TM047306
Example of configuring a user-defined function
Related information
8.2.8.1 User-defined function
11. Logical operators
8.2.9 Variable-frequency drives (VFD)
This display is used to set the variable-frequency drives, hereafter
named VFD. The VFD has to be selected for each pump in the
"Modules installed" submenu before the VFD settings can be made.
The desired control mode must be selected. Each of the following
control modes is described in the following sections:
• Fixed frequency
• Linear control
• Minimum control
• PID control.
All control modes support flush settings. Flush settings must be
selected and enabled manually:
• Reverse start
• Start flushing
• Run flushing
• Stop flushing.
For further information about flush settings, see section about flush
settings.
The VFD to be set must be selected. Only pumps controlled by a
VFD are shown in this display.
The "Modules installed" submenu can be accessed from this
display.
Path:
Settings > Advanced functions > Variable-frequency drives
4-2-10_VFD_140
Variable-frequency drives
Related information
8.2.12 PID control
8.2.9.1 Fixed frequency
"Fixed frequency" is used when a constant frequency lower than 50
Hz is required. The desired frequency must be entered in the line
"Fixed frequency".
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.
If the function "Max. speed if other is running" is enabled, the
pump ramps up until "Max. frequency" is reached when another
pump is running.
VFD interface:
39
English (GB)
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