ABB i-bus KNX Product Manual page 69

ABB i-bus KNX
© 2009 Busch-Jaeger Elektro GmbH – A Company of the ABB Group
Commissioning
No. Function
7 Operating mode
switchover
This data item forms the 1-bit object of KNX (DPT_HVAC_MODE) for switching operating
modes. All operating modes of the above 1-bit objects can be set with the 1-byte object.
The data item can be received and sent. The selection of whether switching is via three 1-bit
objects or two 1-byte objects (OMN / OMO) is defined by application parameters (see above).
This 1-byte communication object can be used to switch between comfort, standby, night
and frost/heat protection modes. The object evaluates received telegrams as "normal".
This means, for example, if a comfort telegram is received, the room thermostat switches
to comfort mode. If a night telegram is received, the room thermostat switches to night mode.
This object is controlled, for example, by time switches.
The following provisions apply for the object:
0: Auto
1: Comfort
2: Standby
3: Night
4: Frost/Heat Protection
5 – 255: not permitted
8 Operating mode
switchover required
This data item corresponds to the operating mode switching 1 byte function, where
it overrides the OMN (Operation Mode Normal vs. Operation Mode Overwrite).
This 1-byte communication object can temporarily "overwrite" the previous 1-byte mode
object. This means, for example, if a frost/heat protection telegram is received, the ambient
temperature controller switches to frost or heat protection mode. If the frost or heat protection
is reset by the receipt of another telegram, the ambient temperature controller enables
the operating mode on the "normal" 1-byte operating mode object. As a result, it is capable
of noting operating modes. This object is controlled, for example, by binary inputs that record
information from window contacts.
The following provisions apply for the object:
0 = Auto
1 = Comfort
2 = Standby
3 = Night
4 = Freezing/Heat Protection
5 – 255 = not permitted
Object name Data type
Control 1 byte
DPT_HVAC
Mode
Control 1 byte
DPT_HVAC
Mode
Flags
K, Ü, S,
L
K, Ü, L
68