ABB i-bus KNX Yucus YUB/U1.0.1 Series Technical Reference Manual page 122

KNX Technical Reference Manual
ABB i-Bus ® KNX Yucus
available when "Control value type" parameter is set either on "PI continuous, 0 – 100%",
"PI PWM, On/Off" or "Fan coil".
Two cooling types (area or fan coil) with preset parameters are available to the user.
If the required cooling type is not available, individual parameters can be specified in free
configuration.
12.34.56 Control of cooling additional stage – P-component (x 0.1 °C)
Options
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
"Cooling with additional stage" or "Heating and cooling with additional stages", only
available when "Control value type" parameter is set either on "PI continuous, 0 – 100%",
"PI PWM, On/Off" or "Fan coil". In addition, the "Cooling type" parameter must be set on
"Free configuration".
The P-component refers to the proportional band of a control. It fluctuates around the
setpoint value and can be used to influence control speed with a PI controller. The smaller
the setpoint, the faster it reacts to the control. However, to avoid the risk of an overshoot,
this value should not be set too low. A P-component from 0.1 to 25.5 K can be set.
12.34.57 Control of cooling additional stage – I-component (min)
Options
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
"Cooling with additional stage" or "Heating and cooling with additional stages" only
available when "Control value type" parameter is set either on "PI continuous, 0 – 100%",
"PI PWM, On/Off" or "Fan coil". In addition, the "Cooling type" parameter must be set on
"Free configuration".
The I-component refers to the reset time of a control. The integral component has the
effect of moving the room temperature slowly toward, and ultimately reaching, the setpoint
value. Depending on the type of system used, the reset time has to have different values.
In general, the more inactive the overall system, the greater the reset time.
Input from 10 to 100
Input from 0 to 255
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