KNX Technical Reference Manual
ABB-i-Bus
®
-KNX Millenium
Description of applications /
objects
KNX Technical Reference Manual | 1473-1-8681
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11.3.18
Basic stage heating - PWM cycle heating (min)
Options:
Setting option between 1 - 60 minutes
In PI PWM, On/off the control value percentage values are converted 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.
Note
This parameter is only available when the "Control value type" parameter is set on
"PI PWM, On/Off“.
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11.3.19
Basic stage heating - Maximum control value (0 - 255)
Options:
Setting option between 0 - 255
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.
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".
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11.3.20
Basic stage heating - Minimum control value for basic load (0 to 255)
Options:
Setting option between 0 - 255
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 heating. Even if the controller calculates the control value zero, a heating
medium will flow through the floor heating 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.
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".
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11.3.21
Control of additional heating stage
Note
Only available when the "Device function" parameter is set on either "Single
device" or "Master device" and the control function parameter is set on either
"Heating with additional stage" or "Heating and cooling with additional stages".
