KNX Technical Reference Manual
ABB i-Bus
®
KNX Yucus
108
12.34.21
Basic stage heating – Control direction of control valve
Options
Normal
Inverse
Note:
Only available when the "Extended settings" parameter under "Heating
control" is set on "Yes".
The mode of the control value can be used to adapt the control value to de-energized
opened (normal) or de-energized closed (inverse) valves.
– N
ormal
: Value 0 means "Valve closed".
–
Inverse
: Value 0 means "Valve open".
12.34.22
Basic stage heating – Hysteresis (x 0.1 °C)
Options
Input from 3 to 255
Note:
This parameter is only available when the "Control value type" parameter
is set either on "2-point 1 Bit, Off/On" or "2-point 1 Byte, 0/100%".
The hysteresis of the two-point controller specifies the fluctuation range of the controller
around the setpoint value. The lower switching point is located at "Setpoint value minus
hysteresis" and the upper point is at "Setpoint value plus hysteresis".
12.34.23
Basic stage heating – Control value difference for sending of heating control
value
Options
2 %
5 %
10 %
Send cyclic only
Note:
This parameter is only available when "Control value type" parameter is
set either on "PI continuous, 0 – 100%" or "Fan coil".
The control values of the 0 - 100% PI continuous controller are not transmitted after every
calculation. Instead, they are transmitting when the calculation results in a value that is
different enough to the previous sent value to make a transmission meaningful. This value
difference can be entered here.
