Hitachi, Ltd.

Hitachi Information & Control Solutions, Ltd.

Hitachi Engineering Services Co., Ltd.

Hitachi Industry & Control Solutions, Ltd.

Yu Iwasaki

Wataru Sasaki

Yusaku Otsuka

Shin Kokura

Naoya Mashiko

Akira Bando

Masamitsu Kobayashi

Eiji Kobayashi

Masakazu Ishikawa

Satoru Funaki

Akihiro Onozuka

Akihiro Nakano

Shoichi Ozawa

Ryuichi Murakawa

Hideyuki Yoshikawa

Masahiro Shiraishi

Yusuke Seki

Yasuhiro Kiyofuji

Toshiki Shimizu

Hideaki Masuko

Tatsuyuki Ootani

Takashi Umehara

Yasuyuki Furuta

Akira Bandou

Yuusuke Seki

Takenori Kasahara

The present invention provides a duplexed operation processor control system that includes operation processors, an I/O device, and at least one communication path that couples the operation processors to the I/O device, and at least one communication path that couples the operation processors with each other. The duplexed operation processor control system switches over either of the operation processors to be a primary operation processor that executes a control operation for a control target, and the other to be a secondary operation processor that is in a stand-by state, and the secondary operation processor snoops control data synchronously when the primary operation processor acquires the control data from the control target.

Duplexed operation processor control system, and duplexed operation processor control method

In a control apparatus which transmits/receives data from a central processing unit via a serial transfer channel to a communication control unit, and groups/distributes data of input/output units from the communication control unit via a parallel transfer channel, the control apparatus initiates a diagnosing unit of the parallel transfer channel in response to an instruction issued from the central processing unit, and diagnosis the input/output units subsequent to the diagnosis of the transmission channel. Data input/output timing of the input/output unit is also instructed from the central processing unit, so that the central processing unit can suppress lowering of response speeds caused by the diagnoses, and can maintain the periodicity of the data input/output.

Control apparatus, control method and control program

A control apparatus for an input-output device includes a hardware part and a software part, in which a controller in the hardware part carries out a control operation in accordance with a signal from the input-output device, outputs a result of the control operation to a process, and has a timer unit to be excited at a constant period; and the software part has an information process part, a control process part, and an interrupt control unit to switch over the information process part and control process part one another, in which the interrupt control unit suspends an execution of the information process part to execute the control process part in priority and resume the information process part by switching over to the information process part from the control process part, when the execution of the control process part is terminated.

Control apparatus for process input-output device

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Hitachi, Japan

Yu Iwasaki