Rockwell Automation 20P PowerFlex Digital DC Drive User Manual
Page 128
128
Rockwell Automation Publication 20P-UM001I-EN-P - February 2013
Chapter 3
Programming and Parameters
MO
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12
[Current Rate Lim]
Specifies the largest change in armature current reference that will be
allowed per current loop scan (2.7 ms @ 60Hz, 3.3 ms @ 50Hz AC line
frequency). A value of 100% indicates that the armature current reference
will not be permitted to change by more than rated motor current in a given
speed loop scan period.
Note: This parameter was added for firmware version 5.002.
Default:
Min/Max:
Units:
25
0.1 / 250
%
Real
39
[Torque Ref]
First current reference value, before any trim signals are incorporated, as a
percentage of the value set in Par 179 [Nom Mtr Arm Amps]. For firmware
version 2.005 or lower, this parameter is only used when Par 242 [Speed Reg
En] = 0 "Disabled".
Note: The current reference value is proportional to the armature current of
the motor and determines the torque. The polarity determines the torque
direction.
Default:
Min/Max:
Units:
0
– / +200
%
Real
40
[Trim Torque]
Second current reference value as a percentage of the value set in Par 179
[Nom Mtr Arm Amps]. [Trim Torque] is added to Torque Reference and can be
used as a correction value for the torque reference (regardless of the value of
Par 242 [Speed Reg En]).
Default:
Min/Max:
Units:
0
– / +200
%
Real
342
[Torque Reduction]
Selection for torque reduction. When the torque reduction function is active
(1 “Active”), the current limit changes accordingly by the percentage defined
in Par 13 [Torq Red CurLim]. When this parameter is set to 0 “Not Active”,
torque reduction is not active.
For example:
Par 7 [Current Limit] (or Pars 8 [Current Lim Pos] and 9 [Current Lim Neg])
= 80 %
Par 13 [Torq Red CurLim] = 70%
If Par 342 [Torque Reduction] = 0 “Not Active”, the current limit = 80 %
If Par 342 [Torque Reduction] = 1 “Active”, the current limit = 70 %
Note: This parameter can be assigned to a digital input.
Default:
Options:
0 =
0 =
1 =
“Not Active”
“Not Active”
“Active”
16-bit
Int
13
353
[Zero Torque]
Sets the reference value for the armature current (Par 41 [Current Reg In]) to
zero so that the drive has no torque.
• “Not Active” = Par 41 [Current Reg In] is not set to zero.
• “Active” = Par 41 [Current Reg In] is set zero. The drive has no torque.
Default:
Options:
1 =
0 =
1 =
“Not Active”
“Active”
“Not Active”
16-bit
Int
41
750
[TrqTpr Enable]
Enables/Disables the current/speed curve function.
• “Disabled” = The limits current /speed curve is disabled
• “Enabled” = The limits current /speed curve is enabled
Note: See Current / Speed Curve on page
Default:
Options:
0 =
0 =
1 =
“Disabled”
“Disabled”
“Enabled”
16-bit
Int
751,
752,
753,
754,
755,
756
751
[TrqTpr Lim0]
The current limit of the current/speed curve that operates constantly up to
the speed set in Par 756 [TrqTpr Spd]. When the current/speed curve function
is enabled (set in Par 750 [TrqTpr Enable]), this parameter will override the
current limits set in Pars 10 [Cur Lim Pos Out] and 11 [Cur Lim Neg Out].
Default:
Min/Max:
Units:
0
0 / 200
%
16-bit
Int
750,
756
752
[TrqTpr Lim1]
First reduced current limit of the current/speed curve. The value defined in
this parameter must be less than the value in Par 751 [TrqTpr Lim0] and
greater than the values in Pars 753 [TrqTpr Lim2], 754 [TrqTpr Lim3] and 755
[TrqTpr Lim4].
Default:
Min/Max:
Units:
0
0 / 200
%
16-bit
Int
750,
756
753
[TrqTpr Lim2]
Second reduced current limit of the current/speed curve. The value defined in
this parameter must be less than the value in Par 752 [TrqTpr Lim1] and
greater than the values in Pars 754 [TrqTpr Lim3] and 755 [TrqTpr Lim4].
Default:
Min/Max:
Units:
0
0 / 200
%
16-bit
Int
750,
756
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
A