JP7442751B1 - Control program, supervisory control system, gateway device and control method - Google Patents

Abstract

The message acquisition unit (110) of the gateway device (100) in which the control program is installed acquires messages including signal data from the devices (211 to 214). The priority determination unit (130) selects signals included in messages acquired based on abnormality determination related data, which is data regarding the type of signal data used in abnormality determination of the equipment (201, 202) in the monitoring control server (300). Determine data priorities. The message transmitting unit (140) transmits the acquired message to the monitoring control server (300), and when the abnormality occurs in the network (400) and is resolved, the message transmitting unit (140) sends a message containing the signal data with the determined high priority. is sent to the supervisory control server (300) with priority over messages with lower priority.

Description

The present disclosure relates to a control program, a supervisory control system, a gateway device, and a control method.

Conventionally, a gateway device placed at a production site such as a factory transmits data collected from equipment placed in the equipment to be monitored to a monitoring control server via a public communication network, and the data collected by the monitoring control server is transmitted. 2. Description of the Related Art There are known monitoring and control systems that centrally manage equipment to perform monitoring such as abnormality determination and control of the equipment. In such a monitoring system, there is a need for a technique that allows the monitoring control server to reliably determine an abnormality in equipment while reducing delays in abnormality determination.

Patent Document 1 discloses a time-series data collection system that transmits data collected by a gateway device placed in each facility to a monitoring and control device via a communication network. In Patent Document 1, the gateway device stores the collected data in a data storage area and transmits it to the monitoring and control device, and when receiving a data re-collection request from the monitoring and control device, the gateway device stores the data accumulated in the data storage area. is being resent. In other words, the system described in Patent Document 1 prevents data loss and improves communication by storing and retransmitting data that has failed to be sent to a supervisory control device in a gateway device when the quality of the communication network deteriorates. This is a data buffering system that can simplify data management in the event of an abnormality.

Patent Document 2 describes a monitoring device that includes a gateway device that receives messages including signal data of each device from a plurality of devices monitored and controlled by a monitoring and control device, and transmits the received message to the monitoring and control device via a network. A control system is disclosed. In Patent Document 2, a gateway device determines the priority of a message based on a state indicated by relationship data of each signal data obtained by analyzing drawing information of a plant in which equipment including a plurality of devices is installed, A message with a determined high priority is given priority and sent to the supervisory control device.

Japanese Patent Application Publication No. 2004-246438 JP 2020-162063 Publication

In the collection system disclosed in Patent Document 1, the monitoring and control device is able to determine abnormalities in each facility after sequentially receiving retransmitted data in response to data recollection requests received by the gateway device. . As a result, the collection system disclosed in Patent Document 1 has a problem in that when an abnormality in a communication network is resolved, determination of the abnormality is delayed.

On the other hand, in the supervisory control system disclosed in Patent Document 2, the gateway device analyzes the configuration of the plant from drawing information of the plant and gives priority to messages containing signal data of devices with high importance to the supervisory control device. Sending. However, in the supervisory control system disclosed in Patent Document 2, the gateway device automatically determines the priority based on plant drawing information, and the supervisory control device determines whether the message is actually used for abnormality determination. It does not take into account. Therefore, for example, a message determined by the gateway device to have a high priority may not be used for abnormality determination, and a message determined by the gateway device to have low priority may be used for abnormality determination. In this case, similarly to the collection system disclosed in Patent Document 1, the monitoring control system disclosed in Patent Document 2 has a problem in that abnormality determination is delayed when a network abnormality is resolved.

The present disclosure has been made in view of the above circumstances, and aims to reduce the delay in determining equipment abnormality when a network abnormality is resolved.

In order to achieve the above object, a control program according to the present disclosure transmits signal data acquired from equipment placed in equipment to be monitored in a supervisory control system to a supervisory control server that monitors the equipment via a network. A message acquisition unit acquires a message including signal data from equipment, and a message acquisition unit acquires a message including signal data from equipment based on abnormality determination related data, which is data related to the type of signal data used in equipment abnormality determination in the monitoring control server. A priority determination unit that determines the priority of signal data included in an acquired message, and a message transmission unit that transmits the message acquired by the message acquisition unit to the monitoring control server. If the problem is resolved, the system functions as a message transmitting unit that sends messages containing high priority signal data determined by the priority determining unit to the supervisory control server with priority over messages containing low priority signal data, and detects the abnormality. The determination-related data is data that indicates the number of times each type of signal data is used in the abnormality determination conditions used in the abnormality determination of equipment in the monitoring control server, and the priority determining unit determines the number of times each type of signal data is used in the abnormality determination conditions indicated by the abnormality determination-related data for the signal data. The priority to be determined increases as the number of times of use increases .

According to the present disclosure, when a network abnormality is resolved, the priority of signal data included in a new message sent from the gateway device to the supervisory control server is determined by the signal data used in the supervisory control server to determine an equipment abnormality. It is determined based on abnormality determination related data, which is data related to the type of. As a result, the control program according to the present disclosure can reduce the delay in equipment abnormality determination when a network abnormality is resolved, compared to a control program in which the priority of signal data is not determined based on the abnormality determination related data described above.

Overall explanatory diagram of a supervisory control system according to an embodiment Block diagram showing the hardware configuration of each device according to the embodiment A diagram showing an example of displaying signal data according to an embodiment. A diagram showing a display example of abnormality determination condition data according to an embodiment A diagram illustrating a display example of abnormality determination related data according to an embodiment Flowchart of message sending process according to embodiment Timing chart showing values of signal data of each device received by the supervisory control server of the supervisory control system according to the embodiment when no network failure occurs Timing chart showing the values of signal data from each device received by the monitoring control server of a conventional monitoring system when a network failure occurs Timing chart showing values of signal data of each device received by the supervisory control server of the supervisory control system according to the embodiment when a network failure occurs Overall explanatory diagram of a supervisory control system according to a modified example of the embodiment

Hereinafter, a control program, a supervisory control system, a gateway device, and a control method according to embodiments of the present disclosure will be described in detail with reference to the drawings. In addition, the same reference numerals are given to the same or corresponding parts in the figures.

(About the supervisory control system 1 according to the embodiment)
The monitoring and control system 1 according to the embodiment of the present disclosure is a remote monitoring and control system that monitors and controls equipment 200 at a production site such as a factory or a plant from a remote location based on data collected from the equipment 200, for example. As shown in FIG. 1, the supervisory control system 1 includes a gateway device 100 and equipment 200 that are provided at a production site, and a supervisory control server 300 that is located at a remote location and monitors and controls the equipment 200. The gateway device 100 and the monitoring control server 300 are capable of transmitting and receiving data through a network 400 configured by a WAN (Wide Area Network) such as the Internet or a wide area line, for example. Therefore, in the supervisory control system 1, the supervisory control server 300 can monitor and control the equipment 200 from a remote location by transmitting and receiving data regarding the equipment 200 via the gateway device 100 and the network 400. There is.

(About the equipment 200 according to the embodiment)
The equipment 200 is, for example, one or more equipment such as a processing machine included in a production line that is monitored and controlled by the supervisory control server 300. For example, the equipment 200 includes a first equipment 201 and a second equipment 202. A plurality of devices are arranged in each of the facilities 201 and 202. For example, the first equipment 201 includes a first equipment 211 and a second equipment 212, and the second equipment 202 includes a third equipment 213 and a fourth equipment 214.

Each of the devices 211 to 214 is, for example, a so-called FA (Factory Automation) device such as a programmable logic controller (PLC), and has a configuration as a computer device such as a controller and a memory. Furthermore, each of the devices 211 to 214 is capable of transmitting and receiving data to and from the gateway device 100 via a wireless or wired LAN (Local Area Network) 500. Each of the devices 211 to 214 includes a signal data generation section 221 that generates signal data to be described later, a date and time data addition section 222 that adds date and time data indicating the date and time when signal data was generated, a signal data storage section 223 that stores signal data, It includes a message output unit 224 that outputs messages.

(About gateway device 100 according to embodiment)
The gateway device 100 is a computer device that acquires and stores data from each device 211 to 214 of the facility 200, and transmits the acquired data to the monitoring control server 300. The gateway device 100 includes a message acquisition unit 110 that acquires messages, an abnormality determination related data storage unit 120 that stores abnormality determination related data (described later), and a priority determination unit 130 that determines the priority of signal data (described later). Further, the gateway device 100 includes a message transmitting section 140 that transmits a message, and a retransmission message storage section 150 that stores a message to be retransmitted.

(About the monitoring control server 300 according to the embodiment)
The monitoring control server 300 is, for example, a server computer that functions as a so-called cloud server. The monitoring control server 300 centrally manages data collected from each device 211 to 214 of the equipment 200, and monitors and controls each equipment 201 and 202. The monitoring control server 300 includes a message receiving section 310 that receives messages, an abnormality determination condition data storage section 320 that stores abnormality determination condition data to be described later, and an abnormality determination section 330 that determines an abnormality of each of the equipment 201 and 202.

(About the hardware configuration of gateway device 100 according to the embodiment)
As shown in FIG. 2, the gateway device 100 includes a control unit 51 that executes processing according to a control program 59, for example. The control unit 51 includes a CPU (Central Processing Unit). The control unit 51 functions as the priority determination unit 130 shown in FIG. 1 according to the control program 59.

Returning to FIG. 2, the gateway device 100 includes a main storage section 52 that loads a control program 59 and is used as a work area for the control section 51. The main storage unit 52 includes a RAM (Random Access Memory).

The gateway device 100 also includes an external storage unit 53 that stores a control program 59 in advance. The external storage section 53 supplies the data stored by this program to the control section 51 according to instructions from the control section 51, and stores the data supplied from the control section 51. The external storage unit 53 includes a recording medium such as a flash memory, an HDD (Hard Disk Drive), and an SSD (Solid State Drive). The external storage section 53 functions as the abnormality determination related data storage section 120 and the retransmission message storage section 150 shown in FIG.

The gateway device 100 also includes a transmitting/receiving section 56 that transmits and receives information. The transmitting/receiving unit 56 includes information communication components such as a communication network termination device and a wireless communication device connected to the network 400 or the LAN 500. The transmitting/receiving section 56 functions as the message acquiring section 110 and the message transmitting section 140 shown in FIG.

Returning to FIG. 2, in the gateway device 100, the main storage section 52, the external storage section 53, and the transmitting/receiving section 56 are all connected to the control section 51 via the internal bus 50.

In the gateway device 100, the control section 51 uses the main storage section 52, the external storage section 53, and the transmitting/receiving section 56 as resources, thereby realizing the functions of the above-mentioned sections 110 to 150 shown in FIG. For example, the gateway device 100 executes a message acquisition step performed by the message acquisition unit 110, an abnormality determination related data storage step performed by the abnormality determination related data storage unit 120, and a priority determination step performed by the priority determination unit 130. Further, the gateway device 100 executes a message sending step performed by the message sending section 140 and a retransmission message storage step performed by the retransmission message storage section 150.

(About the hardware configuration of each device 211 to 214 according to the embodiment)
Further, like the gateway device 100, each of the devices 211 to 214 includes a control section 51, a main storage section 52 connected to the control section 51 via an internal bus 50, an external storage section 53, and a transmitting/receiving section 56. The control unit 51 functions as the signal data generation unit 221 and the date and time data provision unit 222 shown in FIG. 1, the external storage unit 53 functions as the abnormality determination condition data storage unit 320 shown in FIG. It functions as the message output unit 224 shown in FIG. Furthermore, in the same way as the gateway device 100, the control section 51 uses the main storage section 52, the external storage section 53, and the transmitting/receiving section 56 as resources, so that each of the devices 211 to 214 can control the functions of the above-mentioned sections 221 to 224 shown in FIG. Achieve functionality. For example, each of the devices 211 to 214 performs a signal data generation step performed by the signal data generation section 221, a date and time data provision step performed by the date and time data provision section 222, a signal data storage step performed by the signal data storage section 223, and a message output section 224. Execute the message output step to be performed.

(About the hardware configuration of the monitoring control server 300 according to the embodiment)
Also, like the gateway device 100 and each device 211 to 214, the supervisory control server 300 also includes a control section 51, a main storage section 52 connected to the control section 51 via an internal bus 50, an external storage section 53, and a transmitting/receiving section. A section 56 is provided. The control unit 51 functions as the abnormality determination unit 330 shown in FIG. 1, the external storage unit 53 functions as the abnormality determination condition data storage unit 320 shown in FIG. 1, and the transmission/reception unit 56 functions as the message reception unit shown in FIG. 310. Also, in the supervisory control server 300, the control section 51 uses the main storage section 52, the external storage section 53, and the transmitting/receiving section 56 as resources, in the same way as the gateway device 100 and each device 211 to 214. The functions of each part 210 to 230 are realized. For example, the monitoring control server 300 executes a message receiving step performed by the message receiving unit 310, an abnormality determination condition data storage step performed by the abnormality determination condition data storage unit 320, and an abnormality determination step performed by the abnormality determination unit 330.

(Details of the functional configuration of each device 211 to 214 according to the embodiment)
The signal data generation unit 221 generates signal data for each device 211-214. Here, the signal data is, for example, if each device 211 to 214 is a PLC, signal data that is internal signal data of each device 211 to 214, or input from a sensor (not shown) connected to each device 211 to 214. It includes various types of signal data such as input signal data, which is signal data that has been input. Note that the internal signal data is, for example, data that includes a value indicating whether the state of each device 211 to 214 is "normally operating,""abnormallyoperating," or "stopped." In addition, the input signal data is, for example, data indicating whether the state of the machine to be measured by the sensor is "normally operating,""abnormallyoperating," or "stopped."

The date and time data adding unit 222 adds a timestamp, which is an example of date and time data indicating the date and time when the signal data was generated, to the signal data, and the signal data storage unit 223 stores the signal data to which the timestamp has been added. Therefore, the signal data stored in the signal data storage unit 223 is, for example, data indicating the status of each device 211 to 214 at each time, and can be displayed as a list in a table format as shown in FIG. .

As shown in FIG. 3, the signal data includes data corresponding to the items "time" indicating the time when the signal data was generated and "value" indicating the value of the signal data. For example, the signal data stored in the signal data storage unit 223 of the first device 211 can specify that the "value" is "0" when the "time" is "10:10:20.12". This is data.

The message output unit 224 outputs a message including the signal data stored in the signal data storage unit 223 to the gateway device 100 based on an acquisition request from the gateway device 100. When there is an acquisition request from the gateway device 100 for specific signal data that is signal data to which a timestamp indicating a specific time has been added, the message output unit 224 outputs a message from among the signal data stored in the signal data storage unit 223. outputs a message containing signal data with a timestamp closest to the specified time. For example, when there is a request from the gateway device 100 to acquire specific signal data whose "time" is "10:10:20.12", the message output unit 224 of the first device 211 outputs a signal from the first device 211. A message containing specific signal data stored in the data storage unit 223 whose “time” is “10:10:20.12” and whose “value” is “0” is output to the gateway device 100.

(Details of the functional configuration of the monitoring control server 300 according to the embodiment)
The message receiving unit 310 receives the message sent by the gateway device 100. Furthermore, if an abnormality such as a failure occurs in the network 400 and the gateway device 100 fails to send a message, and then the abnormality is resolved, the message receiving unit 310 receives the message retransmitted by the gateway device 100.

The abnormality determination condition data storage unit 320 stores a plurality of types of abnormality determination condition data. Here, the abnormality determination condition data is data indicating conditions for determining whether each of the equipment 201, 202 is abnormal. In this embodiment, the abnormality determination condition data is data indicating a conditional expression for determining whether or not each of the equipment 201 and 202 is abnormal, and can be displayed as a list in a table format as shown in FIG. be.

As shown in FIG. 4, the abnormality determination condition data includes items such as "facility name" indicating the name of the production site, "gateway" indicating the name of the gateway device 100, and "equipment name" indicating the name of each facility 201, 202. Contains data corresponding to. For example, the abnormality determination condition data includes an "error ID" indicating the identification number of the abnormality, a "device name" indicating the name of each device 211 to 214 that causes the abnormality, and a "signal ID" indicating the identification number of the signal data. ” Contains data corresponding to the items. For example, the abnormality judgment condition data includes, for the abnormality judgment condition expression, a "sign" indicating the sign of the operator, a "judgment destination" indicating whether the judgment destination is a fixed value or a value of other signal data, It includes data corresponding to the items "equipment name" indicating the names of the devices 211 to 214 that generated other signal data, and "fixed value/signal ID" indicating the fixed value or identification number of other signal data.

For example, in the abnormality judgment condition data, "facility name" is "factory X line Y", "gateway" is "gateway 1", "equipment name" is "processing machine A", "error ID" is "E001", " "Device name" is "PLC1", "Signal ID" is "0001", "sign" is "<" for the abnormality judgment condition expression, "judgment destination" is "fixed value", "device name" is "-", i.e. This is data that can specify that "absence" and "fixed value/signal ID" are "10".

The abnormality determination unit 330 determines whether each equipment 201 , 202 is performed. For example, when the abnormality determination unit 330 receives a message including signal data in which the identification number of the device 211 in “PLC1” is “0001” from the gateway device 100 in “Gateway 1”, the abnormality determination unit 330 determines that the value of the signal data is “10”. If it is smaller than , it is determined that an abnormality with identification number "E001" has occurred.

(Details of functional configuration of gateway device 100 according to embodiment)
The message acquisition unit 110 acquires messages including signal data output from each device 211-214. The message acquisition unit 110 can acquire messages including specific signal data from each of the devices 211 to 214. For example, when the message acquisition unit 110 requests the first device 211 to acquire specific signal data whose “time” is “10:10:20.12,” the message acquisition unit 110 requests the first device 211 to acquire specific signal data whose “time” is “10:10:20.12.” 10:20.12'' can be obtained.

The abnormality determination related data storage unit 120 stores abnormality determination related data, which is data regarding the type of signal data used for abnormality determination of each of the equipment 201 and 202 in the monitoring control server 300. Here, the abnormality determination related data is data indicating the number of times each type of signal data is used in the abnormality determination conditional expression used in the abnormality determination of each of the facilities 201 and 202 in the monitoring control server 300. Specifically, the abnormality determination related data is obtained by analyzing all the abnormality determination condition data stored in the abnormality determination condition data storage unit 320 of the supervisory control server 300, and by analyzing the signal data used in each abnormality determination condition expression. This data indicates the number of times each identification number has been used, and can be displayed as a list in a table format as shown in FIG.

As shown in FIG. 5, the abnormality determination related data includes "equipment name" indicating the name of each device 211 to 214, "signal ID" indicating the identification number of the signal data, and "use Contains data corresponding to the item "Number of times". For example, the abnormality determination related data is data that can specify that the "equipment name" is "PLC1", the "signal ID" is "0002", and the "number of times of use" is "3". Note that in order to control in this way, the gateway device 100 acquires and analyzes all the abnormality determination condition data stored in advance in the abnormality determination condition data storage unit 320 from the monitoring control server 300, and analyzes the abnormality determination related data. It needs to be generated and memorized.

The priority determination unit 130 determines the priority of the signal data included in the message acquired by the message acquisition unit 110 based on the abnormality determination related data stored in the abnormality determination related data storage unit 120. The priority determination unit 130 increases the priority determined for the signal data included in the message acquired by the message acquisition unit 110 as the “number of uses” indicated by the abnormality determination related data increases. For example, in the example shown in FIG. 5, the priority determining unit 130 determines the priority of signal data in which the "device name" is "PLC1", the "signal ID" is "0002", and the "number of times of use" is "3". is set higher than the priority of the signal data whose "device name" is "PLC1", "signal ID" is "0001", and "number of times of use" is "2".

The message transmitting unit 140 transmits the message acquired by the message acquiring unit 110 to the monitoring control server 300.

When an abnormality occurs in the network 400 and transmission of a message to the monitoring control server 300 fails, the retransmission message storage unit 150 stores, as messages to be retransmitted, the message that failed to be transmitted and the message obtained after the abnormality occurs in the network 400. The unsent messages acquired by the unit 110 are stored. Note that when an abnormality occurs in the network 400 and message transmission fails, the gateway device 100 stores the message to be retransmitted in the retransmitted message storage unit 150, and when the abnormality is resolved thereafter, the retransmitted message storage unit 150 stores the message to be retransmitted. Send a remembered message.

At this time, the message transmitting section 140 transmits a message including signal data having a high priority determined by the priority determining section 130 to the supervisory control server 300, giving priority to a message having a low priority. Specifically, the message transmitting unit 140 transmits messages in order of priority, that is, messages including signal data with the highest "number of uses" indicated by the abnormality determination related data. For example, in the example shown in FIG. 5, the message transmitting unit 140 transmits a message containing signal data having a "number of uses" of "3" and a "signal ID" of "0002" with the highest priority. Furthermore, the message transmitting unit 140 transmits a message containing signal data having a "number of uses" of "2" and a "signal ID" of "0001" with second priority. Furthermore, the message transmitting unit 140 transmits signal data having a "number of uses" of "1" and a "signal ID" of "0011" or "0012" with third priority.

(About message sending process according to embodiment)
Next, an operation in which the gateway device 100 transmits messages acquired from each of the devices 211 to 214 to the monitoring control server 300 will be described using a flowchart. When the gateway device 100 starts the control program 59, it starts executing the message sending process shown in FIG. First, the gateway device 100 causes the message acquisition unit 110 to acquire a message including signal data output from each device 211 to 214 (step S101), and causes the message transmission unit 140 to transmit the acquired message to the monitoring control server 300. (Step S102). After transmitting the message, the gateway device 100 determines whether an abnormality has occurred in the network and the message transmission has failed (step S103).

If the gateway device 100 succeeds in sending the message without any abnormality occurring in the network (step S103; N), the gateway device 100 returns to step S101, and continues from step S101 until an abnormality occurs in the network and sending the message fails. The process of S103 is repeated. On the other hand, if the gateway device 100 fails to send the message due to an abnormality in the network (step S103; Y), the gateway device 100 stores the message that failed to be sent in the retransmission message storage unit 150 (step S104), and It is determined whether or not the problem has been resolved (step S105). If the network abnormality has not been resolved (step S105; N), the gateway device 100 causes the message acquisition unit 110 to acquire the message (step S106), and stores the acquired message in the retransmission message storage unit 150 (step S107). ).

After storing the message, the gateway device 100 returns to step S105 and repeats the processing of steps S105 to S107 until the network abnormality is resolved. On the other hand, if the network abnormality is resolved (step S105; Y), the gateway device 100
Messages containing signal data with a high priority determined by the priority determination unit 130, that is, signal data with a high number of uses indicated by the abnormality determination related data stored in the abnormality determination related data storage unit 120, are sent to the message acquisition unit 110 The messages are transmitted in order from the beginning (step S108), and the process returns to step S101.

As explained above, according to the supervisory control system 1 according to the present embodiment, the gateway device 100 includes signal data acquired from each device 211 to 214 arranged in each facility 201 and 202 to be monitored. The message is sent via the network 400 to the monitoring and control server 300 that monitors and controls each of the facilities 201 and 202.

Therefore, the supervisory control server 300 controls each equipment based on the signal data of each of the devices 211 to 214 included in the message received from the gateway device 100 and the abnormality determination condition data stored in the abnormality determination condition data storage section 320. Abnormality determinations 201 and 202 can be performed.

Here, for example, the supervisory control server 300 uses first signal data and second signal data, which are two types of signal data of the first device 211, and one type of signal data of the second device 212, as examples of signal data. Consider a case where the first equipment 201 is monitored using the third signal data. In addition, in this case, the condition for abnormality determination based on the abnormality determination condition expression indicated by the abnormality determination condition data is "the value of the first signal data is 10 or more and the value of the third data is 5 or less", as shown in FIG. Assume that the supervisory control server 300 receives a message including each signal data every second from "9:00" to "9:18".

For example, as shown in FIG. 7, the values of the first signal data and the third signal data used by the supervisory control server 300 to determine the abnormality of the first equipment 201 are "9" and "14" at "9:08". At "9:09", they are "10" and "5". Therefore, the supervisory control server 300 determines that the condition that "the value of the first signal data is 10 or more and the value of the third data is 5 or less" is satisfied at "9:09", and the It can be determined that an abnormality has occurred.

Further, according to the supervisory control system 1 according to the present embodiment, in the gateway device 100, the message acquisition unit 110 acquires messages including signal data from each of the devices 211 to 214. The priority determination unit 130 also stores abnormality determination-related data stored in the abnormality determination-related data storage unit 120, that is, data regarding the type of signal data used in the abnormality determination of each equipment 201, 202 in the monitoring control server 300. Based on this, the priority of the signal data included in the message acquired by the message acquisition unit 110 is determined. Additionally, the message transmitting unit 140 transmits the message acquired by the message acquiring unit 110 to the monitoring control server 300. If the abnormality is resolved after an abnormality occurs in the network 400, the message transmitting unit gives priority to a message containing signal data with a high priority determined by the priority determination unit 130 over a message with a low priority. The information is sent to the monitoring control server 300.

By doing so, the supervisory control system 1 according to the present embodiment sets the priority of signal data based on the data regarding the type of signal data used for abnormality determination of each equipment 201 and 202 in the supervisory control server 300. It is possible to reduce the delay in abnormality determination for each of the facilities 201 and 202 when a network abnormality is resolved, compared to conventional monitoring and control systems such as Patent Documents 1 and 2 in which the determination is not made.

Here, for example, in a conventional supervisory control system, the supervisory control server monitors the first equipment using the above-mentioned first signal data, second signal data, and third signal data, and the conditions for abnormality determination are Consider a case where "the value of the first signal data is 10 or more and the value of the third data is 5 or less". In this case, as shown in FIG. 8, after the supervisory control server receives the message every second from "9:00" to "9:05", it receives the message "9:11" from before "9:06". After being unable to receive messages due to a network failure for more than 5 seconds before ``9:11'' to ``9:18'' after recovering from the failure, messages were received every second from 9:11 to 9:18. shall be. Furthermore, in this case, after the gateway device recovers from the network failure, it is assumed that message transmission is resumed in the order in which transmission failed.

In this case, the message received by the supervisory control server from "9:11" includes signal data that is delayed by 5 seconds compared to the case where the network failure shown in FIG. 7 did not occur. For example, as shown in FIG. 8, the values of the first signal data and the third signal data used by the supervisory control server to determine the abnormality of the first equipment are "9" and "14" at "9:13". , "10" and "5" at "9:14". For this reason, if the period during which a message could not be received due to a network failure is 5 seconds, the supervisory control server will issue a message at 9:14, 5 seconds later, with the message ``The first signal data value is 10 or more and the third signal data value is 10 or more, It is determined that the condition "data value is 5 or less" is satisfied, and it is determined that an abnormality has occurred in the first equipment. As a result, in the conventional supervisory control system, the period during which messages could not be received due to a network failure becomes the period during which abnormality determination of the first equipment is delayed.

On the other hand, in the supervisory control system 1 according to the present embodiment, after the gateway device 100 recovers from the failure in the network 400, among the signal data that failed to be transmitted, the data is used to determine the abnormality of the first equipment 201. Transmission is restarted with priority given to the message containing the first signal data and the message containing the third signal data. Therefore, the supervisory control server 300 receives the first signal data that could not be received due to the failure by not receiving the message including the second signal data from "9:11" to "9:18" when the network was recovered from the failure. and the message including the third signal data can be promptly received.

For example, as shown in FIG. 9, the values of the first signal data and the third signal data used by the supervisory control server 300 to determine abnormality of the equipment are "10" and "5" at "9:12". Therefore, if the network failure lasts for 5 seconds, the supervisory control server 300 detects that "the value of the first signal data is 10 or more and the value of the third data is 5 or less" at 9:12, 3 seconds later. It is determined that the following conditions are satisfied, and it is determined that an abnormality has occurred in the first equipment 201. Therefore, in the supervisory control system 1 according to the present embodiment, the period until abnormality determination of the first equipment 201 is determined is shorter by 2 seconds than in the conventional supervisory control system. As a result, the supervisory control system 1 according to the present embodiment can reduce the delay in abnormality determination of each of the facilities 201 and 202 more than the conventional supervisory control system.

Further, according to the supervisory control system 1 according to the present embodiment, the abnormality determination related data is used for each type of signal data in the abnormality determination conditional expression used in the abnormality determination of each equipment 201 and 202 in the supervisory control server 300. This is data indicating the number of times. Then, the priority determination unit 130 increases the determined priority of the signal data included in the message acquired by the message acquisition unit 110 as the number of uses indicated by the abnormality determination related data increases.

By doing so, the supervisory control system 1 according to the present embodiment is able to improve the priority of the signal data at the time of resolving a network abnormality, compared to the supervisory control system in which the priority of signal data does not increase as the number of times of use increases. Delays in abnormality determination can be reduced.

Here, in the collection system disclosed in Patent Document 1, the gateway device attaches a time stamp to the data it has collected at the timing when the data is acquired. Therefore, in the collection system disclosed in Patent Document 1, for example, when there are multiple devices that collect data as in this embodiment, a time stamp is added to the data each time data is collected from each device. Then, there is a problem that different timestamps are given to data generated by each device at the same timing. As a result, in the system disclosed in Patent Document 1, when there are multiple devices collecting data, the accuracy of time synchronization of the data collected from each device becomes low, and the monitoring and control device detects abnormalities in each device. There is a problem that there may be errors or errors may be detected incorrectly.

In particular, in the collection system disclosed in Patent Document 1, when the gateway device acquires data from each device via a network such as a LAN as in this embodiment, each device receives data at the same timing due to the time lag of the network. There is a problem in that the time error in the time stamp added to the generated data becomes large. As a result, in the system disclosed in Patent Document 1, when the gateway device acquires data from each device via the network, the accuracy of time synchronization of the data collected from each device becomes even lower, and the monitoring and control device There is a problem that the number of undetected and false detections of device abnormalities increases.

In contrast, according to the supervisory control system according to the present embodiment, each of the devices 211 to 214 adds a time stamp as date and time data to the generated signal data. In the gateway device 100, the message acquisition unit 110 acquires a message including specific signal data to which a timestamp indicating a specific time is added from each device 211 to 214 via the LAN 500, and the message transmission unit 140 A message including specific signal data is sent to the supervisory control server 300.

By doing so, the supervisory control system 1 according to the present embodiment is a supervisory control system that does not add date and time data to the signal data generated by each device when there are multiple devices 211 to 214 that collect signal data. The precision of time synchronization of the signal data collected from each device 211 to 214 is higher than that, and the monitoring control server can reduce undetected or false detection of abnormalities in each device 211 to 214.

(Example of change)
In the above embodiment, the supervisory control system 1 is a remote supervisory control system in which the supervisory control server 300 is provided at a remote location of the production base, but it is possible that the supervisory control server 300 is not located at a remote location. For example, it may be installed at a production site. In this case, for example, a management device, which is a computer device of a manager installed at a remote location of the production site, receives data indicating the monitoring results of each equipment 201 and 202 from the monitoring control server 300 via the network 400, Data indicating a command to control each of the facilities 201 and 202 may be transmitted to the monitoring control server.

In the above embodiment, the monitoring control server 300 monitors and controls each of the equipment 201 and 202, but is not limited to this as long as it determines the abnormality of each equipment 201 and 202. For example, Only the respective facilities 201 and 202 may be monitored.

Note that in the above embodiment, the gateway device 100 is separate from each of the devices 211 to 214, but the gateway device 100 is not limited to this as long as it can acquire messages including signal data from each of the devices 211 to 214. For example, the gateway device 100 may be integrated with the first device 211. Specifically, as shown in FIG. 10, the first device 211 includes each section 110 to 150 of the gateway device 100, and receives messages including signal data from the second device 212, third device 213, and fourth device 214. It may be possible to obtain it.

In the above embodiment, the abnormality determination condition data is data indicating a conditional expression for determining whether or not each of the equipment 201 and 202 is abnormal; The data does not have to be a conditional expression, as long as it is data that indicates a condition that allows determination of whether or not the condition is true. For example, the abnormality determination condition data may be data indicating a condition sentence that is a condition sentence that can determine whether or not each of the equipment 201 and 202 is abnormal.

Note that in the above embodiment, when an abnormality occurs in the network 400, the gateway device 100 stores the message whose transmission failed and the unsent message acquired after the abnormality occurred in the retransmission message storage unit 150. However, it is not limited to this. For example, the gateway device 100 may store all messages obtained from each of the devices 211 to 214, regardless of whether an abnormality has occurred in the network 400. In this case, when an abnormality occurs in the network 400, the gateway device 100 identifies all messages acquired for the purpose of sending after the abnormality occurs in the network 400, and after the abnormality is resolved, all the identified messages needs to be sent to the monitoring control server 300.

Note that the main part that the gateway device 100, which includes the control section 51, the main storage section 52, the external storage section 53, the transmitting/receiving section 56, and the internal bus 50 performs processing, is, for example, a control program for executing the above operations. 59 may be stored and distributed in a recording medium readable by the gateway device 100, for example, a flash memory, and the gateway device 100 that executes the above processing may be configured by installing the control program 59. Alternatively, the control program 59 may be stored in a storage device of a server device on a communication network such as the LAN 500 or the Internet, and the gateway device 100 may configure the gateway device 100 by downloading the control program 59.

In addition, when the functions of the gateway device 100 are realized by sharing the OS (Operating System) and application programs, or by cooperating with the OS and application programs, only the application program portion is stored in a recording medium or storage device. Good too.

It is also possible to superimpose the control program 59 on a carrier wave and provide it via a communication network. For example, the control program 59 may be posted on a bulletin board system (BBS) on a communication network, and the control program 59 may be provided via the communication network. Then, the above processing may be executed by starting the control program 59 and executing it under the control of the OS in the same manner as other application programs.

The present disclosure is capable of various embodiments and modifications without departing from the broad spirit and scope of the present disclosure. Further, the embodiments described above are for explaining the present disclosure, and do not limit the scope of the present disclosure. In other words, the scope of the present disclosure is indicated by the claims rather than the embodiments. Various modifications made within the scope of the claims and the meaning of the disclosure equivalent thereto are considered to be within the scope of the present disclosure.

DESCRIPTION OF SYMBOLS 1... Supervisory control system, 50... Internal bus, 51... Control section, 52... Main storage section, 53... External storage section, 56... Transmission/reception section, 59... Control program, 100... Gateway device, 110... Message acquisition section, 120 ...Abnormality determination related data storage unit, 130...Priority determination unit, 140...Message transmission unit, 150...Retransmission message storage unit, 200...Equipment, 201...First equipment, 202...Second equipment, 211...First equipment, 212...Second device, 213...Third device, 214...Fourth device, 221...Signal data generation section, 222...Date and time data adding section, 223...Signal data storage section, 224...Message output section, 300...Monitoring control server , 310...Message receiving unit, 320...Abnormality determination condition data storage unit, 330...Abnormality determination unit, 400...Network, 500...LAN.

Claims (7)

A gateway device that transmits signal data acquired from equipment placed in equipment to be monitored in a supervisory control system to a supervisory control server that monitors the equipment via a network.
a message acquisition unit that acquires a message including the signal data from the device;
Determining the priority of the signal data included in the message acquired by the message acquisition unit based on abnormality determination related data that is data related to the type of signal data used for abnormality determination of the equipment in the monitoring control server. a priority determining unit to
a message transmitting unit that transmits the message acquired by the message acquiring unit to the monitoring control server, and when the abnormality is resolved after an abnormality occurs in the network, the priority determined by the priority determining unit; the message transmitting unit that transmits the message containing the signal data with a high priority to the supervisory control server with priority over the message containing the signal data with a low priority;
function as
The abnormality determination related data is data indicating the number of times each type of signal data is used under abnormality determination conditions used for abnormality determination of the equipment in the monitoring and control server,
The priority determining unit increases the determined priority of the signal data as the number of uses indicated by the abnormality determination related data increases.
control program. The number of times of use is the number of types of the abnormality determination condition that are used when multiple types of the abnormality determination condition are set.
The control program according to claim 1. The device adds date and time data to the signal data, which is data indicating the date and time when the signal data was generated;
The message acquisition unit is capable of acquiring the message including specific signal data, which is the signal data to which date and time data indicating a specific date and time is attached, from the device;
The message transmitter is capable of transmitting the message including the specific signal data,
The control program according to claim 1 or 2. The gateway device and the device are integrated.
The control program according to claim 1 . Monitoring comprising a supervisory control server that monitors and controls equipment to be monitored via a network, equipment placed in the equipment, and a gateway device that acquires signal data from the equipment and sends it to the supervisory control server. A control system,
The gateway device includes:
a message acquisition unit that acquires a message including the signal data from the device;
an abnormality determination related data storage unit that stores abnormality determination related data that is data regarding the type of the signal data used in the abnormality determination of the equipment in the monitoring control server;
a priority determination unit that determines the priority of the signal data included in the message acquired by the message acquisition unit based on the abnormality determination related data stored in the abnormality determination related data storage unit;
a message transmitting unit that transmits the message acquired by the message acquiring unit to the monitoring control server, and when the abnormality is resolved after an abnormality occurs in the network, the priority determined by the priority determining unit; the message transmitting unit that transmits the message including the signal data with a high priority to the supervisory control server with priority over the message including the signal data with a low priority;
including ;
The abnormality determination related data is data indicating the number of times each type of signal data is used under abnormality determination conditions used for abnormality determination of the equipment in the monitoring and control server,
The priority determining unit increases the determined priority of the signal data as the number of uses indicated by the abnormality determination related data increases.
Supervisory control system. A gateway device that transmits signal data acquired from equipment placed in equipment to be monitored in a supervisory control system to a supervisory control server that monitors the equipment via a network,
a message acquisition unit that acquires a message including the signal data from the device;
an abnormality determination related data storage unit that stores abnormality determination related data that is data regarding the type of the signal data used in the abnormality determination of the equipment in the monitoring control server;
a priority determination unit that determines the priority of the signal data included in the message acquired by the message acquisition unit based on the abnormality determination related data stored in the abnormality determination related data storage unit;
a message transmitting unit that transmits the message acquired by the message acquiring unit to the monitoring control server, and when the abnormality is resolved after an abnormality occurs in the network, the priority determined by the priority determining unit; the message transmitting unit that transmits the message including the signal data with a high priority to the supervisory control server with priority over the message including the signal data with a low priority;
Equipped with
The abnormality determination related data is data indicating the number of times each type of signal data is used under abnormality determination conditions used for abnormality determination of the equipment in the monitoring and control server,
The priority determining unit increases the determined priority of the signal data as the number of uses indicated by the abnormality determination related data increases.
Gateway device. A method for controlling a gateway device, the method comprising: transmitting signal data acquired from equipment placed in equipment to be monitored in a supervisory control system to a supervisory control server that monitors the equipment via a network;
a message acquisition step in which the gateway device acquires a message including the signal data from the device;
The signal data included in the message acquired in the message acquisition step by the gateway device based on abnormality determination related data that is data regarding the type of signal data used in the monitoring and control server to determine an abnormality of the equipment. a priority determination step for determining the priority of the
a message sending step in which the gateway device sends the message obtained in the message obtaining step to the monitoring control server;
including;
In the message sending step, if the abnormality is resolved after an abnormality occurs in the network, the gateway device assigns the message containing the signal data having the high priority determined in the priority determining step to the priority. transmitting the message to the supervisory control server with priority over the message containing the signal data with a low
The abnormality determination related data is data indicating the number of times each type of signal data is used under abnormality determination conditions used for abnormality determination of the equipment in the monitoring control server,
In the priority determining step, the gateway device increases the determined priority for the signal data as the number of uses indicated by the abnormality determination related data increases.
Control method.

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