Mitsubishi Heavy Industries Limited

Minoru Nakaide

Shinichi Toda

Yoshikane Yamanaka

An object is to provide a control device, a control method thereof, and a control program that can simplify the configuration. The control device (C) configured to control a control target instrument includes: an input unit (IN) configured to accept input of an input signal including input information and transmit the input information to a communication network (NW); and a CPU_configured to receive the input information from the input unit (IN) via the communication network (NW) and perform control based on the input information, and the CPU_transmits the received input information via the communication network (NW) to a CPU_configured to control a control target instrument in another device (C) provided independently of the control device (C).

Control device, control method thereof, and control program

The control device is configured to communicate with another device via a communication network, and comprises: a key acquisition unit configured to acquire, from a key distribution server via the communication network, an encryption key with a life period for performing encrypted communication with the another device; an encrypted communication processing unit configured to perform the encrypted communication with the another device using the encryption key within the life period; a server state detection unit configured to detect a key acquisition disabled state where acquisition of the encryption key by the key acquisition unit is disabled; and a life extension unit configured to perform extension processing for extending the life period if the key acquisition disabled state is detected.

Control device, industrial control system, and encryption key life extension method

A computing device for configuring a redundant system includes: a detection unit configured to detect another computing device newly added to the redundant system during operation of the computing device; and a construction processing unit configured to execute construction processing for constructing a redundant configuration with the other computing device. The construction processing unit includes a first transmission unit for identifying construction start state information, and transmitting the construction start state information to the other computing device, and a second transmission unit for repeatedly performing identification of a change difference that arises in the state information as a result of computing processing of the computing device performed after identifying the construction start state information, from a time when the construction start state information was identified or a time when a previous timing was reached, and transmission of the change difference to the another computing device.

Computing device, redundant system, program, and method for constructing redundant configuration

An information processing apparatus includes an MMU that translates between a virtual address and a physical address on the basis of a translation table for translation between physical addresses that are addresses in physical memory and virtual addresses that are addresses in virtual memory. Stored in a RAM are page table information indicating a page table, as well as error detection information attached to the page table information for detecting the presence or absence of an error in translation between a virtual address and a physical address performed by the MMU. A CPU detects the presence or absence of an error in translation between a virtual address and a physical address performed by the MMU on the basis of the error detection information.

Address translation checking device, central processing unit, and address translation checking method

A CPU changes the operating mode to a test mode in which the CPU does not terminate a program being executed even if an MMU outputs a CPU exception notification, outputs an address signal for causing the MMU to output a CPU exception notification to the MMU in the test mode, and detects whether or not a CPU exception notification is input after the address signal is output to the MMU. This allows inspection as to whether or not a fault that prevents detection of an illegal access has occurred in the MMU while executing another program.

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Tokyo, Japan

Minoru Nakaide