PowerFlex 750-Series AC Drives User Manual

3-30 Programming and ParametersFileGroupFEEDBACK & I/OFeedbackNameNo. Description133 Aux Vel FdbkFltrAuxiliary Velocity Feedback FilterAdjusts a filter setting that is applied to the P134 [Aux Vel Feedback] that isselected by P132 [Aux Vel Fdbk Sel]. The purpose of this filter is to reduce thelevel of noise present in the feedback signal. Filter adjustment and operation issimilar to P126 [Pri Vel FdbkFltr].134 Aux Vel FeedbackAuxiliary Velocity FeedbackOutput of the Auxiliary Velocity Feedback Delay filter, in units of Hz or RPM,depending on the value of P300 [Speed Units]. Adjustment of the delay filter ismade using P126 [Pri Vel FdbkFltr]. Typically used as a speed reference source.This selection is available in P545 [Spd Ref A Sel] and P550 [Spd Ref B Sel].Default:Options:Units:Default:Min/Max:3 = “50R/S Noise”0 = “190R/S Noise”1 = “160R/S Noise”2 = “100R/S Noise”3 = “50R/S Noise”4 = “25R/S Noise”5 = “12R/S Noise”6 = “6R/S Noise”7 = “3R/S Noise”135 Mtr Psn Fdbk SelMotor Position Feedback SelectSelects the source of P847 [Psn Fdbk]. Possible selections include: Port 0 –Simulator Fdbk, and any Port that contains a feedback module (for example,Encoder). Open Loop Feedback is not available as a Position feedback source.The default setting is P138 [Simulator Fdbk]. This is a test mode where positionfeedback is calculated based on P690 [Limited Trq Ref] and P76 [Total Inertia].When position control is used, a valid position feedback source must be selected.Default:Min/Max:1380 / 159999136 755 Load Psn FdbkSelDefault: 137Load Position Feedback SelectMin/Max: 0 / 159999Selects a position load feedback source for the position control. The position loadfeedback P847 [Psn Fdbk] indicates the selected position feedback value. Thevalue forms the primary feedback for the position regulator integration channel.137 Open Loop FdbkOpen Loop FeedbackAn estimated motor feedback source that is available to any of the VelocityFeedback Selection parameters – P125 [Pri Vel Fdbk Sel], P128 [Alt Vel FdbkSel], and P132 [Aux Vel Fdbk Sel]. Open Loop Feedback is not available as aPosition feedback source.The Open Loop Feedback’s parameter value has units of encoder counts asestablished by P141 [Virtual Enc EPR]. Open Loop feedback is estimated basedon P1 [Output Frequency] and P5 [Torque Cur Fdbk], adjusted using P621 [SlipRPM @ FLA].138 Simulator FdbkSimulator FeedbackSimulator Feedback is a calculated motor feedback source. It can be used whenoperating in any of the Flux Vector control modes that are selected in P35 [MotorCtrl Mode]. Simulator Feedback is available to any of the Velocity FeedbackSelection parameters: P125 [Pri Vel Fdbk Sel], P128 [Alt Vel Fdbk Sel], and P132[Aux Vel Fdbk Sel]. Simulator Feedback is also available as a Position feedbacksource as selected by P135 [Mtr Psn Fdbk Sel].The Simulator Feedback’s parameter value has units of encoder counts, asestablished by P141 [Virtual Enc EPR]. Simulator velocity feedback is calculatedbased on P690 [Limited Trq Ref] and P76 [Total Inertia]. This selection is usefulfor drive operational checkout and test when motor movement is undesired. Insimulation mode, gating of the power inverter section of the drive is disabled.ValuesDefault:Options:Default:Options:139 755 Delayed Spd RefUnits:Delayed Speed ReferenceOne sample period delayed output of P594 [Ramped Spd Ref]. Used in someapplications to synchronize the speed reference value when controlling multipledrives. In these applications, the drive that supplies the master speed referencewould use the [Delayed Spd Ref] value. Setting P635 [Spd Options Ctrl] Bit 8“Delayed Ref” will select the delayed reference in the master drive. P594[Ramped Spd Ref] would then be transmitted to the slave drives over acommunication link.Default:Min/Max:HzRPM0.00–/+P27 [Motor NP Hertz] x 8–/+P28 [Motor NP RPM] x 80–2147483648 / 21474836470–2147483648 / 2147483647HzRPM0.00–/+P27 [Motor NP Hertz] x 8–/+P28 [Motor NP RPM] x 8Read-WriteRW 32-bitIntegerRORealRW 32-bitIntegerRW 32-bitIntegerRORORO32-bitInteger32-bitIntegerRealData TypePowerFlex 750-Series User Manual – Publication 750-UM001C-EN-P – September 2009