Abstract:
There is provided a device information setting apparatus. The apparatus includes: a storage format storing unit configured to store a first storage format of first device information in a first field device and a second storage format of second device information in a second field device; an acquiring unit configured to acquire the first device information based on the first storage format; a conversion unit configured to convert the first device information into the second device information, based on the second storage format; and a writing unit configured to write the second device information in the second field device.

Description:
This application claims priority from Japanese Patent Application No. 2009-238522, filed on Oct. 15, 2009, the entire contents of which are herein incorporated by reference. 
     BACKGROUND 
     1. Technical Field 
     The present disclosure relates to a device information setting apparatus and a device information setting method for setting device information to a field device. 
     2. Related Art 
     When the user performs an operation of setting, adjusting, and maintaining a field device with a field bus function, device information is acquired from the field device and is then edited. The device information includes management information of each field device or device parameters peculiar to each device. When the device information is acquired and edited, it is necessary to use a software tool or a program that is uniquely developed by a device vendor. (see e.g., Takeuchi Tetsuo, “FDT/DTM Framework for New Field Device Tools”, Yokogawa Technical Report, Yokogawa Electric Corporation, Vol. 51 No. 2 (2007)) 
     The software tool or the program is prepared for each device. When the same type of device has different device revisions, the devices have different numbers of device parameters or different contents. Therefore, in many cases, software or a program is prepared for each device. When the same type of device having the same function has different device revisions, a plurality of software components or a plurality of programs is needed. 
     However, when the device is replaced, in some cases, it is difficult to prepare the same types of devices with the same revision. In this case, it is difficult to automatically set device information to a new device. For example, when the life span of the field device is long and the field device needs to be replaced due to, for example, a failure, it is difficult to prepare a substitutive device with, the same revision. In this case, it is necessary to manually set device information when the device is replaced, resulting in an increase in the workload of the user. In addition, when the field device is replaced with another field device manufactured by a different manufacturer, a complicated operation is needed to set device information, resulting in an increase in a setting cost. 
     SUMMARY OF THE INVENTION 
     Exemplary embodiments of the present invention address the above disadvantages and other disadvantages not described above. However, the present invention is not required to overcome the disadvantages described above, and thus, an exemplary embodiment of the present invention may not overcome any disadvantages 
     It is an illustrative aspect of the invention to provide a device information setting apparatus capable of reducing a workload for setting device information when a device is replaced. 
     According to one or more illustrative aspects of the invention, there is provided a device information setting apparatus. The apparatus includes: a storage format storing unit configured to store a first storage format of first device information in a first field device and a second storage format of second device information in a second field device; an acquiring unit configured to acquire the first device information based on the first storage format; a conversion unit configured to convert the first device information into the second device information, based on the second storage format; and a writing unit configured to write the second device information in the second field device. 
     According to one or more illustrative aspects of the invention, there is provided a device information setting method. The method includes: (a) storing a first storage format of first device information in a first field device; (b) storing a second storage format of second device information in a second field device; (c) acquiring the first device information, based on the first storage format; (d) converting the first device information into the second device information, based on the second storage format; and (e) writing the second device information in the second field device. 
     Other aspects and advantages of the present invention will be apparent from the following description, the drawings and the claims. 
    
    
     
       BRIEF DESCRIPTION OF THE DRAWINGS 
         FIG. 1  is a block diagram illustrating a device information setting apparatus according to an embodiment of the invention; 
         FIG. 2  is a flowchart illustrating the operation of the device information setting apparatus; and 
         FIG. 3  is a flowchart illustrating a device information data generating process. 
     
    
    
     DETAILED DESCRIPTION OF EXEMPLARY EMBODIMENTS 
     Hereinafter, exemplary embodiments of the present invention will be described with reference to the accompanying drawings. 
       FIG. 1  is a block diagram illustrating the device information setting apparatus according to this embodiment. 
     Each of a first field device  21  and a second field device  22  shown in  FIG. 1  has a field bus communication function, and the first field device  21  and the second field device  22  have the same function. It is assumed when the first field device  21  is replaced with the second field device  22 . 
     As shown in  FIG. 1 , the device information setting apparatus  1  includes a storage format storing unit  11  that stores the storage format of the device information in the first field device  21  and the storage format of the device information in the second field device  22 , an acquiring unit  12  that acquires the device information stored in the first field device  21  based on the storage format of the first field device  21  stored in the storage format storing unit  11 , a conversion unit  13  that converts the device information acquired by the acquiring unit  12  into the device information with the storage format in the second field device  22  based on the storage format of the second field device  22  stored in the storage format storing unit  11 , a writing unit  14  that writes the device information obtained by the conversion unit  13  to the second field device  22 , and a receiving unit  15  that receives an instruction to associate parameters included in the device information of the first field device  21  and the second field device  22 . 
     The device information setting apparatus  1  is configured as a portion of the function of a computer. The computer includes a program that allows the computer to function as the storage format storing unit  11 , the acquiring unit  12 , the conversion unit  13 , the writing unit  14 , and the receiving unit  15 . 
       FIGS. 2 and 3  are flowcharts illustrating the operation of the device information setting apparatus  1 . 
     In Step S 1  of  FIG. 2 , the acquiring unit  12  acquires and stores device information data stored in the first field device  21 . 
     Then, in Step S 2 , the acquiring unit  12  extracts device parameters and an operation log from the device information data with reference to the storage format of the first field device  21  stored in the storage format storing unit  11  and stores them. The storage format of the first field device  21  includes information indicating the storage areas of the device parameters and the operation log in the device information data stored in the field device  21 . The operation log is history data for the writing, erasion, and editing of the device information data. 
     Then, in Step S 3 , the acquiring unit  12  acquires and stores the device information data stored in the second field device  22 . 
     Then, in Step S 4 , the conversion unit  13  executes a device information data generating process in the following Steps S 41  to S 46  ( FIG. 3 ). In this process, device information data to be written to the second field device  22  is generated. Namely, the device information stored in the first filed device  21  is converted into the device information to be written in the second field device  22 . 
     In Step S 41 , one of the device parameters of the first field device  21  stored in Step S 2  is selected. 
     Then, in Step S 42 , it is determined whether a parameter with the same label name as that of the selected parameter of the first field device  21  is included in the parameter information of the second field device  22 , with reference to the storage format of the second field device  22  stored in the storage format storing unit  11 . The storage format of the second field device  22  includes information indicating the storage areas of the device parameters and the operation log in the device information data stored in the field device  22 . The correspondence between the label name and the parameter may be defined in each of the device information data of the first field device  21  and the device information data of the second field device  22 , or it may be defined in each of the storage format of the first field device  21  and the storage format of the second field device  22  stored in the storage format storing unit  11 . 
     If the determination result in Step S 42  is “Yes”, the process proceeds to Step S 43 . If the determination result in Step S 42  is “No”, the process proceeds to Step S 44 . 
     In Step S 43 , for the selected parameter of the first field device  21  (parameter with the same label name), the value of the parameter of the second field device  22  stored in Step S 3  is replaced with the value of the parameter of the first field device  21 , and the process proceeds to Step S 48 . 
     In Step S 44 , it is determined whether there is a parameter of the second field device  22  associated with the selected parameter of the first field device  21  with reference to the association of the parameter stored in the receiving unit  15 . 
     If the determination result in Step S 44  is “Yes”, the process proceeds to Step S 45 . If the determination result in Step S 44  is “No”, the process proceeds to Step S 46 . 
     In Step S 45 , the value of the parameter of the second field device  22  associated with the selected parameter of the first field device  21  is replaced with the value of the parameter of the first field device  21 , and the process proceeds to Step S 48 . 
     In Step S 46 , an operation of designating the parameter of the second field device  22  to be associated with the selected parameter of the first field device  21  is received, and the process proceeds to Step S 47 . In this case, the receiving unit  15  receives the operation of the user. The user may designate the parameter of the second field device  22  to be associated with the selected parameter of the first field device  21 . The association of the parameter designated by the user is stored in the receiving unit  15 . 
     In Step S 47 , the value of the parameter of the second field device  22  associated with the selected parameter of the first field device  21  is replaced with the value of the parameter of the first field device  21 , and the process proceeds to Step S 48 . 
     In Step S 48 , it is determined whether the values of all of the parameters of the first field device  21  have been replaced (Steps S 43 , S 45 , and S 47 ). If “Yes”, the process proceeds to Step S 49 . If “No”, the process returns to Step S 41 , and the next parameter is selected. 
     In Step S 49 , the data of the operation log of the second field device  22  is replaced with the data of the operation log of the first field device  21 . Thus, device information data to be written to the second field device  22  is generated. 
     Then, in Step S 5  ( FIG. 2 ), the writing unit  14  writes the device information data converted by the conversion unit  13 , and the process ends. The device information data is transmitted and stored in the second field device  22 . 
     As described above, according to the device information setting apparatus of this embodiment, it is possible to automatically set the value of the parameter with the same label name or the value of the parameter associated by the user. Therefore, it is possible to significantly reduce a workload for setting device information, for example, when the device is changed to another device with a different revision. 
     In addition, the user may associate the parameters, store the association, and reuse the association to automatically set the device information. Therefore, it is possible to reduce a workload, for example, when the device is changed to a device of another company. 
     It is also possible to use the device information setting apparatus according to this embodiment to initially set the device information. In this case, a device to be initially set corresponds to the second field device. In addition, the second field device may not be a real device, but it may be a virtual device implemented on the computer. In this case, it is possible to use the device information setting apparatus for, for example, simulations or education. 
     While the present invention has been shown and described with reference to certain exemplary embodiments thereof, other implementations are within the scope of the claims. It will be understood by those skilled in the art that various changes in form and details may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.