Abstract: Each of communication control units that perform communication using EtherNet/IP executes data processing for reading of a state value stored in a state value management unit and/or writing of the state value to the state value management unit on the basis of first setting information, and executes exchange of frame data including the state value with the communication control unit of a communication partner on the basis of second setting information. If one communication control unit has failed the data processing, this information processing device displays, on a display, the first setting information of the one communication control unit and the second setting information of the communication control unit in a comparable manner, and if a pair of communication control units have failed exchange of frame data, the information processing device displays, on the display, the second setting information of one communication control unit and connection information in a comparable manner.