Rockwell Automation 21G PowerFlex 750-Series AC Drives Programming Manual - Manual (Page 456)

456 Rockwell Automation Publication 750-PM001J-EN-P - October 2014
Appendix B Application Notes
Set Up the Drive
1. Adjust parameter settings and enter nameplate data.
Motor Tune Routines
Static Tune
This routine measures motor characteristics with the brake set (brake closed).
Rotate Tune
This routine gives better results if connected equipment allows. This routine
requires the mechanical brake to open and the motor be allowed to run at
minimum of 70% of nominal speed.
Inertia Tune
This routine measures the time to accelerate the system to the nominal speed.
Parameter Setting
Braking Details
P370 [Stop Mode A] 1 “Ramp”
P372 [Bus Reg Mode A] 2 “Dyn Brake” (Dynamic Braking)
P382 [DB Resistor Type] 1 “External”
P383 [DB Ext Ohms] Total Ohm value of external resistor.
P384 [DB Ext Watts] Total real watt rating of external resistor.
P385 [DB ExtPulseWatts] Maximum value for properly sized resistor.
P426 [Regen Power Lmt] –800% (Minimum Value)
Motor Nameplate Data
P25 [Motor NP Volts] Motor nameplate voltage.
P26 [Motor NP Amps] Motor nameplate current.
P27 [Motor NP Hertz] Motor nameplate frequency.
P28 [Motor NP RPM] Motor nameplate speed.
P29 [Mtr NP Pwr Units] 0 “HP” or 1 “kW”
P30 [Motor NP Power] Motor nameplate power rating.
P31 [Motor Poles] Number of motor poles.
Motor Control
P35 [Motor Ctrl Mode] 3 “Induction FV”
Motor Slip
P621 [Slip RPM at FLA] Synchronous Speed – P28 [Motor NP RPM]
Example:
6 pole – 980 RPM motor
Synchronous Speed = (NP frequency x 60 Secs)/pole pairs
(50 Hz x 60 Secs) / 3 = 1000 RPM
Slip = Synchronous Speed – Motor NP RPM = 1000 –980 = 20
RPM (enter 20 in P621)
Drive Duty Rating
P306 [Duty Rating] 1 “Heavy Duty”
Overload Hertz
P414 [Mtr OL Hertz] 0.00 (Ensures that no current derating is applied.)
Autotune Torque
P71 [Autotune Torque] 100.00% (Used during rotate tuning and inertia tuning.)
Protection
P420 [Drive OL Mode] 1 “Reduce PWM”
P422 [Current Limit 1] 200% of P26 [Motor NP Amps]
P444 [OutPhaseLossActn] 3 “FltCoastStop”