ABB i-bus KNX Product Manual page 216

®
ABB i-bus KNX
Group objects
No.
52
This group object is enabled if the controller was parametrized for heating. For this purpose, Deactivated must not be selected
for the parameter Basic-stage heating in the Application parameters parameter window.
This group object is hidden in actuator mode.
The device uses the group object to indicate whether it is currently active in the type of operation, i.e. whether the control
value is greater than 0.
Telegram value:
•
0: Heating control value = 0
•
1: Heating control value > 0
53
This group object is enabled if the controller was parametrized for cooling. For this purpose, Deactivated must not be selected
for the parameter Basic-stage cooling in the Application parameters parameter window.
This group object is hidden in actuator mode.
The device uses the group object to indicate whether it is currently active in the type of operation, i.e. whether the control
value is greater than 0.
Telegram value:
•
0: Cooling control value = 0
•
1: Cooling control value > 0
54
The group object is enabled if the parameter Minimum control value for basic load > 0 is set to Activate via group object in the
Temperature controller parameter window.
This group object is hidden in actuator mode.
Sending the value 1 on this group objects activates the basic load.
The basic load is a minimum control value that must not be fallen below. The basic load value can be defined for each heating
and cooling stage, but only for control types for which the control value is output with 0...100 %.
The basic load is always activated jointly for all stages, but it is active only for the active heating or cooling type of operation
in each case.
The control value can decrease to 0 % again when the basic load is inactive.
One sample application for the basic load is floor heating, for which a certain control value must not be fallen below to protect
the installation.
Telegram value:
•
0: Basic load inactive
•
1: Basic load active
55
This group object is enabled if the actuator was parametrized for both heating and cooling. For this purpose, Deactivated must
not be selected for the parameters Basic-stage heating and Basic-stage cooling in the Application parameters parameter
window.
This group object changes between heating and cooling types of operation.
Changing between heating and cooling is possible only via this group object in actuator mode.
The respective control value is considered active and is sent to the selected output depending on this group object value.
Incoming group objects on the inactive control value are not processed during this time.
Telegram value:
•
0: Cooling
•
1: Heating
214 2CDC508220D0211 Rev. A | VC/S 4.x.1
Object function
Status Heating
Status Cooling
Activate minimum control value (basic
load)
Heating/cooling changeover
Name
Channel A – Controller
Channel A – Controller
Channel A – Controller
Channel A – Actuator
Data type Flags
1 bit C, R, T
DPT 1.001
1 bit C, R, T
DPT 1.001
1 bit C, W
DPT 1.003
1 bit C, W, T, U
DPT 1.100