Trane Tracer ZN.520 Manual page 52

Table 32 Effect of occupancy commands on the controller
Occupancy—manual
command
Occupied
Unoccupied
Occupied bypass
(Note 1)
Occupied standby
Invalid or not present
Note 1: Occupied bypass is initiated by either a communicated request or a local input. The effective occupancy is occupied bypass.
Note 2: The occupancy sensor can be either a local input or a communicated input. If a valid value for the network input is present, it has precedence over
the local input.
Note 3: If the occupancy sensor communicated input is invalid or not present, and no local input exists, the controller's mode is occupied.
50
Sequence of operation
Trane systems and zone sensors do not communicate this information to the
controller, but the Tracer ZN.520 zone controller accepts this network variable
as communicated input nviOccManCmd.
Occupancy—schedule
Building automation systems normally communicate an occupancy request
using the occupancy—schedule input. The Tracer ZN.520 zone controller
accepts communicated occupancy schedule as a network variable input known
as nviOccSchedule.
Occupancy—sensor
Some occupancy sensors may be equipped with the ability to communicate an
occupancy mode to the controller. In such devices, a network variable input k
known as nviOccSensor is used to communicate occupancy to the controller.
Trane systems and zone sensors do not currently send this variable. The
hardwired occupancy input of this controller is handled as if it is a
communicated occupancy sensor input. When both a hardwired input and a
communicated input exist, the communicated input will be used.
Occupancy—schedule
Any state
Any state
Occupied
Unoccupied
Occupied standby
Invalid or not present
Any state
Occupied
Unoccupied
Occupied standby
Invalid or not present
Occupancy—sensor
(Note 2)
Occupied (Note 3)
Unoccupied
Any state
Any state
Any state
Any state
Occupied (Note 3)
Unoccupied
Any state
Occupied (Note 3)
Unoccupied
Any state
Any state
Occupied (Note 3)
Unoccupied
Controller's effective
occupancy
Occupied
Occupied
Unoccupied
Occupied
Occupied bypass
Occupied bypass
(Note 1)
Occupied
Occupied bypass
(Note 1)
Occupied standby
Occupied
Occupied standby
Unoccupied
Occupied standby
Occupied
Unoccupied
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