VLT® 7000 Booster
416 Feedback conversion
(FEEDBACK 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 √pressure). 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 f
eedback signal and
the feedback value will be proportional.
If Square root [1] is selected, the frequency converter
translates the feedback
signal to a square root value.
417 Feedback function
(2 FEEDBACK, CALC.)
Value:
Minimum (MINIMUM)
[0]
Maximum (MAXIMUM)
[1]
Sum (SUM)
[2]
Difference (DIFFERENCE)
[3]
Average (AVERAGE)
[4]
Feedback 1 only (FEEDBACK 1 ONLY)
[7]
Feedback 2 only (FEEDBACK 2 ONLY)
[8]
✭Virtual Control Curve (VIRTUAL CTR CURVE)
[9]
Function:
This parameter allows a choice between
different calculation methods whenever two
feedback signals are used.
Description of choice:
If Minimum [0] is selected, the frequency converter will
compare feedback 1 with feedback 2 and regulate
on the basis of the lower feedback value.
Feedback 1 = Sum of parameter 535 Bus feedback 1
and the feedback signal value of terminal 53. Feedback
2 = Sum of parameter 536 Bus feedback 2andthe
feedback signal value of terminal 54.
If Maximum [1] is selected, the frequency converter
will compare feedback 1 withfeedback 2 and regulate
on the basis of the higher feedback value.
If Sum [2] is selected, the frequency converter will total
feedback 1 with feedback 2. Please note that the
remote reference will be added to Setpoint 1.
If Differen ce [3] is selected, the frequency converter
will subtract feedb ack 1 from feedback 2.
If Average [4] is selected, the frequency converter
will calculate the average of feedback 1 and
feedback 2. Please note that the remote reference
will be added to the Setpoint 1.
If Feedback 1 only [7] is selected, terminal 53 is
read as the feedback signal and terminal 54 ignored.
Feedback 1 is compared to Setpoint 1 for drive control.
✭
= factory setting. () = display text [] = value for use in communication via serial communication port
MG.70.A1.02 - VLT is a registered Danfoss trademark
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