Distributed automation system
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United States of America Patent
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-
May 13, 2003
Grant Date -
N/A
app pub date -
Oct 7, 1999
filing date -
Oct 8, 1998
priority date (Note) -
Expired
status (Latency Note)
Importance
Abstract
A distributed automation system comprising a programmable logic controller connected to programmable logic controllers equipped with a host unit and couplers communicating with the host unit through the back panel bus. One of the couplers is connected through a bus to associated equipment, wherein the coupler can communicate with the associated equipment through a server function using the TCP/IP protocol. The server coupler is provided with a mass memory containing (1) 'PLC variables' type software objects that manage access to PLC variables, and (2) 'manufacturer' type software objects that transform information from PLC variable objects to manufacturer-type information that can be used by the associated equipment.
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