Data Sheet for Product

Page 4 of 13 Document No. 588-209
Occupancy Control
Occupancy Mode
The Predator controller defaults to the occupied mode of operation. Upon receipt of the 4-
state LonMark occupancy override (nviOccManCmd), the controller will switch to the
appropriate mode of operation. A brief summary of each mode follows below:
LonMark
Occupancy State Mode Description
(0) Occupied Controller in Occupied mode and uses Occupied setpoints.
(1) Unoccupied Controller in Unoccupied mode and uses Unoccupied
setpoints.
(2) Bypass Controller temporarily in Occupied mode and uses Occupied
setpoints until the Bypass Time elapses. Controller then
returns to previous occupancy state.
(3) Standby Controller in Standby mode and uses Standby setpoints.
If a LonMark compatible occupancy schedule input (nviOccSchedule) is used, the
controller will use the modes and setpoints as shown above. This will allow the
Predator controller to utilize the scheduling properties of other devices on the
LonTalk Network.
The occupancy signal could also come from a time clock, wall switch, or occupancy
sensor physically wired to one of the inputs of the Predator controller. This
occupancy signal could then be shared with other controllers via the Lon Network.
Bypass Mode
If enabled (through stptDialEn) and the Bypass button on the Predator room sensor is
pressed, the controller will be placed in the Bypass mode for the amount of time
specified by the controller’s configuration parameters (default 60 min. – see Table 2).
If the button is subsequently pressed again prior to the expiration of the Bypass time,
the timer will reset to the initial value and resume counting down.
Priorities of Occupancy Control
Occupancy overrides are prioritized as follows (listed from highest to lowest):
• Operator Command – A valid occupied command sent from system operator.
• Bypass Button – Button on Talon room sensor, also utilized by occupants of
room.
• Occupancy Sensor/Wall Switch – Locally connected or signal via the network.
• Occupancy Schedule – Sent from network.