unit has a load unit It takes time until the confirmation information is obtained by turning on, dimming, or turning off the lamp 283 in relation to communicating with the control unit 280 of 28. Note that confirmation of lighting, dimming, extinguishing, etc. of the lamp 283 is not limited to communication with the control unit 280, and it may be determined from the output of the brightness sensor. However, even in this case, time is required.

  Next, an operation that characterizes the first embodiment will be described. However, the slave unit 2 has the first to eighth slave units 2 as in the “slave unit overall address” shown in FIG. 1, and addresses “1” to “8” are respectively registered at the time of registration. Is assigned. In each slave unit 2, the first, third to fifth slave units 2 are "slave unit-separate", and the second, sixth to eighth slave units 2 are "slave unit-integrated". It is assumed that the handset type identification information indicating that it is present is held.

  As shown in FIG. 1, the base unit 1 transmits a transmission signal including transmission destination record addresses whose contents are the first to eighth ranks of the reply basic ranks of the first to eighth slave units 2, respectively. When the control command included in the transmission signal belongs to a command that does not cause a difference, the first to eighth slave units 2 sequentially return reply signals to the master unit 1 as in the first reference example.

  On the other hand, when the control command included in the transmission signal belongs to a command that causes a difference, each handset 2 has the second, sixth, seventh, and eighth handset 2 as the first, third, third. 4, the second handset 2 is ahead of the fifth handset 2, and the second, sixth, seventh, eighth, first, third, fourth and fifth handset 2 are respectively the first, second, It is determined that the order is third, fourth, fifth, sixth, seventh, and eighth. Each slave unit 2 returns a reply signal to the master unit 1 after counting in the counting unit 27 according to the order.

  As described above, according to the first embodiment, among the plurality of slave units 2, a group having a short time until execution of predetermined control is completed returns before a group having a long time. It is possible to further reduce the communication occupation time for one reply.

  In the first embodiment, the table indicating whether or not there is a difference between “child device-integrated” and “child device-separate” is held, but the table is not held, and the child device type identification is performed. A slave unit having the configuration shown in FIG. 5A is specified based on the information and the destination record address from the master unit 1 and does not cause a blank time in the return timing between each slave unit regardless of the contents of the control command. 5 may be configured such that a reply signal to the transmission signal from the parent device 1 is transmitted to the parent device 1 in accordance with the individual order in which 2 is earlier than the child device 2 having the structure of FIG.

  Further, instead of the slave unit type identification information, the entire slave unit address and the reply order address assigned to each of the “slave unit-separate” and “slave unit-integrated” types may be set (see FIG. 1). Alternatively, the addresses 1 to 16 in the transmission destination record address from the base unit 1 may be set as “slave unit-integrated” type, and the addresses 17 to 32 may be set as “slave unit-separate” type.

  Further, as a modification of the first embodiment, as shown in FIG. 2, when the ID registration of all the slave units 2 is completed, the master unit 1 sets the basic reply order of each slave unit 2, and sets the address. The configuration may be such that the reply basic order is changed and the value is transmitted to the handset 2.

(Embodiment 2)
FIG. 8 is an operation explanatory diagram of the illumination communication system according to the second embodiment of the present invention.

  The communication system for lighting according to the second embodiment is different from any one of the first embodiment and the reference example 1, and is specified based on the transmission destination record address, and does not cause a blank time in the reply timing between each slave unit 2. Of the orders, the highest priority order is used for notifying the parent device 1 of the abnormality when the child device 2 is abnormal.

Specifically, the handset 2 in the highest priority order communicates with the highest priority to the base unit 1 during the “abnormality notification” period in the “abnormal control period” shown in FIG. Become. About example of cordless handset 2 that becomes the most prioritized order,
・ Slave unit that cannot operate the received control command normally,
-In the case of battery drive, for example, a slave unit that cannot send an infrared command to the load due to battery consumption,
A slave unit that cannot update data to the EEPROM that constitutes the storage unit 24,
A slave unit in which the input of the human body detection sensor constituting the detection unit 232 is abnormal,
A slave unit in which the switches constituting the operation unit 231 are still input,
・ Slave unit whose lamp 283 has reached the end of its life,
-Examples include slave units with incorrect settings. In addition, in the example of FIG. 8, the 8th subunit | mobile_unit 2 is reporting abnormality.

  As described above, according to the second embodiment, the abnormal handset 2 can be excluded first, and processing such as retransmission (transmission processing of “re-command A” in FIG. 8) becomes unnecessary. It is possible to shorten the communication occupation time required for one reply by each slave unit 1. Moreover, since the main | base station 1 can know presence of the subunit | mobile_unit 2 with abnormality, it can alert | report the presence of the subunit | mobile_unit 2 with abnormality with respect to the above-mentioned mobile device, for example, and the subunit | mobile_unit with abnormality A more reliable response is possible than when the device itself has an abnormality notification function.

DESCRIPTION OF SYMBOLS 1 Parent machine 11 Communication part 12 Command preparation part 131 Operation part 19 Power supply part 10 Control part 2 Slave unit 21 Communication part 22 Command preparation part 23 Input part 26 Judgment part 27 Counter part 28 Load part 29 Power supply part 20 Control part

Claims (2)

A communication system for lighting comprising a master unit capable of bidirectional communication and a plurality of slave units,
The parent device creates reply necessity information for each of the plurality of child devices as a transmission destination record address for the plurality of child devices, and transmits a transmission signal including the transmission destination record address to the plurality of child devices. To
Each of the plurality of slave units sends a reply signal for the transmission signal from the master unit in accordance with an individual order that is specified based on the destination record address and does not cause a blank time in a reply timing between each slave unit. To the machine,
The plurality of slave units include a first slave unit having a short time until execution of predetermined control is completed and a second slave unit having a long time until execution of predetermined control is completed,
In addition to the transmission destination record address, the parent device includes a control command for designating predetermined control to be executed by the child device in the transmission signal,
Each of the plurality of slave units is specified based on the transmission destination record address and the content of the control command, and does not cause a blank time in the reply timing between the slave units. A lighting communication system, wherein a reply signal to a transmission signal from the parent device is transmitted to the parent device in an individual order that is earlier than a second child device. Priority of the slave unit for notifying the master unit of the abnormality when the slave unit is abnormal in an individual order that is specified based on the destination record address and does not cause a blank time in the reply timing between each slave unit The lighting communication system according to claim 1, wherein the highest ranking is set .

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