| 摘要 |
PURPOSE:To reduce the system cost, to improve the software reliability and to attain high speed control by providing a dual port memory to the transmission side and the reception side and allowing them to apply automatic communication of data equivalently mutually. CONSTITUTION:Since automatic communication of periodical data is applied sequentially between communication interfaces 12-1 and 12-2, a multi-frame data is written in dual port memories 28, 34 and they are shared in common by CPUs 10-1, 10-2, resulting that the CPUs 10-1, 10-2 attain interlocked control at a high speed. Moreover, since the CPUs 10-1, 10-2 are relieved from the overhead of data communication completely, the program is simplified and the software development is facilitated.
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