×

Multiple remote terminal digital control system

  • US 4,156,866 A
  • Filed: 02/28/1978
  • Issued: 05/29/1979
  • Est. Priority Date: 10/07/1976
  • Status: Expired due to Term
First Claim
Patent Images

1. An electrical control system for controlling a plurality of electrical loads comprising:

  • central controller means;

    a plurality of control means each associated with a respective one of said loads;

    each of said control means including means for controlling its respective associated load and each of said control means having a plurality of control states;

    said central controller means incuding means for selectively transmitting multibit digital serial messages, each of said serial messages consisting of a plurality of individually unique multibit address signals, each corresponding to one of said terminal means and each of said serial messages further including a command signal;

    each of said control means including terminal means;

    a common bus connecting said central controller means and each of said terminal means adapted to receive and transmit said serial messages from said central controller means to all of said terminal means;

    each terminal means including means responsive to the receipt of at least two consecutive serial messages containing its corresponding unique address signal to cause said control means to assume one of said states, each state corresponding to a differing combination of command signals transmitted in said consecutively received serial messages;

    whereby each of said control means is caused to assume one of said states upon receipt of said consecutive serial messages both containing said unique address signal and a combination of command signals in said consecutive messages corresponding to said state.

View all claims
  • 0 Assignments
Timeline View
Assignment View
    ×
    ×