ABB i-bus KNX Yucus YUB/U1.0.1 Series Technical Reference Manual page 120

KNX Technical Reference Manual
ABB i-Bus ® KNX Yucus
12.34.51 Basic stage cooling – PWM cycle cooling (min)
Options
Note: This parameter is only available when the "Control value type" parameter
is set on "PI PWM, On/Off".
In PI PWM, On/off the control value percentage values are convert into a pulse-interval
signal. This means that a selected PWM cycle will be divided into an on-phase and an
off-phase based on the control value. Accordingly, a control value output of 33% in a
PWM cycle of 15 min. results in an "On-phase" of five minutes and an "Off-phase" of 10
min. The time for a PWM cycle can be specified here.
12.34.52 Basic stage cooling – Maximum control value
Options
Note: This parameter is only available when "Control value type" parameter is
set either on "PI continuous, 0 – 100%", "PI PWM, On/Off" or "Fan coil".
The maximum control value of the PI controller defines the maximum value outputted by
the controller. If a maximum value under 255 is chosen, the value will not be exceeded,
even if the controller calculates a higher control value.
12.34.53 Basic stage cooling – Minimum control value for basic load
Options
Note: This parameter is only available when "Control value type" parameter is
set either on "PI continuous, 0 – 100%", "PI PWM, On/Off" or "Fan coil".
The minimum control value of the PI controller defines the minimum value output by the
controller. If a minimum value greater than zero is chosen, the controller will not output a
lower value, even if it calculates a value that is lower. This parameter can be used to set
a basic load, e.g. for operating floor cooling. Even if the controller calculates the control
value zero, a cooling medium will flow through the floor cooling system to prevent the
floor from cooling down. Under "Settings of basic load", it is also possible to define
whether this basic load will be permanently active or whether it will be switched by the
"Basic load" object.
Input from 1 to 60
Input from 0 to 255
Input from 0 to 255
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