JP2019174872A - Information acquisition device, gateway device, program, storage medium, and method - Google Patents

Abstract

To stably acquire a plurality of process data detecting plant operation by a low-speed communication method.SOLUTION: Provided is an information acquisition device 300, program, recording medium and method including: a communication unit 310 that communicates with a gateway device 400 that collects a plurality of process data from a plurality of field devices 10 installed in a plant; a selection unit 330 that selects at least one target process data set to be acquired this time among a plurality of process data sets based on a period to acquire each of the plurality of process data sets including at least one process data among the plurality of process data; and a process data acquisition unit 340 that acquires the selected target process data set from the gateway device via the communication unit.SELECTED DRAWING: Figure 2

Description

  The present invention relates to an information acquisition device, a gateway device, a program, a recording medium, and a method.

Conventionally, for the purpose of detecting and controlling the operation of a plant or the like, a plurality of process data respectively output from a plurality of field devices installed in the plant has been acquired via a gateway device (see, for example, Patent Document 1). ).
Patent Document 1 Japanese Patent Application Laid-Open No. 2015-146562

  Communication between a gateway device and an information acquisition device that acquires process data from the gateway device may use relatively low-speed communication such as serial communication. The information acquisition device acquires a plurality of process data from the gateway device. In some cases, the number of communications increases. As a result of such an increase in the number of communications, for example, in an apparatus (information acquisition apparatus) that acquires process data, processing such as data acquisition and screen display is delayed, and processing operations that should be performed within a certain period of time are not in time. In addition, communication may not be received within a certain period, and communication loss may occur.

  In the first aspect of the present invention, a communication unit that communicates with a gateway device that collects a plurality of process data from a plurality of field devices installed in a plant, and a plurality that includes at least one process data among the plurality of process data A selection unit that selects at least one target process data set to be acquired this time among a plurality of process data sets based on a period in which each of the process data sets is to be acquired, and a target selected via the communication unit An information acquisition device, a program, and a recording medium including a process data acquisition unit that acquires a process data set from a gateway device are provided.

  In the second aspect of the present invention, a data collection unit for collecting a plurality of process data from a plurality of field devices installed in a plant, and a plurality of process data sets including at least one process data among the plurality of process data A data providing unit that provides at least one target process data set to be acquired by the current information acquisition apparatus among the plurality of process data sets to the information acquisition apparatus according to a period in which the information acquisition apparatus acquires each of A gateway device, a program, and a recording medium are provided.

  According to a third aspect of the present invention, there is provided a system method including the first aspect and the second aspect, wherein a gateway device collects a plurality of process data from a plurality of field devices installed in a plant; The information acquisition device communicates with the gateway device, and based on the period in which each of the plurality of process data sets including at least one process data among the plurality of process data is to be acquired, the current one of the plurality of process data sets The information acquisition apparatus selects at least one target process data set to be acquired, and the gateway apparatus provides the information acquisition apparatus with the selected at least one target process data set according to the period. Information acquisition device acquires the target process data set from the gateway device To provide a method and a Rukoto.

  In the fourth aspect of the present invention, a communication unit that communicates with a gateway device that collects a plurality of process data from a plurality of field devices installed in a plant, and a plurality of field devices from the gateway device via the communication unit. An acquisition unit that acquires each of the device information and a plurality of process data sets including at least one process data among the plurality of process data. The acquisition unit includes each of the plurality of process data sets, and the device information Is provided at different timings.

  In the fifth aspect of the present invention, a data collection unit that collects a plurality of process data from a plurality of field devices installed in a plant, device information of each of the plurality of field devices, and a plurality of process data A data providing unit that provides the information acquisition apparatus with a plurality of process data sets including at least one process data, and the data providing unit acquires each of the plurality of process data sets and device information at different timings. Provided is a gateway device provided to the device.

  It should be noted that the above summary of the invention does not enumerate all the necessary features of the present invention. In addition, a sub-combination of these feature groups can also be an invention.

The structural example of the communication system 1000 based on the conventional form is shown with the some field apparatus 10. FIG. The structural example of the communication system 2000 which concerns on this embodiment is shown with the some field apparatus 10. FIG. An example of the operation | movement flow of the communication system 2000 which concerns on this embodiment is shown. An example of the process data mapped to the storage area of the storage unit 420 according to the present embodiment is shown. An example of the process data set concerning this embodiment is shown. An example of a result of communication performed by the communication system 2000 according to the present embodiment is shown together with an example of a communication result of the communication system 1000. 1 shows an exemplary configuration of a computer 1200 in which a plurality of aspects of the present invention can be embodied in whole or in part.

  Hereinafter, the present invention will be described through embodiments of the invention, but the following embodiments do not limit the invention according to the claims. In addition, not all the combinations of features described in the embodiments are essential for the solving means of the invention.

  FIG. 1 shows a configuration example of a communication system 1000 according to a conventional form, together with a plurality of field devices 10. The communication system 1000 acquires a plurality of process data from a plurality of field devices 10 installed in a plant or the like by wireless or wired communication. Here, the plant or the like is at least a part of, for example, a factory facility, a mechanical facility, a production facility, a power generation facility, a storage facility, and a facility at a well site where oil or natural gas is mined. The plant or the like may be at least a part of factory equipment, mechanical equipment, production equipment, power generation equipment, storage equipment, and the like.

  The plurality of field devices 10 have a plurality of sensors and the like, and detect the state of the installed plant. The plurality of field devices 10 detect various states of the plant. The plurality of sensors are, for example, a pressure sensor, a pH sensor, a vibration sensor, a temperature sensor, a flow rate sensor, a corrosion sensor, a strain sensor, a noise sensor, and a gas sensor. The communication system 1000 may acquire the detection results of the plurality of field devices 10 as process data, and may be used for control and monitoring including operation abnormality detection, maintenance, and maintenance. The process data may include a data value status. The communication system 1000 includes an information acquisition device 100 and a gateway device 200.

  The information acquisition device 100 acquires and accumulates process data via the gateway device 200. The information acquisition apparatus 100 may display the acquired process data on an internal or external screen. In addition, the information acquisition apparatus 100 may perform numerical processing or the like on the process data and display it on a screen or the like. The information acquisition apparatus 100 includes a communication unit 110, an acquisition unit 120, and a storage unit 130.

  The communication unit 110 communicates with the gateway device 200. The communication unit 110 communicates with the gateway device 200 at a substantially constant cycle. The communication unit 110 may function as a communication interface with the gateway device 200. The communication unit 110 may communicate with the gateway device 200 in a wired or wireless manner.

  The acquisition unit 120 acquires process data and the like from the gateway device 200 via the communication unit 110. The acquisition unit 120 may acquire device information of the plurality of field devices 10 held by the gateway device 200. The device information includes, for example, setting information of a plurality of field devices 10, information unique to each field device 10, state information of each field device 10, and the like. The acquisition unit 120 acquires process data and device information at a substantially constant cycle.

  The storage unit 130 stores process data and device information acquired by the acquisition unit 120. The storage unit 130 may transmit the stored data to the request source in response to an internal or external request.

  The gateway device 200 collects a plurality of process data from the plurality of field devices 10 and supplies the collected process data to the information acquisition device 100. The gateway device 200 includes a data collection unit 210, a storage unit 220, and a data provision unit 230.

  The data collection unit 210 communicates with a plurality of field devices 10 and collects a plurality of process data. The data collection unit 210 may acquire device information of a plurality of field devices 10. The data collection unit 210 communicates with each of the plurality of field devices 10 at a predetermined cycle for each field device 10. The data collection unit 210 may communicate with a plurality of field devices 10 with which connection has been established. The data collection unit 210 may update the connection with the field device 10 and communicate with a plurality of field devices 10 capable of communication.

  The storage unit 220 stores a plurality of process data and device information collected by the data collection unit 210. When the connection with the plurality of field devices 10 is updated in the storage unit 220, the stored device information may be updated by the data collection unit 210. The storage unit 220 may transmit the stored data to the data providing unit 230 in response to a request from the data providing unit 230.

  The data providing unit 230 communicates with the communication unit 110 and provides a plurality of process data and device information. The data providing unit 230 provides a plurality of process data and device information at a substantially constant cycle. When the amount of data to be provided exceeds the amount of data that can be provided by one communication, the data providing unit 230 may execute communication a plurality of times in one cycle.

  In the communication system 1000 described above, communication between the communication unit 110 and the data providing unit 230 is performed by a relatively low-speed communication method such as serial communication (for example, Modbus). In this case, since it is necessary to perform transmission / reception of a plurality of process data within a limited time, that is, within a certain period, it is desirable to communicate with less frequency. In addition, since the communication cycle of the data collection unit 210 and the plurality of field devices 10 has a plurality of types of cycles according to each of the field devices 10, the communication unit is set to the shortest cycle among the plurality of types of cycles. Communication between 110 and the data providing unit 230 may be performed.

  For example, when the data collection unit 210 collects process data from a plurality of field devices 10 communicating with each of a 1 second period, a 3 second period, an 8 second period, and a 15 second period, the communication unit 110 and the data providing unit During 230, communication is performed with the shortest one-second cycle. Thereby, the information acquisition apparatus 100 can acquire process data from each field device 10 without communication leakage. However, since the information acquisition apparatus 100 acquires process data from a plurality of field devices 10 communicating with a 3-second period, an 8-second period, and a 15-second period at a 1-second period, substantially the same process data is duplicated. May get.

  In this case, for example, if the field device 10 increases and process data to be acquired increases, the number of communications to be executed in one cycle increases, and the information acquisition apparatus 100 performs processing such as data acquisition and screen display. May be delayed. As a result, the communication system 1000 may not be able to keep up with processing operations that should be performed within a certain period of time, and may not be able to receive communication within a certain period, resulting in lost communication. In the communication system 1000, power consumption increases as the number of communication increases.

  Therefore, in the communication system described later in the present embodiment with respect to the communication system 1000 described above, the communication timing between the information acquisition apparatus and the gateway apparatus is changed according to the type of data, thereby reducing the number of communication. In addition, the communication system according to the present embodiment classifies process data into a plurality of types of process data sets according to the period to be acquired, and communicates for each process data set, so that the information acquisition device and the gateway device are communicated. Reduce the number of communications. Such a communication system will be described next. The process data set includes at least one process data, and details thereof will be described later.

  FIG. 2 shows a configuration example of the communication system 2000 according to the present embodiment together with a plurality of field devices 10. The communication system 2000 acquires a plurality of process data from a plurality of field devices 10 installed in a plant or the like for each process data set by wireless or wired communication. The plurality of field devices 10 have been described with reference to FIG. The communication system 2000 includes an information acquisition device 300 and a gateway device 400.

  The information acquisition device 300 acquires and accumulates process data sets from the gateway device 400. The information acquisition apparatus 300 may display the acquired process data set on an internal or external screen. Further, the information acquisition apparatus 300 may perform numerical processing or the like on the process data set and display it on a screen or the like.

  The information acquisition device 300 is at least a part of, for example, a computer (PC), a terminal, a controller such as PLC (Programmable Logic Controller) and RTU (Remote Terminal Unit), a DCS (Distributed Control System), and a data logger. . The information acquisition apparatus 300 includes a communication unit 310, a device information acquisition unit 320, a selection unit 330, a process data acquisition unit 340, and a storage unit 350.

  The communication unit 310 communicates with the gateway device 400. The communication unit 310 may communicate with the gateway device 400 at a plurality of cycles. The communication unit 310 may function as a communication interface with the gateway device 400. The communication unit 310 may communicate with the gateway device 400 in a wired or wireless manner.

  The device information acquisition unit 320 acquires device information from the gateway device 400 via the communication unit 310. The device information acquisition unit 320 may acquire the device information of the gateway device 400 in addition to the device information of the field device 10. The device information acquisition unit 320 may request the gateway device 400 for device information to be acquired. The device information acquisition unit 320 stores the acquired device information in the storage unit 350. Further, the device information acquisition unit 320 may acquire at least a part of the device information and determine whether or not to further acquire at least a part of the remaining device information according to the part of the information. The device information acquisition unit 320 may acquire device information at different timings according to the type of device information.

  The selection unit 330 selects at least one target process data set to be acquired this time among a plurality of process data sets. The selection unit 330 selects a process data set corresponding to the timing at which the communication unit 310 communicates as a target process data set to be acquired. The selection unit 330 selects at least one target process data based on a period in which each of the plurality of process data sets is to be acquired. The selection unit 330 includes an address range designation unit 332.

  The address range specifying unit 332 specifies an address range in which the target process data set to be acquired is stored in the gateway device 400. In other words, the address range specifying unit 332 may specify different address ranges based on the period for acquiring each of the plurality of process data sets.

  The process data acquisition unit 340 acquires the selected target process data set from the gateway device 400 via the communication unit 310. The process data acquisition unit 340 may acquire a target process data set in the address range specified by the address range specification unit 332. In this case, the process data acquisition unit 340 includes data of at least a part of the address range including the selected target process data set in the storage area that stores the plurality of process data sets in the gateway device 400 via the communication unit 310. Is requested to the gateway device 400.

  The storage unit 350 stores the device information acquired by the device information acquisition unit 320 and the process data set acquired by the process data acquisition unit 340. The storage unit 350 may transmit the stored data to the request source in response to an internal or external request.

  The gateway device 400 collects a plurality of process data from a plurality of field devices 10 installed in the plant, and supplies a process data set including the collected process data to the information acquisition device 300. The gateway device 400 includes a data collection unit 410, a storage unit 420, and a data provision unit 430.

  The data collection unit 410 communicates with a plurality of field devices 10 and collects a plurality of process data from the plurality of field devices 10. In addition, the data collection unit 410 may acquire device information of a plurality of field devices 10. The data collection unit 410 communicates with each of the plurality of field devices 10 for each field device 10 at a predetermined cycle. The data collection unit 410 may communicate with a plurality of field devices 10 with which connection has been established. The data collection unit 410 may update the connection with the field device 10 and communicate with a plurality of field devices 10 capable of communication. The data collection unit 410 includes an address range setting unit 412.

  The address range setting unit 412 may be capable of setting an address range for storing each of a plurality of process data sets in the storage area of the storage unit 420. The address range setting unit 412 may set an address range in which the process data set is stored based on a period in which the information acquisition apparatus 300 should acquire each of the plurality of process data sets. The address range setting unit 412 may specify a different address range based on the period to be acquired.

  The storage unit 420 stores a plurality of process data and device information collected by the data collection unit 410. The storage unit 420 has a storage area for storing a plurality of process data sets including at least one of a plurality of process data. For example, the storage unit 420 stores each process data of the process data set in the address range specified by the address range setting unit 412. Each of the plurality of process data sets may be stored in the storage area of the storage unit 420 such that one process data set corresponds to one address range. Note that one address range may have an area that overlaps with another address range.

  The storage unit 420 may further store device information including at least one of setting information, device specific information, and device state of each of the plurality of field devices 10 in the storage area. The setting information may be registration information of the field device 10. Further, the setting information may include setting information of the gateway device 400. The device specific information may be information such as the model name, vendor name, serial number, version, and role of the I / O and router of the field device 10. The device status includes the communication status of the field device 10 with the gateway device 400 (for example, communication quality, received signal level, process data reachability), battery status, remaining battery level, sensor status, device failure information, and maintenance information. Etc. Information may be sufficient. The device status may include information on the status of the gateway device 400.

  In addition, the storage unit 420 may store device information including setting change information whose value changes according to the change of the setting information in the storage area. The setting change information may be generated and updated by the data collection unit 410. Further, the setting change information may be generated and updated in accordance with an instruction from the information acquisition apparatus 300 or the like. For example, when the connection with a plurality of field devices 10 is updated, the stored setting change information may be updated by the data collection unit 410.

  The setting change information may be, for example, a setting code whose value changes according to a change in the number of field devices 10 communicating with the data collection unit 410, an update cycle, a device tag, a setting of the gateway itself, or the like. . The setting code may be a CRC (Cyclic Redundancy Check) generated according to the setting information, a hash key, or the like. The setting change information may include setting number information indicating the number of times the setting code or the like has been rewritten.

  The data providing unit 430 communicates with the communication unit 310 to provide a plurality of process data sets and device information. The data providing unit 430 selects at least one target process data set to be acquired by the current information acquisition apparatus 300 from among the plurality of process data sets according to a period in which the information acquisition apparatus 300 acquires each of the plurality of process data sets. Is provided to the information acquisition apparatus 300. For example, the data providing unit 430 receives the designation of the target process data set to be acquired this time selected by the selection unit 330 based on the cycle in which each of the plurality of process data sets should be acquired. The process data set is provided to the information acquisition device 300.

  In this case, the data providing unit 430 receives the specification of at least a part of the address range including the target process data set in the storage area of the storage unit 420 from the address range specifying unit 332, and the address range in the storage area Is provided to the information acquisition apparatus 300. The data providing unit 430 may provide different process data sets to the communication unit 110 at different timings in one cycle.

  Further, the data providing unit 430 may provide device information corresponding to the request from the device information acquiring unit 320 to the communication unit 310. In addition, the data providing unit 430 may provide at least device state information among the information included in the device information to the communication unit 310 at a substantially constant cycle. The data providing unit 430 may provide the device state information to the communication unit 310 at a substantially constant cycle that is the same as the communication cycle of the process data set or slower than the communication cycle of the process data set. Next, the operation of the communication system 2000 in the present embodiment will be described.

  FIG. 3 shows an example of an operation flow of the communication system 2000 according to the present embodiment. The communication system 2000 acquires a plurality of process data from the plurality of field devices 10 by executing the operation flow shown in FIG. Note that the gateway device 400 is in communication with a plurality of field devices 10.

  First, the device information acquisition unit 320 acquires first device information from the gateway device 400 (S510). The first device information may be setting change information included in the device information. That is, the device information acquisition unit 320 acquires information corresponding to the settings of the plurality of field devices 10 and the gateway device 400 with which the gateway device 400 is communicating as first device information.

  Next, the device information acquisition unit 320 compares the acquired first device information with the first device information acquired in the past (S520). For example, the device information acquisition unit 320 reads past first device information stored in the storage unit 350 and compares it with the first device information acquired in the past. When the acquired first device information and the first device information acquired in the past do not match (S520: No), the device information acquisition unit 320 acquires the second device information from the gateway device 400 (S530). The second device information may be all or a part of the setting information included in the device information.

  As described above, the device information acquisition unit 320 sets the value of the setting change information stored in the gateway device 400 for one field device 10 among the plurality of field devices 10 as the setting change that the information acquisition device 300 previously acquired. The setting information of one field device 10 may be acquired according to the difference from the information value.

  In addition, the device information acquisition unit 320 acquires third device information from the gateway device 400 (S535). The third device information may be device specific information.

  In addition, when the acquired first device information matches the first device information acquired in the past (S520: Yes), the device information acquisition unit 320 omits the acquisition of the second device information and the third device information. As described above, the device information acquisition unit 320 reconnects with the gateway device 400 connected in the past, and if there is no change in the connection mode and the current connection mode of the past gateway device 400 and the plurality of field devices 10, the past It is possible to prevent the setting information substantially the same as the acquired setting information from being acquired again, and to reduce the number of communications with the gateway device 400.

  Next, the process data acquisition unit 340 acquires a process data set from the gateway device 400 (S540). The process data acquisition unit 340 may request the gateway device 400 to return data in the address range specified by the address range specification unit 332 corresponding to the target process data set selected by the selection unit 330.

  Here, the device information acquisition unit 320 may acquire device state information. The device information acquisition unit 320 may acquire device state information at the same cycle as the cycle in which the process data acquisition unit 340 acquires the process data set. Instead, the device information acquisition unit 320 may acquire the device state information at a cycle longer than the cycle at which the process data acquisition unit 340 acquires the process data set. In this case, it is desirable that the device information acquisition unit 320 acquires the device state information at a cycle that is an integral multiple of the cycle at which the process data acquisition unit 340 acquires the process data set.

  In step S540, the device information acquisition unit 320 does not have to acquire device information (for example, setting information, device specific information, and device state information). In this case, the device information is acquired in steps S510, S530, and S535, and each of the process data sets is acquired in step S540. Therefore, the acquisition timings of the device information and the process data sets are different. . Therefore, as a result of the communication timing between the information acquisition device 300 and the gateway device 400 being different depending on the type of data, various data can be acquired at the required timing, and the number of communications is reduced.

  When the device information acquisition unit 320 acquires the device state information, the device information acquisition unit 320 checks the device state information (for example, information indicating the communication state between the field device 10 and the gateway device 400), and the gateway device 400 and the new device state. It is determined whether or not a connection with the field device 10 has been established (S550). The new field device 10 may be the field device 10 that has previously communicated with the gateway device 400, or may be the field device 10 that has communicated with the gateway device 400 for the first time. When it is determined that the connection between the gateway device 400 and the new field device 10 has been established (S550: Yes), the device information acquisition unit 320 displays third device information (device-specific information as an example) of the new field device 10 ) Is stored in the storage unit 350 (S560). In other words, the device information acquisition unit 320 acquires the third device information in the past from the new field device 10 connected this time, and confirms whether or not the process data has been acquired.

  If the third device information of the new field device 10 is not stored in the storage unit 350 (S560: Yes), the device information acquisition unit 320 returns to S535 and returns to the third device of the new field device 10. Get information. Thus, when the connection between the gateway device 400 and the one field device 10 is newly established, the device information acquisition unit 320 determines that the device specific information (third device information) of the one field device 10 is the information acquisition device. In response to the fact that 300 is not included in the previously acquired device information, the device specific information of one field device 10 may be acquired.

  When the device information acquisition unit 320 determines that the third device information of the new field device 10 is stored in the storage unit 350 (S560: No), the process data acquisition unit 340 acquires the new field device 10 A process data set including at least one of a plurality of process data from the plurality of field devices 10 is acquired from the gateway device 400 (S540). Thus, if the device specific information is acquired and stored when the field device 10 is connected, the device information acquisition unit 320 stores the device specific information once unless the device specific information of the field device is changed. It is only necessary to acquire it, and the number of communication can be reduced.

  When it is determined that the connection between the gateway device 400 and the new field device 10 has not been established (S550: No), the process proceeds to step S570, and the communication system 2000 ends the acquisition of the process data set (S570: Yes). ), The operation from S540 to S570 may be repeated. When the process data acquisition unit 340 repeatedly acquires the process data set, the process data acquisition unit 340 may acquire the current process data set after a predetermined period has elapsed from the previous process data set acquisition timing. Thereby, the process data acquisition part 340 can acquire a process data set with a substantially fixed period.

  As described above, the communication system 2000 can transmit a process data set from the gateway device 400 to the information acquisition device 300 while detecting a new connection of the field device 10. In addition, the device information acquisition unit 320 acquires the device information of each of the plurality of field devices 10 at a timing different from the acquisition timing of each of the plurality of process data sets. The device information acquisition unit 320 acquires the setting information when the setting change information does not match, and acquires the device specific information that is not stored in the storage unit 350 from the gateway device 400. Duplicate acquisition of stored device information can be reduced.

  Further, the communication system 2000 can further reduce communication of overlapping process data by transmitting and receiving process data in units of process data sets. The process data set is a combination of a plurality of process data designated by an address range in the process data mapped in a predetermined format in the storage area of the gateway device 400. First, the process data mapping will be described next.

  FIG. 4 shows an example of process data mapped to the storage area of the storage unit 420 of the gateway device 400 according to the present embodiment. FIG. 4 shows a schematic configuration of a data array in the storage area with the vertical direction as an address value. In the storage area, header information including information on the number of the plurality of field devices 10 and process data collected from the plurality of field devices 10 are mapped for each predetermined address range. FIG. 4 shows an example in which header information is stored in the head address range.

  The header information is obtained by classifying the plurality of field devices 10 on the basis of the respective periods (that is, update periods) in which the data collection unit 410 collects process data from the plurality of field devices 10, and the number of the field devices 10 thus classified. Information is stored. For example, the first byte of the header information stores the number of field devices 10 whose update cycle is 1 second or more and less than 4 seconds. In the second byte, the number of field devices 10 having an update cycle of 4 seconds or more and less than 8 seconds is stored. In the third byte, the number of field devices 10 having an update cycle of 8 seconds or more and less than 16 seconds is stored. In the fourth byte, the number of field devices 10 having an update cycle of 16 seconds or more and less than 32 seconds is stored. In the fifth byte, the number of field devices 10 whose update cycle is 32 seconds or more is stored.

  As described above, as an example, the address range in which the header information is stored stores information on the number of field devices 10 included in the classification with a short update cycle in order from the first byte. Note that the data array of the header information shown in FIG. 4 is an example, and the present invention is not limited to this. The header information may be arranged in a predetermined order. For example, the header information may be arranged in the order of classification with a long update cycle.

  As shown in FIG. 4, when the field device 10 is classified by the update cycle, the information acquisition device 300 acquires the process data of the classified field device 10 from the gateway device 400 at a cycle according to the classification. Good. If the information acquisition device 300 acquires, for example, the process data of the field device 10 whose update cycle is classified into 1 second or more and less than 4 seconds from the gateway device 400 in a 1-second cycle, the information acquisition apparatus 300 leaks communication with the update cycle. Process data can be acquired. In addition, if the information acquisition device 300 acquires the process data of the field device 10 whose update cycle is 4 seconds or more and less than 8 seconds from the gateway device 400 at a cycle of 4 seconds, the information acquisition device 300 does not communicate with the update cycle. Process data can be acquired.

  As described above, the communication system 2000 according to the present embodiment classifies the plurality of field devices 10 in the range of the update cycle, and sets the process data of the classified field devices 10 to the minimum in the update cycle range to which the field device 10 belongs. Is acquired from the gateway device 400 at the update cycle. Accordingly, process data is acquired at a shorter acquisition cycle from the field device 10 having a longer update cycle in accordance with the other field devices 10 having a shorter update cycle.

  Similarly, the information acquisition device 300 has a period of 8 seconds from the field device 10 classified in the update cycle range of the third byte and 16 seconds from the field device 10 classified in the range of the update cycle of the fourth byte. The process data may be respectively acquired at a cycle of 32 seconds from the field device 10 that is classified into the update cycle range of the fifth byte. As described above, the information acquisition device 300 acquires the process data of the corresponding field device 10 from the gateway device 400 in a plurality of cycles according to the update cycle of the plurality of field devices 10. As described above, the process data of the plurality of field devices 10 are classified in different update cycle ranges (for example, 1 second cycle, 4 second cycle, 8 second cycle, etc.), and the process data is acquired for each classified update cycle. Therefore, the number of communications can be reduced as compared with a case where process data of a plurality of field devices 10 is acquired with one minimum update cycle (for example, 1 second cycle).

  Here, it is desirable that the plurality of cycles be a natural number multiple of a cycle in which each cycle is smaller. For example, in the example of FIG. 4, the plurality of periods are 1 second, 4 seconds, 8 seconds, 16 seconds, and 32 seconds, which is a natural number multiple of the minimum period. Thereby, the information acquisition apparatus 300 can acquire process data using a plurality of cycles synchronized with the minimum cycle. For example, the information acquisition apparatus 300 executes the process data acquisition operation at a predetermined cycle such as a one-second cycle. And the information acquisition apparatus 300 acquires process data from the field device 10 classified in the range of the update cycle of the first byte in the 1 second cycle. In addition, the information acquisition apparatus 300 may acquire process data from the field device 10 classified in the update cycle range of the second byte at a timing of every 4 seconds, that is, every 4 seconds of 1 second cycle.

  That is, the information acquisition apparatus 300 executes the process data acquisition operation at a predetermined cycle, and among the acquisition timings corresponding to the one cycle, the timing to be acquired corresponding to the update cycle of the field device 10 (In other words, in the corresponding cycle), the process data of the field device 10 may be acquired from the gateway device 400. Thereby, the information acquisition apparatus 300 can acquire the process data of the plurality of field devices 10 from the gateway apparatus 400 as process data sets at a substantially constant cycle. As described above, the process data set is a collection of process data of a plurality of field devices belonging to a corresponding one period among a plurality of periods, and the information acquisition apparatus 300 performs the following for each period. A process data set belonging to the cycle is acquired.

  The process data set includes one or a plurality of process data depending on the connection form of the gateway device 400 and the plurality of field devices 10.

  Here, the process data is preferably mapped to a storage area of the storage unit 420 for each process data set. For example, a plurality of predetermined address ranges in the storage area are arranged corresponding to the process data set. The plurality of address ranges may be arranged in order of the corresponding plurality of periods.

  FIG. 4 shows an example in which process data collected from a plurality of field devices 10 is arranged next to header information. The process data includes an ID of the field device 10, a sequence number, a diagnosis status, a process value type (Data Type), a process value state (status), a process value, and the like, and is arranged in a predetermined order. FIG. 4 shows an example in which such process data is arranged in ascending order of update cycle of the field device 10 as the collection source.

  In this case, the process data collected from the field device 10 classified in the first byte of the header information is arranged next to the header information, and the set of the process data is set as a first process data set (for example, 1 If the number of field devices 10 in the byte is three, the process data of the three field devices 10 is the first process data set). That is, a data range in which process data corresponding to the number of the first byte of header information is arranged next to the header information is set as a first address range. Then, after the first process data set, the process data collected from the field device 10 classified in the second byte of the header information is arranged, and the second process data is combined with the first process data set. As a set, this data range is set as the second address range.

  As described above, the storage unit 420 stores at least one process data set in the storage area among the plurality of process data sets in each of the plurality of address ranges corresponding to each of the plurality of cycles. That is, the data collection unit 410 may store the process data acquired from the plurality of field devices 10 in the storage unit 420 as a process data set in a corresponding address range set by the address range setting unit 412. An example of such a process data set will now be described.

  FIG. 5 shows an example of a process data set according to the present embodiment. FIG. 4 shows a schematic configuration of a data array in the storage area with the vertical direction as an address value. FIG. 5 shows an example in which header information is stored in the head address range. Then, after the header information, the first process data set is stored. FIG. 5 shows an example in which the address range of the first process data set is “Area1”. That is, the number of the first byte of the header information is 3, and the process data acquired from the three field devices 10 is stored in the address range “Area1” as the first process data set. The process data set is acquired from the gateway device 400 at a cycle of 1 second.

  The process data acquired from the two field devices 10 from the next address of the first process data set is stored, and the process data including the first process data set is defined as the second process data set. That is, the number of the second byte of the header information is 2, and the process data acquired from a total of 5 field devices 10 including the 3 of the first process data set is the address range as the second process data set. Stored in “Area2”, the information acquisition apparatus 300 acquires the process data set from the gateway apparatus 400 at a cycle of 2 seconds.

  Similarly, FIG. 5 shows that the third process data set acquired from 10 field devices 10 in a cycle of 4 seconds is stored in the address range “Area3” and acquired from 15 field devices 10 in a cycle of 8 seconds. The fourth process data set to be stored is stored in the address range “Area 4”, and the fifth process data set acquired from the 17 field devices 10 in the cycle of 16 seconds is stored in “Area 5”, in the cycle of 32 seconds. An example is shown in which the sixth process data set acquired from the 20 field devices 10 is stored in the address range “Area6”.

  Thus, the gateway apparatus 400 stores the process data set to be transmitted to the information acquisition apparatus 300 corresponding to a plurality of cycles in the address range of consecutive addresses. Thereby, the information acquisition apparatus 300 can acquire a process data set easily by designating the said address range as an object process data set according to a period. In other words, the process data acquisition unit 340 has address range data including an address range corresponding to one cycle in the storage area at a timing at which at least one process data set corresponding to one cycle among a plurality of cycles is to be acquired. Is requested to the gateway device 400.

  That is, the address range designation unit 332 designates the gateway device 400 with an address range for storing each of the plurality of process data sets in the storage area of the storage unit 420 based on the period at which each of the plurality of process data sets should be acquired. To do. For example, the process data acquisition unit 340 requests the gateway device 400 to return the data in the address range “Area1” at one timing in a 1-second cycle in accordance with the designation by the address range designation unit 332.

  The data providing unit 430 may provide the information acquisition device 300 with the data in the address range in the storage area in response to receiving the return request for the data in the address range from the information acquisition device 300. That is, the data providing unit 430 provides data of the address range “Area1” to the information acquisition apparatus 300.

  Further, the process data acquisition unit 340 includes each address range corresponding to each of the periods equal to or less than one period at a timing at which at least one process data set corresponding to the one period is to be acquired, and includes one period. The gateway apparatus 400 is requested to return data in an address range that does not include each address range corresponding to each of the exceeding periods. For example, the process data acquisition unit 340 receives “Area2” including the address range “Area1” at the next timing in the 1-second period, that is, the timing corresponding to the 2-second period in accordance with the designation by the address range designation unit 332. The gateway apparatus 400 is requested to return data.

  The data providing unit 430 may provide the information acquisition device 300 with the data in the address range in the storage area in response to receiving the return request for the data in the address range from the information acquisition device 300. That is, the data providing unit 430 provides data of the address range “Area2” to the information acquisition apparatus 300.

  Similarly, the process data acquisition unit 340 sequentially selects “Area1”, “Area2”, “Area1”, “Area3”, “Area1”, “Area2”, “Area1”, “Area4”, The gateway device 400 may be requested to return data in the address range such as. As a result, the amount of communication data is reduced, and it becomes easier to complete data acquisition within a period in which process data should be acquired. Further, the data providing unit 430 may provide the information acquisition apparatus 300 with data in the requested address range in the order of request in the 1 second period.

  Note that the storage area of the storage unit 420 stores device information including at least one of setting information, device specific information, and device state of each of the plurality of field devices 10 and a plurality of process data sets from the plurality of field devices 10. May be stored in an address range outside the address range in which is stored. Thus, device information with a low access frequency and process data sets with a high access frequency can be stored and managed in different address ranges. The data providing unit 430 provides data in the address range in response to a request for device information.

  The communication system 2000 according to the above-described embodiment arranges process data to be acquired in an address range of continuous addresses as a process data set, and exchanges a corresponding process data set for each timing in one cycle. Next, the result of the process data set exchanged by the communication system 2000 will be described.

  FIG. 6 illustrates an example of a result of communication performed by the communication system 2000 according to the present embodiment, together with an example of a communication result of the communication system 1000. FIG. 6 shows a communication example of the communication system 2000 in a column “when compressed” and a communication example of the communication system 1000 in a column “not compressed”. FIG. 6 shows an example in which the communication system 1000 and the communication system 2000 exchange process data at a cycle of 1 second.

  The communication system 1000 shows an example in which the information acquisition device 100 acquires all the process data from the gateway device 200 every second in accordance with the cycle of 1 second, which is the shortest update cycle among the plurality of field devices 10. That is, the information acquisition apparatus 100 acquires data in the address range “Area6” from the gateway apparatus 200 every second. Here, for example, it is assumed that the data amount in the address range from “Area1” to “Area3” falls within the capacity (for example, 125 words) that can be transmitted and received in one communication. Further, the data amount in the address range from “Area 4” to “Area 6” does not fall within the capacity range that can be transmitted and received by one communication, and is the data amount that can be transmitted and received by two communication.

  In this case, the communication system 1000 performs communication twice per second. Therefore, in the example of FIG. 6, it can be seen that the communication system 1000 needs 64 communications to transmit and receive process data for 32 seconds.

  In contrast, in the example of the communication system 2000 according to the present embodiment, the information acquisition apparatus 300 selects a process data set to be acquired every second and acquires the process data set from the gateway apparatus 400. That is, the information acquisition apparatus 300 acquires data in the corresponding address range from the address ranges “Area 1” to “Area 6” every second from the gateway apparatus 400. Therefore, when the information acquisition apparatus 300 designates any one of the address ranges “Area 1” to “Area 3”, a corresponding process data set can be acquired with one communication count.

  Thereby, in the example of FIG. 6, it turns out that the communication system 2000 can be performed by 36 times transmission / reception of process data for 32 seconds. That is, the communication system 2000 according to the present embodiment can transmit and receive process data by reducing the number of communication between the information acquisition apparatus 300 and the gateway apparatus 400 even when a relatively low-speed communication method is used. it can. As a result, the communication system 2000 can prevent the processing such as data acquisition and screen display from being delayed, the processing operation from being in time, and the occurrence of communication loss and the like.

  Moreover, since the frequency | count of communication of the information acquisition apparatus 300 and the gateway apparatus 400 can be reduced, power consumption can be reduced. In this case, for example, the information acquisition device 300 and the gateway device 400 can be battery-driven. In the communication system 2000 according to the present embodiment, the information acquisition device 300 and the gateway device 400 have been described as independent devices. However, the information acquisition device 300 and the gateway device 400 are not limited to this. May be formed as one device. Thus, even when formed as a single device, it can be battery driven.

  The communication system 2000 according to the present embodiment has been described with reference to an example in which each address range of a plurality of process data sets includes an area overlapping with another address range as illustrated in FIG. There is nothing. For example, the storage area of the storage unit 420 may arrange a plurality of address ranges in the order of addresses without overlapping address ranges. In this case, for example, the first address to the second address may be “Area 1”, and the third address to the fourth address next to the second address may be “Area 2”.

  Moreover, although the storage area of the memory | storage part 420 demonstrated the example which arranges process data in order with a small cycle which should be acquired, it is not limited to this. For example, the process data may be arranged in the storage area in descending order of the period to be acquired.

  FIG. 7 shows a configuration example of a computer 1200 in which a plurality of aspects of the present invention can be embodied in whole or in part. The program installed in the computer 1200 causes the computer 1200 to function as an operation associated with the apparatus according to the embodiment of the present invention or one or more “units” of the apparatus, or to perform the operation or the one or more “parts”. Can be executed and / or the computer 1200 can execute a process according to an embodiment of the present invention or a stage of the process. Such a program may be executed by CPU 1212 to cause computer 1200 to perform certain operations associated with some or all of the blocks in the flowcharts and block diagrams described herein. Further, the process according to the embodiment of the present invention or the stage of the process may be executed on the cloud.

  A computer 1200 according to this embodiment includes a CPU 1212, a RAM 1214, a graphic controller 1216, and a display device 1218, which are connected to each other by a host controller 1210. The computer 1200 also includes input / output units such as a communication interface 1222, a hard disk drive 1224, a DVD-ROM drive 1226, and an IC card drive, which are connected to the host controller 1210 via the input / output controller 1220. The computer also includes legacy input / output units such as ROM 1230 and keyboard 1242, which are connected to input / output controller 1220 via input / output chip 1240.

  The CPU 1212 operates according to programs stored in the ROM 1230 and the RAM 1214, thereby controlling each unit. The graphic controller 1216 acquires image data generated by the CPU 1212 in a frame buffer or the like provided in the RAM 1214 or the graphic controller 1216 itself, and causes the image data to be displayed on the display device 1218.

  The communication interface 1222 communicates with other electronic devices via a network. The hard disk drive 1224 stores programs and data used by the CPU 1212 in the computer 1200. The DVD-ROM drive 1226 reads a program or data from the DVD-ROM 1201 and provides the program or data to the hard disk drive 1224 via the RAM 1214. The IC card drive reads programs and data from the IC card and / or writes programs and data to the IC card.

  The ROM 1230 stores therein, for example, a boot program executed by the computer 1200 at the time of activation and / or a program depending on the hardware of the computer 1200. The input / output chip 1240 may also connect various input / output units to the input / output controller 1220 via a parallel port, a serial port, a keyboard port, a mouse port, and the like.

  The program is provided by a computer-readable storage medium such as a DVD-ROM 1201 or an IC card. The program is read from a computer-readable storage medium, installed in the hard disk drive 1224, the RAM 1214, or the ROM 1230, which is also an example of a computer-readable storage medium, and executed by the CPU 1212. Information processing described in these programs is read by the computer 1200 to bring about cooperation between the programs and the various types of hardware resources. An apparatus or method may be configured by implementing information operations or processing in accordance with the use of computer 1200.

  For example, when communication is performed between the computer 1200 and an external device, the CPU 1212 executes a communication program loaded in the RAM 1214 and performs communication processing on the communication interface 1222 based on the processing described in the communication program. You may order. The communication interface 1222 reads the transmission data stored in the transmission buffer area provided in the recording medium such as the RAM 1214, the hard disk drive 1224, the DVD-ROM 1201, or the IC card under the control of the CPU 1212, and the read transmission. Data is transmitted to the network or received data received from the network is written into a reception buffer area provided on the recording medium.

  Further, the CPU 1212 allows the RAM 1214 to read all or a necessary part of a file or database stored in an external recording medium such as a hard disk drive 1224, a DVD-ROM drive 1226 (DVD-ROM 1201), an IC card, etc. Various types of processing may be performed on the data on the RAM 1214. The CPU 1212 may then write back the processed data to an external recording medium.

  Various types of information, such as various types of programs, data, tables, and databases, may be stored on a recording medium to be processed. The CPU 1212 describes various types of operations, information processing, conditional judgment, conditional branching, unconditional branching, and information retrieval that are described throughout the present disclosure for data read from the RAM 1214 and specified by the instruction sequence of the program. Various types of processing may be performed, including / replacement, etc., and the result is written back to RAM 1214. In addition, the CPU 1212 may search for information in files, databases, etc. in the recording medium. For example, when a plurality of entries each having the attribute value of the first attribute associated with the attribute value of the second attribute are stored in the recording medium, the CPU 1212 selects the first entry from the plurality of entries. The entry that matches the condition for which the attribute value of the attribute is specified is retrieved, the attribute value of the second attribute stored in the entry is read, and the first attribute that satisfies the predetermined condition is thereby read. The attribute value of the associated second attribute may be obtained.

  The program or software module according to the above description may be stored in a computer-readable storage medium on the computer 1200 or in the vicinity of the computer 1200. In addition, a recording medium such as a hard disk or a RAM provided in a server system connected to a dedicated communication network or the Internet can be used as a computer-readable storage medium, whereby the program is transmitted to the computer 1200 via the network. provide.

  As mentioned above, although this invention was demonstrated using embodiment, the technical scope of this invention is not limited to the range as described in the said embodiment. It will be apparent to those skilled in the art that various modifications or improvements can be added to the above-described embodiment. It is apparent from the scope of the claims that the embodiments added with such changes or improvements can be included in the technical scope of the present invention.

  The order of execution of each process such as operations, procedures, steps, and stages in the apparatus, system, program, and method shown in the claims, the description, and the drawings is particularly “before” or “prior to”. It should be noted that the output can be realized in any order unless the output of the previous process is used in the subsequent process. Regarding the operation flow in the claims, the description, and the drawings, even if it is described using “first”, “next”, etc. for convenience, it means that it is essential to carry out in this order. It is not a thing.

10 field device, 100 information acquisition device, 110 communication unit, 120 acquisition unit, 130 storage unit, 200 gateway device, 210 data collection unit, 220 storage unit, 230 data provision unit, 300 information acquisition device, 310 communication unit, 320 device Information acquisition unit, 330 selection unit, 332 address range specification unit, 340 process data acquisition unit, 350 storage unit, 400 gateway device, 410 data collection unit, 412 address range setting unit, 420 storage unit, 430 data provision unit, 1000 communication System, 1200 computer, 1201 DVD-ROM, 1210 host controller, 1212 CPU, 1214 RAM, 1216 graphic controller, 1218 display device, 1220 input / output controller, 12 2 communication interface, 1224 hard disk drive, 1226 DVD-ROM drive, 1230 ROM, 1240 input-output chip, 1242 keyboard, 2000 communication system

Claims (27)

A communication unit that communicates with a gateway device that collects a plurality of process data from a plurality of field devices installed in a plant;
Based on a period in which each of a plurality of process data sets including at least one process data among the plurality of process data is to be acquired, at least one target process data set to be acquired this time among the plurality of process data sets is determined. A selection section to select;
An information acquisition device comprising: a process data acquisition unit that acquires the selected target process data set from the gateway device via the communication unit.   The process data acquisition unit is configured to store data of at least a part of an address range including the selected target process data set in a storage area for storing the plurality of process data sets in the gateway device via the communication unit. The information acquisition apparatus according to claim 1, wherein the gateway apparatus requests return. The storage area stores at least one process data set of the plurality of process data sets in each of a plurality of address ranges corresponding to each of a plurality of cycles,
The process data acquisition unit includes an address range including an address range corresponding to the one cycle in the storage area at a timing to acquire at least one process data set corresponding to one cycle among the plurality of cycles. The information acquisition device according to claim 2, wherein the gateway device is requested to return data. The process data acquisition unit includes each address range corresponding to each of the periods equal to or less than the one period at a timing at which at least one process data set corresponding to the one period is to be acquired, and the one period The information acquisition device according to claim 3, wherein the gateway device is requested to return data in an address range that does not include each address range corresponding to each period exceeding.   The information acquisition apparatus according to claim 3 or 4, wherein the plurality of address ranges are arranged in order of the size of the corresponding plurality of periods.   The information acquisition device according to any one of claims 3 to 5, wherein the plurality of cycles are natural numbers times a cycle in which each cycle is smaller.   The selection unit specifies an address range for storing each of the plurality of process data sets in the storage area in the gateway device based on a cycle in which each of the plurality of process data sets is to be acquired. The information acquisition apparatus according to claim 2, comprising: The gateway device further stores device information including at least one of setting information, device specific information, and device status of each of the plurality of field devices in the storage area,
The information acquisition device according to any one of claims 2 to 7, further comprising a device information acquisition unit that acquires the device information from the gateway device via the communication unit.   The storage area has an address range for storing the device information of each of the plurality of field devices outside an address range for storing the plurality of process data sets from the plurality of field devices. Information acquisition device.   The information acquisition apparatus according to claim 8, wherein the device information acquisition unit acquires the device information of each of the plurality of field devices at a timing different from the acquisition timing of each of the plurality of process data sets. The gateway device stores the device information including setting information of each of the plurality of field devices and setting change information whose value changes according to the change of the setting information in the storage area,
The device information acquisition unit, for one field device among the plurality of field devices, the value of the setting change information stored in the gateway device is the value of the setting change information previously acquired by the information acquisition device. The information acquisition device according to any one of claims 8 to 10, wherein the setting information of the one field device is acquired in accordance with a difference between the information and the field information. A data collection unit for collecting a plurality of process data from a plurality of field devices installed in the plant;
The current information acquisition device of the plurality of process data sets obtains each of the plurality of process data sets including at least one process data of the plurality of process data according to a cycle in which the information acquisition device obtains each. A gateway device comprising: a data providing unit that provides at least one target process data set to be provided to the information acquisition device.   The data providing unit selects the target process data set to be acquired this time among the plurality of process data sets selected by the information acquisition device based on a period in which each of the plurality of process data sets is to be acquired. The gateway device according to claim 12, wherein the target process data set is provided to the information acquisition device in response to receiving the request. A storage unit having a storage area for storing the plurality of process data sets;
The data providing unit receives data of the address range in the storage area in response to receiving specification of at least a part of the address range including the target process data set in the storage area from the information acquisition device. The gateway device according to claim 13, which is provided to an acquisition device. The storage unit stores, in the storage area, at least one process data set among the plurality of process data sets in each of a plurality of address ranges corresponding to each of a plurality of cycles.
The data providing unit includes the address range including an address range corresponding to the one cycle in the storage area at a timing at which at least one process data set corresponding to one cycle among the plurality of cycles is to be acquired. The gateway device according to claim 14, wherein, in response to receiving the designation from the information acquisition device, data of the address range in the storage area is provided to the information acquisition device.   The data providing unit includes each address range corresponding to each of the periods equal to or less than the one period at a timing at which at least one process data set corresponding to the one period is to be acquired, and includes the one period. The data of the address range in the storage area is provided to the information acquisition device in response to receiving from the information acquisition device the designation of an address range that does not include each address range corresponding to each of the exceeding periods. Item 16. The gateway device according to Item 15.   The gateway device according to claim 15 or 16, wherein the plurality of address ranges are arranged in order of the size of the corresponding plurality of periods.   The gateway device according to any one of claims 15 to 17, wherein the plurality of cycles are natural number times a cycle in which each cycle is smaller.   An address range setting unit capable of setting an address range for storing each of the plurality of process data sets in the storage area based on a period in which the information acquisition device should acquire each of the plurality of process data sets; The gateway device according to any one of claims 14 to 18.   The gateway device according to any one of claims 14 to 19, wherein the storage unit further stores device information including at least one of setting information, device specific information, and device state of each of the plurality of field devices. . Computer
A communication unit that communicates with a gateway device that collects a plurality of process data from a plurality of field devices installed in a plant;
Based on a cycle in which each of a plurality of process data sets including at least one process data among the plurality of process data is to be acquired, at least one target process data set to be acquired this time among the plurality of process data sets is determined. A selection section to select;
A program that functions as an information acquisition device comprising: a process data acquisition unit that acquires the selected target process data set from the gateway device via the communication unit. Computer
A communication unit that communicates with a gateway device that collects a plurality of process data from a plurality of field devices installed in a plant;
Based on a period in which each of a plurality of process data sets including at least one process data among the plurality of process data is to be acquired, at least one target process data set to be acquired this time among the plurality of process data sets is determined. A selection section to select;
The recording medium which recorded the program which functions as an information acquisition apparatus provided with the process data acquisition part which acquires the said target process data set selected from the said gateway apparatus via the said communication part. Computer
A data collection unit that collects multiple process data from multiple field devices installed in the plant;
The current information acquisition device of the plurality of process data sets obtains each of a plurality of process data sets including at least one process data of the plurality of process data according to a period at which the information acquisition device obtains each of the plurality of process data sets. And a data providing unit that provides at least one target process data set to the information acquisition device. Computer
A data collection unit for collecting a plurality of process data from a plurality of field devices installed in the plant;
The current information acquisition device of the plurality of process data sets obtains each of the plurality of process data sets including at least one process data of the plurality of process data according to a cycle in which the information acquisition device obtains each. The recording medium which recorded the program which functions as a gateway apparatus provided with the data provision part which provides the said information acquisition apparatus with the at least 1 object process data set which should be. A method of a system including an information acquisition device and a gateway device,
The gateway device collects a plurality of process data from a plurality of field devices installed in a plant;
The information acquisition device communicates with the gateway device;
Based on a cycle in which each of a plurality of process data sets including at least one process data among the plurality of process data is to be acquired, at least one target process data set to be acquired this time among the plurality of process data sets is determined. The information acquisition device selects,
The gateway device provides the information acquisition device with the selected at least one target process data set according to the period;
The information acquisition apparatus acquires the provided target process data set from the gateway apparatus. A communication unit that communicates with a gateway device that collects a plurality of process data from a plurality of field devices installed in a plant;
An acquisition unit that acquires, from the gateway device via the communication unit, device information of each of the plurality of field devices, and a plurality of process data sets including at least one process data among the plurality of process data;
With
The acquisition unit is an information acquisition device that acquires each of the plurality of process data sets and the device information at different timings. A data collection unit for collecting a plurality of process data from a plurality of field devices installed in the plant;
A data providing unit that provides a device information of each of the plurality of field devices and a plurality of process data sets including at least one process data among the plurality of process data to the information acquisition device;
With
The data providing unit is a gateway device that provides each of the plurality of process data sets and the device information to the information acquisition device at different timings.

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