HVAC synchronization

Details HVAC synchronization HVAC synchronization

2011-05-17

2011-05-17

Connolly, Mark (Department: 2115)

Electrical computers and digital processing systems: support

Synchronization of clock or timing signals, data, or pulses

C713S500000, C713S503000

Reexamination Certificate

active

07945799

ABSTRACT:
Systems and methods are described for synchronizing an HVAC control system. A method, includes: a synchronization sequence including: reading a base time from an internal clock at a first time and saving the base time; measuring an elapsed time interval, from the first time to a second time, by counting an external clock using a frequency counter; and then resetting the internal clock to the base time plus the elapsed time.

REFERENCES:
patent: 5748923 (1998-05-01), Eitrich
patent: 5767747 (1998-06-01), Pricer
patent: 5826066 (1998-10-01), Jardine et al.
patent: 6591370 (2003-07-01), Lovett et al.
patent: 2007/0038690 (2007-02-01), Guilford

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