Viconics VT7000 Series Application Guide User Manual

Page 5

Network Occupancy Feedback Status: All VT700 series thermostats have 4 occupancy feedback levels. This is
valid for all network variations available for the thermostats: LON, BACnet-MS-TP or Wireless.

State Occupancy
Command 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

Stand-By

Indicates that the zone is currently in stand-by mode

This effective feedback state can only be driven by a local PIR occupancy routine

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

1) BACnet Object Used for Occupancy Commands and Feedback

Object Name

Object ID

BACnet Index

Text

1 Occupied
2 Unoccupied

Occupancy
Command

MV xx

Local Occupancy ( PIR or Internal Schedule )

1 Occupied
2 Unoccupied
3 Temporary

Occupied

Effective
Occupancy

MV xx

4 Stand-By

2) LON Snivets Used for Occupancy Commands and Feedback

Snivet Name

Notes and Indexes

Default Null Value: OC_NUL = 0xFF Releases the thermostat to its internal

Occupancy function: Internal scheduling, PIR, etc….

Valid Range:

0 = OC_OCCUPIED

1 = OC_UNOCCUPIED

2 = OC_BYPASS – Not Used

3 = OC_STANDY – Not Used

network input
SNVT_occupancy
nviOccCmd

0xFF = OC_NUL (Release to PIR or internal schedule)

This output network variable is used to indicate the actual occupancy mode of the

unit. This information is typically reported to a supervisory controller or provided
to another Space Comfort Controller to coordinate the operation of multiple units

Valid Range:

0 = OC_OCCUPIED

1 = OC_UNOCCUPIED

2 = OC_BYPASS

network output
SNVT_occupancy
nvoEffectOccup

3 = OC_STANDBY

Note 1: OC_BYPASS can be initiated by local override. NvoEffectOccup will only be
in OC_BYPASS for the duration of the ToccTime (nciGenOpts), until reinitiated by
either a transition of the local input or an update to nviOccManCmd.