Rockwell Automation WebPak 3000 DC Drive Application Workbook Version 1.1 - Manual (Page 36)

5-2 WebPak 3000 DC Drive Application Workbook, Version 1.1
If FIELD ECONOMY ACTIVE (P.599) = ON , the field economy function is enabled. The
value of the reduced field voltage is a percentage of MOTOR HOT FLD AMPS (P.510) as
determined by the output of a multiplier block that multiplies P.510 by FIELD ECONOMY
REF (P.511). FIELD ECONOMY DELAY (P.501) will, after the motor stops, hold the field
voltage at its normal operating level for the time set by P.501, before entering field
economy.
If FIELD ECONOMY ACTIVE = OFF , the field economy function is bypassed.
þ
To configure the field reference:
▲
Set FIELD ECONOMY REF (P.511).
▲
Set FIELD ECONOMY DELAY (P.501).
▲
Set FIELD REF SELECT (P.521) to select the source of the primary field
reference.The choices are:
REGISTER - Uses the value set by FIELD REF REGISTER (P.513).
FULL FIELD - Sets the value to the maximum MOTOR HOT FIELD AMPS (P.510).
This selection is recommended if field auto weakening (spillover control) is
used.
FIELD SHAPING - Sets the value to the output of the field shaping function.The
output of the field shaping function is based on a TABLE LOOKUP block.
þ If FIELD REF SELECT (P.521) = REGISTER :
▲ Set FIELD REF REGISTER (P.513).
þ If FIELD REF SELECT (P.521) = FIELD SHAPING , the output of the field
shaping function is based on a TABLE LOOKUP block. Refer to figure A.11 in
Appendix A of the software manual (D2-3444). The TABLE LOOKUP block is
set up so that its output is indexed by the eight points set by FIELD INPUT
1-8 (P.530-P.537) whose values are based on the choice made by FIELD
SHAPING TYPE P.539.
The shaped field reference is generated by the values of the table set by
the eight points of
FIELD CURRENT 1-8 (P.522-P.529). These eight field
current reference points are determined from the motor field speed curve.
If this curve is not available, the field auto weaken function can be used to
determine the curve.
1
If factory defaults are restored or if a valid value has not yet been entered
for P.510, the DC field voltage is fixed at 150 V for a 230 VAC line or at
300 V for a 460 VAC line.
Range: 0 to 100% P.511 = %
Range: 0 to 27 MINUTES P.501 = MINUTES
Range: REGISTER , FULL FIELD , FIELD SHAPING P.521 =
Range: 0 to MOTOR HOT FLD AMPS (P.510) P.513 =
1 To use the field auto weaken function to determine the curve, set FIELD AUTO WEAKEN (P.517) to
ENABLE and run the motor from BASE SPEED (P.017) to GEAR IN SPEED (P.011). Record eight
values of FIELD FEEDBACK (P.589) over this range, and use these values to set FIELD CURRENT
1-8 . When finished, set P.517 to disable.