CN110554935B - Facility monitoring system and communication method in facility monitoring system - Google Patents
Facility monitoring system and communication method in facility monitoring system Download PDFInfo
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- CN110554935B CN110554935B CN201910450177.4A CN201910450177A CN110554935B CN 110554935 B CN110554935 B CN 110554935B CN 201910450177 A CN201910450177 A CN 201910450177A CN 110554935 B CN110554935 B CN 110554935B
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B23/00—Testing or monitoring of control systems or parts thereof
- G05B23/02—Electric testing or monitoring
- G05B23/0205—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults
- G05B23/0208—Electric testing or monitoring by means of a monitoring system capable of detecting and responding to faults characterized by the configuration of the monitoring system
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- G—PHYSICS
- G06—COMPUTING; CALCULATING OR COUNTING
- G06F—ELECTRIC DIGITAL DATA PROCESSING
- G06F11/00—Error detection; Error correction; Monitoring
- G06F11/07—Responding to the occurrence of a fault, e.g. fault tolerance
- G06F11/16—Error detection or correction of the data by redundancy in hardware
- G06F11/20—Error detection or correction of the data by redundancy in hardware using active fault-masking, e.g. by switching out faulty elements or by switching in spare elements
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
- H04L61/00—Network arrangements, protocols or services for addressing or naming
- H04L61/50—Address allocation
- H04L61/5007—Internet protocol [IP] addresses
Abstract
The present invention addresses the problem of providing a facility monitoring system and a communication method in the facility monitoring system, wherein a redundant structure can be adopted for a controller connected to a device in a facility in the facility monitoring system using BACnet. The monitoring system includes a monitoring device, a 1 st controller (11) and a 2 nd controller (12), at least 2 controllers are connected to each other via a BACnet, one of the 1 st controller (11) and the 2 nd controller (12) operates as a controller of a working system, the other operates as a controller of a standby system, a common virtual IP address is allocated to the 1 st controller (11) and the 2 nd controller (12), and the controller operating as the controller of the working system among the 1 st controller (11) and the 2 nd controller (12) communicates with the monitoring device (2) using the virtual IP address.
Description
Technical Field
The present invention relates to a facility monitoring system in which at least 2 controllers connected to devices installed in a facility and monitoring devices for monitoring or controlling the devices installed in the facility by the controllers are connected to each other via a BACnet (Building Automation and Control Network: building automation and control network), and a communication method in the facility monitoring system.
Background
Conventionally, there is known a technique for dividing a plurality of devices into a device of a working system and a device of a standby system and redundancy.
For example, patent document 1 discloses the following technique: in a server client system in which a client terminal and 2 servers are connected by a network, one server is set as a server of a working system, the other server is set as a server of a standby system, and when it is determined that an abnormality occurs in the servers of the working system, the server is switched so that the client terminal accesses the server of the standby system.
Prior art literature
Patent literature
Patent document 1: japanese patent laid-open publication No. 2010-9462
Disclosure of Invention
Problems to be solved by the invention
Conventionally, in a facility monitoring system in which a monitoring device monitors or controls a facility by a controller connected to the facility, a redundant structure such as that employed by a server in the related art represented by the technology disclosed in patent document 1 cannot be employed for the controller.
In a facility monitoring system, if a redundant structure used in a server in the related art is to be used for a controller, a monitoring device for monitoring or controlling the controller must have a function of determining which controller is a working system.
On the other hand, in a facility monitoring system, BACnet is commonly used, and for example, in BACnet, if a redundant configuration is desired for a controller, monitoring devices of other companies may be developed to have the above-described functions. However, it is difficult to develop products of other companies. In this way, when a redundant structure is adopted for the controllers of the own company, a situation occurs in which the controllers and monitoring devices of other companies become unable to communicate.
As described above, in particular, in a facility monitoring system using BACnet, there is a problem that a redundant structure cannot be adopted for a controller.
The present invention has been made to solve the above problems, and an object of the present invention is to provide a facility monitoring system and a communication method in the facility monitoring system, which can use a redundant structure for a controller connected to a device in a facility in the facility monitoring system using BACnet.
Technical means for solving the problems
The facility monitoring system according to the present invention includes a monitoring device, a 1 st controller, and a 2 nd controller, and at least 2 controllers are connected to each other via BACnet, and is characterized in that one of the 1 st controller and the 2 nd controller operates as a controller of an operation system, the other operates as a controller of a backup system, a common virtual IP address is assigned to the 1 st controller and the 2 nd controller, and the controller operating as the controller of the operation system among the 1 st controller and the 2 nd controller uses the virtual IP address to perform communication with the monitoring device.
ADVANTAGEOUS EFFECTS OF INVENTION
According to this invention, in the facility monitoring system using BACnet, a redundant configuration can be adopted for the controller connected to the devices in the facility.
Drawings
Fig. 1 is a diagram showing a configuration example of a facility monitoring system according to embodiment 1.
Fig. 2A and 2B are block diagrams showing configuration examples of the controller according to embodiment 1, fig. 2A shows a configuration example of the 1 st controller as a controller of the operation system, and fig. 2B shows a configuration example of the 2 nd controller as a controller of the standby system.
Fig. 3 is a flowchart for explaining an operation related to communication between the controller and the monitoring device in the facility monitoring system according to embodiment 1.
Fig. 4 is a flowchart for explaining the operation of the 2 nd controller as a backup system in the facility monitoring system according to embodiment 1.
Fig. 5 is a flowchart for explaining the operation of the 1 st controller as the operation system in the facility monitoring system according to embodiment 1.
Fig. 6 is a flowchart for explaining the operation of self-abnormality detection by the 1 st controller as the operation system in the facility monitoring system according to embodiment 1.
Detailed Description
Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Embodiment 1.
Fig. 1 is a diagram showing a configuration example of a facility monitoring system according to embodiment 1.
The facility monitoring system according to embodiment 1 is applied to, for example, a building monitoring system.
The facility monitoring system includes a 1 st controller 11, a 2 nd controller 12, and a monitoring device 2.
The 1 st controller 11, the 2 nd controller 12, and the monitoring apparatus 2 are connected via a network, and use BACnet as a communication network. With BACnet, for example, the monitoring device 2 manufactured by another company can be easily assembled into a facility monitoring system manufactured by the own company. In addition, BACnet is a known network communication protocol, and thus detailed description is omitted.
In the following description, the 1 st controller 11 and the 2 nd controller 12 are also collectively referred to simply as "controller 1".
Although not shown in fig. 1, the controller 1 may be connected to not only the monitoring device 2 but also a controller of another system, for example.
The controller 1 is connected to equipment (not shown) in a facility via a lower network, and monitors or controls the equipment based on the control of the monitoring device 2. The device means a sensor, a light, a switch, a motor, or the like, which are installed in a facility.
The controller 1 collects the measurement values acquired by the device from the device at a predetermined cycle.
In embodiment 1, the device monitored or controlled by the controller 1 is referred to as a monitoring point, and the measured value obtained at the monitoring point is referred to as monitoring point data.
The monitoring device 2 monitors or controls the controller 1. The monitoring device 2 monitors or controls the monitoring point by the controller 1. Specifically, for example, the monitoring device 2 acquires monitoring point data from the controller 1, and causes a display device (not shown) to display information related to the acquired monitoring point data. The manager or the like monitors or controls the monitoring point by checking the display device.
In the facility monitoring system, either the 1 st controller 11 or the 2 nd controller 12 operates as a controller of the working system, and the other operates as a controller of the backup system.
The 1 st controller 11 and the 2 nd controller 12 are assigned a common virtual IP address, and the controller 1 operating as a controller of the operating system among the 1 st controller 11 and the 2 nd controller 12 performs monitoring or control of the monitoring point by performing communication with the monitoring device 2 using the virtual IP address.
In the monitoring apparatus 2, a virtual IP address is stored as an IP address for communication with the controller 1.
The 1 st controller 11 and the 2 nd controller 12 monitor each other for survival, and switch which one of the controllers is the operation system.
The 1 st controller 11 and the 2 nd controller 12 have fixed addresses assigned to the respective controllers. The communication between the 1 st controller 11 and the 2 nd controller 12 may be performed using a fixed address.
The operation related to the communication between the controllers 1 and the monitoring device 2 and the operation related to the survival monitoring and switching between the controllers 1 will be described in detail later.
Fig. 2 is a block diagram showing an example of the configuration of the controller 1 according to embodiment 1.
In fig. 2, the 1 st controller 11 is a controller of the operation system, the 2 nd controller 12 is a controller of the standby system, fig. 2A shows a configuration example of the 1 st controller 11, and fig. 2B shows a configuration example of the 2 nd controller 12.
In fig. 2, for convenience of explanation, only the 1 st controller 11 and the 2 nd controller 12 are shown as a constituent part functioning when they are controllers of the operation system and a constituent part functioning when they are controllers of the standby system, but the 1 st controller 11 and the 2 nd controller 12 have substantially the same configuration. The 1 st controller 11 also has the constituent parts of the 2 nd controller 12 shown in fig. 2B, and the 2 nd controller 12 also has the constituent parts of the 1 st controller 11 shown in fig. 2A. In the following, the description will be given of the case where the 1 st controller 11 is a controller of the operation system and the 2 nd controller 12 is a controller of the standby system, but the 1 st controller 11 may be a controller of the standby system and the 2 nd controller 12 may be a controller of the operation system.
The controller 1 is executed by a software-based program process using a CPU (Central Processing Unit: central processing unit). In addition, the controller 1 has: an input interface device (not shown) and an output interface device (not shown) that communicate with external devices such as the other controller 1 and the monitoring device 2.
As shown in fig. 2A, the 1 st controller 11 includes a survival confirmation instruction receiving unit 111, a response transmitting unit 112, a communication control unit 113, a detecting unit 114, and a notifying unit 115.
The survival confirmation instruction receiving unit 111 receives a survival confirmation instruction transmitted from the 2 nd controller 12. In embodiment 1, the survival confirmation command is a command for monitoring whether or not an abnormality occurs in a controller of the operating system.
The response transmitting unit 112 transmits a response command to the 2 nd controller 12 in response to the survival confirmation command received by the survival confirmation command receiving unit 111.
The communication control unit 113 validates the virtual IP address. Specifically, the communication control unit 113 performs communication with the monitoring apparatus 2 using the virtual IP address. The communication control unit 113 transmits information for causing the monitoring apparatus 2 to communicate with the 1 st controller 11. Details are described below.
The detection unit 114 detects an abnormality of the 1 st controller 11 itself. The abnormality of the 1 st controller 11 itself is, for example, an abnormality of a communication function of the 1 st controller 11, a failure of software of the 1 st controller 11, or the like. The detection unit 114 may detect, for example, a situation in which the power supply of the 1 st controller 11 is about to be turned off as an abnormality.
When the detection unit 114 detects an abnormality of the 1 st controller 11 itself, the notification unit 115 notifies the 2 nd controller 12 of the occurrence of the abnormality.
As shown in fig. 2B, the 2 nd controller 12 includes a survival confirmation instruction transmitting unit 121, a response receiving unit 122, a switching unit 123, a communication control unit 124, and an alarm unit 125.
The survival confirmation instruction transmitting unit 121 transmits a survival confirmation instruction to the 1 st controller 11. The survival confirmation instruction transmitting unit 121 transmits a survival confirmation instruction at a predetermined cycle.
The response receiving unit 122 receives a response command from the 1 st controller 11 in response to the survival confirmation command transmitted by the survival confirmation command transmitting unit 121.
The switching unit 123 switches the controller 1 to operate itself (the 2 nd controller 12) as a controller of the operating system. The switching part 123 includes a 1 st switching part 1231 and a 2 nd switching part 1232.
When the response receiving unit 122 does not receive the response command, the 1 st switching unit 1231 determines that an abnormality has occurred in the 1 st controller 11, switches the controller 1 so that the 2 nd controller 12 is a controller of the operating system, and communicates with the monitoring apparatus 2 using the virtual IP address.
When the notification unit 115 of the 1 st controller 11 notifies that an abnormality has occurred in the 1 st controller 11, the 2 nd switching unit 1232 determines that an abnormality has occurred in the 1 st controller 11, and switches the controller 1 so that the 2 nd controller 12 is a controller of the operating system and communicates with the monitoring apparatus 2 using the virtual IP address.
In fig. 2B, the switching unit 123 is provided with the 1 st switching unit 1231 and the 2 nd switching unit 1232, but this is merely an example, and the switching unit 123 may be provided with either the 1 st switching unit 1231 or the 2 nd switching unit 1232.
When the switching unit 123 has switched the controller 1, the communication control unit 124 sets the virtual IP address to be valid, and performs communication with the monitoring apparatus 2 using the virtual IP address.
The communication control unit 124 transmits information for causing the monitoring apparatus 2 to communicate with the 2 nd controller 12, based on the control from the switching unit 123. Details are described below.
When the switching unit 123 has switched the controller 1, the alarm unit 125 outputs alarm information notifying the abnormality of the 1 st controller 11 to the monitoring device 2.
The operation of the controller 1 in the facility monitoring system according to embodiment 1 will be described.
In the following description of the operation, the description will be given of the case where the first 1 st controller 11 is a controller of the operation system and the second 2 nd controller 12 is a controller of the standby system.
First, an operation related to communication between the controller 1 and the monitoring device 2 in the facility monitoring system according to embodiment 1 will be described.
Fig. 3 is a flowchart for explaining operations related to communication between the controller 1 and the monitoring device 2 in the facility monitoring system according to embodiment 1.
When the controller 1 is started, the controller 1 determines whether or not it is a controller of the operating system (step ST 301).
In embodiment 1, which of the 1 st controller 11 and the 2 nd controller 12 is the controller of the operation system is determined by whether or not the operation system has been started up first, for example. Specifically, the controller 1 that is started first becomes a controller of the operating system. When the controller 1 is started, a control unit (not shown) transmits a confirmation signal to the other controller 1 as to whether or not to start. When the controller 1 of the other party receives the confirmation signal, a response signal for starting the content itself is transmitted to the controller 1 which transmits the confirmation signal. Among the controllers 1 that transmit the confirmation signal, the controller 1 that determines the other side starts earlier than itself, and the controller itself as the backup system starts. On the other hand, when the controller 1 of the other party is not activated, no response signal is transmitted. The controller 1 that transmits the confirmation signal determines that the controller 1 of the own comparison party is started first, and the controller itself is started as the controller of the working system.
The 2 nd controller 12 is the other controller 1 from the 1 st controller 11, and the 1 st controller 11 is the other controller 1 from the 2 nd controller 12.
In embodiment 1, for example, a manager or the like may appropriately determine which of the 1 st controller 11 and the 2 nd controller 12 is to be used as the controller of the operation system. In this case, the manager or the like starts the controller of the work system.
Here, since the 1 ST controller 11 is a controller of the operating system (in the case of yes in step ST 301), communication with the monitoring apparatus 2 is performed using the virtual IP address (step ST 302). Then, the 1 st controller 11 performs, for example, processing based on control from the monitoring device 2, or transmits, to the monitoring device 2, monitoring point data collected from the monitoring points, or the like. The 1 st controller 11 communicates with the monitoring point to monitor and control the monitoring point, collect monitoring point data, and the like.
The 1 st controller 11, which is a controller of the operation system, transmits information for causing the monitoring apparatus 2 to communicate with itself as an address of the controller 1. Specifically, for example, the communication control unit 113 of the 1 st controller 11 transmits GARP (Gratuitous Address Resolution Protocol: free address resolution protocol) to the monitoring apparatus 2 to update the ARP cache. When the monitor device 2 receives GARP, it updates the ARP table and sets the MAC address of the 1 st controller 11 to the IP address of the ARP table. Thus, the monitoring apparatus 2 can perform communication with the 1 st controller 11, which is a controller of the operating system, using the virtual IP address without being aware of the 1 st controller 11 or the 2 nd controller 12.
On the other hand, since the 2 nd controller 12 is a controller of the standby system (no in step ST 301), the virtual IP address is invalidated (step ST 303). That is, communication with the monitoring apparatus 2 is not performed.
Next, operations related to survival monitoring between the 1 st controller 11 and the 2 nd controller 12 and switching of controllers of the operation system in the facility monitoring system according to embodiment 1 will be described.
First, the operation of the 2 nd controller 12 as a controller of the backup system will be described.
Fig. 4 is a flowchart for explaining the operation of the 2 nd controller 12 as a backup system in the facility monitoring system according to embodiment 1.
The survival confirmation instruction transmitting section 121 stands by until a preset survival confirmation instruction transmitting time is reached (when no in step ST 401).
When the survival confirmation instruction transmission time has arrived (yes in step ST 401), the survival confirmation instruction transmission unit 121 transmits a survival confirmation instruction to the 1 ST controller 11 (step ST 402).
Then, the 2 nd controller 12 waits for receiving a response instruction from the 1 ST controller 11 in response to the survival confirmation instruction transmitted in step ST 402.
The response receiving unit 122 determines whether or not there is a response from the 1 ST controller 11 within the set time (step ST 403). Specifically, the response receiving unit 122 determines whether or not a response command to respond to the survival confirmation command transmitted from the survival confirmation command transmitting unit 121 in step ST402 has been received from the 2 nd controller 12 within the set time. The set time is set in advance.
When the response receiving unit 122 determines that there is a response within the set time (yes in step ST 403), it returns to step ST401.
When the response receiving unit 122 determines that there is no response within the set time (no in step ST 403), it outputs information notifying this to the switching unit 123.
The 1 ST switching unit 1231 of the switching unit 123 determines that an abnormality has occurred in the 1 ST controller 11, switches the controller 1 so that the 2 nd controller 12 is a controller of the operating system, and communicates with the monitoring device 2 using the virtual IP address (step ST 404).
At this time, the 1 st switching unit 1231 transmits information for causing the monitoring device 2 to communicate with the 2 nd controller 12 as the address of the controller 1 through the communication control unit 124. Specifically, for example, the communication control unit 124 transmits GARP (Gratuitous ARP) to the monitoring apparatus 2 to update the ARP cache based on the instruction from the 1 st switching unit 1231. When the monitor device 2 receives GARP, it updates the ARP table, and sets the MAC address of the 2 nd controller 12 to the virtual IP address of the ARP table. By this means, the communication control unit 124 validates the virtual IP address, and the monitoring device 2 can perform communication with the 2 nd controller 12 by using the 2 nd controller 12 as the controller of the operating system after the 2 nd controller 12 is switched to the 2 nd controller 12 without being aware of the controller of the operating system.
In step ST404, the 1 ST switching unit 1231 performs switching of the controller 1, and the communication control unit 124 transmits information for causing the monitoring device 2 to communicate with the 2 nd controller 12 to the monitoring device 2, so that when communication between the 2 nd controller 12 and the monitoring device 2 is established, the alarm unit 125 outputs alarm information notifying abnormality of the 1 ST controller 11 to the monitoring device 2 (step ST 405).
When the monitoring device 2 receives the alarm information, for example, a message such as "abnormality of the controller" is displayed on the display device. For example, the alarm information may include information on the cause of an abnormality such as a failure in communication or a power interruption, and the monitoring device 2 may cause the display device to display the information on the cause. The manager or the like can detect that some abnormality has occurred in the controller 1, and can quickly perform maintenance or the like of the controller 1.
As described above, the 2 nd controller 12 monitors the survival of the 1 st controller 11, and when it is determined that the 1 st controller 11 is abnormal, switches the controller 1 to be the controller of the operation system. Even if the controller 1 is switched, the monitoring apparatus 2 uses the virtual IP address for communication with the controller 1 as before the switching, and therefore, it is not necessary to recognize that the switching is performed.
The 1 st controller 11 functions as a controller of the backup system when restarting after recovery. Specifically, when the 1 st controller 11 is started, a confirmation signal of whether to start is sent to the 2 nd controller 12. Here, since the content of the acknowledgement signal transmission from the 2 nd controller 12 is a response signal in the startup, the 2 nd controller 11 determines itself as a controller of the standby system.
In this way, the 2 nd controller 12, which is switched to be the controller of the operating system, functions as the controller of the operating system after the 1 st controller 11 is restored. Thus, unnecessary switching of the controller 1 can be avoided.
In the explanation using fig. 4, when the response receiving unit 122 does not receive the response command within the set time, the survival confirmation command transmitting unit 121 may retry the transmission of the survival confirmation command a predetermined number of times.
Next, the operation of the 1 st controller 11, which is a controller of the operation system, will be described.
Fig. 5 is a flowchart for explaining the operation of the 1 st controller 11 as the operation system in the facility monitoring system according to embodiment 1.
As a precondition for the operation described in fig. 5, the 1 st controller 11 communicates with the monitoring apparatus 2 using the virtual IP address. Specifically, the communication control unit 113 performs communication with the monitoring apparatus 2 using the virtual IP address.
The survival confirmation instruction receiving unit 111 determines whether or not the survival confirmation instruction transmitted from the survival confirmation instruction transmitting unit 121 of the 2 nd controller 12 is received (step ST 501).
In step ST501, when the survival confirmation instruction is not received (no in step ST 501), step ST501 is repeated.
In step ST501, when the survival confirmation instruction is received (yes in step ST 501), the response transmitting unit 112 transmits a response instruction to the 2 nd controller 12 in response to the survival confirmation instruction received by the survival confirmation instruction receiving unit 111 in step ST501 (step ST 502).
In this way, survival monitoring is performed between the 1 st controller 11 and the 2 nd controller 12.
The facility monitoring system according to embodiment 1 does not need to include a device for detecting whether or not an abnormality has occurred in the controllers of the operation system in order to perform survival monitoring between the 1 st controller 11 and the 2 nd controller 12 which are redundant. In addition, when abnormality of the controller of the operating system is detected, switching of the controller 1 can be promptly performed.
In embodiment 1, the 1 st controller 11, which is a controller of the operation system, may detect occurrence of an abnormality itself and notify the 2 nd controller 12 of the abnormality, and will be described specifically below.
Fig. 6 is a flowchart for explaining the operation of self-abnormality detection by the 1 st controller 11 as the operation system in the facility monitoring system according to embodiment 1.
The detection unit 114 detects whether or not the 1 ST controller 11 itself has an abnormality (step ST 601).
In step ST601, when no abnormality occurs in itself (no in step ST 601), step ST601 is repeated.
In step ST601, when an abnormality occurs in itself (yes in step ST 601), the detection unit 114 outputs information indicating that an abnormality has occurred to the notification unit 115.
When the detection unit 114 detects an abnormality of the 1 ST controller 11 itself in step ST601, the notification unit 115 notifies the occurrence of the abnormality to the 2 nd controller 12 (step ST 602).
When the 2 nd controller 12 receives the notification of the occurrence of the abnormality of the 1 st controller 11, the 2 nd switching unit 1232 determines that the 1 st controller 11 has the abnormality, and switches the controllers 1. The specific operation of the switching of the controller 1 by the 2 nd switching unit 1232 is the same as the specific operation of the switching of the controller 1 by the 1 ST switching unit 1231 described in step ST404 of fig. 4, and therefore, the duplicate description is omitted.
In embodiment 1 above, the number of controllers 1 is 2, i.e., the 1 st controller 11 and the 2 nd controller 12, but this is only an example, and 3 or more controllers 1 may be connected to the network. In the facility monitoring system, the facility monitoring system may be configured to include at least 1 controller of the working system and at least 1 controller of the backup system redundant to the controller of the working system.
As described above, according to embodiment 1, in the facility monitoring system, the configuration is as follows: one of the 1 st controller 11 and the 2 nd controller 12 operates as a controller of the working system, and the other operates as a controller of the standby system, and a common virtual IP address is assigned to the 1 st controller 11 and the 2 nd controller 12; the 1 st controller 11 and the 2 nd controller 12 perform communication with the monitoring device 2 using the virtual IP address of the controller 1 operating as a controller of the operating system. When the 1 st controller 11 or the 2 nd controller 12 operates as a controller of the operating system, the monitoring device 2 communicates using the virtual IP address, and therefore, it is not necessary to recognize which is the controller of the operating system. Therefore, the monitoring device 2 does not need to have a function of determining which controller 1 is the operation system. Thus, in the facility monitoring system using BACnet, a redundant configuration can be adopted for the controller 1 connected to the devices in the facility.
The controller of the working system is configured to include: a survival confirmation instruction receiving unit 111 that receives a survival confirmation instruction transmitted from the controller of the standby system; and a response transmitting unit 112 that transmits a response command that responds to the survival confirmation command received by the survival confirmation command receiving unit 111, the controller of the standby system is configured to include: a survival confirmation instruction transmitting unit 121 that transmits a survival confirmation instruction to a controller of the operating system; a response receiving unit 122 that receives a response instruction from the controller of the operating system, the response instruction responding to the survival confirmation instruction transmitted by the survival confirmation instruction transmitting unit 121; and a switching unit 123 (1 st switching unit 1231) that, when the response receiving unit 122 does not receive the response instruction, performs switching of the controller 1 so as to set the controller of the standby system as the controller of the operating system, and communicates with the monitoring apparatus 2 using the virtual IP address.
The controller of the working system is configured to include: a detection unit 114 that detects an abnormality of the controller itself of the operating system; and a notification unit 115 for notifying the occurrence of an abnormality to the controller of the backup system when the detection unit 114 detects the abnormality, the controller of the backup system being configured to include: the switching unit 123 (the 2 nd switching unit 1232) performs the switching of the controller 1 described above when the occurrence of the abnormality is notified from the notification unit.
Therefore, the redundant controllers 1 do not need to be provided with a separate device for detecting whether or not an abnormality has occurred in the controllers of the operation system, and the redundant controllers 1 monitor each other for survival, so that the controllers 1 can be switched promptly when an abnormality has occurred in the controllers of the operation system.
The controller of the backup system is configured to include an alarm unit 125, and the alarm unit 125 outputs alarm information notifying abnormality of the controller of the operation system to the monitoring device 2 when the switching unit 123 has switched the controller 1. Therefore, the manager or the like can detect that some abnormality has occurred in the controller 1, and can promptly perform maintenance or the like of the controller 1.
The invention of the present patent application may be modified or omitted from any of the constituent elements of the embodiment within the scope of the invention.
[ description of the symbols ]
1. Controller for controlling a power supply
2. Monitoring device
11. No. 1 controller
12. 2 nd controller
111. Survival confirmation instruction receiving unit
112. Response transmitting unit
113. 124 communication control unit
114. Detection unit
115. Notification unit
121. Survival confirmation instruction transmitting unit
122. Response receiving unit
123. Switching part
125. Alarm unit
1231. 1 st switching part
1232. And a 2 nd switching part.
Claims (6)
1. A facility monitoring system that connects a monitoring device and at least 2 controllers including a 1 st controller and a 2 nd controller to each other via BACnet, characterized in that,
one of the 1 st controller and the 2 nd controller operates as a controller of a working system, the other operates as a controller of a standby system, a common virtual IP address is allocated to the 1 st controller and the 2 nd controller,
the controller of the 1 st controller and the controller of the 2 nd controller that operates as a controller of the operating system perform communication with the monitoring device using the virtual IP address,
when one of the 1 st controller and the 2 nd controller is started, a confirmation signal is sent to the other controller to judge whether the other controller is started,
when the other party controller receives the confirmation signal and transmits a response signal of the content of self-starting to the one party controller, the other party controller judges that the other party controller starts before the other party controller starts, and the other party controller starts as a controller of a standby system; on the other hand, when the other controller is not activated and does not transmit the response signal, the one controller determines that the other controller is activated earlier than the other controller, and the other controller is activated as a controller of the operating system.
2. The facility monitoring system of claim 1, wherein,
the controller of the working system is provided with:
a survival confirmation instruction receiving unit that receives a survival confirmation instruction transmitted from a controller of the backup system; and
a response transmitting unit configured to transmit a response command in response to the survival confirmation command received by the survival confirmation command receiving unit,
the controller of the backup system is provided with:
a survival confirmation instruction transmitting unit that transmits the survival confirmation instruction to a controller of the operating system;
a response receiving unit that receives, from a controller of the operating system, the response instruction that responds to the survival confirmation instruction transmitted by the survival confirmation instruction transmitting unit; and
and a switching unit that switches the controller so that the controller of the backup system is a controller of the working system and communicates with the monitoring device using the virtual IP address when the response receiving unit does not receive the response command.
3. The facility monitoring system of claim 1 or 2, wherein,
the controller of the working system is provided with:
a detection unit that detects an abnormality of a controller itself of the operating system; and
a notification unit configured to notify a controller of the backup system of occurrence of the abnormality when the detection unit detects the abnormality,
the controller of the backup system includes a switching unit that switches the controller so that the controller of the backup system is a controller of the operating system and communicates with the monitoring device using the virtual IP address when the occurrence of the abnormality has been notified from the notifying unit.
4. The facility monitoring system of claim 2, wherein,
the controller of the backup system includes an alarm unit that outputs alarm information notifying abnormality of the controller of the working system to the monitoring device when the switching unit has performed switching of the controllers.
5. The facility monitoring system of claim 3 wherein,
the controller of the backup system includes an alarm unit that outputs alarm information notifying abnormality of the controller of the working system to the monitoring device when the switching unit has performed switching of the controllers.
6. A communication method in a facility monitoring system that connects a monitoring device and at least 2 controllers including a 1 st controller and a 2 nd controller to each other via BACnet, the communication method in the monitoring system characterized in that,
one of the 1 st controller and the 2 nd controller operates as a controller of a working system, the other operates as a controller of a standby system, a common virtual IP address is allocated to the 1 st controller and the 2 nd controller,
the controller of the 1 st controller and the controller of the 2 nd controller that operates as a controller of the operating system perform communication with the monitoring device using the virtual IP address,
when one of the 1 st controller and the 2 nd controller is started, a confirmation signal is sent to the other controller to judge whether the other controller is started,
when the other party controller receives the confirmation signal and transmits a response signal of the content of self-starting to the one party controller, the other party controller judges that the other party controller starts before the other party controller starts, and the other party controller starts as a controller of a standby system; on the other hand, when the other controller is not activated and does not transmit the response signal, the one controller determines that the other controller is activated earlier than the other controller, and the other controller is activated as a controller of the operating system.
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| JP2018104878A JP7220997B2 (en) | 2018-05-31 | 2018-05-31 | FACILITY MONITORING SYSTEM AND COMMUNICATION METHOD IN FACILITY MONITORING SYSTEM |
| JP2018-104878 | 2018-05-31 |
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