KSB PumpDrive 2 - Example of Open-Loop Control Mode Using External Standard Signal; Open-Loop Control Mode Via Control Panel

8 Commissioning/Shutdown
73 of 212
PumpDrive 2
5 Digital enable input
6 Ground for digital inputs
Example
At analog input 1, a control value of 2000 rpm should be set via a 0 - 10V voltage
signal. 6.66 V then corresponds to a speed of 2000rpm for a 2-pole motor. The
minimum speed set is not undershot. The system start takes place via digital input1.
Table47: Example of open-loop control mode using external standard signal
Parameter Description Possible settings Refers to 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) - Dependent on pump
3-2-2-1 Minimum Motor Speed 500 rpm 3-11 500 rpm
3-2-2-2 Maximum Motor Speed 3000 rpm 3-11 2100 rpm
3-8-1-1 Analog Input Signal
Sensor signal at analog input 1
0…10V - OFF
3-8-1-2 Analog Input 1 Function
Internal operating values cannot be
used as an actual value source.
Setpoint/Control Value
(Auto)
- OFF
3-8-1-3 Analog Input 1 Lower Limit Minimum to maximum
limit of measuring range
- 0,00
3-8-1-4 Analog Input 1 Upper Limit Minimum to maximum
limit of measuring range
- 100,00
1-3-1 System Start / Stop
This function is used to start the
system.
Stop - Stop
NOTE
The System Start/ Stop parameter (1-3-1) must be set to Stop if the system start
takes place via the digital input.
8.7.1.1.2 Open-loop control mode via control panel
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.
The control value for automatic mode can be specified using the control panel. If a
control value is simultaneously specified via the analog input, this value has a higher
priority (ðSection8.2,Page65) .
Example
A 2-pole motor is to run with a speed of 2000 rpm. To this end, a control value of
2000rpm must be set via the control panel using the Control Value (Open-loop
Control) parameter (1-3-3). The system start is activated by the System Start / Stop
(1-3-1) parameter. The frequency inverter then starts as soon as it is set to automatic
or manual mode and the enable is given via DI-EN.