Honeywell XI581AH User Manual page 10

GETTING STARTED
EN2B-0126 (74-3554-8)
Local
Excel
Controller
XI581AH/
XI582AH
Connection capabilities depend on the version of the controller and whether it has
buswide access mode software. Table 2 specifies the versions capable of buswide
access.
There are two buswide access modes (active and passive) for controllers that have
this capability.
• With active buswide access, a controller (for example, Controller A) can access
another controller (Controller B) on the same bus if Controller B has at least
passive access.
Controller A
active buswide
access
XI581AH/
XI582AH
Fig. 8. Active buswide access.
• With only passive buswide access, a controller (for example, Controller B) can-
not access another controller (Controller A) on the same bus. However, since
Controller B has at least passive buswide access, Controller B can be accessed
by another controller that has active mode (in this case, Controller A).
6
XI581/2 BUSWIDE OPERATOR INTERFACE
C-Bus
Remote Excel
Controller
Buswide
Access
Fig. 7. Buswide access.
C-Bus
Controller B
active or passive
buswide access
Buswide
Access