Patent Publication Number: US-2022236812-A1

Title: Information processing device and information processing method

Description:
This Nonprovisional application claims priority under 35 U.S.C. § 119 on Patent Application No. 2021-011237 filed in Japan on Jan. 27, 2021 and on Patent Application No. 2021-171937 filed in Japan on Oct. 20, 2021, the entire contents of which are hereby incorporated by reference. 
     TECHNICAL FIELD 
     The present invention relates to an information processing device and an information processing method. 
     BACKGROUND ART 
     For example, Patent Literature 1 discloses a communication system in which a host computer including a display device is connected with a plurality of processing apparatuses each of which includes a programmable logic controller (PLC). The host computer obtains information pertaining to a processing apparatus from the processing apparatus, and causes the display device to display the obtained information. 
     CITATION LIST 
     Patent Literature 
     [Patent Literature 1] 
     
         
         Japanese Patent Application Publication, Tokukai, No. 2017-92792 
       
    
     SUMMARY OF INVENTION 
     Technical Problem 
     In a production site, a technique is used in which PLC incorporated in equipment is operated based on data obtained from a plurality of sensors and a plurality of pieces of accessory equipment. As a form of connecting the plurality of sensors and the plurality of pieces of accessory equipment to the equipment, a form of connecting a plurality of sensors and a plurality of pieces of accessory equipment to equipment via a relay device is known. 
     However, in a case where the communication system disclosed in Patent Literature 1 is used in the form of connecting a plurality of sensors and a plurality of pieces of accessory equipment to equipment via a relay device, it is necessary to additionally provide a separate host computer. Therefore, there has been a problem of an increase in equipment cost. 
     An object of an aspect of the present invention is to prevent an increase in equipment cost. 
     Solution to Problem 
     In order to attain the object, an information processing device in accordance with an aspect of the present invention includes at least one processor, the at least one processor executing a first relaying process for obtaining sensor data transmitted from each of sensors included in a sensor group and providing the sensor data thus obtained to main equipment, a second relaying process for obtaining accessory equipment data transmitted from each of pieces of accessory equipment included in an accessory equipment group and providing the accessory equipment data thus obtained to the main equipment, and a displaying process for causing a display device to display at least any of the sensor data obtained in the first relaying process, information obtained from the sensor data, the accessory equipment data obtained in the second relaying process, and information obtained from the accessory equipment data. 
     In order to attain the object, an information processing method in accordance with an aspect of the present invention includes a first relaying process for obtaining, by at least one processor, sensor data transmitted from each of sensors included in a sensor group and providing, by the at least one processor, the sensor data thus obtained to main equipment, a second relaying process for obtaining, by the at least one processor, accessory equipment data transmitted from each of pieces of accessory equipment included in an accessory equipment group and providing, by the at least one processor, the accessory equipment data thus obtained to the main equipment, and a displaying process for causing, by the at least one processor, a display device to display at least any of the sensor data obtained in the first relaying process, information obtained from the sensor data, the accessory equipment data obtained in the second relaying process, and information obtained from the accessory equipment data. 
     Advantageous Effects of Invention 
     According to an aspect of the present invention, it is possible to prevent an increase in equipment cost. 
    
    
     
       BRIEF DESCRIPTION OF DRAWINGS 
         FIG. 1  is a front view illustrating an appearance of an information processing device in accordance with an embodiment of the present invention. 
         FIG. 2  is a block diagram illustrating a configuration of the information processing device illustrated in  FIG. 1  and peripheral devices thereof. 
         FIG. 3  is a diagram illustrating a configuration of sensor data stored in a memory of the information processing device illustrated in  FIG. 1 . 
         FIG. 4  is a diagram illustrating a configuration of a sensor address map stored in the memory of the information processing device illustrated in  FIG. 1 . 
         FIG. 5  is a diagram illustrating a configuration of equipment data stored in the memory of the information processing device illustrated in  FIG. 1 . 
         FIG. 6  is a diagram illustrating a configuration of an equipment address map of equipment data stored in the memory of the information processing device illustrated in  FIG. 1 . 
         FIG. 7  is a flowchart showing a display method in which the information processing device illustrated in  FIG. 1  causes a display device to display data. 
         FIG. 8  is a screen transition diagram illustrating a display screen displayed in the displaying process shown in  FIG. 7 . 
         FIG. 9  is a diagram illustrating an example of an overview screen which the information processing device illustrated in  FIG. 1  causes the display device to display. 
         FIG. 10  is a diagram illustrating an example of a sensor screen which the information processing device illustrated in  FIG. 1  causes the display device to display. 
         FIG. 11  is a diagram illustrating an example of an accessory equipment screen which the information processing device illustrated in  FIG. 1  causes the display device to display. 
     
    
    
     DESCRIPTION OF EMBODIMENTS 
     An information processing device in accordance with the present application is a device for relaying communication between sensors included in a sensor group and main equipment, and relaying communication between pieces of accessory equipment included in an accessory equipment group and the main equipment. The following description will discuss details of an information processing device in accordance with the present embodiment with reference to the drawings. 
     (Appearance of Information Processing Device) 
     The following description will discuss an appearance of an information processing device  1  in accordance with an embodiment of the present invention with reference to  FIG. 1 .  FIG. 1  is a front view illustrating an appearance of the information processing device  1 . 
     As illustrated in  FIG. 1 , the information processing device  1  includes a power source button  7 , a power source pilot lamp  8 , and an abnormality pilot lamp  9 . 
     The power source button  7  is a button for starting or stopping the information processing device  1 . When a user presses the power source button  7  in a state in which the information processing device  1  is stopped, the information processing device  1  starts operating. When the user presses the power source button  7  in a state in which the information processing device  1  is in operation, the information processing device  1  stops. The power source pilot lamp  8  is a pilot lamp for indicating that the information processing device  1  is in operation. In a state in which the information processing device  1  is in operation, the power source pilot lamp  8  is on. In a state in which the information processing device  1  is stopped, the power source pilot lamp  8  is off. The abnormality pilot lamp  9  is a pilot lamp for indicating that an abnormality is occurring in the information processing device  1 . In a state in which the information processing device  1  is in normal operation, the abnormality pilot lamp  9  is off. In a state in which the information processing device  1  is not in normal operation, the abnormality pilot lamp  9  is on. The abnormality pilot lamp  9  can be configured to be turned on when an abnormality occurs in the sensor or the accessory equipment that is connected to the information processing device  1 . 
     (Configuration of Information Processing System Including Information Processing Device) 
     The following description will discuss a configuration of an information processing system S including the information processing device  1  with reference to  FIG. 2 .  FIG. 2  is a block diagram illustrating the configuration of the information processing system S. 
     The information processing system S includes main equipment  2 , a sensor group  3 , an accessory equipment group  4 , and a display device  5  in addition to the information processing device  1 . 
     The main equipment  2  is a device which plays a main role in a production line. The main equipment  2  can be, for example, a molding machine for forming a mold. The main equipment  2  includes a programmable logic controller (PLC)  21 . The PLC  21  controls components of the main equipment  2  based on sensor data obtained, via the information processing device  1 , from sensors constituting the sensor group  3  and based on pieces of equipment data obtained, via the information processing device  1 , from pieces of accessory equipment constituting the accessory equipment group  4 . 
     The sensor group  3  includes a plurality of sensor slave units  3   a   1 ,  3   a   2 , . . . (an example of “sensors” in claims) and a sensor master unit  3   b . Hereinafter, when the sensor slave units  3   a   1 ,  3   a   2 , . . . are not individually identified, the sensor slave unit is referred to as “sensor slave unit  3   a”.    
     The sensor slave unit  3   a  is a device for detecting surrounding statuses of the sensor slave unit  3   a , e.g., a status of the main equipment  2 , a surrounding status of the main equipment  2 , a status of accessory equipment  4   a , a surrounding status of the accessory equipment  4   a , a status of a raw material, a status of an intermediate product, or a status of a product. The sensor slave unit  3   a  can be, for example, an open/close sensor, a temperature sensor, PATLITE (registered trademark), or the like. The sensor slave unit  3   a  transmits, to the sensor master unit  3   b , a detection value of the sensor slave unit  3   a  along with status information of the sensor slave unit  3   a  as sensor data. Here, the status information of the sensor slave unit  3   a  indicates, for example, a usage status of the sensor slave unit  3   a , presence or absence of a monitoring function, a communication status, radio field intensity, or a remaining battery capacity. The sensor slave unit  3   a  is wirelessly connected to the sensor master unit  3   b  via, for example, EnOcean (registered trademark), ZigBee (registered trademark), Bluetooth Low Energy (registered trademark), or the like. 
     Note that there is a sensor device which has a plurality of sensor functions, e.g., a temperature/humidity sensor which detects both a temperature and humidity. In this case, each of sensor functions of a sensor device is dealt with as the sensor slave unit  3   a . Therefore, a plurality of sensor slave units  3   a  can correspond to a single sensor device. 
     The sensor master unit  3   b  is a device for relaying communication between each of the sensor slave units  3   a  and the information processing device  1 . The sensor master unit  3   b  transmits, to the information processing device  1 , detection values and status information of the sensor slave units  3   a  that are connected to the sensor master unit  3   b  along with status information of the sensor master unit  3   b  as sensor data. Here, the status information of the sensor master unit  3   b  indicates, for example, a communication status and the number of times of data obtainment of the sensor master unit  3   b . The sensor master unit  3   b  is connected to the information processing device  1  via wired connection by, for example, Ethernet (registered trademark). 
     The accessory equipment group  4  is constituted by a plurality of pieces of accessory equipment  4   a   1 ,  4   a   2 , and so forth. Hereinafter, when the pieces of accessory equipment  4   a   1 ,  4   a   2 , . . . are not individually identified, the accessory equipment is referred to as “accessory equipment  4   a”.    
     The accessory equipment  4   a  is a device for assisting the main equipment  2 . The accessory equipment  4   a  can be, for example, a conveyor, a cylinder, a dust collector, or the like. The accessory equipment  4   a  includes a PLC  41 . The PLC  41  of each of pieces of accessory equipment  4   a  controls components of that accessory equipment  4   a . The PLC  41  of each of the pieces of accessory equipment  4   a  transmits, to the information processing device  1 , digital output and analog output of that accessory equipment  4   a  along with status information of that accessory equipment  4   a  as equipment data. Here, the digital output of the accessory equipment  4   a  is also called “operation signal” and indicates, for example, whether or not automatic operation is available, whether or not the equipment is in automatic operation, whether or not an abnormality is occurring, or whether or not the equipment is in emergency stop. The analog output of the accessory equipment  4   a  indicates, for example, a feeding speed of a conveyor, operation pressure of a cylinder, an airflow rate of a dust collector, power consumption, or the like. The status information of the accessory equipment  4   a  indicates, for example, a usage status of the accessory equipment  4   a , presence or absence of a monitoring function, or a communication status. The accessory equipment  4   a  is connected to the information processing device  1  via wired connection by, for example, CC-Link (registered trademark). 
     The information processing device  1  is a device for relaying communication between the main equipment  2  and the sensor group  3 , and communication between the main equipment  2  and the accessory equipment group  4 . The information processing device  1  includes a processor  11 , a memory  12 , an input/output IF  13 , a communication IF  14 , and a PLC  15 , as illustrated in  FIG. 2 . The processor  11 , the memory  12 , the input/output IF  13 , the communication IF  14 , and the PLC  15  are connected to each other via buses. The information processing device  1  can be realized, for example, by adding the PLC  15  to a small single board computer such as Raspberry Pi (registered trademark). 
     In the memory  12 , a sensor data set D 1 , an equipment data set D 2 , a sensor address map M 1 , and an equipment address map M 2  are stored together with an information processing program P. The processor  11  refers to the sensor data set D 1 , the equipment data set D 2 , the sensor address map M 1 , and the equipment address map M 2 , and executes an information processing method (described later) in accordance with the information processing program P. Examples of devices that can be used as the processor  11  include a central processing unit (CPU). Examples of devices that can be used as the memory  12  include a flash memory. 
     The input/output IF  13  is an interface for connecting the display device  5 . As the input/output IF  13 , for example, high-definition multimedia interface (HDMI) (registered trademark) is used. The communication IF  14  is an interface for communicating with the sensor master unit  3   b . For example, an Ethernet interface is used as the communication IF  14 . The PLC  15  is a controller for communicating with (the PLC  21  of) the main equipment  2  and (the PLC  41  of) the accessory equipment  4   a . The PLC can access the equipment data set D 2  and the equipment address map M 2  via the busses. The PLC  15  is connected to (the PLC  21  of) the main equipment  2  and to (the PLC  41  of) the accessory equipment  4   a  by CC-Link. 
     (Configurations of Sensor Data Set and Sensor Address Map) 
     A configuration of the sensor data set D 1  stored in the memory  12  of the information processing device  1  will be described with reference to  FIG. 3 .  FIG. 3  is a diagram illustrating the configuration of the sensor data set D 1 . 
     As illustrated in  FIG. 3 , the sensor data set D 1  is constituted by configuration information  91 , status information  92 , output information  93 , and monitor information  94 . Pieces of information constituting the configuration information  91 , the status information  92 , the output information  93 , and the monitor information  94  are managed with consecutive word numbers. In  FIG. 3 , a leading portion of word number of the configuration information  91  is “Head”, a leading portion of word number of the status information  92  is “Comm.”, a leading portion of word number of the output information  93  is “Data”, and a leading portion of word number of the monitor information  94  is “Mon.”, and each of the leading portions indicates content of information corresponding to that word number. 
     The configuration information  91  is information indicating a configuration of the sensor group  3 . The configuration information  91  includes, for example, the number of sensor master units  3   b , a type code and an IP address of each sensor master unit  3   b , the number of sensor slave units  3   a  connected to each sensor master unit  3   b , the total number of sensor slave units  3   a , and a type code of each sensor slave unit  3   a . For example, the configuration information  91  may be set by a manufacturer prior to shipment of the information processing device  1 , or may be set by a user after shipment of the information processing device  1 . An offset value of a leading word number of each of the status information  92 , the output information  93 , and the monitor information  94  (i.e., a difference from a leading word number of the configuration information  91 ), system information of the information processing device  1 , and the like may be included in the configuration information  91 . 
     The status information  92  is a set of status information of each of the sensor slave units  3   a  and status information of the sensor master unit  3   b . The status information of each of the sensor slave units  3   a  is, as described above, obtained from that sensor slave unit  3   a  via the sensor master unit  3   b  as sensor data. The status information of the sensor master unit  3   b  is obtained from the sensor master unit  3   b  as described above. The status information  92  may include a keep-alive signal of the information processing system S, sensor slave unit integrated information in which pieces of status information of all the sensor slave units  3   a  are integrated, and/or the like. The sensor slave unit integrated information includes, for example, information indicating whether or not communication statuses of all the sensor slave units  3   a  are normal, and information indicating whether or not remaining battery capacities of all the sensor slave units  3   a  are normal. 
     The output information  93  is a set of detection values of the sensor slave units  3   a . The detection value of each of the sensor slave units  3   a  is obtained as sensor data from that sensor slave unit  3   a , as described above. 
     The monitor information  94  is a set of a determination condition and a determination result pertaining to each of the sensor slave units  3   a . The determination condition pertaining to each of the sensor slave units  3   a  is represented, for example, by a threshold value. In this case, the determination result pertaining to each of the sensor slave units  3   a  is given as a result of comparing the detection value of that sensor slave unit  3   a  with the threshold value. The determination condition pertaining to each of the sensor slave units  3   a  may be set by a manufacturer prior to shipment of the information processing device  1 , or may be set by a user after shipment of the information processing device  1 . The determination result pertaining to each of the sensor slave units  3   a  is derived from the information processing device  1  each time the detection value of that sensor slave unit  3   a  is updated. 
     A configuration of the sensor address map M 1  as address information stored in the memory  12  of the information processing device  1  will be described with reference to  FIG. 4 .  FIG. 4  is a diagram illustrating the configuration of the sensor address map M 1 . 
     The sensor address map M 1  is a table in which word numbers assigned to respective pieces of information included in the sensor data set D 1  are associated with addresses on a memory of the PLC  21  provided in the main equipment  2 . 
     The processor  11  of the information processing device  1  reads out pieces of information included in the sensor data set D 1  as the configuration information  91 , the status information  92 , the output information  93 , and the monitor information  94  from the memory  12  of the information processing device  1 , and writes the information to the memory of the PLC  21  provided in the main equipment  2 . At this time, the processor  11  of the information processing device  1  determines, in accordance with the sensor address map M 1 , a region on the memory of the PLC  21  to which each piece of information is to be written. For example, in the sensor address map M 1 , a word number Data+001 is associated with addresses EEE through E′E′E′. Therefore, the processor  11  of the information processing device  1  writes detection values of a first sensor slave unit, to which the word number Data+001 is assigned in the sensor data set D 1 , to regions to which the addresses EEE through E′E′E′ are assigned in the memory of the PLC  21 . 
     The processor  11  of the information processing device  1  may write sensor data obtained from the sensors constituting the sensor group  3  to the memory of the PLC  21  provided in the main equipment  2  in accordance with the information processing program P. In this case, address information equivalent to the foregoing sensor address map M 1  is included inside the information processing program P. 
     (Configurations of Equipment Data Set and Equipment Address Map) 
     A configuration of the equipment data set D 2  stored in the memory  12  of the information processing device  1  will be described with reference to  FIG. 5 .  FIG. 5  is a diagram illustrating the configuration of the equipment data set D 2 . 
     As illustrated in  FIG. 5 , the equipment data set D 2  is constituted by configuration information  95 , status information  96 , output information  97 , input information  98 , and monitor information  99 . Pieces of information constituting the configuration information  95 , the status information  96 , the output information  97 , the input information  98 , and the monitor information  99  are managed with consecutive word numbers. In  FIG. 5 , a leading portion of word number of the configuration information  95  is “Head”, a leading portion of word number of the status information  96  is “Comm.”, a leading portion of word number of the output information  97  is “S_data”, a leading portion of word number of the input information  98  is “O_data”, and a leading portion of word number of the monitor information  99  is “Mon.”, and each of the leading portions indicates content of information corresponding to that word number. 
     The configuration information  95  is information indicating a configuration of the accessory equipment group  4 . The configuration information  95  includes, for example, the number of pieces of the accessory equipment  4   a  and a type code of each piece of the accessory equipment  4   a . An offset value of a leading word number of each of the status information  96 , the output information  97 , the input information  98 , and the monitor information  99  (i.e., a difference from a leading word number of the configuration information  95 ), system information of the information processing device  1 , and the like may be included in the configuration information  95 . 
     The status information  96  is a set of pieces of status information of the pieces of accessory equipment  4   a . The status information of each piece of the accessory equipment  4   a  is obtained as the equipment data from that piece of accessory equipment  4   a , as described above. The status information  96  may include a keep-alive signal of the information processing system S, a low battery signal of the information processing device  1 , and/or the like. 
     The output information  97  is a set of digital output and analogue output of each piece of the accessory equipment  4   a . The digital output and analogue output of each piece of the accessory equipment  4   a  are obtained as the equipment data from that piece of accessory equipment  4   a , as described above. The output information  97  may include accessory equipment integrated information in which digital outputs (operation signals) of all pieces of the accessory equipment  4   a  are integrated. The accessory equipment integrated information includes, for example, information indicating whether or not all pieces of accessory equipment  4   a  are normal, and information indicating whether or not all pieces of the accessory equipment  4   a  can be automatically operated. 
     The input information  98  is a set of digital input and analog input of each piece of the accessory equipment  4   a . The digital input of each piece of the accessory equipment  4   a  is also called “command signal”, and represents a command to that piece of accessory equipment  4   a . The analog input of each piece of the accessory equipment  4   a  is also called “command value”, and represents a command value to that piece of accessory equipment  4   a . The digital input and analog input of each piece of the accessory equipment  4   a  are obtained from the PLC  21  of the main equipment  2 . The input information  98  may include an accessory equipment integrated command in which command signals for all pieces of the accessory equipment  4   a  are integrated. The accessory equipment integrated command includes, for example, an auto-start command for all pieces of accessory equipment that gives an instruction on auto-start to all pieces of the accessory equipment  4   a , and an auto-stop command for all pieces of accessory equipment that gives an instruction on auto-stop to all pieces of the accessory equipment  4   a.    
     The monitor information  99  is a set of a determination condition and a determination result pertaining to each piece of the accessory equipment  4   a . The determination condition pertaining to each piece of the accessory equipment  4   a  is represented, for example, by a threshold value. In this case, the determination result pertaining to each piece of the accessory equipment  4   a  is given as a result of comparing the digital output of that piece of accessory equipment  4   a  with the threshold value. The determination condition pertaining to each piece of the accessory equipment  4   a  may be set by a manufacturer prior to shipment of the information processing device  1 , or may be set by a user after shipment of the information processing device  1 . The determination result pertaining to each piece of the accessory equipment  4   a  is derived by the information processing device  1  each time the digital output of that piece of accessory equipment  4   a  is updated. A determination record pertaining to each piece of the accessory equipment  4   a  may be included in the monitor information  99 . The determination record pertaining to each piece of the accessory equipment  4   a  includes, for example, the number of times the determination result pertaining to that piece of accessory equipment  4   a  has become true. 
     A configuration of the equipment address map M 2  as address information stored in the memory  12  of the information processing device  1  will be described with reference to  FIG. 6 .  FIG. 6  is a diagram illustrating the configuration of the equipment address map M 2 . 
     The equipment address map M 2  is a table in which word numbers assigned to respective pieces of information included in the equipment data set D 2  are associated with addresses on a memory of the PLC  21  provided in the main equipment  2 . 
     The processor  11  of the information processing device  1  reads out pieces of information included in the equipment data set D 2  as the configuration information  95 , the status information  96 , the output information  97 , and the monitor information  99  from the memory  12  of the information processing device  1 , and writes the information to the memory of the PLC  21  provided in the main equipment  2 . At this time, the processor  11  of the information processing device  1  determines, in accordance with the equipment address map M 2 , a region on the memory of the PLC  21  to which each piece of information is to be written. For example, in the equipment address map M 2 , a word number S_S_Data+001 is associated with addresses UUU through U′U′U′. Therefore, the processor  11  of the information processing device  1  writes digital output of first accessory equipment, to which the word number S_Data+001 is assigned in the equipment data set D 2 , to regions to which the addresses UUU through U′U′U′ are assigned in the memory of the PLC  21 . 
     In addition, the processor  11  of the information processing device  1  reads out pieces of information included in the equipment data set D 2  as the input information  98  from the memory of the PLC  21  provided in the main equipment  2 , and writes the read information to the memory  12  of the information processing device  1 . At this time, the processor  11  of the information processing device  1  determines, in accordance with the equipment address map M 2 , a region on the memory of the PLC  21  from which each piece of information is to be read out. For example, in the equipment address map M 2 , a word number O_Data+001 is associated with addresses WWW through W′W′W. Therefore, the processor  11  of the information processing device  1  reads out digital input of first accessory equipment, to which the word number O_Data+001 is assigned in the sensor data set D 1 , from regions to which the addresses WWW through W′W′W′ are assigned in the memory of the PLC  21 . 
     The processor  11  of the information processing device  1  may write pieces of equipment data obtained from the pieces of accessory equipment constituting the accessory equipment group  4  to the memory of the PLC  21  provided in the main equipment  2  in accordance with the information processing program P. In this case, address information corresponding to the foregoing equipment address map M 2  is included inside the information processing program P. 
     (Display Method) 
     A display method H 1  for displaying data in the information processing device  1  will be described with reference to  FIG. 7 .  FIG. 7  is a flowchart showing a display method H 1  in which the information processing device  1  causes the display device  5  to display data. 
     The display method H 1  for displaying data in the information processing device  1  includes a first relaying process S 1 , a second relaying process S 2 , and a displaying process S 4  as shown in  FIG. 7 . 
     The first relaying process S 1  is a process in which the processor  11  of the information processing device  1  obtains sensor data transmitted from each of the sensor slave units  3   a  constituting the sensor group  3  and the processor  11  provides the sensor data thus obtained to the main equipment  2 . In the first relaying process S 1 , the sensor slave unit  3   a  transmits sensor data to the sensor master unit  3   b  periodically or each time a detection value changes. Further, the sensor master unit  3   b , periodically or each time the sensor master unit  3   b  receives sensor data from the sensor slave unit  3   a , transmits the sensor data received from the sensor slave unit  3   a  to the information processing device  1 . The processor  11  of the information processing device  1  receives the sensor data transmitted from the sensor slave unit  3   a.    
     In the first relaying process S 1 , the processor  11  of the information processing device  1  extracts status information and a detection value of the sensor slave unit  3   a  from the obtained sensor data. In addition, the processor  11  converts the extracted status information and detection value into a format that is interpretable to the PLC  21  of the main equipment  2 , and then writes the converted information and value into the memory  12  as the status information  92  and the output information  93  of the sensor data set D 1 . The processor  11  (1) compares the detection value of the sensor slave unit  3   a  written to the memory  12  as the output information  93  of the sensor data set D 1  with the threshold value written to the memory  12  as the monitor information  94  of the sensor data set D 1 , and (2) writes a comparison result to the memory  12  as the monitor information  94  of the sensor data set D 1 . The processor  11  reads out information constituting the status information  92 , the output information  93 , and the monitor information  94  of the sensor data set D 1 , and writes the read information to the memory of the PLC  21  provided in the main equipment  2 . At this time, the processor  11  of the information processing device  1  determines, with reference to the sensor address map M 1 , which information is to be written to which region of the memory of the PLC  21 . 
     The second relaying process S 2  is a process for obtaining equipment data transmitted from each of the pieces of accessory equipment  4   a  included in the accessory equipment group  4  and providing the equipment data thus obtained to the main equipment  2 . In the second relaying process S 2 , first accessory equipment  4   a   1  transmits equipment data to the information processing device  1  periodically or each time the status changes. The processor  11  of the information processing device  1  extracts status information, digital output and analogue output of the first accessory equipment  4   a   1  from the obtained equipment data. In addition, the processor  11  converts the extracted status information, digital output and analog output into a format that is interpretable to the PLC  21  of the main equipment  2 , and then writes the converted information and output to the memory  12  as the status information  96  of the equipment data set D 2 . 
     In the second relaying process S 2 , the processor  11  of the information processing device  1  (1) compares the digital output and/or analog output of the first accessory equipment  4   a   1  written to the memory  12  as the output information  97  of the equipment data set D 2  with the threshold value written to the memory  12  as the monitor information  99  of the equipment data set D 2 , and (2) writes a comparison result to the memory  12  as the monitor information  99  of the equipment data set D 2 . The processor  11  reads out pieces of information constituting the status information  96 , the output information  97 , and the monitor information  99  of the equipment data set D 2 , and writes the read information to the memory of the PLC  21  provided in the main equipment  2 . At this time, the processor  11  of the information processing device  1  determines, with reference to the equipment address map M 2 , which information is to be written to which region of the memory of the PLC  21 . 
     The determining process S 3  is a process for determining whether or not the sensor data and equipment data obtained in the first relaying process S 1  and the second relaying process S 2  satisfy a particular condition. In the determining process S 3 , the processor  11  of the information processing device  1  (1) compares the detection value of the sensor slave unit  3   a  written to the memory  12  as the output information  93  of the sensor data set D 1  with the threshold value written to the memory  12  as the monitor information  94  of the sensor data set D 1 , and (2) writes a comparison result to the memory  12  as the monitor information  94  of the sensor data set D 1 . The processor  11  (1) compares the digital output and/or analog output of the first accessory equipment  4   a   1  written to the memory  12  as the output information  97  of the equipment data set D 2  with the threshold value written to the memory  12  as the monitor information  99  of the equipment data set D 2 , and (2) writes a comparison result to the memory  12  as the monitor information  99  of the equipment data set D 2 . 
     The displaying process S 4  is a process for causing the display device  5  to display at least any of the sensor data obtained in the first relaying process S 1 , information obtained from the sensor data, the accessory equipment data obtained in the second relaying process S 2 , and information obtained from the accessory equipment data. In the displaying process S 4 , the processor  11  of the information processing device  1  read out particular information from among the configuration information  91 , the status information  92 , the output information  93 , and the monitor information  94  of the sensor data set D 1  which is stored in the memory  12 . The processor  11  generates, from the particular information thus read out, a display screen for displaying the sensor data and/or the information obtained from the sensor data. The processor reads out particular information from among the configuration information  95 , the status information  96 , the output information  97 , and the monitor information  99  of the equipment data set D 2  which is stored in the memory  12 . The processor  11  generates, from the particular information thus read out, a display screen for displaying the equipment data and/or the information obtained from the equipment data. 
     In the displaying process S 4 , the processor  11  of the information processing device  1  outputs the generated display screen to the display device  5 . Specific examples of the display screen will be described later with reference to other drawings. The processor  11  causes the display device  5  to display, as an overview screen  110 , the sensor data obtained in the first relaying process S 1  or information obtained from the sensor data, and the accessory equipment data obtained in the second relaying process S 2  or information obtained from the accessory equipment data, simultaneously in a list form (see  FIG. 9 ). The processor  11  causes, for a first sensor slave unit  3   a   1  selected based on a user operation from among the sensor slave units  3   a  included in the sensor group  3  displayed on the display screen, the display device  5  to display a sensor screen  120   a   1  ( 120 ) for showing information indicating a status of the first sensor slave unit  3   a   1  and sensor data transmitted from the first sensor slave unit  3   a   1  (see  FIG. 10 ). In the displaying process S 4 , the processor  11  causes, for first accessory equipment  4   a   1  selected based on a user operation from among the pieces of accessory equipment  4   a  included in the accessory equipment group  4  displayed on the display screen, the display device  5  to display an accessory equipment screen  130   a   1  ( 130 ) for showing information indicating a status of the first accessory equipment  4   a   1  and information pertaining to inspection timing obtained from the number of times of operation of the first accessory equipment  4   a   1  (see  FIG. 11 ). 
     As illustrated in  FIG. 7 , the processor  11  of the information processing device  1  may further execute a changing process S 5  for changing a condition used for the determining process S 3  based on a user operation. In the changing process S 5 , the processor  11  of the information processing device  1  changes the threshold value stored in the memory  12  as the monitor information  94  of the sensor data set D 1  to a value specified by the user. The processor  11  changes the threshold value stored in the memory  12  as the monitor information  99  of the equipment data set D 2  to a value specified by the user. 
     (Screen Transition) 
     The following description will discuss a screen transition H 2  of a display screen displayed on the display device  5  in the displaying process S 4 , with reference to  FIGS. 8 through 12 .  FIG. 8  is a screen transition diagram illustrating a display screen displayed in the displaying process S 4 .  FIG. 9  is a diagram illustrating an example of an overview screen  110  which the information processing device  1  causes the display device  5  to display.  FIG. 10  is a diagram illustrating an example of a sensor screen  120  which the information processing device  1  causes the display device  5  to display.  FIG. 11  is a diagram illustrating an example of an accessory equipment screen  130  which the information processing device  1  causes the display device  5  to display. 
     As illustrated in  FIG. 8 , the processor  11  of the information processing device  1  displays a base display screen  100  in the displaying process S 4  (see  FIG. 9 ). When an item displayed in a side bar  102  in the base display screen  100  is selected by the user, information pertaining to the selected item is displayed in a data display area  103  of the base display screen  100 . For example, when the first sensor slave unit  3   a   1  is selected from among items in the side bar  102 , a sensor screen  120   a   1  is displayed in which information pertaining to the first sensor slave unit  3   a   1  is displayed in the data display area  103  (see  FIG. 10 ). Details of the sensor screen  120  will be described later. When the first accessory equipment  4   a   1  is selected from among the items in the side bar  102 , an accessory equipment screen  130   a   1  is displayed in the data display area  103  (see  FIG. 11 ). Details of the accessory equipment screen  130  will be described later. 
     When an overview  105  is selected from among the items in the side bar  102 , an overview screen  110  is displayed in the data display area  103  (see  FIG. 9 ). Details of the overview screen  110  will be described later. For items of the sensor slave unit  3   a  displayed in a sensor item  113  displayed in the overview screen  110 , respective detail buttons  114  are displayed. When a detail button  114  displayed for the item of the first sensor slave unit  3   a   1  is selected, the sensor screen  120   a   1  is displayed in the data display area  103  for showing information pertaining to the first sensor slave unit  3   a   1 . When a return button  124  displayed in the sensor screen  120   a   1  is selected, the overview screen  110  is displayed in the data display area  103 . 
     For items of each piece of accessory equipment  4   a  displayed in an accessory equipment item  111  displayed in the overview screen  110 , respective detail buttons  112  are displayed. When a detail button  112  displayed for the item of the first accessory equipment  4   a   1  is selected, an accessory equipment screen  130   a   1  is displayed in the data display area  103 . When a return button  133  displayed in the accessory equipment screen  130   a   1  is selected, the overview screen  110  is displayed in the data display area  103 . 
     (Examples of Display Screen) 
     Examples of display screens which the information processing device  1  causes the display device  5  to display will be described with reference to  FIGS. 9 through 11 . 
     The base display screen  100  displayed on the display device  5  will be described with reference to  FIG. 9 . As illustrated in  FIG. 9 , the processor  11  of the information processing device  1  causes the display device  5  to display the base display screen  100 . In the base display screen  100 , a title bar  101 , the side bar  102 , and the data display area  103  are displayed. 
     In the side bar  102 , the sensor slave units  3   a  and pieces of accessory equipment  4   a  which are connected to the information processing device  1  and whose data can be displayed are displayed as items  104 . In the side bar  102 , the overview  105  is also displayed as an item for displaying, in the data display area  103 , pieces of data related to all the sensor slave units  3   a  and pieces of accessory equipment  4   a  displayed in the side bar  102 . In the title bar  101 , a name of an item selected based on a user operation in the side bar  102  is displayed. In the data display area  103 , data of the item selected by the user in the side bar  102  is displayed. 
     The overview screen  110  displayed on the display device  5  will be described with reference to  FIG. 9 . When the item of the overview  105  is selected in the side bar  102 , the overview screen  110  is displayed in the data display area  103  as illustrated in  FIG. 9 . In the overview screen  110 , the accessory equipment item  111  for displaying information pertaining to all the pieces of accessory equipment  4   a  displayed in the side bar  102 , and the sensor item  113  for displaying information pertaining to all the sensor slave units  3   a  displayed in the side bar  102  are displayed. 
     As the information pertaining to the sensor slave unit  3   a  displayed in the sensor item  113 , status information (a remaining battery capacity and a communication status in the example illustrated in  FIG. 9 ) of the sensor slave unit  3   a  is displayed. The remaining battery capacity is displayed as a numerical value in the sensor item  113 . The communication status displayed in the sensor item  113  is indicated as, for example, (1) sensor master unit abnormality, (2) sensor slave unit abnormality, (3) radio wave caution, or (4) normal. The displayed communication status can indicate a status of information by changing a color of character. For example, a normal status may be indicated in a cold color, and an abnormality status may be indicated in a warm color. For items of the sensor slave unit  3   a  displayed in the sensor item  113 , the respective detail buttons  114  are displayed. When a detail button  114  displayed for an arbitrary sensor slave unit  3   a  is selected by the user, the sensor screen  120  is displayed in the data display area  103  for indicating information pertaining to the selected sensor slave unit  3   a  (see  FIG. 10 ). 
     As the information pertaining to the accessory equipment  4   a  displayed in the accessory equipment item  111 , an operation signal of the accessory equipment  4   a  (indicators showing whether or not the equipment is in operation, and whether or not the equipment is in abnormal operation in the example illustrated in  FIG. 9 ) and monitor information of the accessory equipment  4   a  (indicator showing replacement information in the example illustrated in  FIG. 9 ) are displayed. When the selected first accessory equipment  4   a   1  is in operation, an indicator of “in operation” is displayed for the item of the first accessory equipment  4   a   1  and, when the first accessory equipment  4   a   1  is stopped, an indicator of “stopped” is displayed. When the selected first accessory equipment  4   a   1  is in abnormal operation, an indicator of “in abnormal operation” is displayed. When the selected first accessory equipment  4   a   1  is not in abnormal operation, the indicator of “in abnormal operation” is not displayed. For the items of the accessory equipment  4   a  displayed in the accessory equipment item  111 , the respective detail buttons  112  are displayed. When a detail button  112  displayed for arbitrary accessory equipment  4   a  is selected by the user, the accessory equipment screen  130  is displayed in the data display area  103  for indicating information pertaining to the selected accessory equipment  4   a  (see  FIG. 11 ). 
     The sensor screen  120  displayed on the display device  5  will be described with reference to  FIG. 10 . When an item of each of the sensor slave units  3   a  displayed in the side bar  102  or a detail button  114  displayed in the overview screen  110  is selected by a user operation, the sensor screen  120  is displayed in the data display area  103  as illustrated in  FIG. 10 . As an example, a sensor screen  120   a   1  displayed when the first sensor slave unit  3   a   1  is selected will be described. In the sensor screen  120   a   1 , master unit information  121  indicating information pertaining to the sensor master unit  3   b  connected with the selected first sensor slave unit  3   a   1 , sensor slave unit information  122  indicating information pertaining to the selected first sensor slave unit  3   a   1 , and reception data  123  indicating data detected by the selected first sensor slave unit  3   a   1  are displayed. 
     In the master unit information  121 , a name of a sensor master unit  3   b , a communication status between the sensor master unit  3   b  and the information processing device  1 , and a communication status between the sensor master unit  3   b  and the sensor slave unit  3   a  as information pertaining to the sensor master unit  3   b  are displayed. The communication status between the sensor master unit  3   b  and the information processing device  1  is indicated as, for example, (1) sensor master unit abnormality, (2) sensor slave unit abnormality, (3) radio wave caution, or (4) normal. The displayed communication status can indicate a status of information by changing a color of character. The communication status between the sensor master unit  3   b  and the sensor slave unit  3   a  is displayed as a graph so that communication statuses in the past can be seen. In a lower part of the master unit information  121 , the return button  124  is displayed. When the return button  124  is selected, the overview screen  110  is displayed which was displayed before the sensor screen  120  is displayed. 
     In the sensor slave unit information  122 , a name of the first sensor slave unit  3   a   1 , ID of the first sensor slave unit  3   a   1 , and a remaining battery capacity of the first sensor slave unit  3   a   1  are displayed as information pertaining to the sensor slave unit  3   a . The remaining battery capacity is displayed as a numerical value. The remaining battery capacity can be displayed in colors that change in accordance with a remaining capacity of a battery. For example, a sufficient remaining battery capacity may be indicated in a cold color, and a low remaining battery capacity may be indicated in a warm color. 
     In the reception data  123 , a detection value detected by the first sensor slave unit  3   a   1  is displayed. In the reception data  123 , a displaying manner varies in accordance with data detected by the selected sensor slave unit  3   a . In the example illustrated in  FIG. 10 , a detection value related to a temperature is displayed as a semicircular gauge and a numerical value, and a detection value related to vibration is displayed as a semicircular gauge and a numerical value. As another example, a lamp displayed on the display screen may be turned on when the open/close sensor is ON, and the lamp may be turned off when the open/close sensor is OFF. 
     The accessory equipment screen  130  displayed on the display device  5  will be described with reference to  FIG. 11 . When an item of accessory equipment  4   a  displayed in the side bar  102  or a detail button  112  displayed in the overview screen  110  is selected by a user operation, the accessory equipment screen  130  is displayed in the data display area  103  as illustrated in  FIG. 11 . As an example, the following description will discuss a case in which the first accessory equipment  4   a   1  is selected. In the accessory equipment screen  130 , accessory equipment information  131  indicating a status of the first accessory equipment  4   a   1 , and replacement information  132  indicating information pertaining to replacement timing obtained from the number of times of operation of the first accessory equipment  4   a   1  are displayed. 
     In the accessory equipment information  131 , an image of the first accessory equipment  4   a   1 , an operation status of the first accessory equipment  4   a   1 , and information indicating an abnormal operation status of the first accessory equipment  4   a   1  are displayed. In the operation status of the first accessory equipment  4   a   1 , an indicator showing whether or not the equipment is in operation is displayed. When the first accessory equipment  4   a   1  is in operation, an indicator of “in operation” is displayed and, when the first accessory equipment  4   a   1  is stopped, an indicator of “stopped” is displayed. In the abnormal operation status of the first accessory equipment  4   a   1 , an indicator showing whether or not the equipment is in abnormal operation is displayed. When the first accessory equipment  4   a   1  is in abnormal operation, an indicator showing “abnormal operation” is displayed and, when the first accessory equipment  4   a   1  is in normal operation, the indicator is not displayed. In a lower part of the accessory equipment information  131 , a return button  133  is displayed. When the return button  133  is selected, the overview screen  110  is displayed which was displayed before the accessory equipment screen  130  is displayed. 
     In the replacement information  132 , information indicating whether or not inspection is necessary, a predetermined number of times of operation of the first accessory equipment  4   a   1  at which it is determined that inspection is necessary, and the current number of times of operation of the first accessory equipment  4   a   1  are displayed. When the current number of times of operation of the first accessory equipment  4   a   1  exceeds the predetermined set number of times, it is displayed that inspection is necessary as the information indicating whether or not inspection is necessary. In a lower part of the replacement information  132 , a set number changing button  134  is displayed. With the set number changing button  134 , the user can change the predetermined set number of times for the first accessory equipment  4   a   1 . 
     (Additional Remarks) 
     The present invention is not limited to the embodiments, but can be altered by a skilled person in the art within the scope of the claims. The present invention also encompasses, in its technical scope, any embodiment derived by combining technical means disclosed in differing embodiments. 
     REFERENCE SIGNS LIST 
     
         
           1 : Information processing device 
           2 : Main equipment 
           3 : Sensor group 
           3   a : Sensor slave unit 
           3   b : Sensor master unit 
           4 : Accessory equipment group 
           5 : Display device