Select how the VFD is to be controlled:
•
CUE (GENIbus). See the installation and operating instructions
for Dedicated Controls.
•
Analog output (0-10 V). See section about analog outputs.
"Min. frequency" is set to 30 Hz as default.
"Max. frequency" is set to 50 Hz as default.
These parameters are the limits for the fixed frequency. This means
that the frequency cannot be set higher than 50 Hz or lower than 30
Hz.
Path:
Settings > Advanced functions > Variable-frequency drives >
VFD settings, pump 1
4-2-10-1_VFD_FIXED_REGULA
TION_138
Fixed frequency
Related information
8.2.9.2 Linear control
"Linear control" is used when the pump speed has to be adjusted
according to the pit inflow. When the inflow allows the pump to run
at "Economy frequency", the pump runs at this frequency and
adjusts the frequency if the inflow changes.
Select economy parameters:
•
Economy level
•
Max. economy level
•
Economy frequency.
At "Economy level", the pump runs at "Economy frequency" and
ramps up the frequency if the inflow increases.
At "Max. economy level", the pump runs at maximum frequency.
When the level is below the "Max. economy level", the
pump ramps down until the "Economy level" is reached. See the
figure below.
1
2
3
4
5
6
7
1
2
TM043327
Pit levels
Pos.
Description
1
High level
2
Start level 2
3
Max. economy level
4
Economy level
5
Start level 1
6
Stop level
7
Dry-running level
Pump operation:
1-2: The pump is operating in the control mode selected.
2-3: The pump is running at maximum speed.
3-4: The pump is running with linear control.
4-5: The pump is running with linear control.
5-6: The pump is running at "Economy frequency" (buffer range
before stop).
6-7: The pump has been stopped.
The parameters can be changed via the following:
•
PC Tool WW Controls
•
SCADA system
•
CU 362 operating panel.
If flush settings have to be made, see section about flush settings.
VFD interface:
Select how the VFD is to be controlled:
•
CUE (GENIbus). See the installation and operating instructions
for Dedicated Controls.
•
Analog output (0-10 V). See section about analog outputs.
"Min. frequency" is set to 30 Hz as default.
"Max. frequency" is set to 50 Hz as default.
These parameters are the limits for the fixed frequency. This means
that the frequency cannot be set higher than 50 Hz or lower than 30
Hz.
Path:
Settings > Advanced functions > Variable-frequency drives >
VFD settings, pump 1
4-2-10-1_VFD_LINEAR_REGULA
TION_138
Linear control
40
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