ABB i-bus
®
KNX
Group objects
FCC/S 1.X.X.1 | 2CDC 508 200 D0211 Rev A 340
No.
Function
Group object name Data Type
Flag
80
Operating mode normal (mas-
ter)
Channel – Controller 1 byte
DPT 20.102
C, W, T, U
This group object is always visible in controller mode.
This group object is hidden in actuator mode.
The group object receives the operating mode to be set as a 1-byte value.
Telegram value:
•
1: Comfort
•
2: Standby
•
3: Economy
•
4: Frost/heat protection
The operating mode switches between different operating states of the room:
•
Comfort: Room occupied. The setpoint temperature is set to a default value perceived as pleasant by
most users.
•
Standby: Room is briefly/recently vacant. The setpoint temperature is decreased (heating) or increased
(cooling)
•
Economy: The room is us unused for an extended period (e.g. overnight), and the temperature is
markedly decreased (heating) or increased (cooling).
•
Frost/heat protection: The room or building is unused for and extended period (e.g. school during vaca-
tion). The setpoint temperatures are adjusted to the minimum (heating – frost protection) or maximum
(cooling – heat protection) values that are still acceptable without damaging the installation.
Switchover between the operating modes usually takes place via a central schedule or via Intelligent Building
Control.
Note
The group objects and states
Override mode
,
Fill level alarm
,
Dew point alarm
,
Window contact
,
Request On/Off (Master)
,
Presence detector
and
Operating mode
(listed in decreasing priority) deter-
mine the controller's setpoint in addition to manual setpoint adjustment and basic setpoint adaptation.
Note
If a slave is used:
To indicate the operating mode on a slave, this group object must be connected to the slave's group
object
Operating mode (slave)
.
