Integrated security system having a multiprogrammed controller
AssigneeAmerican District Telegraph Company
InventorsRoy L. Harvey, Kevin J. Griffin, Aaron A. Galvin, Louis H. Auerbach
Life of this patent
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Abstract
A security system continuously monitoring a plurality of spatially diverse events which are reportable to a central monitoring facility, the system including a controller for sequencing the performance of reporting and monitoring tasks according to the requirements of the events. The system also performs the tasks according to a predetermined priority, in particular, alarm message queuing. In addition, alarm conditions and system operation are verified by specified communication procedures and redundancies. Furthermore, system communications capabilities include keyboard entry and output display and an interrupt facility.
Claims27
A security system comprising:
- a control unit;
- a plurality of cables, each connected to the control unit and each having a respective address;
- a plurality of point interface devices each having a respective address, and at least one point interface device being connected to each of said cables;
- each of the point interface devices being operative to provide a signal in response to and representative of a sensed condition;
- said control unit including:
- means for simultaneously addressing point interface device on different cables;
- means for simultaneously receiving signals from the addressed point interface devices on different cables;
- and
- processing means for sequentially processing the signals received from the point interface devices.
A security system comprising:
- a control unit;
- input means receiving system codes, the operation of said control unit being alterable according to said system codes;
- a cable connected to the control unit;
- a plurality of point interface devices each having a respective address, and each being connected to said cable;
- each of the point interface devices being operative to provide a signal in response to and representative of a sensed condition;
- said control unit including:
- means for addressing each point interface device;
- means for receiving signals from the addressed point interface devices and simultaneously receiving signals from said input means;
- processing means for sequentially processing the signals received from the point interface devices and from said input means;
- and
- means for incrementing the address of the point interface devices connected to said point interface devices.
A security system comprising:
- a plurality of remote point interface devices;
- a status indicator;
- operator control means;
- a controller connected to said point interface devices, status indicator and operator control means, the controller including:
- means to communicate with said remote point interface devices, status indicator and operator control means;
- and
- task selection means connected to said plurality of remote interface devices and operator control means for performing a plurality of tasks in a predetermined stack order in accordance with the priority of the tasks and an interrupt routine to transfer data between the controller and said means to communicate with said remote point interface devices.
Dependencies are inferred from the claim text.