Viconics VT7000 Series PIR Application Guide - Manual (Page 4)

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• Network Priority and Local Occupancy Routine:
The internal PIR occupancy logic implementation in conjunction with network commands has been conceived to give
the most flexibility while allowing for simple implementation and use.
Network Occupancy Commands: All VT76xx series thermostat have 3 occupancy command levels. This is valid for
all network variations available for the thermostats: LON, BACnet-MS-TP or Wireless.
The 3 levels occupancy state level commands are:
State Occupancy
Command Levels Function
Local occupancy - Releases the thermostat to its own occupancy schemes
- This may be a PIR sensing device, a local schedule or an occupancy routine done by
one of the digital input
- This state command level is used to effectively release the thermostat to use the PIR
functions
Occupied - Leaves the thermostat in occupied mode and cancels any local occupancy functions,
including the PIR occupancy routine
- This state command level is used to force the zone to be always occupied
Unoccupied - Leaves the thermostat in unoccupied mode and cancels any local occupancy
functions, including the PIR occupancy routine
- This state command level is used to force the zone to be always unoccupied.
- The only local possible command is a local override if the thermostat is equipped with
such an option or if the local keypad lockout allows so
Notes for scheduling all models: VT7652A5x 0B, VT7652B5x 00B, VT7656B5x 00B, VT7657B5x00B and
VT7652H5x0B.
• A network occupied or unoccupied command ALWAYS has precedence over the local schedule.
• When the release / local occupancy command is issued, the PIR is only active during Occupied periods as
dictated by the local schedule. During the local schedule unoccupied periods, the PIR is not functional and the
local thermostat will remain in unoccupied mode.
Network Effective Occupancy Feedback Status: All VT76xx series thermostats have 3 occupancy feedback levels.
This is valid for all network variations available for the thermostats: LON, BACnet-MS-TP or Wireless.
Effective Command
State Levels
Function
Override / By-Pass Indicates that the zone is currently local occupied override mode from the
unoccupied state
This function will operate like a normal local override and its time value is as
dictated by the ToccTime configuration parameter setting
Occupied Indicates that the zone is currently occupied
This effective feedback state may be driven by a local occupancy routine like a PIR
sensor or by an occupied network command
Unoccupied Indicates that the zone is currently unoccupied
This effective feedback state may be driven by a local occupancy routine like a PIR
sensor or by an unoccupied network command