Mitsubishi Electric Corporation

Shuichiro Senda

Shigekazu Okamura

Masuo Ito

Hirohito Nishiyama

Daisuke Tanimoto

Makoto Isoda

Tatsunori Tsujimura

Control information from a plurality of applicationsis written into a shared memoryas needed. A communication parttransmits the control information written in the shared memoryto a DHMin each transmission cycle which is constant. In a management table, a plurality of allowable delay times is defined, the allowable delay time being a delay time allowable at an urgent transmission of the control information. A transmission timing notification partdivides a transmission cycle into time slots each of which is equal to or shorter than the shortest allowable delay time defined in the management table. The communication parttransmits the control information in the shared memoryto the DHMbefore arrival of the transmission cycle, in a unit of time slot.

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Tokyo, Japan

Shuichiro Senda