Distributed digital control system including modules with multiple stored databases and selector
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United States of America Patent
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Feb 6, 2001
Grant Date -
N/A
app pub date -
Oct 6, 1997
filing date -
Oct 6, 1997
priority date (Note) -
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Abstract
A distributed digital control system includes a plurality of control modules which are interconnected by a communication link. Each module includes a processor unit for running a control program, and a plurality of system databases which correspond to nodes in the system. Each module further includes a selector such as a Dual Inline Package (DIP) switch for inputting a node number. The program automatically selects the database corresponding to the input node number when the module is powered up. The system preferably utilizes the industry standard LonTalk.RTM. protocol, with each database including Standard Network Variable Types (SNVTs) and Standard Configuration Parameter Types (SCPTs) for the respective node. A default database is also stored in each module, which is automatically used by the program if the system databases are not found.
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