ABB i-bus
®
KNX
Parameters
FCC/S 1.X.X.1 | 2CDC 508 200 D0211 Rev A 206
7.5.1.9.1
Additional-stage cooling control value type
Options:
2-point 1 bit (On/Off)
2-point 1 byte (0/100 %)
PI continuous (0…100 %)
PI PWM (On/Off)
PI continuous (0…100 %) for Fan Coil
This parameter is used to specify the control and control value type for the additional-stage heat-
ing.
The standard value for the parameter is dependent on the selection in the
Additional-stage cooling
and
Actuate additional-stage cooling via
parameters (
Application parameters
parameter window).
On the selection of one of the physical device outputs for the actuation of the additional-stage
heating, the controller has a fixed pre-configuration that cannot be changed. The pre-configured
controller type is dependent here on the option selected in the
Additional-stage cooling
parameter.
The only exception is on the selection of
Free configuration
. In this situation, everything can be se-
lected and set freely.
The following table shows the dependencies:
Option selected:
Additional-stage cooling
Pre-configured controller type:
Additional-stage cooling control
value type
Controller type can be changed
Convector (e.g. radiator)
PI continuous (0…100 %)
No
Area (e.g. cooling ceiling)
PI continuous (0…100 %)
No
Electric heater (in room)
2-point 1 bit (On/Off)
No
Free configuration
PI continuous (0…100 %)
Yes
Fan coil unit: electric heater (in fan
coil unit)
2-point 1 bit (On/Off)
No
Fan coil unit: Water heating coil
PI continuous (0…100 %) for Fan
Coil
No