Distributed control system
First Claim
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1. A system for performing, from a central location, a selected one of a plurality of electrical functions at a selected one of a plurality of remote locations, comprising:
- a central processing unit at said central location;
means at said central location for storing a plurality of digital address and functions codes, and electrical function control state information;
encoding means responsive to the control information from said storing means upon enablement by said central processing unit for generating a programmable combination of frequency and digital address and function codes received from said storing means;
means for directly coupling each of said remote locations to said encoding means;
at least one receiver-decoder means at each of said remote locations, each of the respective receiver-decoder means within each remote location having a common address code unique to said remote location;
means responsive to each of said receiver-decoder means, respectively, for performing said selected one of the plurality of electrical functions at said selected one of the plurality of remote locations; and
transmitting means at at least one predetermined one and less than all of said remote locations for transmitting, independent of transmission from said encoding means to said receiver-decoder means, tone-encoded signals back to said central processing unit for obtaining a pre-programmed combination of electrical function control states from said storing means and causing said encoding means to generate a digital address and function code and a frequency for coupling to said receiver-decoder means by said coupling means for modifying the conditions of those predetermined ones of said means responsive to each of said receiver-decoder means selected from said storing means responsive to the signals transmitted back to said central processing unit from said at least one remote location.
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Abstract
A redundant digital address and function code is generated at a central location and transmitted through a signal circuit or an A.C. power distribution circuit to a plurality of receiver locations. At each addressed receiver location, the encoded function is performed to control selected loads in a predetermined manner. A signal may be transmitted back to the central location for controlling a pre-programmed combination of loads in response thereto.
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Citations
9 Claims
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1. A system for performing, from a central location, a selected one of a plurality of electrical functions at a selected one of a plurality of remote locations, comprising:
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a central processing unit at said central location; means at said central location for storing a plurality of digital address and functions codes, and electrical function control state information; encoding means responsive to the control information from said storing means upon enablement by said central processing unit for generating a programmable combination of frequency and digital address and function codes received from said storing means; means for directly coupling each of said remote locations to said encoding means; at least one receiver-decoder means at each of said remote locations, each of the respective receiver-decoder means within each remote location having a common address code unique to said remote location; means responsive to each of said receiver-decoder means, respectively, for performing said selected one of the plurality of electrical functions at said selected one of the plurality of remote locations; and transmitting means at at least one predetermined one and less than all of said remote locations for transmitting, independent of transmission from said encoding means to said receiver-decoder means, tone-encoded signals back to said central processing unit for obtaining a pre-programmed combination of electrical function control states from said storing means and causing said encoding means to generate a digital address and function code and a frequency for coupling to said receiver-decoder means by said coupling means for modifying the conditions of those predetermined ones of said means responsive to each of said receiver-decoder means selected from said storing means responsive to the signals transmitted back to said central processing unit from said at least one remote location. - View Dependent Claims (2, 3)
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4. A system for performing, from a central location, a selected one of a plurality of electrical functions at a selected one of a plurality of remote locations, comprising:
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a central processing unit as said central location; means at said central location for storing a plurality of digital address and function codes and electrical function control state information; encoding means responsive to the control information from said storing means upon enablement by said central processing unit for generating a programmable combination of frequency and digital address and function code received from said storing means; means for directly coupling each of said remote locations to said encoding means; at least one receiver-decoder means at each of said remote locations, each of the respective receiver-decoder means within each remote locating having its own unique address code; means responsive to each of said receiver-decoder means, respectively, for performing said selected one of the plurality of electrical functions at said selected one of the plurality of remote locations; and transmitting means at at least one predetermined one and less than all of said remote locations for transmitting, independent of transmission from said encoding means to said receiver-decoder means, tone-encoded signals back to said central processing unit for obtaining a pre-programmed combination of electrical function control states from said storing means and causing said encoding means to generate a digital address and function code and a frequency for coupling to said receiver-decoder by said coupling means for modifying the condition of those predetermined ones of said means responsive to each of said receiver-decoder means selected from said storing means responsive to the signals transmitted back to said central processing unit from said least one remote location. - View Dependent Claims (5, 6, 7, 8, 9)
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Specification