Viconics VT7000 Series Application Guide - Manual (Page 4)

4 • Unoccupied Timer Disable: In certain application cases, it may be desired to never let the local area enter the
unoccupied mode and always stay at the stand-by occupancy level when no activity is present.
This allows for advanced flexibility when used in conjunction with a network or in cases when areas always need to
be on stand-by status ready to respond to demand at any point in time.
Unoccupied timer set 6 Hours and stand-by timer set to 2 hours
When the local PIR occupancy routine is running at the thermostat, the zone will drift into unoccupied mode when the
unoccupied timer is set above its factory default value of 0.0 hours
Unoccupied timer set 0 Hours and stand-by timer set to 2 hours
When the local PIR occupancy routine is running at the thermostat, the zone will never drift into unoccupied mode
when the unoccupied timer is set to its factory default value of 0.0 hours
• 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 VT700 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
Stand-by is never a commandable level. It only exists as a feedback status level.
Unoccupied Time
= 6 Hours
Stand-By Time
= 2 Hours
Occupied
Stand-By
Unoccupîed
Time
Stand-By Time Elapsed
= Stand-By Mode Unoccupied Time Elapsed
= Unoccupied Mode
Last Movement Detected
by PIR Activity
Time
Stand-By Time Elapsed
= Stand-By Mode
Stand-By Time
= 2 Hours
Last Movement Detected
by PIR Activity
Unoccupied Time
= 6 Hours
Unoccupied Time
= 0 Hours
Stand-By Time
= 2 Hours
Occupied
Stand-By
Unoccupîed
Time
Stand-By Time Elapsed
= Stand-By Mode Last Movement Detected
by PIR Activity
Time
Stand-By Time Elapsed
= Stand-By Mode
Stand-By Time
= 2 Hours
Last Movement Detected
by PIR Activity
Unoccupied Time
= 0 Hours