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Addressing system for simultaneously polling plural remote stations

  • US 4,667,193 A
  • Filed: 12/13/1983
  • Issued: 05/19/1987
  • Est. Priority Date: 12/13/1983
  • Status: Expired due to Term
First Claim
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1. A system having a central controller for polling a plurality of remote control modules, said controller polling groups of said remote control modules simultaneously and for resolving contentions when two or more remote control modules respond to a polling request by polling continuously smaller and/or different groups of remote control modules until contentions are resolved, said system comprising:

  • central controller means for transmitting a polling message, said polling message including an address of N bits for defining a group of addresses relating to a group of remote control modules selected by said central controller to be polled;

    communications means connected to said central controller;

    a plurality of remote control modules connected to said communication means for receiving said polling message, each of said remote control modules having a unique N bit address stored therein and address comparison means for comparing said N bit address in said poll message to said N bit address of said remote control module to determine if said remote control module is within said group of remote control modules to be polled.

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