KSB PumpDrive 2 - Control Direction; Setting the Setpoint or Control Value; Setting the Actual Value; Setting the Process Controller

8 Commissioning/Shutdown
75 of 212
PumpDrive 2
Table49: Selecting the type of control
Parameter Description Possible settings Factory setting
3-6-1 Type of control
Selecting the control method. The
controller is deactivated when OFF (Open-
loop Control) is selected.
▪ OFF (Open-loop Control)
▪ Discharge Pressure
▪ Suction Pressure
▪ Differential Pressure
▪ Differential Pressure
(Sensorless)
▪ Flow Rate
▪ Flow Rate (Sensorless)
▪ Temperature (Cooling)
▪ Temperature (Heating)
▪ Suction-side Level
▪ Discharge-side Level
Dependent on pump
The response of the frequency inverter to a positive or negative control deviation is
defined by the controller's control direction. For a normal control direction and
positive control deviation, the speed is increased; for an inverted control direction
and positive control deviation, the speed is decreased. The control direction of the
controller is implicitly defined by the type of control selected.
Table50: Control direction
Type of control Control direction Comment
Discharge pressure,
differential pressure,
differential pressure
(sensorless),
flow rate,
temperature (heating),
discharge-side level
Normal Increase in speed for
positive control deviation
Suction pressure,
temperature (cooling),
suction-side level
Inverted Decrease in speed for
positive control deviation
Setting the setpoint or control value
Parameter (3-6-2) is used to define the source of the setpoint for an activated process
controller or the source of the control value for a deactivated process controller.
When Local is selected, an analog input or the control panel may be used as the
source. When Field Bus is selected, the source of the field bus device is used.
(ðSection8.2,Page65)
Changes in the setpoint are ramped along the setpoint ramp
(ðSection8.8.5,Page109) .
Setting the actual value
Parameter (3-6-3) is used to define the source of the actual value. When Local is
selected, an analog input or the control panel may be used as the source. When Field
Bus is selected, the source of the field bus device is used. (ðSection8.10.2,Page118)
Setting the process controller
NOTE
The parameter values and value ranges/units entered are mutually dependent. This
is why the first step in parameterising the frequency inverter is always to specify the
applicable value range and units (refer to parameter 3-11). If the value range or
unit is subsequently changed, all dependent parameters must be checked for
correctness again.