Mitsubishi Electric Corporation

Kiyohito Miyazaki

Naoki Ito

A network construction support system () generates one or more pieces of layout data () indicating a layout of construction assisting tools (). The network construction support system calculates a countermeasure cost and an estimated risk amount, for each layout data, the countermeasure cost increasing as a number of units of construction assisting tools increases, the estimated risk amount decreasing as the number of units of construction assisting tools increases and as a narrowed range by each construction assisting tool narrows. The network construction support system judges an appropriateness of the layout data for the apparatus network system, for each layout data, on the basis of a countermeasure cost, an estimated risk amount, and an allowable risk amount which is allowed for the apparatus network system, The network construction support system outputs layout data judged to be appropriate for the apparatus network system.

Network construction support system

A safety communication device includes: a safety layer parameter acquisition part to acquire a reception bit rate of safety layer data being received per unit time; a threshold value setting part to set a request error rate requested as an upper limit of a bit error rate of the safety layer data received per unit time, on the basis of a request value corresponding to a bit error rate request being requested as an upper limit of an error occurrence probability per bit during data communication in a non-safety network, and a reception bit rate; and a safety monitoring control part to compare the bit error rate of the safety layer data received within a unit time, with the request error rate, and to perform safety control on the basis of a comparison result.

Safety communication device, safety communication system, safety communication method, and computer readable medium

A checksum negotiation unit selects as a candidate polynomial, a candidate for a generator polynomial to be used in communication between a safety master device and a safety slave device from a plurality of polynomials. A communication cycle verification unit determines whether or not a calculation using the candidate polynomial is completed in each of the safety master device and the safety slave device by a predetermined deadline. The communication cycle verification unit designates the candidate polynomial as the generator polynomial when it is determined that the calculation using the candidate polynomial is completed in each of the safety master device and the safety slave device by the deadline.

Information processing device, information processing method, and computer readable medium

A region specifying unit specifies a first region where a regular bit string is in a transmission frame, a second region which has a bit string similar to a defined bit string, and a third region which has a non-regular bit string and extracts a difference between the bit string in the second region and the defined bit string. A first CRC acquisition unit acquires a first CRC corresponding to the regular bit string. A second CRC acquisition unit acquires a second CRC corresponding to the defined bit string. A differential CRC acquisition unit acquires a differential CRC corresponding to the extracted difference. A third CRC generation unit generates a third CRC corresponding to a bit string in the third region. A frame CRC generation unit generates a CRC of the transmission frame using the first CRC, the second CRC, the differential CRC, and the third CRC.

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Tokyo, Japan

Kiyohito Miyazaki