JP5432666B2 - Relay system for equipment control - Google Patents

Description

  The present invention relates to a relay system for equipment control.

  Conventionally, a plurality of communication control devices are connected via a bus to form a plurality of segments, a plurality of segments are connected via a repeater, and the repeater transfers a data frame between the segments. A transmission system is proposed (see, for example, Patent Document 1).

There is an equipment control system that controls equipment such as a lighting load by using such a transmission system. As shown in FIG. 14A, a load terminal 11 that performs lighting control of the lighting load that is equipment A control terminal 12 that controls the operation of the load terminal 11 in response to an operation input from an operation switch (not shown) and a detection input from various sensors (not shown) is connected via a bus 13 to each of them. The segments 10 ₁ to 10 _n are configured, and the control system is configured by connecting the repeaters 20 _{1 to} 20 _n connected to the bus 13 of each segment 10 ₁ to 10 _n via the bus 30. Yes.

In this control system, for example, the control terminal 12 of the segment 10 in _1, and send to the bus 13 in multicast packets ON control command for turning on the lighting load in response to an operation input from the operation switch, all connected to the bus 13 of the load terminal 11 receives the oN control command, together with the turns on the lighting load, the bus 13 repeater 20 ₁ connected to the other repeaters via a bus 30 oN control instructions from the control terminal 12 20 _{2 to} 20 _n . In other repeater ₂₀ 2 to 20 _n, upon receiving the ON control command transmitted from the repeater 20 _1, and forward this ON control command to the corresponding segments ₁₀ 2 to 10 _n of the bus 13, the bus 13 Since the lighting load is turned on by the load terminal 11 connected to the load terminal 11, the load terminals 11 in the plurality of segments 10 ₁ to 10 _n are operated as one group, and all the equipment in the group are in the same operation state. Is controlling.

JP-A-6-216915

However, in the above-described equipment control system, when control commands having different control contents are transmitted almost simultaneously from the control terminals 12 of the different segments 10 ₁ to 10 _n , the repeaters 20 ₁ to 20 of the segments that have issued the control commands are transmitted. 20 _n may transfer control commands having different control contents to other segments almost simultaneously, so that the load terminals 11 of different segments may be controlled to different control states.

That is, as shown in FIG. 14B, the relay terminals 20 ₁ and 20 ₂ connected to the plurality of segments 10 ₁ and 10 ₂ are connected via the bus 30, and the load terminals belonging to the segments 10 ₁ and 10 ₂ are connected. 11 together operate as a group, when operating the load terminal 11 belonging to another segment (not shown) and the load terminal 11 belonging to the segment 10 ₂ as a group, the load terminal 11 belonging to the segment 10 _1, 10 ₂ the after off as a group, and light up the load terminal 11 belonging to the segment 10 ₂ and the other segments as a group, the load terminal 11 and load terminal 11 belonging to the segment 10 ₂ belonging to the segment 10 ₁ is separately It will be controlled in the operating state. Here, substantially the same time, OFF from the control terminal 12 of the other segment 10 within ₂ from the control terminal 12 of one segment 10 in _one of ON control command is transmitted in a multicast packet (S1 in FIG. 14 (b)) When the control command is transmitted to the bus 13 in a multicast packet (S2 in FIG.), the segments 10 _1, the load terminal 11 based on the oN control command transmitted from the control terminal 12 turns on the lighting load, the segments 10 ₂ , the load terminal 11 turns off the lighting load based on the OFF control command transmitted from the control terminal 12.

The repeater 20 ₁ connected to the segment 10 _1, along with the ON control command input through the bus 13 to transfer to the repeater 20 ₂ via the bus 30 (S3 in the figure), the segment 10 ₂ connected repeater 20 ₂ transfers the OFF control command input through the bus 13 to the repeater 20 ₁ via the bus 30 (S4 in the figure). Note that the repeater 20 _1, 20 when the communication between the _two is half duplex get the difference in transfer time, the transfer processing of ON control command in the time difference can be regarded as substantially the same time from the repeater 20 ₁ to the relay 20 ₂ and (S3), it is assumed that the transfer processing of the OFF control command from the repeater 20 ₂ to the relay 20 ₁ (S4) is performed.

When the repeater 20 _2, the control terminal 12 of the segment 10 ₂ after receiving OFF control instructions (S2), receives the ON control command transferred from the repeater 20 ₁ (S3), the ON control command was transferred through the segment 10 _{and second} bus 13 to the load terminal 11 (S5 in the figure), for lighting the lighting load by the load terminal 11 of the segment 10 _2, the load terminal 11 of the segment 10 ₂ is turned off once It will light up later. The repeater 20 _1, after receiving ON control instruction (S1) from the control terminal 12 of the segments 10 _1, when the received OFF control instructions (S4) transferred from the repeater 20 _2, the OFF control command ( S4) via the segments 10 of _the buses 13 and transferred to the load terminal 11 (S6 in Fig.), for turning off the lighting load by the load terminal 11 of the segment 10 in _one load terminal 11 of the segment 10 ₁ once Turns off after turning on.

In this way, even if the load terminals 11 belonging to the segments 10 ₁ and 10 ₂ are operated in the same operation state, the load terminals 11 belonging to the segment 10 ₁ and the load terminals 11 belonging to the segment 10 ₂ are in different operation states. There is a problem that the equipments of the same group cannot be operated in the same operating state.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a relay system for equipment control capable of operating equipment equipment of a plurality of segments belonging to the same group in the same operation state. It is to provide.

To achieve the above object, a first aspect of the invention, through a load terminal to control the equipment load in response to a control command input from the outside, a control terminal and a bus for transmitting a control command to said load terminal individual segments are constituted by connecting Te, a plurality of the segments are connected via a repeater for relaying transmit control commands between said segments, said repeater, any of the of the segments Upon receiving the control command transmitted from the control terminal, and transfers the control command received to other of said segments, and, 1 to same of said equipment load transmitted from a plurality of said control terminals belonging to a plurality of said segments time difference between the timing of receiving a control command is transferred as long as it is within a predetermined regarded as simultaneous time, control command received after the other of said segments relative to, and, after Characterized in that also return received the control command to the source of the segment.

The invention of claim 2 is the invention of claim 1, wherein the repeater has storage means for storing a control command last transmitted by the control terminal or the repeater in each of the segments , When the repeater receives a control command transmitted from the control terminal of any of the segments, the control content of the control command received this time is the control content of the control command stored in the storage means If they are the same, the control command received this time is not transferred .

The invention according to claim 3, of the individual by the load terminal to control the equipment load in response to a control command input from the outside, and a control terminal that transmits a control command to said load terminal is connected via a bus segment is constituted, a plurality of the segments are connected via a repeater for relaying transmit control commands between the segments, each said control terminal of has a timer function for counting a present time, the time counter function is transmitting the transmission time information timed control commands together with the repeaters, if any one of receiving a control command transmitted from the control terminal of the segment, the control command to other of said received transfer to the segment, and, when receiving the control command for one or more of the same of the equipment load transmitted from a plurality of said control terminal belonging to the segment, before Based on the transmission time information transmitted together with the control command, and transfers the plurality of the control instructions you determined to have been transmitted within a predetermined regarded as simultaneous time, the control command received after the other of said segments and, the control command received after, characterized in that return to the source of the segment.

The invention according to claim 4, characterized in that in the invention of claim 3, wherein the repeater, when receiving the control command for the separate identity of the equipment load transmitted from a plurality of said control terminals belonging to the segment, a plurality of unless performing transfer processing of the control command received previously when the control command from the control terminal is determined to have been transmitted within a predetermined time, the other of said segments the control command previously received The process of transferring to is stopped.

The invention of claim 5 is the invention of claim 4, wherein the repeater, when stopping the processing of transferring the control command previously received the other of the segments, from the control terminal of the other of said segments Upon receiving later transmitted the control command, the process of returning the control command received after the other of said segments characterized in that it also stopped.

The invention of claim 6, the individual by a load terminal to control the equipment load in response to a control command input from the outside, and a control terminal that transmits a control command to said load terminal is connected via a bus segment is constituted, a plurality of the segments are connected via a repeater for relaying transmit control commands between the segments, each said control terminal of was added to the control command transmitted last by the own segment send a new sequence number obtained by adding a predetermined variation to the sequence number with the control command, the repeater, when either receiving a control command transmitted from the control terminal of the segment, the received transferring the control command to other of said segments, and, against the same the equipment load transmitted from a plurality of said control terminals belonging to one or more of the segments When receiving the control command, if the sequence number transmitted together with the control command received is the same determines that the simultaneous control, the control command received after transferred to another of said segments, and, subsequently received characterized in that also returned to the segment source said control command.

  According to the invention of claim 1, in the repeater, when a control command for the same equipment load is transmitted from a plurality of control terminals within a predetermined time, the control command received later is transmitted to another segment and transmitted. Since it is also returned to the original segment, the load terminals belonging to the plurality of segments can be operated in the same operation state according to the control contents of the control command received later.

  According to the invention of claim 2, since it is possible to prevent the control command transmitted immediately before in each segment from being transmitted continuously, the load terminal belonging to a plurality of segments was received later while reducing communication traffic. It can be operated in the same operation state according to the control content of the control command.

  According to the invention of claim 3, in the repeater, when a control command for the same equipment load is transmitted from a plurality of control terminals, which control command is received later based on the time information received together with the control command. Since the control command received later is sent to other segments and sent back to the source segment, the load terminal belonging to multiple segments can be controlled by the control content of the control command received later. Can be operated in the same operation state.

  According to the invention of claim 4, communication traffic is reduced by stopping the transfer process of the control command received earlier, and load terminals belonging to a plurality of segments are set to the control content of the control command received later. Therefore, it can be operated in the same operation state.

  According to the invention of claim 5, when the transfer process of the control command received earlier is stopped, the process of returning the control command received later to the transmission source segment becomes unnecessary. By stopping the process of returning to the source segment, communication traffic can be further reduced.

  According to the invention of claim 6, in the repeater, when a control command for the same equipment load is transmitted from a plurality of control terminals, if the sequence numbers received together with the control command are different, they are not transmitted simultaneously. If the sequence numbers are the same, it can be determined that they were sent at the same time, and the control command received later is sent to the other segment and also sent back to the source segment. Can be operated in the same operation state according to the control content of the control command received later.

1 is a block diagram showing a schematic configuration of Embodiment 1. FIG. It is explanatory drawing explaining the transfer process same as the above. It is a sequence diagram explaining a transfer process same as the above. 10 is an explanatory diagram illustrating transfer processing according to Embodiment 2. FIG. It is a sequence diagram explaining a transfer process same as the above. FIG. 10 is an explanatory diagram illustrating transfer processing according to a third embodiment. It is a sequence diagram explaining a transfer process same as the above. FIG. 10 is an explanatory diagram illustrating transfer processing according to a fourth embodiment. It is a sequence diagram explaining a transfer process same as the above. FIG. 10 is an explanatory diagram illustrating transfer processing according to a fifth embodiment. It is a sequence diagram explaining a transfer process same as the above. FIG. 20 is an explanatory diagram illustrating transfer processing according to a sixth embodiment. It is a sequence diagram explaining a transfer process same as the above. The conventional relay system for equipment control is shown, (a) is a schematic block diagram, (b) is operation | movement explanatory drawing.

  Hereinafter, an embodiment in which the technical idea of the present invention is applied to an illumination control system that controls lighting / extinction of an illumination load that is an equipment load will be described.

(Embodiment 1)
FIG. 1 shows a schematic system configuration of the first embodiment, in which a plurality of load terminals 11 that control equipment loads such as lighting loads and control terminals 12 are connected to each other by a bus 13. 10 ₁ and 10 ₂ are configured, and repeaters 20 ₁ and 20 ₂ connected to the buses 13 of the segments 10 ₁ and 10 ₂ are connected via the bus 30 to configure a relay system for equipment control. Has been. Incidentally, when describing individual segments or repeater, respectively, the segments ₁₀ 1, 10 _2, repeater ₂₀ 1, 20 ₂ and denoted, when performing general description segment 10, a repeater 20 notation To do.

  The load terminal 11 includes communication hardware (hereinafter abbreviated as a communication HW) 11a that transmits and receives packet data via the bus 13, a lamp (lighting load) 11b, and a lighting circuit that supplies lighting power to the lamp 11b. 11c, and a CPU 11d that performs packet data transmission / reception processing and controls the output of the lighting circuit 11c in accordance with a control command transmitted from the outside as packet data.

The control terminal 12 includes communication hardware (hereinafter abbreviated as a communication HW) 12a that transmits and receives packet data via the bus 13, an operation input unit 12b that receives operation input from the switch 14, and transmission and reception of packet data. The CPU 12c that performs processing and transmits an ON control command for turning on the lighting load or an OFF control command for turning off the lighting load based on the operation signal input from the operation input unit 12b and the operation clock, for example, are counted. Thus, a timer 12d (timer function) for measuring the current time is provided. When all the load terminals 11 belonging to the plurality of segments 10 ₁ and 10 ₂ are operated as one group, the control terminal 12 transmits a control command in a multicast packet, and the control command transmitted in the multicast packet Is transferred to the other segments 10 ₁ and 10 ₂ via the repeaters 20 ₁ and 20 ₂ connected via the buses 13 and 30, and is received by the load terminal 11 in each segment 10 ₁ and 10 ₂ . Therefore, the load terminals 11 in the segments 10 ₁ and 10 ₂ can be collectively operated.

The repeaters 20 ₁ and 20 ₂ are connected via communication bus 21 (hereinafter referred to as “communication HW”) 21 that transmits and receives packet data via the bus 13 of the corresponding segments 10 ₁ and 10 ₂ and the bus 30. Communication hardware (hereinafter abbreviated as communication HW) 22 that transmits and receives packet data to and from other repeaters, a CPU 23, and a memory 24.

  The memory 24 is provided with a data queue 24a for storing transmission / reception data and a relay table storage unit 24b for storing path information for relaying packet data.

  Further, the CPU 23 is provided with transmission / reception data processing units 25 and 26 and a relay processing unit 27 according to its calculation function.

  The transmission / reception data processing units 25 and 26 receive packet data from the communication HWs 21 and 22 in response to a reception notification from the corresponding communication HWs 21 and 22 when receiving data, and temporarily store the received data in the data queue 24a. The transmission / reception data processing units 25 and 26 read transmission data from the data queue 24a in response to a transmission request from the relay processing unit 27 and output the transmission data to the communication HWs 21 and 22 when transmitting data. 31 is transmitted.

The relay processing unit 27 determines a relay route based on data stored in the relay table storage unit 24b in order to relay packet data between different segments 10 (for example, segments 10 ₁ and 10 ₂ ). Rewrite the packet header and execute the data transfer process.

  That is, when the communication HW 21 receives a control command transmitted from the control terminal 12 belonging to the corresponding segment 10 via the bus 13, the relay processing unit 27 receives the received control command from the communication HW 21 via the bus 30 to another relay. The process of transferring to the device 20 is performed. Further, when the communication HW 22 receives the control command transmitted from the other repeater 20 via the bus 30, the relay processing unit 27 performs a process of transferring the received control command from the communication HW 21 to the bus 13 of the corresponding segment 10. Do. Furthermore, when the communication HWs 21 and 22 receive control commands for the same equipment load (load terminal 11) from a plurality of control terminals 12 belonging to one to a plurality of segments 10 within a predetermined time that can be regarded as substantially simultaneous, The relay processing unit 27 performs a process of transferring the control command received later to another segment 10 and a process of returning the control command to the transmission source segment 10.

Here, transfer processing by the repeaters 20 ₁ and 20 ₂ will be described with reference to FIGS. 2 and 3 by taking _two segments 10 ₁ and 10 ₂ as an example. First, when a user segment 10 ₁ performs ON operation using the switch 14, CPU 12c of the control terminal 12, in response to the ON operation of the switch 14, is transmitted from the communication HW12a ON control command to a multicast packet (FIG. 2 , S1 in FIG. At this time, the load terminal 11 of the same segment 10 ₁ receives the ON control command sent from the control terminal 12 turns on the lighting load (A1 in FIG. 3).

Substantially at the same timing as ON operation is performed by the segment 10 ₁ side, the user on the other segment 10 ₂ performs OFF operation using the switch 14, CPU 12c of the control terminal 12 belonging to the segment 10 _2, switch 14 In response to the OFF operation, the communication HW 12a transmits an OFF control command as a multicast packet (S2 in FIGS. 2 and 3). At this time, the load terminal 11 of the same segment 10 ₂ receives the OFF control command sent from the control terminal 12 turns off the lighting load (A2 in FIG. 3).

The above process ON control command transmitted by S1 is received by the communication HW21 of the repeater 20 _1, the relay processing unit 27 of the repeater 20 _1, by sending a control command received from the communication HW22 bus 30 , to transfer the ON control command to the other repeater 20 ₂ (S3 in FIG. 2, FIG. 3).

The OFF control command transmitted by the processing S2 is received by the communication HW21 of the repeater 20 _2, relay processing unit 27 of the repeater 20 _2, thereby transmitting the control command received from the communication HW22 bus 30 in, to transfer the OFF control command to the other repeater 20 ₁ (FIG. 2, S4 of FIG. 3). At this time, the repeater 20 _1, OFF control command transferred from the repeater 20 ₂ is received by the communication HW22, relay processing unit 27, and the OFF control command is transferred from the communication HW21 to segment 10 ₁ side (Fig. 2, S6 in FIG. 3), the load terminal 11 of the segment 10 in _one is turn off by the OFF control command.

Here, in repeater 20 _2, through the timing of ON control command via the repeater 20 ₁ from one segment 10 ₁ (S3) is input, the bus 13 from the control terminal 12 of the other segment 10 ₂ time difference between the timing at which the OFF control command (S2) is directly input is within the predetermined time period that can be regarded as substantially the same time, the relay processing unit 27 of the repeater 20 _2, control command received later (in this case the oN control command) sent from the segment 10 _1, performs normal transfer process of transferring the other segment 10 ₂ side (S5 in FIG. 2, FIG. 3), the transmission source via the repeater 20 ₁ segment is performed also return process for returning to the 10 ₁ side (FIG. 2, S7 in FIG. 3). At this time, the load terminal 11 belonging to the segment 10 _2, receives ON control command transferred from the repeater 20 ₂ (S5), and turns on the lighting load (A3 in FIG. 3). Further, the load terminal 11 belonging to the segment 10 ₁ receives OFF control command transferred via the repeater ₂₀ 2, 20 ₁ from the segment 10 ₂ side (S6), after once turns off the lighting load, receives ON control command is returned via the repeater 20 ₁ from the repeater 20 ₂ (S7), it turns on the lighting load again (A4 in Fig. 3). Therefore, all of the load terminal 11 belonging to two segments 10 _1, 10 _2, according to ON control command received after the repeater 20 ₂ will operate in the same operating state (lighted state).

  As described above, when the relay processing unit 27 of the repeater 20 receives a control command from any of the segments 10, the relay processing unit 27 performs a transfer process of transferring the control command to another segment 10, and includes one or more segments. 10, when control commands for the same equipment load (load terminal 11) transmitted from a plurality of control terminals 12 belonging to 10 are received by communication HWs 21 and 22 within a predetermined time that can be regarded as substantially simultaneous, control commands received later Is transferred to the other segment 10, and the control command is returned to the transmission source segment 10.

  Therefore, since the control command received later is transferred to the other segment 10 and also returned to the transmission source segment 10, the load terminal 11 belonging to the plurality of segments 10 operates according to the control command received later. The load terminals 11 belonging to the plurality of segments 10 can be operated as one group in the same operation state.

(Embodiment 2)
A second embodiment of the present invention will be described with reference to FIGS. Since the overall system configuration is the same as that of the first embodiment, common components are denoted by the same reference numerals, and illustration and description thereof are omitted.

  In the repeater 20 described in the first embodiment, when a control command for the same equipment load is transmitted from a plurality of control terminals 12 belonging to one to a plurality of segments 10 within a predetermined time, a control command received later is transferred to another While being transferred to the segment 10 and returned to the segment 10 that is the transmission source of the control command, in the present embodiment, the repeater 20 stores the control command transmitted immediately before in each segment 10 in the memory 24 (stored). In the relay processing unit 27, the control instruction to be transmitted next to each segment 10 is compared with the control contents of the control instruction stored in the memory 24. If the control contents are the same, the control instruction Has stopped sending.

Here, when the two segments 10 ₁ and 10 ₂ are controlled as one group, the transfer when the control commands are transmitted substantially simultaneously from the _two control terminals 12 ₁ and 12 ₂ belonging to one segment 10 _1. The processing will be described with reference to FIGS.

First, when the control terminal 12 _first segment 10 ₁ user performs an OFF operation using the switch 14, the CPU12c control terminal 12 _1, depending on the OFF operation of the switch 14, the multicast packet OFF control commands from the communication HW12a (S1 in FIGS. 4 and 5). At this time, the load terminal 11 of the same segment 10 ₁ receives the OFF control command sent from the control terminal 12 _1, turns off the lighting load (A1 in FIG. 5).

In the control terminal 12 ₁ as OFF operation is performed substantially at the same time, the other control terminal 12 ₂ belonging to the same segment 10 _1, when the user performs an ON operation using the switch 14, the control terminal 12 ₂ CPU 12c However, in response to the ON operation of the switch 14, the communication HW 12a transmits an ON control command as a multicast packet (S2 in FIGS. 4 and 5). At this time, the load terminal 11 of the same segment 10 ₁ receives ON control command sent from the control terminal 12 (S2), to light the lighting load (A2 in FIG. 5).

Incidentally, OFF control command transmitted by the above process S1 is received by the communication HW21 of the repeater 20 _1, the relay processing unit 27 of the repeater 20 ₁ to transmit the control command received from the communication HW22 bus 30 it is, to transfer the OFF control command to the other repeater 20 ₂ (FIG. 4, S3 in FIG. 5). Moreover, OFF control command transmitted by the processing S2 is also received by the communication HW21 of the repeater 20 _1, the relay processing unit 27 of the repeater 20 _1, transmits a control command received from the communication HW22 bus 30 It is to, to transfer the OFF control command to the other repeater 20 ₂ (FIG. 4, S4 in FIG. 5).

The repeater 20 _2, the above process S3, S4 sequentially transferred OFF control command from the repeater 20 ₁ (S3), the communication of the ON control command (S4) HW22 receives, relay processing unit 27 has received OFF control command (FIG. 4, S5 in FIG. 5), ON control command (FIG. 4, S6 in FIG. 5) by transmitting the communication HW21 and other segment control command transmitted from one segment 10 ₁ It is transferred to the 10 _2. At this time, the load terminal 11 of the segment 10 _2, receives OFF control command transferred from the repeater 20 ₂ (S5), after once turns off the lighting load, it has been transferred again from the repeater 20 ₂ The ON control command (S6) is received, and the illumination load is turned on again (A3 in FIG. 5).

Given also the relay processing unit 27 of the repeater 20 _2, the timing at which the communication HW22 receives OFF control instructions (S3) from the repeater 20 _1, and the timing of receiving ON control instruction (S4) from the repeater 20 ₁ Since it is within the time, it is determined that the OFF control command of S3 and the ON control command of S4 are received substantially simultaneously. In this case, the ON control command (S4) received later is sent to the segment 10 _{1 of the} transmission source. Although as an attempt to return respect, the relay processing unit 27, a control command previously transmitted segment 10 within ₁ (S4 ON control command) is read from the memory 24, the control content of the control command then It is determined whether or not the control content of the control command to be transmitted (ON control command of S6) is the same. The result of this determination, if the different control content, to the operating state at the load terminal 11 belonging to a plurality of segments 10 in the same, the relay processing unit 27 returns the control command to the source of the segment 10 ₁ treatment Execute. On the other hand, the result of the determination, if the control content is the same, since there is no need to send continuously control commands of the same control content, the relay processing unit 27 sends back a control command to the segment 10 ₁ source processing The load terminals 11 belonging to the same group can be operated in the same operation state according to the control command received later while reducing communication traffic.

In the example of FIG. 4 and FIG. 5, the segment 10 ₁ and the control command previously transmitted (S4 ON control command), the control content of the control command (ON control command S6) to be next transmitted is identical since the relay unit 27 of the repeater 20 _2, the oN control command transmitted from the repeater 20 ₁ (S4), the process returns to the segment 10 ₁ side is stopped, while reducing the communication traffic The load terminals 11 of the segments 10 ₁ and 10 ₂ can be operated in the same operation state.

(Embodiment 3)
A third embodiment of the present invention will be described with reference to FIGS. Since the overall system configuration is the same as that of the first embodiment, common components are denoted by the same reference numerals, and illustration and description thereof are omitted.

  In the relay system of the first embodiment, the repeater 20 determines whether or not the signals are transmitted at substantially the same timing based on the timing at which the control command from each control terminal 12 is received. In the form, when each control terminal 12 transmits a control command, the current time information timed by the time measuring timer 12d is transmitted together with the control command, and a plurality of control commands are transmitted at substantially the same timing from this time information. It is determined whether it has been done. That is, when a control command is transmitted from the control terminal 12 of any segment 10, the repeater 20 performs a transfer process for transferring the control command to another segment 10 and belongs to one or more segments 10. When a control command for the same equipment load is transmitted from a plurality of control terminals 12, a plurality of control commands are transmitted within a predetermined time that can be regarded as simultaneous based on the transmission time information transmitted together with the control command. If it is determined whether it has been transmitted within a predetermined time, the control command received later is transferred to another segment 10 and is also returned to the segment 10 that is the source of the control command.

Here, transfer processing by the repeaters 20 ₁ and 20 ₂ will be described with reference to FIGS. 6 and 7 by taking _two segments 10 ₁ and 10 ₂ as an example. First, when a user segment 10 ₁ performs ON operation using the switch 14, CPU 12c of the control terminal 12, the current time information of the ON control command created, clock timer 12d has timed in response to the ON operation of the switch 14 Together with T1, the communication HW 12a transmits the multicast packet (S1 in FIGS. 6 and 7). At this time, the load terminal 11 of the same segment 10 ₁ receives the ON control command sent from the control terminal 12 turns on the lighting load (A1 in FIG. 7).

Substantially at the same timing as ON operation is performed by the segment 10 ₁ side, the user on the other segment 10 ₂ performs OFF operation using the switch 14, CPU 12c of the control terminal 12 belonging to the segment 10 _2, switch 14 The OFF control command created in response to the OFF operation is transmitted as a multicast packet from the communication HW 12a together with the current time information T2 timed by the timekeeping timer 12d (S2 in FIGS. 6 and 7). At this time, the load terminal 11 of the same segment 10 ₂ receives the OFF control command sent from the control terminal 12 turns off the lighting load (A2 in FIG. 7).

The above process ON control command transmitted in S1 is also received by the communication HW21 of the repeater 20 _1, the relay processing unit 27 of the repeater 20 _1, the ON control command and the current communication and the time information T1 HW22 received It is to send to the bus 30, to transfer oN control command and the current and time information T1 to another repeater 20 ₂ (FIG. 6, S3 in FIG. 7).

The OFF control command transmitted by the processing S2 is received by the communication HW21 of the repeater 20 _2, the communication relay processing unit 27 of the repeater 20 _2, and OFF control commands received and the current time information T2 HW22 from it to transmit to the bus 30, to transfer the OFF control command to the other repeater 20 ₁ (FIG. 6, S4 in FIG. 7). Segment repeater 20 _1, the OFF control command transmitted from the repeater 20 ₂ together with the time information T2, has been transmitted to the segments 10 ₁ side (FIG. 6, S6 in FIG. 7), it receives the OFF control command 10 ₁ of the load terminal 11, turns off the lighting load (A3 in Fig. 7).

Here, the repeater 20 _2, the time information of the OFF control command received from the control terminal 12 after transferring to the relay 20 _1, although receiving the ON control command transferred from the repeater 20 _1, these If the control command reception interval is within a predetermined time window, both segments 10 ₁ , 10 are based on the time information T2 sent together with the OFF control command and the time information T1 sent together with the ON control command. It is determined whether or not a control command has been transmitted from the _two control terminals 12 within a predetermined time that can be regarded as substantially simultaneous. In addition, in a system in which the terminals of each segment 10 are connected with two or fewer relays and the maximum communication distance of each segment 10 is defined as 500 m, the signal transmitted simultaneously reaches the repeater 20 with a certain signal. The maximum delay time is estimated to be about 2.5 (μS), and the above time window may be set to a time comparable to this maximum delay time.

In the above determination, based on the time information T2 sent together with the OFF control command and the time information T1 sent together with the ON control command, the control terminals 12 of both segments 10 ₁ , 10 ₂ are almost simultaneously. If the control command within a predetermined time is determined to have been transmitted can be regarded, repeater 20 _2, oN control instructions received later, with transfers to other segments 10 ₂ side, time information T1 the oN control command and returned to the relay 20 ₁ with (FIG. 6, S5 in FIG. 7), ON control command is sent back via the repeater 20 ₁ into segment 10 ₁ side (FIG. 6, S7 in Fig. 7). At this time, along with turning on the lighting load according to the load terminal 11 belonging to the segment 10 ₂ ON control command (A4 in Fig. 7), ON control command sent back to the relay 20 ₁ from the repeater 20 ₂ (S5) It is sent to the segment 10 ₁ side via the repeater 20 _1, the load terminal 11 belonging to the segment 10 ₁ turns on the lighting load based on the oN control command (A5 in Figure 7). Also in the repeater 20 _1, after receiving ON control instruction (S1) from the control terminal 12 belonging to the segment 10 _1, although received OFF control instructions (S4) transferred from the repeater 20 _2, ON control reception interval of the instruction (S1) and an OFF control command (S4) is longer than the time window, the repeater 20 _1, OFF control command and (S4) and ON control command (S1) is transmitted simultaneously No determination is made as to whether or not the command is a control command.

  As described above, in the repeater 20, when a control command for the same equipment load (load terminal 11) is transmitted from a plurality of control terminals 12, which control command is determined based on the time information received together with the control command. It is possible to determine whether it has been received later, and since the control command received later is transmitted to the other segment 10 and is also returned to the source segment 10, the load terminals 11 belonging to the plurality of segments 10 are later It can be operated in the same operation state according to the control content of the received control command.

(Embodiment 4)
A fourth embodiment of the present invention will be described with reference to FIGS. Since the overall system configuration is the same as that of the first embodiment, common components are denoted by the same reference numerals, and illustration and description thereof are omitted.

  In the relay system of the present embodiment, time information is transmitted together with the control command from the control terminal 12 as in the relay system described in the third embodiment, and the repeater 20 has a plurality of control terminals belonging to one to a plurality of segments 10. 12, when a control command for the same equipment load is transmitted, based on the transmission time information transmitted together with the control command, whether or not a plurality of control commands are transmitted within a predetermined time that can be regarded as simultaneous. If it is determined that the control commands are transmitted at the same time, the control command received later is transferred to another segment 10 and also returned to the segment 10 that is the source of the control command. Furthermore, in this embodiment, when the repeater 20 determines that the control command has been transmitted at the same time, if the control command received earlier is not transferred, the control command is transferred to another segment 10. Stop processing.

Here, transfer processing by the repeaters 20 ₁ and 20 ₂ will be described with reference to FIGS. 8 and 9 by taking _two segments 10 ₁ and 10 ₂ as an example. First, when a user segment 10 ₁ performs ON operation using the switch 14, CPU 12c of the control terminal 12, the current time information of the ON control command created, clock timer 12d has timed in response to the ON operation of the switch 14 Along with T1, the communication HW 12a transmits the multicast packet (S1 in FIGS. 8 and 9). At this time, the load terminal 11 of the same segment 10 ₁ receives the ON control command sent from the control terminal 12 turns on the lighting load (A1 in FIG. 9).

Substantially at the same timing as ON operation is performed by the segment 10 ₁ side, the user on the other segment 10 ₂ performs OFF operation using the switch 14, CPU 12c of the control terminal 12 belonging to the segment 10 _2, switch 14 The OFF control command created in response to the OFF operation is sent from the communication HW 12a as a multicast packet together with the current time information T2 measured by the clock timer 12d (S2 in FIGS. 8 and 9). At this time, the load terminal 11 of the same segment 10 ₂ receives the OFF control command sent from the control terminal 12 turns off the lighting load (A2 in FIG. 9).

The above process ON control command transmitted in S1 is also received by the communication HW21 of the repeater 20 _1, the relay processing unit 27 of the repeater 20 _1, the ON control command and the current communication and the time information T1 HW22 received It is to send to the bus 30, to transfer oN control command and the current and time information T1 to another repeater 20 ₂ (Fig. 8, S3 of FIG. 9).

The OFF control command transmitted by the processing S2 is received by the communication HW21 of the repeater 20 _2, the communication relay processing unit 27 of the repeater 20 _2, and OFF control commands received and the current time information T2 HW22 from it to transmit to the bus 30, to transfer the OFF control command to the other repeater 20 ₁ (FIG. 8, S4 of FIG. 9).

Here, the repeater 20 _2, the time information of the OFF control command received from the control terminal 12 after transferring to the relay 20 _1, although receiving the ON control command transferred from the repeater 20 _1, these If the control command reception interval is within a predetermined time window, both segments 10 ₁ , 10 are based on the time information T2 sent together with the OFF control command and the time information T1 sent together with the ON control command. It is determined whether or not a control command has been transmitted from the _two control terminals 12 within a predetermined time that can be regarded as substantially simultaneous.

In the above determination, based on the time information T2 sent together with the OFF control command and the time information T1 sent together with the ON control command, the control terminals 12 of both segments 10 ₁ , 10 ₂ are almost simultaneously. regarded if the control instruction within a predetermined time is determined to have been transmitted, the repeater 20 ₂ outputs a transfer stop command to stop the transfer process of the OFF control command previously received to the relay unit 20 _1, the relay if not running a transfer process of the OFF control command upon receiving the vessel 20 in _one transfer stop command to stop the transfer process of the OFF control command (FIG. 8, S6 in FIG. 9).

The repeater 20 _2, both segments 10 _1, when the 10 _second control terminal 12 determines that it has received the control command within a predetermined time that can be regarded as substantially the same time, ON control instructions received later, other segments 10 ₂ as well as transferred to the side, and returned to the relay 20 ₁ the ON control command along with the time information T1 (FIG. 8, S5 in FIG. 9), is recirculated to the segment 10 ₁ side via the repeater 20 ₁ ( 8 and FIG. 9 S7). At this time, the load terminal 11 belonging to the segment 10 ₂ lights the lighting load based on the ON control command transferred via the repeater 20 ₂ (S5) (A4 in Fig. 9). The relay 20 ON control command sent back to the relay 20 ₁ from ₂ (S5) is transmitted to the segment 10 ₁ side via the repeater 20 _1, the load terminal 11 belonging to the segment 10 ₁ ON control command Based on the above, the lighting load is continuously turned on (A5 in FIG. 9). Accordingly, the load terminal 11 of each segment 10 _1, 10 _2, of the control instructions substantially simultaneously received by the repeater 20 _2, will be operated in the operating state in response to a control command received later, the same The load terminals 11 of the group can be operated in the same operation state.

Also in the repeater 20 _1, after receiving ON control instruction (S1) from the control terminal 12 belonging to the segment 10 _1, although received OFF control instructions (S4) transferred from the repeater 20 _2, ON control reception interval of the instruction (S1) and an OFF control command (S4) is longer than the time window, the repeater 20 _1, OFF control command and (S4) and ON control command (S1) is transmitted simultaneously No determination is made as to whether or not the command is a control command.

  As described above, when the control command is transmitted from the plurality of control terminals 12 belonging to one to a plurality of segments 10 at substantially the same timing, the relay processing unit 27 of the repeater 20 performs normal transfer processing and receives the control command. Since the control command received later is transferred to the other segment 10 and the control command received later is also returned to the segment 10 of the transmission source, it is received first for the segment 10 of the transmission source of the control command received later. Even if the process of relaying the control command is performed, the control command received earlier can be invalidated by returning the control command received later. In addition, when the relay processing unit 27 of the repeater 20 receives a plurality of control commands at a timing that can be regarded as substantially simultaneous, if the process of relaying the previously received control command is not performed, the relay of the control command is performed. Since the processing is stopped, it is possible to operate the load terminals 11 of the same group in the same operation state according to the control command received later while reducing the communication traffic.

(Embodiment 5)
A fifth embodiment of the present invention will be described with reference to FIGS. Since the overall system configuration is the same as that of the first embodiment, common components are denoted by the same reference numerals, and illustration and description thereof are omitted.

  In the relay system of the present embodiment, time information is transmitted together with the control command from the control terminal 12 as in the relay system described in the fourth embodiment, and the repeater 20 has a plurality of control terminals belonging to one to a plurality of segments 10. 12, when a control command for the same equipment load is transmitted, based on the transmission time information transmitted together with the control command, whether or not a plurality of control commands are transmitted within a predetermined time that can be regarded as simultaneous. If it is determined that the control commands are transmitted at the same time, the control command received later is transferred to another segment 10 and also returned to the segment 10 that is the source of the control command. Furthermore, in this embodiment, when the repeater 20 determines that the control command has been transmitted at the same time, if the control command received earlier is not transferred, the control command is transferred to another segment 10. When the processing is stopped and the transfer processing is stopped, the processing for returning the control command transmitted later from the other segment 10 to the other segment 10 is also stopped, thereby further reducing the communication traffic. I am trying.

Here, transfer processing by the repeaters 20 ₁ and 20 ₂ will be described with reference to FIGS. 8 and 9 by taking _two segments 10 ₁ and 10 ₂ as an example. First, when a user segment 10 ₁ performs ON operation using the switch 14, CPU 12c of the control terminal 12, the current time information of the ON control command created, clock timer 12d has timed in response to the ON operation of the switch 14 Along with T1, the communication HW 12a transmits the multicast packet (S1 in FIGS. 10 and 11). At this time, the load terminal 11 of the same segment 10 ₁ receives the ON control command sent from the control terminal 12 turns on the lighting load (A1 in FIG. 11).

Substantially at the same timing as ON operation is performed by the segment 10 ₁ side, the user on the other segment 10 ₂ performs OFF operation using the switch 14, CPU 12c of the control terminal 12 belonging to the segment 10 _2, switch 14 The OFF control command created in response to the OFF operation is sent from the communication HW 12a as a multicast packet together with the current time information T2 timed by the timekeeping timer 12d (S2 in FIGS. 10 and 11). At this time, the load terminal 11 of the same segment 10 ₂ receives the OFF control command sent from the control terminal 12 turns off the lighting load (A2 in FIG. 11).

The above process ON control command transmitted in S1 is also received by the communication HW21 of the repeater 20 _1, the relay processing unit 27 of the repeater 20 _1, the ON control command and the current communication and the time information T1 HW22 received It is to send to the bus 30, to transfer the oN control command and current time information T1 to another repeater 20 ₂ (S3 in FIG. 10, FIG. 11).

The OFF control command transmitted by the processing S2 is received by the communication HW21 of the repeater 20 _2, the communication relay processing unit 27 of the repeater 20 _2, and OFF control commands received and the current time information T2 HW22 from it to transmit to the bus 30, to transfer the OFF control command to the other repeater 20 ₁ (FIG. 10, S4 of FIG. 11).

Here, the repeater 20 _2, the time information of the OFF control command received from the control terminal 12 after transferring to the relay 20 _1, although receiving the ON control command transferred from the repeater 20 _1, these If the control command reception interval is within a predetermined time window, both segments 10 ₁ , 10 are based on the time information T2 sent together with the OFF control command and the time information T1 sent together with the ON control command. It is determined whether or not a control command has been transmitted from the _two control terminals 12 within a predetermined time that can be regarded as substantially simultaneous.

In the above determination, based on the time information T2 sent together with the OFF control command and the time information T1 sent together with the ON control command, the control terminals 12 of both segments 10 ₁ , 10 ₂ are almost simultaneously. regarded if the control instruction within a predetermined time is determined to have been transmitted, the repeater 20 ₂ outputs a transfer stop command to stop the transfer process of the OFF control command previously received to the relay unit 20 _1, the relay if not running a transfer process of the OFF control command upon receiving the vessel 20 in _one transfer stop command to stop the transfer process of the OFF control command (FIG. 8, S6 in FIG. 9).

The repeater 20 _2, both segments 10 _1, when the 10 _second control terminal 12 determines that it has received the control command within a predetermined time that can be regarded as substantially the same time, ON control instructions received later, other segments 10 ₂ as well as transferred to the side, and returns the ON control command along with the time information T1 to the relay 20 ₁ (FIG. 8, S5 in FIG. 9). At this time, the load terminal 11 belonging to the segment 10 ₂ lights the lighting load based on the ON control command (A4 in Fig. 11). Further, in the repeater 20 _1, if the previously transmitted OFF control command previously received a to segment 10 ₁ side, be returned to the source of the segment 10 ₁ side ON control command is sent back together with the time information T1 by, but disable the OFF control command, if the stop processing of transferring the OFF control command, the oN control command received after stopping the process for returning to the sender of the segment 10 _1.

Also in the repeater 20 _1, after receiving ON control instruction (S1) from the control terminal 12 belonging to the segment 10 _1, although received OFF control instructions (S4) transferred from the repeater 20 _2, ON control reception interval of the instruction (S1) and an OFF control command (S4) is longer than the time window, the repeater 20 _1, OFF control command and (S4) and ON control command (S1) is transmitted simultaneously No determination is made as to whether or not the command is a control command.

  As described above, when the control command is transmitted from the plurality of control terminals 12 belonging to one to a plurality of segments 10 at substantially the same timing, the relay processing unit 27 of the repeater 20 performs normal transfer processing and receives the control command. Since the control command received later is transferred to the other segment 10 and the control command received later is also returned to the segment 10 of the transmission source, it is received first for the segment 10 of the transmission source of the control command received later. Even if the process of relaying the control command is performed, the control command received earlier can be invalidated by returning the control command received later. In addition, when the relay processing unit 27 of the repeater 20 receives a plurality of control commands at a timing that can be regarded as substantially simultaneous, if the process of relaying the previously received control command is not performed, the relay of the control command is performed. Since the processing is stopped, it is possible to operate the load terminals 11 of the same group in the same operation state according to the control command received later while reducing the communication traffic. Further, when the relay unit 20 stops the relay process of the control command received earlier, the relay unit 20 also stops the process of returning the control command received later to the transmission source segment 10, thereby further reducing communication traffic. Can do.

(Embodiment 6)
A sixth embodiment of the present invention will be described with reference to FIGS. Since the overall system configuration is the same as that of the first embodiment, common components are denoted by the same reference numerals, and illustration and description thereof are omitted.

  In the relay system of the first embodiment, the repeater 20 determines whether or not the signals are transmitted at substantially the same timing based on the timing at which the control command from each control terminal 12 is received. In the embodiment, a sequence number is added to a control command transmitted in each segment 10, and each control terminal 12 has a sequence number SEQ (n-1) added to the control command transmitted last time in its own segment. ) And a new sequence number SEQ (n) obtained by adding a predetermined change (for example, +1) together with the control command. In the repeater 20, when a control command is transmitted from the control terminal 12 of any segment 10, the control command is transferred to the other segment 10, but a plurality of segments belonging to one to a plurality of segments 10 are transferred. When a control command for the same equipment load is transmitted from the control terminal 12 within a predetermined time window, if the sequence numbers transmitted together with the control command are the same, it is determined to be simultaneous control, and the control command received later is The control command is also returned to the source segment 10.

Here, transfer processing by the repeaters 20 ₁ and 20 ₂ will be described with reference to FIGS. 12 and 13 by taking _two segments 10 ₁ and 10 ₂ as an example. First, when a user segment 10 ₁ performs ON operation using the switch 14, CPU 12c of the control terminal 12, the ON control command generated in response to the ON operation of the switch 14, which is transmitted last in the segment 10 ₁ A multicast packet is transmitted from the communication HW 12a together with a new sequence number SEQ (n) obtained by adding 1 to the sequence number SEQ (n-1) of the control command (S1 in FIGS. 12 and 13). At this time, the load terminal 11 of the same segment 10 ₁ receives the ON control command sent from the control terminal 12 turns on the lighting load (A1 in FIG. 13).

Substantially at the same timing as ON operation is performed by the segment 10 ₁ side, the user on the other segment 10 ₂ performs OFF operation using the switch 14, CPU 12c of the control terminal 12 belonging to the segment 10 _2, switch 14 of the OFF control command created in response to the OFF operation, together with the segment 10 ₂ with a new sequence number SEQ obtained by adding 1 to the sequence number SEQ (n-1) of the control command transmitted last time (n) Then, a multicast packet is transmitted from the communication HW 12a (S2 in FIGS. 12 and 13). At this time, the load terminal 11 of the same segment 10 ₂ receives the OFF control command sent from the control terminal 12 turns off the lighting load (A2 in FIG. 13).

Said transmitted packet data processing S1 (including the ON control command and the sequence number SEQ (n)) is received by the communication HW21 of the repeater 20 _1, the relay processing unit 27 of the repeater 20 ₁ has received be to transmit the packet data from the communication HW22 bus 30, S3 of the packet data (including the oN control command and the sequence number SEQ (n)) is transferred to another repeater 20 ₂ (FIG. 12, FIG. 13 ).

Also, the transmitted packet data by the above process S2 (including OFF control command and the sequence number SEQ (n)) is received by repeater 20 ₂ communication HW21, repeater 20 ₂ of relay processing section 27, the received packet data from the communication HW22 be to send to the bus 30, the packet data (OFF control command and the sequence number SEQ including (n)) is transferred to another repeater 20 ₁ (FIG. 12, FIG. 13 S4). Repeater 20 _1, the packet data transmitted from the repeater 20 ₂ (including OFF control command and the sequence number SEQ (n)), have been transmitted to the segments 10 ₁ side (FIG. 12, S6 in FIG. 13) , the load terminal 11 of the segment 10 ₁ that has received the OFF control instruction, turns off the lighting load.

Here, the relay processing unit 27 of the repeater 20 _2, (OFF control command S2, S3 ON control command) segments ₁₀ 1, 10 control command ₂ from a plurality of control terminals 12 belonging to within the predetermined time window when receiving, OFF control command from the control terminal 12 belonging to the segment 10 ₂ and the additional sequence number SEQ (n) to (S2), oN control command from the control terminal 12 belonging to the other segments 10 ₁ (S3) comparing the appended sequence number SEQ (n), when both are determined to be the same sequence number SEQ (n), the control command received later (in this case, oN control of the segment 10 ₁ and return the instruction) to the source of the segment 10 ₁ (FIG. 12, S5 in FIG. 13), is recirculated to the segment 10 ₁ side via the repeater 20 ₁ ( S7 in FIG. 12 and FIG. At this time, ON control command sent back to the relay 20 ₁ from the repeater 20 ₂ (S5) is transmitted to the segment 10 ₁ side via the repeater 20 _1, the load terminal 11 belonging to the segment 10 ₁ ON control Since the lighting load is turned on based on the command (A4 in FIG. 13), the load terminals 11 of both segments 10 ₁ and 10 ₂ can be operated in the same operation state according to the control command transmitted later. .

Also in the repeater 20 _1, after receiving ON control instruction (S1) from the control terminal 12 belonging to the segment 10 _1, although received OFF control instructions (S4) transferred from the repeater 20 _2, ON control reception interval of the instruction (S1) and an OFF control command (S4) is longer than the time window, the repeater 20 _1, OFF control command and (S4) and ON control command (S1) is transmitted simultaneously No determination is made as to whether or not the command is a control command.

  As described above, in the repeater 20, when a control command for the same equipment load (load terminal 11) is transmitted from a plurality of control terminals 12, the control commands are simultaneously transmitted based on the sequence number received together with the control command. It is possible to determine whether or not they have been transmitted. If it is determined that they are transmitted simultaneously, the control command received later is transmitted to the other segment 10 and is also returned to the source segment 10. The load terminals 11 belonging to the segment 10 can be operated in the same operation state according to the control content of the control command received later.

In each embodiment described above, corresponding to each segment ₁₀ 1, 10 ₂ provided with a repeater ₂₀ 1, 20 _2, respectively, and connects between the repeater ₂₀ 1, 20 ₂ at bus 30, two repeater 20 _1, 20 ₂ by the segment 10 _1, 10 is performed transfer processing control commands between _2, a single repeater is connected directly to the bus 13 of each segment by one repeater Control command transfer processing may be performed between the segments 10 ₁ and 10 ₂ .

10 ₁ , 10 ₂ segment 11 Load terminal 12 Control terminal 13 Bus 20 ₁ , 20 ₂ Repeater

Claims (6)

A load terminal to control the equipment load in response to the control command input from the outside, the individual segments and the control terminal by which are connected via a bus for transmitting a control command to said load terminal is configured,
A plurality of said segments are connected via a repeater for relaying transmit control commands between said segments,
The relay, when either receiving a control command transmitted from the control terminal of said segment, and transfers the control command received to other of said segments, and, one to a plurality of belonging to a plurality of said segments within a predetermined time difference between the timing of receiving a control command for the same of the equipment load transmitted from the control terminal can be regarded as simultaneous time, the control command received after transferred to another of said segments, and, subsequently received equipment control for the relay system characterized by returning to the sender of the segment the control command. The repeater has storage means for storing a control command last transmitted by the control terminal or the repeater in each segment .
When the repeater receives a control command transmitted from the control terminal of any of the segments, the control content of the control command received this time is the control content of the control command stored in the storage means 2. The relay system for equipment control according to claim 1 , wherein if it is the same, the control command received this time is not transferred . A load terminal to control the equipment load in response to the control command input from the outside, the individual segments and the control terminal by which are connected via a bus for transmitting a control command to said load terminal is configured,
A plurality of said segments are connected via a repeater for relaying transmit control commands between said segments,
Each of the control terminal has a timer function for counting a present time, has been transmitted together with the control command transmission time information counted by the clock function,
The relay, when either receiving a control command transmitted from the control terminal of said segment, and transfers the control command received to other of said segments, and, one to a plurality of belonging to a plurality of said segments when receiving the control command for the same of the equipment load transmitted from the control terminal, on the basis of the transmission time information transmitted together with the control command, within a predetermined time in which a plurality of the control instructions can be regarded as simultaneous If you determined to have been transmitted, the control command is transferred to another of said segments received after, and, after the equipment control for the relay, characterized in that return to the source of the segment the control command received system. The relay, when receiving the control command for the same of the equipment load transmitted from a plurality of said control terminals belonging to different said segment, sending the control command from the plurality of the control terminal is within a predetermined time if not performing the control command transfer processing of the previously received when it is determined to have been, claims, characterized in that the stop processing of transferring the control command previously received the other of said segments 3. The relay system for equipment control according to 3. The relay, when stopping the processing of transferring the control command previously received the other of said segments, when receiving later the control command transmitted from the control terminal of the other of said segments, later 5. The relay system for equipment control according to claim 4, wherein the process of returning the received control command to the other segment is also stopped. A load terminal to control the equipment load in response to the control command input from the outside, the individual segments and the control terminal by which are connected via a bus for transmitting a control command to said load terminal is configured,
A plurality of said segments are connected via a repeater for relaying transmit control commands between said segments,
Each of the control terminals transmits a new sequence number obtained by adding a predetermined change to the sequence number added to the control command transmitted in the previous segment together with the control command,
The relay, when either receiving a control command transmitted from the control terminal of said segment, and transfers the control command received to other of said segments, and, one to a plurality of belonging to a plurality of said segments when receiving the control command for the same of the equipment load transmitted from the control terminal, the sequence number transmitted is determined to simultaneous control if the same with the control command received, the control command received after It was transferred to another of said segments, and, equipment control for the relay system characterized by returning to the sender of the segment the control command received later.

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