WO2007097248A1

WO2007097248A1 - Transmission control device, equipment managing system and transmission control method

Info

Publication number: WO2007097248A1
Application number: PCT/JP2007/052814
Authority: WO
Inventors: Yasushi Yanagitani; Katsuji Oi
Original assignee: Daikin Industries, Ltd.
Priority date: 2006-02-23
Filing date: 2007-02-16
Publication date: 2007-08-30
Also published as: JP2007228234A

Abstract

A transmission control device (41) included in a first adapter (40) is comprised of a first receiving unit (42), a judgment unit (45) and a first transmitting unit (43). The first adapter (40) is connected with a second adapter (60) through a first network (10). In the first network (10), data are transmitted in response to instructions from the outside and, when the same priority data conflict each other, the data are transmitted again after a fixed period of time (T1). The first receiving unit (42) receives second transmitting data (D2) from the second adapter (60) through the first network (10). When the judgment unit (45) judges that an address (D23)of a source transmitter in the second transmitting data (D2) is overlapped with an address of the first adapter (40), the first transmitting unit (43) transmits spontaneously third transmitting data (D3) including an abnormality notifying signal (D34) of an address overlapping abnormality through the first network (10).

Description

Specification

Transmission control device, device management system, and transmission control method

Technical field

The present invention relates to a transmission control device, a device management system, and a transmission control method.

Background art

[0002] Conventionally, a technique has been proposed in which data is transmitted and received via a network of proprietary standards suitable for communication between equipment such as air conditioners (see, for example, Patent Document 1).

) o

Patent Document 1: Japanese Patent Application Laid-Open No. 2004-356935 (Page 1-19, Figure 1-13)

Disclosure of the invention

Problems to be solved by the invention

[0003] With the technology of Patent Document 1, even if the device wants to know whether an address duplication error has occurred, an external command (for example, a power-on command, (from a centralized management device)) depends on the network specifications. As long as there is no status notification command, operation status change command, etc., there is a tendency that the data indicating the address duplication error is not transmitted. This may prevent other devices from detecting an address duplication error unless an external force command is issued to the device.

Further, in the technique of Patent Document 1, even when data indicating an address duplication abnormality is transmitted when there is a command from the outside (for example, a status notification command (from a centralized management device), etc.) The data may collide with data sent from other devices on the network. In that case, depending on the network specifications, data tends to be retransmitted at the same time after a fixed time elapses between the device and other devices. As a result, the data transmitted from the device and the data transmitted from another device tend to collide again on the network. Therefore, even if the data indicating the address duplication abnormality is transmitted from the device, the other device May not be able to detect an address duplication error.

[0004] An object of the present invention is to provide a transmission control device, a device management system, and a transmission that enable other devices to detect an address duplication error even if there is no external command to the device. It is to provide a control method.

Means for solving the problem

[0005] A transmission control device according to a first invention is a transmission control device included in a first device, and includes a reception unit, a determination unit, and a transmission unit. The first device is connected to the second device via the first network. The first network is a network to which data is transmitted in response to a command from the outside, and when data having the same priority collides, the data is retransmitted after the first time has elapsed. The first time is a fixed time. The receiving unit receives the second transmission data from the second device via the first network. The determination unit determines whether or not the transmission source address of the second transmission data overlaps with the address of the first device. When the determination unit determines that the transmission source address of the second transmission data overlaps with the address of the first device, the transmission unit voluntarily transmits the third transmission data via the first network. To do. The third transmission data includes an abnormality notification signal. The abnormality notification signal is a signal that informs of address duplication abnormality.

[0006] In this transmission control apparatus, the determination unit determines whether or not the transmission source address of the second transmission data overlaps with the address of the first device. The transmitting unit can receive information on whether or not the transmission source address of the second transmission data overlaps with the address of the first device. When the determination unit determines that the transmission source address of the second transmission data overlaps with the address of the first device, the transmission unit voluntarily transmits the third transmission data via the first network. Send. The third transmission data includes an abnormality notification signal. As a result, even if there is no external command to the first device, it is possible to notify the second device of an address duplication error.

In this way, even if there is no external force command for the device, other devices can detect an address duplication error.

[0007] The transmission control device according to the second invention is the transmission control device of the first invention or the second invention, wherein the transmission unit determines that the source address of the second transmission data is the address of the first device by the determination unit. If it is determined that they overlap, the third transmission data is periodically transmitted via the first network.

[0008] In this transmission control apparatus, the transmission unit uses the determination unit to transmit the source address of the second transmission data. If it is determined that the address overlaps with the address of the first device, the third transmission data is periodically transmitted via the first network. This allows the second device to be notified of address duplication abnormalities periodically.

In this way, when data that reports an address duplication error is sent from a device, it can be periodically notified to other devices, so that other devices can reliably detect an address duplication error. can do.

[0009] A transmission control device according to a third invention is the transmission control device according to the second invention, wherein the transmission unit has the transmission source address of the second transmission data overlapped with the address of the first device by the determination unit. If it is determined, the third transmission data is periodically transmitted via the first network at intervals of the second time. The second time is different from the first time.

[0010] In this transmission control apparatus, when the determination unit determines that the transmission source address of the second transmission data is duplicated with the address of the first device, the transmission unit transmits the first transmission via the first network. 3 Transmit data periodically at the second time interval. As a result, even if the third transmission data and the second transmission data collide on the first network, the third transmission data and the second transmission data are not transmitted from the first network in the next transmission timing. Collisions on the top can be reduced.

In this way, it is possible to reduce the collision between the third transmission data and the second transmission data on the first network, so that when data notifying the address duplication abnormality is transmitted from the device, the other device can address the address. Duplicate abnormalities can be detected more reliably.

[0011] A transmission control device according to a fourth invention is the transmission control device according to any one of the first to third inventions, wherein the transmission unit determines that the transmission source address of the second transmission data is the first by the determination unit. If it is determined that it is the same as the device address, the third transmission data is broadcasted via the first network.

[0012] In this transmission control device, when the determination unit determines that the transmission source address of the second transmission data overlaps with the address of the first device, the transmission unit transmits the first transmission via the first network. 3 Send transmission data in a broadcast manner. As a result, it is possible to notify the second device of an address duplication error without specifying the address of the second device.

In this way, when data notifying the address duplication abnormality is transmitted from the device, Since it is possible to notify other devices of an address duplication error without specifying the device address, it is possible for other devices to reliably detect an address duplication error.

[0013] A transmission control apparatus according to a fifth aspect of the present invention is the transmission control apparatus according to any one of the first to fourth aspects of the present invention, further comprising a determination unit and a release unit. The determination unit determines that an address duplication error has occurred when the determination unit determines that the source address of the second transmission data is duplicated with the address of the first device. When the cancellation unit determines that the normal period is the third time or more, the cancellation unit cancels the address duplication abnormality determined by the determination unit. The normal period is a period in which the determination unit determines that the transmission source address of the second transmission data overlaps with the address of the first device.

In this transmission control apparatus, the determination unit can receive information on whether or not the transmission source address of the second transmission data overlaps with the address of the first device. The determining unit determines that an address duplication abnormality has occurred when the determining unit determines that the source address of the second transmission data is duplicated with the address of the first device. Then, the canceling unit can also receive information on whether or not the transmission source address of the second transmission data overlaps with the address of the first device. The cancellation unit can determine whether the normal period is the third hour or more. When the cancellation unit determines that the normal period is the third time or more, it can determine that the address duplication error has been resolved, so it cancels the address duplication error determined by the decision unit.

In this way, when it can be determined that the address duplication error has been resolved, the address duplication error determined by the decision unit is canceled by the release unit, so the address duplication error must be cleared even if the device is not reset. Can do.

[0015] A device management system according to a sixth aspect of the present invention includes a first adapter, a second adapter, a centralized management device, a first facility device, and a second facility device. The first adapter has the transmission control device according to any of the first invention to the fifth invention. The first adapter is connected to the first network. The second adapter has the transmission control device according to any one of the first to fifth inventions. The second adapter is connected to the first adapter via the first network. The central management device is connected to the first adapter and the second adapter via the first network. The first equipment is connected to the first adapter via the second network. First 2 The equipment is connected to the second adapter via the third network. In this equipment management system, the first equipment is connected to the first adapter via the second network. Thereby, the information regarding the first equipment can be transmitted to the first adapter via the second network. The second equipment is connected to the second adapter via the third network. Thereby, the information regarding the 2nd equipment can be transmitted to the 2nd adapter via the 3rd network. The central management device is connected to the first adapter and the second adapter via the first network. As a result, the first adapter and the second adapter can be centrally managed, and the first equipment device and the second equipment device can be managed centrally via the first adapter and the second adapter. .

On the other hand, the determination unit of the first adapter determines whether or not the transmission source address of the second transmission data overlaps with the address of the first adapter. The transmission unit of the first adapter can receive from the determination unit information on whether or not the transmission source address of the second transmission data overlaps with the address of the first adapter. When the determination unit determines that the transmission source address of the second transmission data is the same as the address of the first adapter, the transmission unit of the first adapter transmits the third transmission via the first network. Send data voluntarily. The third transmission data includes an abnormality notification signal. As a result, even if there is no external command to the first adapter, it is possible to notify the second adapter of an address duplication error.

In this way, even if there is no external force command for the adapter, other adapters can detect an address duplication error.

[0017] A transmission control method according to a seventh aspect is a transmission control method performed in the first device, and includes a reception step, a determination step, and a transmission step. The first device is connected to the second device via the first network. The first network is a network to which data is transmitted in response to a command from the outside, and when data with the same priority collides, the data is retransmitted after the first time has elapsed. The first time is a fixed time. In the reception step, the second transmission data is received from the second device via the first network. In the determination step, it is determined whether or not the transmission source address of the second transmission data overlaps with the address of the first device. In the transmission step, the decision step If it is determined that the source address of the second transmission data overlaps with the address of the first device, the third transmission data is voluntarily transmitted via the first network. The third transmission data includes an abnormality notification signal. The abnormality notification signal is a signal that informs of address duplication abnormality.

[0018] In this transmission control method, in the determination step, it is determined whether or not the transmission source address of the second transmission data overlaps with the address of the first device. In the transmission step, information on whether or not the transmission source address of the second transmission data overlaps with the address of the first device can be received. In the transmission step, if it is determined in the determination step that the transmission source address of the second transmission data overlaps with the address of the i-th device, the third transmission data is voluntarily transmitted via the i-th network. Is done. As a result, the second device can be notified of an address duplication error even if there is no external command to the first device. In this way, even if there is no external force command for the device, other devices can detect an address duplication error.

The invention's effect

[0019] In the transmission control device according to the first aspect of the present invention, it is possible for other devices to detect an address duplication error even if there is no external command to the device.

[0020] In the transmission control device according to the second invention, when data notifying the address duplication abnormality is transmitted from the device, it is possible to periodically notify the other device of the address duplication abnormality. It is possible to reliably detect an address duplication abnormality.

[0021] In the transmission control device according to the third invention, it is possible to reduce the collision between the third transmission data and the second transmission data on the first network. When sent, other devices can more reliably detect address duplication errors.

[0022] In the transmission control device according to the fourth aspect of the present invention, when data notifying the address duplication abnormality is transmitted from the device, it is possible to inform the other device of the address duplication abnormality without specifying the address of the other device. Therefore, other devices can reliably detect an address duplication error.

[0023] In the transmission control device according to the fifth invention, it may be determined that the address duplication abnormality has been resolved. When possible, the address duplication error determined by the decision unit is cleared by the release unit, so the address duplication error can be cleared without resetting the device power S.

[0024] In the device management system according to the sixth aspect of the invention, even if there is no external force command for the adapter, other adapters can detect an address duplication error.

[0025] In the transmission control method according to the seventh aspect of the present invention, even if there is no external command to the device, other devices can detect an address duplication abnormality.

Brief Description of Drawings

FIG. 1 is a configuration diagram of a device management system according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of a first adapter in the embodiment of the present invention.

FIG. 3 is a configuration diagram of a second adapter in the embodiment of the present invention.

FIG. 4 is a flowchart showing a flow of processing in which transmission is controlled in the device management system.

FIG. 5 is a diagram showing a configuration of first transmission data.

FIG. 6 is a diagram showing a configuration of second transmission data.

FIG. 7 is a diagram showing a configuration of third transmission data.

FIG. 8 is a diagram showing a configuration of fourth transmission data.

FIG. 9 is a diagram showing the specifications of the first network.

FIG. 10 is a diagram showing timing when third transmission data is transmitted.

Explanation of symbols

[0027] 1 Device management system

10 First network

20 Second network

30 Third network

40 1st adapter

41 Transmission controller

42 First receiver

43 1st transmitter

45 Judgment part 50 1st equipment

60 Second adapter

61 Transmission controller

62 1st receiver

63 1st transmitter

65 Judgment part

68 Decision part

70 Second equipment

80 Administration Center

BEST MODE FOR CARRYING OUT THE INVENTION

FIG. 1 shows a configuration diagram of a device management system according to an embodiment of the present invention.

(Schematic configuration of device management system)

The device management system 1 mainly includes a management center 80, a first adapter 40, a first equipment device 50, a second adapter 60, a second equipment device 70, a first network 10, a second network 20, and a third network 30. .

The management center 80, the first adapter 40, and the second adapter 60 are connected to each other via the first network 10. Here, the first network 10 is a proprietary network suitable for communication between equipment. Specifically, according to the specifications of the first network 10, according to the command from the outside (for example, power-on command, status notification command (from the management center 80), operation status change command, etc.) The data is transmitted by the equipment. Further, in the first network 10, when data having the same priority transmitted with the device power collides, the data is retransmitted after the first time T1 (see FIG. 9) has elapsed.

The first adapter 40 and the first equipment device 50 are connected by the second network 20. The second adapter 60 and the second facility device 70 are connected by the third network 30.

(Schematic operation of device management system)

The first adapter 40 receives the twelfth information from the first equipment device 50 via the second network 20. Trust and remember. The twelfth information is information related to the first equipment device 50. The first adapter 40 stores eleventh information. The eleventh information is information about itself (first adapter 40).

The first adapter 40 had the 11th information and the 12th information received from the outside (for example, power-on command, status notification command (from the management center 80), operating status change command, etc.) In this case, the broadcast is transmitted via the first network 10 (specifying a broadcast address as a transmission destination).

[0030] Here, in the technology of Patent Document 1, unless there is an external command (for example, a power-on command, a status notification command (from the management center), an operation status change command, etc.), address duplication is performed. There is a tendency that data that informs the abnormality is not transmitted even by the first adapter.

On the other hand, in the present invention, since the first adapter 40 employs the configuration described later, even if there is no command from the outside, data notifying the address duplication abnormality is transmitted from the first adapter 40. It comes to be.

The management center 80 receives and stores eleventh information, twelfth information, etc. from the first adapter 40 via the first network 10 and manages them. Further, the management center 80 broadcasts necessary information (for example, a status notification command CI shown in FIG. 9) via the first network 10. The first adapter 40 receives the information. The first adapter 40 transmits the received information to the first equipment device 50 via the second network 20 as necessary.

The second adapter 60 and the second equipment device 70 are the same as the first adapter 40 and the first equipment device 50. The management center 80 receives and stores the 21st information and the 22nd information from the second adapter 60 via the first network 10 and manages them. The 21st information is information related to the second adapter 60. The 22nd information is information related to the second equipment device 70.

Thus, the management center 80 manages the first adapter 40 and the second adapter 60 centrally by managing the eleventh information and the twenty-first information. In addition, the management center 80 centrally manages the first equipment device 50 and the second equipment device 70 through the twelfth information and the twenty-second information.

(Detailed configuration and detailed operation of the first network) The first network 10 connects the management center 80, the first adapter 40, and the second adapter 60. The first network 10 is a proprietary network suitable for communication between equipment.

[0032] In the first network 10, all transmitted signals are transmitted in a broadcast manner.

For example, as shown in FIG. 9, when the second transmission data D2 (see FIG. 6) is transmitted from the second adapter 60, the second transmission data D2 is sent to the timing T Ml via the first network 10. In FIG. 2, the data is received by the management center 80 (see FIG. 1) and the first adapter 40.

In addition, according to the specifications of the first network 10, data is received in accordance with an external command (for example, a power-on command, a status notification command (from the management center 80), an operation status change command, etc.). Device power is also transmitted!

For example, when a status notification command CI is transmitted from the management center 80, the status notification command CI is received by the first adapter 40 and the second adapter 60 via the first network 10. The first adapter 40 sends the first transmission data D1 (see FIG. 5) including the eleventh information and the twelfth information to the first network 10 in response to the status notification command CI. The second adapter 60 sends the second transmission data D2 (see FIG. 6) including the 21st information and the 22nd information to the first network 10 in accordance with the status notification command CI.

[0033] Further, in the first network 10, when a plurality of pieces of data having the same priority transmitted with the device power collide, the data are retransmitted after the first time T1 has elapsed.

For example, the status notification command CI is received by the first adapter 40 and the second adapter 60 almost simultaneously at the timing immediately before the timing TM2. Thus, the first transmission data D1 transmitted from the first adapter 40 in response to the status notification command CI and the second transmission data D2 transmitted from the second adapter 60 in response to the status notification command CI are: At timing T M2, they are sent to the first network 10 almost simultaneously. For this reason, the first transmission data D1 and the second transmission data D2 collide on the first network 10, and since both have the same priority, both the first transmission data D1 and the second transmission data D2 are discarded. The Then, at the timing when the first time T1 has elapsed from the timing T M2, the first transmission data D1 and the second transmission data The data D2 is transmitted from the first adapter 40 and the second adapter 60, respectively. The first transmission data D1 and the second transmission data D2 collide again on the first network 10.

[0034] In the first network 10, even if a plurality of pieces of data that have been transmitted in the device capacity collide in the first network 10, if the priority of the data is different, the data with higher priority is preferentially transmitted. Therefore, data with a low priority is discarded. If the address is the same, the priority is the same. If the addresses are different, the priorities may be the same or the priorities may be different.

(Detailed configuration of the first adapter)

The first adapter 40 mainly includes a transmission control device 41 as shown in FIG. The transmission control device 41 mainly includes a first reception unit 42, a first transmission unit 43, a control unit 44, a determination unit 45, a determination unit 48, a release unit 49, a second reception unit 46, a second transmission unit 47, and a storage. Part 51.

The first receiver 42 and the first transmitter 43 are connected to the first network 10 and are also connected to the controller 44. The second receiver 46 and the second transmitter 47 are connected to the second network 20 and are also connected to the controller 44. The determination unit 45, the determination unit 48, the release unit 49, and the storage unit 51 are connected to the control unit 44.

[0035] (Detailed operation of the first adapter)

((Operation related to address duplication error))

The first receiver 42 receives the second transmission data D2 (see FIG. 6) from the second adapter 60 via the first network 10. Here, the second transmission data D2 is data transmitted from the second adapter 60 in a broadcast manner. The control unit 44 transfers the second transmission data D2 from the first reception unit 42 to the reception determination unit 45.

The determination unit 45 determines whether or not the transmission source address D23 (see FIG. 6) of the second transmission data D2 overlaps with the address of the first adapter 40. The first transmission unit 43 receives information from the determination unit 45 via the control unit 44 about whether or not the transmission source address D23 of the second transmission data D2 overlaps with the address of the first adapter 40. When the determination unit 45 determines that the transmission source address D23 of the second transmission data D2 is the same as the address of the first adapter 40, the first transmission unit 43 passes through the first network 10 and Third transmission data including error notification signal D34 Voluntarily transmit data D3 (see Fig. 7). At this time, the first transmission unit 43 transmits the third transmission data D3 in a broadcast manner.

On the other hand, the determination unit 48 receives information from the determination unit 45 via the control unit 44 whether or not the transmission source address D23 of the second transmission data D2 overlaps with the address of the first adapter 40. The determination unit 48 determines that an address duplication abnormality has occurred when the determination unit 45 determines that the source address D23 of the second transmission data D2 overlaps with the address of the first adapter 40. .

Further, the cancellation unit 49 receives information from the determination unit 45 via the control unit 44 whether or not the transmission source address D23 of the second transmission data D2 is duplicated with the address of the first adapter 40. The canceling unit 49 determines whether or not the normal period is not less than the third hour. Here, the normal period is a period in which the determination unit 45 determines that the transmission source address D23 of the second transmission data D2 does not overlap with the address of the first adapter 40. The third time is sufficient to determine that the address duplication error is resolved and stable. The canceling unit 49 cancels the address duplication abnormality determined by the determination unit 48 when determining that the normal period is the third time or more, that is, when determining that the address duplication abnormality is resolved.

[0037] ((Operations related to device management))

The second receiver 46 receives the twelfth information from the first equipment device 50 via the second network 20. Here, the twelfth information is information related to the first equipment device 50, for example, information indicating the operating state of the first equipment device 50. The second receiving unit 46 passes the twelfth information to the storage unit 51 via the control unit 44. The storage unit 51 stores twelfth information. Further, the storage unit 51 receives the eleventh information from the control unit 44 and stores it. Here, the eleventh information is information regarding the first adapter 40, for example, information regarding the operating state of the first adapter 40.

The first receiving unit 42 receives device management information (for example, a status notification command CI shown in FIG. 9) from the management center 80 via the first network 10. Here, the device management information is information necessary for management (monitoring 'control) of the first adapter 40 and the first facility device 50. The control unit 44 receives device management information from the first receiving unit 42. The control unit 44 generates an operation code D14 (see FIG. 5) including the eleventh information and the twelfth information according to the device management information and passes it to the second transmission unit 47. The second transmitter 47 transmits the first transmission data D including the operation code D14. 1 (see Fig. 5) is generated and transmitted via the first network 10 in a broadcast manner.

[0038] (Detailed configuration of the second adapter)

As shown in FIG. 3, the second adapter 60 mainly includes a transmission control device 61. The transmission control device 61 mainly includes a first reception unit 62, a first transmission unit 63, a control unit 64, a determination unit 65, a determination unit 68, a release unit 69, a second reception unit 66, a second transmission unit 67, and a storage. Part 71.

The first receiving unit 62 and the first transmitting unit 63 are connected to the first network 10 and are also connected to the control unit 64. The second receiving unit 66 and the second transmitting unit 67 are connected to the third network 30 and are also connected to the control unit 64. The determination unit 65, the determination unit 68, the release unit 69, and the storage unit 71 are connected to the control unit 64.

(Detailed operation of the second adapter)

((Operation related to address duplication error))

The first receiving unit 62 receives the first transmission data D1 (see FIG. 5) from the first adapter 40 via the first network 10. Here, the first transmission data D1 is data transmitted from the first adapter 40 in a broadcast manner. The control unit 44 receives the first transmission data D1 from the first reception unit 62 and passes it to the reception determination unit 65.

The determination unit 65 determines whether or not the transmission source address D13 (see FIG. 5) of the first transmission data D1 overlaps the address of the second adapter 60. The first transmission unit 63 receives information on whether or not the transmission source address D13 of the first transmission data D1 overlaps with the address of the second adapter 60 from the determination unit 65 via the control unit 64. When the determination unit 65 determines that the transmission source address D13 of the first transmission data D1 overlaps with the address of the second adapter 60, the first transmission unit 63 passes through the first network 10 and The fourth transmission data D4 (see Fig. 8) including the abnormality notification signal D44 is transmitted voluntarily. At this time, the first transmitter 63 transmits the fourth transmission data D4 in a broadcast manner.

On the other hand, the determination unit 68 receives information from the determination unit 65 via the control unit 64 whether or not the transmission source address D13 of the first transmission data D1 overlaps with the address of the second adapter 60. The determination unit 68 determines that an address duplication abnormality has occurred when the determination unit 65 determines that the source address D13 of the first transmission data D1 overlaps with the address of the second adapter 60. . In addition, the cancellation unit 69 receives information from the determination unit 65 via the control unit 64 whether or not the transmission source address D13 of the first transmission data D1 overlaps the address of the second adapter 60. The canceling unit 69 determines whether or not the normal period is not less than the third time. Here, the normal period is a period in which the determination unit 65 determines that the transmission source address D13 of the first transmission data D1 does not overlap with the address of the second adapter 60. The third time is sufficient to determine that the address duplication error is resolved and stable. The canceling unit 69 cancels the address duplication abnormality determined by the determination unit 68 when determining that the normal period is the third time or more, that is, when determining that the address duplication abnormality is resolved.

((Operations related to device management))

The second receiver 66 receives the 22nd information from the first equipment device 50 via the second network 20. Here, the 22nd information is information related to the second equipment device 70, for example, information indicating the operating state of the second equipment device 70. The second receiving unit 66 passes the twenty-second information to the storage unit 71 via the control unit 64. The storage unit 71 stores the twenty-second information. Further, the storage unit 71 receives the 21st information from the control unit 64 and stores it. Here, the 21st information is information regarding the second adapter 60, for example, information regarding the operating state of the second adapter 60.

The first receiving unit 62 receives device management information (for example, a status notification command CI shown in FIG. 9) from the management center 80 via the first network 10. Here, the device management information is information necessary for the management (monitoring 'control) of the second adapter 60 and the second facility device 70. The control unit 64 receives device management information from the first receiving unit 62. The control unit 64 generates an opcode D24 (see FIG. 6) including the 21st information and the 22nd information according to the device management information, and passes it to the second transmission unit 67. The second transmission unit 67 generates second transmission data D 2 (see FIG. 6) including the operation code D 24 and transmits it via the first network 10 in a broadcast manner.

(Detailed configuration of the first transmission data)

The first transmission data D1 is transmission data from the first adapter 40. As shown in FIG. 5, the first transmission data D 1 mainly includes synchronization information D11, transmission source address information D12, transmission destination address information D13, and opcode information D14.

[0042] The synchronization information D11 is information necessary to synchronize communication on the first network 10, and is placed at the head of the first transmission data D1. The destination address information D12 is information indicating an address on the first network 10 of a device that is a destination of the first transmission data Dl. Here, the destination address information D12 is normally a broadcast address.

The transmission source address information D 13 is information indicating the address on the first network 10 of the device that is the transmission source of the first transmission data D 1, and is the address of the first adapter 40. The operation code information D14 is information indicating an operation code and represents a predetermined instruction. As described above, the first transmission data D1 can be transmitted / received via the first network 10 because the synchronization information D11 is placed at the head. In addition, since the first transmission data D1 includes the source address information D13, it is possible to specify the data transmitted from which device! /.

[0043] (Detailed configuration of second transmission data)

The second transmission data D2 is transmission data from the second adapter 60. As shown in FIG. 6, the second transmission data D 2 mainly includes synchronization information D21, transmission source address information D22, transmission destination address information D23, and opcode information D24.

The synchronization information D21 is information necessary to synchronize communication on the first network 10, and is placed at the head of the second transmission data D2.

The transmission destination address information D22 is information indicating an address on the first network 10 of a device that is a transmission destination of the second transmission data D2. Here, the destination address information D22 is usually a broadcast address.

The transmission source address information D23 is information indicating the address on the first network 10 of the device that is the transmission source of the second transmission data D2, and is the address of the second adapter 60.

The operation code information D24 is information indicating the operation code, and represents a predetermined command! /.

As described above, the second transmission data D2 can be transmitted / received via the first network 10 since the synchronization information D21 is placed at the head. In addition, since the second transmission data D2 includes the source address information D23, it is possible to identify which device has transmitted the data! /.

(Detailed configuration of third transmission data)

The third transmission data D3 is transmission data from the first adapter 40. Third transmission data D As shown in FIG. 7, 3 mainly includes synchronization information D31, transmission destination address information D32, transmission source address information D33, and abnormality notification signal D34.

Synchronization information D31, destination address information D32 and source address information D33 are the same as synchronization information Dl1, destination address information D12 and source address information D1 3 (see FIG. 5) of first transmission data D1. .

[0045] The abnormality notification signal D34 is a signal notifying an address duplication abnormality, and has a flag indicating whether or not an address duplication abnormality has occurred and whether or not it is correct.

In this way, the third transmission data D3 can be transmitted / received via the first network 10 since the synchronization information D31 is placed at the head. In addition, since the third transmission data D3 includes the abnormality notification signal D34, it is possible to specify whether or not the address duplication abnormality has occurred by referring to it! / The

(Detailed configuration of the 4th transmission data)

The fourth transmission data D4 is transmission data from the second adapter 60. As shown in FIG. 8, the fourth transmission data D 4 mainly includes synchronization information D41, transmission destination address information D42, transmission source address information D43, and abnormality notification signal D44.

[0046] Synchronization information D41, destination address information D42, and source address information D43 are the same as synchronization information D21, destination address information D22, and source address information D2 3 (see FIG. 6) of second transmission data D2. It is.

The abnormality notification signal D44 is a signal for notifying an address duplication abnormality, and has a flag indicating whether or not an address duplication abnormality occurs and whether or not it is correct.

In this way, the fourth transmission data D4 can be transmitted / received via the first network 10 since the synchronization information D41 is placed at the head. In addition, since the fourth transmission data D4 includes the abnormality notification signal D44, it is possible to identify whether or not the address duplication abnormality has occurred by referring to it! /, The

(Processing flow for controlling transmission in the device management system)

The flow of processing in which transmission is controlled in the equipment management system will be described using the flow chart shown in Fig. 4. Here, a command with external force to the first adapter 40 (eg, power-on command, status notification command (from the management center), operating status change command, etc.) The case where there is no will be described. Although the case where the first adapter 40 receives data from the second adapter 60 will be described, the same applies to the case where the second adapter 60 receives data from the first adapter 40.

[0047] In step S1, it is determined whether or not there is reception of the second transmission data. That is, when the first transmission unit 42 of the first adapter 40 receives the second transmission data D2 (see FIG. 6) from the second adapter 60 via the first network 10, the second transmission data Receive D2. The control unit 44 receives the second transmission data D2 from the first reception unit 42 and passes it to the determination unit 45.

Then, the control unit 44 determines whether or not the second transmission data D2 is received by determining whether or not the second transmission data D2 is received from the first reception unit 42. When it is determined that the second transmission data D2 is received, the process proceeds to step S2, and when it is determined that the second transmission data D2 is not received, the process proceeds to step S1.

In step S2, it is determined whether or not the address is duplicated. That is, the determination unit 45 of the first adapter 40 determines whether or not the transmission source address D23 (see FIG. 6) of the second transmission data D2 overlaps with the address of the first adapter 40! / . If it is determined that the addresses are duplicated, the process proceeds to step S3. If it is determined that the addresses are not duplicated, the process proceeds to step S1.

[0048] In step S3, an address duplication abnormality is determined. That is, the determination unit 48 of the first adapter 40 receives information indicating that the source address D23 of the second transmission data D2 is duplicated with the address of the first adapter 40 via the control unit 44. Receive from 45. Then, the determination unit 48 determines that an address duplication abnormality has occurred based on information indicating that the source address D23 of the second transmission data D2 is duplicated with the address of the first adapter 40. To do.

In step S4, the third transmission data is transmitted. That is, the first transmission unit 43 of the first adapter 40 receives information indicating that the transmission source address D23 of the second transmission data D2 overlaps with the address of the first adapter 40 via the control unit 44. Receive from. The first transmitter 43 generates the third transmission data D3 (see FIG. 7) including the abnormality notification signal D34, and spontaneously transmits the third transmission data D3 via the first network 10. At this time, the first The transmitter 43 transmits the third transmission data D3 in a broadcast manner. In addition, the control unit 44 resets the elapsed time to 0 when the first transmission unit 43 transmits the third transmission data D3.

In step S5, it is determined whether or not there is a reception of the second transmission data. That is, when the first transmission unit 42 of the first adapter 40 receives the second transmission data D2 (see FIG. 6) from the second adapter 60 via the first network 10, the second transmission data Receive D2. The control unit 44 receives the second transmission data D2 from the first reception unit 42 and passes it to the determination unit 45.

Then, the control unit 44 determines whether or not the second transmission data D2 is received by determining whether or not the second transmission data D2 is received from the first reception unit 42. If it is determined that the second transmission data D2 is received, the process proceeds to step S6. If it is determined that the second transmission data D2 is not received, the process proceeds to step S7.

In step S6, it is determined whether or not the address is duplicated. That is, the determination unit 45 of the first adapter 40 determines whether or not the transmission source address D23 (see FIG. 6) of the second transmission data D2 overlaps with the address of the first adapter 40! / . If it is determined that the addresses are duplicated, the process proceeds to step S7. If it is determined that the addresses are not duplicated, the process proceeds to step S8.

[0050] In step S7, it is determined whether or not the force has passed for a second time since the transmission of the third transmission data by the first transmitter. That is, the control unit 44 of the first adapter 40 keeps counting elapsed time. Then, the control unit 44 compares the information on the elapsed time with the information on the second time T2 (see FIG. 10), and the transmission of the third transmission data D3 by the first transmission unit 43 is performed. Determine whether T2 has elapsed. Here, the second time T2 is a time different from the first time T1 (see FIG. 10). If it is determined that the second time T2 has elapsed, the process proceeds to step S4 and the elapsed time is reset to 0.If it is determined that V2 has elapsed after the second time T2, the process proceeds to step S5. It is done.

In step S8, it is determined whether or not the normal period is not less than the third time. That is, the release unit 49 of the first adapter 40 receives information indicating that the source address D23 of the second transmission data D2 is duplicated with the address of the first adapter 40 via the control unit 44. Receive from 45. Then, the canceling unit 49 sets the transmission source address D23 of the second transmission data D2 to the first key. In response to receiving the information indicating that it is duplicated with the address of adapter 40, the normal period starts to be counted. Here, the normal period is a period in which the determination unit 45 determines that the source address D23 of the second transmission data D2 overlaps with the address of the first adapter 40. The cancellation unit 49 compares the information of the normal period with the information of the third time, and determines whether or not the normal period is the third time or more. If it is determined that the normal period is greater than or equal to the third hour, the process proceeds to step S9. If it is determined that the normal period is not equal to or greater than the third time, the process proceeds to step S8.

[0051] In step S9, the address duplication error is canceled. That is, the cancellation unit 49 of the first adapter 40 cancels the address duplication abnormality determined by the determination unit 48.

(Features related to equipment management system)

(1)

Here, the determination unit 45 of the first adapter 40 determines whether or not the transmission source address D23 of the second transmission data D2 overlaps the address of the first adapter 40. The first transmission unit 43 receives information from the determination unit 45 via the control unit 44 whether or not the transmission source address D23 of the second transmission data D2 overlaps the address of the first adapter 40. When the determination unit 45 determines that the transmission source address D23 of the second transmission data D2 overlaps the address of the first adapter 40, the first transmission unit 43 passes the first network 10 to 3 Send data D3 voluntarily. The third transmission data D3 includes an abnormality notification signal D34. As a result, the second adapter 60 can be notified of an address duplication error even if there is no external force command to the first adapter 40.

[0052] In this way, even if there is no external force command for the adapter, other adapters can be instructed to detect an address duplication error!

(2)

Here, in the first network 10, when a plurality of data having the same priority transmitted from the devices collide, the data is retransmitted after the first time T1 has elapsed. On the other hand, when the determination unit 45 determines that the transmission source address D23 of the second transmission data D2 is duplicated with the address of the first adapter 40, the first transmission unit 43 of the first adapter 40 Via network 10, the third transmission data D3 is sent at intervals of the second time T2. Send periodically. Here, the second time T2 is different from the first time T1 (see FIG. 10). As a result, even if the third transmission data D3 and the second transmission data D2 collide on the first network 10, the third transmission data D3 and the second transmission data D2 are not transmitted at the next transmission timing. Collisions on the first network 10 are reduced (see Fig. 9 and Fig. 10).

[0053] As described above, since the collision between the third transmission data D3 and the second transmission data D2 on the first network 10 is reduced, the data (third transmission data D3) notifying the address duplication abnormality is reduced. When transmitted from the device (first adapter 40), the other device (second adapter 60) can reliably detect an address duplication error.

(3)

Here, the first transmission unit 43 of the first adapter 40 determines that the transmission unit address D23 of the second transmission data D2 is duplicated with the address of the first adapter 40 by the determination unit 45. The third transmission data D3 is broadcasted via 10. As a result, it becomes possible to notify the second adapter 60 of an address duplication error without specifying the address of the second adapter 60! /.

[0054] As described above, when the data (third transmission data D3) notifying the address duplication abnormality is transmitted from the device (first adapter 40), the address of the other device (second adapter 60) is designated. It is now possible to notify the other device (second adapter 60) of the address duplication error, so ensure that the other device (second adapter 60) detects the address duplication error. Now that you can!

(Four)

Here, the determination unit 48 of the first adapter 40 determines whether the transmission source address D23 of the second transmission data D2 overlaps the address of the first adapter 40 via the control unit 44. Receive from 45. The determination unit 48 determines that an address duplication error has occurred when the determination unit 45 determines that the transmission source address D23 of the second transmission data D2 is the same as the address of the first adapter 40. . Then, the canceling unit 49 receives information from the determining unit 45 via the control unit 44 that whether or not the transmission source address D23 of the second transmission data D2 is duplicated with the address of the first adapter 40! / . Then, the canceling unit 49 has a normal period of 3 hours or more. Judge whether there is a certain power. When the canceling unit 49 determines that the normal period is the third time or more, it determines that the address duplication abnormality has been resolved, and thus cancels the address duplication abnormality determined by the determining unit 48.

[0055] As described above, when it is determined that the address duplication abnormality has been resolved, the address duplication abnormality determined by the determination unit 48 is canceled by the cancellation unit 49, so that the device (first adapter 40) is reset. Even if not, the address duplication error is cleared.

Industrial applicability

[0056] The transmission control device, the device management system, and the transmission control method according to the present invention enable other devices to detect an address duplication error even if there is no external force command to the device. It has an effect and is useful as a transmission control device, a device management system, a transmission control method, and the like.

Claims

The scope of the claims

[1] A network in which data is transmitted in response to a command from an external force, and when data with the same priority collides, the data is retransmitted after a fixed first time has elapsed. A transmission control device (41, 61) of a first device (40, 60) connected to a second device (60, 40) via a first network (10),

A receiver (42, 62) for receiving the second transmission data via the first network (10), the second device (60, 40) force;

A determination unit (45, 65) for determining whether the transmission source address of the second transmission data overlaps with the address of the first device (40, 60)!

When the determination unit (45, 65) determines that the transmission source address of the second transmission data is the same as the address of the first device (40, 60), it passes through the first network (10). Therefore, the transmitter (43, 63) that voluntarily transmits the third transmission data including the abnormality notification signal that is a signal notifying the address duplication abnormality,

With

Transmission controller (41, 61).

[2] The transmission unit (43, 63) determines that the transmission source address of the second transmission data overlaps with the address of the first device (40, 60) by the determination unit (45, 65). The transmission control device (41, 61) according to claim 1, wherein the third transmission data is periodically transmitted via the first network (10) when the transmission is performed.

[3] The transmission unit (43, 63) determines that the transmission source address of the second transmission data overlaps the address of the first device (40, 60) by the determination unit (45, 65). The third transmission data is periodically transmitted at a second time interval that is different from the first time via the first network (10).

The transmission control device (41, 61) according to claim 2.

[4] The transmission unit (43, 63) determines that the transmission source address of the second transmission data overlaps with the address of the first device (40, 60) by the determination unit (45, 65). The transmission control device (41, 61) according to any one of claims 1 to 3, wherein the third transmission data is broadcasted via the first network (10). ).

[5] An address duplication error occurs when the judgment unit (45, 65) judges that the source address of the second transmission data is duplicated with the address of the first device (40, 60) A decision unit (48, 68) that decides what

The normal period, which is the period in which the determination unit (45, 65) determines that the source address of the second transmission data does not overlap with the address of the first device (40, 60), is a third period or more. A release unit (49, 69) for canceling the address duplication abnormality determined by the determination unit (48, 68) when it is determined that

Further equipped with,

The transmission control device (41, 61) according to any one of claims 1 to 4.

[6] A first adapter (40) having the transmission control device (41) according to any one of claims 1 to 5 and connected to the first network (10),

A second adapter (60) comprising the transmission control device (61) according to any one of claims 1 to 5 and connected to the first adapter (40) via the first network (10). And a centralized management device (80) connected to the first adapter (40) and the second adapter (60) via the first network (10)!

A first equipment device (50) connected to the first adapter (40) via a second network (20);

A second facility device (70) connected to the second adapter (60) via a third network (30);

With

Equipment management system (1).

[7] A network in which data is transmitted in response to an external command, and in which data is retransmitted after the first time, which is a fixed time, when data with the same priority collides. A transmission control method performed in a first device (40, 60) connected to a second device (60, 40) via a first network (10),

A receiving step in which the second device (60, 40) force second transmission data is received via the first network (10);

The source address of the second transmission data overlaps with the address of the first device (40, 60). Judgment step to judge whether or not the power is,

In the determination step, when it is determined that the transmission source address of the second transmission data is duplicated with the address of the first device (40, 60), it passes through the first network (10). A transmission step in which the third transmission data including the abnormality notification signal, which is a signal notifying the address duplication abnormality, is spontaneously transmitted;

With

Transmission control method.