Table of Contents
Advertisement
ABB i-bus KNX
© 2010 ABB STOTZ-KONTAKT GmbH
Planning and application
A further adaptation 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.
Valve position
100 %
Active
valve
opening
range
0 %
0 %
Minimum controller
output for closed
valve
Limitation of the valve control value
A further adaptation of the curve can be undertaken in the parameter
window
-
Curve, page 76 that is separately adjustable for the heating and
the cooling valve. The valve control value can be adapted to the control
value using the adjustable parameters there. 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 control
value
100 %
Maximum controller
output for fully opened
valve
140
Advertisement
Table of Contents
