ABB i-bus
®
KNX
Parameters
FCC/S 1.X.X.1 | 2CDC 508 200 D0211 Rev A 143
7.4.1.2.1.2.7
—
Dependent Parameter
Actuate basic-stage cooling via
Options:
Internal output A (valve)
Internal output B (valve) (Not for FCC/S 1.4.1.1)
Group object
The control value is received via the bus and output directly on the selected output.
On the selection of the
Group object
option, the control value received is output directly again via
the bus without any processing in the device.
7.4.1.2.1.2.8
—
Dependent Parameter
Switch relay output independently of fan speed (including when fan = 0)
This parameter is only visible if the
Internal relay output
has been selected for
Actuate basic-stage
heating via
.
Options:
No
Yes
This parameter is used to set whether switching of the relay output is to be allowed, independently
of whether the fan is running or not. The switching is undertaken via the dependent object
Switch
relay
group object.
NOTICE
Device damage due to large amount of heat
An electric heater can produce a large amount of heat. On the usage of the
Switch relay
group
object it is possible to switch on the electric heater without the fan running. Normally the fan is
used to blow heated air into the room. Without the fan running, there is a risk of overheating,
which may lead to damage to the building or the risk of a fire.
To prevent this situation from arising, suitable measures must be taken, e.g. temperature moni-
toring with mechanical shutdown.
Note
If the device is in the cooling operating mode, even on the activation of this parameter it is not
possible to switch on the relay. This feature prevents simultaneous heating and cooling.
7.4.1.2.1.2.8.1
—
Dependent Parameter
Automatic reset of manual relay overdrive to controller operation after
This parameter is only visible if the
Yes
option has been selected in the
Switch relay output
independently of fan speed (including when fan = 0)
parameter.
Options:
00:00:30…00:05:00…18:12:15
This parameter defines when switching of the relay outside the control is to be reset and controller
operation activated again.
For the time stated here the relay output can be overridden via the group object. Only after this
time has elapsed is the control value specified by the controller applied again for the relay.
A change in the operating mode from heating to cooling will always reset the relay manual override
to controller operation.
