Danfoss VLT AutomationDrive FC 300 Design Manual page 28

FC 300 Design Guide
In some cases the reference (in rare cases also the feedback) should have a Dead Band around zero
(i.e. to make sure the machine is stopped when the reference is "near zero"). To make the dead band
active and to set the amount of dead band, the following settings must be done:
Either Minimum Reference Value (see table above for relevant parameter) or Maximum Reference Value
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must be zero. In other words; Either P1 or P2 must be on the X-axis in the graph below.
And both points defining the scaling graph are in the same quadrant.
•
The size of the Dead Band is defined by either P1 or P2 as shown in the graph below.
Thus a reference endpoint of P1 = (0 V, 0 RPM) will not result in any dead band.
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Introduction to FC 300
MG.33.B4.02 - VLT is a registered Danfoss trademark