摘要:
In a fire alarm system or the like, a plurality of terminals (T₁₁-T₄₄) such as fire detectors or repeaters are connected in plural groups (G1-G4) to a central receiver unit. During system polling of the groups individually those groups respond to the receiver unit which have a status change in any of its terminals. By subsequent point polling of the terminals individually only in that group which had responded during system polling, a responded terminlal is determined very quickly and reliably. Thus, information is collected and processed selectively from the terminal which responded during the point polling.
摘要:
In a fire alarm system or the like, a plurality of terminals (T₁₁-T₄₄) such as fire detectors or repeaters are connected in plural groups (G1-G4) to a central receiver unit. During system polling of the groups individually those groups respond to the receiver unit which have a status change in any of its terminals. By subsequent point polling of the terminals individually only in that group which had responded during system polling, a responded terminlal is determined very quickly and reliably. Thus, information is collected and processed selectively from the terminal which responded during the point polling.