VLT
®
2800 Series
Programming
Function:
The user sets the voltage by which the level for
resistor braking is reduced. It is only active when
resistor in parameter 400 is selected.
Description of choice:
The greater the reduction value, the faster the
reaction to a generator overload. Should only
be used if there are problems with overvoltage
in the intermediate circuit.
461 Feedback conversion
(FEEDBAC CONV.)
Value:
✭
Linear (LINEAR)
[0]
Square root (SQUARE ROOT)
[1]
Function:
In this parameter, a function is selected which converts
a connected feedback signal from the process to a
feedback value that equals the square root of the
connected signal. This is used, e.g. where regulation
of a flow (volume) is required on the basis of pressure
as feedback signal (flow = constant x
).
This conversion makes it possible to set the reference
in such a way that there is a linear connection
between the reference and the flow required.
Description of choice:
If
Linear
[0] is selected, the feedback signal and the
feedback value will be proportional. If
Square root
[1] is selected, the frequency converter translates the
feedback signal to a squared feedback value.
✭
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.28.E9.02 - VLT is a registered Danfoss trademark
107
