Life safety system having a panel network with message priority

Details Life safety system having a panel network with message priority Life safety system having a panel network with message priority

1996-05-10

1998-07-28

Lee, Thomas C.

39520054, 39520038, 395830, 395823, G06F 1300, G06F 1318, G06F 1516

Patent

active

057872589

ABSTRACT:
A life safety system having message priority of a network of panels, each panel including a first module in the form of a central processing unit, and a plurality of local I/O modules connected to the central processing unit and to each other. To establish a message priority in communication between the panels, including a two-state token form of coded invitations to transmit messages, the first state of the token represents the low priority invitation and the second state of the token represents the high priority invitation. Moreover, to further establish message priority including the passing of tokens continuously between panels to determine if any panel has the high priority message, that panel having the high priority message preempts communication of such messages between panels by first capturing the high priority state token.

REFERENCES:
patent: 5347515 (1994-09-01), Marino
patent: 5528594 (1996-06-01), Butter et al.
patent: 5613073 (1997-03-01), Hammond, Jr. et al.
patent: 5634006 (1997-05-01), Baugher et al.
patent: 5655149 (1997-08-01), Muegge et al.

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