Hitachi, Ltd.

Hitachi Industry & Control Solutions, Ltd.

Hitachi Information & Control Solutions, Ltd.

Shoichi Ozawa

Eiji Kobayashi

Wataru Sasaki

Yusaku Otsuka

Masakazu Ishikawa

Shin Kokura

Satoru Funaki

Naoya Mashiko

Akihiro Onozuka

Yu Iwasaki

Akihiro Nakano

Akira Bando

Masahiro Shiraishi

Yusuke Seki

Yasuhiro Kiyofuji

Toshiki Shimizu

Masamitsu Kobayashi

Tatsuyuki Ootani

Hideaki Masuko

Takashi Umehara

Yasuyuki Furuta

Akira Bandou

Yuusuke Seki

Takenori Kasahara

Ryo Fujita

Hideyuki Yoshikawa

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

Growing community of inventors

Hitachi, Japan

Shoichi Ozawa