Application

Room Functions
Room Operating Mode Determination
32
Siemens Industry, Inc.
Application Note
A6V11692042
Smart Infrastructure – Building Products
2019-04-01
Setting TiCmfBtn to 0 will disable the Comfort button. If the Presence button is
configured, setting TiCmfBtn to 0 only disables the timer; in this case, Comfort
mode remains in effect until the next schedule change unless the Presence button
is pressed again.
Outputs:
ROpModDtr outputs the following:
⚫ ROpMod - The room operating mode is distributed to HVAC, lighting and
shading AFs.
⚫ PrOpMod - The present operating mode can be configured for display on the
room operator unit.
⚫ ManOpCnd - Manual operation condition can be configured / set to Locked
(default = Unlocked). When Locked, manual attempts to adjust the setpoint are
blocked during the operating mode(s) defined in the parameter for Manual
operation lock configuration (ManOpLockCnf). The default for ManOpLockCnf
= Protection & Economy – this means that manual attempts to increase comfort
are blocked during Economy and Protection modes.
Note: Setting ManOpCnd to Locked does not lock out manual changes to
lighting or shading; it only locks out HVAC changes.
⚫ CmfCndTrg / EefCndTrg (see Configuration)
– Comfort condition trigger (CmfCndTrg) specifies transition of room mode
from less comfort to more comfort.
– Energy efficiency condition trigger (EefCndTrg) specifies transition of room
mode away from comfort.
– Central triggering
Manual setpoint adjustment & EefCndTrg
The default configuration will reset a user-entered setpoint adjustment when the
room mode changes. To eliminate this reset, do the following:
- Set Comfort/Pre-Comfort to Economy (CmfPcfToEco) to "None"
- Set Comfort to Pre-Comfort (CmfToPcf) to "None"
These parameters are in the AF, Room operating mode determination
ROpModDtr. They are not BACnet objects, so ABT Site or SSA is required to
access them.