CN110554935A - 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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- CN110554935A CN110554935A CN201910450177.4A CN201910450177A CN110554935A CN 110554935 A CN110554935 A CN 110554935A CN 201910450177 A CN201910450177 A CN 201910450177A CN 110554935 A CN110554935 A CN 110554935A
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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 that uses BACnet and that can employ a redundant structure for a controller that connects devices within a facility, and a communication method in the facility monitoring system. 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 an operating system, the other operates as a controller of a standby system, a common virtual IP address is assigned to the 1 st controller (11) and the 2 nd controller (12), and a controller of the 1 st controller (11) and the 2 nd controller (12) that operates as a controller of the operating system 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 a monitoring apparatus 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), and a communication method in the facility monitoring system.
Background
Conventionally, a technique is known in which a plurality of devices are divided into a device of an active system and a device of a standby system, and are redundant.
For example, patent document 1 discloses the following technique: in a server-client system in which a client terminal and 2 servers are connected to each other via a network, one server is a server of a working system and the other is a server of a backup system, and when it is determined that an abnormality occurs in the server of the working system, server switching is performed such that the client terminal accesses the server of the backup system.
Documents of the prior art
Patent document
Patent document 1: japanese patent application laid-open No. 2010-9462
Disclosure of Invention
Problems to be solved by the invention
conventionally, in a facility monitoring system in which a monitoring apparatus monitors or controls a facility by a controller connected to the facility, a redundant structure such as that employed in a server in the related art represented by the technology disclosed in patent document 1 cannot be employed for the controller.
In the facility monitoring system, when a redundant structure used in a server in the related art is used for a controller, a monitoring device that monitors or controls the controller must have a function of determining which controller is a working system.
On the other hand, BACnet is commonly used in a facility monitoring system, and for example, in BACnet, if a redundant structure is adopted for a controller, some development may be made for a monitoring device of another company so as to have the above-described function. However, it is difficult to develop products of other companies. In this way, when the controller of the own company is configured to be redundant, the controller and the monitoring device of another company may not communicate with each other.
As described above, in particular, in the facility monitoring system using BACnet, there is a problem that a redundant structure cannot be adopted for the controller.
The present invention has been made to solve the above-described 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 adopt a redundant structure for a controller connected to a device in a facility in the facility monitoring system using BACnet.
Means for solving the problems
A 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 operating system, and the other operates as a controller of a standby system, and common virtual IP addresses are assigned to the 1 st controller and the 2 nd controller, and a controller operating as a controller of the operating system among the 1 st controller and the 2 nd controller performs communication with the monitoring device using the virtual IP addresses.
ADVANTAGEOUS EFFECTS OF INVENTION
According to the present invention, in the facility monitoring system using BACnet, a redundant structure can be adopted for the controller connected to the device in the facility.
Drawings
Fig. 1 is a diagram showing an example of the configuration of a facility monitoring system according to embodiment 1.
Fig. 2A and 2B are block diagrams showing an example of the configuration of the controller according to embodiment 1, fig. 2A shows an example of the configuration of the 1 st controller as the controller of the active system, and fig. 2B shows an example of the configuration of the 2 nd controller as the controller of the standby system.
Fig. 3 is a flowchart for explaining an operation related to communication between a controller and a 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 the 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 work system in the facility monitoring system according to embodiment 1.
Fig. 6 is a flowchart for explaining an operation of detecting a self-abnormality by the 1 st controller as the operating 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 drawings.
Embodiment 1.
fig. 1 is a diagram showing an example of the configuration 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, it is possible to easily incorporate the monitoring device 2 manufactured by another company into a facility monitoring system manufactured by the company itself. Since BACnet is a known network communication protocol, detailed description thereof is omitted.
In the following description, the 1 st controller 11 and the 2 nd controller 12 are collectively referred to simply as "controller 1".
Although not shown in fig. 1, the controller 1 may be connected to not only the monitoring apparatus 2 but also a controller of another system, for example.
The controller 1 is connected to a facility (not shown) via a lower network, and monitors or controls the facility based on control of the monitoring apparatus 2. The devices are sensors, lights, switches, motors, and the like, which are installed in the facility.
the controller 1 collects measurement values obtained by the plant from the plant at predetermined intervals.
in embodiment 1, the devices monitored or controlled by the controller 1 are referred to as monitoring points, and the measurement values obtained at the monitoring points are referred to as monitoring point data.
The monitoring device 2 monitors or controls the controller 1. The monitoring apparatus 2 monitors or controls a monitoring point by the controller 1. Specifically, for example, the monitoring device 2 acquires the 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 administrator or the like monitors or controls the monitoring point by confirming 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 the controller of the operating system of the 1 st controller 11 and the 2 nd controller 12 performs communication with the monitoring apparatus 2 using the virtual IP address to monitor or control the monitoring point.
The monitoring apparatus 2 stores a virtual IP address as an IP address for communicating with the controller 1.
The 1 st controller 11 and the 2 nd controller 12 monitor each other for existence and switch which controller becomes the operating system.
The 1 st controller 11 and the 2 nd controller 12 have fixed addresses assigned thereto. 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 communication between the controller 1 and the monitoring apparatus 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, it is assumed that the 1 st controller 11 is a controller of the working 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 components that function when the controller is the active system and only the components that function when the controller is the standby system are shown for the 1 st controller 11 and the 2 nd controller 12, respectively, but the 1 st controller 11 and the 2 nd controller 12 basically have the same configuration. The 1 st controller 11 also has the constituent elements of the 2 nd controller 12 shown in fig. 2B, and the 2 nd controller 12 also has the constituent elements of the 1 st controller 11 shown in fig. 2A. In the following, the description will be given of a case where the 1 st controller 11 is a controller of the working 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 working system.
The controller 1 is executed by a program process using a CPU (Central Processing Unit) based on software. Further, the controller 1 includes: an input interface device (not shown) and an output interface device (not shown) that communicate with external devices such as the other controllers 1 and the monitoring device 2.
As shown in fig. 2A, the 1 st controller 11 includes a survival confirmation command receiving unit 111, a response transmitting unit 112, a communication control unit 113, a detection unit 114, and a notification unit 115.
The survival confirmation command receiving unit 111 receives the survival confirmation command transmitted from the 2 nd controller 12. In embodiment 1, the survival confirmation command is a command for monitoring whether or not a controller of the work system is abnormal.
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 communicating with the 1 st controller 11 to the monitoring apparatus 2. The details will be described later.
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 provided in the 1 st controller 11, a failure of software of the 1 st controller 11, or the like. The detection unit 114 may detect that the power supply of the 1 st controller 11 is about to be turned off as an abnormality, for example.
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 command 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 command transmitting unit 121 transmits the survival confirmation command to the 1 st controller 11. The survival confirmation command transmitting unit 121 transmits the survival confirmation command 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 unit 123 includes a 1 st switching unit 1231 and a 2 nd switching unit 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, 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.
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 includes 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 include 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 validates the virtual IP address and performs communication with the monitoring apparatus 2 using the virtual IP address.
The communication control unit 124 transmits information for communicating with the 2 nd controller 12 to the monitoring apparatus 2 based on the control from the switching unit 123. The details will be described later.
When the switching unit 123 has switched the controller 1, the alarm unit 125 outputs alarm information notifying an abnormality of the 1 st controller 11 to the monitoring apparatus 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 case where the 1 st controller 11 operates as a controller of the working system and the 2 nd controller 12 operates as a controller of the backup system will be described.
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 an operation 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 controller 1 of the 1 st controller 11 and the 2 nd controller 12 is the controller of the working system is determined, for example, by whether or not it is started first. Specifically, the controller 1 that is started first becomes a controller of the work system. When the controller 1 is activated, a control unit (not shown) transmits a confirmation signal for confirming whether or not the controller 1 is activated to the other controller. When the controller 1 of the other party receives the confirmation signal, a response signal for activating the controller 1 itself is transmitted to the controller 1 that transmitted the confirmation signal. In the controller 1 that transmits the acknowledgement signal, it is determined that the other controller 1 is activated earlier than itself, and that itself is activated as the controller of the backup system. On the other hand, when the counterpart controller 1 is not activated, no response signal is transmitted. The controller 1 that transmits the acknowledgement signal determines that it starts up earlier than the other controller 1, and starts up itself as the controller of the operating system.
In addition, the 2 nd controller 12 is the counterpart controller 1 as viewed from the 1 st controller 11, and the 1 st controller 11 is the counterpart controller 1 as viewed from the 2 nd controller 12.
In embodiment 1, for example, a manager or the like may appropriately determine which controller 1 of the 1 st controller 11 and the 2 nd controller 12 is to be used as the controller of the operating system. In this case, the administrator or the like first starts the controller of the work system.
Here, since the 1 ST controller 11 is a controller of the operating system (yes in step ST301), 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 apparatus 2, or transmits monitoring point data collected from a monitoring point to the monitoring apparatus 2. The 1 st controller 11 communicates with the monitoring points, and monitors and controls the monitoring points, collects data from the monitoring points, and the like.
The 1 st controller 11, which is a controller of the operating system, transmits information for communicating itself to the monitoring apparatus 2 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) to the monitoring apparatus 2, and updates the ARP cache. When receiving the GARP, the monitoring apparatus 2 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 communicate with the 1 st controller 11 as a controller of the operating system by 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 the controller of the standby system (in the case of no at step ST301), the virtual IP address is invalidated (step ST 303). That is, communication with the monitoring apparatus 2 is not performed.
Next, operations related to the survival monitoring between the 1 st controller 11 and the 2 nd controller 12 and the switching of the controllers of the operating system in the facility monitoring system according to embodiment 1 will be described.
First, the operation of the 2 nd controller 12 as the controller of the backup system will be described.
Fig. 4 is a flowchart for explaining the operation of the 2 nd controller 12 as the backup system in the facility monitoring system according to embodiment 1.
The survival confirmation command transmission unit 121 waits until the preset survival confirmation command transmission time is reached (no in step ST 401).
when the survival confirmation command transmission time is reached (yes in step ST 401), the survival confirmation command transmitting unit 121 transmits the survival confirmation command to the 1 ST controller 11 (step ST 402).
Then, the 2 nd controller 12 waits for reception of a response command from the 1 ST controller 11 in response to the survival confirmation command transmitted in step ST 402.
The response receiving unit 122 determines whether or not a response is present 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 is received from the 2 nd controller 12 within a set time period in response to the survival confirmation command transmitted by the survival confirmation command transmitting unit 121 in step ST 402. In addition, the set time is set in advance.
When determining that a response is present within the set time (yes in step ST403), the response receiving unit 122 returns to step ST 401.
When determining that there is no response within the set time (no in step ST403), the response receiving unit 122 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, and performs switching of 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 (step ST 404).
At this time, the 1 st switching unit 1231 transmits information for causing the monitoring apparatus 2 to communicate with the 2 nd controller 12 as the address of the controller 1 to the monitoring apparatus 2 through the communication control unit 124. Specifically, for example, the communication control unit 124 transmits garp (grapuitous ARP) to the monitoring apparatus 2 based on the instruction from the 1 st switching unit 1231, and updates the ARP cache. When receiving the GARP, the monitoring apparatus 2 updates the ARP table, and sets the MAC address of the 2 nd controller 12 to the virtual IP address of the ARP table. With this, the communication control unit 124 validates the virtual IP address, and the monitoring apparatus 2 can communicate with the 2 nd controller 12 by using the 2 nd controller 12 as the controller of the operating system without being aware of the switching of the controller of the operating system to the 2 nd controller 12.
in step ST404, the 1 ST switching unit 1231 switches the controller 1, and when the communication control unit 124 transmits information for communicating the monitoring device 2 with the 2 nd controller 12 to the monitoring device 2 and establishes communication between the 2 nd controller 12 and the monitoring device 2, the alarm unit 125 outputs alarm information for notifying an abnormality of the 1 ST controller 11 to the monitoring device 2 (step ST 405).
When the alarm information is received, the monitoring apparatus 2 causes the display apparatus to display a message such as "controller is abnormal", for example. For example, the alarm information may include information on a cause of an abnormality such as a failure in communication or a power cut, 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.
In this manner, the 2 nd controller 12 monitors the existence of the 1 st controller 11, and when it is determined that an abnormality has occurred in the 1 st controller 11, the controller 1 is switched to use itself as a controller of the operating 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, does not need to be aware that the switching is performed.
The 1 st controller 11 functions as a backup controller when it is restarted after recovery. Specifically, when the 1 st controller 11 is activated, a confirmation signal for confirming whether or not the activation is performed is transmitted to the 2 nd controller 12. Here, since the transmission content of the acknowledgement signal from the 2 nd controller 12 is a response signal in the start, the 2 nd controller 11 determines itself as the controller of the standby system.
In this way, the 2 nd controller 12 that has been switched to become the controller of the working system functions as the controller of the working system even after the 1 st controller 11 is restored. Thereby, unnecessary switching of the controller 1 can be avoided.
In the above description of fig. 4, the survival confirmation instruction transmitter 121 may retry transmission of the survival confirmation instruction a predetermined number of times when the response receiver 122 does not receive the response instruction within the set time.
Next, the operation of the 1 st controller 11 as a controller of the work system will be described.
Fig. 5 is a flowchart for explaining the operation of the 1 st controller 11 as the operating system in the facility monitoring system according to embodiment 1.
As a premise of the operation described in fig. 5, the 1 st controller 11 communicates with the monitoring apparatus 2 using a virtual IP address. Specifically, the communication control unit 113 performs communication with the monitoring apparatus 2 using the virtual IP address.
The survival confirmation command receiving unit 111 determines whether or not the survival confirmation command transmitted from the survival confirmation command transmitting unit 121 of the 2 nd controller 12 is received (step ST 501).
If the survival confirmation command is not received in step ST501 (no in step ST501), step ST501 is repeated.
When receiving the survival confirmation command in step ST501 (yes in step ST501), 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 in step ST501 (step ST 502).
In this way, the 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 separately include a device for detecting whether or not an abnormality occurs in the controllers of the operating system in order to monitor the existence of the redundant 1 st controller 11 and 2 nd controller 12. In addition, the controller 1 can be switched quickly when an abnormality in the controller of the operating system is detected.
In embodiment 1, the 1 st controller 11, which is a controller of the operating system, may detect the occurrence of an abnormality of itself and notify the 2 nd controller 12 of the abnormality, and the following description will be specifically made.
Fig. 6 is a flowchart for explaining an operation of detecting a self-abnormality by the 1 st controller 11 as the operating system in the facility monitoring system according to embodiment 1.
The detection unit 114 detects whether or not an abnormality has occurred in the 1 ST controller 11 itself (step ST 601).
If no abnormality occurs in step ST601 (no in step ST601), step ST601 is repeated.
in step ST601, when an abnormality occurs in itself (yes in step ST601), the detection unit 114 outputs information indicating the occurrence of the abnormality 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 2 nd controller 12 of the occurrence of the abnormality (step ST 602).
When the 2 nd controller 12 receives the notification of the occurrence of the abnormality in the 1 st controller 11, the 2 nd switching unit 1232 determines that the abnormality has occurred in the 1 st controller 11, and switches the controller 1. The specific operation of switching the controller 1 by the 2 nd switching unit 1232 is the same as the specific operation of switching the controller 1 by the 1 ST switching unit 1231 described in step ST404 of fig. 4, and therefore, a repetitive description thereof will be omitted.
In embodiment 1 described above, the number of the controllers 1 is 2, that is, the 1 st controller 11 and the 2 nd controller 12, but this is merely an example, and 3 or more controllers 1 may be connected to the network. 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 with the controller of the working system.
As described above, according to embodiment 1, the facility monitoring system is configured 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 common virtual IP addresses are assigned to the 1 st controller 11 and the 2 nd controller 12; of the 1 st controller 11 and the 2 nd controller 12, the controller 1 operating as a controller of the operating system performs communication with the monitoring apparatus 2 using a virtual IP address. When either the 1 st controller 11 or the 2 nd controller 12 operates as a controller of the work system, the monitoring apparatus 2 performs communication using the virtual IP address, and therefore, it is not necessary to recognize which controller is the controller of the work system. Therefore, the monitoring device 2 does not have to have a function of determining which controller 1 is the operating system. Therefore, in the facility monitoring system using BACnet, a redundant structure can be adopted for the controller 1 connected to the devices in the facility.
Further, the controller of the work system includes: an existence confirmation command receiving unit 111 that receives an existence confirmation command transmitted from a controller of the standby system; and a response transmitting unit 112 that transmits a response command in response to the survival confirmation command received by the survival confirmation command receiving unit 111, and the controller of the backup system includes: an existence confirmation command transmitting unit 121 that transmits an existence confirmation command to a controller of the work system; a response receiving unit 122 that receives a response command from the controller of the work system in response to the survival confirmation command transmitted by the survival confirmation command transmitting unit 121; and a switching unit 123 (a 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 that the controller of the standby system is set as the controller of the operating system, and communicates with the monitoring apparatus 2 using the virtual IP address.
Further, the controller of the work system includes: a detection unit 114 that detects an abnormality of the controller of the work system itself; and a notification unit 115 that notifies the controller of the backup system of occurrence of an abnormality when the detection unit 114 detects the abnormality, the controller of the backup system including: the switching unit 123 (the 2 nd switching unit 1232) performs the switching of the controller 1 described above when the notification unit notifies the occurrence of the abnormality.
Therefore, the redundant controllers 1 do not need to be separately provided with a device for detecting whether or not an abnormality occurs in the controllers of the operating system, and the redundant controllers 1 monitor the existence of each other, so that the controllers 1 can be quickly switched when an abnormality occurs in the controllers of the operating system.
The controller of the backup system is provided with an alarm unit 125, and when the switching unit 123 switches the controller 1, the alarm unit 125 outputs alarm information notifying an abnormality of the controller of the active system to the monitoring device 2. Therefore, 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.
in the invention of the present application, any component of the embodiment may be modified or omitted within the scope of the invention.
[ description of symbols ]
1 controller
2 monitoring device
11 st controller
12 nd 2 nd controller
111 survival confirmation command receiving unit
112 response transmitting part
113. 124 communication control unit
114 detection part
115 notification unit
121 survival confirmation command transmitting unit
122 response receiving part
123 switching part
125 alarm part
1231 st switching part
1232, 2 nd switching part.
Claims (6)
1. A facility monitoring system comprising a monitoring apparatus, a 1 st controller and a 2 nd controller, at least 2 controllers being connected to each other via a BACnet, the facility monitoring system being characterized in that,
One of the 1 st controller and the 2 nd controller operates as a controller of an active system, and the other operates as a controller of a standby system, and a common virtual IP address is assigned to the 1 st controller and the 2 nd controller,
A controller of the 1 st controller and the 2 nd controller, which operates as a controller of the operating system, performs communication with the monitoring apparatus using the virtual IP address.
2. The facility monitoring system of claim 1,
The controller of the work system includes:
An existence confirmation command receiving unit that receives an existence confirmation command transmitted from the controller of the standby system; and
A response transmitting unit that transmits a response command in response to the survival confirmation command received by the survival confirmation command receiving unit,
The controller of the backup system includes:
A survival confirmation instruction transmitting unit that transmits the survival confirmation instruction to a controller of the work system;
A response receiving unit that receives the response command from the controller of the work system, the response command being in response to the survival confirmation command transmitted by the survival confirmation command transmitting unit; and
And a switching unit that, when the response receiving unit does not receive the response instruction, switches the controller so that the controller of the backup system is set as the controller of the active system, and communicates with the monitoring apparatus using the virtual IP address.
3. Facility monitoring system according to claim 1 or 2,
The controller of the work system includes:
A detection unit that detects an abnormality of a controller of the work system; and
A notification unit configured to notify the 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, when the notification unit has notified the occurrence of the abnormality, switches the controller so that the controller of the backup system is a controller of the active system, and communicates with the monitoring apparatus using the virtual IP address.
4. The facility monitoring system of claim 2,
The controller of the backup system includes an alarm unit that outputs alarm information notifying an abnormality of the controller of the operating system to the monitoring device when the switching unit switches the controller.
5. the facility monitoring system of claim 3,
The controller of the backup system includes an alarm unit that outputs alarm information notifying an abnormality of the controller of the operating system to the monitoring device when the switching unit switches the controller.
6. A communication method in a facility monitoring system including a monitoring apparatus, a 1 st controller and a 2 nd controller, and at least 2 controllers are connected to each other via a BACnet, the communication method in the monitoring system being characterized in that,
One of the 1 st controller and the 2 nd controller operates as a controller of an active system, and the other operates as a controller of a standby system, and a common virtual IP address is assigned to the 1 st controller and the 2 nd controller,
A controller of the 1 st controller and the 2 nd controller, which operates as a controller of the operating system, performs communication with the monitoring apparatus using the virtual IP address.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2018-104878 | 2018-05-31 | ||
| JP2018104878A JP7220997B2 (en) | 2018-05-31 | 2018-05-31 | FACILITY MONITORING SYSTEM AND COMMUNICATION METHOD IN FACILITY MONITORING SYSTEM |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110554935A true CN110554935A (en) | 2019-12-10 |
| CN110554935B CN110554935B (en) | 2023-07-14 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201910450177.4A Active CN110554935B (en) | 2018-05-31 | 2019-05-28 | Facility monitoring system and communication method in facility monitoring system |
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| Country | Link |
|---|---|
| JP (1) | JP7220997B2 (en) |
| KR (1) | KR102278931B1 (en) |
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| CN110554935B (en) | 2023-07-14 |
| JP2019211836A (en) | 2019-12-12 |
| JP7220997B2 (en) | 2023-02-13 |
| KR102278931B1 (en) | 2021-07-19 |
| KR20190136997A (en) | 2019-12-10 |
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