Application

Room Segment Functions
Device Mode Determination
51
Siemens Industry, Inc.
Application Note
A6V11692042
Smart Infrastructure – Building Products
2019-04-01
Room Segment Functions
Device Mode Determination
Depending on the plant operating mode, each device is assigned a device
operating mode (DevOpMod). Examples include control, fully open, fully closed,
and off.
Dual Duct VAV Supply Air Damper Device Mode
The Supply VAV air damper device mode (VavSuDevMod), common for both
dual duct supply dampers, is a multistate value that supports the following states
for plant operating modes:
⚫ Off
⚫ Control mode (modulation) > Protection, Economy, Pre-Comfort, Comfort,
Warm-up, Cool down
⚫ Max.air vol.flow > Rapid Ventilation, Purge, Room low temperature protection
⚫ Min.air vol.flow
⚫ Smk.air vol.flow setp. → smoke air volume flow setpoint
Device
mode
Duct 1
Duct 2
1:Off
Setpoint is zero
Setpoint is zero
2:Control
mode
Follows demand
Follows demand
3:Max.air
vol.flow
Select from h/c maximum according
to VavSuChovrCnd1:
- Neither (Vent max)
- Cooling (Cooling max)
- Heating (Heating max)
- Neutral (max of Cooling max and Heat-
ing max)
Select from h/c maximum according
to VavSuChovrCnd2:
- Neither (Vent max)
- Cooling (Cooling max)
- Heating (Heating max)
- Neutral (max of Cooling max and Heat-
ing max)
4:Min.air
vol.flow
Select from h/c minimum according to
VavSuChovrCnd1:
- Neither (Vent min)
- Cooling (Cooling min)
- Heating (Heating min)
- Neutral (max of Cooling min and Heat-
ing min)
Select from h/c minimum according to
VavSuChovrCnd2:
- Neither (Vent min)
- Cooling (Cooling min)
- Heating (Heating min)
- Neutral (max of Cooling min and Heat-
ing min)
5:Smoke
Setpoint is smoke value
Setpoint is smoke value