G - Physics – 08 – B
Patent
G - Physics
08
B
G08B 29/00 (2006.01) G08B 17/10 (2006.01) G08B 26/00 (2006.01) G08B 29/12 (2006.01)
Patent
CA 2343527
A software driven monitoring system includes a common control element coupled to a plurality of monitoring devices. The devices can indicate to the control element that a predetermined condition has been detected. Where the control element transmits a status inquiry command to the devices, those devices exhibiting the status provide the same indication to the control element as is indicative of the predetermined condition. One indication is a shunt or a short circuit of a medium between the common control element and the devices. An existing system can be upgraded by installing the control element, or upgrading an existing control program. Alternately, the devices can be installed in a system wherein the control element does not issue the status inquiry command. In those installations, the monitoring devices never issue a status reply as the required command is never received.
Jen Hsing C.
Rauworth Timothy A.
Slater James S.
Bereskin & Parr Llp/s.e.n.c.r.l.,s.r.l.
Pittway Corporation
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