Application

ManualsBrandsSiemens ManualsBuilding automationCompact actuating room automation stations, BACnet MS/TP, AC24 V

Room Segment Functions

Device Mode Determination

Siemens Industry, Inc.

Application Note

A6V11692053

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

2:Control

mode

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)