Danfoss VLT Decentral Drive FCD 302 Design Manual

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Danfoss VLT Decentral Drive FCD 302 Design Manual Manual pdf 21 page image

Analog 53S201=OFFAnalog 53S201=ONAnalog 54S202=OFFAnalog 54S202=ONPulse Input 29 Pulse Input 33P1=(Minimum input value, Minimum reference value)Minimum reference value 6-14 Terminal53 Low Ref./Feedb. Value6-14 Terminal 53Low Ref./Feedb.Value6-24 Terminal54 Low Ref./Feedb. Value6-24 Terminal 54Low Ref./Feedb.Value5-52 Term. 29Low Ref./Feedb.Value5-57 Term. 33 LowRef./Feedb. ValueMinimum input value 6-10 Terminal53 Low Voltage[V]6-12 Terminal 53Low Current[mA]6-20 Terminal54 Low Voltage[V]6-22 Terminal 54Low Current[mA]5-50 Term. 29Low Frequency[Hz]5-55 Term. 33 LowFrequency [Hz]P2=(Maximum input value, Maximum reference value)Maximum reference value 6-15 Terminal53 High Ref./Feedb. Value6-15 Terminal 53High Ref./Feedb.Value6-25 Terminal54 High Ref./Feedb. Value6-25 Terminal 54High Ref./Feedb.Value5-53 Term. 29High Ref./Feedb.Value5-58 Term. 33 HighRef./Feedb. ValueMaximum input value 6-11 Terminal53 HighVoltage [V]6-13 Terminal 53High Current[mA]6-21 Terminal54 HighVoltage[V]6-23 Terminal 54High Current[mA]5-51 Term. 29High Frequency[Hz]5-56 Term. 33 HighFrequency [Hz]Table 2.6 Input and Reference Endpoint Values2.3.4 Dead Band Around ZeroIn some cases the reference (in rare cases also thefeedback) should have a dead band around zero (i.e. tomake sure the machine is stopped when the reference is“near zero”).To make the dead band active and to set the amount ofdead band, the following settings must be done:• Either Minimum Reference Value (see Table 2.6 forrelevant parameter) or Maximum Reference Valuemust be zero. In other words; Either P1 or P2must be on the X-axis in the graph below.• And both points defining the scaling graph are inthe same quadrant.The size of the Dead Band is defined by either P1 or P2 asshown in Illustration 2.15.(RPM)Resource outputResourceinputQuadrant 2Quadrant 3Quadrant 1Quadrant 4Terminal Xlow Terminal XhighLow reference/feedbackvalueHigh reference/feedbackvalue-1 1130BA179.10-1500-6 6 (V)1500-10 10P1P20Illustration 2.15 Dead Band(RPM)Resource outputResourceinputQuadrant 2Quadrant 3Quadrant 1Quadrant 4Terminal Xlow Terminal XhighLow reference/feedbackvalueHigh reference/feedbackvalue-1 1130BA180.10-1500-6 6 (V)1500-10 10P1P2 0Illustration 2.16 Reverse Dead BandThus a reference endpoint of P1=(0 V, 0 RPM) will notresult in any dead band, but a reference endpoint of e.g.P1=(1 V, 0 RPM) will result in a -1V to +1V dead band inthis case provided that the end point P2 is placed in eitherQuadrant 1 or Quadrant 4.Product Overview VLT® Decentral Drive FCD 30220 MG04H102 - VLT® is a registered Danfoss trademark22