VLT
®
2800 Series
Installation
441 = Integration t ime (I-time) 3-10 sec.
(experienced va lue)
442 = Differentiation time ( D-time) 0-10
sec. (experienced value)
205=Max. referenceistobesetequalto
parameter 415 (example: 10 bar)
215 = Preset reference 1 . Set the preset reference
to the wanted min. reference value (example: 5 bar)
(Parameter 205 and 215 are shown in the process
unit chosen in parameter 416).
The value in brackets [ ] are data values
corresponding to the wanted funct ion. Example:
Parameter 308 Feedback signal = [2]
If the motor is supposed to always run at a
minimum speed, a such can be selected in
parameter 204 = output frequency low limit. (For
pump works it is typically 15-20 Hz) .
With the above connections and settings all normal
pump and fan applications will work properly. In
certain ca ses it might be necessary to optimize
the PID-controllerr (parameter 440, 441 and 442)
beyond the mentioned experienced values.
MG.28.E9.02 - VLT is a registered Danfoss trademark
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