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Interruption handling system in time division multiplex remote control system

  • US 4,586,040 A
  • Filed: 03/30/1983
  • Issued: 04/29/1986
  • Est. Priority Date: 05/15/1982
  • Status: Expired due to Term
First Claim
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1. A time division multiplex remote control system for data transmission between a central controller and addressable remote terminals coupled to the central controller through a signal line, said terminals being divided into groups each group including a predetermined number of terminals,said central controller comprisingtransmission signal generating means for generating a transmission signal to be transmitted, said transmission including terminal identifying information for identifying one of said terminals which is to receive said transmission signal to be transmitted, control information indicating a control to be performed in said terminal, and a reply signal standing-by period defining signal for defining a period for receiving a reply signal returned from the terminal identified by said terminal identifying information, said terminal identifying information including group address identifying information identifying a group in which each terminal is included and individual terminal identifying information for identifying individually the terminal included in the group,transmission signal transmitting means for transmitting as the transmission signal group address identifying information as the terminal identifying information generated by said transmission signal generating means,receiving means for receiving a signal sent by said terminals, andcontrol information producing means responsive to the received reply signal for producing necessary control information,each of said plurality of terminals comprising:

  • store means for storing identifying information identifying the terminal,receiving means for receiving the transmission signal being transmitted from said central controller,control information accepting means responsive to the receiving means for accepting said control information included in said transmission signal when the received terminal identifying information coincides with the identifying information stored in the store means,reply signal transmitting means responsive to the receiving means for transmitting a reply signal in response to the reply signal standing-by period defining signal included in the received transmission signal when the received terminal identifying information coincides with the identifying information stored in the storing means,change-of-supervisory input detecting means for detecting a change of the supervisory input of an object to be controlled which the terminal supervises and producing an output,interruption request signal generating means for generating an interruption request signal in response to the output from the change-of-supervisory input detecting means, andinterruption request signal transmitting means for transmitting an interruption request signal generated in the interruption request signal generating means at a timing other than reply signal transmitting timing, andsaid central controller further comprising;

    group accessing mode signal generating means, responsive to the interruption request signal transmitted by the interruption request signal transmitting means of the terminal, for generating a group accessing mode signal for specifying a mode of accessing the terminals by group.

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