Siemens Building Technologies, Inc.

Jim Coogan

Mark B Gagner

Theo Frutiger

Margaret Ruane

Brian Kreger

An environmental control system is configured to accept network variable outputs from a plurality of sources on a single network variable input and the update values are stored in a data structure for the computation of control variable values. The system includes a sink controller having a network variable input and a plurality of sources, each having at least one network variable output coupled to the network variable input of the sink controller. A data structure is provided so that update values from the sources may be stored in the structure with reference to the sources that provided the update values. Aggregate values, such as a mean average, minimum value, maximum value, standard deviation, variance, sum, or product may be computed from the values stored in the data structure.

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Des Plaines, IL, United States of America

Jim Coogan