KSB PumpDrive - Page 52

7.1.1.3.1 Open-loop control mode using external standard signal
By default, analog input 1 (terminal P7:9 AnIn1 and 10 AGND P7) is set as the
setpoint source (
3-5-4-1 ). A direct voltage of 0 to 10 V (0 to 100 %) is expected as the
signal. If a current signal, e.g. 4 - 20 mA (0 - 100 %) is to be used, the Anln1 Setting
parameter ( 3-8-2-1 ) has to be set to Current. The setpoint input can be adapted to
the signal by using the parameters 3-8-2-2 to 3-8-2-5 . At a setpoint ≤ 50 %,
PumpDrive always operates at a minimum frequency of 25 Hz ( 3-6-1-2 : 50 %) set in
the factory. If the setting range of the setpoint signal is to apply from the minimum
frequency (
3-6-1-2 ) on, the AnIn 1 Low parameter ( 3-8-2-7 ) has to be set to 50 % and
the corresponding unit.
At analog input 1, a setpoint of 78 % is to be set via a 0 - 10 V voltage signal. 7.8 V
then corresponds to a speed of 39 Hz ( 3-11-4-1 maximum output frequency = 50 Hz)
Table 50: Sample parameterisation of analog input 1
Parameter Description Settings Factory setting
3-2-2-1 Setpoint unit % %
3-2-2-3 Pressure unit % %
3-5-1-2 Minimum setpoint 0 0
3-5-1-3 Maximum setpoint 100 100
3-5-4-1 Setpoint source 1 Analog IN 1 Analog IN 1
3-5-4-2 Setpoint source 2 None Configurable Setpoint
3-5-4-3 Setpoint source 3 None Remote Setpoint
3-8-2-1 AnIn 1 setting Voltage Current
3-8-2-2 Analog IN 1 Low voltage 0 0
3-8-2-3 Analog IN 1 High voltage 10 10
3-8-2-6 Unit of Analog IN 1 % %
3-8-2-7 Low value for Analog IN 1 0 0
3-8-2-8 High value for Analog IN 1 100 100
3-9-1-1 PI mode Disabled Disabled
3-9-1-6 PI Auto Deactivated Activated
Maintain the following sequence for deactivating the process controller:
1.
Change parameter 3-9-1-6 .
2. Change parameter
3-9-1-1 .
⇨ The value displayed for parameter 1-3-1-3 Setpoint is 78 %.
7.1.1.3.2 Open-loop control mode via control panel
Graphical control panel
The speed setpoint can be specified using the control panel. For this purpose, the
Setpoint Source 2 parameter
(3-5-4-2) must be set to Configurable Setpoint (factory
setting).
The setpoint is specified using the Configurable Setpoint parameter (3-5-2-1) . The
setpoint unit is set using the Setpoint Unit (3-2-2-1) and Max Setpoint (3-5-1-3)
parameters (⇨ Section 7.1.1.2 Page 49) .
A 2-pole motor is to run with a speed of 2500 rpm. This corresponds to a frequency
of 41.67 Hz. A setpoint of 83.33 % must be set at the control panel for this purpose.
(for 3-11-4-1 maximum output frequency = 50 Hz)
n
n
-
n
(
-
)
= [%]
2500
1
3000
1
- 1500
1
(
100% - 50%
)
= 83,33%
Target
Target
Target
Target
Max.
Max.
Min.
Min.
Min.
Min.
Min.
Fig. 26: Sample calculation
Table 51: Sample parameterisation of open-loop control mode via control panel
Parameter Description Settings Factory setting
3-2-2-1 Setpoint unit % %
3-2-2-3 Pressure unit % %
Example
Example
7 Commissioning/shutdown
52 of 162
PumpDrive