Viconics VT7000 Series PIR Application Guide - Manual (Page 2)

2
Configuration Parameters Associated with the Viconics PIR Accessory Covers
The following configuration parameter is specifically provided as standard on all VT76xx series thermostats. It is
associated with the advanced occupancy functionality introduced with the addition of a PIR cover. This parameter will
allow the installer to set the thermostat occupancy functions exactly as required by the application.
Its functionality only becomes active if a PIR accessory cover is connected.
Configuration Parameter Description of Configuration parameter
Unoccupied Time:
Default 0.5 hours
This parameter sets the time delay between the moment where the PIR cover
detected the last movement in the area and the time which the thermostat
Unoccupied mode and setpoints become active.
Adjustable from 0.5 to 24 hours in 0.5hr increments
If no movement are detected in the area and the current mode is occupied.
This parameter will then set the time delay between the moment where the
thermostat toggles to unoccupied due to movement detection and the time
which the thermostat unoccupied mode and setpoints become active after the
timer expires.
The factory value or 0.5 hours:
Adjustable from 0.5 to 24 hours in .5hr increments
Important Notes and Things to Know
When reviewing the following document and planning an application using a Viconics VT76xx thermostat with PIR
functionality, please remember the important following notes:
• VT76xx PIR implementations use a 2 level occupancy scheme: Occupied And Unoccupied. The application layer
does NOT support stand-By mode.
• Configuration of PIR Function: PIR application related configuration parameter ( Unoccupied Time ) is displayed in
the configuration menu or available as an object in the network object list. The advanced occupancy functionality of a
PIR attached to a VT76xx thermostat is only enabled if A Viconics VI-PIR cover is installed on the thermostat.
• PIR Cover Warm-Up Period: When VI-PIR accessory cover is used and a thermostat is powered up; there will be a
1 minute warm up period before any local movements can being detected and acknowledged by the PIR sensing
device. The local status LEDs for the VI-PIR cover will also not be active during that one minute period.
Only when that 1 minute period has elapsed after initial power up of the thermostat will the PIR functionality and local
movement status LEDs be activated.