METHOD FOR PASSING A FAILSAFE ALARM SIGNAL THROUGH A LIFE SAFETY SYSTEM THAT EXPERIENCES A CATASTROPHIC FAILURE
First Claim
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1. A method, comprising:
- detecting a catastrophic failure within a network node of a life safety system;
generating a fault signal indicative of the detected catastrophic failure;
detecting an alarm condition indicative of a life safety emergency; and
passing a failsafe alarm signal through the network node despite the detected catastrophic failure.
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Abstract
An improved life safety system provides ability to detect a catastrophic failure within a network node of the life safety system, and to subsequently pass a failsafe alarm signal through a network node, and through the life safety system, despite the catastrophic failure, which may be a failed main processor of a main panel, a failed main processor of a loop expander module, a failed main processor of an amplifier, or a failed main processor of a liquid crystal display controller.
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Citations
12 Claims
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1. A method, comprising:
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detecting a catastrophic failure within a network node of a life safety system; generating a fault signal indicative of the detected catastrophic failure; detecting an alarm condition indicative of a life safety emergency; and passing a failsafe alarm signal through the network node despite the detected catastrophic failure. - View Dependent Claims (2, 3, 4)
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5. A life safety system, comprising:
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a network node including one or more expansion panels communicatively coupled with a data bus, wherein each of the one or more expansion panels includes a main processor and a subcomponent, and wherein the subcomponent is configured to detect a failure of the main processor, to detect an alarm condition indicative of a life safety emergency, and, in response to the alarm condition, to pass a failsafe alarm signal through the network node via the data bus despite the detected failure of the main processor. - View Dependent Claims (6, 7, 8, 9, 10, 11, 12)
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Specification