User Manual

Table Of Contents
Control concept
Desigo room automation
5
CM110664en_07 105 | 351
The HVAC control applications in the room dynamically enable and disable the setpoints to achieve the
desired combination of energy-saving Economy and demand-based Comfort operating mode.
Command priorities
An HVAC control application simultaneously achieves several goals. Functions with different objects may
conflict when they are implemented. In this case, the command priority determines which command value
has priority in the priority array of the BACnet objects.
HVAC control applications in a room are programmed to accept commands at many different levels,
including operating mode variable level. As a result, HVAC control applications control the controlled output
objects at a priority commensurate with the active priority of the operating mode variable. The following
figure shows how commands and priorities are passed in the application.
The BACnet objects in the system support 16 priority levels. The HVAC control applications apply these
levels as follows:
t
06
:
00
18
:
00
00
:
00
24
:
00
SpC
SpH
Eco
Cmf
Eco
RClmOpMod
C
12345678...141516 13
12345678...141516 13
12345678...141516 13
Fcu01
HclHw01 CclChw01
FanSpd:MO
FcuDevMod01
FcuPltMod01
CclDevModFanDevMod HclDevMod
Close
2Pos
Mod
Close
Mod
Mod
PltOpMod
RClmOpMod
Off
Fire Detector
Off
Eco
Cmf
Close
2Pos
Mod
FanMultiSpd01
HclVlvPos:AO CclVlvPos:AO
TXM1.6R TXM1.8U TXM1.8U
Eco,Cmf
12345678...141516 13
EmgProtMan / Auto
Man / Auto
EmgProtMan / Auto