Scaling of References and FeedbackReferences and feedback are scaled from analog and pulse inputs in the same way. The only differenceis that a reference above or below the specified minimum and maximum ìendpointsî (P1 and P2 in thegraph below) are clamped whereas a feedback above or below is not.The endpoints P1 and P2 are defined by the following parameters depending on which analog or pulseinput is usedAnalog 53S201=OFFAnalog 53S201=ONAnalog 54S202=OFFAnalog 54S202=ONPulse Input 29 Pulse Input 33P1 = (Minimum input value, Minimum reference value)Minimum reference value Par. 6-14 Par. 6-14 Par. 6-24 Par. 6-24 Par. 5-52 Par. 5-57Minimum input value Par. 6-10 [V] Par. 6-12 [mA] Par. 6-20 [V] Par. 6-22 [mA] Par. 5-50 [Hz] Par. 5-55 [Hz]P2 = (Maximum input value, Maximum reference value)Maximum reference value Par. 6-15 Par. 6-15 Par. 6-25 Par. 6-25 Par. 5-53 Par. 5-58Maximum input value Par. 6-11 [V] Par. 6-13 [mA] Par. 6-21 [V] Par. 6-23 [mA] Par. 5-51 [Hz] Par. 5-56 [Hz]Dead Band Around ZeroIn 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 ìnear zeroî). To make the dead bandactive and to set the amount of dead band, the following settings must be done:ï Either Minimum Reference Value (see table above for relevant parameter) or Maximum ReferenceValue must be zero. In other words; Either P1 or P2 must be on the X-axis in the graph below.ï 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.FC 300 Design GuideIntroduction to FC 30024 MG.33.B7.02 - VLT is a registered Danfoss trademark
