
ABB i-bus
®
KNX
Planning and application
© 2008 ABB STOTZ-KONTAKT GmbH
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A further adaption of the valve curve is implemented via the limitation of the
valve control value. The valve output does not react in the upper and lower
range due to this limitation. Thus for example, a valve movement with a
minimal heating or cooling requirement can be avoided.
Limitation of the valve control value
A further adaption of the curve can be undertaken in the parameter window
which is separately adjustable for the heating and the cooling valve.
The control value can be adapted to the valve characteristic curve using the
adjustable parameters. The positioning frequency of the valve drive may
also be reduced by this function.
A reduction of the positioning frequency reduces the current requirement for
positioning and increases the service life of the valve. However, a reduced
positioning frequency will also impair the accuracy of the temperature
control.
Valve position
Valve control
value
0 %
100 %
0 %
100 %
Active
valve
opening
range
Minimum controller
output for closed
valve
Maximum controller
output for fully opened
valve