ABB i-bus KNX Product Manual page 28

ABB i-bus KNX
© 2009 Busch-Jaeger Elektro GmbH – A Company of the ABB Group
Commissioning
Proportional range (Xp)
Options: - 0.5 K
- 1.0 K
- 1.5 K
- 2.0 K
- 2.5 K
- 3.0 K
- 3.5 K
- 4.0 K
- 4.5 K
- 5.0 K
- 5.5 K
...
- 10.0 K
The proportional range stands for the P amount of controller. It varies
around the setpoint and can be used to influence control speed with
a PI controller. The smaller the configured value, the faster it reacts to
the control. This value should not be configured too low, in order to avoid
risk of overshoot.
This parameter is only available if "free parameterization" is set as
the control parameter.
Readjust time
Options: - 0 min
-10 min.
- 20 min.
- ...
- 90 min
- ...
- 240 min
The readjust time stands for the I amount of a controller. The integral
amount has the effect of moving the room temperature slowly toward and
finally to the setpoint. Depending on the system type used, the readjust
time has to have different values. In general, the more inactive the overall
system, the larger the readjust time.
This parameter is only available if "free parameterization" is set as
the control parameter.
Minimum control value
Options: - 0 %
- 5%
- 10 %
- 15 %
- 20 %
- 25 %
- 30 %
This parameter is required if the ambient temperature controller with
constant control regulates a continuous actuator or a fan coil.
To prevent switching with control variables that are too small, the parameter
"minimum control value" can be set to a value so that the actuator only
switches on at larger control values.
This parameter is only available if the "Heating" or "Heat and cool" control
functions are set and the "Heating" control type is set to "Continuous" or
"FanCoil".
27