JP2002232969A - Facility supervisory method and facility supervisory system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a facility supervisory system that can relieve a communication load so as to reduce a communication scan time. SOLUTION: A supervisory device 3 transmits an effective request message to obtain data transmission only when data being a supervisory object are changed to a controller 2, when data designated by the effective request message is changed, the controller 2 transmits a data change message including the data to the supervisory device 3 and the supervisory device 3 acquires data from the received data change message.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facility monitoring method and a facility monitoring system for monitoring a facility with a monitoring device through a controller for collecting data from a facility such as a building or a plant.

[0002]

2. Description of the Related Art Conventionally, in a facility monitoring system, data of each facility is collected by a controller, and the data collected by the controller is periodically read by a monitoring device.
The read data was displayed. FIG. 1 is a block diagram showing a configuration of an equipment monitoring system according to an embodiment of the present invention. The configuration of a conventional equipment monitoring system is the same as that of FIG. The equipment monitoring system will be described.

FIG. 4 shows a data access sequence of a conventional equipment monitoring system. First, the processing device 31 in the monitoring device 3 is a DDE (Dynamic Data Exchange) server 3.
0 is initialized (step 201), and DDE
The communication with the server 30 is started (step 202). D
In the DE server 30, a polling timer is started (Step 203), and a request message for requesting transmission of data to be monitored is generated based on the tag variable file sent from the processing device 31 (Step 20).
4). Then, the DDE server 30 transmits a request message to the controller 2 at regular intervals set by the timer (Step 205).

[0004] The controller 2 collects and accumulates data of the field devices 1 under management as needed. Then, when receiving the request message, the controller 2 generates a response message including the data requested by the request message (Step 206), and returns the generated response message to the DDE server 30 (Step 207). The DDE server 30 extracts data from the received response message (step 20).
8) The extracted data is transmitted to the processing device 31 (step 209). The processing device 31 stores the data received from the DDE server 30, and updates the currently displayed data to the received data when the data is being displayed (step 210).

[0005]

As described above, in the conventional equipment monitoring system, polling is executed at regular intervals and data is collected from each controller. Therefore, when the polling is executed, the controller 2 and the monitoring device 3 are used. There is a problem that the communication load of the network 4 and the monitoring device 3 between them increases. In particular, when the number of data to be monitored increases, there is a problem that a communication load further increases and a communication scan time required for data collection has to be lengthened. SUMMARY An advantage of some aspects of the invention is to provide a facility monitoring method and a facility monitoring system capable of reducing a communication load and shortening a communication scan time.

[0006]

According to the equipment monitoring method of the present invention, a request processing (a request processing for transmitting a valid request message for requesting data transmission only from a change of data to be monitored from the monitoring device (3) to the controller (2)). 103, 10
4) a transmission process (108, 109) for transmitting a data change message including the data from the controller to the monitoring device when a change occurs in the data specified by the valid request message; A receiving process (110-112, 114) for acquiring data from the received data change message is executed. In one example of the configuration of the equipment monitoring method of the present invention, after receiving the valid request message, an invalid request message requesting a stop of the data transmission is received from the monitoring device until the invalid request message is designated by the valid request message. The transmission process is executed each time data changes.

In the equipment monitoring system according to the present invention, the controller (2) includes an input / output processing means (201) for inputting / outputting a signal from / from the equipment (1) under management, and the controller (2) designates the signal by a valid request message. First message creating means (202) for creating a data change message including the data when the changed data occurs
And a first communication processing means (200) for transmitting the data change message to the monitoring device.
Means for generating the valid request message for requesting data transmission only when the data to be monitored changes, transmitting the valid request message to the controller, and receiving the data change message Second communication processing means (300)
And data acquisition means (302) for acquiring data from the received data change message. Further, in one configuration example of the equipment monitoring system of the present invention, the first message creating means of the controller includes:
After receiving the valid request message, create the data change message every time the data specified in the valid request message changes until receiving an invalid request message requesting stop of the data transmission from the monitoring device. Then, the data is transmitted to the monitoring device via the first communication processing means.

[0008]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a block diagram showing a configuration of a facility monitoring system according to an embodiment of the present invention. The equipment monitoring system according to the present embodiment is used for equipment monitoring of a facility such as a building or a plant, and for example, a field device 1 (1-1) such as an air conditioner or a lighting facility.
1-3), a controller 2 (2-1, 2-2) for controlling field devices and collecting data from the field devices, and monitoring for centrally monitoring and remotely controlling the distributed field devices and controllers. It comprises a device 3 and a network 4 connecting the controller 2 and the monitoring device 3.

The controller 2 creates a communication processing unit 200 for communicating with the monitoring device 3, an input / output processing unit 201 for inputting and outputting signals to and from the field device 1, and a message addressed to the monitoring device 3. A message creation unit 202, a message analysis unit 203 that analyzes a message transmitted from the monitoring device 3, and a storage unit 204 that stores the message transmitted from the monitoring device 3 and data collected from the field device 1.
And a control unit 205 for controlling the entire controller.

The monitoring device 3 includes a DDE (Dynamic Data Exchange) server 30 for communicating with the controller 2,
Processing device 3 for centralized monitoring of field devices and controllers
It consists of 1. The DDE server 30 includes a communication processing unit 300 for communicating with the controller 2, a message creating unit 301 for creating a message addressed to the controller 2, a message analyzing unit 302 for analyzing a message transmitted from the controller 2, and a controller 2. And a storage unit 303 for storing a tag variable file described later.

The processing unit 31 includes a display unit 310 for displaying data, a storage unit 311 for storing data and a tag variable file transmitted from the controller 2, and a control unit 312 for controlling the entire monitoring apparatus. Note that the controller 2 and the monitoring device 3 can be realized by a computer. This computer may have a known configuration including a central processing unit, a storage device, and an interface. The storage device stores a program for controlling these hardware resources.

Hereinafter, a data access sequence according to the present embodiment will be described with reference to FIG. First, the control unit 312 of the processing device 31 sends the command DDE_
By transmitting an INTIATE, the communication with the DDE server 30 is initialized (step 101). Subsequently, the control unit 312 sends a command DDE_ADV to the DDE server 30.
An ISE is transmitted to start COS (Change Of Status) communication for collecting data that has changed in monitoring target data (step 102). At this time, the processing device 3
The tag variable file stored in the storage unit 311 is DD
Sent to the E server 30 and stored in the storage unit 30 of the DDE server 30
3 is stored.

The data to be monitored includes a display unit 3
10 includes data being displayed or data registered in advance to be monitored. The tag variable defines the data to be monitored (monitoring point of the field device 1), the tag variable name assigned to this tag variable, and the item name specifying the field device 1 to be monitored and the data And the topic name which is the name or IP address of the controller 2 managing the data (field device 1) specified by the item name, and the name of the DDE server 30 connected to the controller 2 specified by the topic name And the application name. A collection of tag variables set for each data as described above is a tag variable file. If there are a plurality of DDE servers 30, the tag variable file stores the DDE specified by the application name.
It is sent to the DE server 30.

In response to the command DDE_ADVISE,
When the data specified by the item name of the tag variable file changes, the message creating unit 301 of the DDE server 30 creates an effective request message for requesting transmission of the data based on the tag variable file (step 103). Then, the communication processing unit 3 of the DDE server 30
00 transmits the valid request message created by the message creating unit 301 to the controller 2 specified by the topic name in the tag variable file (step 104).

The message analyzer 203 of the controller 2
Analyzes the valid request message received by the communication processing unit 200 and sends the analysis result to the control unit 205. The control unit 205 transmits the data specified by the valid request message when a change occurs in the data.
In order to make the S communication effective, the COS notification flag corresponding to the data is made effective (for example, 1) (step 10).
5).

Subsequently, the message creating section 202 of the controller 2 receives the valid request message and performs COS of the data specified by the valid request message.
A valid response message indicating that the communication has been validated is created (step 106). The communication processing unit 200
The valid response message created by the message creating unit 202 is returned to the DDE server 30 that has transmitted the valid request message (step 107).

Next, the control unit 205 of the controller 2
The data of the field devices 1 under management is collected as needed through the input / output processing unit 201, and the collected data is stored in the storage unit 204.
In a predetermined area. Then, the control unit 205
When a change occurs in the data for which the COS notification flag is valid, the data is transmitted to the monitoring device 3.
The message creation unit 202 creates a data change message.
To instruct. The message creator 202 retrieves the changed data from the storage 204 and creates a data change message including the retrieved data, and the item name and topic name corresponding to the data (step 108).

The communication processing unit 20 of the controller 2
0 transmits the data change message created by the message creating unit 202 to the DDE server 30 that has transmitted the valid request message (step 109). D
The communication processing unit 300 of the DE server 30
(Step 110). The message analysis unit 302 includes the communication processing unit 3
The data change message received at 00 is analyzed, and the topic name, item name and data are extracted from the data change message (step 111), and the extracted topic name, item name and data are transmitted to the processing device 31 (step 111). Step 112).

The message creation unit 30 of the DDE server 30
1 creates a response message indicating that the data change message has been received, and the communication processing unit 300 returns the response message created by the message creation unit 301 to the controller 2 that has transmitted the data change message (step 113). ).

The control unit 312 of the processing device 31 converts the data received from the DDE server 30 into a tag variable (DD of the transmission source).
Application name of E server 30, DDE server 30
(The topic name and the item name) received from the storage unit 311 and stored in the storage unit 311. If the data is being displayed, the data currently displayed on the display unit 310 is updated to the received data (step 114). ).

Next, the control unit 312 of the processing device 31 sends a command DDE_
By transmitting UNADVISE, a request is made to stop the COS communication (step 115). Command DDE_UNADV
After the transmission of the ISE, the tag variable file set in the storage unit 311 of the processing device 31 is deleted.

In response to the command DDE_UNADVISE, the message creation unit 301 of the DDE server 30
The communication processing unit 300 creates an invalidation request message requesting termination of the OS communication (step 116), and transmits the invalidation request message created by the message creating unit 301 to the controller 2 (step 11).
7).

The message analyzer 203 of the controller 2
Analyzes the invalidation request message received by the communication processing unit 200 and sends the analysis result to the control unit 205. The control unit 205 invalidates (eg, 0) the valid COS notification flag to invalidate the COS communication (step 118).

The message creation unit 202 of the controller 2 receives the invalidation request message and creates an invalidation response message indicating that the COS communication has been invalidated, and the communication processing unit 200 creates the invalidation response message by the message creation unit 202. DDE server 3 that is the source of invalid request message
0 (step 119).

Finally, the control unit 312 of the processing device 31
Command DDE_TERMINAT to the DDE server 30
E to end the DDE communication (step 12).
0). Steps 108 to 114 are executed each time the data whose COS notification flag is valid changes until the COS communication becomes invalid.

FIG. 3 is a diagram showing an example of the operation of the facility monitoring system according to the present embodiment. Control unit 31 of processing device 31
In step 2, a model of a screen to be displayed on the display unit 310 is created in advance. Here, it is assumed that the indoor temperature of the monitoring target facility is monitored. In correspondence with the data of the room temperature, the tag variable file of the storage unit 311 stores “temp”
A tag variable name of "1", a field name of "Al1" and an item name for designating data (room temperature) of "Value", a name of "IDC1" or an IP address of "192.13.114.1" A tag variable consisting of a topic name specifying the controller 2 and an application name specifying the DDE server 30 named “A” is set.

The DDE server 30 with the name “A” sends a validity request message to the controller 2 with the name “IDC1” to validate the COS communication of the data specified by the item name of the tag variable file. When a change occurs in the data of the item name “Al1.Value”, the controller 2 transmits a data change message including the data to the DDE server 30. The control unit 3 of the processing device 31 that has received the data via the DDE server 30
12 updates the displayed room temperature to the received data. For example, if Value = 25 (° C.), the room temperature of 25 ° C. is displayed on the screen of the display unit 310.

[0028]

According to the present invention, only when the data to be monitored changes, this data is transmitted from the controller to the monitoring device, so that all the data being monitored by the monitoring device is periodically updated. No need to send. As a result, the communication load of the network between the controller and the monitoring device and the monitoring device can be reduced. Also,
Even if the number of data to be monitored increases, the number of data transmitted from the controller can be suppressed, so that an increase in communication load can be suppressed and a communication scan time required for data collection can be reduced. .

Further, after receiving the valid request message, a transmission process is executed every time the data specified by the valid request message changes until an invalid request message requesting stop of data transmission is received from the monitoring device. With this configuration, it is possible for the monitoring device to update, in real time, data that has changed among the data to be monitored.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a facility monitoring system according to an embodiment of the present invention.

FIG. 2 is a sequence diagram illustrating a data access sequence according to the embodiment of the present invention.

FIG. 3 is a diagram showing an example of an operation of the facility monitoring system of FIG.

FIG. 4 is a sequence diagram for explaining a data access sequence in a conventional facility monitoring system.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... On-site equipment, 2 ... Controller, 3 ... Monitoring device, 4 ...
Network, 30: DDE server, 31: processing device,
200, 300: communication processing unit, 201: input / output processing unit,
202, 301 ... message creation unit, 203, 302 ...
Message analysis unit, 205, 312 ... control unit, 204,
303, 311: storage unit, 310: display unit.

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G08C 15/00 G08C 15/00 D (72) Inventor Yoshitaka Osawa 2-12-19 Shibuya 2-chome, Shibuya-ku, Tokyo 2F073 AA25 AB02 AB03 BB04 BC01 CC14 DD02 DE01 GG01 5H223 DD07 EE11 EE15 5K048 AA06 BA51 CA03 DA02 DC04 EA11 EB02 EB03 EB13 FB08 FC01 HA01 HA02 HA05 HA07 HA21 HA21 HA21

Claims (4)

[Claims] 1. A facility monitoring method for monitoring a facility by a monitoring apparatus through a controller that collects data from the facility to be monitored, wherein a valid request message requesting data transmission only when the data to be monitored changes is transmitted from the monitoring apparatus. A request process for transmitting to the controller; a transmission process for transmitting a data change message including the data from the controller to the monitoring device when a change occurs in the data specified by the valid request message; And a receiving process for acquiring data from the received data change message. 2. The facility monitoring method according to claim 1, wherein after receiving the validity request message, the facility requesting method is specified by the validity request message until receiving an invalidation request message requesting stop of the data transmission from the monitoring device. The equipment monitoring method, wherein the transmission processing is executed each time data changes. 3. A facility monitoring system for monitoring the facility with a monitoring device through a controller that collects data from the facility to be monitored, wherein the controller includes: an input / output processing unit configured to input / output a signal from a facility under management; A first message creating means for creating a data change message including the data when a change occurs in the data specified by the valid request message among the signals; and a first message sending means for sending the data change message to the monitoring device. A communication processing unit, wherein the monitoring device generates the valid request message requesting data transmission only when the data to be monitored changes, and transmits the valid request message to the controller. And a second communication processing means for receiving the data change message; Facility monitoring system; and a data acquisition means for acquiring data from a signal data change message. 4. The equipment monitoring system according to claim 3, wherein the first message creating means of the controller sends, after receiving the valid request message, an invalid request message requesting stop of the data transmission from the monitoring device. Until receiving, every time the data specified in the valid request message changes, the data change message is created and transmitted to the monitoring device via the first communication processing means. Monitoring system.