Rockwell Automation 20P PowerFlex Digital DC Drive User Manual
Page 127
Rockwell Automation Publication 20P-UM001I-EN-P - February 2013
127
Programming and Parameters
Chapter 3
MO
TO
R C
O
NT
ROL
Fie
ld Con
fig
919
[Set Fld Curve]
When set to “0”, this parameter controls the motor field current to field
reference curve according to the values specified in the [Fld Const xx Pct]
parameters. With this curve is defined, the result of [Max Fld Curr Pct] / [Flux
Ref Pct] equals the percentage of field current according to the characteristic
of the curve. This field is Write Only. After the value of this field is set to “0”, it
will automatically return to “1”. Leave set to the default value for permanent
magnet motor applications.
Note: See Tuning the Field Current Curve on page
for more information.
Default:
Min/Max:
1
0 / 1
16-bit
Int
916,
917,
918
920
[Reset Fld Curve]
When set to “1”, resets the drive to use a linear field curve. When this
parameter is set, Par 280 [Nom Mtr Fld Amps] is linearly changed through
[Max Fld Curr Pct] / [Flux Ref Pct]. This field is Write Only. After the value of
this field is set to “1”, it will automatically return to “0”. Leave set to the
default value for permanent magnet motor applications.
Default:
Min/Max:
Units:
0
0 / 1
16-bit
Int
921
[Out Volt Level]
The percentage of maximum output voltage based on the value in Par 175
[Rated Motor Volt]. In regenerative, field-weakened applications (hoist,
elevator, unwinder, etc.) the value of this parameter should be set less than
100% to allow operation when overcoming gravity). The value of this
parameter also determines the voltage where the drive begins field de-
fluxing while Field Weaken mode is active (Par 469 [Field Mode Sel] = “Field
Weaken”). Leave set to the default value for permanent magnet motor
applications.
Notes: This parameter can be assigned to an analog output or analog input
(by selecting “Out Volt Lvl”). The maximum value of this parameter was
changed from “100” for firmware version 3.001.
Default:
Min/Max:
Units:
100.0
0.0 / 110.0
%
Real
469
1407
[Field Econ Delay]
Amount of time to elapse once the drive reaches zero speed (as determined
by Par 107 [Speed Zero Level]) before field economy becomes active. Leave
set to the default value for permanent magnet motor applications.
Default:
Min/Max:
Units:
300
0 / 1800
s
16-bit
Int
107,
499
To
rq
A
tt
ribu
tes
7
[Current Limit]
Symmetrical current limit expressed as a percentage of the value in Par 179
[Nom Mtr Arm Amps]. This value applies to both current directions for four
quadrant drives.
• If Par 7 [Current Limit] is changed, Pars 8 [Current Lim Pos] and 9 [Current
Lim Neg] are set to the same value. If either the value of Pars 8 [Current
Lim Pos] or 9 [Current Lim Neg] is changed later, the last change is valid.
Note: The maximum value for this parameter has been changed from 200%
to 250% for firmware version 5.006.
Default:
Min/Max:
Units:
150
0 / 250
%
16-bit
Int
8,
9,
179
8
[Current Lim Pos]
The drive current limit for the positive current direction expressed as a
percentage of the value in Par 179 [Nom Mtr Arm Amps].
Notes: This parameter can be assigned to an analog input. The maximum
value for this parameter has been changed from 200% to 250% for firmware
version 5.006.
Default:
Min/Max:
Units:
150
0 / 250
%
Real
7
9
[Current Lim Neg]
The drive current limit for the negative current direction expressed as a
percentage of the value in Par 179 [Nom Mtr Arm Amps]. This parameter is
not active for two quadrant drives.
Notes: This parameter can be assigned to an analog input. The maximum
value for this parameter has been changed from 200% to 250% for firmware
version 5.006.
Default:
Min/Max:
Units:
150
0 / 250
%
Real
7
Fil
e
Gr
oup
No
.
Parameter Name & Description
See
page 110
for symbol descriptions
Values
Da
ta
T
yp
e
Rela
ted
A
A
A