Network data server for use with programmable logic controllers

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39520043, 39520046, 39520049, 39520059, 364DIG1, G06F 1300

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active

058156593

ABSTRACT:
A network data server apparatus is connected to a plurality units of PLC 3.sub.1 to 3.sub.n as well as to at least one unit of FA controller in a manner enabling bidirectional communications. Provided in the network data server apparatus are a memory for PLC enabling read/write of PLC data and a copy data list section with memory addresses from which data is copied and those at which data is copied described therein, and data copying is executed by a control means according to the memory addresses from which data is copied and those at which the data is copied.

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