Kabushiki Kaisha Toshiba

Toshiba Infrastructure Systems & Solutions Corporation

Daichi Motojima

Motohiko Okabe

A remote I/O system includes an information network control module, I/O interface modules, and a remote I/O module. The information network control module includes a common memory and a second control IC. The second control IC includes a variation detecting circuit that includes a data latch buffer that stores read data from an information network; and a variation detection memory that stores data previously read from the information network. The variation detecting circuit compares data stored in the data latch buffer with data stored in the variation detection memory, to detect a variation in the data. The second control IC transmits, to the I/O interface module, by cyclic scan transmission, data from one of the scan memory areas corresponding to the data having the variation detected by the variation detecting circuit.

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Shinagawa, Japan

Daichi Motojima