×

Characterizable distribution means in a supervisory and control system

  • US 4,332,013 A
  • Filed: 05/12/1980
  • Issued: 05/25/1982
  • Est. Priority Date: 05/12/1980
  • Status: Expired due to Term
First Claim
Patent Images

1. In a system for monitoring and controlling a plurality of control point apparatus which sense environmental, temperature and other parameters and which control equipment which affects the same, the system being of the type which has at least one central control computer means and a pluraity of said control point apparatus, a distribution means for receiving and transmitting data signals from and to said central control computer means and from and to said control point apparatus, said distribution means comprising:

  • means for interfacing at least one function means, each of which interacts with at least one of said control point apparatus operatively associated therewith, said interfacing means processing data signals to and from said function means and processing data signals to and from said central control computer means;

    said function means including at least one means for receiving digital input signals from at least one of said control point apparatus, said digital input receiving means having processing means which receives characterizing signals originating from said central control computer means for characterizing the same to operate in one of first and second modes with respect to each associated control point apparatus, said first mode causing the same to receive signal pulses and retain an accumulated total of said pulses, said processing means also being adapted while in said first mode to receive characterizing commands for defining a predetermined accumulated total for each control point apparatus which represents a significant change of value from said control point apparatus, said processing means also being adapted while in said first mode to receive command signals from said central control computer means to characterize the same to provide an output signal for transmission to said central control computer means when said predetermined total is reached, said second mode causing said processing means to receive signal pulses which are indicative of the change of state of an electrical switch contact associated with said associated control point apparatus and provide an output signal for transmission to said central control computer means indicating a change in the state of said switch contact.

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