Trane Tracer AH540 User Manual

Occupancy modes
CNT-SVX05B-EN 45
Occupancy—schedule
Building automation systems normally communicate an occupancy
request to the Tracer AH540/541 controller using a network variable
input (nviOccSchedule).
Occupancy—sensor
Some occupancy sensors may be equipped with the ability to communi-
cate an occupancy mode to the controller. In such devices, network vari-
able input (nviOccSensor) is used to communicate occupancy to the
controller. Trane systems and zone sensors do not currently send this
variable. The hard-wired occupancy input of this controller is handled as
if it is a communicated occupancy sensor input. When both a hard-wired
input and a communicated input exist, the communicated input is used.
Ta b l e 1 8 : Effective occupancy arbitration for Tracer AH540/541 with operator display
Manual
override
1
(nviOccMan
Cmd)
Commun-
icated
schedule
(nviOcc
Schedule)
Local
schedule
Occupancy
sensor
(nviOcc
Sensor
3
)
Local
occupancy
binary input
Bypass
timer
4
Result
(nvoEffect
Occup)
Occupied—————Occupied
Unoccupied — — — — zero Unoccupied
not zero Bypass
Bypass Occupied — — — — Occupied
Unoccupied — — — zero Unoccupied
not zero Bypass
Standby — — — zero Standby
not zero Bypass
Null
2
Occupied — — — Occupied
Unoccupied — — zero Unoccupied
not zero Bypass
Null Occupied — — Occupied
Unoccupied — zero Unoccupied
not zero Bypass
Null Occupied — Occupied
Unoccupied zero Unoccupied
not zero Bypass
Not present — Occupied
1 This value is the last enumeration received. It can come from either the nviOccManCmd network variable or the operator dis-
play schedule override.
2 Null = any other value.
3 The variable nviOccSensor is used with the SCC profile only. Refer to the Null rows in this column for the DAC profile.
4 This value represents whether or not the bypass timer is at zero or not. When a bypass request is made, the timer is set to the
value specified in the Occupied Bypass Timer field, and it begins to count down. While it is counting down, the value is not
zero. When the count down is complete, the value is zero.

Trane Tracer AH540 Specifications

General

Brand	Trane
Model	Tracer AH540
Category	Controller
Language	English